Climbing aid with eccentric operating shaft for locking the ladder frame

Abstract

This utility model discloses a climbing device that locks a ladder frame via an eccentric operating shaft, including a climbing platform, a ladder frame, and a locking module. The ladder frame is pivotally connected to the side of the climbing platform to form a supported state and a retracted state. The locking module is set on the climbing platform and has a locking member that extends from the climbing platform toward the ladder frame. This utility model can quickly lock and unlock the ladder frame through the cooperation of the eccentric operating shaft and the locking member. The entire process is simple and convenient. Specifically, to lock the ladder frame, rotate the ladder frame to the supported state. At this time, the end of the locking member is aligned with the limiting part. Then, the locking member moves linearly under the action of the reset member, converting its linear motion into the rotational motion of the eccentric operating shaft, driving the locking member into the extended locking state and inserting into the limiting part. To unlock, an external force drives the eccentric operating shaft to rotate, causing the locking member to move linearly to disengage from the limiting part to complete the unlocking.

Description

Technical Field

[0001] This utility model relates to the field of climbing equipment technology, specifically to a climbing equipment that locks the ladder frame through an eccentric operating shaft. Background Technology

[0002] Climbing equipment, such as workbenches, scaffolding, and ladders, are tools used in industry, construction, maintenance, and various daily activities to provide additional height. These devices are designed to safely elevate workers to the required height to perform specific tasks. Workbenches typically consist of a platform that can be fixed at different heights and are often equipped with guardrails and other safety features to protect the user.

[0003] Currently, most workbenches lock the tabletop and ladder frame using locking pins located on the side of the workbench. The locking pins are inserted into the ladder frame, and when fixing, they are rotated inward to secure them to the side wall of the tabletop, thus achieving the locking between the tabletop and the ladder frame.

[0004] However, this type of fixation in existing technology still has limitations in practical applications, as follows:

[0005] The existing locking pin needs to complete two independent actions: push-pull displacement and thread rotation. The locking / unlocking process is time-consuming, especially when multiple ladder racks are set up. If a locking pin is set on each ladder rack, the locking / unlocking action needs to be repeated many times.

[0006] Meanwhile, the locking mechanism is mostly set on the side of the ladder frame. When the locking pin is pulled out, the pulling direction is perpendicular to the surface of the ladder frame. Therefore, it is easy to interfere with the surrounding equipment in a narrow working space, making it difficult to achieve the locking / unlocking action.

[0007] Therefore, how to overcome the shortcomings of the existing technology mentioned above has become the subject of this utility model. Utility Model Content

[0008] This invention provides a climbing device that locks the ladder frame through an eccentric operating shaft, aiming to solve the technical problems mentioned in the background art.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a climbing device that locks a ladder frame via an eccentric operating shaft, comprising a climbing platform, a ladder frame, and a locking module; the ladder frame is pivotally connected to the side of the climbing platform to form a supported state and a retracted state; the locking module is disposed on the climbing platform and has a locking member, which is positioned from the climbing platform toward the ladder frame and is slidably connected relative to the climbing platform, so that the locking member has two working states: extended locking and retracted unlocking; a limiting part is provided on the ladder frame corresponding to the end of the locking member, and the limiting part is configured to align with the end of the locking member when the ladder frame is in the supported state; the locking module also includes The device includes an eccentric operating shaft rotatably connected to a platform. The end of the eccentric operating shaft has an eccentric portion, and there is an eccentricity between the eccentric portion and the rotation center of the eccentric operating shaft on the platform. The eccentric portion of the eccentric operating shaft intersects with and is connected to a locking member, converting the rotation of the eccentric operating shaft into linear motion of the locking member, driving the locking member to switch between two working states: extended locking and retracted unlocking. When the locking member is in the extended locking state, the end of the locking member engages with a limiting part to complete the locking. When unlocking is required, an external force drives the eccentric operating shaft to rotate, causing the locking member to move linearly to the retracted unlocking position, disengaging from the limiting part to complete the unlocking.

[0010] The relevant content in the above plan is explained as follows:

[0011] In the above scheme, the ladder is pivotally mounted on the side of the climbing platform so that the ladder can be rotated relative to the climbing platform.

[0012] In the above solution, the limiting part can be a hole or a groove, and it is set with the rotating shaft as the center. In this way, as long as the ladder frame rotates, the limiting part can rotate to the position aligned with the locking part.

