CN108975240B - Movable lifting stair platform - Google Patents
Movable lifting stair platform Download PDFInfo
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- CN108975240B CN108975240B CN201811059332.1A CN201811059332A CN108975240B CN 108975240 B CN108975240 B CN 108975240B CN 201811059332 A CN201811059332 A CN 201811059332A CN 108975240 B CN108975240 B CN 108975240B
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- 230000007246 mechanism Effects 0.000 claims description 42
- 230000001360 synchronised effect Effects 0.000 claims description 9
- 230000003028 elevating effect Effects 0.000 claims description 2
- 230000007423 decrease Effects 0.000 abstract description 4
- 230000001174 ascending effect Effects 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 4
- 230000009194 climbing Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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
- B66F11/042—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 actuated by lazy-tongs mechanisms or articulated levers
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- Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- Mechanical Engineering (AREA)
- Ladders (AREA)
- Handcart (AREA)
Abstract
The invention relates to a movable lifting stair platform. The movable lifting stair platform comprises a base, a caster assembly, a platform body, a lifting device and a stair tread assembly. The stair step assembly comprises multiple steps of stair steps which are sequentially arranged from top to bottom, the highest first step stair step platform is replaced, and the lowest first step stair step is fixed with the bottom plate; each step of stair steps comprises a stair tread plate, a guardrail handrail tube and a sleeve; the lower end of the guardrail handrail pipe of the upper stair step is sleeved in the sleeve of the lower stair step. The base and the platform are connected through the lifting device; meanwhile, the stair tread assembly is arranged and is used as a continuous channel for walking up and down. Not only the platform can be lifted, but also the stair steps increase or decrease the steps along with the lifting of the platform, and the guardrail also increases and decreases the height along with the lifting of the platform. The gradient and the height of the stair step at any height are kept unchanged, and the stair step assembly can be unfolded or folded along with the stair step assembly. Simple structure, free lifting and convenient use.
Description
Technical Field
The invention relates to a lifting platform, in particular to a movable lifting stair platform.
Background
The movable stair platform is quite widely applied, is used for manufacturing, assembling, repairing and maintaining, cleaning and maintaining, temporary construction and other operations in industrial factory buildings, public places, families and other scenes, and is an indispensable common ascending appliance. At present, the mobile platform is of a welding structure and is highly fixed. In practical use, the height required to be operated or the height required to pass through the climbing are different, and a plurality of fixed stair platforms with different heights are required to be prepared in the same working area for selection and use in order to meet the use conditions of different heights. In special cases, if the height of the landing is limited by the height of the channel, the width of the channel can meet the requirement that the landing passes laterally, and the landing needs to be manually laid down and then lifted to a position with height obstacle; the short stair platform without the limit of the height can pass through but can not meet the requirement of the height in use, and only the heightening device is additionally arranged on the platform. Not only is labor-consuming, but also does not meet the safety operation requirements. The use height requirement is low and the limitation of the channel height is high. Particularly, the mobile device is difficult to move under the condition of bad pavement, is inconvenient to store, occupies space and is unfavorable for field management.
At present, the lifting platform replacing the traditional welding stair platform mostly moves by power, and the platform is lifted and stretched by electric or hydraulic pressure. The mobile platform solves the problem of different requirements of using heights, and one mobile platform can replace a plurality of mobile platforms with different heights. However, such a mobile lifting platform has limitations:
(1) Because the movable platform has no stair steps, a continuous channel which can smoothly ascend and descend between the ground and the platform cannot be formed, and the stair platform which can freely ascend and descend at a satisfactory operation height cannot be formed. In the continuous operation process of the main and auxiliary multi-person cooperation required for completing the maintenance task, a convenient channel for auxiliary work ascending cannot be formed. When the ground material, tools or others are needed to be used again to complete the task on the platform, the platform can only be lowered and raised again. Is inconvenient to operate, frequently rises and falls, and has low working efficiency.
(2) As the lifting platform is mostly moved by power, the lifting platform belongs to the category of motor vehicles. The lifting mechanism adopts a mechanical transmission or hydraulic system, and needs to master a certain operation skill or specially train to support the evidence for on duty. The special property is strong, the work scheduling is not suitable, and the labor cost is high. The equipment has high price, large size, poor trafficability, high use and maintenance cost and is difficult for common enterprises to bear.
