Mountain ladder and spring plug resetting tool

Abstract

The invention relates to the technical field of ladders, and discloses a mountain ladder and a spring plug reset tool, the mountain ladder comprises two ladder frames, telescopic sharp bolt mechanisms and a movable cross beam, and the telescopic sharp bolt mechanisms are arranged in all ladder legs; the telescopic sharp bolt mechanism comprises a limiting rod, a transverse bevel gear and a rocking handle transmission mechanism, the limiting rod comprises a threaded driving section, a limiting section and a conical drilling section, the transverse bevel gear is arranged in the ladder leg, a threaded through hole is formed in the middle of the transverse bevel gear, and the threaded driving section is meshed with an internal thread of the threaded through hole; the rocking handle transmission mechanism comprises a rocking handle and a longitudinal bevel gear linked with the rocking handle, the longitudinal bevel gear is meshed with the transverse bevel gear to achieve power transmission, and a speed reduction device is arranged in the rocking handle transmission mechanism to achieve labor saving; a plurality of hole sites are formed in the two ends of the movable cross beams; the movable cross beams are detachably connected with the cross beam mounting positions on the side surfaces of the ladder legs through cross beam clamping nails and fixing nuts. The mountain ladder effectively enhances the stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ladders, in particular to a mountain ladder and a spring plug resetting tool. BACKGROUND

[0002] In the field of photovoltaic power generation, the installation and maintenance of photovoltaic modules are usually carried out in complex terrain (such as mountains, slopes, etc.).

[0003] The traditional herringbone ladder design works well on flat ground, but when used on slopes or uneven ground, it is prone to sliding due to uneven terrain, which poses a safety hazard. SUMMARY

[0004] Therefore, the present application provides a mountain ladder to solve the problem that the traditional herringbone ladder is prone to sliding when used on slopes or uneven ground.

[0005] In a first aspect, the present application provides a mountain ladder, comprising: two ladder frames arranged symmetrically, each ladder frame being composed of two ladder legs and a horizontal rod fixed between the two ladder legs, and the heads of the two ladder frames being hinged.

[0006] All the ladder legs are internally provided with a tubular cavity with an open bottom end, and a telescopic stud mechanism is arranged in the tubular cavity.

[0007] The limiting rod comprises a threaded driving section, a limiting section and a conical ground drilling section from top to bottom.

[0008] A transverse bevel gear is arranged inside the ladder leg, and a threaded through hole is arranged in the middle of the transverse bevel gear, and the threaded driving section is engaged with the internal thread of the threaded through hole.

[0009] The rocking lever transmission mechanism comprises a rocking lever and a longitudinal bevel gear linked with the rocking lever, and the longitudinal bevel gear is engaged with the transverse bevel gear to realize power transmission.

[0010] The mountain ladder further comprises a movable cross beam, the two ends of which are provided with a plurality of hole positions, and the movable cross beam is detachably connected with the cross beam mounting position on the side surface of the ladder leg through cross beam clamps and fixed nuts.

[0011] When the operator shakes the handle, the longitudinal helical gear in the handle transmission mechanism rotates, driving the horizontal helical gear to rotate through the meshing relationship. Since the threaded through hole in the middle of the horizontal helical gear is engaged with the threaded driving section of the limiting rod, the limiting rod is driven to extend downward into the tubular cavity of the ladder leg, so that the conical ground-penetrating section penetrates into the ground. Reverse shaking of the handle can make the limiting rod retract. When adjusting the angle of the ladder frame, the hole positions at the two ends of the movable crossbeam can be aligned with the crossbeam clamps on the side surface of the ladder leg at different crossbeam mounting positions. By locking with the fixing nuts, the adaptation to different slope terrains is achieved. This working mode makes the mountain ladder effectively enhance the stability in complex terrain through the ground-penetrating fixation of the telescopic pointed bolt mechanism, avoiding sliding or toppling. The adjustable connection of the movable crossbeam realizes flexible adaptation to different slopes, expands the application range, and ensures the stability of the ladder frame structure during operation through the locking of the crossbeam clamps and the fixing nuts, thereby improving the operation safety.

[0012] In an alternative embodiment, the limiting section is a smooth cylindrical rod, which is symmetrically provided with at least one pair of spring plugs;

[0013] The side wall of the ladder leg is axially provided with a plurality of limiting holes corresponding to the positions of the spring plugs. When the limiting rod moves downward, the spring plugs are ejected and clamped into the limiting holes.