[0013] In the above solution, the locking and unlocking of the ladder frame can be quickly achieved through the cooperation of the eccentric operating shaft and the locking component. The operation is simple and convenient throughout the process. Specifically, if it is necessary to lock the ladder frame, rotate the ladder frame to the support state. At this time, the end of the locking component is aligned with the limiting part. Then, the locking component moves linearly under the action of the reset component, converting its linear motion into the rotational motion of the eccentric operating shaft, driving the locking component into the extended locking state and inserting into the limiting part. When it is necessary to unlock, the external force drives the eccentric operating shaft to rotate, causing the locking component to move linearly to disengage from the limiting part to complete the unlocking.

[0014] It is important to note that the locking mechanism can automatically enter the extended locking state. Specifically, when the locking mechanism enters the extended locking state, the rotation of the eccentric operating shaft can be achieved through a reset component. That is, during the unlocking process, when an external force drives the eccentric operating shaft to rotate, the locking mechanism moves linearly until it disengages from the limit position, and the reset component is compressed and stores force. When it is necessary to lock the ladder frame, the external force disappears, and the reset component automatically resets, pushing the locking mechanism to move linearly and causing the eccentric operating shaft to rotate in the opposite direction. The linear motion of the locking mechanism is then converted into the rotational motion of the eccentric operating shaft, automatically driving the locking mechanism into the extended locking state.

[0015] It is important to note that the limiting part and locking element on the ladder frame must be arranged with their axes parallel, while the eccentric operating shaft must be perpendicular to the axis of the locking element. Alternatively, replacing the eccentric operating shaft with a cylindrical cam can also convert rotational motion into linear motion; however, in this embodiment, the cylindrical cam must be positioned parallel to the axis of the locking element.

[0016] In a further technical solution, a connecting member is fixedly provided on the locking member. The connecting member has a mating position for insertion corresponding to the eccentric part. Each mating position has an abutment surface on both sides of the eccentric part. When the eccentric operating shaft rotates, the eccentric part is pushed by the abutment surface, which is converted into a linear motion to drive the locking member.

[0017] In the above scheme, the connecting parts can be two fixed plates set on the locking parts. By pushing the two fixed plates with the eccentric part, the rotational motion can be converted into linear motion.

[0018] The contact surface on the connector is the abutment surface that comes into contact with the eccentric part of the eccentric operating shaft. That is, the eccentric part is converted into linear motion of the driving locking part by pressing against the abutment surface.

[0019] A further technical solution includes a insertion groove at the end of the climbing platform, a rotating hole at the bottom of the groove, the groove extending along the length of the climbing platform in the depth direction, and the axis of the groove perpendicular to the axis of the locking member. A rotating column capable of rotating within the groove is provided. One end of the eccentric operating shaft passes through the rotating hole and extends into the rotating column, where it is fixed. The other end is an eccentric portion that engages with the connecting member. The center of the rotating hole is located on the axis of the rotating column and serves as the rotation center of the eccentric operating shaft. The diameter of the rotating hole is greater than or equal to the diameter of the trajectory formed by the circular motion of the eccentric portion.

[0020] A further technical solution, viewed from a cross-sectional perspective, shows that the rotating hole has a first end point and a second end point. When locked, the eccentric part is configured to move to the first end point, and when unlocked, the eccentric part is configured to move to the second end point.

[0021] The locking module can be installed on either the upper or lower surface of the climbing platform, but since the upper surface requires stepping on, it is mostly installed on the lower surface. Meanwhile, the eccentric operating shaft can be fixed using a vertical block installed on the lower surface of the climbing platform; simply pass the eccentric operating shaft through the vertical block. However, this method lacks stability.

[0022] The above design improves the stability of the eccentric operating shaft's rotation.

[0023] The position of the eccentric operating shaft is restricted by a rotating column that can rotate within the insertion slot. This not only hides the eccentric operating shaft inside the platform, reducing the space on the lower surface of the platform, but also makes the eccentric operating shaft more stable during rotation.

[0024] That is, when the eccentric operating shaft is driven to rotate, rotating the rotating column will cause the eccentric operating shaft to rotate within the rotating hole, and the axis of rotation is the axis of the rotating hole.

[0025] A further technical solution includes a fixing sleeve, on which a guide sliding hole is provided along the width direction of the platform and an action conversion hole is provided along the length direction of the platform; the axis of the guide sliding hole is perpendicular to the axis of the action conversion hole, the guide sliding hole is configured to limit the locking member, and the action conversion hole is configured to accommodate the eccentric part; the action conversion hole has two abutment surfaces symmetrically arranged with the axis of the action conversion hole as a reference, and each abutment surface is perpendicular to the axis of the locking member.

[0026] With the above design, the rotational motion of the eccentric part can be converted into the linear motion of the locking part. Although the connecting part can be two fixed pieces set on the locking part, the operation stability is not enough.

