CN109184545B - Portable safety maintenance ladder of heavy foot-controlled - Google Patents
Portable safety maintenance ladder of heavy foot-controlled Download PDFInfo
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- CN109184545B CN109184545B CN201811177843.3A CN201811177843A CN109184545B CN 109184545 B CN109184545 B CN 109184545B CN 201811177843 A CN201811177843 A CN 201811177843A CN 109184545 B CN109184545 B CN 109184545B
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- 238000012423 maintenance Methods 0.000 title claims abstract description 47
- 230000007246 mechanism Effects 0.000 claims abstract description 79
- 238000003825 pressing Methods 0.000 claims abstract description 30
- 230000006835 compression Effects 0.000 claims description 31
- 238000007906 compression Methods 0.000 claims description 31
- 230000008859 change Effects 0.000 abstract description 4
- 230000009471 action Effects 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
- E06C1/397—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders characterised by having wheels, rollers, or runners
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/42—Ladder feet; Supports therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Abstract
The invention discloses a heavy foot-controlled movable safety maintenance ladder, which comprises a truss and pedals, wherein universal wheels are arranged at the bottom of the truss, the universal wheels are movably arranged in guide sleeves fixed on the truss through guide rods, the guide rods are controlled by a foot-operated control mechanism to adjust the height change, the foot-operated control mechanism comprises a front crank mechanism, a rear crank mechanism and a connecting rod, the front crank mechanism comprises a front support and a front crank hinged on the front support, the rear crank mechanism comprises a rear support and a rear crank hinged on the rear support, a front pressing arm and a front swing arm are arranged on the front crank, a rear pressing arm and a rear swing arm are arranged on the rear crank, the front swing arm and the rear swing arm are connected through the connecting rod, and a locking mechanism for fixing the rotation of the foot-operated control mechanism is arranged on the rear swing arm. The invention aims to provide a heavy foot-controlled movable safety maintenance ladder which is simple in structure, convenient to operate and convenient to move.
Description
Technical Field
The invention belongs to the comprehensive technical field of special tools, maintenance equipment, safety protection and the like, and particularly relates to a heavy foot-controlled movable safety maintenance ladder.
Background
With the continuous progress of scientific technology in China, a large number of large-scale weapons are assembled in a part array, the maintenance and guarantee of the weapons becomes an important link affecting the combat power of the army, and the maintenance of the large-scale weapons often need to use working ladders. The ladder is a tool for climbing by force as a common tool in daily life work of people. At present, a common straight ladder, a herringbone ladder, a telescopic ladder, a goods shelf ladder and the like which are mainly made of aluminum alloy, stainless steel pipes, wood and the like. However, these conventional ladders expose many problems in the maintenance of the base level of large-scale equipment, firstly, simple ladders made of stainless steel and other materials cannot meet the bearing problem of equipment maintenance, and often, large-scale tool tools and spare parts are required to be used for the maintenance of large-scale weapon equipment, so that the ladders are required to bear large weight during carrying, and the safety requirements are met; secondly, the simple ladder cannot meet the operation requirements of multiple people and groups, and maintenance and guarantee of large equipment often requires multiple people to cooperatively operate, and meanwhile, the large equipment is stepped on and carried; thirdly, the maintenance operation of the large-scale equipment requires that the ladder can be conveniently and rapidly moved to different maintenance positions of the equipment; finally, the handling mechanism of the maintenance ladder should be simple and lightweight.
In summary, in order to meet the maintenance and guarantee work requirements of large equipment, improve the maintenance efficiency and reduce the maintenance risk, a heavy foot-controlled movable safety maintenance ladder needs to be developed to realize the maintenance operation with large bearing, portability, convenient operation and safety.
Disclosure of Invention
The invention aims to provide a heavy foot-controlled movable safety maintenance ladder which is simple in structure, convenient to operate and convenient to move.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides a portable safety maintenance ladder of heavy foot control formula, includes truss and footboard, the truss bottom is equipped with the universal wheel, universal wheel pass through guide arm movable mounting in fix in the guide pin bushing on the truss, the guide arm is controlled by foot-operated control mechanism and is adjusted the high variation, foot-operated control mechanism is including preceding crank arm mechanism, back crank arm mechanism and connecting rod, preceding crank arm mechanism includes the fore-stock and articulates preceding crank arm on the fore-stock, back crank arm mechanism includes back support and articulates back crank arm on the back support, be equipped with preceding arm and preceding swing arm on the preceding crank arm, be equipped with back arm and back swing arm on the back crank arm, preceding arm and back press arm with guide arm swing joint, for the guide arm provides thrust on the vertical direction, preceding swing arm and back swing arm pass through the connecting rod is connected, be equipped with on the back swing arm and be used for fixing foot-operated control mechanism pivoted locking mechanism.
