A smooth elevator

Abstract

This invention discloses a stable lifting ladder, comprising: a telescopic ladder mechanism including an outer ladder and an inner ladder slidably mounted on the outer ladder; and a support mechanism including a connecting shaft at the end of the outer ladder and a stabilizing part on the connecting shaft. By setting the support mechanism, when adjusting the tilt angle of the telescopic ladder mechanism, rotating the telescopic ladder mechanism causes the shaft to rotate inside the through slot. As the telescopic ladder mechanism rotates, the mounting block rotates, and the first adjustment holes on it rotate accordingly. Multiple first adjustment holes sequentially overlap with second adjustment holes. When the rotation reaches a suitable angle, a pin is simultaneously inserted into the first and second adjustment holes, maintaining a fixed angle between the telescopic ladder mechanism and the stabilizing frame. After adjustment, the stabilizing frame contacts the ground, and the friction between the stabilizing part and the ground further stabilizes the telescopic ladder mechanism.

Description

Technical Field

[0001] This invention relates to the technical field of elevators, and more particularly to a smooth elevator. Background Technology

[0002] A ladder is a common tool. Through the inner and outer ladders, the length of the entire ladder can be adjusted to suit different working environments. When taking it out and storing it, the ladder can be folded into its shortest state for easy carrying and storage.

[0003] When existing elevators are placed against a wall, the end in contact with the ground is prone to slippage, especially when people reach the top of the elevator. Gravity makes it easier for the elevator to move. At this time, another person needs to hold the elevator at the bottom. Otherwise, the bottom of the elevator will slip and the tilt angle will change, which may cause people to fall from the elevator. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the current stable elevators, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a smooth elevator.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a smooth lifting ladder, comprising a telescopic ladder mechanism, including an outer ladder and an inner ladder slidably disposed on the outer ladder; and a support mechanism, including a connecting shaft portion disposed at the end of the outer ladder and a stabilizing portion disposed on the connecting shaft portion.

[0008] As a preferred embodiment of the smooth lifting ladder of the present invention, the connecting shaft includes a mounting block fixed to the end of the outer ladder and a shaft body disposed on the mounting block; the stabilizing part includes a stabilizing frame with a through groove, the stabilizing frame being sleeved on the outside of the shaft body through the through groove; the mounting block has a plurality of first adjustment holes arranged circumferentially around the shaft body, and the stabilizing frame has a plurality of second adjustment holes.

[0009] In a preferred embodiment of the smooth lifting ladder of the present invention, the stabilizing part further includes a positioning member, which includes an extension block disposed on the stabilizing frame and a fixing pin slidably disposed on the extension block.

[0010] As a preferred embodiment of the stable elevator of the present invention, the extension block is provided with nail holes, and the inner side of the top hole is provided with anti-detachment protrusions;

[0011] The side wall of the fixing nail is provided with an anti-loosening groove, and the outer side of the fixing nail is provided with anti-slip texture.

[0012] As a preferred embodiment of the smooth lifting ladder of the present invention, the outer ladder includes two main side beams, a main footboard fixed between the two main side beams, and an inner rail component disposed on the side wall of the main side beams;

[0013] The inner ladder includes two secondary side beams, a secondary footrest fixed between the two secondary side beams, and a set of side wheels disposed on the side wall of the secondary side beams;

[0014] The side wheel assembly is slidably positioned on the inside of the inner rail component.

[0015] As a preferred embodiment of the smooth lifting elevator described in this invention, it further includes:

[0016] The drive mechanism includes a hand-cranked drive unit disposed on the outer ladder and a transmission unit disposed between the outer ladder and the inner ladder;

[0017] The pre-locking mechanism includes a rotating part disposed on the secondary side beam, a snap-fit ​​part disposed on the rotating part, and a locking part disposed on the main side beam.

