CN102328889B - Lifting device of platform truck - Google Patents
Lifting device of platform truck Download PDFInfo
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- CN102328889B CN102328889B CN201010227540.5A CN201010227540A CN102328889B CN 102328889 B CN102328889 B CN 102328889B CN 201010227540 A CN201010227540 A CN 201010227540A CN 102328889 B CN102328889 B CN 102328889B
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- roller
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- platform
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- 230000008602 contraction Effects 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 241001310793 Podium Species 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
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Abstract
The invention discloses a lifting device of a platform truck. The lifting device comprises an underframe and a lifting fork frame, wherein the lifting fork frame is arranged on the underframe, is of a scissors fork structure and comprises a first fork branch assembly and a second fork branch assembly; the first fork branch assembly and the second fork branch assembly are mutually hinged together at the respective middle parts; two ends of the first fork branch assembly and the second fork branch assembly are respectively provided with a roller; when the lifting fork frame is in a complete contraction state, the rotating center of the roller at the rear end of the first fork branch assembly is higher than the rotating center of the roller at the front end of the second fork branch assembly by a first height in the vertical direction; when the lifting fork frame is in a complete opening state, the rotating center of the roller at the rear end of the first fork branch assembly is higher than the rotating center of the roller at the front end of the second fork branch assembly by a second height in the vertical direction; and the second height is more than the first height. By arranging the lifting device on the transportation platform truck, a platform can effectively resist sags caused by a cantilever beam arm during cargo carrying while being lifted, so that the platform can be kept in a relative horizontal state.
Description
Technical field
The present invention relates to a kind of platform truck, particularly a kind of jacking system of platform truck.
Background technology
On airport, platform truck is used for to aircraft transmissions goods, and the jacking system of platform truck adopts scissors fork structure to realize conventionally.At platform during in extreme lower position, ensure platform level, and cylinder upper level rear, left and right portion will be lower than 508mm, to can realize from three directions and wayside equipment the transmission of freight container, platform raise and with the process of front platform interlock in, ensure that platform is anterior identical with front podium level, so that freight container transmits between forward and backward platform.Conventionally platform keeps the horizontal oscilaltion of platform by carriage mechanism.In the time that platform raises, the strong point that crotch is positioned at platform rear portion can move forward, and makes terrace part unsettled at rear support point rear portion, forms cantilever mechanism.If now by freight container in the past platform be transferred to rear platform, bracketed part is stressed and form larger amount of deflection, thereby affected the strength and stiffness of rear platform and scissors crotch.
In prior art, to be the track below platform by change in order addressing this problem, orbital plane to be tilted in short transverse, carry out implementation platform level in the time of low level, in the time of a high position, the stressed of platform and scissors crotch, higher than front portion, improved in rear portion in the situation that of practical function.But this spline structure needs welded rails again, realizes more complicated.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiency that above-mentioned prior art exists, a kind of jacking system of shipping platform car is provided, this jacking system can effectively be resisted the winding degree letting droop that goods produces shipping platform cantilever, makes platform keep the state of a relative level.
For solving the problems of the technologies described above, the invention provides a kind of platform truck jacking system, comprise that a underframe and is arranged on the lifting crotch of the scissors fork structure on this underframe, this lifting crotch is included in the first fork branch assembly and the second fork branch assembly that middle part is separately hinged together, front end of this first fork branch assembly is hinged on the position of forward end of this underframe by roller, rear end be can lifting free end, the rear end of this second fork branch assembly by roller be slidably disposed on this underframe by the slide rail of rear end, front end be can lifting free end, the rear end of this first fork branch assembly can jointly be connected a platform and be driven this lifting platform by roller by the front end of roller and this second fork branch assembly, when this lifting crotch is during in complete contraction state, the centre of gration of the rear end roller of this first fork branch assembly will exceed one first height compared with the centre of gration in the vertical direction of the front end roller of the second fork branch assembly, when this lifting crotch is during in complete open configuration, the centre of gration of the rear end roller of this first fork branch assembly will exceed one second height compared with the centre of gration in the vertical direction of the front end roller of the second fork branch assembly, this second be highly greater than this first height, and when this lifting crotch from complete contraction state in complete open configuration change procedure, the height that the centre of gration of the rear end roller of this first fork branch assembly exceeds at vertical direction compared with the centre of gration of the front end roller of the second fork branch assembly is to be greater than this first height and to be less than this second height.
