Telescopic device of book ladder wheel

Abstract

The utility model discloses a telescopic device for book ladder wheels, which comprises a ladder, a handrail is mounted at the top of the ladder, a mounting plate is mounted at the bottom of the ladder, moving wheels are mounted at the bottom of the mounting plate, and support columns are movably connected to the outer walls of the moving wheels. The utility model relates to the technical field of telescopic devices of book ladder wheels, through the cooperation of a bidirectional screw rod, a sleeve and a fixed block, the sleeve is moved through the rotation of the bidirectional screw rod, and when the sleeve drives a mounting block to move, a supporting column stretches out a moving wheel under the action of a torsion spring, so that a ladder is supported; when the ladder is not used, the two-way lead screw is reversely rotated, the sleeve drives the supporting column to move, the moving wheels are folded, and therefore the ladder is fixed, and the problem that when the ladder is used in the prior art, due to the fact that the size of the ladder is large, and the pressure on the telescopic column is large, the ladder is prone to being damaged is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of a retractable device for a book ladder wheel, in particular to a retractable device for a book ladder wheel. Background Art

[0002] The book storage space in the library is limited. In order to increase the book storage capacity of the library, books are often stored on bookshelves, which greatly increases the storage capacity of books in the library. However, since the bookshelves are too high, it is extremely inconvenient to take books. In order to facilitate the retrieval of books, book ladders are often needed.

[0003] In the prior art, when the book ladder is in use, moving wheels are installed at the bottom, and the moving wheels use telescopic columns to adjust the positions of the moving wheels so that the book ladder can be retracted when not in use to avoid instability during use.

[0004] However, in actual use, when the telescopic column is used to drive the moving wheels for a long time, due to the large size of the ladder, the pressure on the telescopic column is large, which makes it very easy to be damaged during use and cannot be used normally. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a retractable device for ladder wheels, which solves the problem that when a telescopic column is used to drive the moving wheels for a long time in actual use, the ladder is easily damaged during use due to the large volume of the ladder, which causes the telescopic column to exert great pressure, resulting in the ladder being unable to be used normally.

[0006] To achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a retractable device of a ladder wheel comprises a ladder, the top of the ladder is provided with a handrail, the bottom of the ladder is provided with a mounting plate, the bottom of the mounting plate is provided with a moving wheel, the outer wall of the moving wheel is movably connected with a pillar, the top of the pillar is provided with a telescopic structure, the telescopic structure comprises a two-way screw rod, a sleeve, a mounting block, a torsion spring and a fixed block, the top of the pillar is rotatably connected with the mounting block, the outer wall of the mounting block is fixedly connected with a torsion spring, the outer wall of the torsion spring is fixedly connected to the outer wall of the pillar, the outer wall of the pillar is fitted with a fixed block, the outer wall of the fixed block is fixedly connected to the bottom of the mounting block, the outer wall of the mounting block is fixedly connected to the sleeve, the outer wall of the sleeve is slidably clamped to the inner wall of the mounting plate, the inner wall of the sleeve is movably connected with a two-way screw rod, and the outer wall of the two-way screw rod is rotatably connected to the inner wall of the mounting plate through a bearing.

[0007] Preferably, a servo motor is fixedly connected to the bottom of the mounting plate, the output end of the servo motor extends to the inside of the mounting plate and is fixedly connected to a driving gear, the outer wall of the driving gear is meshingly connected to a driven gear, and the outer wall of the driven gear is fixedly connected to the outer wall of the bidirectional screw.

[0008] Preferably, a clamping block is fixedly connected to the inner wall of the mounting plate, an outer wall of the clamping block is fitted to the outer wall of the pillar, a buckle is inserted into the inner wall of the mounting plate, and one end of the buckle is fixedly connected to a fixing seat.