[0014] When the limiting rod moves downward, the spring plugs symmetrically arranged on the limiting section move downward. When the spring plugs are aligned with the limiting holes axially provided on the side wall of the ladder leg, the spring is released to push the plug to pop out and be clamped into the corresponding limiting hole. During this process, the smooth cylindrical rod-shaped limiting section provides stable support for the spring plug, and the symmetrically arranged spring plugs enhance the fixing effect through bidirectional clamping. The plurality of limiting holes are distributed along the axis of the ladder leg, which can adapt to different depths of the limiting rod and achieve stepwise fixation.

[0015] In an alternative embodiment, the spring plug comprises:

[0016] The plunger head has a hemispherical protrusion at the outer end, and the plunger head is slidingly arranged in the plug mounting groove on the side of the limiting section;

[0017] The radial compression spring is in the plug mounting groove on the side of the limiting section;

[0018] The limiting flange is fixed to the plunger head to limit the maximum pop-out displacement of the plunger head;

[0019] When the limiting rod moves downward, the plug mounting groove of the limiting section moves to align with the limiting hole, and the radial compression spring pushes the plunger head to pop out and be clamped into the limiting hole.

[0020] The design realizes automatic clamping and limiting during the downward movement of the limiting rod by the cooperation of the radial compression spring and the plunger head; when it is necessary to adjust the depth of the limiting rod, the plunger head is pressed into the plug installation groove by using the spring plug reset tool, and the limiting rod can continue to be adjusted.

[0021] In an optional embodiment, the crank transmission mechanism is provided with a built-in speed reduction device to convert the smaller force at the crank rotating end into a larger force at the crank gear end.

[0022] When the operator rotates the crank, the built-in speed reduction device in the crank transmission mechanism converts the smaller force applied at the crank rotating end into a larger driving force at the crank gear end through gear meshing transmission. The speed reduction device uses the way of driving the pinion gear by the large gear or multi-stage gear transmission to reduce the rotation speed while amplifying the torque, so that the operator only needs to apply a smaller force to drive the threaded driving section of the limiting rod to rotate through the meshing of the longitudinal helical gear and the transverse helical gear, realizing the stable extension and contraction of the limiting rod.

[0023] In an optional embodiment, the tapered earth boring section surface is provided with a helical continuous thread.

[0024] In an optional embodiment, the hole position of the moving cross beam is a polygonal structure matching the cross section shape of the cross beam clamping nail.

[0025] The multi-edge structure of the polygonal shape enables the moving cross beam to be accurately positioned when adjusted at multiple angles, and cooperates with the multiple cross beam mounting positions distributed along the ladder leg side surface to adapt to the terrain requirements of different slopes, ensuring that the ladder remains structurally stable in complex terrain and improving the stability and safety of the work surface.

[0026] In an optional embodiment, the ladder legs are made of aluminum alloy or carbon fiber material, and the ladder frames are connected by folding hinges to realize overall folding.

[0027] The ladder legs are made of aluminum alloy or carbon fiber material, which effectively reduces the overall weight of the ladder while ensuring the structural strength of the ladder legs. The ladder frames are connected by folding hinges, and when it is necessary to store or transport, the operator can rotate the two ladder frames around the hinge to fold the ladder frames along the folding hinges. After folding, the volume of the ladder is significantly reduced, which is convenient for storing in the trunk of a vehicle or a narrow space. When unfolded for use, the ladder frames are unfolded to the desired angle around the folding hinges, and the angle of the ladder frames is fixed by the cooperation of the moving cross beam and the cross beam clamping nail.

[0028] In an optional embodiment, at least two cross beam mounting positions are provided in the upper part of the ladder leg for fixing the moving cross beam when adjusted at multiple angles.

[0029] When the angle of the ladder frame needs to be adjusted to adapt to different slope terrains, the operator can align the polygonal hole positions at the two ends of the movable cross beam with the cross beam mounting positions at different heights of the upper portions of the ladder legs, and lock them by the fixing nuts. The at least two cross beam mounting positions provided on the upper portions of the ladder legs are distributed in the axial direction, thereby providing multiple selectable fixing positions for the movable cross beam.

