Slipping type escape ladder, using method thereof and engineering machinery

Abstract

The invention discloses a sliding type escape ladder, a using method thereof and engineering machinery. The sliding type escape ladder comprises a fixed ladder, a slide, an operating rod and a blocking component, the fixed ladder is mounted around the cab; the slide is mounted on the fixed ladder and can slide up and down in the fixed ladder; the operating rod is configured to lock and unlock the fixed ladder and the slide; the operating rod comprises a first connecting piece and a second connecting piece. The first connecting piece is divided into a first fixing part, a second fixing part and a third fixing part. And the blocking component is configured to limit and release the limit of the third fixing component, and when the third fixing component is limited, the rotation of the operating rod is blocked, so that the second fixing component and the butt joint component are always in a locking state. According to the sliding type escape ladder provided by the invention, the sliding ladder is locked by utilizing the self weight of the ladder, and the locking function is safe and reliable; during emergency escape, the escape ladder can be unlocked and put down only through one-step operation, and the escape time is greatly shortened.

Description

Technical Field

[0001] The invention relates to a sliding escape ladder and belongs to the field of engineering machinery. Background Art

[0002] For super-large hydraulic shovels of 200 tons and above, the cab is higher above the ground. In addition to the main passage, a second passage must be provided around the cab, or an emergency escape device must be installed.

[0003] When using the second-access solution, inclined ladders are typically added to both the front of the lower compartment in the cab and the undercarriage. Access is only possible when the two ladders are aligned. If the upper and lower ladders are misaligned, the flexible ladder at the bottom of the upper ladder must be removed and manually deployed and lowered for escape. While this technical solution is simple and reliable, deploying the flexible ladder significantly wastes escape time.

[0004] When deploying an emergency escape system, one of four options is generally used: a rope escape system, a bag escape system, a flip escape ladder, or a slide-down escape ladder. Rope and bag escape systems require more steps and time to operate, while flip escape ladders require a larger space to rotate and lose their emergency escape function when there are obstacles around them. Slide-down escape ladders are not restricted by space, but their locking and unlocking mechanisms must be simple and reliable, minimizing the number of steps required to unlock and lower the ladder. Summary of the Invention

[0005] In response to the above-mentioned problems, the present invention proposes a sliding escape ladder and a method for using the same. When the ladder is in a locked state, the ladder can be locked by relying on its own weight. When emergency escape is required, the ladder can be quickly unlocked and lowered by simply pulling out the locking pin.

[0006] The present invention is achieved by the following technical solutions:

[0007] In the first aspect, the present invention provides a sliding escape ladder, comprising a fixed ladder, a slide, a joystick and a blocking component; the fixed ladder is installed around the cab; the slide is installed on the fixed ladder and can slide up and down in the fixed ladder; the joystick is configured to lock and unlock the fixed ladder and the slide; the joystick comprises a first connecting member and a second connecting member, and the first connecting member is rotated by holding the second connecting member; the first connecting member is divided into three fixed components, namely the first fixed component, the second fixed component and the third fixed component; the middle area of the first fixed component is hingedly connected to the fixed ladder to form a rotating pair; the second fixed component The component is installed in the lower area of the first fixing component and is used in conjunction with the docking component on the slide. The docking component and the second fixing component are locked and unlocked by rotating the first fixing component forward or reversely. The third fixing component is installed in the upper area of the first fixing component. When the second fixing component and the docking component are in a locked state, the third fixing component is close to or fits the fixed ladder. The blocking component is constructed to limit and unlock the third fixing component. When the third fixing component is limited, the rotation of the operating lever is blocked, so that the second fixing component and the docking component are always in a locked state.

[0008] In some embodiments, the top of the slide frame is provided with a hanging slot opening toward the fixed ladder, which constitutes the docking component; the second fixed component is a locking shaft, and the operating lever is rotated so that the locking shaft is stuck in the hanging slot to prevent the slide from sliding up and down.

[0009] In some embodiments, the third fixed component is a limit plate, and the blocking component is a locking pin; the frame of the fixed ladder is fixed with a pin hole seat at a position above the limit plate, and a locking pin is inserted into the pin hole seat. The limit plate is restricted between the frame of the fixed ladder and the locking pin, thereby blocking the rotation of the operating lever; the slide causes the operating lever to rotate due to its own gravity, thereby causing the limit plate to press on the locking pin to form a friction pair.

