WO2019231082A1

WO2019231082A1 - Trailer jack wheel

Info

Publication number: WO2019231082A1
Application number: PCT/KR2019/002864
Authority: WO
Inventors: 차호철
Original assignee: Cha Ho Chul
Priority date: 2018-05-30
Filing date: 2019-03-13
Publication date: 2019-12-05
Also published as: KR20190136275A

Abstract

A trailer jack wheel is disclosed. The trailer jack wheel comprises: a jack body which includes a first support and a second support arranged in a fitted state to be mutually slidable and supports a traction frame side of a trailer on a road surface; a wheel part including wheels formed to support the lower side of the jack body in a movable state on a road surface; a height adjusting part formed on the jack body side so that the first support side and the second support side of the jack body can be operated to be mutually slidable by contact force of a screw part; and a wheel operation part formed on the jack body side so that the wheels of the wheel part can be operated to be rotatable by contact force of a gear part.

Description

Jack Wheel for Trailer

The present invention relates to a jack wheel for a trailer.

In general, trailers used for camping, etc. are used to be connected to the vehicle side to be pulled, jack wheel (JACK WHEEL) is used as a means for securing convenience when moving or disconnecting the heavy trailer to the vehicle side.

Jack wheels come in many forms and modes of operation, but most have wheels for movement on the underside and can support the towing frame (also called "A frame") side of the trailer while being movably erected on the road surface. It is formed to have a structure.

Therefore, the jack wheel can not only support the towing frame side of the trailer in a state consistent with connecting or disconnecting the trailer to the vehicle side, but also ensures that the trailer separated from the vehicle can be stably stored in a parking area or the like. I can support it.

Particularly, in order to secure work efficiency and convenience when connecting or detaching a heavy trailer to the vehicle side using a jack wheel as described above, it is formed to have a structure that can provide operation and functionality corresponding to the lightweight compactness of the jack wheel. It is desirable to be.

The present invention has been made to solve the conventional problems as described above,

SUMMARY OF THE INVENTION An object of the present invention is to provide a jack wheel for a trailer that can ensure satisfactory operation convenience and functionality while realizing lightweight compactness.

In order to realize the object of the present invention as described above,

A jack main body having a first support and a second support disposed in a connected state slidably fitted to each other, the jack main body supporting the trailer frame side on a road surface;

A wheel unit having wheels formed to support a lower side of the jack body in a movable state on a road surface;

A height control unit formed on the jack main body side in a state in which the first support and the second support side of the jack main body can be slidably manipulated by a screw contact force; And

A wheel operation unit formed at the jack body side in a state in which the wheels of the wheel unit can be rotatably operated by a gear unit contact force;

It provides a jack wheel for trailer comprising a.

The present invention is not only made of a single support body in the form of a jack body, but also to adjust the height of the support in a standing state on the road surface, and is formed to have a structure that can be operated to move, so that the weight of the device and While miniaturization is possible, satisfactory functionality can be obtained.

Therefore, the present invention can expect further improved operation convenience and functionality when connecting or disconnecting the trailer in a state that can be towed to the vehicle side.

1 is a view for explaining the use example of the trailer jack wheel according to an embodiment of the present invention.

2 is a view schematically showing the overall structure of a jack wheel for a trailer according to an embodiment of the present invention.

3 is a view schematically showing the internal structure of a jack wheel for a trailer according to an embodiment of the present invention.

4 to 5 are views for explaining the operation of the height control unit of the jack wheel for trailers according to an embodiment of the present invention.

6 to 7 are views for explaining the operation of the wheel operation of the trailer jack wheel according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

One embodiment of the present invention is described within the scope of the practice of the present invention by those skilled in the art.

Therefore, since an embodiment of the present invention can be modified in many different forms, the claims of the present invention are not limited to the embodiments described below.

1 is a view for explaining the use example of the trailer jack wheel according to an embodiment of the present invention, Figure 2 is a view showing the overall structure of the trailer jack wheel according to an embodiment of the present invention, Figure 3 Is a view schematically showing the internal structure of the trailer jack wheel according to an embodiment of the present invention, Figures 4 to 5 are views for explaining the operation of the height control unit of the jack wheel for trailers according to an embodiment of the present invention. 6 to 7 are views for explaining the operation of the wheel operation of the trailer jack wheel according to an embodiment of the present invention.

