CN102774786B - Electric lifting table with screw rod torsion-resistant protection design - Google Patents

Electric lifting table with screw rod torsion-resistant protection design Download PDF

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Publication number
CN102774786B
CN102774786B CN201210222627.2A CN201210222627A CN102774786B CN 102774786 B CN102774786 B CN 102774786B CN 201210222627 A CN201210222627 A CN 201210222627A CN 102774786 B CN102774786 B CN 102774786B
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China
Prior art keywords
yoke
case
flask
raising
screw mandrel
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CN201210222627.2A
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CN102774786A (en
Inventor
吴雯龙
郭大宏
黄建峡
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Miracle Automation Engineering Co Ltd
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Miracle Automation Engineering Co Ltd
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Abstract

The invention relates to an electric lifting table with a screw rod torsion-resistant protection design. The electric lifting table comprises a base, an upper table surface, scissor fork mechanisms, a screw rod transmission mechanism and a matched electronic control system, wherein the screw rod transmission mechanism is arranged between two groups of scissor fork mechanisms and comprises a motor, a gearbox, a middle box, a pull box, a screw rod, a stroke guide rod and a braking hydraulic cylinder. The electric lifting table is characterized in that the middle box is provided with a rotatable back rotary seat, the motor and the gearbox are connected and installed on the back rotary seat, a rotatable front rotary seat is installed in the middle of the pull box, and a nut seat is installed on the front rotary seat. According to the electric lifting table, the back rotary seat is installed on the middle box of the screw rod transmission mechanism, the front rotary seat is installed in the middle of the pull box, so that non-axial force on the screw rod can be eliminated, torsion-resistant protection for the screw rod transmission mechanism can be achieved, and the screw rod transmission mechanism can be effectively protected when abnormal conditions happen to devices during manufacturing and using processes.