The prior movable fixed-height stair platform uses four common casters, generally two directional wheels and two steering wheels or four steering wheels. One of the casters is provided with a brake, four-point four-time operation is required to brake all the brakes on all the casters in order to ensure the braking of the mobile stair platform, and four-point four-time operation is required to cancel the braking. When the platform, side or sides are close to a wall or to equipment and to obstacles, the braking operation is inconvenient. The braking is only travel braking, and controls the movement in the front-rear direction. The steering fails to brake, and the platform can shake around the circumference of four casters, so that the stability is poor.
Disclosure of Invention
In order to solve the above problems, the present invention provides a mobile lift landing that can be stepped up and down to and from each other by stepping on a foot, and forms a continuous passage between the ground and a landing that meets the operational height requirements or a landing height that meets the climbing passing. Not only the platform can be lifted, but also the stair tread increases or decreases the number of steps along with the lifting of the platform. The area of the landing lifting platform is reduced, the landing area is reduced, and the landing area is increased. In order to ensure the stability of the landing, the higher the landing is, the smaller the area is, and the operators are reduced. The lower the platform, the larger the area, and the more operators can increase. The height of the guard rail is increased and decreased synchronously. The gradient of the platform on any height stairs is kept unchanged, the height of each step between steps is unchanged, and the height of each step is raised to the highest and lowered to the lowest overall dimension. The four casters can adopt a multi-gear central control mode to brake the running and steering in different places. The braking is convenient, and the platform height selection range is wide. The stair platforms are lifted and changed to different heights, so that the alternative stair platforms with different height specifications do not need to be placed on site, and one stair platform is provided with a plurality of stair platforms. Free lifting, convenient placement, wide application range and easy field management. Low cost and low investment.
The technical scheme adopted by the invention is as follows: the utility model provides a remove lift stair platform, includes the base, sets up the truckle subassembly in the base bottom, sets up the elevating gear who goes up and down in the platform body and the drive platform body of base top, its characterized in that: the stair step assembly comprises multiple steps of stair steps which are sequentially arranged from top to bottom, the highest first step of stair is replaced by a platform, and the lowest first step of stair step is fixedly connected with the base. Each step of stair step comprises a stair tread plate and guardrail handrail pipes which are connected with the P-shaped structures on two sides of the stair tread plate. The P-shaped bottom is connected with a tread plate, the vertical part on the left side of the P-shaped bottom is a sliding tube and an armrest, and the vertical part on the right side of the P-shaped bottom is an outer sleeve; the sliding sleeve in the vertical part on the left side of the P-shaped pipe of the stair step of the upper step is inserted into the outer sleeve in the vertical part on the right side of the P-shaped pipe of the lower step.
Preferably, an intermediate connecting block is arranged between the sliding pipe in the left vertical part and the outer sleeve in the right vertical part of the P-shaped structure on the same side of the stair tread, and a notch meeting the lifting stroke of the stair tread is formed in the outer sleeve in the right vertical part. The middle connecting block is provided with a bolt, a swing arm and a gear, one end of the swing arm is connected with the gear through the bolt, the other end of the swing arm is connected with one end of the bolt, the other end of the bolt is matched with a bolt hole on a guardrail handrail tube, the gear stretches into the sleeve, and a rack matched with the gear is arranged in the guardrail handrail tube of the previous step of stair step; when driven by the driving device, the sliding tube and the outer sleeve of the two-stage adjacent stair stepping guardrail handrail move relatively. The rack of the stair step of the previous stage drives the gear of the next stage to rotate, drives the swing arm to rotate, and further drives the bolt to move along the guide hole on the middle connecting block, and the bolt is inserted into or retracted from the bolt hole.
Preferably, the lifting device comprises a scissors supporting frame mechanism and a driving mechanism, wherein the scissors supporting frame mechanism and the driving mechanism are symmetrically arranged on two sides of the base and used for driving the scissors supporting frame mechanism to move, the upper end of the scissors supporting frame mechanism is connected with the platform body, the lower end of the scissors supporting frame mechanism is connected with the base, one end of the driving mechanism is arranged on the base, and the other end of the driving mechanism is connected with the scissors supporting frame mechanism through an intermediate rotating shaft.