[0009] Preferably, a telescopic slot is provided at the top of the ladder, a telescopic column is inserted into the inner wall of the telescopic slot, the top of the telescopic column is fixedly connected to the bottom of the handrail, the inner wall of the telescopic column is fixedly connected to a spring, both ends of the spring are fixedly connected to protruding blocks, the outer walls of the two protruding blocks are movably inserted into the inner wall of the telescopic column, and the outer walls of the protruding blocks fit the top of the ladder.

[0010] Preferably, a limiting groove is provided at the top of the ladder, a limiting column is inserted into the inner wall of the limiting groove, and one end of the limiting column is fixedly connected to the bottom of the handrail.

[0011] Beneficial Effects

[0012] The utility model provides a retractable device for ladder wheels. The utility model has the following beneficial effects: the retractable device for ladder wheels cooperates with a bidirectional screw, a sleeve and a fixed block, and the sleeve is moved by rotating the bidirectional screw, and when the sleeve drives the mounting block to move, the pillar extends the moving wheel under the action of the torsion spring, thereby supporting the ladder and enabling it to move, and when not in use, the sleeve drives the pillar to move by rotating the bidirectional screw in the opposite direction, and the moving wheel is retracted, thereby fixing the ladder, solving the problem of the prior art that the ladder is easy to be damaged due to the large volume of the ladder and the large pressure on the telescopic column when in use.

[0013] Through the cooperation of the spring, the protruding block and the telescopic column, when the handrail is upgraded, the telescopic column is moved out of the telescopic groove by working the handrail, so that the protruding block is extended under the action of the spring, and when the spring extends the protruding block, the telescopic column is stuck on the top of the ladder, thereby fixing the handrail and making it more stable when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the appearance of the utility model;

[0016] Figure 3 for Figure 1 Schematic diagram of the structure of the middle mounting plate, moving wheel and bidirectional screw rod;

[0017] Figure 4 for Figure 1 Structural diagram of the middle ladder, limit column and telescopic column;

[0018] Figure 5 for Figure 1 Schematic diagram of the structure of the mounting plate, bidirectional lead screw and servo motor.

[0019] In the figure: 1. ladder, 2. mounting plate, 3. handrail, 4. limit column, 5. telescopic column, 6. moving wheel, 7. bidirectional screw, 8. sleeve, 9. servo motor, 10. driven gear, 11. mounting block, 12. pillar, 13. clamping block, 14. fixing seat, 15. buckle, 16. fixing block, 17. torsion spring, 18. spring, 19. protruding block, 20. telescopic slot, 21. limit slot, 22. driving gear. DETAILED DESCRIPTION

[0020] 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.

[0021] However, in actual use, when the telescopic column is used to drive the moving wheels for a long time, due to the large size of the ladder, the pressure on the telescopic column is large, which makes it very easy to be damaged during use and cannot be used normally.

[0022] In view of this, the utility model provides a retractable device for the ladder wheels, which solves the problem that when a telescopic column is used to drive the moving wheels for a long time in actual use, the telescopic column is easily damaged during use and cannot be used normally due to the large size of the ladder.

[0023] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process.

[0024] Embodiment 1: Figure 1-5It can be seen that the retractable device of the ladder wheel includes a ladder 1, a handrail 3 is installed on the top of the ladder 1, a mounting plate 2 is installed on the bottom of the ladder 1, a moving wheel 6 is installed on the bottom of the mounting plate 2, the outer wall of the moving wheel 6 is movably connected with a pillar 12, the pillar 12 is used to support the moving wheel 6, and a telescopic structure is installed on the top of the pillar 12, the telescopic structure includes a bidirectional screw rod 7, a sleeve 8, a mounting block 11, a torsion spring 17 and a fixed block 16, the top of the pillar 12 is rotatably connected with the mounting block 11, the outer wall of the mounting block 11 is fixedly connected with the torsion spring 17, and the outer wall of the torsion spring 17 is The wall is fixedly connected to the outer wall of the pillar 12, the outer wall of the pillar 12 is fitted with a fixing block 16, the outer wall of the fixing block 16 is fixedly connected to the bottom of the mounting block 11, the outer wall of the mounting block 11 is fixedly connected to the sleeve 8, the outer wall of the sleeve 8 is slidably clamped to the inner wall of the mounting plate 2, the inner wall of the sleeve 8 is movably connected to the bidirectional screw rod 7, the bidirectional screw rod 7 is used to drive the sleeve 8 to move, so that the pillar 12, under the action of the torsion spring 17, makes the moving wheel 6 extend out of the opening at the bottom of the mounting plate 2 to support the ladder 1, and the outer wall of the bidirectional screw rod 7 is rotatably connected to the inner wall of the mounting plate 2 through the bearing;