[0018] In a preferred embodiment of the smooth lifting ladder of the present invention, the hand-cranked drive unit includes a main gear, a secondary gear, and a handle; the main gear is rotatably mounted on the main side beam; the secondary gear is mounted on the transmission unit and meshes with the main gear; the handle is fixed to the side wall of the main gear.

[0019] The transmission unit includes a follower shaft, a first gear, and a first rack; the follower shaft is rotatably disposed between two main side beams; the first gear is fixedly sleeved on the outside of the follower shaft, and its position corresponds to the position of the secondary side beam; the first rack is disposed on the secondary side beam and meshes with the first gear; the secondary gear is fixedly sleeved on the outside of the follower shaft.

[0020] In a preferred embodiment of the smooth lifting elevator of the present invention, the rotating part includes an I-beam wheel that is rotatable and disposed on the secondary side beam, and a second gear disposed at the end of the I-beam wheel;

[0021] The main side beam has a side groove on its side wall, and a second rack is provided on the inner side of the side groove. The second gear meshes with the second rack.

[0022] In a preferred embodiment of the smooth lifting ladder of the present invention, the locking part includes a rotating wheel, a spring element, and a locking element; the rotating wheel is fixed to one side of the second gear and has an installation groove thereon;

[0023] The elastic element is disposed inside the mounting groove; the locking element is mounted on the elastic element.

[0024] As a preferred embodiment of the smooth lifting ladder of the present invention, the locking part includes an extension beam integrally formed on the main side beam and a corresponding beam fixed to the main side beam.

[0025] The extension beam has several positive positioning grooves; the corresponding beam has several reverse positioning grooves.

[0026] The locking component includes a sleeve block slidably connected to the elastic component, a sleeve fixed to the side wall of the sleeve block, and an arc-shaped block fixed to the end of the sleeve.

[0027] The beneficial effects of this invention are as follows: By setting up a support mechanism, when adjusting the tilt angle of the telescopic ladder mechanism, rotating the telescopic ladder mechanism causes the shaft to rotate inside the through slot. When the telescopic ladder mechanism rotates, the mounting block rotates, and the first adjustment hole opened on it rotates accordingly. Multiple first adjustment holes coincide with the second adjustment hole in sequence. When the rotation reaches a suitable angle, the pin is inserted into the first adjustment hole and the second adjustment hole simultaneously, so that the telescopic ladder mechanism and the stabilizing frame maintain a fixed angle. After the adjustment is completed, the stabilizing frame contacts the ground, and the friction between the stabilizing part and the ground makes the telescopic ladder mechanism more stable. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0029] Figure 1 This is a schematic diagram of the overall structure of the smooth lifting elevator of the present invention.

[0030] Figure 2 This is an exploded view of the support mechanism structure of the smooth lifting elevator of the present invention.

[0031] Figure 3 This is an exploded view of the positioning component structure of the smooth lifting elevator of the present invention.

[0032] Figure 4 This is a schematic diagram of the support structure of the stable lifting elevator of the present invention.

[0033] Figure 5This is a schematic diagram of the hand-cranked drive unit and the locking unit of the smooth lifting elevator of the present invention.

[0034] Figure 6 This is a schematic diagram of the side wheel assembly and rotating part of the smooth lifting elevator of the present invention.

[0035] Figure 7 This is a schematic diagram of the transmission unit structure of the smooth lifting elevator of the present invention.

[0036] Figure 8 This is a cross-sectional view of the snap-fit ​​structure of the smooth lifting ladder of the present invention.

[0037] Figure 9 This is a schematic diagram of the locking mechanism of the smooth lifting elevator of the present invention. Detailed Implementation

[0038] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0039] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0040] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0041] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0042] Example 1

[0043] Reference Figure 1 A schematic diagram of the overall structure of a smooth elevator is provided, such as... Figure 1A stable elevator includes a telescopic elevator mechanism 100, comprising an outer ladder 101 and an inner ladder 102 slidably mounted on the outer ladder 101; and a support mechanism 200. The inner ladder 102 and the outer ladder 101 can move relative to each other, thereby achieving the effect of adjusting the length of the telescopic elevator mechanism 100. Through the support mechanism 200, when the elevator is supported by an external object, the support mechanism 200 can increase the friction between the elevator and the ground, making the elevator more stable during use.