[0030] The second aspect also provides a spring plug resetting tool for a mountain ladder, comprising an operating handle, a pressing plate, two rotating members, two tension rods and two hook-shaped pressing heads.

[0031] The two rotating members, the two tension rods and the two hook-shaped pressing heads are symmetrically arranged, and the inner ends of the hook-shaped pressing heads are respectively hinged to the tension rods.

[0032] The rotating member is in abutment with one end of the pressing plate and is hinged to the other end of the tension rod.

[0033] When the operating handle is pressed downward, the pressing plate is driven, the end of the rotating member is pressed downward, and the hook-shaped pressing heads are moved toward each other by the rotating member and the tension rod.

[0034] In an alternative embodiment, a cross beam is further included, the two hook-shaped pressing heads are respectively slidably arranged on the cross beam, and the two hook-shaped pressing heads are connected by a first spring.

[0035] The rotating member is in abutment with one end of the pressing plate and is hinged to the other end of the tension rod.

[0036] When the plunger head needs to be pressed into the plug mounting groove, the spring plug resetting tool is placed on the two ladder legs of the ladder frame, and the shorter end of the rotating member is in abutment with the plunger head on the two ladder legs. At this time, the operator presses the operating handle downward, the operating handle drives the pressing plate to move downward, the rotating member is L-shaped, and the bending part of the rotating member is hinged to the shell. During the downward movement of the pressing plate, the pressing plate pushes the horizontal segment of the rotating member downward, so that the rotating member rotates in the plane with the hinge point as the axis. The vertical segment of the rotating member pulls the tension rod to move obliquely upward through the hinged relationship, and further drives the hook-shaped pressing head hinged to the tension rod to move toward each other in the horizontal direction. Since the two rotating members, the tension rods and the hook-shaped pressing heads are symmetrically arranged, the two hook-shaped pressing heads will synchronously press the plunger head of the spring plug inward, so that it is retracted into the plug mounting groove against the elastic force of the radial compression spring. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort based on these drawings.

[0038] Figure 1 A structural schematic diagram of a mountain ladder of an embodiment of the present application (only showing the telescopic pointed bolt mechanism on one ladder leg);

[0039] Figure 2 A structural schematic diagram of the other side of a mountain ladder of an embodiment of the present application (only showing the telescopic pointed bolt mechanism on one ladder leg);

[0040] Figure 3 A structural schematic diagram of a telescopic pointed bolt mechanism of an embodiment of the present application;

[0041] Figure 4 A structural schematic diagram of a spring plug resetting tool of an embodiment of the present application.

[0042] Explanation of reference signs:

[0043] 1, ladder frame; 101, cross beam mounting position; 102, limiting hole;

[0044] 21, limiting rod; 22, transverse helical gear; 23, rocking handle; 24, longitudinal helical gear;

[0045] 3, moving cross beam;

[0046] 4, spring plug;

[0047] 5, operation handle;

[0048] 6, pressing piece;

[0049] 7, rotating member;

[0050] 8, tension rod;

[0051] 9, hook-shaped pressing head;

[0052] 10, cross beam;

[0053] 11, shell. EMBODIMENT

[0054] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0055] In the field of photovoltaic power generation, the installation and maintenance of photovoltaic modules usually need to be carried out in complex terrain (such as mountains, slopes, etc.).

[0056] The traditional herringbone ladder design works well on flat ground, but when used on slopes or uneven ground, it is prone to sliding due to uneven terrain, which poses a safety hazard.

[0057] Therefore, the present embodiment provides a mountain ladder to solve the problem that the traditional herringbone ladder is prone to sliding when used on slopes or uneven ground.

