KR20160114231A - Stretch the legs of the cargo lifting devices for vehicle - Google Patents

Stretch the legs of the cargo lifting devices for vehicle Download PDF

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Publication number
KR20160114231A
KR20160114231A KR1020150040173A KR20150040173A KR20160114231A KR 20160114231 A KR20160114231 A KR 20160114231A KR 1020150040173 A KR1020150040173 A KR 1020150040173A KR 20150040173 A KR20150040173 A KR 20150040173A KR 20160114231 A KR20160114231 A KR 20160114231A
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KR
South Korea
Prior art keywords
leg
screw
nut bushing
bushing
outer leg
Prior art date
Application number
KR1020150040173A
Other languages
Korean (ko)
Inventor
염승철
김선희
Original Assignee
주식회사 세안이노텍
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Publication date
Application filed by 주식회사 세안이노텍 filed Critical 주식회사 세안이노텍
Priority to KR1020150040173A priority Critical patent/KR20160114231A/en
Publication of KR20160114231A publication Critical patent/KR20160114231A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
    • B60P1/02—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with parallel up-and-down movement of load supporting or containing element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
    • B60P1/64—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading the load supporting or containing element being readily removable
    • B60P1/6418—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading the load supporting or containing element being readily removable the load-transporting element being a container or similar
    • B60P1/6445—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading the load supporting or containing element being readily removable the load-transporting element being a container or similar the load-transporting element being shifted only vertically

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

A telescopic leg of a vehicle-mounted freight lift device is disclosed.
The expansion and contraction leg of the vehicle-mounted cargo lifting device is provided with: a vertical outer leg provided on each corner of the main frame; And an elastic member for automatically sliding the outer leg, wherein the elastic member is installed inside the outer leg, and the driving motor is provided with a driving motor A screw shaft rotated by the screw shaft; An upper nut bushing having an inner first threaded portion engaged on the screw shaft while being fastened and fixed to the inner upper side of the inner leg by a screw; A cylindrical screw housing disposed at a lower portion of the upper nut bushing; And a lower nut bushing disposed at a lower portion of the screw housing and fastened and fixed to an inner lower side of the inner leg by a screw and having a second female screw portion at a central portion thereof.

Description

Technical Field [0001] The present invention relates to a stretch leg of a cargo lifting device for a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted cargo lifting device, and more particularly to a telescopic leg for lifting and lowering a lifting device.

The configuration of the on-board cargo lifting device is described in Patent Registration No. 10-1451388 filed by the present applicant.

A brief description of this is as follows. A cargo lifting device for a vehicle (hereinafter abbreviated as "lifting device") can easily load or unload heavy cargo or bulky cargo into a cargo cargo ship without a forklift or manpower mobilization To be installed on the machine.

As shown in FIGS. 1 and 2, the lifting device includes a main frame 10 having a loading space for accommodating heavy cargo therein and having at least one door, And the main frame 10 and the folding frame 11 are mounted on the ends of the respective folding frames 11 to support the main frame 10 while vertically expanding and contracting the main frame 10 and the folding frame 11 Includes a stretching leg (20).

3, the telescopic leg 20 includes a vertical outer leg 21 coupled to a distal end of the foldable frame 11 and a vertical outer leg 21 which is slidable in the vertical direction within the outer leg 21 A vertical inner leg 22 to be installed, and a stretchable member 23 for automatically sliding the inner leg 22.

The elastic member 23 includes a driving motor 23a mounted on the upper portion of the outer leg 21 and a screw shaft 23a provided in the outer leg 21 and rotated by the driving motor 23a. A clutch 23c connected between the drive motor 23a and the screw shaft 23b and connected to the screw shaft 23b integrally on the upper side of the inner leg 22, A bushing holder 23e in the form of a pipe connected to the lower end of the upper nut bushing 23d and a lower bushing holder 23e which is movable up and down in accordance with the rotation of the shaft 23b, A lower nut bushing 23f engaged with the lower nut bushing 23f and a height adjuster 23g screwed to the lower end inner peripheral surface of the bushing holder 23e.

The upper nut bushing 23d is welded to the upper ends of the inner leg 22 and the bushing holder 23e and the lower nut bushing 23f is fastened to the lower ends of the inner leg 22 and the bushing holder 23e. As shown in Fig.

However, the upper nut bushing 23d and the lower nut bushing 23f bear the entire weight of the lifting device, and when a load is loaded on the lifting device, a larger load acts on the lifting device, However, in reality, welding can not support the welding, and the problem of breakage occurs. As a result, safety problems are being raised.

In addition, since the welded portions of the upper nut bushing 23d and the lower nut bushing 23f are located inside the inner leg 22, the welding operation is not easy and the welded portions may be welded poorly, Therefore, a countermeasure against this problem is required.

Patent Document 1: Korean Patent No. 10-1451388

The present invention provides a telescopic leg of a vehicle-mounted freight lift device that is rigidly fastened to each nut bushing and an inner leg by a screw (or bolt) so as to withstand a high load applied to each nut bushing, There is a purpose.