Preferably, a first compression spring is arranged between the guide rod and the guide sleeve; the first compression spring is sleeved on the guide rod and fixed through a shoulder arranged on the guide rod; the guide arm top is equipped with the gyro wheel, the guide arm is through gyro wheel and preceding pressure arm and back pressure arm sliding connection, and its beneficial effect lies in: the spring provides restoring force for the guide wheel, the guide rod is automatically contracted into the truss under the condition that the guide rod is not pushed downwards, and the universal wheel can not fall down automatically under the action of gravity under the condition that the maintenance ladder is overhead, so that the carrying of the truss is affected.
Preferably, the front pressing arm and the rear pressing arm are provided with sliding grooves, and the guide rod is connected in the sliding grooves in a sliding manner through a pin shaft; the beneficial effects are that: the guide rod is connected in the sliding grooves formed in the front pressing arm and the rear pressing arm in a sliding mode through the pin shaft, so that the guide rod can move up and down along with the front pressing arm and the rear pressing arm, and a linkage effect is achieved.
Preferably, the front pressing arm is provided with a pedal plate, and the pedal plate protrudes out of the truss; the beneficial effects are that: the force application of constructors is facilitated.
Preferably, be equipped with the stopper on the fore-stock, its beneficial effect lies in: the device has a limiting function on the rotation angle of the front crank arm and also has a protecting function on the whole pedal control mechanism.
Preferably, the locking mechanism comprises a first movable rod and a second movable rod hinged with the first movable rod, a U-shaped clamping groove is formed in the hinge joint of the first movable rod and the second movable rod, and a clamping mechanism for limiting the second movable rod to be separated from the first movable rod is arranged on the side wall of the clamping groove; the clamping mechanism is unlocked by upwards jacking force provided by an unlocking rod hinged to the tail part of the truss; the beneficial effects are that: the clamping groove is used for hinging the second connecting rod, the opening structure of the clamping groove plays a role in guiding the second connecting rod, and the upper top plate plays a limiting role on the second connecting rod.
Preferably, the clamping mechanism comprises a cavity, an ejector rod and a second compression spring; one end of the ejector rod with a wedge-shaped end part is arranged in the cavity, and the other end of the ejector rod penetrates through the side wall of the clamping groove; the second compression spring is arranged between the ejector rod and the cavity and provides elasticity for the ejector rod; the beneficial effects are that: the structure is simple, the manufacturing cost is low, the second connecting rod is locked by using the restoring force of the second compression spring to support the ejector rod, and the second connecting rod and the first connecting rod are positioned on a straight line.
Preferably, the end of the unlocking rod is provided with a top block matched with the clamping groove, the upper end of the top block is provided with a groove, and the groove is matched with the wedge-shaped structure of the ejector rod; the beneficial effects are that: the groove is a finish machining surface, the surface roughness is smaller than 3.2, and the groove is a smooth surface, so that the friction force between the ejector block and the ejector rod is greatly reduced, the whole unlocking process is smooth and reliable, the structural strength of the contact surface is improved, the phenomenon of stress concentration is reduced, and the service life of parts is prolonged.
Preferably, an extension spring is arranged between the first movable rod and the second movable rod, and the beneficial effects of the extension spring are that: providing an auxiliary restoring force to the first compression spring; the guide rod can also be connected in the chute in a sliding way through a pin shaft, and when the guide rod is not provided with the first compression spring, the extension spring provides restoring force for the pedal control mechanism.
Compared with the prior art, the invention has the beneficial effects that 1, no electric drive is needed, a purely mechanical design mode is adopted, and the applicability of field operation of equipment is enhanced; 2. the operation is quick and convenient, and the preparation time in the maintenance process is greatly reduced; 3. the maintenance ladder can meet the requirement of cooperative operation of multiple persons, and meanwhile, the maintenance ladder can be stepped on and carried; 4. the mechanical structure is simple, the equipment is light, and the quick movement is convenient.