[0058] The embodiments of the present application will be described below with reference to the drawings. Figures 1 to 4 , the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0059] According to the embodiments of the present application, in one aspect, a mountain ladder is provided, which comprises two symmetrical ladder frames 1, a telescopic pointed bolt mechanism, and a movable cross beam 3. Each ladder frame 1 is composed of two ladder legs and a horizontal bar fixed between the two ladder legs, and the heads of the two ladder frames 1 are hinged. A tubular cavity with an open bottom end is arranged inside all the ladder legs, and the telescopic pointed bolt mechanism is arranged in the tubular cavity. The telescopic pointed bolt mechanism comprises a limiting rod 21, a transverse helical gear 22, and a crank transmission mechanism. The limiting rod 21 comprises a threaded driving section, a limiting section, and a tapered ground drilling section from top to bottom. The transverse helical gear 22 is arranged inside the ladder leg, and a threaded hole is arranged in the middle of the transverse helical gear 22. The threaded driving section is engaged with the internal thread of the threaded hole. The crank transmission mechanism comprises a crank 23 and a longitudinal helical gear 24 linked with the crank 23. The longitudinal helical gear 24 is engaged with the transverse helical gear 22 to realize power transmission. The movable cross beam 3 is provided with a plurality of hole positions at both ends. The movable cross beam 3 is detachably connected with the horizontal beam mounting position 101 on the side surface of the ladder leg through a horizontal beam clamping nail and a fixing nut.

[0060] Figure 1 and Figure 2 is a structural schematic diagram of a mountain ladder according to the present embodiment, and Figure 1 and Figure 2 only show the telescopic pointed bolt mechanism on one ladder leg, and the telescopic pointed bolt mechanisms on the remaining three or more ladder legs are omitted. The following content is exemplified by the telescopic pointed bolt mechanism on one ladder leg.

[0061] When the operator shakes the handle 23, the longitudinal bevel gear 24 in the handle transmission mechanism rotates, driving the transverse bevel gear 22 to rotate through the meshing relationship. Since the threaded hole in the middle of the transverse bevel gear 22 is engaged with the threaded driving section of the limiting rod 21, and the transverse bevel gear 22 is rotatably arranged inside the ladder leg, the limiting rod 21 is driven to extend out of the tubular cavity of the ladder leg, so that the conical ground-penetrating section penetrates into the ground. Reverse shaking of the handle 23 can make the limiting rod 21 retract. When adjusting the angle of the ladder stand 1, the hole positions at both ends of the moving crossbeam 3 can be aligned with the crossbeam clamps of different crossbeam mounting positions 101 on the side surface of the ladder leg. By locking with the fixed nuts, the adaptation to different slope terrains is achieved. This working mode makes the mountain ladder effectively enhance the stability in complex terrain through the penetration and fixation of the telescopic pointed bolt mechanism, avoiding sliding or falling. The adjustable connection of the moving crossbeam 3 realizes flexible adaptation to different slopes, expands the application range, and ensures the stability of the ladder stand 1 structure during operation through the locking of the crossbeam clamps and fixed nuts, improving the operation safety. The crossbeam clamps are bolts fixed at the crossbeam mounting positions 101, used for locking with the fixed nuts. The ladder leg can be provided with a cavity for placing the transverse bevel gear 22. The lower section of the transverse bevel gear 22 can be a smooth surface, and a bearing is sleeved on the smooth surface of the lower section to limit the transverse bevel gear 22 inside the cavity.

[0062] In one embodiment, the limiting section is a smooth cylindrical rod, which is circumferentially symmetrically provided with at least one pair of spring plugs 4. The side wall of the ladder leg is axially provided with a plurality of limiting holes 102 corresponding to the positions of the spring plugs 4. When the limiting rod 21 moves downward, the spring plugs 4 pop out and are clamped into the corresponding limiting holes 102.

[0063] When the limiting rod 21 moves downward, the circumferentially symmetrically arranged spring plugs 4 move downward. When the spring plugs 4 align with the limiting holes 102 axially provided on the side wall of the ladder leg, the spring is released under force to push the plug out and clamp it into the corresponding limiting hole 102. During this process, the smooth cylindrical limiting section provides stable support for the spring plug 4. The symmetrically arranged spring plugs 4 enhance the fixing effect through bidirectional clamping. The plurality of limiting holes 102 are distributed along the axis of the ladder leg, which can adapt to different depths of the limiting rod 21 and realize stepwise fixation.

[0064] At the same time, the tubular cavity wall is provided with a vertical limiting long slot. The limiting long slot passes through the limiting hole 102, and the spring plug 4 is slidingly arranged in the limiting long slot. On the one hand, the limiting long slot guides the spring plug 4 to be clamped into the limiting hole 102. On the other hand, the cooperation of the limiting long slot and the spring plug 4 ensures that the limiting rod 21 does not rotate during movement.

