Extension ladder capable of being quickly folded and fixed

Abstract

The utility model discloses an extension ladder capable of being quickly folded and fixed, which relates to the technical field of extension ladders, and adopts the following scheme that the extension ladder comprises a base and an extension ladder mechanism arranged above the base, and the extension ladder mechanism comprises an extension assembly and a folding assembly; the telescopic assembly comprises a fixing frame, a bottom rod, a sleeve rod, a step, a fixing mechanism and a center rod, and the fixing frame is fixedly mounted above the base; by arranging a clamping rod and a spring, in the using process, the left side of the spring and the inner wall of a mounting cavity are mutually fixed, then the right side of the spring and an ejector block are mutually fixed, and after a center rod is contracted into the device, the center rod pushes the clamping rod rightwards to enable the clamping rod to be contracted into the mounting cavity; therefore, the top block can be driven by the clamping rod to move rightwards, at the moment, the spring can be stretched, and after the center rod is contracted into the bottom rod, the clamping rod can move leftwards through the elastic effect of the spring to fix the position of the center rod.

Description

Technical Field

[0001] The utility model relates to the technical field of telescopic ladders, in particular to a telescopic ladder that can be quickly folded and fixed. Background Art

[0002] A telescopic ladder is a portable ladder that can be adjusted in length to suit different working height requirements. This type of ladder is usually composed of multiple overlapping steps, which can be made of metal, wood or other materials. The design of the telescopic ladder allows the user to safely reach a higher working area as needed, and can be reduced in size when not in use for easy storage and carrying.

[0003] However, the telescopic ladders in the prior art are mostly used in a single mode during use and are not convenient to fold. If the ladder is long, even after the telescopic ladder is collapsed, the volume is still large and inconvenient to carry and store, which does not meet people's usage needs. Therefore, a telescopic ladder that can be quickly folded and fixed is needed. Utility Model Content

[0004] The utility model aims to provide a telescopic ladder that can be quickly folded and fixed, which solves the problem that the telescopic ladders in the prior art are mostly used in a single mode during use and are inconvenient to fold. If the ladder is long, even after the telescopic ladder is folded, the volume is still large and inconvenient to carry and store, which does not meet people's usage needs.

[0005] To achieve the above object, the utility model provides the following technical solutions: a telescopic ladder that can be quickly folded and fixed, comprising a base and a telescopic ladder mechanism installed above the base, wherein the telescopic ladder mechanism comprises a telescopic component and a folding component;

[0006] The telescopic assembly includes a fixing frame, a bottom rod, a sleeve rod, a step, a fixing mechanism and a center rod. The fixing frame is fixedly installed on the top of the base, the bottom rod is fixedly installed on the top of the fixing frame, the sleeve rod is installed on the upper end of the bottom rod, the side of the sleeve rod is fixedly installed with a step, the inside of the step is installed with a fixing mechanism, and the top of the bottom rod is installed with a center rod;

[0007] The folding assembly includes a front push rod, a middle rotating shaft, a rear push rod, a connecting rotating shaft and a hydraulic rod. The front push rod is installed on the top of the center rod, the middle rotating shaft is installed on the top of the front push rod, the rear of the middle rotating shaft is connected and installed with the rear push rod, the front of the rear push rod is installed with a connecting rotating shaft, and the front of the connecting rotating shaft is fixedly installed with a hydraulic rod.

[0008] Preferably, the base and the fixing frame are fixed to each other, and the bottom of the base is made of rubber.

[0009] Preferably, the fixing mechanism includes an installation cavity, a lower clamping hole, an upper top hole, a top block, a clamping rod, a spring, a handle bar and an outer slide groove. The left and right sides of the step are provided with installation cavities. A top block is installed inside the installation cavity. A clamping rod is fixedly installed on the left side of the top block. A spring is installed outside the clamping rod. A handle bar is installed in front of the top block. An outer slide groove is provided in front of the installation cavity at a position corresponding to the handle bar. The upper ends of the bottom rod and the center rod are provided with upper top holes, and the bottom of the center rod is provided with a lower clamping hole.

[0010] Preferably, the left side of the spring is fixed to the inner wall of the installation cavity, the right side of the spring is fixed to the top block, and the top block is fixed to the clamping rod.

[0011] Preferably, the size of the upper top hole is the same as that of the lower clamping hole and the upper top hole, the structure of the center rod is the same as that of the bottom rod, and the center rod and the bottom rod are in a nested structure.

