KR20200144603A - Deck fixing apparatus for multi purpose utility vehicle - Google Patents

Abstract

A deck fixing device of a multipurpose work vehicle according to the present invention comprises: a main frame constituting a vehicle body; a deck for loading cargo; a deck support frame disposed in an upper portion of the main frame to support the deck; a damping cylinder of which one side is coupled to a hinge shaft of a first cylinder configured in the deck support frame and the other side is coupled to a second cylinder hinge shaft configured in a lower surface portion of the deck; and a cylinder fixing means coupled to be rotatable around the second cylinder hinge shaft and having a shape of surrounding a piston rod of the damping cylinder. The device prevents descending of the deck when hydraulic pressure is leaked even if the existing hydraulic cylinder is used.

Description

Deck fixing apparatus for multi-purpose utility vehicle

The present invention relates to a deck fixing device for a vehicle, and relates to a deck fixing device capable of preventing the cylinder from unintentionally descending due to leakage of hydraulic pressure from a hydraulic cylinder during a deck lifting operation.

Small multi-purpose work vehicles, utility vehicles, and UTVs) have been widely used recently in a wide range of fields such as distribution, construction, leisure, and industrial use.

In particular, it is structurally advantageous for rough road driving, and is mainly used as a transportation means for loading and transporting soil or crops at construction sites or agricultural sites, or for loading and carrying tools necessary for various tasks.

In order to function as a means of transport, multi-purpose work vehicles are equipped with a loading box (deck), and for quick unloading of loads loaded in the loading box, the loading box is tilted backwards within a limited angular range based on the hinge at the rear of the vehicle like a dump vehicle The loading box is composed of a damping type structure that can be restored to the horizontal state again.

In the case of the loading box (hereinafter, simply referred to as "deck"), it is lifted or returned to its original position by using a hydraulic cylinder whose length varies according to the hydraulic pressure.

However, depending on the amount of storage, there are cases where the hydraulic pressure of the hydraulic cylinder is leaked or the hydraulic pressure is leaked due to various reasons such as the aging of the hydraulic cylinder.In this case, accidents such as the deck unintentionally descending while the deck is lifted There is room for it to happen.

The present invention proposes a deck fixing device capable of stably raising and lowering the deck, and in particular, an attempt to propose a device capable of preventing the deck from descending even when hydraulic leakage occurs even when an existing hydraulic cylinder is used.

A deck fixing device for a multipurpose work vehicle of the present invention includes a main frame constituting a vehicle body, a deck capable of loading cargo, and a deck support frame disposed above the main frame to support the deck. A vehicle deck fixing device, wherein one side is coupled to a first cylinder hinge shaft configured on the deck support frame, and the other side is coupled to a second cylinder hinge shaft configured on a lower surface of the deck, and the second cylinder hinge It is coupled to be rotatable about an axis, and includes a cylinder fixing means formed in a shape surrounding the piston rod of the damping cylinder.

According to an embodiment of the present invention, the load of the deck is not supported only on one side, but is directly in close contact with the hydraulic damping cylinder so that the piston rod is not forcibly reduced, thereby enabling stable support of the deck.

Since such a cylinder fixing means can be additionally installed on a working vehicle in which a hydraulic damping cylinder is already mounted, the manufacturing cost thereof is low and installation is easy.

1 is a view showing a multi-purpose working vehicle for construction and snow removal work according to an embodiment of the present invention.
2 is a view for explaining a deck of a multi-purpose working vehicle according to an embodiment of the present invention.
3 is a view showing a case where a deck fixing bar is used to fix the deck of a multipurpose work vehicle.
4 is a view showing the overall configuration of a deck fixing device according to an embodiment of the present invention.
5 is a view showing a state in which the cylinder fixing means of this embodiment is fixed to the lower surface of the deck.
6 is a view showing a state in which the cylinder fixing means of this embodiment is in close contact with the piston rod of the damping cylinder.
7 is a view showing a case of fixing the cylinder fixing means to the lower surface of the deck using a fixing pin according to the present embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, a detailed description of known configurations and configurations that may unnecessarily obscure the subject matter of the invention will be omitted.

1 is a view showing a multi-purpose work vehicle for construction and snow removal work according to an embodiment of the present invention, Figure 2 is a view for explaining the deck of the multi-purpose work vehicle according to an embodiment of the present invention.

1 and 2, a driver's seat 110 in which a driver and a passenger can ride is provided in the center of the multipurpose work vehicle according to the invention. The driver's seat 110 is provided with a seat 115 for seating, and in front of the seat 115, various operating devices related to driving operation, including steering for steering a wheel, are installed.

The engine mounted in the engine room 160 below the seat 115 outputs power for driving the vehicle, and an open deck 120 capable of loading cargo is installed behind the driver's seat 110. The deck 120 is disposed on the deck support frame 135 supported by the main frame 130 above the main frame 130 constituting the vehicle body.