[0065] The design is locked mechanically after the limiting rod 21 is inserted into the ground, preventing the limiting rod 21 from retracting due to operation vibration or ground reaction force, and ensuring the stability of the support length of the telescopic spike bolt mechanism. The symmetrical clamping structure makes the ladder legs bear force evenly in complex terrain, avoids support failure caused by single-point loosening, and further improves the anti-overturning ability of the ladder on slopes or uneven ground, providing more reliable safety protection for the operating personnel.

[0066] In one embodiment, the spring plug 4 includes a plunger head, a radial compression spring, and a limiting flange. The plunger head has a hemispherical protrusion at the outer end. The plunger head is slidingly arranged in the plug installation groove on the side of the limiting section. The radial compression spring is in the plug installation groove on the side of the limiting section. The limiting flange is fixed to the plunger head to limit the maximum pop-out displacement of the plunger head. When the limiting rod 21 moves downward, the plug installation groove of the limiting section moves to align with the limiting hole 102, and the radial compression spring pushes the plunger head to pop out and be clamped into the limiting hole 102. The limiting flange is a ring-shaped protrusion fixed to the outer circumferential side of the plunger head, and the outer diameter of the limiting flange is greater than the diameter of the limiting hole 102 of the ladder leg side wall, so that the plunger head cannot fall out of the limiting hole 102 under the action of the limiting flange.

[0067] When the limiting rod 21 moves downward, the plug installation groove on the side of the limiting section moves downward to align with the limiting hole 102 of the ladder leg side wall. At this time, the radial compression spring releases the elastic potential energy and pushes the plunger head to slide outward along the plug installation groove. The hemispherical protrusion at the outer end pops out and is clamped into the limiting hole 102, realizing mechanical locking of the position of the limiting rod 21. When the limiting rod 21 needs to continue to move downward, the spring plug reset tool is used to press the plunger head into the plug installation groove.

[0068] The design realizes automatic clamping and limiting during the downward movement of the limiting rod 21 through the cooperation of the radial compression spring and the plunger head. When the depth of the limiting rod 21 needs to be adjusted, the spring plug reset tool is used to press the plunger head into the plug installation groove, and the downward movement of the limiting rod 21 can be continued.

[0069] In one embodiment, the built-in speed reduction device of the crank handle transmission mechanism converts a smaller force at the crank handle 23 shaking end into a larger force at the gear end of the crank handle 23.

[0070] When the operator shakes the handle 23, the built-in reduction device in the handle transmission mechanism converts the small force applied to the shaking end of the handle 23 into a larger driving force at the gear end of the handle 23 through gear meshing transmission. The reduction device uses a small gear to drive a large gear or multi-stage gear transmission, which reduces the rotation speed while amplifying the torque, so that the operator only needs to apply a small force to drive the threaded driving section of the limiting rod 21 to rotate through the meshing of the longitudinal helical gear 24 and the horizontal helical gear 22, and to realize the stable extension and contraction of the limiting rod 21.

[0071] The reduction device adopts a multi-stage gear transmission structure, and the handle 23 is built into the input space of the reduction device, with its shaking end connected to a small gear, which in turn drives a large gear to rotate through gear meshing. For example, the rotation of the handle 23 first drives the small gear to rotate, the small gear meshes with the intermediate gear (the diameter of the intermediate gear is larger than that of the small gear), and the intermediate gear meshes with the large gear coaxially connected to the longitudinal helical gear 24, forming a three-stage transmission of "small gear→intermediate gear→large gear". Through this transmission mode of driving a small gear with a large gear, the small torque input by the handle 23 is converted into a large torque output by the longitudinal helical gear 24.

[0072] In one embodiment, the tapered drilling section surface is provided with a helical continuous thread.

[0073] In one embodiment, the hole position of the moving cross beam 3 is a polygonal structure matching the cross-sectional shape of the cross beam clamp.

[0074] When the angle of the ladder stand 1 needs to be adjusted, the polygonal hole positions at both ends of the moving cross beam 3 can be aligned with the cross beam clamps on the side of the ladder legs. Since the polygonal hole positions match the cross-sectional shape of the cross beam clamps (such as a hexagonal hole position corresponding to a hexagonal clamp), the two are clamped to form a non-circular mechanical limiting structure. After the operator puts the moving cross beam 3 on the cross beam clamp and locks it with the fixing nut, the polygonal hole positions and the edges of the cross beam clamps are clamped together, preventing the moving cross beam 3 from rotating around the clamp during operation.