Description

The electric lifting platform with the antitorque protection design of screw mandrel
Technical field
The present invention relates to a kind of improvement of electric lifting platform, specifically a kind of electric lifting platform with the antitorque protection design of screw mandrel.
Background technology
In car assembling travel line, often need to use jacking equipment, be used for lifting car body or slide plate carrier, realize workpiece in the switching of differing heights.Electric lifting platform (also have and be called electric scissor bay-lift, Cam-type electric bay-lift) is a kind of conventional jacking equipment.But because electric lifting platform inevitably exists assembly error and manufacturing errors in Practical manufacturing, these errors can cause screw mandrel to be in existing the operating mode of non-axial force (power that departs from screw mandrel central axial direction).In addition, because the lifting of bay-lift need to coordinate electric-control system, when debugging mode or employee's maloperation, also may there is bay-lift fallen accident, so also can make screw mandrel be subject to non-axial force.Once the system that detects is locked braking liquid cylinder pressure in time in falling state, because braking liquid cylinder pressure is in screw mandrel one side, once braking liquid cylinder pressure is locked, raising middle flask and draw the case can be in non-parallel state, screw mandrel is subject to non-axial applied force.In lead screw transmission mechanism in the past, because screw mandrel is completely fixed with respect to raising middle flask, once it, be subject to non-axial force, screw mandrel will produce slight bending shape, the damage that can greatly accelerate screw mandrel under this operating mode is even ruptured, thereby has influence on the service life of whole electric lifting platform.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art; the lead screw transmission mechanism of existing electric lifting platform is carried out to rational modification; thereby provide a kind of electric lifting platform with the antitorque protection design of screw mandrel; it can eliminate the suffered non-axial force of screw mandrel; for lead screw transmission mechanism, carry out antitorque protection; make equipment when abnormal condition appear in manufacture, use procedure, lead screw transmission mechanism can be effectively protected, and greatly reduces the maintenance cost of electric lifting platform.
According to technical scheme provided by the invention: there is the electric lifting platform of the antitorque protection design of screw mandrel, comprise base, upper table surface, scissors mechanism, lead screw transmission mechanism and supporting electric-control system; Scissors mechanism has two groups, and two groups of scissors mechanisms are symmetricly set on electric lifting platform both sides; Every group of scissors mechanism all cut yoke outward and formed by cutting yoke and one in one, inside cuts yoke and cuts yoke outward and utilize bearing pin to be hinged at middle part; Inside cut yoke lower end and base hinged, inside cut yoke upper end and be supported on upper table surface by support wheel, the hinged place of inside cutting yoke is installed with epirelief wheel plate with upper part; Cut yoke upper end and upper table surface outward hinged, cut yoke lower end outward and be supported on base by support wheel, the following position, hinged place of cutting yoke is outward installed with lower lobe plate; Described lead screw transmission mechanism is arranged between two groups of scissors mechanisms, lead screw transmission mechanism comprises motor, change speed gear box, raising middle flask, draws case, screw mandrel, stroke guide rod and braking liquid cylinder pressure, raising middle flask two ends are connected with the bearing pin in two groups of scissors mechanisms, motor is connected with change speed gear box and is arranged on raising middle flask, is coaxially connected with screw mandrel on the output shaft of change speed gear box; The described case that draws is arranged on raising middle flask the place ahead, draws case to parallel with raising middle flask, and described screw mandrel is forward through drawing case, the nut seat that forms screw thread transmission is installed drawing with screw mandrel on case; The described case two ends of drawing are provided with roller, and this roller is cut the epirelief wheel plate of yoke and cuts outward between the lower lobe plate of yoke interior; The both sides of described screw mandrel are provided with two stroke guide rods, and stroke guide rod one end is fixed on raising middle flask, and stroke guide rod is through drawing case and forming bearing fit with drawing case; Described braking liquid cylinder pressure is arranged on raising middle flask, and the piston rod of braking liquid cylinder pressure is connected to forward and draws on case; It is characterized in that: a rotating rear rotation seat is installed on described raising middle flask, and described motor is connected with change speed gear box and is arranged on rear rotation seat; The described middle part of case of drawing is provided with a rotating front rotation seat, and described nut seat is arranged on front rotation seat.
As a further improvement on the present invention, on described stroke guide rod, the balance spring that is compressive state is housed.
The present invention compared with prior art; advantage is: the present invention carries out rational modification to the lead screw transmission mechanism of existing electric lifting platform; by rotation seat after installing on the raising middle flask of lead screw transmission mechanism; rotation seat before install at the middle part of drawing case; thereby can eliminate the suffered non-axial force of screw mandrel; for lead screw transmission mechanism, carry out antitorque protection; make equipment when abnormal condition appear in manufacture, use procedure; lead screw transmission mechanism can be effectively protected, and greatly reduces the maintenance cost of electric lifting platform.
Accompanying drawing explanation
Fig. 1 is the structural front view of electric lifting platform of the present invention.
Fig. 2 is that A-A in Fig. 1 is to cutaway view.
Fig. 3 is the left view of Fig. 1.
Fig. 4 is the lead screw transmission mechanism normal working schematic diagram in electric lifting platform.
Fig. 5 is the view while bearing non-axial force of the lead screw transmission mechanism in electric lifting platform.
