A polyurethane buffer for a household ladder

Abstract

The present invention discloses a polyurethane buffer for a household ladder, which includes a polyurethane buffer pad. A mounting groove is fixedly connected to the top of the polyurethane buffer pad. A threaded block is arranged inside the mounting groove. Transmission bins are respectively formed on both sides inside the polyurethane buffer pad. Rotating blocks are respectively arranged on both sides of the polyurethane buffer pad. A worm is fixedly connected to the inner side of the rotating block. The inner side of the worm penetrates into the interior of the transmission bin and is movably connected to a support block through a bearing. The top of the support block is fixedly connected to the top inner wall of the transmission bin. A worm gear is meshed with the bottom of the worm. A gear is fixedly connected to the back of the worm gear. The back of the gear is movably connected to the rear side of the inner wall of the transmission bin through a bearing. The present invention increases the functionality of being convenient for installation and disassembly, enabling it to have the effect of quickly disassembling and assembling the polyurethane buffer, and preventing the situation that the disassembly and installation of the urethane buffer are relatively cumbersome, time-consuming and laborious.

Description

Technical Field

[0001] The present invention relates to the technical field of polyurethane buffers, and specifically to a polyurethane buffer for household ladders. Background Technique

[0002] The polyurethane buffer utilizes the microporous bubble structure of the polyurethane material to absorb energy so as to achieve the purpose of buffering. During the impact process, it is equivalent to a spring with multiple airbag dampers.

[0003] Polyurethane buffers are required at the bottom of household ladders. However, most of the existing polyurethane buffers on the market will wear out during long-term use and need to be replaced. They are usually fixed by bolts during installation, resulting in cumbersome disassembly and installation of the polyurethane buffer, which is time-consuming and laborious and cannot bring convenience to users.

[0004] Therefore, it is necessary to design and transform the polyurethane buffer to effectively prevent the cumbersome, time-consuming and laborious phenomenon of disassembly and installation of the polyurethane buffer. Summary of the Invention

[0005] To solve the problems raised in the above background technique, the purpose of the present invention is to provide a polyurethane buffer for household ladders, which has the advantages of being convenient for installing and disassembling the polyurethane buffer, and solves the problem of cumbersome, time-consuming and laborious disassembly and installation of the polyurethane buffer.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A polyurethane buffer for household ladders, including a polyurethane buffer pad. A mounting groove is fixedly connected to the top of the polyurethane buffer pad. A threaded block is arranged inside the mounting groove. Transmission bins are respectively opened on both sides inside the polyurethane buffer pad. Rotating blocks are arranged on both sides of the polyurethane buffer pad. A worm is fixedly connected to the inner side of the rotating block. The inner side of the worm penetrates into the inside of the transmission bin and is movably connected by a bearing to a support block. The top of the support block is fixedly connected to the top inner wall of the transmission bin. A worm gear is engaged with the bottom of the worm. A gear is fixedly connected to the back of the worm gear. The back of the gear is movably connected to the rear side inner wall of the transmission bin by a bearing. A toothed plate is engaged with the bottom of the gear. A transmission plate is fixedly connected to the inner side of the toothed plate. A limiting block is fixedly connected to the inner side of the transmission plate. A buffer base is sleeved at the bottom of the polyurethane buffer pad. A limiting mechanism is arranged inside the buffer base. The limiting mechanism includes a positioning rod arranged on the left side of the buffer base. The right side of the positioning rod penetrates into the inside of the polyurethane buffer pad. A limiting rod is threadedly connected inside the positioning rod. A fixing block is fixedly connected to the right side of the limiting rod. A clamping rod is slidably connected inside the rotating block. The inner side of the clamping rod penetrates into the inside of the polyurethane buffer pad. A friction pad is fixedly connected to the inner wall of the rotating block. The inner wall of the friction pad is in contact with the surface of the clamping rod.

[0007] Preferably, a slider is fixedly connected to the bottom of the toothed plate, a chute is formed at the top of the inner wall of the transmission bin, and the slider is used in cooperation with the chute.

[0008] Preferably, clamping grooves are formed on both sides of the threaded block, and the clamping grooves are used in cooperation with the limiting blocks.

[0009] Preferably, a limiting post is fixedly connected to the left side of the inner wall of the buffer base groove, and the right side of the limiting post penetrates into the fixing block.

[0010] Preferably, an opening is formed inside the transmission bin, the width of the opening is greater than the width of the limiting block, and the opening is used in cooperation with the limiting block.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] 1. The present invention increases the functionality of being convenient for installation and disassembly, enabling it to quickly disassemble and assemble the polyurethane buffer, and preventing the situation that the disassembly and installation of the urethane buffer are cumbersome, time-consuming and laborious.