Further, the scissors support mechanism comprises at least one set of scissors rest, each set of scissors rest comprises a first scissors plate, a second scissors plate, a third scissors plate and a fourth scissors plate, or more scissors plates. The middle part of the first scissor plate is hinged with the middle part of the second scissor plate, the lower end of the first scissor plate is hinged on the base, and the lower end of the second scissor plate is arranged in a chute at one side of the base through a roller; the upper end of the first shear plate is hinged with the lower end of the fourth shear plate, and the upper end of the second shear plate is hinged with the lower end of the third shear plate; the middle part of third scissors board and the middle part of fourth scissors board are articulated together, the upper end of third scissors board passes through the gyro wheel setting in the spout of platform body one side, the upper end of fourth scissors board articulates on the platform body.
Further, the two sides of the scissors supporting frame mechanisms are connected together through two synchronous anti-shake rods, the upper end of the first scissors plate and the lower end of the fourth scissors plate are hinged to one synchronous anti-shake rod, and the upper end of the second scissors plate and the lower end of the third scissors plate are hinged to the other synchronous anti-shake rod.
Furthermore, the lifting driving mechanism adopts manual, mechanical, electric, hydraulic, pneumatic and other modes.
Preferably, the caster assembly comprises four center control wheels disposed on four casters at the bottom of the base. The central control wheel has the functions of advancing, steering and braking and is connected with a pedal or a hand pull rod through a hexagonal shaft. The base includes at least one brake control point.
The beneficial effects obtained by the invention are as follows: the base and the platform body are connected through the lifting device, the stair step assembly is arranged, the stair step assembly can be stepped to and fro, and a continuous channel is formed between the ground and the platform meeting the operation height requirement or the platform height passing through the climbing. Not only the platform can be lifted, but also the stair tread increases or decreases the number of steps along with the lifting of the platform. The height of the guard rail is increased and decreased synchronously. The gradient of the stair steps at any height is kept unchanged, the height of each step between the steps is unchanged, and the stair steps are raised to the highest and lowered to the lowest, so that the overall dimension is unchanged. The four casters can adopt a multi-gear central control mode to brake the running and steering in different places. The braking is convenient, and the platform height selection range is wide. The stair step platforms are lifted and lowered to change different heights, so that the alternative of the stair step platforms with different height specifications does not need to be placed on site, and one stair step platform is provided with a plurality of stair steps. Free lifting, convenient placement, wide application range and easy field management. Simple structure and convenient use. Low cost and low investment.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an isometric view of FIG. 1;
FIG. 3 is a view of the platform body as it is lowered to the bottom-most end;
FIG. 4 is a schematic view of a connection structure of two adjacent stair steps;
FIG. 5 is a schematic view of a scissor jack mechanism;
fig. 6 is a schematic structural view of the caster assembly.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
As shown in fig. 1-3, the movable lifting stair platform of the invention comprises a base 1, a caster assembly 4, a platform body 2, a lifting device 3 and a stair tread assembly 5, wherein the platform body 2 is arranged above the base 1 and is connected through the lifting device 3, the lifting device 3 drives the platform body 2 to ascend or descend, the caster assembly 4 is arranged at the bottom of the base 1, and the movement of the whole movable lifting stair platform is facilitated. The stair step assembly 5 is arranged at the side of the lifting device 3, and the lifting device 3 drives the platform body 2 to lift and simultaneously drives the stair step assembly 5 to be unfolded or folded.
In this embodiment, the stair step assembly 5 includes multiple steps of stair steps sequentially arranged from top to bottom, the highest first step of stair is replaced by the platform body 2, and the lowest first step of stair steps is connected with the base 1. Each step of stair step comprises a stair tread plate 51, a guardrail handrail pipe 52 (the guardrail handrail pipe 52 is of a P-shaped structure in the embodiment) and a sleeve pipe 53, the P-shaped guardrail handrail pipe 52 and the sleeve pipe 53 are symmetrically arranged on two sides of the stair tread plate 51, and the lower end of the P-shaped guardrail handrail pipe 52 of the previous step of stair step on the same side of the stair tread plate 51 is sleeved in the sleeve pipe 53 of the next step of stair step.