[0075] The multi-edge structure of the polygonal shape allows the moving cross beam 3 to be accurately positioned at multiple angle adjustments, and in combination with the multiple cross beam mounting positions 101 distributed along the side of the ladder legs, it can adapt to the terrain requirements of different slopes, ensuring that the ladder remains structurally stable in complex terrain and improving the stability and safety of the work surface.

[0076] In one embodiment, the ladder legs are made of aluminum alloy or carbon fiber material, and the ladder stands 1 are connected by folding hinges to achieve overall folding.

[0077] The ladder legs are made of aluminum alloy or carbon fiber material. Such light and high-strength material can effectively reduce the overall weight of the ladder while ensuring the structural strength of the ladder legs. The two ladder frames 1 are connected by folding hinges. When it is necessary to store or transport the ladder, the operator can push the two ladder frames 1 to rotate around the hinges, so that the ladder frames 1 are folded along the folding hinges. After folding, the volume of the ladder is significantly reduced, which is convenient for storing in the trunk of a vehicle or a narrow space. When it is necessary to use the ladder, the ladder frames 1 are unfolded to the desired angle around the folding hinges, and the angle of the ladder frames 1 is fixed by moving the cross beam 3 and the cross beam clamps.

[0078] In one embodiment, at least two cross beam mounting positions 101 are arranged in the upper part of the ladder leg for fixing the movable cross beam 3 when the angle of the ladder frame 1 is adjusted.

[0079] When it is necessary to adjust the angle of the ladder frame 1 to adapt to different slope terrains, the operator can align the polygonal hole positions at the two ends of the movable cross beam 3 with the cross beam mounting positions 101 at different heights in the upper part of the ladder leg, and then lock them by the fixing nuts. The at least two cross beam mounting positions 101 arranged in the upper part of the ladder leg are distributed along the axial direction, which provides multiple optional fixing positions for the movable cross beam 3.

[0080] In a second aspect, the embodiment also provides a spring plug resetting tool for the mountain carrier, which comprises an operating handle 5, a pressing plate 6, two rotating members 7, two tension rods 8, and two hook-shaped pressing heads 9. The two rotating members 7, the two tension rods 8, and the two hook-shaped pressing heads 9 are symmetrically arranged, and the inner ends of the hook-shaped pressing heads 9 are respectively hinged to the tension rods 8. One end of the rotating member 7 is in abutment with the pressing plate 6, and the other end is hinged to the tension rod 8. When the operating handle 5 is pressed down, the pressing plate 6 is driven, the end of the rotating member 7 is pressed down, the rotating member 7 drives the tension rod 8 to move the hook-shaped pressing heads 9 towards each other.

[0081] In one embodiment, the spring plug resetting tool further comprises a cross beam 10, and the two hook-shaped pressing heads 9 are respectively slidably arranged on the cross beam. The two hook-shaped pressing heads 9 are connected by a first spring. The rotating member 7 is L-shaped, the bottom of the horizontal section of the rotating member 7 is connected to the cross beam 10 by a second spring, and the end of the horizontal section is in abutment with the pressing plate 6. The end of the vertical section of the rotating member 7 is hinged to the tension rod 8.

[0082] As Figure 3When the plunger head needs to be pressed into the plug mounting groove, the spring plug resetting tool is placed on the two ladder legs of the ladder 1, and the shorter end of the two rotating members 7 abuts against the plunger head on the two ladder legs. At this time, the operator presses down the operating handle 5, the operating handle 5 drives the pressing plate 6 to move downward, the rotating member 7 is L-shaped, and the bending part of the rotating member 7 is hinged to the shell 11. During the downward movement of the pressing plate 6, the pressing plate 6 pushes the horizontal section of the rotating member 7 downward, so that the rotating member 7 rotates in the plane with the hinge point as the axis. The vertical section of the rotating member 7 pulls the tension rod 8 to move obliquely upward through the hinged relationship, and further drives the hook-shaped pressing head 9 hinged to the tension rod 8 to move horizontally towards each other. Since the two rotating members 7, the tension rod 8 and the hook-shaped pressing head 9 are symmetrically arranged, the two hook-shaped pressing heads 9 will synchronously extrude the plunger head of the spring plug 4 inward, so that it is retracted into the plug mounting groove against the elastic force of the radial compression spring.