[0013] 2. Through the setting of the limiting mechanism, the present invention can assist in fixing the buffer base and prevent the buffer base from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural view of the present invention;

[0015] Figure 2 is a cross-sectional view of the transmission bin of the present invention;

[0016] Figure 3 is the present invention Figure 2 partial enlarged view of A in;

[0017] Figure 4 is a cross-sectional view of the buffer base of the present invention;

[0018] Figure 5 is the present invention Figure 4 partial enlarged view of B in;

[0019] Figure 6 is a three-dimensional view of the clamping rod of the present invention.

[0020] In the figure: 1, polyurethane buffer pad; 2, installation groove; 3, threaded block; 4, transmission chamber; 5, rotating block; 6, worm; 7, support block; 8, worm gear; 9, gear; 10, toothed plate; 11, transmission plate; 12, limit block; 13, buffer base; 14, limiting mechanism; 141, positioning rod; 142, limiting rod; 143, fixing block; 15, clamping rod; 16, friction pad; 17, slider; 18, chute; 19, clamping groove; 20, limiting column; 21, opening. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] As Figures 1 to 6 shown, a household ladder polyurethane buffer provided by the present invention includes a polyurethane buffer pad 1. The top of the polyurethane buffer pad 1 is fixedly connected with an installation groove 2. A threaded block 3 is arranged inside the installation groove 2. Transmission chambers 4 are opened on both sides inside the polyurethane buffer pad 1. Rotating blocks 5 are arranged on both sides of the polyurethane buffer pad 1. A worm 6 is fixedly connected to the inner side of the rotating block 5. The inner side of the worm 6 penetrates into the inside of the transmission chamber 4 and is movably connected with a support block 7 through a bearing. The top of the support block 7 is fixedly connected with the top of the inner wall of the transmission chamber 4. A worm gear 8 is meshed with the bottom of the worm 6. A gear 9 is fixedly connected to the back of the worm gear 8. The back of the gear 9 is movably connected with the rear side of the inner wall of the transmission chamber 4 through a bearing. A toothed plate 10 is meshed with the bottom of the gear 9. A transmission plate 11 is fixedly connected to the inner side of the toothed plate 10. A limit block 12 is fixedly connected to the inner side of the transmission plate 11. A buffer base 13 is sleeved at the bottom of the polyurethane buffer pad 1.

[0023] Referring Figure 4 , a limiting mechanism 14 is arranged inside the buffer base 13. The limiting mechanism 14 includes a positioning rod 141 arranged on the left side of the buffer base 13. The right side of the positioning rod 141 penetrates into the inside of the polyurethane buffer pad 1. A limiting rod 142 is threadedly connected inside the positioning rod 141. A fixing block 143 is fixedly connected to the right side of the limiting rod 142.

[0024] As a technical optimization scheme of the present invention, through the arrangement of the limiting mechanism 14, the buffer base 13 can be assisted in fixing to prevent the buffer base 13 from loosening.

[0025] Referring Figure 3 , a clamping rod 15 is slidably connected inside the rotating block 5. The inner side of the clamping rod 15 penetrates into the inside of the polyurethane buffer pad 1.

[0026] As a technical optimization solution of the present invention, through the setting of the clamping rod 15, the rotating block 5 can be limited, preventing the rotating block 5 from rotating by itself.

[0027] Reference Figure 3 , a friction pad 16 is fixedly connected to the inner wall of the rotating block 5, and the inner wall of the friction pad 16 is in contact with the surface of the clamping rod 15.

[0028] As a technical optimization solution of the present invention, through the setting of the friction pad 16, the friction between the clamping rod 15 and the rotating block 5 can be effectively increased, improving the stability of the clamping rod 15.

[0029] Reference Figure 2 , a slider 17 is fixedly connected to the bottom of the toothed plate 10, and a sliding groove 18 is opened at the top of the inner wall of the transmission chamber 4. The slider 17 and the sliding groove 18 are used in cooperation.

[0030] As a technical optimization solution of the present invention, through the setting of the slider 17 and the sliding groove 18, the toothed plate 10 can be limited, restricting the movement range of the toothed plate 10.

[0031] Reference Figure 2 , clamping grooves 19 are opened on both sides of the threaded block 3, and the clamping grooves 19 are used in cooperation with the limiting blocks 12.

[0032] As a technical optimization solution of the present invention, through the setting of the clamping grooves 19, the limiting blocks 12 can enter the inside of the threaded block 3, thereby fixing the threaded block 3.

[0033] Reference Figure 5 , a limiting column 20 is fixedly connected to the left side of the inner wall of the groove of the buffer base 13, and the right side of the limiting column 20 penetrates into the inside of the fixing block 143.

[0034] As a technical optimization solution of the present invention, through the setting of the limiting column 20, the fixing block 143 can be limited, preventing the fixing block 143 from rotating by itself.