Referring to fig. 4, a middle connecting block 54 is arranged between a sliding pipe in a vertical part on the left side and a sleeve 53 in a vertical part on the right side of a P-shaped structure on the same side of the stair tread plate 51, a notch meeting the lifting stroke of the stair tread is formed in the sleeve 53, a bolt 55, a swing arm 57 and a gear 58 are arranged on the middle connecting block 54, one end of the swing arm 57 is connected with the gear 58 through a hinge shaft, the other end of the swing arm 57 is connected with one end of the bolt 55, the other end of the bolt 55 is matched with a bolt hole in the guardrail handrail pipe 52, and the gear 58 extends into the sleeve 53; a rack 56 matched with a gear 58 is arranged in the guardrail handrail tube 52 of the previous step of stair steps. When driven by the driving device, the sliding tube and the outer sleeve of the two-stage adjacent stair stepping guardrail handrail move relatively. The rack 56 of the stair step of the previous step drives the gear 58 of the next step to rotate, the gear 58 drives the swing arm 57 to rotate, and further drives the bolt 55 to move along the guide hole on the middle connecting block 54, and the bolt 55 is inserted into or retracted into the bolt hole. When the stair railing is installed, the handrail pipe 52 of the higher-order stair steps passes through the sleeves 53 of the lower-order stair steps, the stair steps sequentially pass through one row, and the railing of the platform body 2 passes through the sleeves 53 of the highest-order stair steps.
The lifting device 3 comprises a scissor supporting frame mechanism 31 and a driving mechanism 32, wherein the scissor supporting frame mechanism 31 and the driving mechanism 32 are symmetrically arranged on two sides of the base 1, the driving mechanism 32 is driven in a hydraulic cylinder or cylinder mode, the driving mechanism is driven in a hydraulic mode in the embodiment, and when the lifting device is used, a manual pedal mode (the lifting driving mechanism can also adopt modes such as manual mode, mechanical mode, electric mode, hydraulic mode, pneumatic mode and the like). One end of the driving mechanism 32 is arranged on the base 1, and the other end is connected with the scissors supporting frame mechanism 31 through the middle rotating shaft 34 to drive the scissors supporting frame mechanism 31 to lift. The upper end of the scissors supporting frame mechanism 31 is connected with the platform body 2, the lower end is connected with the base 1, and the scissors supporting frame mechanism 31 is lifted, so that the lifting of the platform body 2 is realized.
Referring to fig. 5, in this embodiment, the scissors supporting stand mechanism 31 includes at least one set of scissors rest, each set of scissors rest includes a first scissors plate 311, a second scissors plate 312, a third scissors plate 313 and a fourth scissors plate 314, the middle part of the first scissors plate 311 and the middle part of the second scissors plate 312 are hinged together, the lower end of the first scissors plate 311 is hinged on the base 1, and the lower end of the second scissors plate 312 is disposed in a chute on one side of the base 1 through a roller; the upper end of the first shear plate 311 is hinged with the lower end of the fourth shear plate 314, and the upper end of the second shear plate 312 is hinged with the lower end of the third shear plate 313; the middle part of the third shear plate 313 is hinged with the middle part of the fourth shear plate 314, the upper end of the third shear plate 313 is arranged in a chute on one side of the platform body 2 through a roller, and the upper end of the fourth shear plate 314 is hinged on the platform body 2. The two sides of the scissors supporting frame mechanism are connected together through two synchronous anti-shake rods 33, the upper end of the first scissors plate 311 and the lower end of the fourth scissors plate 314 are hinged on one synchronous anti-shake rod 33, and the upper end of the second scissors plate 312 and the lower end of the third scissors plate 313 are hinged on the other synchronous anti-shake rod 33.
Referring to fig. 6, the caster assembly 4 includes four central control wheels 41 disposed on four casters of the base 1, wherein the front and rear sets of central control wheels 41 are three-gear central control wheels, and the front two casters are connected by a hexagonal axle 42; the rear two casters are connected by another hexagonal axle 42; the two hexagonal shafts 42 are connected by a connecting rod 43. When the pedal 44 is stepped on by foot (or controlled by hand-pulling rod), the hexagonal shaft 42 rotates, and the four central control wheels 41 can be simultaneously controlled to adjust the motion state of the moving platform by transmitting the rotation to the front hexagonal shaft 42 through the middle rod piece 43. The center wheel 41 has three states, namely a steering and traveling rotatable state, a traveling rotating (forward and backward movement) steering locking state and a full locking state.