[0027] Specifically, when the eccentric operating shaft rotates within the rotating hole, during locking, the eccentric part is configured to move to the first end point, and simultaneously abuts against one of the abutting surfaces. During the movement, the eccentric part pushes the fixing sleeve through the abutting surface to send the locking member into the limiting part. During unlocking, the eccentric part is configured to move to the second end point, at which point the eccentric part abuts against the other abutting surface. During the movement, the eccentric part pushes the fixing sleeve through the abutting surface to move the locking member out of the limiting part.

[0028] In a further technical solution, the limiting part is a limiting hole provided on the ladder frame, and the locking element is a shaft post. With the above design, the locking operation can be achieved simply by inserting the shaft post into the through slot.

[0029] A further technical solution involves providing an elongated groove on the lower surface of the platform, with the rotating hole communicating with the groove. While a sliding groove to accommodate the locking element could be provided on the lower surface of the platform when the rotating column is positioned within the platform via the insertion slot, this operation is cumbersome. Therefore, the elongated groove is directly chosen to accommodate the connecting element and the track. This method is simpler and consumes less material.

[0030] A further technical solution includes a fixing block inside the elongated groove, and a first limiting hole for limiting the locking component; a second limiting hole is provided on the inner sidewall of the elongated groove at a position corresponding to the first limiting hole, and the second limiting hole, the first limiting hole, and the limiting part are coaxially arranged; a track is provided on the climbing platform, and the locking component is slidably connected to the track, which is a linear guide rail defined by the first limiting hole and the second limiting hole.

[0031] The track can also be an independently designed slide, but this operation is more cumbersome. With the above design, the locking element can be quickly guided and limited without adding any parts. Specifically, since the track is a linear guide and is formed by the first limiting hole and the second limiting hole, the locking element can only reciprocate between the first limiting hole and the second limiting hole when it moves.

[0032] In a further technical solution, the connector further includes a locking pin, which is arranged along the axial direction of the actuation conversion hole. The end of the locking pin passes through a guide sliding hole to position and connect the fixing sleeve and the locking member. Although the fixing sleeve and the locking member can be limited by threads or locking pins, the operation is relatively cumbersome. With the locking pin, not only can the fixing sleeve and the locking member be fixedly connected, but they can also be quickly disassembled and assembled.

[0033] In a further technical solution, the connector further includes a reset member, which is sleeved around the locking member and located between the fixing sleeve and the fixing block, so that the fixing sleeve always has a tendency to move linearly toward the limiting part.

[0034] With the above design, the locking element has an automatic locking operation. Specifically, when the locking element moves linearly and disengages from the limiting part to complete the unlocking, the fixed sleeve slides towards the reset element (i.e., the spring) and compresses it. Once the operator releases the rotating column, the fixed sleeve is no longer subjected to external force, and the spring resets, pushing the locking element back into the limiting part to complete the locking.

[0035] It should be noted that although cylindrical cams can also convert rotational operations into linear operations, their automatic reset capability is poor, and once the displacement is large, the cylindrical cam will also be large in size, which will easily occupy a lot of installation space.

[0036] A further technical solution is that the climbing platform is provided with two pairs of ladders, each pair of ladders being fixedly connected by a connecting rod; at least one locking module is provided at each end of the climbing platform.

[0037] That is, each ladder rack can be locked by a locking module, or a pair of ladder racks can be locked by a locking module.

[0038] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0039] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0040] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0041] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the case.

[0042] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0043] The working principle and advantages of this utility model are as follows:

[0044] This invention enables quick locking and unlocking of a ladder frame through the cooperation of an eccentric operating shaft and a locking component. The entire process is simple and convenient. Specifically, to lock the ladder frame, rotate it to the support position. At this time, the end of the locking component aligns with the limiting part. Then, under the action of the reset component, the locking component moves linearly, converting its linear motion into the rotational motion of the eccentric operating shaft, driving the locking component into the extended locking state and inserting it into the limiting part. To unlock, an external force drives the eccentric operating shaft to rotate, causing the locking component to move linearly to disengage from the limiting part to complete the unlocking.

