CN213322538U

CN213322538U - Inner flip cover trailer hook

Info

Publication number: CN213322538U
Application number: CN202021567076.XU
Authority: CN
Inventors: 唐刚
Original assignee: Chengdu Super Banner Technology Co ltd
Current assignee: Chengdu Super Banner Technology Co ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-06-01
Anticipated expiration: 2030-07-31

Abstract

The utility model discloses an interior flip drags the 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 enstrophe formula upper cover, and the mode that the ball cover can be dismantled to the drag ball adoption can quick replacement, can adapt to the demand of pulling of different car as a house, and other equipment of dragging of can additionally inserting of extension jack of front end have further expanded application range.

Description

Inner flip cover trailer hook

Technical Field

The utility model belongs to the technical field of mechanical design and manufacturing, especially, belong to auto-parts design and manufacturing technical field, in particular to an interior flip-flop drags coupler that is used for car to pull 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 utility model aims to provide a: 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 utility model discloses a following technical scheme realizes:

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, tow ball installation sunken hole, tow ball and tow ball through screw hole, be provided with the tow ball pole on the U-shaped arm body, tow ball pole upper portion is provided with the through screw hole, be provided with the horizontal counter bore of tow ball that tow ball installation sunken hole and tow ball that link up the screw hole position with the tow ball on the tow ball, tow ball installation sunken hole entangles the tow ball pole, and the horizontal counter bore of tow ball and tow ball pole through screw hole are passed.

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 utility model has the advantages that:

in the utility model, the upper cover can be turned inwards on the U-shaped arm body by taking the locking transverse pin as an axis, when the upper cover is in a release state and forms a closed ring with the U-shaped arm body, the rescue and traction cable rope can be effectively prevented from being separated, when a house car with a towing ball cover needs to be towed and configured, the upper cover presses down towards the inner side of the U-shaped arm body, the towing ball is in a working state by the driving action of the torsional spring, the towing ball and the upper cover ratchet slide relatively along the ratchet inclined plane until the upper cover is meshed to ensure that the upper cover keeps an inwards-turned folded state, the purpose that the towing ball does not interfere with other suspended objects on the back of the car in the turning process of the upper cover is achieved, the lateral thrust is applied to the upper cover along the ratchet direction, the upper cover can slide, thereby the ratchet meshing state is released, the upper cover is restored to the release state under the torsional force of the torsional spring, the locking and the positioning of the, 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.

The utility model discloses in, the mode erection joint in tow ball pole upper portion of tow ball through the nested horizontal lock that adds of heavy nest of tow ball installation has realized need not large-scale specialized tool and can dismantle fast, change the tow ball, can change different specifications tow ball adaptation difference rapidly and pull the requirement.

The utility model discloses in, U-shaped arm body front end is provided with general hoist extension jack, makes things convenient for other rescues, pulls the quick installation of hanger hoist, has reached the difference of quick response and has pull, rescue demand, makes things convenient for the swift installation of third party extended functionality part to reach multipurpose, multi-functional use purpose.

Drawings

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

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

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

FIG. 4 is a three-dimensional structure diagram of the present invention;

FIG. 5 is a diagram of the inner-turning state of the upper cover of the present invention;

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

FIG. 7 is a partial sectional 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 of the present invention;

FIG. 10 is a perspective view of the drag ball of the present invention;

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

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

fig. 13 is a releasing state diagram of the upper cover of 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 positioning of the upper cover of the utility model;

fig. 16 shows embodiment 2 of the present invention;

fig. 17 shows embodiment 3 of the present invention;

fig. 18 shows embodiment 4 of the present invention;

fig. 19 shows embodiment 5 of the present invention;

fig. 20 shows embodiment 6 of the present invention;

fig. 21 shows embodiment 7 of the present invention.

Wherein, 1 is a U-shaped arm body; 11-a tow ball rod; 111-the ball-pulling rod runs through the threaded 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 is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed", "mounted", "connected" and "connected" are to be interpreted broadly, e.g. as a fixed connection, a detachable connection or an integral connection; 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 below by way of embodiments, which are only used for further description of the present invention, but should not be construed as limiting the scope of the present invention, and the modifications and adjustments made by those skilled in the art according to the above-mentioned contents of the present invention are also included in the scope of the present invention.

With reference to fig. 1 to 21:

example 1

The inner flip cover towing hook comprises a U-shaped arm body 1 provided with a mounting base 13, a towing ball 2, an upper cover 3 and an expansion jack 12 arranged at the front end of the U-shaped arm body 1.