[0044] Specifically, the support mechanism 200 includes a connecting shaft 201 located at the end of the outer ladder 101 and a stabilizing part 202 located on the connecting shaft 201. The stabilizing part 202 and the outer ladder 101 can rotate relative to each other. When the stabilizing part 202 contacts the ground, the placement angle of the telescopic ladder can be adjusted. After placement, the stabilizing part 202 has a larger ground contact area relative to the bottom of the telescopic ladder mechanism 100, and its bottom is covered with anti-slip textures 202b-6. Through the friction between the stabilizing part 202 and the ground, the telescopic ladder mechanism 100 becomes more stable.

[0045] Furthermore, the connecting shaft portion 201 includes a mounting block 201a fixed to the end of the outer ladder 101, and a shaft body 201b disposed on the mounting block 201a; the stabilizing portion 202 includes a stabilizing frame 202a, on which a through groove 202a-1 is provided. The stabilizing frame 202a is sleeved on the outside of the shaft body 201b through the through groove 202a-1. There are two mounting blocks 201a. The shaft body 201b is installed between the two mounting blocks 201a. The two sides of the stabilizing frame 202a are in contact with the two mounting blocks 201a respectively. The stabilizing frame 202a can move and rotate.

[0046] Multiple first adjustment holes 201a-1 are provided on the mounting block 201a, which are arranged circumferentially around the shaft 201b. Multiple second adjustment holes 202a-2 are provided on the stabilizing frame 202a. When it is necessary to adjust the tilt angle of the telescopic ladder mechanism 100, the telescopic ladder mechanism 100 is rotated, which drives the shaft 201b to rotate inside the through groove 202a-1. When the telescopic ladder mechanism 100 rotates, the mounting block 201a rotates, and the first adjustment holes 201a-1 provided on it rotate accordingly. The multiple first adjustment holes 201a-1 coincide with the second adjustment holes 202a-2 in sequence. When the rotation reaches the appropriate angle, the pin is inserted into the first adjustment holes 201a-1 and the second adjustment holes 202a-2 at the same time, so that the telescopic ladder mechanism 100 and the stabilizing frame 202a maintain a fixed angle.

[0047] Operation process: When it is necessary to adjust the tilt angle of the telescopic ladder mechanism 100, rotate the telescopic ladder mechanism 100, causing the shaft 201b to rotate inside the through groove 202a-1. When the telescopic ladder mechanism 100 rotates, the mounting block 201a rotates, and the first adjustment hole 201a-1 opened on it rotates accordingly. Multiple first adjustment holes 201a-1 successively overlap with the second adjustment hole 202a-2. When the rotation reaches the appropriate angle, insert the pin into the first adjustment hole 201a-1 and the second adjustment hole 202a-2 at the same time, so that the telescopic ladder mechanism 100 and the stabilizing frame 202a maintain a fixed angle. After the adjustment is completed, the stabilizing frame 202a contacts the ground. Through the friction between the stabilizing part 202 and the ground, the telescopic ladder mechanism 100 becomes more stable.

[0048] Example 2

[0049] Reference Figures 1 to 4 This embodiment differs from the first embodiment in that the stabilizing part 202 further includes a positioning member 202b, which includes an extension block 202b-1 disposed on the stabilizing frame 202a and a fixing nail 202b-2 slidably disposed on the extension block 202b-1. When the ground is muddy and there are no external objects supporting the elevator, the stabilizing frame 202a can be fixed to the ground by the fixing nail 202b-2, without the need for another person to support the elevator from below.