Another object of the present invention is to provide a telescopic leg of a vehicle-mounted freight lift device which can improve the productivity of a product by simplifying the engagement of each nut bushing.

The above-described object is achieved by a telescopic leg for vertically lifting a vehicle-mounted cargo lifting device, wherein the telescopic leg comprises: a vertical outer leg provided on each corner of the main frame; And an elastic member for automatically sliding the outer leg, wherein the elastic member is installed inside the outer leg, and the driving motor is provided with a driving motor A screw shaft rotated by the screw shaft; An upper nut bushing having an inner first threaded portion engaged on the screw shaft while being fastened and fixed to the inner upper side of the inner leg by a screw; A cylindrical screw housing disposed at a lower portion of the upper nut bushing; And a lower nut bushing disposed at a lower portion of the screw housing and fastened and fixed to an inner lower side of the inner leg by a screw and having a second female screw portion at a central portion thereof. Lt; / RTI >

The lower nut bushing may further include upper and lower insertion grooves formed in the lower inner circumferential surface of the upper nut bushing and the upper inner circumferential surface of the lower nut bushing, respectively, into which the upper and lower ends of the screw housing are inserted, respectively.

The upper nut bushing may further include a lubricant hole communicating with the inside thereof.

According to the present invention, by fastening the inner legs and the respective nut bushings located therein by screws (bolts), it is possible to enhance the bonding strength and the bonding reliability compared with the conventional bonding structure, and the bonding process is simplified It is possible to reduce the number of bonding holes, thereby assuring ease of bonding process and increasing productivity.

Fig. 1 is an overall configuration view of a vehicle-mounted freight lift device. Fig.
Fig. 2 is an overall configuration view of a vehicle-mounted freight lift device. Fig.
3 is a longitudinal sectional view showing the configuration of a conventional elastic member
4 is an exploded perspective view of a telescopic leg according to the present invention.
5 is a cross-sectional view of a telescopic leg according to the present invention,
6 is a cross-sectional view of a telescopic leg according to the present invention in an assembled state,

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms as used herein include plural forms as long as the phrases do not expressly express the opposite meaning thereto. Means that a particular feature, region, integer, step, operation, element and / or component is specified, and that other specific features, regions, integers, steps, operations, elements, components, and / And the like.

Unless otherwise defined, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Commonly used predefined terms are further interpreted as having a meaning consistent with the relevant technical literature and the present disclosure, and are not to be construed as ideal or very formal meanings unless defined otherwise.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 4 is an exploded perspective view of a telescopic leg according to the present invention, FIG. 5 is an assembled state of the telescopic leg according to the present invention, in which the legs are folded, FIG. 6 is an assembled state of the telescopic legs according to the present invention, It is the state that the leg is unfolded.

The telescopic leg according to the present invention is applied to the on-board cargo lifting device specified in the registration number 10-1451388 of the present applicant. The on-board cargo lifting device will be omitted from the description of the present invention.

The stretch leg 100 applied to the on-vehicle cargo lifting device includes an outer leg 110, an inner leg 120, and a stretchable member 130.

The outer leg 110 is fixed to a folding frame 11 (shown in Figs. 1 and 2) which is foldably installed on the main frame 10 (shown in Figs. 1 and 2) of the above-mentioned cargo lifting device for on- , And a square pipe shape. 1 and 2) and the driving motor 23a to transmit the rotation power of the driving motor to the screw shaft, which will be described later, A clutch 23c (shown in Figs. 1 and 2) is provided.

Meanwhile, each edge of the outer leg 110 is preferably chamfered for strength reinforcement.

The inner leg 120 is inserted into the lower side of the outer leg 110 so that the outer leg 110 moves up and down with respect to the inner leg 120 to expand and contract the length of the telescopic leg 100.

The inner leg 120 has a rectangular pipe shape smaller than the diameter of the outer leg 110.

The upper and lower sides of the inner leg 120 are formed with fastening holes 121 for fastening the screws s and lubricating oil such as grease and anti- A lubricant oil injection hole 122 is formed.

In addition, the inner leg 120 may be chamfered to reinforce the outer leg 110, such as the outer leg 110.

The elastic member 130 automatically moves the outer leg 110 up and down with respect to the inner leg 120 and includes a screw shaft 131, an upper nut bushing 132, a screw housing 133, , And a lower nut bushing (134).

The screw shaft 131 is installed inside the outer leg 110 and is rotated by the driving motor 23a.

The upper nut bushing 132 is fastened and fixed to the inner upper side of the inner leg by a screw s and a first internal threaded portion 132a is formed inside the center of the upper nut bushing 132, .

In accordance with such a coupling structure, the screw shaft 131 is rotated with respect to the upper nut bushing 132 and moved up and down linearly.