[0025] In the specific implementation process, it is worth pointing out that, under the cooperation of the bidirectional screw rod 7, the sleeve 8 and the fixing block 16, the sleeve 8 is moved by rotating the bidirectional screw rod 7, and when the sleeve 8 drives the mounting block 11 to move, the support 12 is extended by the torsion spring 17 to support the ladder 1, so that it can move, and when not in use, the sleeve 8 drives the support 12 to move by rotating the bidirectional screw rod 7 in the opposite direction, and the moving wheel 6 is retracted, so that the ladder 1 is fixed;

[0026] Further, a servo motor 9 is fixedly connected to the bottom of the mounting plate 2, and an output end of the servo motor 9 extends to the inside of the mounting plate 2 and is fixedly connected to a driving gear 22, and an outer wall of the driving gear 22 is meshedly connected to a driven gear 10, and an outer wall of the driven gear 10 is fixedly connected to an outer wall of the bidirectional screw rod 7, wherein the model of the servo motor 9 is not limited;

[0027] In the specific implementation process, it is worth pointing out that, under the cooperation of the servo motor 9, the driving gear 22 and the driven gear 10, the servo motor 9 is used to drive the driving gear 22 to rotate, so that the two-way screw rod 7 is rotated through the meshing of the driving gear 22 and the driven gear 10, thereby extending the moving wheel 6;

[0028] Furthermore, a block 13 is fixedly connected to the inner wall of the mounting plate 2, and the outer wall of the block 13 is attached to the outer wall of the pillar 12. A buckle 15 is inserted into the inner wall of the mounting plate 2, and one end of the buckle 15 is fixedly connected to the fixing seat 14.

[0029] In the specific implementation process, it is worth pointing out that, with the cooperation of the block 13, the fixing seat 14 and the mounting plate 2, when the moving wheel 6 is retracted, the fixing seat 14 will support the mounting plate 2;

[0030] Specifically, when using the retractable device of the ladder wheel, the servo motor 9 is used to drive the driving gear 22 to rotate, so that it engages with the driven gear 10, and then drives the bidirectional screw rod 7 to rotate, and the sleeve 8 drives the mounting block 11 to move, so that the support 12 extends the moving wheel 6 under the action of the torsion spring 17, so that the ladder 1 can be supported, and when the moving wheel 6 is retracted, the fixed seat 14 will contact the ground, thereby supporting the ladder 1, making it more stable when in use.

[0031] Embodiment 2: By Figure 1-5 It can be seen that a telescopic slot 20 is provided at the top of the ladder 1, a telescopic column 5 is inserted into the inner wall of the telescopic slot 20, the top of the telescopic column 5 is fixedly connected to the bottom of the handrail 3, a spring 18 is fixedly connected to the inner wall of the telescopic column 5, both ends of the spring 18 are fixedly connected to protruding blocks 19, the outer walls of the two protruding blocks 19 are movably inserted into the inner wall of the telescopic column 5, and the outer walls of the protruding blocks 19 are attached to the top of the ladder 1;

[0032] In the specific implementation process, it is worth pointing out that, under the cooperation of the telescopic slot 20, the telescopic column 5 and the spring 18, when the armrest 3 is raised or lowered, the telescopic column 5 is moved out of the telescopic slot 20, so that the protruding block 19 inside it is extended under the action of the spring 18, and the telescopic column 5 is fixed by the protruding block 19, and the telescopic column 5 is retracted by pressing the protruding block 19;