[0010] In some embodiments, the pin hole seat is composed of pin hole plates with upper and lower spacing and coaxial insertion holes; and / or, the locking pin is composed of an insertion rod and a handle.

[0011] In some embodiments, the first fixing component is a base plate with an obtuse arc, and a hinged hole is opened at the corner of the base plate for installation on the hinge axis of the fixed ladder; when the base plate is rotated to the position for locking the slide, the base plate above the hinged hole roughly coincides with the frame of the fixed ladder.

[0012] In some embodiments, the second connecting member is an L-shaped handle, which is fixed to the base plate at a position above the reaming hole. Pushing and pulling the handle drives the base plate to rotate, thereby locking or unlocking the second fixing member and the docking member.

[0013] In some embodiments, symmetrically arranged slide seats are provided on both sides of the frame of the fixed ladder along its length direction, and the groove openings on the slide seats face the slide. The slide is installed in the slide seats on both sides to enable the slide to slide up and down in the fixed ladder; and / or, the top of the fixed ladder has a ladder cage structure.

[0014] In a second aspect, the present invention provides a method for using the above-mentioned sliding escape ladder:

[0015] Escape ladder locking:

[0016] 1) Push the joystick outwards so that the locking shaft on the joystick contacts the frame of the fixed ladder;

[0017] 2) Install the slide into the slide seat of the fixed ladder, and slide the slide so that the hanging slot and the locking shaft are at the same height;

[0018] 3) Hold the handle on the joystick and pull the joystick inward so that the locking shaft is engaged with the hanging slot and the limit plate on the joystick contacts the frame of the fixed ladder;

[0019] 4) Insert the locking pin and release the lever to complete the escape ladder locking operation.

[0020] Unlock and lower the escape ladder:

[0021] Simply pull out the locking pin to unlock the escape ladder and allow it to descend.

[0022] In some embodiments, when pulling out the locking pin, if the friction between the locking pin and the limiting plate is large and pulling out the locking pin is difficult, the locking pin can be pulled out while pulling the operating lever inward, and then the operating lever can be released to unlock and lower the slide.

[0023] In a third aspect, the present invention provides an engineering machine comprising the above-mentioned sliding escape ladder.

[0024] Beneficial effects of the present invention:

[0025] The present invention provides a sliding escape ladder, which utilizes the ladder's own weight to lock the slide, and the locking function is safe and reliable; when escaping in an emergency, the escape ladder can be unlocked and lowered in just one step, which greatly shortens the escape time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, as part of this disclosure, are intended to provide a further understanding of the disclosure. The exemplary embodiments of the disclosure and their descriptions are intended to explain the disclosure and do not constitute undue limitations thereon. Obviously, the drawings described below are merely examples, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0027] In the attached figure:

[0028] Figure 1 This is a schematic diagram of the sliding escape ladder of the present invention;

[0029] Figure 2 This is a schematic diagram of the locked state of the slide of the present invention;

[0030] Figure 3 This is a schematic diagram of the slide in the unlocked state of the present invention;

[0031] Figure 4 It is a schematic diagram of the fixed ladder structure of the present invention;

[0032] Figure 5 It is a schematic diagram of the slide structure of the present invention;

[0033] Figure 6 Schematic diagram of the joystick structure of the present invention.

[0034] In the figure: 1, fixed ladder, 2, slide, 3, joystick, 4, locking pin, 101, frame, 102, hinge axis, 103, pin hole plate, 104, slide seat, 105, ladder cage, 106, mounting seat, 201, hanging slot, 301, base plate, 302, locking axis, 303, limit plate, 304, handle.