Description of reference numerals: 1-base, 2-inside cut yoke, 3-motor, 4-change speed gear box, 5-cut outward yoke, 6-upper table surface, 7-bearing pin, 8-epirelief wheel plate, 9-lower lobe plate, 10-braking liquid cylinder pressure, 11-raising middle flask, 12-stroke guide rod, 13-draw case, 14-balance spring, 15-screw mandrel, 16-nut seat, 17-front rotation seat, 18-roller, 19-rear rotation seat.
The specific embodiment
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As shown in Fig. 1 ~ Fig. 3, electric lifting platform of the present invention is mainly comprised of base 1, upper table surface 6, scissors mechanism, lead screw transmission mechanism and supporting electric-control system; Described scissors mechanism has two groups, and two groups of scissors mechanisms are symmetricly set on electric lifting platform both sides; Every group of scissors mechanism all cut yoke 5 outward and formed by cutting yoke 2 and one in one, inside cuts yoke 2 and cuts yoke 5 outward and at middle part, utilize bearing pin 7 to be hinged; Inside cut yoke 2 lower ends and base 1 hinged, inside cut yoke 2 upper ends and be supported on upper table surface 6 by support wheel, the hinged place of inside cutting yoke 2 is installed with epirelief wheel plate 8 with upper part; Cut yoke 5 upper ends and upper table surface 6 outward hinged, cut yoke 5 lower ends outward and be supported on base 1 by support wheel, the following position, hinged place of cutting yoke 5 is outward installed with lower lobe plate 9; Described lead screw transmission mechanism is arranged between two groups of scissors mechanisms, lead screw transmission mechanism mainly by motor 3, change speed gear box 4, raising middle flask 11, draw case 13, screw mandrel 15, stroke guide rod 12 and braking liquid cylinder pressure 10 to form, raising middle flask 11 two ends are connected with the bearing pin 7 in two groups of scissors mechanisms, a rotating rear rotation seat 19 is installed on described raising middle flask 11, described motor 3 is connected with change speed gear box 4 and is arranged on rear rotation seat 19, is coaxially connected with screw mandrel 15 on the output shaft of change speed gear box 4; The described case 13 that draws is arranged on raising middle flask 11 the place aheads, draw case 13 to parallel with raising middle flask 11, the described middle part of case 13 of drawing is provided with a rotating front rotation seat 17, and the nut seat 16 that forms screw thread transmission with screw mandrel 15 is installed on front rotation seat 17, and described screw mandrel 15 is forward through nut seat 16.Described case 13 two ends of drawing are provided with roller 18, and this roller 18 is cut the epirelief wheel plate 8 of yoke 2 and cuts outward between the lower lobe plate 9 of yoke 5 interior; The both sides of described screw mandrel 15 are provided with two stroke guide rods 12, and stroke guide rod 12 one end are fixed on raising middle flask 11, and stroke guide rod 12 is through drawing case 13 and forming bearing fit with drawing case 13; Described braking liquid cylinder pressure 10 is arranged on raising middle flask 11, and the piston rod of braking liquid cylinder pressure 10 is connected to forward and draws on case 13; Described braking liquid cylinder pressure 10 is arranged on raising middle flask 11, and the piston rod of braking liquid cylinder pressure 10 is connected to forward and draws on case 13.
During specific works, motor 3 in lead screw transmission mechanism drives screw mandrel 15 to rotate by change speed gear box 4, screw mandrel 15 rotates the nut seat 16 that orders about on it along screw mandrel 15 axial motions, nut seat 16 drives and draws case 13 to be synchronized with the movement, draw epirelief wheel plate 8 and lower lobe plate 9 in the roller 18 compressing scissors mechanisms at case 13 two ends, the opening angle of scissors mechanism is changed; Draw case 13 under screw mandrel 15 effect during near raising middle flask 11, bay-lift rises, and draws case 13 under the effect of screw mandrel 15 during away from raising middle flask 11, and bay-lift declines.
In above-mentioned working process, under normal condition, raising middle flask in lead screw transmission mechanism 11 and draw case 13 to parallel, screw mandrel 15 is only subject to axial force (as shown in Figure 4).
But when there is error in manufacture assembling, screw mandrel 15 can be subject to non-axial force when operation, in system in the past, screw mandrel 15 is completely fixed with respect to raising middle flask 11, once it, be subject to non-axial force, screw mandrel 15 will produce slight bending shape, and the damage that can greatly accelerate screw mandrel 15 under this operating mode is even ruptured.In addition, bay-lift is generally furnished with dropproof checking system, when there is bay-lift fallen accident, braking liquid cylinder pressure 10 can be locked, because braking liquid cylinder pressure 10 is in screw mandrel 15 1 sides, once braking liquid cylinder pressure 10 is locked, raising middle flask 11 and draw the case 13 will be in non-parallel state (as shown in Figure 5), now screw mandrel 15 is subject to non-axial applied force.
Because the screw mandrel 15 in the present invention is mounted on front rotation seat 17 and rear rotation seat 19; under non-axial applied force; screw mandrel 15 can be followed front rotation seat 17 and 19 rotations of rear rotation seat; reach self adaptation; now non-axial force is born by two stroke guide rods 12 completely, and screw mandrel 15 is only subject to a pair of balancing force effect at front rotation seat 17 and rear rotation seat 19 places, is subject to axial pulling force merely; there will not be phenomenon of rupture, the antitorque protection design of Here it is screw mandrel 15.
In addition, the balance spring 14 that is compressive state is also housed on described stroke guide rod 12, balance spring 14 keeps (as shown in Fig. 1,3,4) by nut.The effect of balance spring 14 is: the one, and in bay-lift uphill process, balance spring 14 helper motor 3 lifting weights; The 2nd, in bay-lift decline process, balance spring 14 saves as elastic potential energy gravitional force, realizes and reduces motor 3 power, improves the object of whole efficiency.Concrete course of action is as follows:
When bay-lift is during in low level, draw case 13 in the position away from raising middle flask 11, balance spring 14 is in compressive state.When bay-lift rises, draw case 13 to move toward raising middle flask 11 under lead screw transmission mechanism effect, drive bay-lift to rise, now balance spring 14 provides thrust for bay-lift.
When bay-lift is during in a high position, draw case 13 in the position near raising middle flask 11, balance spring 14 is in relaxation state.When bay-lift declines, draw case 13 to move away from raising middle flask 11 at bay-lift Action of Gravity Field, now braking force is provided jointly by motor 3 and balance spring 14.