Specifically, the deck 120 is hinged (H) to the end of the deck support frame 135 and has a dump function using this as a pivot point. That is, the deck 120 may be tilted backward or returned to a horizontal state within a limited angle range, and accordingly, when a load such as soil or gravel is loaded on the deck 120, the deck 120 is tilted backward and poured onto the floor. You can get off.

The dump function of the deck 120 is supported by a vehicle body frame under the loading box 120, and a hydraulic damping cylinder 125 whose length is variable using hydraulic pressure is coupled to the lower surface of the deck 20.

A buffer unit 140 may be installed on the deck support frame 135 that comes into contact with the lower surface of the deck 120 in a horizontal state (a state placed parallel to the ground). The buffer unit 140 supports the deck 120 with respect to the deck support frame 135 so as to be able to buffer, thereby preventing vibration transmitted through the vehicle body due to resonance during engine operation or irregular road surfaces during driving and noise. .

As shown in FIG. 2, the auxiliary device of the hydraulic damping cylinder 125 to allow the deck 120 to be inclined to be dumped or to be lowered horizontally so as to contact the deck support frame 135 is shown in the drawings. It will be described in detail together, however, a case in which an existing deck fixing bar is used in order to compare the deck fixing means of this embodiment with the existing fixing bar will be shown.

3 is a view showing a case where a deck fixing bar is used to fix the deck of a multipurpose work vehicle.

As shown in Figure 3, the deck 120 is in a lifted state, that is, in the dumping state, in case the hydraulic pressure of the hydraulic damping cylinder 125 is lost, the deck support frame 135 and the deck 120 The deck fixing bar 150 may be further configured to support it.

In this case, the user puts the deck 120 in a dumping state, and then connects/fixes one end of the deck fixing bar 150 to the deck support frame 135 to the deck support frame 135, which is configured to be hingedly rotated at the bottom of the deck 120. The deck fixing bar 150 may be hingedly rotated at the deck support frame 135 or hingedly rotated at the lower surface of the deck 120, and the free end of the deck fixing bar 150 is fixed to the lower surface of the deck. Alternatively, when it is fixed to the deck support frame 135, it is possible to suppress an unintended lowering of the deck 120 by the deck fixing bar 150.

However, in the case of such a configuration, the deck fixing bar 150 is insufficient to sufficiently bear the load of the deck 120 and the load accommodated therein, and the user unintentionally touches the deck fixing bar 150 The support may be released by this. In addition, since the deck fixing bar 150 is configured to support one side other than the center of the deck 120, there is a problem that the load to be borne by the deck fixing bar 150 is very high.

In order to solve this structural problem, the present invention proposes a fixing means that prevents the deck 120 from descending even if the hydraulic pressure of the hydraulic damping cylinder 125 leaks.

Figure 4 is a view showing the overall configuration of the deck fixing device according to an embodiment of the present invention, Figure 5 is a view showing a state in which the cylinder fixing means of this embodiment is fixed to the lower surface of the deck, Figure 6 is a cylinder of this embodiment It is a view showing a state in which the fixing means is in close contact with the piston rod of the damping cylinder.

4 to 6, the deck fixing device of the embodiment comprises a cylinder fixing means 200 configured to be hingedly rotatable while being connected to one side of the hydraulic damping cylinder 125, and when the cylinder fixing means 200 is a deck It includes a fixing rod 210 that is operated to be fixed to the part 121 or to be released from the fixing.

One side of the hydraulic damping cylinder 125 is coupled to the first cylinder hinge shaft 126 configured on the deck support frame, and the other side is coupled to the second cylinder hinge shaft 127 configured on the deck 120. In addition, the hydraulic damping cylinder 125 is moved outward from the cylinder body 125a or inside the cylinder body according to the cylinder body 125a into which hydraulic pressure is injected and the hydraulic pressure injected into the cylinder body 125a. It includes a piston rod (125b) that is exposed to varying length.

The cylinder body (125a) of the hydraulic damping cylinder (125) is coupled to the first cylinder hinge shaft (126), and the piston rod (125b) of the hydraulic damping cylinder (125) is attached to the second cylinder hinge shaft (127). Are combined. Accordingly, the deck 120 is lifted or lowered again according to a change in the length of the piston rod 125b.

As described above, although the hydraulic pressure is maintained so that the lifted state of the deck 120 must be maintained, the hydraulic pressure of the cylinder leaks unintentionally, such as when the hydraulic pressure of the cylinder is leaked, resulting in the descending of the deck 120. In this case, big problems can arise.

To this end, the lower surface portion 121 of the deck 120 is configured to be detachably attached and fixed to the piston rod 125, so that the length of the piston rod 125b is not changed. Means 200 are configured.