[0035] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0039] like Figure 1 As shown, the present invention provides a sliding escape ladder, comprising a fixed ladder 1, a slide 2, a joystick 3 and a blocking component (i.e., a locking latch 4 in the figure); the fixed ladder 1 is installed around the cab; the slide 2 is installed on the fixed ladder 1 and can slide up and down in the fixed ladder 1; the joystick 3 is configured to lock and unlock the fixed ladder 1 and the slide 2; the joystick 3 comprises a first connecting member and a second connecting member, and the first connecting member is rotated by holding the second connecting member; the first connecting member is divided into three fixing members, namely, a first fixing member, a second fixing member and a third fixing member; the middle area of the first fixing member is connected to the fixed ladder 1 to form Rotational pair; the second fixing component is installed in the lower area of the first fixing component, and is used in conjunction with the docking component on the slide 2. By rotating the first fixing component forward or reversely, the docking component and the second fixing component can be locked and unlocked; the third fixing component is installed in the upper area of the first fixing component. When the second fixing component and the docking component are in a locked state, the third fixing component is close to or fits the fixed ladder 1; the blocking component is constructed to limit and unlock the third fixing component. When the third fixing component is limited, the rotation of the operating lever 3 is blocked, so that the second fixing component and the docking component are always in a locked state.

[0040] The specific structure of the above-mentioned fixed ladder is further described below.

[0041] like Figure 4As shown, the fixed ladder 1 includes a frame 101, a hinge shaft 102, a pin hole plate 103, a slide seat 104, a ladder cage 105, and a mounting seat 106. The fixed ladder 1 is fixed to the periphery of the cab via the mounting seat 106. A pin hole plate 103 is provided at the top of the frame 101 for inserting the locking pin 4. A hinge shaft 102 is provided on the top side of the frame 101 for mounting a joystick 3, which can rotate around the hinge shaft 2. Slide seats 104 are provided on both sides of the frame 101 for mounting the slide 2, allowing the slide 2 to slide freely up and down within the slide seats 104. A ladder cage 105 is provided at the top of the frame 101 to provide safety protection during escape.

[0042] The specific structure of the above-mentioned slide is further described below.

[0043] like Figure 5 As shown, a hanging notch 201 is provided on the top of the slide 2 for locking the slide 2 in a locked position to prevent the slide 2 from falling due to its own weight.

[0044] The specific structure of the above-mentioned joystick is further described below.

[0045] like Figure 6 As shown, the joystick 3 is composed of a base plate 301, a locking shaft 302, a limiting plate 303, and a handle 304. The first fixing component is the base plate 301, the second fixing component is the locking shaft 302, the third fixing component is the limiting plate 303, and the second connecting component is the handle 304.

[0046] The base plate 301 is provided with a mounting hole for mounting on the hinge axis 102. A locking shaft 302 is provided at the bottom of the base plate 301, which engages with the hanging slot 201. When the slide 2 is in the locked position, it prevents the slide 2 from sliding up or down. A limit plate 303 is provided at the top of the base plate 301. When the slide 2 is in the locked position, the limit plate 303 is located in the gap between the frame 101 and the locking latch 4, limiting the rotation of the joystick 4 about the hinge axis 102. A handle 304 is provided at the top of the base plate 301. The locking shaft 302 can be inserted into or removed from the hanging slot 201 by pushing or pulling the handle 304.

[0047] Further solutions, such as Figure 2 As shown, the locking pin 4 is inserted into the pin hole plate 103 and prevents itself from coming out by its own weight. When the slide 2 is in the locked position, the lower part of the locking pin 4 can prevent the limit plate 303 from moving. The top of the locking pin 4 can be grasped by hand and pulled upward to be pulled out of the pin hole plate 103.

[0048] It should be noted that the locking shaft 302 is fixed to the base plate 301 and can slide into the hanging slot 201 of the slide 2 to limit the slide 2 in the vertical direction. A limit plate 303 is fixed to the upper portion of the base plate 301. When the slide 2 is in the locked position, the limit plate 303 is stuck between the locking pin 4 and the fixed ladder 1, preventing the joystick 3 from rotating about the hinge axis. The handle 304 is fixed to the upper portion of the base plate 301 and is used to operate the joystick 3. When pulled inward to the bottom, the limit plate 303 and the locking pin 4 are disengaged, reducing the frictional resistance when the locking pin 4 is removed. After the locking pin 4 is removed, when the joystick 3 is pushed forward to the bottom, the locking shaft 302 and the hanging slot 201 are disengaged, and the locking shaft 302 contacts the frame 101 of the fixed ladder 1, allowing the slide 2 to slide up and down within the left chute 104 of the fixed ladder 1.

