Ladder

Abstract

The utility model provides a ladder which comprises a plurality of supporting ladders, any two adjacent supporting ladders are hinged through two side-by-side hinge assemblies, and the plurality of supporting ladders can be folded at the hinge positions; the device further comprises a locking assembly. The locking assembly comprises a reset spring pin used for locking one hinge assembly and a self-locking reset spring pin used for locking the other hinge assembly. According to the technical scheme, locking and unlocking of the two supporting ladders are achieved through cooperation of the reset spring pins and the self-locking reset spring pins, and therefore unfolding and folding of the ladders can be achieved through operation of one worker.

Description

Technical Field

[0001] This application relates to the field of wind power technology, and more particularly to a ladder. Background Technology

[0002] Folding ladders are used inside wind turbine nacelles. The nacelle entrance has limited space, making it impossible to carry a standard ladder inside. Different nacelles have different internal dimensions, so folding ladders need to be designed to fit different turbine models, making them easy to carry and install. Utility Model Content

[0003] This application provides a ladder to facilitate operation by staff.

[0004] This application provides a ladder comprising: a plurality of supporting ladders, wherein any two adjacent supporting ladders are hinged together by two side-by-side hinge components, and the plurality of supporting ladders can be folded at the hinge position;

[0005] It also includes a locking assembly; the locking assembly includes a return spring pin for locking one of the hinge components and a self-locking return spring pin for locking the other hinge component.

[0006] In the above technical solution, the locking and unlocking of the two support ladders are achieved by using a combination of a return spring pin and a self-locking return spring pin, so that the ladders can be unfolded and folded by one operator.

[0007] In one specific implementation, the hinge assembly includes a first joint plate fixedly connected to a support ladder therein, and a second joint plate fixedly connected to another support ladder, the first joint plate being hinged to the second joint plate;

[0008] The reset spring pin is disposed in the first joint plate of the corresponding hinge assembly, and the second joint plate of the hinge assembly is provided with a plurality of first locking holes that cooperate with the reset spring pin; the plurality of first locking holes rotate around the axis around which the corresponding second joint plate rotates.

[0009] The self-locking return spring pin is disposed on the first joint plate in the corresponding hinge assembly, and the second joint plate in the hinge assembly is provided with a second locking hole that cooperates with the self-locking return spring pin; a plurality of the second locking holes rotate around the axis around which the corresponding second joint plate rotates.

[0010] In one specific implementation, among the plurality of supporting ladders, the middle supporting ladder is a cross ladder, and the number of supporting ladders on both sides of the cross ladder is the same.

[0011] In one specific implementation scheme, among the plurality of support ladders, the support ladders located at both ends are a first telescopic ladder that extends and retracts at one end.

[0012] In one specific implementation, the first telescopic ladder includes a first sub-ladder and a second sub-ladder nested within the first sub-ladder and slidable relative to the first sub-ladder; wherein...

[0013] The second sub-ladder is provided with a plurality of third locking holes, which are arranged at intervals along the length of the second sub-ladder;

[0014] It also includes a first locking pin, which passes through the first ladder and can be inserted into the third locking hole.

[0015] In one specific implementation, the cross bracing ladder is a second telescopic ladder that extends and retracts at both ends.

[0016] In one specific implementation, the second telescopic ladder includes a third sub-ladder and a fourth and a fifth sub-ladder nested within the third sub-ladder, wherein the fourth and fifth sub-ladders are slidably connected to the third sub-ladder;

[0017] The fourth sub-ladder is provided with a plurality of fourth locking holes, which are arranged at intervals along the length of the fourth sub-ladder;

[0018] The fifth sub-ladder is provided with a plurality of fifth locking holes, which are arranged at intervals along the length of the fifth sub-ladder;

[0019] It also includes a second locking pin and a third locking pin; the second locking pin passes through the third sub-ladder and can be inserted into the fourth locking hole; the third locking pin passes through the third sub-ladder and can be inserted into the fifth locking hole.

[0020] In one specific implementation, the third ladder is provided with a footboard.