Drawings
FIG. 1 is a schematic view of a movable safety maintenance ladder with heavy foot control according to one embodiment;
FIG. 2 is a schematic view of a part of a movable safety maintenance ladder with a heavy duty foot control according to the embodiment;
fig. 3 is a schematic structural view of the locking mechanism in a locked state;
fig. 4 is a schematic structural view of the locking mechanism in an unlocked state;
FIG. 5 is a schematic view of a heavy foot-controlled mobile safety maintenance ladder according to two embodiments;
FIG. 6 is a schematic view of a heavy foot-controlled mobile safety maintenance ladder according to three embodiments;
in the figure: 1. a guide rod; 1-1, a shoulder; 2. a first compression spring; 3. a roller; 4. a universal wheel; 5. guide sleeve; 6. a locking mechanism; 61. a clamping groove; 62. a first movable lever; 63. a second movable rod; 64. a clamping mechanism; 641. a cavity; 642. a second compression spring; 643. a push rod; 7. a front crank arm mechanism; 71. a front swing arm; 72. a front pressing arm; 72-1, foot pedals; 72-2, a chute; 73. a front bracket; 73-1, limiting blocks; 8. a connecting rod; 9. a rear crank arm mechanism; 91. a rear swing arm; 92. a rear pressing arm; 93. a rear bracket; 10. unlocking the rod; 10-1, a top block; 11. truss; 12. a pedal; 13. and (5) stretching the spring.
The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on embodiments of the present invention, are within the scope of the present invention.
Example 1
As shown in fig. 1 to 4, a heavy foot-controlled movable safety maintenance ladder comprises a truss 11 and a pedal 12, wherein a universal wheel 4 is arranged at the bottom of the truss 11, the universal wheel 4 is movably mounted in a guide sleeve 5 fixed on the truss 11 through a guide rod 1, the guide rod 1 is controlled and adjusted to be high in change by a foot-operated control mechanism, the foot-operated control mechanism comprises a front crank mechanism 7, a rear crank mechanism 9 and a connecting rod 8, the front crank mechanism 7 comprises a front bracket 73 and a front crank hinged on the front bracket 73, the rear crank mechanism 9 comprises a rear bracket 93 and a rear crank hinged on the rear bracket 93, a front press arm 72 and a front swing arm 71 are arranged on the front crank, a rear press arm 92 and a rear swing arm 91 are arranged on the rear crank, the front press arm 72 and the rear press arm 92 are movably connected with the guide rod 1, and a locking mechanism 6 for fixing the rotation of the foot-operated control mechanism is arranged on the rear swing arm 91.
Preferably, a first compression spring 2 is arranged between the guide rod 1 and the guide sleeve 5; the first compression spring 2 is sleeved on the guide rod 1 and fixed through a shoulder 1-1 arranged on the guide rod 1; the top of the guide rod 1 is provided with a roller 3, and the guide rod 1 is in sliding connection with the front pressing arm 72 and the rear pressing arm 92 through the roller 3; the front pressing arm 72 is provided with a pedal plate 72-1, and the pedal plate protrusion 72-1 is out of the truss; a limiting block 73-1 is arranged on the front bracket 73; the locking mechanism 6 comprises a first movable rod 62 and a second movable rod 63 hinged with the first movable rod 62, a U-shaped clamping groove 61 is arranged at the end part of the first movable rod 62, and a clamping mechanism 64 for limiting the second movable rod 63 to be separated from the first movable rod 62 is arranged on the side wall of the clamping groove 61; the locking mechanism 64 is unlocked by upward jacking force provided by an unlocking rod 10 hinged at the tail part of the truss 11; the locking mechanism 64 includes a cavity 641, an ejector rod 643, and a second compression spring 642; one end of the ejector rod 643 with a wedge-shaped end part is arranged in the cavity 641, and the other end of the ejector rod penetrates through the side wall of the clamping groove 61; the second compression spring 642 is disposed between the push rod 643 and the cavity 641, and provides elastic force to the push rod 643; the end of the unlocking rod 10 is provided with a top block 10-1 matched with the clamping groove 61, the upper end of the top block 10-1 is provided with a groove, and the groove is matched with the wedge-shaped structure of the ejector rod 643.