1 to 7, a jack wheel for a trailer according to an embodiment of the present invention includes a jack main body 2, a wheel part 4, a height operation part 6, and a wheel operation part 8.

When the jack body 2 is connected to the tow frame T1 of the trailer T on the vehicle M side as shown in FIG. 1 or stored in a state separated from the vehicle M, the tow frame T1 is matched thereto. ) Side is formed to have a support structure that can support in a horizontal state on the road surface (R).

In particular, the jack body 2 is formed to have a variable length structure that can be expanded or reduced in length while forming a single support.

To this end, the jack body 2 is provided with a first support 10 and a second support 12, as shown in Figures 2 to 3, the first support 10 and the second support 12 is the length It may be formed to be connected to each other slidably in the direction connected.

That is, the first support 10 and the second support 12 is formed in the form of a bar (BAR) has a hollow portion formed inside the circumference of the polygon (or circular) shape, the circumferential side of the first support (10) The second support 12 side is inserted in a wrapping state so that they can be formed to form a jack body 2 having a variable length in a state of sliding in the bar length direction.

The material of the first support 10 and the second support 12 is a metal material, it is preferable to select a material excellent in resistance to load, pressure, impact, etc. from the metal material.

The jack body 2 side may be provided with a handle 14 as shown in Figure 3, the handle 14 is, for example, installed in a folding form on one side of the second support 12 of the jack body (2) Can be.

And, the upper side of the jack body (2) is provided with a connecting bracket portion 16, as shown in Figures 1 to 2, this connecting bracket portion 16 is the jack body (2) side of the trailer (T) towing frame (T1) serves to hold the side so that it can be connected and fixed to the frame side.

The connecting bracket part 16 has fixing plates 18 as shown in FIGS. 2 to 3, and the fixing plates 18 are connected to one side of the towing frame T1 by the tightening force of the bolts 20. It may be made of a conventional structure that can hold the frame circumferential side in a pressing state, it may be provided in a fixed form integrally formed on the upper side of the jack body (2), or detachably formed.

The wheel part 4 is formed so that the lower side of the jack main body 2 can be movably supported on the road surface R. As shown in FIG.

As shown in FIGS. 2 to 3, the wheel part 4 may include two wheels 22 as a pair, and the two wheels 22 may be fitted to the wheel shaft 24 side of the jack body 2. It may be fixed to the lower side of the first support (10).

The wheel shaft 24 is installed on the lower side of the first support 10 in a state capable of free rotation about an axis, and in a state in which the wheels 22 can rotate in the same direction as each other when rotated about an axis. Is set.

For example, a rubber tire may be installed at the circumferential side of the wheel 22 to prevent slippage and secure rotational stability.

On the other hand, the height operation unit 6 is made of a structure that can be operated and operated to enable the height adjustment of the base of the jack main body 2 having a variable length structure.

The height operation part 6 is formed so that the 1st support 10 and the 2nd support 12 of the jack main body 2 may mutually slide in a longitudinal direction by the power transmission method by a screw part contact force.

That is, the height operation part 6 and the height operation tool 26 arrange | positioned in the state which can be rotated on the side of the 2nd support stand 12 of the jack main body 2, as shown in FIGS. It is provided with a height guide sphere 28 formed on the side of the first support (10) in a state capable of generating a thread contact force during the rotation operation of the sphere (26).

The height operation tool 26 may be formed in a shaft shape, and a first screw part 30 having a male thread shape is formed at the circumferential side of the shaft, and the second support 12 in a state capable of free rotation about the axis line. ) Is fixed to the circumferential side.

The height operation tool 26 is arrange | positioned so that it may be in parallel with each other, the 1st support stand 10 and the 2nd support stand 12 side of the jack main body 2.

The height guide sphere 28 is formed with a second threaded portion 32 in the form of a female thread corresponding to the first threaded portion 30 of the height adjustment tool 26, and the screw portion during the forward and reverse rotation operation of the height adjustment tool 26. The height operation tool 26 side is formed on the first support 10 side in a state capable of being guided and supported to be movable in the up and down directions along the axis by the coupling force.