[0021] In one specific implementation, the number of supporting ladders is five. Attached Figure Description

[0022] Figure 1 A schematic diagram of the ladder provided in the embodiments of this application;

[0023] Figure 2 This is an exploded view of an embodiment of this application. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0025] It should be noted that, unless otherwise defined, the technical or scientific terms used in one or more embodiments of this specification should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar words used in one or more embodiments of this specification do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] To facilitate understanding of the ladder provided in this application embodiment, its application scenario is first described. The ladder provided in this application embodiment is used inside a wind turbine tower. Current ladders also employ folding mechanisms, but they cannot be folded and unfolded by a single person. Therefore, this application embodiment provides a ladder to facilitate single-person operation. A detailed description follows with reference to specific accompanying drawings and embodiments.

[0027] refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of the ladder provided in an embodiment of this application is shown. Figure 2 An exploded view of the ladder provided in this embodiment is shown. The ladder provided in this embodiment includes multiple support ladders 10, which are hinged together and can be folded at the hinged positions. Specifically, when carrying the ladder, the multiple support ladders 10 can be folded to reduce the space occupied by the ladder. When using the ladder, the multiple support ladders 10 can be unfolded to form a stable support.

[0028] It should be understood that in the embodiments of this application, the ladder may include multiple supporting ladders 10, such as two, three, four, or other different numbers of supporting ladders 10. Figure 1 The example illustrates five supporting ladders 10. For ease of description, the five supporting ladders 10 are named according to their location. For instance, the five supporting ladders 10 are divided into diagonal support ladders and horizontal support ladders. The middle supporting ladder 10 is a horizontal support ladder, while the two supporting ladders 10 on either side of the horizontal support ladder are diagonal support ladders, and the two supporting ladders 10 on the other side of the horizontal support ladder are also diagonal support ladders. In use, the five supporting ladders 10 form a trapezoidal ladder. When not in use, the supporting ladders 10 are folded, with the specific folding direction as shown below. Figure 1The direction indicated by the arrowed curve shown in the image.

[0029] When multiple support ladders 10 are hinged, they are hinged by two side-by-side hinge components 20. The two hinge components 20 are respectively fixedly connected to the vertical rods of the support ladders 10, and the hinge between the support ladders 10 is achieved by the rotation of the hinge components 20 themselves.

[0030] To lock the support ladder 10 together and ensure its stability when unfolded or folded, a locking assembly 30 is used for locking. This locking assembly 30 includes a self-locking return spring pin 31 and a return spring pin 32. Specifically, one hinge assembly 20 is locked by the return spring pin 32, while the other hinge assembly 20 is locked by the self-locking return spring pin 31. The return spring pin 32 is a component that pulls up when unlocking and automatically returns to its locked position when released. The self-locking return spring pin 31 is a spring pin that can be locked when the spring pin is pulled up.

[0031] The corresponding hinge assembly 20 is unlocked, and the self-locking return spring pin 31 is locked to keep it in the unlocked state. Then, the return spring pin 32 is pulled up to unlock the other hinge assembly 20. The support ladder 10 is rotated, and when the support ladder 10 is rotated into position, the return spring pin 32 is released to lock the corresponding hinge assembly 20. Then, the self-locking return spring pin 31 is released to lock the other hinge assembly 20 as well, thus completing the locking of the support ladder 10 and keeping the adjacent support ladders 10 relatively stable.

[0032] As can be seen from the above description, in the ladder provided in this application embodiment, the locking and unlocking of the two support ladders 10 are achieved by using the cooperation of the return spring pin 32 and the self-locking return spring pin 31, so that the ladder can be operated by one worker to realize the unfolding and folding of the ladder.

[0033] In one specific implementation, the hinge assembly 20 includes two articulated plates, which are referred to as the first articulated plate 21 and the second articulated plate 22 for ease of description. The first articulated plate 21 is fixedly connected to one of the supporting ladders 10, and the second articulated plate 22 is fixedly connected to the other supporting ladder 10. The first articulated plate 21 is hinged to the articulated plate. That is, in this embodiment, the two adjacent supporting ladders 10 are hinged together by the hinge between the first articulated plate 21 and the second articulated plate 22. When the two supporting ladders 10 rotate, they can rotate about the axis of hinge between the first articulated plate 21 and the second articulated plate 22.

