KR101344192B1 - Apparatus for elevating auxiliary wheel of toe truck - Google Patents

Abstract

The present invention is a rear wheel shaft coupled to the rear wheels of the tow vehicle at both ends, a fixed shaft disposed on the upper side of the rear wheel shaft, a first pressing member coupled to the front of the fixed shaft, which can be pressed outward, is disposed in front of the fixed shaft, A sliding shaft coupled to the front of the pressing member and slid back and forth by the expansion and contraction of the first pressing member, an upper bracket coupled to the lower side of the fixed shaft, disposed on the rear of the rear wheel shaft, one end of the auxiliary shaft coupled to both ends of the towing vehicle A coupling member which is fixedly coupled to the auxiliary shaft, the other end of which is hinged to the rear wheel shaft, a lower bracket which is coupled to the rear of the auxiliary shaft, and a second pressing member which is coupled to the upper bracket and the lower bracket and pressurized to the outside, respectively. The upper end of the upper bracket is coupled to the sliding shaft and the other end is coupled to the lower bracket to induce a change in direction of the chain and the chain. Tow vehicle auxiliary wheel lifting device including a fisherman. According to the present invention, by providing the second pressing member and the chain it is possible to raise and lower the auxiliary shaft with only one first pressing member, the structure is simple and economical. In addition, by providing the chain and the gear portion can easily raise and lower the auxiliary wheel can be used semi-permanently because the wear of the chain is less. Furthermore, the second pressing member can be applied to both the spring or the pressure control balloon is easy to manufacture as needed.

Description

Towing Vehicle Lifting Device {Apparatus for elevating auxiliary wheel of toe truck}

The present invention relates to a lifting device, and more particularly to a device capable of lifting and lowering the auxiliary wheel of the tow vehicle.

A towing vehicle is a special vehicle for towing a towed vehicle, such as an accident vehicle, or towing a vehicle that is in violation of a parking vehicle. Tow vehicles generally include a tow bar method and an under lifting method. .

The tow bar method is also called a tripod method, and the tow bar is towed using the tow bar. In addition, the underlifting method is a method of lifting the front wheel of the vehicle and towing. The tow bar system is used when the wheel of the to-be-vehicle is punctured or when the front part of the to-be-vehicle is largely damaged.

1 is a side view showing a conventional tow vehicle, Figure 2 is a perspective view showing a device for lifting the auxiliary wheel of the tow vehicle shown in FIG.

Referring to FIG. 1, which shows an under-lifting towing vehicle, when the towing vehicle is to be driven and towed the towed vehicle, the tow vehicle is lowered after the boom B is engaged to bind the towed vehicle. (W) is towed up. Recently, auxiliary wheels (AW) are separately installed along with front wheels (FW) and rear wheels (BW). That is, by reducing the weight of the towing vehicle applied to the front wheel (FW) and the rear wheel (BW) through the auxiliary wheel (AW) to reduce the load, it is possible to perform a safer and more stable towing operation.

Since the auxiliary wheel AW does not need to be used when the other vehicle is not towed, the vehicle is driven in the raised state, and when the tow other vehicle is driven, the auxiliary wheel AW is lowered to contact the ground.

In order to raise and lower the auxiliary wheel (AW), a device such as FIG. 2 is conventionally used. That is, the auxiliary shaft 11 to which the auxiliary wheel AW is coupled is coupled to a pair of N-shaped frames 12, and pressure control balloons 13 and 14 are coupled to both ends of the frame 12, respectively. .

When the air is injected into the pressure control balloon 13 in the front to expand and the air is released from the pressure control balloon 14 in the rear, the frame 12 is lowered through the hinge H and the auxiliary shaft 11 coupled thereto. As it descends, the auxiliary wheel AW comes into contact with the ground.

On the contrary, when air is injected into the pressure regulating balloon 14 at the rear and expands, and air is released from the pressure regulating balloon 13 at the front, the frame 12 is lifted up through the hinge H and the auxiliary shaft coupled thereto ( 11) Ascend, the auxiliary wheel (AW) will fall off the ground.

However, such a conventional lifting device requires four pressure regulating balloons 13 and 14 and adjusts each pressure by air pressure, which is complicated and occupies a lot of space.

In order to solve this problem, Korean Patent No. 10-1096390 proposes a device capable of lifting and lowering an auxiliary wheel with a pressure control balloon having an elastic member and a metal wire, thereby providing a simple device, which takes up less space and is economical. It shows the effect.

