Rotating joint structure and dual-purpose ladder

Abstract

The utility model relates to the field of ladders, in particular to a rotational joint structure and a dual-purpose ladder. The rotating joint structure comprises a first joint plate, a second joint plate and a locking assembly arranged between the first joint plate and the second joint plate. The first joint plate and the second joint plate are rotationally connected through a rotating shaft; the locking assembly comprises a limiting pin and a spring. A limiting part and a guiding part are arranged on the limiting pin, a guiding hole matched with the guiding part in an inserted mode is formed in the first joint plate, and a limiting hole matched with the limiting part in an inserted mode is formed in the second joint plate; the dual-purpose ladder comprises the rotational joint structure, a first ladder body and a second ladder body. According to the dual-purpose ladder, a rotating joint structure with a locking function is adopted, and locking and unlocking can be automatically realized when the dual-purpose ladder is subjected to form conversion, so that the use convenience and safety are greatly improved.

Description

Technical Field

[0001] The present application relates to the field of ladders, and in particular to a rotating joint structure and a dual-purpose ladder. Background Art

[0002] The foldable ladder can be unfolded 180 degrees to form a straight ladder, forming a longer climbing range; it can also be formed into a herringbone ladder at different angles to adapt to various short-distance climbing ranges or facilitate transportation and storage. The foldable ladder usually relies on a joint structure to achieve rotation to change the use state.

[0003] However, the common joint structure currently can only satisfy the rotation function of the foldable dual-purpose ladder to realize the conversion between a stepladder and a straight ladder, but usually does not have a locking function. The ladder needs to be additionally fixed to keep the ladder in the use state of a stepladder or a straight ladder. Therefore, it is relatively cumbersome and inconvenient to use.

[0004] In summary, the existing joint structure mainly relies on simple mechanical rotation to achieve the shape transformation of the ladder, but lacks an effective locking mechanism to ensure the stability of the ladder during use. Therefore, it is necessary to develop a rotating joint structure that can provide stable locking in multiple forms and apply it to foldable dual-purpose ladders to improve user experience and safety. Utility Model Content

[0005] In order to solve the problems in the background technology, the present application provides a rotating joint structure and a dual-purpose ladder using the joint.

[0006] On the one hand, the present application provides a rotary joint structure, which adopts the following technical solution:

[0007] A rotary joint structure comprises a first joint plate, a second joint plate and a locking assembly arranged therebetween;

[0008] The first joint plate and the second joint plate are rotatably connected via a rotating shaft;

[0009] The locking assembly includes a limit pin and a spring; a limit part and a guide part are provided on the limit pin, a guide hole plugged into and matched with the guide part is provided on the first joint plate, and a limit hole plugged into and matched with the limit part is provided on the second joint plate; the limit pin can move along its own axial direction to disengage from the limit hole, and the spring is used to push the limit pin and make the limit pin cooperate with the limit hole.

[0010] By adopting the above technical solution, the elastic force of the spring is used to push the limit pin, so that the limit portion of the limit pin can be firmly inserted into the limit hole of the second joint plate, thereby achieving locking between the first joint plate and the second joint plate, ensuring the stability of the joint structure, and improving the safety performance of the ladder during use. When unlocking is required, the limit pin is pushed to disengage the limit portion from the limit hole.

[0011] Preferably, it further comprises a joint seat, which is arranged between the first joint plate and the second joint plate, the joint seat is fixedly connected to the first joint plate, a mounting groove is formed on the joint seat, and the locking assembly is arranged in the mounting groove.

[0012] By adopting the above technical solution, the locking assembly can be better protected from external damage, and it also helps to improve the installation stability of the locking assembly.

[0013] Preferably, a sleeve is further provided in the installation groove of the joint seat, the sleeve is fixedly connected to the joint seat, and the rotating shaft is passed through the sleeve; the locking assembly is located on the peripheral side of the sleeve.

[0014] By adopting the above technical solution, a sleeve is provided to pass the rotating shaft, which provides stable support for the rotation of the rotating shaft, while also protecting the rotating shaft from wear and tear, thereby extending its service life; the locking assembly is arranged on the peripheral side of the sleeve, which rationally utilizes the space and makes the overall structure more compact.

[0015] Preferably, the locking assembly further comprises a fixing seat, a plurality of limit pins are provided and all are fixedly connected to the fixing seat; one end of the spring is connected to the fixing seat, and the other end is connected to the first joint plate or the second joint plate.

[0016] By adopting the above technical solution, a fixing seat is set to fix multiple limit pins, so that the overall stability of the locking assembly can be improved; the two ends of the spring are respectively connected to the fixing seat and the joint plate, which can ensure that the elastic force of the spring always acts on the limit pin, thereby making the locking more reliable.