[0034] Taking two of the support ladders 10 as examples, in their corresponding locking assemblies 30, a return spring pin 32 is disposed in the first joint plate 21 of the corresponding hinge assembly 20. The second joint plate 22 of the hinge assembly 20 is provided with multiple first locking holes that cooperate with the return spring pin 32. The multiple first locking holes can cooperate with the return spring pin 32 to lock the first joint plate 21 and the second joint plate 22. In a specific configuration, the multiple first locking holes are arranged around the axis around which the corresponding second joint plate 22 rotates.

[0035] For example, when the two support ladders 10 need to rotate relative to each other, the return spring pin 32 is pulled up, the support ladder 10 is rotated, and the first joint plate 21 and the second joint plate 22 rotate relative to each other. When the support ladder 10 is rotated into position, the return spring pin 32 is released, and the return spring pin 32 can be inserted into the first locking hole at that position, thereby locking the first joint plate 21 and the second joint plate 22. Of course, when the support ladder 10 is rotated to other desired positions, the return spring pin 32 can also be inserted into the first locking hole corresponding to that position to lock the two support ladders 10.

[0036] Similarly, the self-locking return spring pin 31 in the locking assembly 30 is disposed on the first joint plate 21 in the corresponding hinge assembly 20, and the second joint plate 22 in the hinge assembly 20 is provided with a second locking hole that mates with the self-locking return spring pin 31. The plurality of second locking holes rotate around the axis around which the corresponding second joint plate 22 rotates. The mating method between the self-locking return spring pin 31 and the second locking hole is the same as the mating method between the return spring pin 32 and the first locking hole, and will not be described in detail here.

[0037] Continue to refer to Figure 1 As shown, with Figure 1 Taking the trapezoidal ladder shown as an example, among the multiple supporting ladders 10, the middle supporting ladder 10 is a horizontal support ladder, and the supporting ladders 10 on both sides of the horizontal support ladder are diagonal support ladders, and the number of supporting ladders 10 on both sides of the horizontal support ladder is the same. Figure 1 As shown, taking five supporting ladders 10 as an example, two supporting ladders 10 are set on each side of the horizontal support ladder. When the ladder is unfolded, it forms a trapezoidal ladder, and the diagonal support ladders on both sides support and stabilize the middle horizontal support ladder. Workers can operate directly on the horizontal support ladder, and can climb up the horizontal support ladder via the diagonal support ladder, or climb down the horizontal support ladder.

[0038] In one alternative configuration, among the multiple support ladders 10, the support ladders 10 located at both ends are first telescopic ladders 11 that extend and retract at one end. That is, the two support ladders 10 located at the ends of the multiple support ladders 10 are telescopic ladders. When using telescopic ladders, the length of the telescopic ladder can be adjusted as needed, thereby adjusting the height of the cross ladder. It should be understood that when adjusting the first telescopic ladder 11, both first telescopic ladders 11 are adjusted synchronously to ensure that the cross ladder remains horizontal or nearly horizontal after adjustment.

[0039] In one feasible embodiment, the first telescopic ladder 11 is telescopic at one end and fixed at the other. For example, the first telescopic ladder 11 includes a first sub-ladder 111 and a second sub-ladder 112. The second sub-ladder 112 is nested within the first sub-ladder 111, and the second sub-ladder 112 is slidable relative to the first sub-ladder 111 to adjust the length of the first telescopic ladder 11.

[0040] In a specific configuration, the second ladder 112 is provided with multiple third locking holes 114, which are spaced apart along the length of the second ladder 112. When locked, the ladder also includes a first locking pin 113, which passes through the first ladder 111 and can be inserted into the third locking holes 114. For example, after adjusting the length of the first telescopic ladder 11, the first locking pin 113 is inserted into the first ladder 111 and then into the third locking hole 114 of the second ladder 112, thereby locking the first ladder 111 and the second ladder 112.

[0041] By using the aforementioned end support ladder 10 as a telescopic ladder, the height of the cross brace ladder can be adjusted to meet different height requirements.

[0042] In an alternative embodiment, the crossbeam ladder is also a telescopic ladder, allowing the support width of the crossbeam ladder to be adjusted by changing its length. For example, the crossbeam ladder is a second telescopic ladder 12 that extends from both ends. In use, the two ends of the second telescopic ladder 12 are connected to two support ladders 10 respectively. When the support width of the crossbeam ladder needs to be adjusted, both ends of the crossbeam ladder are pulled to lengthen it, thereby increasing the width of the crossbeam ladder.