One side of the cylinder fixing means 200 is coupled to the second cylinder hinge shaft 127 to be hingedly rotatable, and the other side is fixed by a fixing rod 210 configured on the lower surface of the deck 121 Can be.

In particular, the cylinder fixing means 200 is made in a shape that can wrap the piston rod (125b), for example, a "c" or "C" shape when in close contact with the piston rod (125b) The piston rod (125b) is configured to be accommodated inside the cylinder fixing means (200).

One side of the cylinder fixing means 200 is coupled to the second cylinder hinge shaft 127 to which the piston rod 125b is coupled, and rotates around the second cylinder hinge shaft 127. In addition, the other side of the cylinder fixing means 200 is configured with a rod through groove 201 for inserting the piston rod 125b.

In order to prevent the case where the piston rod 125b is inserted into the cylinder body 125a without bearing the load of the deck 120 due to various reasons such as hydraulic leakage, the cylinder fixing means 200 is a cylinder It serves as a support that can maintain the distance between the upper portion of the body (125a) and the second cylinder hinge shaft 127.

The fixing rod 210 is configured to fix the other side of the cylinder fixing means 200 to the lower surface of the deck 121, and the fixing rod 210 is a fixing hole formed in the cylinder fixing means 200 (not shown). It is coupled to the lower surface portion 121 of the deck by passing through), and the user may separate or couple the fixing rod 210 as necessary.

As shown in FIGS. 5 and 6, the fixing rod 210 is a bolt type, and the user rotates the fixing rod 210 to be coupled to or separated from the deck lower surface 121, as shown in FIG. 7. It is also possible to be configured with the same fixing pin type.

7 is a view showing a case in which the cylinder fixing means is fixed to the lower surface of the deck using a fixing pin according to the present embodiment.

In a state in which the deck 120 is horizontally positioned on the working vehicle, the cylinder fixing means 200 should be fixed to the lower surface of the deck 121, for this purpose, a rotatable fixing pin 310 instead of the preceding fixing rod It is possible to attach and detach the cylinder fixing means 200 through.

The fixing pin 310 is configured to be rotatable while protruding at a fixed height from the lower surface of the deck 121, and has a shape corresponding to the shape of the fixing pin so that it can pass only at a specific position of the fixing pin 310. A pin through hole 220 may be formed in the cylinder fixing means 200.

In this case, when the user wants to maintain the length of the piston rod 125b by using the cylinder fixing means 200, the cylinder fixing means by rotating the fixing pin 310 to pass through the pin through hole 220 200 may be separated from the lower surface portion 121 of the deck.

In addition to these embodiments, a protrusion or a concave portion is formed in the cylinder fixing means 200 facing the deck lower surface 121, and the deck lower surface 121 is forcibly fitted to the protrusion or concave portion. It will be said that it is also possible to construct a concave portion or a protrusion portion having a shape that is formed.

According to the embodiment of the present invention as described above, the load of the deck is not supported only on one side, but is directly in close contact with the hydraulic damping cylinder so that the piston rod is not forcibly reduced, thereby enabling stable support of the deck.

Since such a cylinder fixing means can be additionally installed on a working vehicle in which a hydraulic damping cylinder is already mounted, the manufacturing cost thereof is low and installation is easy.

Claims (5)

A deck fixing device for a multi-purpose work vehicle comprising a main frame constituting a vehicle body, a deck capable of loading cargo, and a deck support frame disposed above the main frame to support the deck,
A damping cylinder having one side coupled to the first cylinder hinge shaft configured on the deck support frame, and the other side coupled to the second cylinder hinge shaft configured on the lower surface of the deck,
A deck fixing device for a multipurpose work vehicle comprising a cylinder fixing means coupled to be rotatable about the second cylinder hinge axis and surrounding the piston rod of the damping cylinder. The method of claim 1,
A deck fixing device for a multipurpose work vehicle, wherein a rod passage groove through which a part of the piston rod of the damping cylinder can pass is formed at an end of the cylinder fixing means. The method of claim 1,
A deck fixing device for a multipurpose work vehicle, characterized in that a fixing rod or a fixing pin passing through the cylinder fixing means is configured on a lower surface of the deck to fix the position of the cylinder fixing means. The method of claim 1,
A protrusion protruding a predetermined thickness or a concave recessed in a predetermined depth is formed on the lower surface of the deck to fix the position of the cylinder fixing means, and a concave or protrusion corresponding to the protrusion or the concave portion is formed in the cylinder fixing means. A deck fixing device for a multi-purpose work vehicle, characterized in that. The method of claim 1,
In the damping cylinder, a cylinder body side to which hydraulic pressure is injected is coupled to the first cylinder hinge shaft, and a piston rod whose length exposed from the cylinder body is variable according to the hydraulic pressure injected into the cylinder body is the second cylinder hinge shaft A deck fixing device of a multi-purpose work vehicle, characterized in that coupled to the.

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