[0033] Furthermore, a limiting groove 21 is provided at the top of the ladder 1, and a limiting column 4 is inserted into the inner wall of the limiting groove 21, and one end of the limiting column 4 is fixedly connected to the bottom of the handrail 3;

[0034] In the specific implementation process, it is worth pointing out that, with the cooperation of the limiting groove 21 and the limiting column 4, when the armrest 3 is adjusted, the limiting column 4 will be driven to move in the limiting groove 21, so that the armrest 3 is more stable when moving;

[0035] Specifically, on the basis of the above embodiment, when adjusting the position of the handrail 3, the telescopic column 5 is moved out of the telescopic groove 20, so that the protruding block 19 pops out from the inside of the telescopic column 5 and is stuck on the top of the ladder 1, thereby supporting the handrail 3, and the handrail 3 is retracted by pressing the protruding block 19.

[0036] 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. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0037] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0038] Although 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 retractable device for a ladder wheel, comprising a ladder (1), Features: A handrail (3) is installed at the top of the ladder (1), a mounting plate (2) is installed at the bottom of the ladder (1), a moving wheel (6) is installed at the bottom of the mounting plate (2), the outer wall of the moving wheel (6) is movably connected to a support (12), and a telescopic structure is installed at the top of the support (12); The telescopic structure comprises a bidirectional screw rod (7), a sleeve (8), a mounting block (11), a torsion spring (17) and a fixing block (16); The top of the pillar (12) is rotatably connected to a mounting block (11); the outer wall of the mounting block (11) is fixedly connected to a torsion spring (17); the outer wall of the torsion spring (17) is fixedly connected to the outer wall of the pillar (12); the outer wall of the pillar (12) is fitted with a fixing block (16); the outer wall of the fixing block (16) is fixedly connected to the bottom of the mounting block (11); the outer wall of the mounting block (11) is fixedly connected to a sleeve (8); the outer wall of the sleeve (8) is slidably engaged with the inner wall of the mounting plate (2); the inner wall of the sleeve (8) is movably connected to a bidirectional screw rod (7); the outer wall of the bidirectional screw rod (7) is rotatably connected to the inner wall of the mounting plate (2) via a bearing.

2. The retractable device of the book ladder wheel according to claim 1, Features: A servo motor (9) is fixedly connected to the bottom of the mounting plate (2); an output end of the servo motor (9) extends to the inside of the mounting plate (2) and is fixedly connected to a driving gear (22); an outer wall of the driving gear (22) is meshingly connected to a driven gear (10); and an outer wall of the driven gear (10) is fixedly connected to an outer wall of a bidirectional screw rod (7).

3. The retractable device of the book ladder wheel according to claim 1, Features: The inner wall of the mounting plate (2) is fixedly connected with a clamping block (13), the outer wall of the clamping block (13) is fitted to the outer wall of the pillar (12), the inner wall of the mounting plate (2) is plugged with a buckle (15), and one end of the buckle (15) is fixedly connected with a fixing seat (14).

4. The retractable device of the book ladder wheel according to claim 1, Features: The top of the ladder (1) is provided with a telescopic slot (20), the inner wall of the telescopic slot (20) is plugged with a telescopic column (5), the top of the telescopic column (5) is fixedly connected to the bottom of the handrail (3), the inner wall of the telescopic column (5) is fixedly connected with a spring (18), both ends of the spring (18) are fixedly connected with protruding blocks (19), the outer walls of the two protruding blocks (19) are movably plugged into the inner wall of the telescopic column (5), and the outer walls of the protruding blocks (19) are in contact with the top of the ladder (1).

5. The retractable device of the book ladder wheel according to claim 1, Features: A limiting groove (21) is provided at the top of the ladder (1), a limiting column (4) is inserted into the inner wall of the limiting groove (21), and one end of the limiting column (4) is fixedly connected to the bottom of the handrail (3).

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