[0017] Preferably, a shaft sleeve is provided on the rotating shaft, and the shaft sleeve is connected to the second joint plate and rotates synchronously with the second joint plate.

[0018] By adopting the above technical solution and setting a bushing, a larger contact area is provided for the connection between the rotating shaft and the second joint plate, thereby enhancing the stability of the connection between the two; at the same time, the bushing and the second joint plate rotate synchronously to ensure that the relative position between the two remains unchanged at all times, further improving the overall stability.

[0019] Preferably, the shaft sleeve is inserted into the second joint plate, a slot is formed on the shaft sleeve, and a limiting block engaging with the slot is provided on the second joint plate.

[0020] By adopting the above technical solution, the rotation of the sleeve relative to the second joint plate can be effectively restricted through the engagement between the engaging groove and the engaging block, thereby making the overall rotation more stable and controllable.

[0021] Preferably, the fixing seat is provided with a through hole for the sleeve to pass through, the inner wall of the through hole is provided with a positioning protrusion, the side wall of the sleeve is provided with a positioning hole that cooperates with the positioning protrusion, and there are multiple positioning holes arranged around the circumference of the sleeve.

[0022] By adopting the above technical solution, the positioning pin can be positioned through the cooperation of the positioning protrusion and the positioning hole, so that the limiting pin can accurately cooperate with the limiting hole, thereby making the locking assembly work more stable and reliable.

[0023] Preferably, it also includes a button, including a push cap and a push rod fixed on the push cap; the push cap is arranged on the side of the second joint plate facing away from the first joint plate; the push rod is penetrated through the second joint plate and is used to push the limit pin.

[0024] By adopting the above technical solution, by adding a button and a push rod, a simple unlocking operation method is provided for the user; the user only needs to press the button cap, and the push rod will push the limit pin to move, thereby unlocking the joint plate. This not only improves the user experience, but also makes the unlocking operation safer and more controllable.

[0025] On the other hand, the present application provides a dual-purpose ladder, which adopts the following technical solution:

[0026] A dual-purpose ladder comprises the above-mentioned rotating joint structure, a first ladder body and a second ladder body;

[0027] The rotating joint structure is located at one end of the first ladder body; the first joint plate is fixedly connected to the first ladder body; a fixing part is provided on the second ladder body, and the fixing part is located between the two ends of the second ladder body; the fixing part is fixedly connected to the second joint plate.

[0028] By adopting the above technical solution, the rotating joint structure is combined with the dual-purpose ladder in this way, so that the dual-purpose ladder can realize automatic locking and unlocking functions during the unfolding and folding process, which greatly improves the convenience and safety of using the dual-purpose ladder.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. Since the present application adopts a rotating joint structure with a locking function, the dual-purpose ladder can be automatically locked and unlocked when it is transformed into a certain shape, thereby greatly improving the convenience and safety of use; whether it is used as a straight ladder or a herringbone ladder, it can provide users with a stable climbing platform; users can complete the shape transformation and locking and unlocking functions of the ladder without using additional tools or performing complicated operations, further simplifying the use process;

[0031] 2. The combination of the rotating joint structure and the dual-purpose ladder enables the dual-purpose ladder to be flexibly adjusted according to actual needs during use; whether a longer climbing journey is required or climbing scenes of different distances are adapted, it can be easily achieved, thus meeting the diverse needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is an exploded structural diagram of the revolute joint structure, used to show its structural composition;

[0033] Figure 2 It is a cross-sectional view of the revolute joint structure, used to show the matching relationship of various components;

[0034] Figure 3 It is a structural schematic diagram of a dual-purpose ladder when it is unfolded to a straight ladder state;

[0035] Figure 4 It is a schematic diagram of the structure of a dual-purpose ladder when it is unfolded into a herringbone ladder state.

[0036] Markings in the accompanying drawings: 1. first joint plate; 11. guide hole; 12. rotating shaft; 2. second joint plate; 21. limiting hole; 22. limiting block; 3. locking assembly; 31. limiting pin; 32. spring; 33. fixing seat; 34. bushing; 341. slot; 342. positioning hole; 35. positioning screw; 4. joint seat; 41. mounting slot; 42. sleeve; 5. button; 51. push cap; 52. push rod; 6. first ladder body; 7. second ladder body. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-4 This application is described in further detail.

[0038] Example 1

[0039] This embodiment discloses a rotary joint structure with a locking function, which mainly includes a first joint plate 1, a second joint plate 2 and a locking assembly 3 arranged therebetween.