When the maintenance ladder needs to be moved, a worker only needs to step down on the pedal 72-1 by feet, at this time, the front pressing arm 72 pushes the guide rod 1 arranged at the front end to move downwards, the rear pressing arm 92 pushes the guide rod arranged at the rear end to synchronously move downwards under the driving action of the connecting rod 8, so that the universal wheel stretches out of the truss 11 to lift the truss off the ground, meanwhile, the first movable rod 62 hinged on the rear swinging arm 91 moves forwards, the first movable rod 62 and the second movable rod 63 are slowly caused to move towards a straight line, and when the first movable rod 62 and the second movable rod 63 are completely in the straight line, the ejector rod 643 stretches out of a side wall opening of the clamping groove 61 under the action of the second compression spring to lock the second movable rod 63; when the maintenance ladder moves to the designated position, a worker only needs to step down on the unlocking rod 10 by feet, at this time, the ejector block 10-1 arranged at the end part of the unlocking rod 10 moves upwards, the ejector rod 643 is extruded and pushed to two side edges of the clamping groove 61 by overcoming the elastic force of the second compression spring until the second movable rod is separated from the limit of the ejector rod 643 and is in a movable state, and meanwhile, the guide rod receives the universal wheel 4 into the truss 11 under the action of the restoring force of the first compression spring 2, so that the maintenance ladder is grounded, and more stable supporting acting force is provided by the ground.
Example two
As shown in fig. 5, a heavy foot-controlled movable safety maintenance ladder comprises a truss 11 and a pedal 12, wherein a universal wheel 4 is arranged at the bottom of the truss 11, the universal wheel 4 is movably installed in a guide sleeve 5 fixed on the truss 11 through a guide rod 1, the guide rod 1 is controlled and adjusted to be high in change by a foot-operated control mechanism, the foot-operated control mechanism comprises a front crank mechanism 7, a rear crank mechanism 9 and a connecting rod 8, the front crank mechanism 7 comprises a front bracket 73 and a front crank hinged on the front bracket 73, the rear crank mechanism 9 comprises a rear bracket 93 and a rear crank hinged on the rear bracket 93, a front press arm 72 and a front swing arm 71 are arranged on the front crank, a rear press arm 92 and a rear press arm 91 are arranged on the rear crank, the front press arm 72 and the rear press arm 92 are movably connected with the guide rod 1, and a locking mechanism 6 for fixing the foot-operated control mechanism to rotate is arranged on the rear swing arm 91.
Preferably, a first compression spring 2 is arranged between the guide rod 1 and the guide sleeve 5; the first compression spring 2 is sleeved on the guide rod 1 and fixed through a shoulder 1-1 arranged on the guide rod 1; the front pressing arm 72 and the rear pressing arm 92 are provided with a chute 14, and the guide rod 1 is slidably connected in the chute 14 through a pin shaft; the front pressing arm 72 is provided with a pedal plate 72-1, and the pedal plate protrusion 72-1 is out of the truss; a limiting block 73-1 is arranged on the front bracket 73; the locking mechanism 6 comprises a first movable rod 62 and a second movable rod 63 hinged with the first movable rod 62, a U-shaped clamping groove 61 is arranged at the end part of the first movable rod 62, and a clamping mechanism 64 for limiting the second movable rod 63 to be separated from the first movable rod 62 is arranged on the side wall of the clamping groove 61; the locking mechanism 64 is unlocked by upward jacking force provided by an unlocking rod 10 hinged at the tail part of the truss 11; the locking mechanism 64 includes a cavity 641, an ejector rod 643, and a second compression spring 642; one end of the ejector rod 643 with a wedge-shaped end part is arranged in the cavity 641, and the other end of the ejector rod penetrates through the side wall of the clamping groove 61; the second compression spring 642 is disposed between the push rod 643 and the cavity 641, and provides elastic force to the push rod 643; the end of the unlocking rod 10 is provided with a top block 10-1 matched with the clamping groove 61, the upper end of the top block 10-1 is provided with a groove, and the groove is matched with the wedge-shaped structure of the ejector rod 643.