Described platform truck jacking system, wherein: this first fork branch assembly comprises fork branch in two and is arranged on the roller at each interior fork branch two ends, this the second fork branch assembly comprises two outer fork branches and is arranged on the roller at each outer fork branch two ends, in these two, fork branch is arranged on the inner side of these two outer fork branches accordingly, and adjacent outer fork branch and interior fork are together with middle part is separately hinged.
Described platform truck jacking system, wherein: this first fork branch assembly also comprises the second transverse axis between the front end that is connected to fork branch in these two and the 3rd transverse axis between rear end, the roller at described interior fork branch two ends accordingly, can be rotatably set in the two ends of this second transverse axis and the 3rd transverse axis, the roller that is arranged on described the second transverse axis two ends is defined as to the second roller, the roller that is arranged on the 3rd transverse axis two ends is defined as to the 3rd roller; This second fork branch assembly also comprises the first transverse axis between the front end that is connected to these two outer fork branches and the 4th transverse axis between rear end, the roller at described outer fork branch two ends accordingly, can be rotatably set in the two ends of this first transverse axis and the 4th transverse axis, the roller that is arranged on described the first transverse axis two ends is defined as to the first roller, the roller that is arranged on the 4th transverse axis two ends is defined as to the 4th roller.
Described platform truck jacking system, wherein: the height of the 3rd roller is higher than the height of the first roller, and plane of revolution one setpoint distance of two interior fork branches is arranged to upwards depart from the axle center of the 3rd roller.
Described platform truck jacking system, wherein: described first, second, third, fourth transverse axis all coaxially arranges with its upper roller, the height of described the 3rd transverse axis is higher than the height of described the first transverse axis, and the axis of described the 3rd transverse axis upwards departs from plane of revolution one setpoint distance of two interior fork branches.
Described platform truck jacking system, wherein: this first is highly 10-30mm; This second is highly 25-45mm.
Described platform truck jacking system, wherein: this first is highly 20 millimeters.
Described platform truck jacking system, wherein: this second is highly 35 millimeters.
For solving the problems of the technologies described above, the present invention also provides a kind of platform truck, comprises a front platform and one and the rear platform that arranges of this front platform split, also comprises that one can drive the above-mentioned platform truck jacking system of this rear platform lifting.
Described platform truck, wherein, roller and this rear platform sliding block joint of the rear end of this first fork branch assembly, roller and this rear platform of the front end of this second fork branch assembly are hinged.
Useful technique effect of the present invention is: this jacking system is by being arranged on the position of upwards departing from its plane of revolution by the roller that is arranged on rear platform cantilever below, make rear platform in raising, rear end height is higher than front end height, thereby effectively offset the winding degree that cantilever lets droop under goods effect, made platform keep the state of a relative level.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.Wherein:
Fig. 1 is that platform truck jacking system of the present invention is installed to the schematic diagram on platform truck;
Fig. 2 is platform truck jacking system schematic top plan view of the present invention;
Master when Fig. 3 is platform truck jacking system rise of the present invention looks schematic diagram;
Fig. 4 is the D portion enlarged diagram of Fig. 3;
Fig. 5 is that the master that platform truck jacking system of the present invention drops to extreme lower position looks schematic diagram;
Fig. 6 is that platform truck jacking system of the present invention is raised to the position relationship contrast schematic diagram of most significant bit when dropping to lowest order;
Fig. 7 is the schematic diagram of platform truck jacking system of the present invention.
Detailed description of the invention
As shown in Figure 1, platform truck 10 of the present invention comprises: front platform 1, the crotch that is arranged on front platform 1 below, rear platform 2, the jacking system 3 that is arranged on rear platform 2 belows and rear platform underframe 4.Forward and backward platform 1,2 split settings, install operator's compartment on front platform 1, and it realizes lifting by crotch, and rear platform 2 is for transmitting goods, and it realizes lifting by jacking system 3.