However, the device according to Korean Patent No. 10-1096390 has a inconvenience in use because it does not move flexibly when the provided metal wire moves up and down, and as the number of lifting up and down the auxiliary wheels increases. There is a problem that the metal wire is cut and broken.

SUMMARY OF THE INVENTION An object of the present invention is to provide a semi-permanent towing vehicle auxiliary wheel lifting device which is simple in structure and economical, and is easy to lift and lower of auxiliary wheels.

In order to achieve the above object, the towing vehicle auxiliary wheel lifting device according to an embodiment of the present invention, the rear wheel shaft coupled to the rear wheels of the towing vehicle; A fixed shaft disposed above the rear wheel shaft; A first pressing member coupled to the front of the fixed shaft and capable of pressing outward; A sliding shaft disposed in front of the fixed shaft and coupled to the front of the first pressing member and slid back and forth by the expansion and contraction of the first pressing member; An upper bracket coupled to the lower side of the fixed shaft; An auxiliary shaft disposed at the rear of the rear wheel shaft and having auxiliary wheels of a towing vehicle coupled to both ends thereof; A coupling member having one end fixedly coupled to the auxiliary shaft and the other end hingedly coupled to the rear wheel shaft; A lower bracket coupled to the rear of the auxiliary shaft; A second pressing member having both ends coupled to the upper bracket and the lower bracket and capable of being pressed outward; A chain having one end coupled to the sliding shaft and the other end coupled to the lower bracket; And a gear part provided on an upper surface of the upper bracket to induce a change in direction of the chain.

Here, the gear portion, the driven gear is rotated in engagement with the chain, the center portion is fixed to the center of the driven gear, the driven shaft and the driven shaft to rotate integrally with the driven gear and the driven shaft both ends are rotatable An insertion hole to be inserted may be formed, and the lower side may include a pair of support members fixed to an upper surface of the upper bracket.

In addition, the first pressing member may be a pressure control balloon that is pressurized to the outside by the air pressure control, the second pressing member may be a spring for applying a restoring force to the outside.

In addition, the first pressing member and the second pressing member, respectively, may be a pressure control balloon capable of pressing outward by the air pressure control.

Further, the upper bracket, the coupling member, the lower bracket, the second pressing member, the chain and the gear portion may be provided with a pair, respectively.

According to the towing vehicle auxiliary wheel lifting device according to an embodiment of the present invention,

First, since the auxiliary wheel can be raised and lowered only by the first pressing member and the pair of second pressing members, the structure is simple and economical.

Second, by providing the chain and the gear portion can easily raise and lower the auxiliary wheel, and wear of the chain is semi-permanent.

Third, the second pressing member can be applied to both the spring or the pressure control balloon, it is easy to change the production as needed.

Fourth, when the central portion of the fixed shaft is bent toward the letter C and both ends of the auxiliary shaft are bent toward the rear, it is possible to minimize the space that interferes with the boom of the tow vehicle.

1 is a side view showing a conventional towing vehicle.
FIG. 2 is a perspective view illustrating an auxiliary wheel elevating device of a vehicle of the tow vehicle illustrated in FIG. 1.
3 is a plan view showing a towing vehicle auxiliary wheel lifting device according to an embodiment of the present invention.
4 is a rear view showing the towing vehicle auxiliary wheel lifting device shown in FIG.
5 is a perspective view of the towing vehicle auxiliary wheel lifting device shown in FIG.
FIG. 6 is an enlarged perspective view of a gear part of portion 'A' illustrated in FIG. 5.
7 is a perspective view showing a towing vehicle auxiliary wheel lifting device according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that, in the drawings, the same components are denoted by the same reference symbols as possible. Further, the detailed description of known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some of the components in the drawings are exaggerated, omitted, or schematically illustrated.

Figure 3 is a plan view showing a towing vehicle auxiliary wheel lifting device according to an embodiment of the present invention, Figure 4 is a rear view showing a towing vehicle auxiliary wheel lifting device shown in Figure 3, Figure 5 is a towing shown in Figure 3 6 is a perspective view showing an enlarged gear unit of the 'A' portion shown in Figure 5, Figure 7 shows a towing vehicle lifting device according to another embodiment of the present invention Perspective view.

3 to 6, the towing vehicle auxiliary wheel lifting device is the rear wheel shaft 110, the fixed shaft 120, the first pressing member 130, the sliding shaft 140, the upper bracket 150, auxiliary It includes the shaft 160, the coupling member 170, the lower bracket 180, the second pressing member 210, the chain 220 and the gear unit 230. As shown, the upper bracket 150, the coupling member 170, the lower bracket 180, the second pressing member 210, the chain 220 and the gear unit 230 are each provided with a pair.