Particularly, since the upper nut bushing 132 supports the entire lifting device, the coupling strength with the inner leg 120 must be strong. In the present invention, the inner leg 120 and the upper nut bushing 132 are screwed since the upper nut bushing 132 can be properly coupled to the correct position, it is possible to accurately engage with the screw shaft 131, Cracking can prevent problems.

Here, the reference numeral 132b is a relative fastening hole that coincides with the fastening hole 121 on the upper side of the inner leg 120.

An upper insertion groove 132c is formed at a lower center portion of the upper nut bushing 132 so that the upper end of the screw housing 133 is fitted into the upper insertion groove 132c to support the upper portion of the screw housing 133.

A lubricating oil injection hole 122 of the inner leg 120 and a lubricating hole 132d communicating with the inner lubricating oil injection hole 122 may be formed on one side of the upper nut bushing 132. The lubricating hole 132d serves as an inlet for injecting lubricant such as grease onto the sliding portion of the upper nut bushing 132 and the screw shaft 131. [

The screw housing 133 serves to prevent the screw shaft 131 from being deviated when the screw shaft 131 linearly moves, and has a circular pipe shape.

The lower nut bushing 134 is for fastening the height adjusting support 140 disposed at the lower portion of the inner leg 120. The lower nut bushing 134 is fastened and fixed to the inner lower portion of the inner leg 120 by screws And a second female threaded portion 134a is formed at the center thereof to engage the outer circumferential surface of the threaded shaft of the elevation adjusting support shaft 140. [

Since the lower nut bushing 134 also supports the entire lifting device, the inner leg 120 and the lower nut bushing 134 must be firmly coupled to the inner leg 120. In the present invention, since the lower nut bushing 134 can be properly coupled to the correct position by tightly connecting the lower nut bushing 134 with the support bracket 140, This clogging problem can be prevented.

And the reference numeral 134b is a relative fastening hole coinciding with the lower side fastening hole 121 of the inner leg 120. [

A lower insertion groove 134c is formed at an upper center portion of the lower nut bushing 134 so that a lower end of the screw housing 133 is fitted to the lower nut bushing 134 to support the lower portion of the screw housing 133.

The expansion and contraction legs of the vehicle-mounted freight lift device of the present invention having the above-described structure can reliably improve the coupling structure of the respective nut bushings, thereby achieving accurate coupling with the screw shaft and preventing the detachment of the nut bushing due to high load And has several advantages that can be improved by the simplified joining operation compared with the conventional one.

In addition, since the screw housing is fitted to each bushing, not the welding, the assembling property is also improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof,

It is obvious that the present invention is not limited thereto and that variations and modifications can be made by those skilled in the art within the technical scope of the present invention.

It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

100: stretch leg 110: outer leg
120: inner leg 130: elastic member
131: screw shaft 132: upper nut bushing
133: screw housing 134: lower nut bushing

Claims (3)

A telescopic leg for lifting up a car-mounted cargo lifting device, comprising:
The telescopic leg
A vertical outer leg provided on each corner of the main frame; A vertical inner leg which is installed in the outer leg so as to be slidable in the vertical direction, and a stretching member which automatically slides the outer leg,
Wherein the elastic member comprises: a screw shaft rotatable by a driving motor while being installed in the outer leg; An upper nut bushing having an inner first threaded portion engaged on the screw shaft while being fastened and fixed to the inner upper side of the inner leg by a screw; A cylindrical screw housing disposed at a lower portion of the upper nut bushing; And a lower nut bushing disposed at a lower portion of the screw housing and fastened and fixed to an inner lower side of the inner leg by a screw and having a second female screw portion at a central portion thereof. .
The method according to claim 1,
Further comprising upper and lower insertion grooves formed on the lower inner circumferential surface of the upper nut bushing and the upper inner circumferential surface of the lower nut bushing to respectively insert upper and lower ends of the screw housing.
The method according to claim 1,
Further comprising a lubricating hole formed in the upper nut bushing so as to communicate with the interior of the upper nut bushing.
KR1020150040173A 2015-03-23 2015-03-23 Stretch the legs of the cargo lifting devices for vehicle KR20160114231A (en)

Priority Applications (1)

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KR1020150040173A KR20160114231A (en) 2015-03-23 2015-03-23 Stretch the legs of the cargo lifting devices for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150040173A KR20160114231A (en) 2015-03-23 2015-03-23 Stretch the legs of the cargo lifting devices for vehicle

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KR20160114231A true KR20160114231A (en) 2016-10-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107650882A (en) * 2017-10-30 2018-02-02 扬州统机械有限公司 A kind of Pneumatic support device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101451388B1 (en) 2013-10-25 2014-10-22 영광군 Loading and get off lift apparatus for freight car

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101451388B1 (en) 2013-10-25 2014-10-22 영광군 Loading and get off lift apparatus for freight car

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107650882A (en) * 2017-10-30 2018-02-02 扬州统机械有限公司 A kind of Pneumatic support device

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