[0040] The first joint plate 1 and the second joint plate 2 are rotatably connected via a rotating shaft 12, so that the joint structure can be flexibly adjusted between different angles to meet various usage requirements. The rotating shaft 12 ensures the smooth rotation between the first joint plate 1 and the second joint plate 2, providing a basis for the flexibility and stability of the joint structure. In the present application, a bolt is used as the rotating shaft 12 and is equipped with a nut. On the one hand, it ensures the rotation of the first joint plate 1 and the second joint plate 2, and on the other hand, it can axially fix the first joint plate 1 and the second joint plate 2 to ensure the stability of the rotating joint structure.

[0041] The locking assembly 3 includes a limit pin 31 and a spring 32. The limit pin 31 includes a limit portion and a guide portion, and the guide portion cooperates with the guide hole 11 provided on the first joint plate 1 to ensure that the limit pin 31 always maintains stability and accuracy during the movement process. The limit pin 31 is effectively prevented from deflecting or shaking during the movement process, thereby ensuring the reliability of the locking mechanism.

[0042] The second joint plate 2 is provided with a limiting hole 21 that matches the limiting portion. In the locked state, the limiting portion of the limiting pin 31 is inserted into the limiting hole 21, and the first joint plate 1 and the second joint plate 2 are locked together by physical means. The spring 32 is specifically in contact with the first joint plate 1, and the limiting pin 31 is provided with a structure connected to the spring 32, so that the spring 32 compresses and applies a thrust to the limiting pin 31, thereby pushing the limiting pin 31 stably into the limiting hole 21, ensuring the stability and safety of the locking. When the user needs to adjust the joint angle, he only needs to overcome the thrust of the spring 32, so that the limiting pin 31 moves along its own axial direction and disengages from the limiting hole 21, and the joint angle can be easily unlocked and adjusted.

[0043] Example 2

[0044] This embodiment discloses a rotary joint structure with a locking function. Figure 1 and Figure 2 On the basis of Example 1, a fixing seat 33 and a joint seat 4 are added to further enhance the stability and durability of the rotating joint structure.

[0045] The joint seat 4 is arranged between the first joint plate 1 and the second joint plate 2, and is fixedly connected to the first joint plate 1 by screws, thereby improving the structural strength of the rotary joint structure and ensuring the rigidity and stability of the overall structure.

[0046] The joint seat 4 is provided with a mounting groove 41, and the locking assembly 3 is arranged in the mounting groove 41. A sleeve 42 is also arranged at the center of the mounting groove 41 for the shaft 12 to pass through, the spring 32 is sleeved on the sleeve 42, and the limit pin 31 is also arranged in the surrounding area of ​​the sleeve 42, thereby ensuring that the locking assembly 3 will not be disturbed by the rotation of the shaft 12. This layout makes the locking mechanism more reliable and durable.

[0047] The fixing seat 33 is a part of the locking assembly 3, and is used to fix the limit pin 31. Two limit pins 31 are provided and are fixedly connected to the fixing seat 33. A through hole is provided at the center of the fixing seat 33, and the fixing seat 33 is installed in the installation groove 41 and the sleeve 42 passes through.

[0048] The sleeve 42 is also sleeved with a shaft sleeve 34, and the shaft sleeve 34 is located inside the through hole. The shaft sleeve 34 is connected to the second joint plate 2 and rotates synchronously with the second joint plate 2. Specifically, the shaft sleeve 34 is passed through the second joint plate 2, and a slot 341 is provided on the shaft sleeve 34, and a limit block 22 that is engaged with the slot 341 is provided on the second joint plate 2.

[0049] A positioning protrusion is provided on the inner wall of the through hole, and a positioning hole 342 cooperating with the positioning protrusion is provided on the side wall of the sleeve 34. A plurality of positioning holes 342 are provided and surround the circumference of the sleeve 34. Specifically, in the embodiment of the present application, the protrusion is provided by a positioning screw 35, which is screwed on the side wall of the fixing seat 33, and the end of the positioning screw 35 extends into the through hole to form a protrusion.

[0050] When the first joint plate 1 and the second joint plate 2 rotate relative to each other, the fixing seat 33 and the sleeve 34 also rotate relative to each other. At this time, the protrusion can cooperate with each positioning hole 342 successively, and through the cooperation between the positioning holes 342 and the protrusions, the first joint plate 1 and the second joint plate 2 can be rotated step by step.

[0051] In order to facilitate the operation of the limit pin 31, a button 5 is also provided on the second joint plate 2. Specifically, the button 5 includes a push cap 51 and a push rod 52 fixed on the push cap 51; the push cap 51 is arranged on the side of the second joint plate 2 facing away from the first joint plate 1; the push rod 52 is passed through the second joint plate 2 and abuts against the fixed seat 33.