[0049] Sliding escape ladder locking principle:

[0050] like Figure 2 As shown, when the escape ladder is in the locked position, the slide 2, under its own weight, presses the locking notch 201 downward onto the locking shaft 302. This downward force causes the operating lever 3 to rotate about the hinge axis 102. At this point, the locking pin 4, under its own weight, is inserted into the pinhole plate 103. Meanwhile, the stop plate 303 is positioned between the frame 101 and the locking pin 4. The rotation of the operating lever 3 is blocked by the locking pin 4, preventing the locking shaft 302 from sliding out of the locking notch 201, thereby locking the sliding escape ladder. Furthermore, the friction force exerted by the stop plate 303 on the locking pin 4 prevents it from moving upward and falling off.

[0051] Unlocking principle of sliding escape ladder:

[0052] like Figure 3 As shown, when the locking pin 4 is removed, the force from the locking notch 201 exerts downward pressure on the locking shaft 302, causing the operating lever 3 to rotate about the hinge axis 102, ultimately causing the locking shaft 302 to slide out of the locking notch 201. Simultaneously, the locking shaft 302 is blocked by the frame 101, limiting the rotation of the operating lever 3 to a limited angle. Once the locking shaft 302 has slid out of the locking notch 201, the slide 2, due to its own weight, slides downward within the chute 104, thereby unlocking and lowering the escape ladder.

[0053] The use process of the entire invention is as follows:

[0054] Locking of the escape ladder:

[0055] First, push the operating lever 4 outward so that the locking shaft 302 contacts the frame 101;

[0056] Then, move the slide 2 in the slide groove 104 so that the hanging groove 201 and the locking shaft 302 are at the same position;

[0057] Again, hold the handle 304 and pull the operating lever 104 inward, so that the locking shaft 302 slides into the hanging slot 201 and the limiting plate 303 contacts the frame 101;

[0058] Finally, the locking pin 4 is inserted and the operating lever 3 is released to complete the locking operation of the slide.

[0059] Unlocking the escape ladder:

[0060] Simply pulling out the locking pin 4 can unlock and lower the slide 2 .

[0061] When the friction force is too great and the slide 2 is pulled out with great effort, the operating lever 3 can be pulled inwards while the locking latch 4 is pulled out, and then the operating lever 3 is released to realize the unlocking and descending function of the slide 2.

[0062] In summary, the present invention provides a sliding escape ladder and a method for using the same, which achieve the following functions and effects:

[0063] 1) The slide is locked using the ladder's own weight, and the locking function is safe and reliable.

[0064] When the escape ladder is in the locked position, the slide relies on its own gravity to press down on the locking shaft of the operating lever. The component force causes the operating lever to rotate around the hinge axis, and then the limit plate on the operating lever presses on the locking pin, thereby preventing the locking shaft from sliding out of the hanging slot and completing the locking of the escape ladder. At the same time, the friction force of the limit plate pressing on the locking pin can prevent the locking pin from moving up and falling off.

[0065] 2) In case of emergency escape, the escape ladder can be unlocked and lowered in just one step, greatly shortening the escape time.

[0066] To unlock, simply pull out the locking pin. The weight of the slide acts on the locking shaft, causing the lever to rotate around the hinge axis, and the locking shaft disengages from the hanging slot, unlocking the slide and allowing it to automatically drop.

[0067] The engineering machinery provided by the present invention is described below. The engineering machinery described below and the sliding escape ladder described above can be referred to in correspondence with each other.

[0068] The present invention provides an engineering machine, which may include the sliding escape ladder as described in any one of the above embodiments.

[0069] The beneficial effects achieved by the engineering machinery provided by the present invention are consistent with the beneficial effects achieved by the sliding escape ladder provided by the present invention, and will not be described in detail here.

[0070] It should be noted that the above-mentioned engineering machinery may be an extra-large hydraulic shovel.

[0071] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0072] Furthermore, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are also intended to fall within the scope of protection of the present invention and form different embodiments. For example, in the above embodiments, those skilled in the art will be able to use them in combination based on the known technical solutions and the technical problems to be solved by this application.

