CN112174058A - Lifting structure of electric lifting type aerial work platform truck - Google Patents
Lifting structure of electric lifting type aerial work platform truck Download PDFInfo
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- CN112174058A CN112174058A CN202011228422.6A CN202011228422A CN112174058A CN 112174058 A CN112174058 A CN 112174058A CN 202011228422 A CN202011228422 A CN 202011228422A CN 112174058 A CN112174058 A CN 112174058A
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- 230000007246 mechanism Effects 0.000 claims abstract description 68
- 230000001360 synchronised effect Effects 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims description 20
- 230000006698 induction Effects 0.000 claims description 18
- 230000000903 blocking effect Effects 0.000 claims description 15
- 230000005489 elastic deformation Effects 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000001939 inductive effect Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
- B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F13/00—Common constructional features or accessories
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
- B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The utility model provides an electric lift formula aerial working platform truck's elevation structure, includes the frame, still includes electric putter and sleeve mechanism, sleeve mechanism includes inner skleeve, well sleeve, outer sleeve and platform connecting cylinder, the inner skleeve is connected on the frame, electric putter with the inner skleeve is connected, well sleeve cup joints outside the inner skleeve, the outer sleeve cup joints outside the well sleeve, the platform connecting cylinder cup joints outside the outer skleeve, electric putter's top is worn out the inner skleeve and top well telescopic top, well sleeve with between the outer sleeve and the platform connecting cylinder with all be connected with synchronous hoist mechanism between the outer sleeve. The invention adopts a relatively cleaner electric driving source, has small noise, is not easy to pollute the working environment, occupies small space and has low initial height, and the invention still has enough lifting height on the basis, can be used indoors and outdoors and has higher indoor use phase.
Description
Technical Field
The invention relates to the technical field of aerial work platforms, in particular to a lifting mechanism of an electric lifting type aerial work platform car.
Background
The aerial work platform is a movable aerial work product for serving aerial work, equipment installation, maintenance and the like in various industries, and one of core structures of the aerial work platform is a lifting mechanism. The existing lifting mechanism mostly adopts an engine driving mode or a hydraulic driving mode to lift the working platform, wherein a scissor-type lifting structure has a relatively long and wide use condition, and for example, a multifunctional aerial work platform for a lifter disclosed in patent document with the application number of CN201921608842.X comprises: table surface and guardrail, the guardrail is fixed to be set up on table surface, the lift groove has been seted up to table surface upper surface, be provided with the scissors cantilever crane in the lift groove, be provided with the pneumatic cylinder on the scissors cantilever crane, the seat board is installed to scissors cantilever crane upper end, seat board one end is "concave" type and opens the structure, the toolbox has been placed in "concave" type opens the structure, and the power supply of its adoption is hydraulic power just. However, the hydraulic driving mode generally has the problems of large noise, serious tail gas pollution, easy oil leakage, inconvenient maintenance and the like, and the scissor-type lifting structure occupies relatively large space, has relatively high initial height, is heavy as a whole, has higher requirement on the space of a field, and is not very suitable for conventional indoor work.
Disclosure of Invention
The invention aims to provide a lifting mechanism of an electric lifting type aerial work platform car, and solves the problems of overall heaviness, high space requirement, inconvenience in maintenance and easiness in pollution to a working environment of a traditional scissor type lifting structure.
The specific technical scheme of the invention is as follows: a lifting structure of an electric lifting type aerial work platform vehicle comprises a vehicle frame, an electric push rod and a sleeve mechanism, the sleeve mechanism comprises an inner sleeve, a middle sleeve, an outer sleeve and a platform connecting cylinder, the inner sleeve is connected to the frame, the electric push rod is connected with the inner sleeve, the middle sleeve is sleeved outside the inner sleeve, the outer sleeve is sleeved outside the middle sleeve, the platform connecting cylinder is sleeved outside the outer sleeve, the top end of the electric push rod penetrates through the inner sleeve and is propped against the top of the middle sleeve, a synchronous lifting mechanism is connected between the middle sleeve and the outer sleeve and between the platform connecting cylinder and the outer sleeve, the synchronous lifting mechanism is used for synchronously lifting the outer sleeve upwards relative to the middle sleeve and synchronously lifting the platform connecting cylinder upwards relative to the outer sleeve along with the electric push rod.