[0045] It is important to note that the locking mechanism can automatically enter the extended locking state. Specifically, when the locking mechanism enters the extended locking state, the rotation of the eccentric operating shaft can be achieved through a reset component. That is, during the unlocking process, when an external force drives the eccentric operating shaft to rotate, the locking mechanism moves linearly until it disengages from the limiting part, and the reset component is compressed and stores force. When it is necessary to lock the ladder frame, the external force disappears, and the reset component automatically resets, pushing the locking mechanism to move linearly and causing the eccentric operating shaft to rotate in the opposite direction. The linear motion of the locking mechanism is then converted into the rotational motion of the eccentric operating shaft, automatically driving the locking mechanism into the extended locking state. In summary, the unlocking method of this application is simple; simply rotating the eccentric operating shaft is enough to drive the locking mechanism to lock and unlock the ladder frame. Furthermore, the locking mechanism will not extend beyond the edge of the platform during movement. Unlike existing technologies, this application has a wide range of applications. Attached Figure Description

[0046] Appendix Figure 1 This is a schematic diagram of the climbing device structure in an embodiment of this utility model;

[0047] Appendix Figure 2 This is a schematic diagram of the locking module structure in an embodiment of the present utility model;

[0048] Appendix Figure 3 This is a front view of the climbing device in the stowed state according to an embodiment of the present utility model;

[0049] Appendix Figure 4 This is a bottom view of the climbing device in the stowed state according to an embodiment of the present utility model;

[0050] Appendix Figure 5 for Figure 4 Enlarged view of section A in the image;

[0051] Appendix Figure 6 This is a front view of the climbing device with the ladder frame in a supported state according to an embodiment of the present utility model;

[0052] Appendix Figure 7 This is a bottom view of the climbing device in the supported state of the ladder frame in this embodiment of the utility model;

[0053] Appendix Figure 8 for Figure 7 A magnified view of section B in the image.

[0054] In the above attached diagrams: 1. Climbing platform; 2. Ladder frame; 3. Locking module; 4. Limiting part; 5. Locking component; 6. Eccentric operating shaft; 7. Connecting component; 8. Track; 9. Eccentric part; 10. Abutment surface; 11. Insertion groove; 12. Rotating hole; 13. Rotating column; 14. Fixing sleeve; 15. Guide sliding hole; 16. Action conversion hole; 17. Long groove; 18. Fixing block; 19. First limiting hole; 20. Second limiting hole; 21. Reset component; 22. Locking pin; 23. First end point; 24. Second end point; Q. Rotation center. Detailed Implementation

[0055] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0056] Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0057] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0058] See appendix Figures 1-8 As shown, a climbing device that locks a ladder frame via an eccentric operating shaft includes a climbing platform 1, a ladder frame 2, and a locking module 3. The ladder frame 2 is pivotally connected to the side of the climbing platform 1 to form a supported state and a retracted state. The locking module 3 is disposed on the climbing platform 1 and has a locking member 5. The locking member 5 is positioned from the climbing platform 1 toward the ladder frame 2 and is slidably connected relative to the climbing platform 1, allowing the locking member 5 to have two working states: extended locking and retracted unlocking. A limiting part 4 is provided on the ladder frame 2 corresponding to the end of the locking member 5. The limiting part 4 is configured to align with the end of the locking member 5 when the ladder frame 2 is in the supported state. The locking module 3 also includes an eccentric operating shaft 6. The eccentric operating shaft 6 is rotatably connected to the platform 1. The end of the eccentric operating shaft 6 has an eccentric part 9, and there is an eccentric distance between the eccentric part 9 and the rotation center of the eccentric operating shaft 6 on the platform 1. The eccentric part 9 of the eccentric operating shaft 6 intersects with and is connected to the locking member 5 to convert the rotation of the eccentric operating shaft 6 into the linear motion of the locking member 5, driving the locking member 5 to switch between two working states: extended locking and retracted unlocking. When the locking member 5 is in the extended locking working state, the end of the locking member 5 engages with the limiting part 4 to complete the locking. When unlocking is required, an external force drives the eccentric operating shaft 6 to rotate, causing the locking member 5 to move linearly to the retracted unlocking working position to disengage from the limiting part 4 and complete the unlocking.

[0059] In this embodiment, the ladder 2 is pivotally mounted on the side of the climbing platform 1 so that the ladder 2 can be rotated relative to the climbing platform 1.

[0060] In this embodiment, the limiting part 4 can be a hole or a groove, and is set with the rotating shaft as the center. In this way, as long as the ladder frame 2 rotates, the limiting part 4 can rotate to the position aligned with the locking member 5.

[0061] In this invention, the locking and unlocking operations of the ladder frame 2 can be quickly achieved through the cooperation of the eccentric operating shaft 6 and the locking member 5. The operation is simple and convenient throughout the process. Specifically, if it is necessary to lock the ladder frame 2, the ladder frame 2 is rotated to the support state. At this time, the end of the locking member 5 is aligned with the limiting part 4. Then, the locking member 5 moves linearly under the action of the reset member. At this time, the linear movement of the locking member 5 is converted into the rotational movement of the eccentric operating shaft 6, which can drive the locking member 5 into the extended locking state and insert it into the limiting part 4. When it is necessary to unlock, the external force drives the eccentric operating shaft 6 to rotate, so that the locking member 5 moves linearly to disengage from the limiting part 4 to complete the unlocking.