In conjunction with consulting Fig. 1, Fig. 2, jacking system 3 is included in the first fork branch assembly (52,62,63,32,33) and the second fork branch assembly (51,61,64,31,34) that middle part is separately hinged together.The first fork branch assembly comprises two interior the second transverse axis 62 of pitching branch 52, be arranged on two interior fork branch 52 front ends, is arranged on the 3rd transverse axis 63 of two interior fork 52 rear end, can be rotatably set in second roller 32 at the second transverse axis 62 two ends and can be rotatably set in the 3rd roller 33 at the 3rd transverse axis 63 two ends.The second fork branch assembly comprises two outer the first transverse axis 61 of pitching branch 51, be arranged on two outer fork branch 51 front ends, is arranged on the 4th transverse axis 64 of two outer fork 51 rear end, can be rotatably set in first roller 31 at the first transverse axis 61 two ends and can be rotatably set in the 4th roller 34 at the 4th transverse axis two ends.This two interior fork branch 52 is arranged on the inner sides of two outer fork branches 51 accordingly, and adjacent outer fork branch 51 and interior fork 52 is together with middle part is separately hinged by a jointed shaft 35.The first roller 31 is connected with the bottom-hinged of the front end of rear platform 2, the second roller 32 is articulated and connected with the front end of rear platform underframe 4, the 3rd roller 33 is arranged on the bottom of rear platform 2 rear ends and can slides with respect to rear platform 2, the 4th roller 34 be arranged on rear platform underframe 4 by rear end can be with respect to underframe 4 upper surface slide.Rear platform 2 is respectively arranged with by bottom and the underframe 4 of rear end the slide rail that supplies the 3rd roller 33 and the 4th roller 34 to slide by the upper surface of rear end.This jacking system 3 is in uphill process, and the 4th roller 34 can move to A ' point from the A point of rear platform underframe 4, and the 3rd roller 33 can move to B ' point from B point.In the time that lifting crotch 3 is raised to most significant bit, the B of rear platform 2 has formed overarm arm to B '.
Obviously, this jacking system 3 also should comprise the driver element that a driving inner and outer fork branch 51,52 is folding and launch, and this driver element can adopt prior art structure, does not describe in detail herein.
Fig. 3 is the multiview drawing of the main apparent direction of jacking system in deployed condition, and Fig. 5 is the multiview drawing of jacking system in the main apparent direction in contraction state.In Fig. 3, the axle center of the second roller 32 on two interior fork branches 52 and the axial connecting line of jointed shaft 35 are that the line in axle center, the axle center of jointed shaft 35 and the axle center of the first roller 31 of the 4th roller 34 on 42, two outer fork branches 51 is 41.The axle center of the first roller 31 is 31a, is 43 by the horizon of axle center 31a, and horizon 43 intersects at a 33a with line 42, the axle center of the 3rd roller 33 is 33b, point 33b position is in the vertical direction higher than a 33a, and in the time that this jacking system rises to extreme higher position, this discrepancy in elevation is that h2(consults Fig. 4).In Fig. 5, lifting crotch is in the time of extreme lower position, outer fork branch 51 shelters from interior fork branch 52, in vertical direction, the first roller 31 of outer fork branch 51 front ends is positioned on the second roller 32 of fork branch 52 front ends, and the 4th roller 34 of outer fork branch 51 rear ends is positioned under fork branch 52 front ends the 3rd roller 33, and the axle center 33b of some 33a and the 3rd roller 33 diff-H is in vertical direction h1, in conjunction with the diff-H h2 of Fig. 3, h2 > h1.
As shown in Figure 6, in figure, F state is the state of jacking system while being positioned at lowest order, E state is the state of jacking system while being positioned at most significant bit, in the present embodiment, while being positioned at F state, the value of h1 is 20mm, while being positioned at E state, the value of h2 is 35mm, and front end second roller 32 of interior fork branch 52 is positioned at same point in the time of low level and a high position.The 3rd roller 33 of interior fork branch 52 rear ends is positioned at 33(F in the time of low level) position, in the time of a high position, be positioned at 33(E) position, the 3rd roller 33, in the time running to a high position from low level, has carried out upwards simultaneously and has moved forward.The first roller 31 of outer fork branch 51 front ends is positioned at 31(F in the time being positioned at low level), when high-order, be raised to 31(E) position, the first roller 31 runs to high-order process from low level, only move up, the 4th roller 34 of outer fork branch 51 rear ends, in the time that jacking system is positioned at low level in 34(F) position, in the time that jacking system is raised to a high position, be positioned at 34(E) position, in the time that lifting crotch runs to a high position from low level, the 4th roller 34 only moves forward.