The height operation part 6 can induce the sliding operation in the state in which the jack body 2 side is extended or reduced in the longitudinal direction during the forward and reverse rotation operation of the height operation tool 26.

For example, to adjust the height of the base of the jack body 2 to be expanded, the height operation tool 26 is rotated in one direction about an axis as shown in FIG.

Then, the first threaded portion 30 of the height control tool 26 and the second threaded portion 32 side of the height guide tool 28 generate a latching contact force by biting the male and female threaded portions with each other. Support height expansion operation may be made in a state in which the support 12 side is slid upward from the first support 10 side.

Then, to adjust the height of the jack body 2 to be reduced, the height operation tool 26 as shown in Figure 5 rotates about the axis in the opposite direction to the above.

Then, the first threaded portion 30 of the height control tool 26 and the second threaded portion 32 side of the height guide tool 28 generate a latching contact force by biting the male and female threaded portions with each other. The support height reduction operation may be performed in a state in which the support 12 is slid downward from the first support 10 side.

According to the structure of the height operation unit 6, it is possible to easily adjust the height of the support of the jack body 2 to achieve a support state corresponding thereto according to the use environment.

And, the height operation unit 6 is formed so as to rotate around the axis in a state in which the height operation tool 26 side is disposed in parallel with the jack body 2 side, the structure to match the miniaturization and lightweight implementation of the jack wheel Can be provided.

The wheel operation unit 8 is formed so as to rotate and operate the wheel unit 4 side so that the jack body 2 side can be moved on the road surface R by the wheel unit 4.

The wheel operation part 8 is formed to rotate the wheel part 4 side by a power transmission method by the gear part contact force.

That is, the wheel operation part 8 has the 1st gear part 36 like FIG. 2 thru | or 3, and the rotation operation tool 34 arrange | positioned in the state which can be rotated inside the jack main body 2, and this rotation It is provided with the rotation guide tool 38 which has the 2nd gear part 40 corresponding to the 1st gear part 36 side of the operation tool 34, and is arrange | positioned at the wheel part 4 side.

The rotation manipulation tool 34 may be formed in a bar shape as shown in FIG. 3, and is disposed inside the jack body 2 in a state in which the first gear part 36 is positioned on the lower side in the longitudinal direction of the bar.

The rotary operation tool 34 is fixed to be rotatable about the central point of the bar in a state parallel to each other in the jack body 2 and the side of the first support 10 and the second support 12, The first gear portion 36 side is arranged so as to be in contact with the wheel portion 4 side with the gear portion.

And, the bar longitudinal direction upper side of the rotary operation tool 34 is arranged to protrude to the upper outer side of the jack body 2 as shown in Figure 2 is a separate operation lever 42 for rotational operation is inserted into the protruding portion side By the operation of the operation lever 42, it is set to be able to rotate forward and backward about the center point of the bar circumference.

Rotation operation tool 34 is formed so that the length can be changed in connection with the support height when the height of the support is adjusted in the state that the length of the jack body 2 is expanded or reduced by the operation of the height operation unit (6).

That is, the rotation operation tool 34 is composed of two connecting

bars

44 and 46 as shown in FIG. 3, and the connecting

bars

44 and 46 are slidably fitted to each other in the bar length direction. Is set.

At this time, the connecting bar 44 of the lower side of the two connecting bar (44, 46) is fixed to the side of the first support (10) of the jack body 2, the connecting bar 46 of the upper side is the second support It is fixed to the (12) side.

Then, when the length of the jack body 2 is adjusted as shown in FIGS. 4 to 5 by the operation of the height operation unit 6, the two connecting

bars

44 and 46 slide in connection with each other and the jack body ( The length of the rotary operation tool 34 can be changed in a state corresponding to the adjusted length of 2).

As shown in FIG. 3, the rotation guide tool 38 includes the wheel shaft 24 of the wheel part 4 with the second gear part 40 side corresponding to the first gear part 36 side of the rotation operation tool 34. It is formed in a state fixed to the side.

The first gear part 36 of the rotary operation tool 34 and the second gear part 40 of the rotation guide tool 38 are worm gears composed of a worm gear part and a worm wheel gear part. In the form of a worm gear, the gears may be formed to bite each other.