[0062] It should be noted that the locking element 5 can automatically enter the extended locking state. Specifically, when the locking element 5 enters the extended locking state, the rotation of the eccentric operating shaft 6 can be achieved by the reset element. That is, during the unlocking process, when the external force drives the eccentric operating shaft 6 to rotate, the locking element 5 moves linearly to disengage from the limiting part 4, and the reset element is compressed and stores force. When it is necessary to lock the ladder frame 2, the external force disappears, and the reset element automatically resets, pushing the locking element 5 to move linearly and causing the eccentric operating shaft 6 to rotate in the opposite direction. The linear motion of the locking element 5 is then converted into the rotational motion of the eccentric operating shaft 6, thereby achieving the purpose of automatically driving the locking element 5 into the extended locking state.

[0063] It should be noted that the limiting part 4 and the locking member 5 on the ladder frame 2 must be arranged with their axes parallel, while the eccentric operating shaft 6 must be perpendicular to the axis of the locking member 5. Alternatively, if the eccentric operating shaft 6 is replaced with a cylindrical cam, the rotational motion can be converted into linear motion; however, in this embodiment, the cylindrical cam must be positioned parallel to the axis of the locking member 5.

[0064] The rotation center of the eccentric part 9 and the eccentric operating shaft 6 on the platform 1 is Q. For example... Figure 5 and Figure 8 As shown.

[0065] The ladder frame 2 is pivotally connected to the side of the climbing platform 1 to form a supported state and a stored state. A locking pin can be installed on the side of the climbing platform 1. In the stored state, the ladder frame 2 can be positioned by the locking pin.

[0066] Preferably, a connector 7 is fixedly provided on the locking member 5. The connector 7 is provided with a mating position for insertion corresponding to the eccentric part 9. A contact surface 10 is provided on each side of the eccentric part 9. When the eccentric operating shaft 6 rotates, the eccentric part 9 is pushed by the contact surface 10, which is converted into a linear motion to drive the locking member 5.

[0067] In this embodiment, the connector 7 can be two fixed pieces set on the locking piece 5. The rotational motion can be converted into linear motion by pushing the two fixed pieces through the eccentric part 9.

[0068] The contact surface 10 on the connector 7 is in contact with the eccentric part 9 of the eccentric operating shaft 6. That is, the eccentric part 9 is converted into linear motion of the driving locking member 5 by pressing against the contact surface 10.

[0069] Preferably, a insertion groove 11 is provided at the end of the climbing platform 1, and a rotating hole 12 is provided at the bottom of the insertion groove 11. The depth direction of the insertion groove 11 extends along the length direction of the climbing platform 1, and the axis of the insertion groove 11 is perpendicular to the axis of the locking member 5. A rotating column 13 that can rotate within the insertion groove 11 is provided. One end of the eccentric operating shaft 6 passes through the rotating hole 12 and extends into the rotating column 13 and is fixed thereto. The other end is an eccentric part 9 and is connected to the connecting member 7. The center of the rotating hole 12 is located on the axis of the rotating column 13 and serves as the rotation center of the eccentric operating shaft 6. The diameter of the rotating hole 12 is greater than or equal to the diameter of the trajectory formed by the circular motion of the eccentric part 9.

[0070] according to Figure 1 and Figure 2 It is known that sealing blocks are detachably connected to both ends of the platform 1, and insertion slots 11 are provided on the sealing blocks. At the same time, the connection between the rotating column 13 and the eccentric part 9 can be a key connection, screw connection, snap-fit ​​connection, or a connection between a protrusion and a groove, etc.

[0071] like Figure 5 and Figure 8 As shown, preferably, when viewed from a cross-sectional angle, the rotating hole 12 has a first end point 23 and a second end point 24. When locked, the eccentric part 9 is configured to move to the first end point 23, and when unlocked, the eccentric part 9 is configured to move to the second end point 24.

[0072] The locking module 3 can be installed on either the upper or lower surface of the platform 1, but since the upper surface requires stepping, it is mostly installed on the lower surface. Meanwhile, the eccentric operating shaft 6 can be fixed by a vertical block installed on the lower surface of the platform 1. When fixing, the eccentric operating shaft 6 can be directly inserted into the vertical block, but this method is not stable enough.

[0073] The above design improves the rotational stability of the eccentric operating shaft 6.