After the platform body 2 is raised in place, the pins 55 are inserted into the corresponding pin holes. When the platform body 2 is required to descend, the driving mechanism 32 starts to unload force, and under the action of gravity, the platform body 2 starts to descend; when the landing body 2 descends to a certain height distance from the highest-order stair step, as the rack in the front-most railing of the landing body 2 is meshed with the gear 58 of the middle connecting block 54 of the highest-order stair step, the rack 56 drives the gear 58 to rotate, the gear 58 drives the bolt 55 to slowly withdraw from the bolt hole while rotating, and when the landing body 2 descends to be consistent with the height of the highest-order stair step, the bolt is completely separated from the bolt hole. At this time, the rack 56 and the gear 58 are kept in engagement, and the stair tread does not slip down even if the descent is stopped or the rise is made during this period. The highest-order stair steps descend along with the platform body 2; each step of stair steps descends with the platform body 2 in sequence until it is flush with the lowest step of stair steps.
When the platform body 2 is lowered to the lowest, the bolt 55 is completely separated from the bolt hole, when the driving mechanism 32 starts to apply force, the platform body 2 has an ascending trend, the highest-order stair steps have an ascending trend because the platform body 2 is connected with the highest-order stair steps, the rack 56 of the highest-order stair steps is meshed with the gear 58 of the next-order stair steps, the rack 56 moves upwards, the gear 58 rotates to drive the bolt 55 to move, but the bolt 55 cannot move because of blocking of the pipe wall, the gear 58 cannot rotate, and therefore the highest-order stair steps and the next-order stair steps are restrained together and cannot ascend upwards, and meanwhile, the force is transmitted to the next-order stair steps, and the ascending force is transmitted downwards in turn; when the lower-most stair step is transmitted to the lower-most stair step, the rack-less gear on the P-shaped guardrail handrail tube 52 is in an unconstrained state, the penultimate low-stair step bolt 55 just can extend out of the P-shaped tube bolt hole of the lower-most first-step stair step, the gear 58 rotates, and the penultimate low-stair step and other high-step stair steps and the platform body rise upwards together. When the platform is lifted to a set height, the gear 58 rotates at this time, the rack 56 is separated from the gear 58, the penultimate low stair step is positioned and stopped by the bolt, and the rest high-order stair steps move upwards together with the platform body 2; the pins for sequentially lifting the stair steps are sequentially positioned until the stair steps are in a completely lifted state. The middle can be stopped at any position, and can also be continuously lifted and lowered after stopping.
The foregoing has shown and described the basic principles and main structural features of the present invention. The present invention is not limited to the above examples, and various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The utility model provides a remove lift stair platform of marking time, includes base (1), sets up truckle subassembly (4) in base (1) bottom, sets up elevating gear (3) that go up and down in platform body (2) and drive platform body (2) of base (1) top, its characterized in that: the novel stair tread assembly comprises a stair tread assembly (5), wherein the stair tread assembly (5) comprises multiple steps of stair treads which are sequentially arranged from top to bottom, the highest first step of stair treads is fixedly connected with a platform body (2), the lowest first step of stair treads is fixedly connected with a base (1), each step of stair treads comprises a stair tread plate (51), and guardrail handrail pipes (52) and sleeves (53) which are arranged on two sides of the stair tread plate (51); the lower end of a guardrail handrail tube (52) of the upper stair step is sleeved in a sleeve (53) of the lower stair step;
a middle connecting block (54) is arranged between a guardrail handrail tube (52) and a sleeve (53) on the same side of the stair tread, a bolt (55), a swing arm (57) and a gear (58) are arranged on the middle connecting block (54), one end of the swing arm (57) is connected with the gear (58) through a hinge shaft, the other end of the swing arm is connected with one end of the bolt (55), the other end of the bolt (55) is matched with a bolt hole on the guardrail handrail tube (52), the gear (58) stretches into the sleeve (53), and a rack (56) matched with the gear (58) is arranged in the guardrail handrail tube (52) of the stair tread of the previous stage; the two steps of adjacent stair steps relatively move, the rack (56) of the stair step of the upper step drives the gear (58) of the lower step to rotate, drives the swing arm (57) to rotate, further drives the bolt (55) to move along the guide hole on the middle connecting block (54), and the bolt (55) is inserted into or retracted from the bolt hole;
the lifting device (3) comprises scissors supporting frame mechanisms (31) symmetrically arranged on two sides of the base (1) and a driving mechanism (32) for driving the scissors supporting frame mechanisms (31) to move, the upper end of each scissors supporting frame mechanism (31) is connected with the platform body (2), the lower end of each scissors supporting frame mechanism is connected with the base (1), one end of each driving mechanism (32) is arranged on the base (1), and the other end of each driving mechanism is connected with each scissors supporting frame mechanism (31) through an intermediate rotating shaft (34);
the scissors supporting frame mechanism (31) comprises at least one group of scissors rest, each group of scissors rest comprises a first scissors plate (311), a second scissors plate (312), a third scissors plate (313) and a fourth scissors plate (314), the middle part of the first scissors plate (311) is hinged with the middle part of the second scissors plate (312), the lower end of the first scissors plate (311) is hinged on the base (1), and the lower end of the second scissors plate (312) is arranged in a chute on one side of the base (1) through a roller; the upper end of the first shear plate (311) is hinged with the lower end of the fourth shear plate (314), and the upper end of the second shear plate (312) is hinged with the lower end of the third shear plate (313); the middle part of third scissors board (313) is articulated with the middle part of fourth scissors board (314) together, the upper end of third scissors board (313) is through the gyro wheel setting in the spout of platform body (2) one side, the upper end of fourth scissors board (314) articulates on platform body (2).