This technical scheme adopts telescopic lift to replace traditional scissor lift, not only can reduce the space occupation degree of elevation structure by a wide margin, can also reduce elevation structure's initial height, and synchronous hoist mechanism's existence still makes the high upper limit that the outer sleeve can reach exceed electric putter's jacking stroke, and this scheme adopts the electric drive source to replace hydraulic power simultaneously, and the oil leakage problem does not have, and the noise is little, and operational environment is difficult by the pollution, overhauls relatively conveniently.
Preferably, the synchronous lifting mechanism comprises a chain guide wheel and a lifting chain wound around the chain guide wheel; the top of the middle sleeve is connected with the chain guide wheel, a corresponding lifting chain is arranged between the outer sleeve and the middle sleeve, the head end of the lifting chain is connected with the bottom of the outer sleeve, and the tail end of the lifting chain is led out of the sleeve mechanism and is connected with the frame; the top of the outer sleeve is provided with the chain guide wheel, a corresponding lifting chain is arranged between the platform connecting cylinder and the outer sleeve, the head end of the lifting chain is connected with the bottom of the platform connecting cylinder, and the tail end of the lifting chain is led out of the sleeve mechanism and connected with the frame.
When the electric push rod jacks the middle sleeve, the head end of the lifting chain also synchronously lifts the outer sleeve, after the push rod is jacked to the limit, the middle sleeve is at the same height as the electric push rod, and the outer sleeve is not at the same height as the electric push rod and the middle sleeve at the moment, but is lifted by the height of one electric push rod jacking stroke relative to the middle sleeve due to the synchronous lifting of the lifting chain; in the same way, the platform connecting cylinder is synchronously lifted along with the outer sleeve due to the existence of the other corresponding synchronous lifting mechanism, and the platform connecting cylinder is not as high as the outer sleeve, but is lifted by the height of a jacking stroke of the electric push rod relative to the outer sleeve. Therefore, the whole structure of the technical scheme is not as heavy as that of a traditional scissor fork, and the maximum jacking height of the electric push rod is multiplied.
Preferably, a single synchronous lifting mechanism comprises two groups of chain guide wheels and lifting chains which are arranged in parallel at the left and the right.
The lifting capacity that it can provide and the stability of lift process are guaranteed in the setting like this, avoid producing moment, appear the situation such as the drive is not enough, the broken chain.
Preferably, the frame is provided with a loose chain detection mechanism, and the tail end of the lifting chain is connected with the loose chain detection mechanism.
The guide part guides the lifting chain to the chain loosening detection mechanism, and the chain loosening detection mechanism can give a detection signal to warn when the lifting chain is loosened (the lifting chain can normally loosen in long-term use, and the loosening means that the degree of the loosening influences the normal work of the lifting chain) or the lifting chain is broken.
Preferably, the loose chain detection mechanism comprises a fixed seat, a movable rod, an elastic movable component, an inductive switch and an inductive sheet, wherein a hole is formed in the fixed seat, and the movable rod penetrates through the hole; a connector is arranged at the part of the movable rod, which is positioned at the front side of the fixed seat, and the tail end of the lifting chain is connected with the connector; the part of the movable rod, which is positioned at the rear side of the fixed seat, is connected with the induction sheet, and the induction switch is connected to the frame; the elastic trigger moving assembly is linked with the movable rod and tenses the movable rod along with the lifting chain to be in a normal elastic deformation state, and the induction sheet and the induction switch are in a normal non-contact state.
Promote the chain and all be in the state of compacting when work or standby, cooperation elastic trigger makes the response piece that the movable rod made on the movable rod keep pulling away from inductive switch's state, in case the promotion chain appears laxly or splits, then elastic trigger makes the movable rod lose the exogenic action that promotes the chain and make its deformation recover, and its reaction makes its removal in the movable rod, makes the response piece be close to and contacts inductive switch then.
Preferably, the elastic triggering actuator assembly comprises an elastic element and a blocking portion, the blocking portion is connected to the movable rod and located in front of the sensing piece, the elastic element is sleeved on the movable rod, the duct is provided with a front end face, and the elastic element abuts against a position between the front end face of the duct and the blocking portion and is in a compressed state.
When the lifting chain normally works or is in a standby state, the elastic element is in a normally compressed state, once the lifting chain is loosened or broken, the elastic element returns to the original state and reacts on the blocking part, and the blocking part drives the movable rod to move towards the direction of the induction switch relative to the elastic element, so that the induction sheet is close to and contacts the induction switch.