When the maintenance ladder needs to be moved, a worker only needs to step down on the pedal 72-1 by feet, at this time, the front pressing arm 72 pushes the guide rod 1 arranged at the front end to move downwards, the rear pressing arm 92 pushes the guide rod arranged at the rear end to synchronously move downwards under the driving action of the connecting rod 8, so that the universal wheel stretches out of the truss 11 to lift the truss off the ground, meanwhile, the first movable rod 62 hinged on the rear swinging arm 91 moves forwards, the first movable rod 62 and the second movable rod 63 are slowly caused to move towards a straight line, and when the first movable rod 62 and the second movable rod 63 are completely in the straight line, the ejector rod 643 stretches out of a side wall opening of the clamping groove 61 under the action of the second compression spring to lock the second movable rod 63; when the maintenance ladder moves to the designated position, a worker only needs to step down on the unlocking rod 10 by feet, at this time, the ejector block 10-1 arranged at the end part of the unlocking rod 10 moves upwards, the ejector rod 643 is extruded and pushed to two side edges of the clamping groove 61 by overcoming the elastic force of the second compression spring until the second movable rod is separated from the limit of the ejector rod 643 and is in a movable state, and meanwhile, the guide rod receives the universal wheel 4 into the truss 11 under the action of the restoring force of the first compression spring 2, so that the maintenance ladder is grounded, and more stable supporting acting force is provided by the ground.
Example III
As shown in fig. 6, a heavy foot-controlled movable safety maintenance ladder comprises a truss 11 and a pedal 12, wherein a universal wheel 4 is arranged at the bottom of the truss 11, the universal wheel 4 is movably mounted in a guide sleeve 5 fixed on the truss 11 through a guide rod 1, the guide rod 1 is controlled and adjusted to be high in change by a foot-operated control mechanism, the foot-operated control mechanism comprises a front crank mechanism 7, a rear crank mechanism 9 and a connecting rod 8, the front crank mechanism 7 comprises a front bracket 73 and a front crank hinged on the front bracket 73, the rear crank mechanism 9 comprises a rear bracket 93 and a rear crank hinged on the rear bracket 93, a front press arm 72 and a front swing arm 71 are arranged on the front crank, a rear press arm 92 and a rear press arm 91 are arranged on the rear crank, the front press arm 72 and the rear press arm 92 are movably connected with the guide rod 1, and a locking mechanism 6 for fixing the foot-operated control mechanism to rotate is arranged on the rear swing arm 91.
Preferably, the front pressing arm 72 and the rear pressing arm 92 are provided with a chute 14, and the guide rod 1 is slidably connected in the chute 14 through a pin shaft; the front pressing arm 72 is provided with a pedal plate 72-1, and the pedal plate protrusion 72-1 is out of the truss; a limiting block 73-1 is arranged on the front bracket 73; the locking mechanism 6 comprises a first movable rod 62 and a second movable rod 63 hinged with the first movable rod 62, a U-shaped clamping groove 61 is arranged at the end part of the first movable rod 62, and a clamping mechanism 64 for limiting the second movable rod 63 to be separated from the first movable rod 62 is arranged on the side wall of the clamping groove 61; the locking mechanism 64 is unlocked by upward jacking force provided by an unlocking rod 10 hinged at the tail part of the truss 11; the locking mechanism 64 includes a cavity 641, an ejector rod 643, and a second compression spring 642; one end of the ejector rod 643 with a wedge-shaped end part is arranged in the cavity 641, and the other end of the ejector rod penetrates through the side wall of the clamping groove 61; the second compression spring 642 is disposed between the push rod 643 and the cavity 641, and provides elastic force to the push rod 643; the end part of the unlocking rod 10 is provided with a top block 10-1 matched with the clamping groove 61, the upper end of the top block 10-1 is provided with a groove, and the groove is matched with the wedge-shaped structure of the ejector rod 643; an extension spring 13 is arranged between the first movable rod 62 and the second movable rod 63.