2. The mobile lift landing of claim 1, wherein: the scissors supporting frame mechanisms (31) on two sides are connected together through two synchronous anti-shake rods (33), the upper end of the first scissors plate (311) and the lower end of the fourth scissors plate (314) are hinged on one synchronous anti-shake rod (33), and the upper end of the second scissors plate (312) and the lower end of the third scissors plate (313) are hinged on the other synchronous anti-shake rod (33).
3. The mobile lift landing of claim 1, wherein: the driving mechanism (32) adopts a hydraulic cylinder or an air cylinder.
4. The mobile lift landing of claim 1, wherein: the caster wheel assembly (4) comprises four central control wheels (41) arranged on four feet of the base (1), wherein the central control wheels (41) have the functions of advancing, steering and braking and are connected with pedals (44) or a hand lever through hexagonal shafts (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811059332.1A CN108975240B (en) | 2018-09-12 | 2018-09-12 | Movable lifting stair platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811059332.1A CN108975240B (en) | 2018-09-12 | 2018-09-12 | Movable lifting stair platform |
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| Publication Number | Publication Date |
|---|---|
| CN108975240A CN108975240A (en) | 2018-12-11 |
| CN108975240B true CN108975240B (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811059332.1A Active CN108975240B (en) | 2018-09-12 | 2018-09-12 | Movable lifting stair platform |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110132630B (en) * | 2019-06-13 | 2024-02-27 | 福建省特种设备检验研究院 | Automatic adjustable step device for special robot test and use method thereof |
| US20210076557A1 (en) * | 2019-09-18 | 2021-03-18 | Cruiser Products, Llc | Vehicle for tending to agriculture and related methods |
| CN111268601B (en) * | 2020-02-16 | 2021-11-12 | 孙丹清 | Aerial work platform suitable for steel bridge construction |
| CN111249688B (en) * | 2020-02-19 | 2021-01-29 | 青岛大学附属医院 | Span-adjustable medical finger training ladder |
| CN111362102B (en) * | 2020-04-23 | 2023-08-11 | 福建快科城建增设电梯股份有限公司 | Villa stairway with elevator and working method thereof |
| CN112196109B (en) * | 2020-08-18 | 2021-12-17 | 山东鸿琨住工科技有限公司 | Assembled stacked board room |
| CN112319344B (en) * | 2020-10-30 | 2022-04-22 | 徐州徐工随车起重机有限公司 | Self-walking tunnel maintenance operation vehicle |
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| US2888182A (en) * | 1957-04-02 | 1959-05-26 | Lawrence J Nixon | Variable pitch stairs |
| KR200385098Y1 (en) * | 2004-12-29 | 2005-05-25 | 조미동 | Assembling type material stairs |
| CN106430019A (en) * | 2016-08-31 | 2017-02-22 | 天津航天液压装备有限公司 | Lifting platform |
| CN207079958U (en) * | 2017-08-22 | 2018-03-09 | 浙江宏超建设集团有限公司 | A kind of stair mouth protecting device |
| CN209291913U (en) * | 2018-09-12 | 2019-08-23 | 武汉沿程科技股份有限公司 | A kind of moving lifting landing |
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| Publication number | Publication date |
|---|---|
| CN108975240A (en) | 2018-12-11 |
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