[0035] Reference Figure 2 , an opening 21 is opened inside the transmission chamber 4. The width of the opening 21 is greater than the width of the limiting block 12. The opening 21 and the limiting block 12 are used in cooperation.

[0036] As a technical optimization solution of the present invention, through the setting of the opening 21, the limiting block 12 can completely pass through the opening 21 for mechanical transmission, avoiding the phenomenon that the limiting block 12 is stuck at the opening 21 due to the too narrow width of the opening 21.

[0037] Working principle and usage process of the present invention: During use, the threaded block 3 is installed inside the installation groove 2, and then the user rotates the rotating block 5. The rotating block 5 drives the worm 6 to rotate. The worm 6 meshes with the worm wheel 8 to drive the worm wheel 8 to move inward. The worm wheel 8 drives the gear 9 to rotate. The gear 9 meshes with the toothed plate 10 to drive the toothed plate 10 to move inward. The toothed plate 10 drives the transmission plate 11 to move inward. The transmission plate 11 drives the limit block 12 to move inward. The limit block 12 enters the inside of the card slot 19, thereby fixing the threaded block 3, facilitating the installation of the polyurethane buffer pad 1. Then, the buffer base 13 is installed inside the polyurethane buffer pad 1. The positioning rod 141 is inserted into the buffer base 13 and penetrates into the inside of the polyurethane buffer pad 1. The limit rod 142 is inserted into the inside of the groove through the fixing block 143 and enters the inside of the positioning rod 141. The positioning rod 141 is rotated to thread-connect the positioning rod 141 and the limit rod 142, fixing the buffer base 13.

[0038] In summary, for this household ladder polyurethane buffer, due to its functionality that facilitates installation and disassembly, it has the effect of quickly disassembling and assembling the polyurethane buffer, preventing the situation where the disassembly and installation of the urethane buffer are relatively cumbersome, time-consuming, and laborious, and solving the problem that the disassembly and installation of the urethane buffer are relatively cumbersome, time-consuming, and laborious.

[0039] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polyurethane buffer for a household ladder, comprising a polyurethane buffer pad (1), characterized in that: The top of the polyurethane buffer pad (1) is fixedly connected with an installation groove (2). A threaded block (3) is arranged inside the installation groove (2). Transmission bins (4) are respectively arranged on both sides inside the polyurethane buffer pad (1). Rotating blocks (5) are arranged on both sides of the polyurethane buffer pad (1). A worm (6) is fixedly connected to the inner side of the rotating block (5). The inner side of the worm (6) penetrates into the inside of the transmission bin (4) and is movably connected with a support block (7) through a bearing. The top of the support block (7) is fixedly connected with the top inner wall of the transmission bin (4). A worm gear (8) is engaged with the bottom of the worm (6). A gear (9) is fixedly connected to the back of the worm gear (8). The back of the gear (9) is movably connected with the rear side inner wall of the transmission bin (4) through a bearing. A toothed plate (10) is engaged with the bottom of the gear (9). A transmission plate (11) is fixedly connected to the inner side of the toothed plate (10). A limiting block (12) is fixedly connected to the inner side of the transmission plate (11). A buffer base (13) is sleeved on the bottom of the polyurethane buffer pad (1). A limiting mechanism (14) is arranged inside the buffer base (13). The limiting mechanism (14) includes a positioning rod (141) arranged on the left side of the buffer base (13). The right side of the positioning rod (141) penetrates into the inside of the polyurethane buffer pad (1). A limiting rod (142) is threadedly connected inside the positioning rod (141). A fixing block (143) is fixedly connected to the right side of the limiting rod (142). A clamping rod (15) is slidably connected inside the rotating block (5). The inner side of the clamping rod (15) penetrates into the inside of the polyurethane buffer pad (1). A friction pad (16) is fixedly connected to the inner wall of the rotating block (5). The inner wall of the friction pad (16) is in contact with the surface of the clamping rod (15).

2. The polyurethane buffer of a household ladder according to claim 1, wherein: A slider (17) is fixedly connected to the bottom of the toothed plate (10). A sliding groove (18) is opened on the top inner wall of the transmission bin (4). The slider (17) is used in cooperation with the sliding groove (18).

3. The polyurethane buffer of a household ladder according to claim 1, characterized in that: Card slots (19) are respectively opened on both sides of the threaded block (3). The card slots (19) are used in cooperation with the limiting blocks (12).

4. The polyurethane buffer of a household ladder according to claim 2, characterized in that: A limiting column (20) is fixedly connected to the left side of the inner wall of the groove of the buffer base (13). The right side of the limiting column (20) penetrates into the inside of the fixing block (143).

5. The polyurethane buffer of a household ladder according to claim 1, characterized in that: An opening (21) is opened on the inner side of the transmission bin (4). The width of the opening (21) is greater than the width of the limiting block (12). The opening (21) is used in cooperation with the limiting block (12).

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