Fig. 7 is the principle schematic of jacking system of the present invention, as shown in the figure, suppose, on axis 42, roller 33 ' is set, its axle center is the 33a in Fig. 2, that is: roller 33 ' roller 33 ' (F) and first roller 31(F in the time that jacking system is positioned at lowest order) level is contour, roller 33 ' while being positioned at most significant bit (E) also with the first roller 31(E) level is contour.As shown in Figure 2, during in a high position, on platform 2, formed overarm arm B-B ' at lifting fork chord position.Now, roller 33 ' and the first roller 31 levels are contour in theory, but owing to there being the existence of overarm arm B-B ', have goods on rear platform 2 time, the rear end of rear platform 2 will be lower than front end.The present invention is by being arranged to the height higher than the first roller 31 by the height of the 3rd roller 33, and two interior plane of revolution one setpoint distances of pitching branch 52 are arranged to upwards depart from the axle center of the 3rd roller 33, make, in the time that jacking system is positioned at low level, the 3rd roller 33 differs 20mm in vertical direction with roller 33 ', along with the continuous rising of jacking system, the 3rd roller 33 is increasing with roller 33 ' height in the vertical direction, in the time that jacking system is raised to most significant bit, diff-H is 35mm, like this, effectively resist sagging that platform 2 causes at overarm arm B-B ' in the time carrying cargo, make platform 2 still keep the state of a relative level.In the specific implementation, can first, second, third, fourth transverse axis 61,62,63,64 be arranged to its upper roller 31,32,33,34 coaxial, the height of the 3rd transverse axis 63 is arranged to higher than the height of the first transverse axis 61 and is made the axis of the 3rd transverse axis 63 upwards depart from plane of revolution one setpoint distances of two interior fork branches 52, can realize like this, equally object of the present invention.
Attention: the plane of revolution of above-mentioned two interior fork branches 52 refers to: be arranged on the plane that the line of axle center 31a of two second rollers 32 on the second transverse axis 62 and the axial connecting line of two jointed shafts 35 of hinged inner and outer fork branch 51,52 form.
The foregoing is only better possible embodiments of the present invention, not limit the scope of the invention.In other embodiments of the invention, the first, fork branch assembly can comprise three or three above interior fork branches 52, the second fork branch assembly can comprise three or three ends that also can not be set directly at inner and outer fork branch 51,52 with upper outside fork branch 51, first, second, third, fourth rollers by transverse axis.The equivalent structure that all utilizations specification sheets of the present invention and accompanying drawing content have been done changes, and is all included in protection scope of the present invention.
Claims (1)
1. a platform truck jacking system, comprise that a underframe and is arranged on the lifting crotch of the scissors fork structure on this underframe, this lifting crotch is included in the first fork branch assembly and the second fork branch assembly that middle part is separately hinged together, front end of this first fork branch assembly is hinged on the position of forward end of this underframe by roller, rear end be can lifting free end, the rear end of this second fork branch assembly by roller be slidably disposed on this underframe by the slide rail of rear end, front end be can lifting free end, the rear end of this first fork branch assembly can jointly be connected a platform and be driven this lifting platform by roller by the front end of roller and this second fork branch assembly, it is characterized in that: when this lifting crotch is during in complete contraction state, the centre of gration of the rear end roller of this first fork branch assembly will exceed one first height compared with the centre of gration in the vertical direction of the front end roller of the second fork branch assembly, when this lifting crotch is during in complete open configuration, the centre of gration of the rear end roller of this first fork branch assembly will exceed one second height compared with the centre of gration in the vertical direction of the front end roller of the second fork branch assembly, this second be highly greater than this first height, and when this lifting crotch from complete contraction state in complete open configuration change procedure, the height that the centre of gration of the rear end roller of this first fork branch assembly exceeds at vertical direction compared with the centre of gration of the front end roller of the second fork branch assembly is to be greater than this first height and to be less than this second height.
2
.platform truck jacking system as claimed in claim 1, it is characterized in that: this first fork branch assembly comprises fork branch in two and is arranged on the roller at each interior fork branch two ends, this the second fork branch assembly comprises two outer fork branches and is arranged on the roller at each outer fork branch two ends, in these two, fork branch is arranged on the inner side of these two outer fork branches accordingly, and adjacent outer fork branch and interior fork are together with middle part is separately hinged.
3
.platform truck jacking system as claimed in claim 2, it is characterized in that: this first fork branch assembly also comprises the second transverse axis between the front end that is connected to fork branch in these two and the 3rd transverse axis between rear end, the roller at described interior fork branch two ends accordingly, can be rotatably set in the two ends of this second transverse axis and the 3rd transverse axis, the roller that is arranged on described the second transverse axis two ends is defined as to the second roller, the roller that is arranged on the 3rd transverse axis two ends is defined as to the 3rd roller; This second fork branch assembly also comprises the first transverse axis between the front end that is connected to these two outer fork branches and the 4th transverse axis between rear end, the roller at described outer fork branch two ends accordingly, can be rotatably set in the two ends of this first transverse axis and the 4th transverse axis, the roller that is arranged on described the first transverse axis two ends is defined as to the first roller, the roller that is arranged on the 4th transverse axis two ends is defined as to the 4th roller.