First, the rear wheel shaft 110 is provided in a general traction vehicle to surround the shaft coupled to the rear wheel (BW) of the traction vehicle at both ends is disposed so as not to be affected by the rotation of the rear wheel (BW).

The fixed shaft 120 is spaced apart from the rear wheel shaft 110 and disposed above the rear wheel shaft 110. The fixed shaft 120 may be bent toward the U at the center portion 120a to minimize the space that interferes with the boom B of the tow vehicle (see FIG. 5).

The first pressing member 130 is coupled to the front of the fixed shaft 120, it is possible to press outward. The first pressing member 130 may be provided with a pressure control balloon capable of adjusting the pressure so that the first pressing member 130 may expand and contract in the front and rear directions by adjusting the air pressure. Here, the air pressure control may use an air tank or the like provided in the vehicle.

Sliding shaft 140 is disposed in front of the fixed shaft 120, coupled to the front of the first pressing member 130 is slid back and forth by the pressing of the first pressing member 130. More specifically, as shown in FIG. 5, the sliding shaft 140 is slid back and forth by the sliding grooves SH formed in the support S on both sides. That is, when pressure is applied to the first pressing member 130, the sliding shaft 140 slides forward. On the contrary, when the pressing is not applied on the first pressing member 130, the sliding shaft 140 slides backward. .

Of course, when the pressure is not applied to the first pressing member 130, the sliding shaft 140 is sliding backward because the pressing of the second pressing member 210 to be described later.

The upper bracket 150 is coupled to the lower side of the fixed shaft 120 as a flat plate shape.

The auxiliary shaft 160 is disposed at the rear of the rear wheel shaft 110, and the auxiliary wheels AW of the tow vehicle are coupled to both ends. The auxiliary wheel AW may also be provided with a separate braking device for applying an additional braking force. In addition, both ends 160a of the auxiliary shaft 160 are bent backwards to minimize space interfering with the boom B. As shown in FIG. At this time, the auxiliary wheel (AW) is coupled to the bent both ends (160a) of the auxiliary shaft (160).

One end of the coupling member 170 is fixedly coupled to the auxiliary shaft 160 and the other end is hinged to the rear wheel shaft 110. The auxiliary shaft 160 may be hinged with respect to the rear wheel shaft 110 by the coupling member 170.

The lower bracket 180 is coupled to the rear of the auxiliary shaft 160 as a flat plate shape.

The second pressing member 210 is applied to the outside and both ends are coupled to the upper bracket 150 and the lower bracket 180, respectively. That is, the upper bracket 150 and the lower bracket 180 serve to support the second pressing member 10. For example, the second pressing member 210 may be a spring or a pressure control balloon used in the vehicle. As shown in FIG. 5, when the second pressing member 210 is a spring, the spring may move up and down the auxiliary wheel AW by restoring force to the outside. As illustrated in FIG. 7, when the second pressing member 210 is a pressure control balloon, the auxiliary wheel AW may be lifted up and down by expanding and contracting in the vertical direction by adjusting the air pressure. Here too, the air pressure of the pressure control balloon can be used in the air tank provided in the vehicle.

One end of the chain 220 is coupled to the sliding shaft 140, and the other end is coupled to the lower bracket 180. When the sliding shaft 140 slides forward, the chain 220 pulls the lower bracket 180. On the contrary, when the sliding shaft 140 slides backward, the chain 220 pulls the lower bracket 180. Will be released.

As shown in FIG. 6, the gear part 230 includes a driven gear 231 which meshes with the chain 220 and rotates, and a central part which is fixed to the center of the driven gear 231 to rotate integrally with the driven gear 231. And a supporting member 233 having insertion holes 233a formed at both ends of the driven shaft 232 to allow the coaxial 232 and the driven shaft 232 to be rotatable. Here, the support member 233 is disposed so that the lower side is fixed to the upper surface of the upper bracket 150. Accordingly, the gear unit 230 is provided on the upper surface of the upper bracket 150.

In addition, the driven gear 231 is provided to correspond to the shape of the chain 220 is engaged and rotated. For example, as shown in FIG. 6, if the chain 220 is provided as a chain, the driven gear 231 may have a groove corresponding to the shape of the chain, and the chain 220 may have a circular shape around the chain 220. If provided with a formed chain, the driven gear 231 may be provided with a sprocket.

Further, the gear unit 230 provided on the upper surface of the upper bracket 150 induces the change of direction of the chain 220 to reduce the wear of the chain 220. Accordingly, the gear unit 230 and the chain 230 can be used semi-permanently.