Preferably, a part of the movable rod, which is located at the rear side of the fixed seat, is provided with a threaded section, the induction sheet is sleeved on the threaded section, and the induction sheet is fixed by a fastening nut, two sides of which are screwed on the threaded section.
Preferably, a guide part is arranged on the frame, and the lifting chain winds around the guide part and is connected with the chain loosening detection mechanism.
Preferably, the platform connecting cylinder is connected with a goods shelf at the front side and a standing shelf at the rear side.
Preferably, the electric push rod comprises a driving motor, a lead screw and a push rod part, the lead screw is connected with the driving motor, the lead screw is connected in the inner sleeve, and the push rod part is connected on the lead screw.
The invention has the technical advantages that the lifting structure adopts a relatively cleaner electric driving source, the noise is low, the working environment is not easily polluted, the nesting design of the pushing mechanism and the sleeve mechanism is relatively small in occupied space compared with the traditional scissor-fork type structure, the initial height is low, the lifting height is still enough on the basis, the maximum height of the sleeve mechanism is doubled than the jacking height of the pushing mechanism, the lifting mechanism can be used indoors and outdoors, particularly, the lifting mechanism is high in indoor use compatibility, and the lifting mechanism is worthy of popularization and use in the field.
Drawings
FIG. 1 is a schematic side view of an embodiment of the present invention;
FIG. 2 is a partial schematic structural view of a portion e in FIG. 1;
FIG. 3 is a schematic rear view of the embodiment of the present invention;
the names of the parts corresponding to the numbers in the figure are respectively: a 1-vehicle frame, a 11-guide part, b 1-push rod part, b 2-lead screw, b 3-driving motor, c 1-inner sleeve, c 2-middle sleeve, c 3-outer sleeve, c 4-platform connecting cylinder, c 41-goods shelf, c 42-standing frame, d 1-chain guide wheel, d 2-lifting chain, e 1-fixed seat, e 2-movable rod, e 21-connecting head, e 3-inductive switch, e 4-inductive sheet, e 5-elastic element, e 6-blocking part and e 7-fastening nut.
Detailed Description
The invention will be further illustrated by means of specific embodiments in the following description with reference to the accompanying drawings:
referring to fig. 1, 2 and 3, an embodiment of a lifting structure of an electric lifting type aerial platform truck comprises a truck frame a1, an electric push rod and a sleeve mechanism. The electric push rod comprises a push rod part b1, a lead screw b2 and a driving motor b3, wherein the lead screw b2 is connected with the driving motor b3, and the push rod part b1 is connected with a lead screw b 2. The sleeve mechanism comprises an inner sleeve c1, a middle sleeve c2, an outer sleeve c3 and a platform connecting cylinder c4, the inner sleeve c1 is connected to a vehicle frame a1, a lead screw b2 is connected to the inner sleeve c1, a driving motor b3 can extend into a vehicle frame a1 when the driving motor b is installed, the middle sleeve c2 is sleeved outside the inner sleeve c1, the outer sleeve c3 is sleeved outside the middle sleeve c2, the platform connecting cylinder c4 is sleeved outside the outer sleeve c3, the top end of a push rod part b1 penetrates through the inner sleeve c1 and abuts against the top of the middle sleeve c2, and synchronous lifting mechanisms are connected between the middle sleeve c2 and the outer sleeve c3 and between the platform connecting cylinder c4 and the outer sleeve c3 and are used for synchronously lifting the outer sleeve c3 upwards relative to the middle sleeve c2 and synchronously lifting the platform connecting cylinder c4 upwards relative to the outer sleeve c3 along. Platform connector c4 is used to connect the conventional load structure of high altitude platform such as standing rack c41, shelf c 42. The outer sleeve c3 and the middle sleeve c2, the platform connecting cylinder c4 and the outer sleeve c3 can be selectively and additionally provided with a sliding connection structure so as to enable the two to move smoothly in relative motion, for example, the inner wall of the outer sleeve c3 is provided with a sliding block, and the sliding block is in sliding contact with the outer wall of the inner sleeve c 2.