[0043] For example, the second telescopic ladder 12 includes a third sub-ladder 121 and a fourth sub-ladder 122 and a fifth sub-ladder 123 nested within the third sub-ladder 121. The fourth sub-ladder 122 and the fifth sub-ladder 123 are slidably connected to the third sub-ladder 121. The fourth sub-ladder 122 has a plurality of fourth locking holes 126, spaced apart along its length. The fifth sub-ladder 123 has a plurality of fifth locking holes 125, also spaced apart along its length. Correspondingly, the ladder also includes a second locking pin 127 and a third locking pin 124. The second locking pin 127 passes through the third sub-ladder 121 and can be inserted into the fourth locking hole 126; the third locking pin 124 passes through the third sub-ladder 121 and can be inserted into the fifth locking hole 125. The engagement method of the third locking pin 124 and the second locking pin 127 with the corresponding locking holes is the same as the engagement method of the first locking pin 113 with the second locking hole, and will not be described in detail here.

[0044] In one specific implementation, the third sub-ladder 121 comprises two fixed ladder sections joined together, one of which slides into the fourth sub-ladder 122 and the other slides into the fifth sub-ladder 123.

[0045] As an example, the third sub-ladder 121 is equipped with a step 40, that is, a step 40 is installed on a fixed part of the cross brace ladder, and workers can directly step on the step 40 to work.

[0046] One or more embodiments of this specification are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments of this specification should be included within the scope of protection of this disclosure.

[0047] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A ladder, characterized in that, include: Multiple support ladders, with any two adjacent support ladders hinged together by two side-by-side hinge components, and the multiple support ladders can be folded at the hinge position; It also includes a locking assembly; the locking assembly includes a return spring pin for locking one of the hinge components and a self-locking return spring pin for locking the other hinge component.

2. The ladder according to claim 1, characterized in that, The hinge assembly includes a first joint plate fixedly connected to a support ladder therein, and a second joint plate fixedly connected to another support ladder, wherein the first joint plate and the second joint plate are hinged. The reset spring pin is disposed in the first joint plate of the corresponding hinge assembly, and the second joint plate of the hinge assembly is provided with a plurality of first locking holes that cooperate with the reset spring pin; the plurality of first locking holes rotate around the axis around which the corresponding second joint plate rotates. The self-locking return spring pin is disposed on the first joint plate in the corresponding hinge assembly, and the second joint plate in the hinge assembly is provided with a second locking hole that cooperates with the self-locking return spring pin; a plurality of the second locking holes rotate around the axis around which the corresponding second joint plate rotates.

3. The ladder according to claim 1 or 2, characterized in that, Among the multiple supporting ladders, the middle supporting ladder is a horizontal support ladder, and the number of supporting ladders on both sides of the horizontal support ladder is the same.

4. The ladder according to claim 3, characterized in that, Among the multiple support ladders, the support ladders located at both ends are the first telescopic ladders that extend and retract at one end.

5. The ladder according to claim 4, characterized in that, The first telescopic ladder includes a first sub-ladder and a second sub-ladder nested within the first sub-ladder and slidable relative to the first sub-ladder; wherein, The second sub-ladder is provided with a plurality of third locking holes, which are arranged at intervals along the length of the second sub-ladder; It also includes a first locking pin, which passes through the first ladder and can be inserted into the third locking hole.

6. The ladder according to claim 4, characterized in that, The horizontal support ladder is a second telescopic ladder that extends and retracts at both ends.

7. The ladder according to claim 6, characterized in that, The second telescopic ladder includes a third sub-ladder and a fourth and a fifth sub-ladder nested within the third sub-ladder, wherein the fourth and fifth sub-ladders are slidably connected to the third ladder. The fourth sub-ladder is provided with a plurality of fourth locking holes, which are arranged at intervals along the length of the fourth sub-ladder; The fifth sub-ladder is provided with a plurality of fifth locking holes, which are arranged at intervals along the length of the fifth sub-ladder; It also includes a second locking pin and a third locking pin; the second locking pin passes through the third sub-ladder and can be inserted into the fourth locking hole; the third locking pin passes through the third sub-ladder and can be inserted into the fifth locking hole.

8. The ladder according to claim 7, characterized in that, The third ladder is equipped with a footboard.

9. The ladder according to claim 4, characterized in that, The number of supporting ladders is five.

Images