Claims (1)

1. the electric lifting platform with the antitorque protection design of screw mandrel, comprises base (1), upper table surface (6), scissors mechanism, lead screw transmission mechanism and supporting electric-control system; Scissors mechanism has two groups, and two groups of scissors mechanisms are symmetricly set on electric lifting platform both sides; Every group of scissors mechanism all cut yoke (5) outward and formed by cutting yoke (2) and one in one, inside cuts yoke (2) and cuts yoke (5) outward and at middle part, utilize bearing pin (7) to be hinged; Inside cut yoke (2) lower end and base (1) is hinged, inside cutting yoke (2) upper end, by support wheel, to be supported on upper table surface (6) upper, and the hinged place of inside cutting yoke (2) is installed with epirelief wheel plate (8) with upper part; Cut yoke (5) upper end outward and upper table surface (6) is hinged, cutting yoke (5) lower end outward, by support wheel, to be supported on base (1) upper, and the following position, hinged place of cutting yoke (5) is outward installed with lower lobe plate (9); Described lead screw transmission mechanism is arranged between two groups of scissors mechanisms, lead screw transmission mechanism comprises motor (3), change speed gear box (4), raising middle flask (11), draws case (13), screw mandrel (15), stroke guide rod (12) and braking liquid cylinder pressure (10), raising middle flask (11) two ends are connected with the bearing pin (7) in two groups of scissors mechanisms, motor (3) is connected with change speed gear box (4) and is arranged on raising middle flask (11) above, is coaxially connected with screw mandrel (15) on the output shaft of change speed gear box (4); The described case (13) that draws is arranged on raising middle flask (11) the place ahead, draws case (13) to parallel with raising middle flask (11), and described screw mandrel (15) is forward through drawing case (13), the nut seat (16) that forms screw thread transmission is installed drawing with screw mandrel (15) on case (13); Described case (13) two ends of drawing are provided with roller (18), and this roller (18) is positioned to be cut the epirelief wheel plate (8) of yoke (2) and cuts outward between the lower lobe plate (9) of yoke (5); The both sides of described screw mandrel (15) are provided with two stroke guide rods (12), and it is upper that stroke guide rod (12) one end is fixed on raising middle flask (11), and stroke guide rod (12) is through drawing case (13) and forming bearing fit with drawing case (13); It is upper that described braking liquid cylinder pressure (10) is arranged on raising middle flask (11), and the piston rod of braking liquid cylinder pressure (10) is connected to forward and draws on case (13); It is characterized in that: a rotating rear rotation seat (19) is installed on described raising middle flask (11), and described motor (3) is connected with change speed gear box (4) and is arranged on rear rotation seat (19); The described middle part of case (13) of drawing is provided with a rotating front rotation seat (17), and described nut seat (16) is arranged on front rotation seat (17).
CN201210222627.2A 2012-06-29 2012-06-29 Electric lifting table with screw rod torsion-resistant protection design Active CN102774786B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210222627.2A CN102774786B (en) 2012-06-29 2012-06-29 Electric lifting table with screw rod torsion-resistant protection design

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Application Number Priority Date Filing Date Title
CN201210222627.2A CN102774786B (en) 2012-06-29 2012-06-29 Electric lifting table with screw rod torsion-resistant protection design

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CN102774786B true CN102774786B (en) 2014-11-26

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102765677B (en) * 2012-06-29 2014-11-26 天奇自动化工程股份有限公司 Electric lifting table with spring balanced design

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2542817A1 (en) * 2005-12-27 2007-06-27 Hanlon Engineering, Inc. Screw scissor lift
CN201002951Y (en) * 2006-11-16 2008-01-09 机械工业第四设计研究院 Electric shear-fork type uniform speed lifting platform
JP4984229B2 (en) * 2007-01-30 2012-07-25 株式会社ダイフク Carriage transfer device
CN201553584U (en) * 2009-10-14 2010-08-18 江苏天奇物流系统工程股份有限公司 Screw rod lifting platform by electric driving
CN201647922U (en) * 2010-03-30 2010-11-24 国营红林机械厂 Miniature lifting platform
CN202729700U (en) * 2012-06-29 2013-02-13 江苏天奇物流系统工程股份有限公司 Power-driven lifting platform with lead screw torsion resistance protection function

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Address after: 214187 Jiangsu Province, Wuxi city Huishan District Luoshe town Lotus Luo Road No. 288

Applicant after: Miracle Automation Engineering Co., Ltd.

Address before: 214171, No. 288, Luo Lotus Road, Luo Zhen Town, Huishan District, Jiangsu, Wuxi

Applicant before: Tianqi Material Flow System Engineering Co., Ltd., Jiangsu

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Free format text: CORRECT: APPLICANT; FROM: TIANQI MATERIAL FLOW SYSTEM ENGINEERING CO. LTD., JIANGSU TO: MIRACLE AUTOMATION ENGINEERING CO., LTD.

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