4
.platform truck jacking system as claimed in claim 3, is characterized in that: the height of the 3rd roller is higher than the height of the first roller, and plane of revolution one setpoint distance of two interior fork branches is arranged to upwards depart from the axle center of the 3rd roller.
5
.platform truck jacking system as claimed in claim 3, it is characterized in that: described first, second, third, fourth transverse axis all coaxially arranges with its upper roller, the height of described the 3rd transverse axis is higher than the height of described the first transverse axis, and the axis of described the 3rd transverse axis upwards departs from plane of revolution one setpoint distance of two interior fork branches.
6
.platform truck jacking system as claimed in claim 1, is characterized in that: this is first highly for 10-30mm; This second is highly 25-45mm.
7
.platform truck jacking system as claimed in claim 1, is characterized in that: this first is highly 20 millimeters.
8
.platform truck jacking system as claimed in claim 1, is characterized in that: this second is highly 35 millimeters.
9
.a kind of platform truck, comprise a front platform and one with the rear platform of this front platform split setting, it is characterized in that, also comprise that one can drive the platform truck jacking system as described in any one in claim 1-8 of this rear platform lifting.
10
.platform truck as claimed in claim 9, is characterized in that, roller and this rear platform sliding block joint of the rear end of this first fork branch assembly, and roller and this rear platform of the front end of this second fork branch assembly are hinged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010227540.5A CN102328889B (en) | 2010-07-12 | 2010-07-12 | Lifting device of platform truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010227540.5A CN102328889B (en) | 2010-07-12 | 2010-07-12 | Lifting device of platform truck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102328889A CN102328889A (en) | 2012-01-25 |
| CN102328889B true CN102328889B (en) | 2014-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010227540.5A Active CN102328889B (en) | 2010-07-12 | 2010-07-12 | Lifting device of platform truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102328889B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106774448B (en) * | 2016-12-29 | 2019-09-13 | 东莞华贝电子科技有限公司 | A kind of automatic level adjusting device |
| JP7364535B2 (en) * | 2020-06-29 | 2023-10-18 | トヨタ自動車株式会社 | Workpiece conveyance system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2039332U (en) * | 1988-09-21 | 1989-06-14 | 杨祥麟 | Movable lifting platform |
| CN101402440A (en) * | 2008-07-25 | 2009-04-08 | 白天海 | Mobile hoistable platform and labor-saving apparatus |
| JP2009263094A (en) * | 2008-04-25 | 2009-11-12 | Makitekku:Kk | Lifting device |
| CN101665223A (en) * | 2009-09-21 | 2010-03-10 | 王敏奇 | Multi-functional elevator |
| CN201494041U (en) * | 2009-09-25 | 2010-06-02 | 盐城市中液液压件有限公司 | Hydraulic elevator mechanism used for horizontal-type refuse compaction transloading equipment |
-
2010
- 2010-07-12 CN CN201010227540.5A patent/CN102328889B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2039332U (en) * | 1988-09-21 | 1989-06-14 | 杨祥麟 | Movable lifting platform |
| JP2009263094A (en) * | 2008-04-25 | 2009-11-12 | Makitekku:Kk | Lifting device |
| CN101402440A (en) * | 2008-07-25 | 2009-04-08 | 白天海 | Mobile hoistable platform and labor-saving apparatus |
| CN101665223A (en) * | 2009-09-21 | 2010-03-10 | 王敏奇 | Multi-functional elevator |
| CN201494041U (en) * | 2009-09-25 | 2010-06-02 | 盐城市中液液压件有限公司 | Hydraulic elevator mechanism used for horizontal-type refuse compaction transloading equipment |
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| Publication number | Publication date |
|---|---|
| CN102328889A (en) | 2012-01-25 |
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Effective date of registration: 20170904 Address after: No. 97, Changping Road, Shahe Town, Beijing, Changping District, 5 Co-patentee after: LANGFANG CIMC AIRPORT EQUIPMENT CO., LTD. Patentee after: Xinfa Airport Equipment Ltd. Address before: 518000 No. four, four industrial road, Shekou, Guangdong, Shenzhen Co-patentee before: Chinese International Marine Container (Group) Co., Ltd. Patentee before: Shenzhen CIMC-TianDa Airport Support Co.,Ltd. |