[0052] The implementation principle of Example 2 is as follows: by combining the innovative design of the joint seat 4 and the sleeve 42, the present rotary joint structure significantly improves stability and durability while maintaining flexibility. The introduction of the joint seat 4 enhances the overall rigidity of the structure and protects key components from damage; while the use of the sleeve 42 optimizes the working environment of the rotating shaft 12 and the layout of the locking component 3. These improvement measures together reduce potential risk points, improve performance indicators, and ensure the reliability of the structure in various application scenarios.

[0053] Example 3

[0054] The present application also provides a dual-purpose ladder, referring to Figure 3 and Figure 4, including the rotating joint structure in embodiment 1 or embodiment 2 and the first ladder body 6 and the second ladder body 7; the rotating joint structure is connected to one end of the first ladder body 6; the first joint plate 1 is fixedly connected to the first ladder body 6; the second ladder body 7 is provided with a fixing part, which is located between the two ends of the second ladder body 7; the fixing part is fixedly connected to the second joint plate 2. In this way, the rotating joint structure is combined with the dual-purpose ladder, so that the dual-purpose ladder can realize the automatic locking and unlocking functions during the unfolding and folding process, which greatly improves the convenience and safety of the dual-purpose ladder.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A rotary joint structure, characterized in that: It comprises a first joint plate (1), a second joint plate (2), and a locking assembly (3) arranged therebetween; The first joint plate (1) and the second joint plate (2) are rotatably connected via a rotating shaft (12); The locking assembly (3) comprises a limit pin (31) and a spring (32); a limit portion and a guide portion are provided on the limit pin (31); a guide hole (11) plug-fitting with the guide portion is provided on the first joint plate (1); a limit hole (21) plug-fitting with the limit portion is provided on the second joint plate (2); the limit pin (31) can move along its own axial direction so as to be disengaged from the limit hole (21); the spring (32) is used to push the limit pin (31) and make the limit pin (31) engage with the limit hole (21).

2. The rotary joint structure according to claim 1, characterized in that: It also comprises a joint seat (4), the joint seat (4) being arranged between the first joint plate (1) and the second joint plate (2), the joint seat (4) being fixedly connected to the first joint plate (1), the joint seat (4) being provided with a mounting groove (41), and the locking assembly (3) being arranged in the mounting groove (41).

3. The rotary joint structure according to claim 2, characterized in that: A sleeve (42) is further provided in the mounting groove (41) of the joint seat (4), the sleeve (42) being fixedly connected to the joint seat (4), and the rotating shaft (12) passing through the sleeve (42); the locking assembly (3) is located on the peripheral side of the sleeve (42).

4. The rotary joint structure according to claim 1, characterized in that: The locking assembly (3) further comprises a fixing seat (33), a plurality of limit pins (31) are provided and are all fixedly connected to the fixing seat (33); one end of the spring (32) is connected to the fixing seat (33), and the other end is connected to the first joint plate (1) or the second joint plate (2).

5. The rotary joint structure according to claim 4, characterized in that: The rotating shaft (12) is provided with a shaft sleeve (34), and the shaft sleeve (34) is connected to the second joint plate (2) and rotates synchronously with the second joint plate (2).

6. The revolute joint structure according to claim 5, characterized in that: The shaft sleeve (34) is inserted into the second joint plate (2), a slot (341) is provided on the shaft sleeve (34), and a limit block (22) is provided on the second joint plate (2) for engaging with the slot (341).

7. The rotary joint structure according to claim 5, characterized in that: The fixing seat (33) is provided with a through hole for the shaft sleeve (34) to pass through, the inner wall of the through hole is provided with a positioning protrusion, the side wall of the shaft sleeve (34) is provided with a positioning hole (342) that cooperates with the positioning protrusion, and a plurality of positioning holes (342) are provided and surround the circumference of the shaft sleeve (34).

8. The rotary joint structure according to claim 1, characterized in that: It also comprises a button (5), comprising a push cap (51) and a push rod (52) fixed on the push cap (51); the push cap (51) is arranged on a side of the second joint plate (2) facing away from the first joint plate (1); the push rod (52) is passed through the second joint plate (2) and is used to push the limit pin (31).

9. A dual-purpose ladder, characterized in that: It comprises the rotary joint structure according to any one of claims 1 to 8, a first ladder body (6) and a second ladder body (7); The rotating joint structure is located at one end of the first ladder body (6); the first joint plate (1) is fixedly connected to the first ladder body (6); the second ladder body (7) is provided with a fixing portion, the fixing portion is located between the two ends of the second ladder body (7); the fixing portion is fixedly connected to the second joint plate (2).

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