[0083] At the same time, since the first spring and the second spring are compressed in the above process, after the operator releases the operating handle 5, the operator can press down each part of the operating handle 5 to reset.

[0084] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A mountain ladder, characterized in that, include: Two ladder frames (1), each ladder frame (1) consists of two ladder legs and a crossbar fixed between the two ladder legs, and the heads of the two ladder frames (1) are hinged. All of the aforementioned ladder legs have a tubular cavity with an open bottom, and the tubular cavity contains a telescopic pointed bolt mechanism; the telescopic pointed bolt mechanism includes: The limiting rod (21) includes a threaded drive section, a limiting section and a conical drilling section from top to bottom; A transverse helical gear (22) is disposed inside the ladder leg. The transverse helical gear (22) has a threaded through hole in the middle. The threaded drive section meshes with the internal thread of the threaded through hole. The crank transmission mechanism includes a crank (23) and a longitudinal helical gear (24) that is linked to the crank (23). The longitudinal helical gear (24) meshes with the transverse helical gear (22) to achieve power transmission. The mountain ladder also includes a movable crossbeam (3), which has multiple holes at both ends. The movable crossbeam (3) is detachably connected to the crossbeam mounting position (101) on the side of the ladder leg by crossbeam clips and fixing nuts.

2. The mountain ladder according to claim 1, characterized in that: The limiting section is a smooth cylindrical rod, which is symmetrically provided with at least one pair of spring plugs (4) in its circumferential direction; The side wall of the ladder leg is provided with a plurality of limiting holes (102) corresponding to the position of the spring plug (4) along the axial direction. When the limiting rod (21) moves down, the spring plug (4) pops out and gets into the limiting hole (102).

3. The mountain ladder according to claim 2, characterized in that, The spring plug (4) includes: The plunger head has a hemispherical protrusion at its outer end, and the plunger head is slidably disposed in the plug mounting groove on the side of the limiting section; A radial compression spring is located in the plug mounting groove on the side of the limiting section; A limiting flange is fixed to the plunger head to limit the maximum ejection displacement of the plunger head; When the limiting rod (21) moves down, the plug mounting groove of the limiting section moves to align with the limiting hole (102), and the radial compression spring pushes the plunger head to pop out and lock into the limiting hole (102).

4. The mountain ladder according to claim 1, characterized in that, The crank transmission mechanism has a built-in speed reduction device.

5. The mountain ladder according to claim 1, characterized in that, The surface of the conical drilling section is provided with a continuous spiral thread.

6. The mountain ladder according to claim 1, characterized in that, The holes of the movable crossbeam (3) are polygonal in shape, matching the cross-sectional shape of the crossbeam clips.

7. The mountain ladder according to claim 1, characterized in that, The ladder legs are made of aluminum alloy or carbon fiber, and the ladder frames (1) are connected by folding hinges to achieve overall folding.

8. The mountain ladder according to any one of claims 1-7, characterized in that, The upper part of the ladder leg is provided with at least two crossbeam mounting positions (101).

9. A spring plug reset tool for the mountain ladder of claim 3, characterized in that, It includes an operating handle (5), a pressure plate (6), two rotating components (7), two tension rods (8), and two hook-shaped pressure heads (9); Among them, two rotating components (7), two tension rods (8) and two hook-shaped pressure heads (9) are symmetrically arranged, and the inner ends of the hook-shaped pressure heads (9) are respectively hinged to the tension rods (8); The rotating component (7) has one end abutting against the pressure plate (6) and the other end hinged to the tension rod (8); When the operating handle (5) is pressed down, it drives the pressure plate (6), and the pressure plate (6) presses down on the end of the rotating component (7). The rotating component (7) drives the tension rod (8) to move the hook-shaped pressure head (9) towards each other.

10. The spring plug reset tool according to claim 9, characterized in that, It also includes a crossbeam (10), and the two hook-shaped pressure heads (9) are slidably disposed on the crossbeam (10), and the two hook-shaped pressure heads (9) are connected by a first spring; The rotating component (7) is L-shaped, with its horizontal section bottom connected to the crossbeam (10) via a second spring, and its horizontal section end abutting against the pressure plate (6); its vertical section end is hinged to the tension rod (8).

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