The synchronous lifting mechanism not only synchronously converts the lifting process of the push rod part b1 into the lifting process of the outer sleeve c3 and the platform connecting cylinder c4, but also transforms and enlarges the lifting height of the push rod part b 1. Specifically, two synchronous lifting mechanisms are provided, and each synchronous lifting mechanism comprises two groups of chain guide wheels d1 arranged in parallel left and right and a lifting chain d2 wound around the chain guide wheel d 1. The first synchronized lifting mechanism is configured to: the chain guide wheel d1 is arranged at the top of the middle sleeve c2, the lifting chain d2 is positioned in the clearance space between the outer sleeve c3 and the middle sleeve c2, the head end of the lifting chain d2 is connected with the bottom of the outer sleeve c3, and the tail end of the lifting chain d2 passes through the sleeve mechanism and is connected with the frame a 1; the second synchronous lifting mechanism is arranged as follows: chain guide d1 is located at the top of outer sleeve c3, and lifting chain d2 is in the clearance space between platform connector cylinder c4 and outer sleeve c3, and lifting chain d2 has its head end connected to the bottom of platform connector cylinder c4 and its tail end going through the sleeve mechanism and connected to frame a 1. Fig. 1 only shows the first synchronous lifting mechanism, and fig. 2 has four sets of chain guide wheels d1 and lifting chains d2, two sets of chain guide wheels d1 and lifting chains d2 at two sides belong to the second synchronous lifting mechanism, and two sets of chain guide wheels d1 and lifting chains d2 at the middle belong to the first synchronous lifting mechanism.
The operation of the synchronous lifting mechanism is briefly described as follows, in the process of jacking the middle sleeve c2 by the push rod part b1, the lifting chain d2 in the first synchronous lifting mechanism also moves along with the middle sleeve c2, the tail end of the lifting chain d2 is relatively fixed, the head end drives the outer sleeve c3 to lift upwards, when the push rod part b1 is driven by the lead screw to rise to the highest position, the middle sleeve c2 and the push rod part b1 are at the same height, and the head end of the lifting chain d2 also goes through a stroke corresponding to the height of the push rod part b1, so that the outer sleeve c3 actually raises the height of the two push rod parts b 1; similarly, during the process of lifting the outer sleeve c3 along with the middle sleeve c2, the lifting chain d2 in the second synchronizing mechanism also moves along, the tail end of the lifting chain d 3 is relatively fixed, the head end of the lifting chain d2 drives the platform connecting cylinder c4 to lift upwards, when the outer sleeve c3 is lifted to the highest, the head end of the lifting chain d2 also goes through a stroke corresponding to the height of the push rod part b1, and then the platform connecting cylinder c4 actually rises to the height of the three push rod parts b 1. Therefore, the lifting structure not only has the advantages of small and exquisite overall structure and low initial height, but also ensures that a large enough lifting stroke can be achieved on the basis.
Furthermore, the vehicle frame a1 is further provided with a guide part a11 and a chain loosening detection mechanism, the lifting chain d2 winds around the guide part a11, and the tail end of the lifting chain d2 is connected with the chain loosening detection mechanism. Since the guide portion a11 serves as a steering guide for the lifting chain d2, since the lifting chain d2 is arranged mainly vertically in the sleeve mechanism, and its tail end is led out from top to bottom into the frame a1 when led out of the sleeve mechanism, if it is directly led vertically to the loose chain detection mechanism, the longitudinal span will be large, so that the loose chain detection mechanism needs to be installed in the frame a1 along with it in the longitudinal direction, for the frame a1 which is already close to the bottom surface, the arrangement of the loose chain detection mechanism will increase the longitudinal span of the frame a1, and from the perspective of reasonable utilization of space, it is a better means to arrange the loose chain detection mechanism transversely, and to redirect the lifting chain d2 from the longitudinal direction to the transverse direction. The guide portion a11 may be in the form of a rod, a plate, or another guide wheel, so long as it can smoothly guide the direction of the lifting chain d 2.