[0012] Preferably, the center rod forms a locking structure with the bottom rod through the cooperation between the lower locking hole, the upper top hole and the locking rod, and a telescopic structure is formed between the center rod and the bottom rod.

[0013] Preferably, the front push rod forms a rotating structure with the rear push rod through the middle rotating shaft, and the front push rod forms a rotating structure with the rear push rod through the cooperation between the hydraulic rod and the connecting rotating shaft.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] By setting the clamping rod and the spring, during use, the left side of the spring is fixed to the inner wall of the installation cavity, and then the right side of the spring is fixed to the top block. When the center rod is retracted inside the device, the center rod will push the clamping rod to the right to retract the clamping rod inside the installation cavity. Since the top block and the clamping rod are connected to each other, the top block will be driven to the right by the clamping rod. At this time, the spring will be stretched, and the center rod will be retracted back into the bottom rod. After that, the clamping rod will move to the left through the elastic action of the spring to fix the position of the center rod.

[0016] By setting up a middle shaft and a hydraulic rod, if the device is not high enough during use, the angle can be adjusted by extending the connecting shaft between the front push rod and the rear push rod, and then the middle shaft is supported by the hydraulic rod, so that the device can be supported. It is also convenient for the device to be folded and stored when not in use, and the device is also more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a telescopic ladder that can be quickly folded and fixed proposed by the utility model;

[0018] Figure 2This is a left-side structural schematic diagram of a telescopic ladder that can be quickly folded and fixed proposed by the utility model;

[0019] Figure 3 The utility model provides a telescopic ladder that can be quickly folded and fixed. Figure 2 The enlarged structural diagram at A in the middle;

[0020] Figure 4 This is a cross-sectional structural diagram of a bottom rod of a fixing mechanism of a telescopic ladder that can be quickly folded and fixed proposed by the utility model;

[0021] Figure 5 This is a schematic diagram of the fixing mechanism structure of a telescopic ladder that can be quickly folded and fixed proposed by the utility model;

[0022] Figure 6 The utility model is a schematic diagram of a cross-sectional left view of the bottom rod of a telescopic ladder that can be quickly folded and fixed.

[0023] In the figure: 1. base; 2. fixing frame; 3. bottom rod; 4. sleeve rod; 5. step; 6. fixing mechanism; 601. installation cavity; 602. lower clamping hole; 603. upper top hole; 604. top block; 605. clamping rod; 606. spring; 607. handle; 608. outer slide groove; 7. center rod; 8. front push rod; 9. middle rotating shaft; 10. rear push rod; 11. connecting rotating shaft; 12. hydraulic rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1

[0026] like Figure 1-6 As shown, a telescopic ladder that can be quickly folded and fixed in the figure includes a base 1 and a telescopic ladder mechanism installed above the base 1, and the telescopic ladder mechanism includes a telescopic component and a folding component;

[0027] The telescopic assembly includes a fixed frame 2, a bottom rod 3, a sleeve rod 4, a step 5, a fixing mechanism 6 and a center rod 7. The fixed frame 2 is fixedly installed on the top of the base 1, the bottom rod 3 is fixedly installed on the top of the fixed frame 2, the sleeve rod 4 is installed on the upper end of the bottom rod 3, the side of the sleeve rod 4 is fixedly installed with a step 5, the inside of the step 5 is installed with a fixing mechanism 6, and the top of the bottom rod 3 is installed with a center rod 7;

[0028] The folding assembly includes a front push rod 8, a middle rotating shaft 9, a rear push rod 10, a connecting rotating shaft 11 and a hydraulic rod 12. The front push rod 8 is installed on the top of the center rod 7, the middle rotating shaft 9 is installed on the top of the front push rod 8, the rear of the middle rotating shaft 9 is connected and installed, the front of the rear push rod 10 is installed with the connecting rotating shaft 11, and the front of the connecting rotating shaft 11 is fixedly installed with the hydraulic rod 12.

[0029] The base 1 and the fixing frame 2 are fixed to each other. The bottom of the base 1 is made of rubber. During use, the base 1 can increase the friction between the device and the ground to prevent the device from sliding on the ground during use, thereby improving the safety of the device.