[0074] The position of the eccentric operating shaft 6 is restricted by the rotating column 13 that can rotate within the insertion slot 11. This not only hides the eccentric operating shaft 6 inside the platform 1 and reduces the space on the lower surface of the platform 1, but also makes the eccentric operating shaft 6 more stable during rotation.

[0075] When the eccentric operating shaft 6 is driven to rotate, rotating the rotating column 13 will cause the eccentric operating shaft 6 to rotate within the rotating hole 12, with the axis of rotation being the axis of the rotating hole 12. The linear distance between the first endpoint 23 and the second endpoint 24 is the maximum linear displacement of the eccentric part 9 on the eccentric operating shaft 6, which is the switching amount of the locking member 5 between the two working states of extending for locking and retracting for unlocking.

[0076] like Figure 1 and Figure 2 As shown, preferably, the connecting member 7 includes a fixing sleeve 14, on which a guide sliding hole 15 is provided along the width direction of the climbing platform 1 and an action conversion hole 16 is provided along the length direction of the climbing platform 1; the axis of the guide sliding hole 15 and the axis of the action conversion hole 16 are perpendicular to each other, the guide sliding hole 15 is configured to limit the locking member 5, and the axis of the action conversion hole 16 is configured to accommodate the eccentric part 9; the axis of the action conversion hole 16 has two abutment surfaces 10 symmetrically arranged with the axis of the axis of the action conversion hole 16 as a reference, and each abutment surface 10 is perpendicular to the axis of the locking member 5.

[0077] With the above design, the rotational motion of the eccentric part 9 can be converted into the linear motion of the locking part 5. Although the connecting part 7 can be two fixed pieces set on the locking part 5, the operation stability is not enough.

[0078] Specifically, when the eccentric operating shaft 6 rotates within the rotating hole 12, during locking, the eccentric part 9 is configured to move to the first end point 23, and at the same time, the eccentric part 9 abuts against one of the abutting surfaces 10. During the movement, the abutting surface 10 pushes the fixing sleeve 14 to send the locking member 5 into the limiting part. During unlocking, the eccentric part 9 is configured to move to the second end point 24, at which time the eccentric part 9 abuts against the other abutting surface 10. During the movement, the abutting surface 10 pushes the fixing sleeve 14 to move the locking member 5 out of the limiting part.

[0079] Preferably, the limiting part 4 is a limiting hole provided on the ladder frame 2, and the locking member 5 is a shaft post. With the above design, the locking operation can be achieved by inserting the shaft post into the through slot.

[0080] Preferably, the lower surface of the climbing platform 1 is provided with an elongated groove 17, and the rotating hole 12 communicates with the elongated groove 17. When the rotating column 13 is inside the climbing platform 1 through the insertion groove 11, although the lower surface of the climbing platform 1 can be provided with a sliding groove to accommodate the locking member 5, this operation is rather cumbersome. Therefore, the elongated groove 17 is directly chosen to accommodate the connecting member 7 and the track 8. This operation is simpler and consumes less material.

[0081] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, preferably, a fixing block 18 is provided in the elongated groove 17, and the fixing block 18 is provided with a first limiting hole 19 for limiting the locking member 5; a second limiting hole 20 is provided on the inner sidewall of the elongated groove 17 at a position corresponding to the first limiting hole 19, and the second limiting hole 20, the first limiting hole 19, and the limiting part 4 are coaxially arranged; a track 8 is provided on the climbing platform 1, and the locking member 5 is slidably connected to the track 8. The track 8 is a linear guide rail and is defined by the first limiting hole 19 and the second limiting hole 20.

[0082] The track 8 can also be an independently designed slide, but this operation is more complicated. With the above design, the locking member 5 can be quickly guided and limited without adding any parts. Specifically, since the track 8 is a linear guide rail and is formed by the first limiting hole 19 and the second limiting hole 20, the locking member 5 can only move back and forth between the first limiting hole 19 and the second limiting hole 20 when it moves.

[0083] like Figure 1 and Figure 2 As shown, preferably, the connecting member 7 further includes a locking pin 22, which is arranged along the axial direction of the action conversion hole 16. The end of the locking pin 22 passes through the guide sliding hole 15 to position and connect the fixing sleeve 14 and the locking member 5. Although the fixing sleeve 14 and the locking member 5 can be limited by threads or locking pins, the operation is relatively cumbersome. With the locking pin 22, not only can the fixing sleeve 14 and the locking member 5 be fixedly connected, but they can also be quickly disassembled and assembled.