When the maintenance ladder needs to be moved, a worker only needs to step down on the pedal 72-1 by feet, at this time, the front pressing arm 72 pushes the guide rod 1 arranged at the front end to move downwards, the rear pressing arm 92 pushes the guide rod arranged at the rear end to synchronously move downwards under the driving action of the connecting rod 8, so that the universal wheel stretches out of the truss 11 to lift the truss off the ground, meanwhile, the first movable rod 62 hinged on the rear swinging arm 91 moves forwards, the first movable rod 62 and the second movable rod 63 are slowly caused to move towards a straight line, and when the first movable rod 62 and the second movable rod 63 are completely in the straight line, the ejector rod 643 stretches out of a side wall opening of the clamping groove 61 under the action of the second compression spring to lock the second movable rod 63; when the ladder to be maintained moves to a designated position, a worker only needs to step down on the unlocking rod 10 by feet, at this time, the ejector block 10-1 arranged at the end part of the unlocking rod 10 moves upwards, the ejector rod 643 is extruded and pushed to two sides of the clamping groove 61 by overcoming the elastic force of the second compression spring until the second movable rod is separated from the limit of the ejector rod 643 and is in a movable state, and meanwhile, the guide rod is driven by the front crank arm mechanism 7, the rear crank arm mechanism 9 and the connecting rod 8 under the restoring force of the tension spring 13, and the universal wheel 4 is retracted into the truss 11, so that the ladder to be maintained is grounded, and a more stable supporting acting force is provided by the ground.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a portable safety maintenance ladder of heavy foot control formula, includes truss and footboard, its characterized in that, the truss bottom is equipped with the universal wheel, the universal wheel passes through guide arm movable mounting in the guide pin bushing of fixing on the truss, the guide arm is controlled the height variation by foot-operated control mechanism, foot-operated control mechanism includes preceding crank arm mechanism, back crank arm mechanism and connecting rod, preceding crank arm mechanism includes the front bracket and articulates preceding crank arm on the front bracket, back crank arm mechanism includes the back bracket and articulates back crank arm on the back bracket, be equipped with preceding arm and preceding swing arm on the front crank arm, preceding arm is equipped with the running-board, the running-board protrusion truss, be equipped with back arm and back swing arm on the back crank arm, preceding swing arm and back swing arm pass through the connecting rod is connected, be equipped with on the back swing arm and be used for fixing foot-operated control mechanism pivoted locking mechanism; the locking mechanism comprises a first movable rod and a second movable rod hinged with the first movable rod, a U-shaped clamping groove is formed in the hinged position of the first movable rod and the second movable rod, and a clamping mechanism for limiting the second movable rod to be separated from the first movable rod is arranged on the side wall of the clamping groove; the clamping mechanism is unlocked by upwards jacking force provided by an unlocking rod hinged to the tail of the truss.
2. A heavy duty foot controlled mobile safety maintenance ladder according to claim 1, wherein: a first compression spring is arranged between the guide rod and the guide sleeve; the first compression spring is sleeved on the guide rod and fixed through a shoulder arranged on the guide rod; the top of the guide rod is provided with a roller, and the guide rod is in sliding connection with the front pressing arm and the rear pressing arm through the roller.
3. A heavy duty foot controlled mobile safety maintenance ladder according to claim 1, wherein: the front pressing arm and the rear pressing arm are provided with sliding grooves, and the guide rod is connected in the sliding grooves in a sliding mode through a pin shaft.
4. A heavy duty foot controlled mobile safety maintenance ladder according to claim 1, wherein: and a limiting block is arranged on the front bracket.
5. A heavy duty foot controlled mobile safety maintenance ladder according to claim 1, wherein: the clamping mechanism comprises a cavity, an ejector rod and a second compression spring; one end of the ejector rod with a wedge-shaped end part is arranged in the cavity, and the other end of the ejector rod penetrates through the side wall of the clamping groove; the second compression spring is arranged between the ejector rod and the cavity and provides elasticity for the ejector rod.
6. A heavy duty foot controlled mobile safety maintenance ladder according to claim 5, wherein: the end of the unlocking rod is provided with a jacking block matched with the clamping groove, the upper end of the jacking block is provided with a bevel, and the bevel is matched with the wedge-shaped structure of the ejector rod.
7. A heavy duty foot controlled mobile safety maintenance ladder according to claim 1, wherein: an extension spring is arranged between the first movable rod and the second movable rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811177843.3A CN109184545B (en) | 2018-10-10 | 2018-10-10 | Portable safety maintenance ladder of heavy foot-controlled |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811177843.3A CN109184545B (en) | 2018-10-10 | 2018-10-10 | Portable safety maintenance ladder of heavy foot-controlled |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109184545A CN109184545A (en) | 2019-01-11 |
| CN109184545B true CN109184545B (en) | 2024-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811177843.3A Active CN109184545B (en) | 2018-10-10 | 2018-10-10 | Portable safety maintenance ladder of heavy foot-controlled |
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| CN (1) | CN109184545B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113003482B (en) * | 2021-02-05 | 2022-01-18 | 浙江柯工智能***有限公司 | AGV (automatic guided vehicle) matched with wire vehicle |
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| CN207144798U (en) * | 2017-10-24 | 2018-03-27 | 石家庄华泰电力工具有限公司 | The step ladder being moved easily |
| CN209959161U (en) * | 2018-10-10 | 2020-01-17 | 中国人民解放军63981部队 | Heavy movable foot-controlled safety maintenance ladder |
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Also Published As
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| CN109184545A (en) | 2019-01-11 |
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