That is, as shown in FIG. 3, the first gear part 36 has a worm gear part shape and is located at the lower side of the rotary operation tool 34, and the second gear part 40 has a worm wheel gear part shape and a wheel part ( 4) may be located on the wheel shaft 24 side.

The wheel manipulation unit 8 may induce the wheel unit 4 to be rotated so that the jack body 2 can be moved during forward and reverse rotation manipulation of the rotation manipulation tool 34.

For example, in order to operate the jack main body 2 to move forward on the road surface R, as shown in FIG. 6, the end side of the rotary operating tool 34 protruding to the upper side of the jack main body 2 is operated by the operating lever 42. Rotate in one direction around the axis using).

Then, by the gear portion bite between the first gear portion 36 and the second gear portion 40 generates a locking contact force in accordance with the forward movement, thereby the wheel portion (a state in which the forward movement of the jack body 2 is possible) The wheels 22 of 4) can be rotated.

And, in order to operate the jack main body 2 to move backward on the road surface R, as shown in FIG. 7, the rotation operation tool 34 side is rotated about an axis in the opposite direction to the above.

Then, by the gear portion bite between the first gear portion 36 and the second gear portion 40 generates a locking contact force in accordance with the reverse movement, thereby the wheel portion (a state in which the reverse movement of the jack body 2 is possible) The wheels 22 of 4) can be rotated.

According to the structure of such a wheel operation part 8, the wheel part 4 side can be easily rotated so that the jack main body 2 can be moved in the state corresponded according to a use environment.

And the wheel operation part 8 is formed so that the rotation operation tool 34 and the rotation guide tool 38 side may have a structure which hardly protrudes outward from the jack main body 2 and the wheel part 4 side, and therefore, miniaturization of a jack wheel And a structure consistent with the lightweight implementation.

In addition, the first gear portion 36 and the second gear portion 40 of the wheel operating portion 8 is in the form of a worm gear to facilitate the operation for generating and transmitting the rotational force of the wheel portion 4, in particular, the operation is stopped In the state, it is possible to secure a further improved operation stability by providing a gear part biting structure that can freely suppress free rotation of the wheel part 4 side.

Therefore, in the present invention, when the trailer T is fixed to the vehicle M side as shown in FIG. 1 or when the trailer T is stored in a state separated from the vehicle M, the trailer T is in a state consistent with this. It is possible to provide a support structure capable of stably supporting the towing frame (T1) side of the road on the road surface (R).

In particular, the present invention is the jack body (2) is formed in the form of a single support that can reduce the volume and weight, and the height operation unit 6 and the wheel operation unit (8) to have a shape that matches the side of the jack body (2) Since is formed, it is possible to ensure satisfactory operation convenience and functionality while realizing the miniaturization and light weight of the jack wheel.

Claims

A jack main body having a first support and a second support disposed in a connected state slidably fitted to each other, the jack main body supporting the trailer frame side on a road surface;

A wheel unit having wheels formed to support a lower side of the jack body in a movable state on a road surface;

A height control unit formed on the jack main body side in a state in which the first support and the second support side of the jack main body can be slidably manipulated by a screw contact force; And

A wheel operation unit formed at the jack body side in a state in which the wheels of the wheel unit can be rotatably operated by a gear unit contact force;

Jack wheel for trailer comprising a.
The method according to claim 1,

The jack body,

Jack jack for trailer is formed to slide in a state in which the length is extended or reduced in the connecting direction of the first support and the second support.
The method according to claim 1,

The height operation unit,

A jack wheel for a trailer comprising a height adjusting tool provided with a first threaded part in the form of a male thread and a height guide tool formed with a second threaded part in the form of a female thread corresponding to the first threaded side of the height adjusting tool.
The method according to claim 1,

The wheel operation unit,

A jack wheel for a trailer comprising a rotary operation tool provided with a first gear portion, and a rotary guide tool formed with a second gear portion corresponding to each other with the first gear portion side of the rotary operation tool.
The method according to claim 4,

The first gear portion and the second gear portion,

Trailer jack wheel, characterized in that formed in the worm gear form the bite of each other.