[0030] The fixing mechanism 6 includes an installation cavity 601, a lower clamping hole 602, an upper top hole 603, a top block 604, a clamping rod 605, a spring 606, a handle bar 607 and an outer slide groove 608. The left and right sides of the step 5 are provided with installation cavities 601. The inside of the installation cavity 601 is provided with a top block 604. The left side of the top block 604 is connected and fixedly installed with a clamping rod 605. The outside of the clamping rod 605 is provided with a spring 606. The handle bar 607 is installed in front of the top block 604. An outer slide groove 608 is provided in front of the installation cavity 601 at a position corresponding to the handle bar 607. The upper ends of the bottom rod 3 and the center rod 7 are provided with upper top holes 603, and the bottom of the center rod 7 is provided with lower clamping holes 602.

[0031] The left side of the spring 606 is fixed to the inner wall of the installation cavity 601, the right side of the spring 606 is fixed to the top block 604, and the top block 604 is fixed to the clamping rod 605. During use, the left side of the spring 606 is fixed to the inner wall of the installation cavity 601, and then the right side of the spring 606 is fixed to the top block 604. When the center rod 7 is retracted inside the device, the center rod 7 will push the clamping rod 605 to the right to make the clamping rod 605 retract inside the installation cavity 601. Since the top block 604 and the clamping rod 605 are connected to each other, the top block 604 will be driven to move to the right by the clamping rod 605. At this time, the spring 606 will be stretched, so that the center rod 7 is retracted back into the bottom rod 3. After that, the clamping rod 605 will move to the left through the elastic action of the spring 606 to fix the position of the center rod 7.

[0032] The size of the upper top hole 603 is the same as that of the lower clamping hole 602 and the upper top hole 603. The structure of the center rod 7 is the same as that of the bottom rod 3. The center rod 7 and the bottom rod 3 are in a nested structure. When the center rod 7 moves upward and the device is opened, the lower clamping hole 602 opened at the bottom of the center rod 7 moves to a position overlapping with the upper top hole 603 at the top of the bottom rod 3. The clamping rod 605 will enter the interior of the upper top hole 603 through the elastic action of the spring 606 to clamp the position of the center rod 7 to prevent the center rod 7 from moving downward. At the same time, a center rod 7 with the same structure and nested together is installed on the top of the bottom rod 3, so that the center rod 7 at the top can also move in the same way. When the device needs to be retracted, the user can retract it by moving the handle 607 to the right to make the clamping rod 605 leave the interior of the center rod 7.

[0033] The center rod 7 forms a locking structure with the bottom rod 3 through the cooperation between the lower locking hole 602, the upper top hole 603 and the locking rod 605. The center rod 7 and the bottom rod 3 are in a telescopic structure. When the upward moving device of the center rod 7 is opened, the lower locking hole 602 opened at the bottom of the center rod 7 moves to a position overlapping with the upper top hole 603 at the top of the bottom rod 3. The locking rod 605 will enter the interior of the upper top hole 603 through the elastic action of the spring 606 to lock the position of the center rod 7 to prevent the center rod 7 from moving downward.

[0034] Example 2

[0035] like Figure 1 , Figure 2 As shown, this embodiment further illustrates Example 1, the front push rod 8 forms a rotating structure with the middle rotating shaft 9 and the rear push rod 10, and the front push rod 8 forms a rotating structure with the rear push rod 10 through the cooperation between the hydraulic rod 12 and the connecting rotating shaft 11. During use, if the device is not high enough, the connecting rotating shaft 11 between the front push rod 8 and the rear push rod 10 can be extended to adjust the angle, and then the middle rotating shaft 9 is supported by the hydraulic rod 12, so that the device can be supported, and it is also convenient for the device to be folded and stored when not in use, and the device is also more stable.

[0036] Working principle: First, the base 1 can increase the friction between the device and the ground during use, prevent the device from sliding on the ground during use, and improve the safety of the device. Then, the left side of the spring 606 is fixed to the inner wall of the installation cavity 601, and then the right side of the spring 606 is fixed to the top block 604. When the center rod 7 is retracted inside the device, the center rod 7 will push the card rod 605 to the right to make the card rod 605 retract inside the installation cavity 601. Since the top block 604 and the card rod 605 are connected to each other, the top block 604 will be driven to the right by the card rod 605. At this time, the spring 606 will be stretched, so that the center rod 7 is retracted back to the bottom rod 3, and the card rod 605 will be pushed by the spring The elastic action of spring 606 moves the center rod 7 to the left to fix the position of the center rod 7. When the center rod 7 moves upward and the device is opened, the lower clamping hole 602 opened at the bottom of the center rod 7 moves to a position that coincides with the upper top hole 603 at the top of the bottom rod 3. The clamping rod 605 enters the interior of the upper top hole 603 through the elastic action of spring 606 to clamp the position of the center rod 7 to prevent the center rod 7 from moving downward. At the same time, a center rod 7 with the same structure and fitted together is installed on the top of the bottom rod 3, so that the center rod 7 at the top also moves in the same way. When the device needs to be retracted, the user moves the handle 607 to the right to make the clamping rod 605 leave the interior of the center rod 7 to achieve retraction.