An upper cover ratchet 32 used for positioning the upper cover 3 is arranged on one inner side of the upper cover 3, a lifting lug 14 used for installing and connecting the upper cover 3 is arranged on the U-shaped arm body 1, a lifting lug ratchet 141 opposite to the upper cover ratchet 32 is arranged on one side of the lifting lug corresponding to the upper cover ratchet 32, the upper cover 3 passes through the lifting lug 14 through a locking transverse pin 33 to form hinge connection with the U-shaped arm body 1, a torsion spring 4 is arranged on the locking transverse pin 33, a pin sleeve 331 is arranged at one end of the locking transverse pin 33, two ends of the torsion spring 4 respectively support the lifting lug 14 and the pin sleeve 331 to simultaneously provide lateral thrust and radial torsion for the upper cover 3, the upper cover 3 can be turned over towards the inner side of the U-shaped arm body 1 by taking the locking transverse pin 33 as an axis, the locking transverse pin 33 drives the upper cover 3 to axially slide in a limited range of the lifting lug 14, and forms a closed ring with the U-shaped arm body 1 when the upper cover 3 is in a release state, when the recreational vehicle provided with the towing ball cover needs to be towed, the upper cover 3 is pressed towards the inner side of the U-shaped arm body 1, the towing ball 2 is in a working state due to the driving action of the torsion spring 4, the lifting lug ratchet 141 and the upper cover ratchet 32 slide relatively along the ratchet inclined plane until the upper cover 3 is meshed to enable the upper cover 3 to keep an inwards-turned folded state, the upper cover 3 is not interfered with other hanging objects at the rear part of the motor vehicle in the turning process, the upper cover 3 can slide axially along the opposite lock transverse pin 33 by applying lateral thrust to one side of the ratchet 32, the meshing state of the

ratchets

32 and 141 is released, and the upper cover 3 is restored to a released state under the torsion force of the torsion spring 4.

The tow ball 2 entangles through tow ball installation sinking nest 22 and sets up in the 11 upper portions of tow ball poles of U-shaped arm body 1 to on passing tow ball horizontal counter bore 21 and tow ball pole 11 through holding screw 5 and lining up screw hole 111 with it being fixed in tow ball pole 11, realized that tow ball 2 dismantles, changes the convenience, but the different specifications of quick replacement tow ball adaptation difference pull the demand.

The front end of the U-shaped arm body 1 is provided with a universal lifting appliance expansion jack 12, so that other rescues and quick installation of a traction hanger lifting appliance are facilitated, different traction and rescue requirements of quick response are met, and quick installation of a third-party expansion functional part is facilitated, so that the purposes of multipurpose and multifunctional use are achieved.

Example 2

The expansion jack 12 can be removed from the whole towing hook system, and the towing ball 2 is integrally manufactured with the U-shaped arm body 1, so that the aim of reducing the manufacturing cost is fulfilled.

Example 3

The towing ball 2 and the towing ball rod 11 can be replaced by a claw-shaped hook, so that the upper cover 3 and the U-shaped arm body 1 can form a larger closed ring body to accommodate towing cables with larger diameters.

Example 4

The mounting base 13 can be designed and manufactured for different vehicle model mounting standards.

Example 5

The mounting base 13 of the U-shaped arm body 1 with the claw can be designed and manufactured into a square tube quick-plug form aiming at a universal square socket.

Example 6

The U-shaped arm body 1 is integrated with a detachable tow ball 2, an expansion jack 2 and a square tube quick-insertion type mounting base 13 at the same time.

Example 7

The expansion jack 12 additionally hangs a standard towing tool 6.

Claims

1. The utility model provides an interior flip-flop drags coupler, 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 slide laterally on the U-shaped arm body to limit the distance and can be turned over towards the inner side of the U-shaped arm body and locked or unlocked, a towing ball rod is arranged on the U-shaped arm body, a towing ball mounting sinking socket is arranged on the towing ball, the towing ball is mounted and connected on the U-shaped arm body in a mode of crossing a dowel, and a mounting base used for being connected and fixed with an automobile is arranged at the rear end of the U-shaped arm body.

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 upper portion of the towing ball rod is provided with a towing ball rod through threaded hole, the towing ball is provided with a towing ball transverse counter bore corresponding to the position of the towing ball rod through threaded hole, the towing ball rod is sleeved with the towing ball mounting counter bore, and the towing ball transverse counter bore and the towing ball rod through threaded hole are penetrated through by a set screw, so that the towing ball is fixedly connected onto the towing ball rod.

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.