Specifically, the chain loosening detection mechanism comprises a fixed seat e1, a movable rod e2, an elastic movable component, an induction switch e3 and an induction sheet e4, wherein a hole is formed in the fixed seat e1, and the movable rod e2 penetrates through the hole. The part of the movable rod e2, which is positioned at the front side of the fixed seat e1, is provided with a connector e21, and the tail end of the lifting chain d2 is connected with a connector e 21. The part of the movable rod e2, which is located at the rear side of the fixed seat e1, is connected with an induction sheet e4, and the induction switch e3 is connected to the vehicle frame a1, in this embodiment, the induction sheet e4 is sleeved on the movable rod e2, the sleeved rod section is a threaded section, fastening nuts e7 screwed on the threaded section are arranged on two sides of the induction sheet e4, and the induction sheet e4 is fastened by two fastening nuts e 7. The elastic trigger enables the movable component and the movable rod e2 to be linked, and the movable rod e2 is tensioned along with the lifting chain d2 to be in a normally elastic deformation state, and the sensing piece e4 and the sensing switch e3 are in a normally non-contact state. The elastic triggering actuating assembly specifically comprises an elastic element e5 and a blocking part e6, the blocking part e6 is connected to the movable rod e2 and is located in front of the sensing piece e4, the elastic element e5 is sleeved on the movable rod e2, the duct has a front end face, the elastic element e5 abuts between the front end face of the duct and the blocking part e6 and is in a compressed state, the blocking part e6 can be a fixing ring (more specifically, the blocking part e6 is actually the design of the fastening nut e7 located on the front side of the sensing piece e4, and is also feasible), and the elastic element e5 can be a spring-disc type spring. The operation of the chain loosening detection mechanism is briefly described as follows, the lifting chain d2 is tightened in a normal state (working or standby state) enough to pull the movable rod e2 by the tail end thereof so that the blocking part e6 on the rod presses the elastic element e5, and meanwhile, the sensing piece e4 is not contacted with the sensing switch e 3; when the lifting chain d2 has a problem, such as excessive slack or breakage, the tail end of the lifting chain d2 no longer has the ability to pull the movable rod e2, the elastic element e5 pushes the blocking portion e6 backward, that is, the whole movable rod e2 is pushed backward, and the sensing piece e4 touches the sensing switch e3, so as to send a detection signal to remind the operator.
It should be mentioned that the elastic deformation state can be a compression state or a tension state at all times, in this embodiment, the elastic deformation state is a compression state at all times, which is better in stability in long-term use relative to the tension state at all times, and the elastic element e5 is sleeved on the movable rod e2 so that the transverse span thereof is smaller, thereby facilitating assembly in the limited space of the vehicle frame a1 and making full and reasonable use of the space. Regarding the design of the constant stretching state, in brief, it is equivalent to shift the installation position of the elastic element e5, so that the tail end of the elastic element is connected and fixed with the frame a1 and the head end is connected and fixed with the movable rod e2, when the lifting chain d2 normally tensions the movable rod e2, the elastic element e5 is stretched, and the sensing piece e4 on the rod is not contacted with the sensing switch e 3; when the lifting chain d2 goes wrong and loses enough tension on the movable rod e2, the elastic element e5 is restored to pull back the movable rod e2, so that the sensing piece e4 on the rod touches the sensing switch e 3.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments, and any variations or modifications may be made to the embodiments of the present invention without departing from the principles.
Claims (10)
1. The utility model provides a lifting structure of electric lift formula aerial working platform car, includes frame (a 1), its characterized in that: the electric push rod and sleeve mechanism is further included, the sleeve mechanism comprises an inner sleeve (c 1), a middle sleeve (c 2), an outer sleeve (c 3) and a platform connecting cylinder (c 4), the inner sleeve (c 1) is connected to the frame (a 1), the electric push rod is connected with the inner sleeve (c 1), the middle sleeve (c 2) is sleeved outside the inner sleeve (c 1), the outer sleeve (c 3) is sleeved outside the middle sleeve (c 2), the platform connecting cylinder (c 4) is sleeved outside the outer sleeve (c 3), the top end of the electric push rod penetrates out of the inner sleeve (c 1) and abuts against the top of the middle sleeve (c 2), synchronous lifting mechanisms are connected between the middle sleeve (c 2) and the outer sleeve (c 3) and between the platform connecting cylinder (c 4) and the outer sleeve (c 3), and are used for following the electric push rod to lift the outer sleeve (c 3) upwards relative to the middle sleeve (c 2) and lift the synchronous lifting mechanisms upwards The platform connecting cylinder (c 4) is synchronously lifted upwards relative to the outer sleeve (c 3).