[0037] At the same time, if the device is not high enough during use, the angle can be adjusted by extending the connecting shaft 11 between the front push rod 8 and the rear push rod 10, and then the middle shaft 9 is supported by the hydraulic rod 12 to support the device. It is also convenient to fold and store the device when not in use, and the device is also more stable.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A telescopic ladder that can be quickly folded and fixed, comprising a base (1) and a telescopic ladder mechanism installed above the base (1), characterized in that: The telescopic ladder mechanism comprises a telescopic component and a folding component; The telescopic assembly comprises a fixing frame (2), a bottom rod (3), a sleeve rod (4), a step (5), a fixing mechanism (6) and a center rod (7); the fixing frame (2) is fixedly mounted above the base (1); the bottom rod (3) is fixedly mounted on the top of the fixing frame (2); the sleeve rod (4) is mounted on the upper end of the bottom rod (3); the step (5) is fixedly mounted on the side of the sleeve rod (4); the fixing mechanism (6) is mounted inside the step (5); and the center rod (7) is mounted on the top of the bottom rod (3); The folding assembly comprises a front push rod (8), a middle rotating shaft (9), a rear push rod (10), a connecting rotating shaft (11) and a hydraulic rod (12); the front push rod (8) is installed on the top of the center rod (7); the middle rotating shaft (9) is installed on the top of the front push rod (8); the rear of the middle rotating shaft (9) is connected and installed with the rear push rod (10); the front of the rear push rod (10) is installed with the connecting rotating shaft (11); and the front of the connecting rotating shaft (11) is fixedly installed with the hydraulic rod (12).

2. The telescopic ladder that can be quickly folded and fixed according to claim 1, characterized in that: The base (1) and the fixing frame (2) are fixed to each other, and the bottom of the base (1) is made of rubber.

3. The telescopic ladder that can be quickly folded and fixed according to claim 1, characterized in that: The fixing mechanism (6) comprises an installation cavity (601), a lower clamping hole (602), an upper top hole (603), a top block (604), a clamping rod (605), a spring (606), a handle bar (607) and an outer slide groove (608). The left and right sides of the step (5) are provided with installation cavities (601). The installation cavity (601) is provided with a top block (604). The left side of the top block (604) is connected and fixedly installed with a clamping rod (605). The outside of the clamping rod (605) is provided with a spring (606). The handle bar (607) is installed in front of the top block (604). The outer slide groove (608) is provided in front of the installation cavity (601) at a position corresponding to the handle bar (607). The upper ends of the bottom rod (3) and the center rod (7) are provided with upper top holes (603), and the bottom of the center rod (7) is provided with lower clamping holes (602).

4. The telescopic ladder that can be quickly folded and fixed according to claim 3, characterized in that: The left side of the spring (606) is fixed to the inner wall of the installation cavity (601), the right side of the spring (606) is fixed to the top block (604), and the top block (604) is fixed to the clamping rod (605).

5. The telescopic ladder that can be quickly folded and fixed according to claim 3, characterized in that: The size of the upper top hole (603) is the same as that of the lower clamping hole (602) and the upper top hole (603); the structure of the central rod (7) is the same as that of the bottom rod (3); the central rod (7) and the bottom rod (3) are in a nested structure.

6. The telescopic ladder that can be quickly folded and fixed according to claim 3, characterized in that: The center rod (7) forms a locking structure with the bottom rod (3) through the cooperation between the lower locking hole (602), the upper top hole (603) and the locking rod (605), and the center rod (7) and the bottom rod (3) are in a telescopic structure.

7. The telescopic ladder that can be quickly folded and fixed according to claim 1, characterized in that: The front push rod (8) forms a rotating structure with the rear push rod (10) through the middle rotating shaft (9), and the front push rod (8) forms a rotating structure with the rear push rod (10) through the cooperation between the hydraulic rod (12) and the connecting rotating shaft (11).

Images