As shown in FIG. 6, the gear unit 230 induces the change of direction of the chain 220 to 90 ° so as to switch from horizontal drive to vertical drive or from vertical drive to horizontal drive. In addition, since the chain 220 is provided to penetrate the upper and lower surfaces of the upper bracket 150, the chain 220 may be turned to 90 ° to be easily driven.

Towing vehicle auxiliary wheel lifting device according to an embodiment of the present invention and another embodiment of the present invention configured as described above operates as follows.

First, when the tow vehicle does not tow another vehicle, the boom (B) device for towing is folded up, and the auxiliary wheel (AW) mounted on the auxiliary shaft 160 does not need to be used. AW) must be up.

To this end, when pressure is applied to the first pressing member 130, the first pressing member 130 expands to the outside, and the sliding shaft 140 slides forward by the pressing of the first pressing member 130.

When the sliding shaft 140 slides forward, the chain 220 pulls the lower bracket 180. When the lower bracket 180 is pulled, the auxiliary shaft 160 is raised by the hinge action of the coupling member 170.

On the contrary, when the towing vehicle is towing another vehicle, the boom B device for the towing is lowered, and the auxiliary wheel AW must be used because the auxiliary wheel AW mounted on the auxiliary shaft 160 must be used. You must be on the ground.

To this end, if pressure is not applied to the first pressing member 130, the first pressing member 130 contracts, and the sliding shaft 140 slides backward by the contraction of the first pressing member 130.

When the sliding shaft 140 slides backward, the pressing force of the second pressing member 210 acts to naturally reduce the tensile force applied to the lower bracket 180 by the chain 220. When the tensile force on the lower bracket 180 is reduced, the auxiliary shaft 160 is lowered by the hinge action of the coupling member 170, so that the auxiliary wheel AW comes into contact with the ground.

When driving starts, the auxiliary wheel AW in contact with the ground distributes the weight of the towed vehicle while rolling in contact with the ground.

Thus, according to the embodiment of the present invention and another embodiment of the present invention, by providing the second pressing member 210 and the chain 220, it is possible to lift the auxiliary shaft 160 by only one first pressing member 130. There is a simple structure and economical. In addition, by providing the chain 220 and the gear unit 230, the auxiliary wheel can be easily lifted up and down, so that the wear of the chain 220 is less can be used semi-permanently. Further, the second pressing member can be applied to both the spring or the pressure control balloon, it is easy to change the production as needed.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of the present invention in order to facilitate the understanding of the present invention and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

110 ... rear shaft 120 ... fixed shaft
130 ... 1st pressure member 140 ... sliding shaft
150 ... upper bracket 160 ... secondary shaft
170 ... engagement member 180 ... lower bracket
210 ... 2nd pressure member 220 ... chain
230 ... gear

Claims (5)

A rear wheel shaft to which rear wheels of the tow vehicle are coupled at both ends;
A fixed shaft disposed above the rear wheel shaft;
A first pressing member coupled to the front of the fixed shaft and capable of pressing outward;
A sliding shaft disposed in front of the fixed shaft and coupled to the front of the first pressing member and slid back and forth by the expansion and contraction of the first pressing member;
An upper bracket coupled to the lower side of the fixed shaft;
An auxiliary shaft disposed at the rear of the rear wheel shaft and having auxiliary wheels of a towing vehicle coupled to both ends thereof;
A coupling member having one end fixedly coupled to the auxiliary shaft and the other end hingedly coupled to the rear wheel shaft;
A lower bracket coupled to the rear of the auxiliary shaft;
A second pressing member having both ends coupled to the upper bracket and the lower bracket and capable of being pressed outward;
A chain having one end coupled to the sliding shaft and the other end coupled to the lower bracket; And
Including a gear portion provided on the upper surface of the upper bracket to induce a change of direction of the chain,
The gear portion
A driven gear rotating in engagement with the chain,
A driven shaft having a central portion fixed to the center of the driven gear and rotating integrally with the driven gear;
Insertion holes for inserting both ends of the driven shaft is formed so that the driven shaft is rotatable, the lower side includes a pair of support members fixed to the upper surface of the upper bracket,
The first pressing member and the second pressing member, respectively
Towing vehicle auxiliary wheel lifting device, characterized in that the pressure control balloon that can be pressed outward by the air pressure control. delete delete delete The method according to claim 1,
Towing vehicle auxiliary wheel lifting device, characterized in that the upper bracket, the coupling member, the lower bracket, the second pressing member, the chain and the gear portion is provided with a pair, respectively.

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