[0084] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 7 and Figure 8As shown, preferably, the connector 7 further includes a reset member 21, which is sleeved around the locking member 5 and located between the fixing sleeve 14 and the fixing block 18, so that the fixing sleeve 14 always has a tendency to move linearly toward the limiting part.

[0085] With the above design, the locking member 5 has an automatic locking operation. Specifically, when the locking member 5 moves linearly and disengages from the limiting part 4 to complete the unlocking, the fixed sleeve 14 will slide towards the reset member 21 (i.e., the spring) and compress it. Once the operator releases the rotating column 13, the fixed sleeve 14 is no longer subjected to external force, and the spring resets and pushes the locking member 5 back into the limiting part 4 to complete the locking.

[0086] It should be noted that although cylindrical cams can also convert rotational operations into linear operations, their automatic reset capability is poor, and once the displacement is large, the cylindrical cam will also be large in size, which will easily occupy a lot of installation space.

[0087] Preferably, the climbing platform 1 is provided with two pairs of ladder frames 2, and each pair of ladder frames 2 is fixedly connected by a connecting rod; at least one locking module 3 is provided at each end of the climbing platform 1.

[0088] That is, each ladder rack 2 can be locked by locking module 3, or a pair of ladder racks 2 can be locked by one locking module 3.

[0089] Working principle: Please refer to Figure 2 , Figure 5 and Figure 8 As shown, the reset element 21 (i.e., the spring) applies a force to the locking element 5, causing it to always have a tendency to move in a straight line towards the ladder frame 2. The following section will discuss this further. Figure 5 and Figure 8 For example:

[0090] Rotate the ladder frame 2 to the supported position. At this time, the end of the locking member 5 aligns with the limiting part 4 and is inserted into the limiting part 4, completing the locking operation. At this time, the eccentric part 9 is located at the first end point 23. (e.g.) Figure 8 ).

[0091] Subsequently, when unlocking is required, the rotating column 13 is rotated directly, and the eccentric part 9 moves from the first end point 23 to the second end point 24. At the same time, the eccentric part 9 abuts against a contact surface 10 inside the action conversion hole 16. During the movement of the eccentric part 9, the eccentric part 9 pushes the fixing sleeve 14 towards the reset member 21 through the contact surface 10. Since the fixing sleeve 14 is fixedly connected to the locking member 5, the fixing sleeve 14 can push the locking member 5 to move away from the limiting part 4 until it moves out of the limiting part 4, thus completing the unlocking. At the same time, when the locking member 5 moves linearly and disengages from the limiting part 4 to complete the unlocking, the fixing sleeve 14 slides towards the reset member 21 (i.e., the spring) and compresses the reset member 21 (i.e., the spring).

[0092] The operator can then flip the ladder 2 to put it into a stowage state (in this state, the ladder 2 can be limited by the components set on the side of the climbing platform 1).

[0093] Once the operator releases the rotating column 13, the reset component 21 (i.e., the spring) will automatically reset, thereby pushing the fixing sleeve 14 and the locking component 5 toward the ladder frame 2 until the end of the locking component 5 abuts against the side wall of the ladder frame 2 (during this process, the end of the locking component 5 will always abut against the side wall of the ladder frame 2).

[0094] Afterwards, if the operator rotates the ladder frame 2 to the support state again, the locking member 5 will automatically complete the locking operation under the push of the reset member 21 (i.e., the spring). That is, when the end of the locking member 5 abuts against the side wall of the ladder frame 2, the locking operation can be completed without rotating the rotating column 13 (i.e., the end of the locking member 5 will slide on the side wall of the ladder frame 2 until it is aligned with the limiting part 4).

[0095] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A climbing device that locks a ladder frame via an eccentric operating shaft, characterized in that: It includes a climbing platform (1), a ladder (2) and a locking module (3); the ladder (2) is pivotally connected to the side of the climbing platform (1) to form a supported state and a stored state; The locking module (3) is installed on the climbing platform (1). The locking module (3) has a locking member (5). The locking member (5) is installed from the climbing platform (1) toward the ladder frame (2). The locking member (5) is slidably connected to the climbing platform (1) so that the locking member (5) has two working states: extending for locking and retracting for unlocking. The ladder frame (2) is provided with a limiting part (4) corresponding to the end of the locking member (5). The limiting part (4) is configured to be aligned with the end of the locking member (5) when the ladder frame (2) is in the supported state. The locking module (3) also includes an eccentric operating shaft (6), which is rotatably connected to the platform (1). The end of the eccentric operating shaft (6) has an eccentric part (9), and there is an eccentric distance between the eccentric part (9) and the rotation center of the eccentric operating shaft (6) on the platform (1). The eccentric part (9) of the eccentric operating shaft (6) intersects with and is connected to the locking member (5) to convert the rotation of the eccentric operating shaft (6) into the linear motion of the locking member (5), driving the locking member (5) to switch between two working states: extending for locking and retracting for unlocking. When the locking member (5) is in the extended locking working state, the end of the locking member (5) and the limiting part (4) are engaged to complete the locking; when unlocking is required, the external force drives the eccentric operating shaft (6) to rotate, so that the locking member (5) moves linearly to the retracting unlocking working position to disengage from the limiting part (4) to complete the unlocking.