2. The lifting structure of the electric lifting type aerial work platform truck as claimed in claim 1, wherein: the synchronous lifting mechanism comprises a chain guide wheel (d 1) and a lifting chain (d 2) wound by the chain guide wheel (d 1);
the top of the middle sleeve (c 2) is connected with the chain guide wheel (d 1), a corresponding lifting chain (d 2) is arranged between the outer sleeve (c 3) and the middle sleeve (c 2), the head end of the lifting chain (d 2) is connected with the bottom of the outer sleeve (c 3), and the tail end of the lifting chain passes through the sleeve mechanism and is connected with the frame (a 1);
the top of the outer sleeve (c 3) is provided with the chain guide wheel (d 1), a corresponding lifting chain (d 2) is arranged between the platform connecting cylinder (c 4) and the outer sleeve (c 3), the head end of the lifting chain (d 2) is connected with the bottom of the platform connecting cylinder (c 4), and the tail end of the lifting chain passes through the sleeve mechanism and is connected with the vehicle frame (a 1).
3. The lifting structure of the electric lifting type aerial work platform truck as claimed in claim 2, wherein: the single synchronous lifting mechanism comprises two groups of chain guide wheels (d 1) and lifting chains (d 2) which are arranged in parallel at the left and the right.
4. The lifting structure of an electric lifting type aerial platform truck as claimed in claim 2 or 3, wherein: the frame (a 1) is provided with a chain loosening detection mechanism, and the tail end of the lifting chain (d 2) is connected with the chain loosening detection mechanism.
5. The lifting structure of the electric lifting type aerial work platform truck as claimed in claim 4, wherein: the chain loosening detection mechanism comprises a fixed seat (e 1), a movable rod (e 2), an elastic movable component, an induction switch (e 3) and an induction sheet (e 4), wherein a hole is formed in the fixed seat (e 1), and the movable rod (e 2) penetrates through the hole; a connector (e 21) is arranged at the part, located on the front side of the fixed seat (e 1), of the movable rod (e 2), and the tail end of the lifting chain (d 2) is connected with the connector (e 21); the part of the movable rod (e 2) positioned at the rear side of the fixed seat (e 1) is connected with the sensing piece (e 4), and the sensing switch (e 3) is connected to the frame (a 1); the elastic trigger movable assembly is linked with the movable rod (e 2) and tensions the movable rod (e 2) along with the lifting chain (d 2) to be in a normal elastic deformation state, and the sensing piece (e 4) and the sensing switch (e 3) are in a normal non-contact state.
6. The lifting structure of the electric lifting type aerial work platform truck as claimed in claim 5, wherein: the elastic triggering movable assembly comprises an elastic element (e 5) and a blocking part (e 6), wherein the blocking part (e 6) is connected to the movable rod (e 2) and located in front of the sensing piece (e 4), the elastic element (e 5) is sleeved on the movable rod (e 2), the hole is provided with a front end face, and the elastic element (e 5) abuts between the front end face of the hole and the blocking part (e 6) and is in a compression state.
7. The lifting structure of the electric lifting type aerial work platform truck as claimed in claim 5, wherein: the part of the movable rod (e 2) located on the rear side of the fixed seat (e 1) is provided with a threaded section, the sensing piece (e 4) is sleeved on the threaded section, and the sensing piece (e 4) is fixed by a fastening nut (e 7) with two sides screwed on the threaded section.
8. The lifting structure of the electric lifting type aerial work platform truck as claimed in claim 4, wherein: the vehicle frame (a 1) is provided with a guide part (a 11), and the lifting chain (d 2) winds through the guide part (a 11) and is connected with the chain loosening detection mechanism.
9. The lifting structure of the electric lifting type aerial work platform truck as claimed in claim 1, wherein: the front side of the platform connecting cylinder (c 4) is connected with a goods shelf (c 41) and the rear side is connected with a standing shelf (c 42).
10. The lifting structure of the electric lifting type aerial work platform truck as claimed in claim 1, wherein: the electric push rod comprises a push rod part (b 1), a lead screw (b 2) and a driving motor (b 3), the lead screw (b 2) is connected with the driving motor (b 3), the lead screw (b 2) is connected in the inner sleeve (c 1), and the push rod part (b 1) is connected on the lead screw (b 2).
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| CN202011228422.6A CN112174058A (en) | 2020-11-06 | 2020-11-06 | Lifting structure of electric lifting type aerial work platform truck |
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| CN202011228422.6A CN112174058A (en) | 2020-11-06 | 2020-11-06 | Lifting structure of electric lifting type aerial work platform truck |
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| CN214327050U (en) * | 2020-11-06 | 2021-10-01 | 浙江鼎力机械股份有限公司 | Lifting structure of electric lifting type aerial work platform truck |
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