[0073] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the present invention can make some changes or modifications to equivalent embodiments using the above-mentioned technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A sliding escape ladder, characterized in that: include: Fixed ladder, installed around the cab; a slide, mounted on the fixed ladder, capable of sliding up and down in the fixed ladder; The operating lever is configured to lock and unlock the fixed ladder and the slide; the operating lever includes a first connecting member and a second connecting member, and the first connecting member is rotated by holding the second connecting member; the first connecting member is divided into three fixed parts, namely: a first fixed component, wherein a central region thereof is connected to the fixed ladder to form a rotation pair; a second fixing member, mounted in a lower region of the first fixing member, for use in conjunction with a docking member on the slide, wherein the docking member and the second fixing member are locked or unlocked by rotating the first fixing member forward or reversely; a third fixing member, mounted on an upper region of the first fixing member, wherein when the second fixing member and the docking member are in a locked state, the third fixing member is close to or in contact with the fixed ladder; The blocking component is configured to limit and release the third fixing component. When the third fixing component is limited, the rotation of the operating lever is blocked, thereby keeping the second fixing component and the docking component in a locked state at all times.

2. The sliding escape ladder according to claim 1, characterized in that: The top of the frame of the slide is provided with a hanging slot opening toward the fixed ladder, and the hanging slot constitutes the docking component; The second fixing component is a locking shaft. The operating lever is rotated to make the locking shaft engage in the hanging slot to prevent the slide from sliding up and down.

3. The sliding escape ladder according to claim 1, characterized in that: The third fixing component is a limit plate, and the blocking component is a locking pin; The frame of the fixed ladder is fixed with a pin hole seat at a position above the limit plate, and a locking pin is inserted into the pin hole seat. The limit plate is restricted between the frame of the fixed ladder and the locking pin, thereby preventing the rotation of the operating rod; the slide causes the operating rod to rotate due to its own gravity, thereby causing the limit plate to press on the locking pin to form a friction pair.

4. The sliding escape ladder according to claim 3, characterized in that: The pin hole seat is composed of pin hole plates with spaced apart upper and lower portions and coaxial pin holes; and / or, The locking latch consists of an inserting rod and a handle.

5. The sliding escape ladder according to claim 1, characterized in that: The first fixing component is a base plate with an obtuse arc, and a hinged hole is opened at the corner of the base plate for installation on the hinge axis of the fixed ladder; when the base plate is rotated to the position for locking the slide, the base plate above the hinged hole roughly coincides with the frame of the fixed ladder.

6. The sliding escape ladder according to claim 5, characterized in that: The second connecting member is an L-shaped handle, which is fixed to the base plate at a position above the reaming hole. Pushing and pulling the handle drives the base plate to rotate, thereby locking or unlocking the second fixing member and the docking member.

7. The sliding escape ladder according to claim 1, characterized in that: The fixed ladder frame is provided with symmetrically arranged sliding groove seats at intervals along its length on both sides, the groove openings on the sliding groove seats face the slide, and the slide is installed in the sliding groove seats on both sides to enable the slide to slide up and down in the fixed ladder; and / or, The top of the fixed ladder is provided with a ladder cage structure.

8. A method for using the sliding escape ladder according to any one of claims 1 to 7, characterized in that: Escape ladder locking: 1) Push the joystick outwards so that the locking shaft on the joystick contacts the frame of the fixed ladder; 2) Install the slide into the slide seat of the fixed ladder, and slide the slide so that the hanging slot and the locking shaft are at the same height; 3) Hold the handle on the joystick and pull the joystick inward so that the locking shaft is engaged with the hanging slot and the limit plate on the joystick contacts the frame of the fixed ladder; 4) Insert the locking pin and release the lever to complete the escape ladder locking operation. Unlock and lower the escape ladder: Simply pull out the locking pin to unlock the escape ladder and allow it to descend.

9. The method of use according to claim 8, characterized in that: When pulling out the locking pin, if the friction between the locking pin and the limiting plate is large and the pulling out is difficult, the locking pin is pulled out while pulling the operating lever inward, and then the operating lever is released to realize the unlocking and falling function of the slide.

10. An engineering machine, characterized in that: The invention comprises the sliding escape ladder according to any one of claims 1 to 7.

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