2. The climbing device for locking the ladder frame via an eccentric operating shaft according to claim 1, characterized in that: A connector (7) is fixedly provided on the locking member (5). The connector (7) has a mating position for insertion corresponding to the eccentric part (9). A contact surface (10) is provided on each side of the eccentric part (9). When the eccentric operating shaft (6) rotates, the eccentric part (9) is pushed by the contact surface (10), which is converted into a linear motion to drive the locking member (5).

3. The climbing device for locking the ladder frame via an eccentric operating shaft according to claim 2, characterized in that: The end of the climbing platform (1) is provided with a plug groove (11), the bottom of the plug groove (11) is provided with a rotating hole (12), the depth of the plug groove (11) extends along the length of the climbing platform (1), and the axis of the plug groove (11) is perpendicular to the axis of the locking member (5). A rotating column (13) that can rotate inside the plug groove (11) is provided. One end of the eccentric operating shaft (6) passes through the rotating hole (12) and extends into the rotating column (13) and is fixed thereto. The other end is the eccentric part (9) and is connected to the connecting piece (7). The center of the rotating hole (12) is on the axis of the rotating column (13) and serves as the rotation center of the eccentric operating shaft (6). The diameter of the rotating hole (12) is greater than or equal to the diameter of the trajectory formed by the eccentric part (9) in circular motion.

4. The climbing device for locking the ladder frame via an eccentric operating shaft according to claim 3, characterized in that: Viewed from a cross-sectional perspective, the rotating hole (12) has a first end point (23) and a second end point (24). When locked, the eccentric part (9) is configured to move to the first end point (23), and when unlocked, the eccentric part (9) is configured to move to the second end point (24).

5. The climbing device for locking the ladder frame via an eccentric operating shaft according to claim 3, characterized in that: The connector (7) includes a fixing sleeve (14), which has a guide sliding hole (15) along the width direction of the platform (1) and an action conversion hole (16) along the length direction of the platform (1). The guide slide hole (15) is perpendicular to the axis of the motion conversion hole (16). The guide slide hole (15) is configured to limit the locking member (5). The motion conversion hole (16) is configured to accommodate the eccentric part (9). The motion conversion hole (16) has two abutment surfaces (10) symmetrically arranged with the axis of the motion conversion hole (16) as a reference, and each abutment surface (10) is perpendicular to the axis of the locking member (5).

6. The climbing device for locking the ladder frame via an eccentric operating shaft according to claim 1, characterized in that: The limiting part (4) is a limiting hole provided on the ladder frame (2), and the locking part (5) is a shaft post.

7. The climbing device for locking the ladder frame via an eccentric operating shaft according to claim 5, characterized in that: The lower surface of the platform (1) is provided with a long groove (17), and the rotating hole (12) is connected to the long groove (17).

8. The climbing device for locking the ladder frame via an eccentric operating shaft according to claim 7, characterized in that: The long groove (17) is provided with a fixing block (18), and the fixing block (18) is provided with a first limiting hole (19) for limiting the locking member (5). The inner sidewall of the long groove (17) is provided with a second limiting hole (20) at the position corresponding to the first limiting hole (19). The second limiting hole (20), the first limiting hole (19), and the limiting part (4) are coaxially arranged. A track (8) is provided on the climbing platform (1), and the locking member (5) is slidably connected to the track (8). The track (8) is a linear guide rail and is defined by the first limiting hole (19) and the second limiting hole (20).

9. The climbing device for locking the ladder frame via an eccentric operating shaft according to claim 5, characterized in that: The connector (7) also includes a locking pin (22), which is arranged along the axial direction of the action conversion hole (16). The end of the locking pin (22) passes through the guide slide hole (15) to position and connect the fixing sleeve (14) and the locking member (5).

10. The climbing device for locking the ladder frame via an eccentric operating shaft according to claim 8, characterized in that: The connector (7) further includes a reset member (21), which is sleeved around the locking member (5) and is located between the fixing sleeve (14) and the fixing block (18) so that the fixing sleeve (14) always has a tendency to move in a straight line toward the limiting part.

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