[0050] Specifically, the extension block 202b-1 has a nail hole 202b-3, and the inner side of the top hole has an anti-detachment protrusion 202b-4; the side wall of the fixing nail 202b-2 has an anti-detachment groove 202b-5, and the outer side of the fixing nail 202b-2 has an anti-slip texture 202b-6. The fixing nail 202b-2 can move up and down along the nail hole 202b-3, so that the fixing nail 202b-2 slides and connects to the inner side of the nail hole 202b-3. When the fixing nail 202b-2 is located inside the nail hole 202b-3, the anti-detachment protrusion 202b-4 is located inside the anti-detachment groove 202b-5, which can prevent the fixing nail 202b-2 from detaching from the inner side of the nail hole 202b-3.

[0051] The rest of the structure is the same as in Example 1.

[0052] Operating procedure: When the ground is muddy and there are no external objects to support the elevator, place the stabilizing frame 202a on the ground. By hammering the fixing nail 202b-2, the fixing nail 202b-2 can be hammered into the mud, so that the stabilizing frame 202a is fixed on the ground. At this time, after adjusting the position and angle of the elevator, the angle between the elevator and the stabilizing frame 202a can be fixed by inserting the pin into the first adjustment hole 201a-1 and the second adjustment hole 202a-2 at the same time. The elevator can be stabilized without the need for external support.

[0053] Example 3

[0054] Reference Figures 1 to 9 This embodiment differs from the previous embodiments in that the smooth lifting elevator also includes a drive structure, including a hand-cranked drive unit 301 disposed on the outer ladder 101 and a transmission unit 302 disposed between the outer ladder 101 and the inner ladder 102. When the hand-cranked drive unit 301 rotates, it can drive the inner ladder 102 to slide. By cranking the hand-cranked drive unit 301, the transmission unit 302 is driven to work. The transmission unit 302 can drive the inner ladder 102 to move. The relative displacement between the outer ladder 101 and the inner ladder 102 can adjust the overall length between the outer ladder 101 and the inner ladder 102. The hand-cranked drive unit 301 and the transmission unit 302 replace the pull rope for lifting, avoiding the problems of pull rope being easy to tangle and easy to age.

[0055] Specifically, the outer ladder 101 includes two main side beams 101a, a main footrest 101b fixed between the two main side beams 101a, and an inner rail 101c disposed on the side wall of the main side beams 101a; the inner ladder 102 is slidably connected to the outer ladder 101 through the inner rail 101c, so that when the transmission part 302 transmits power to the inner ladder 102, the inner ladder 102 can undergo relative displacement with the outer ladder 101, thereby increasing the overall length of the telescopic ladder mechanism 100.

[0056] The inner ladder 102 includes two secondary side beams 102a, a secondary footrest 102b fixed between the two secondary side beams 102a, and a side wheel assembly 102c disposed on the side wall of the secondary side beams 102a. The side wheel assembly 102c is slidably disposed on the inner side of the inner rail 101c. When relative displacement occurs between the inner ladder 102 and the outer ladder 101, the side wheel assembly 102c rolls on the inner side of the inner rail 101c. During the rolling process, the friction force drives the side wheel assembly 102c to rotate, thereby converting hard friction into rolling friction and reducing the resistance when the inner ladder 102 is displaced.

[0057] The side wheel assembly 102c includes several side wheels. Several mounting holes are provided on the secondary side beam 102a along the edge direction. An I-shaped wheel is rotatably fitted inside each mounting hole. The side wheels are connected to the secondary side beam 102a through the I-shaped wheel, enabling them to rotate.

[0058] The inner rail component 101c is a rectangular strip structure, which is fixed to the side of the two main side beams 101a that are close to each other. The inner side has a track cavity to accommodate the side wheel assembly 102c, and a through groove is provided on the side near the secondary side beam 102a. An opening is provided at one end of the inner rail component 101c. When there is relative displacement between the inner ladder 102 and the outer ladder 101, part of the side wheel assembly 102c can extend from the opening to the outside of the inner rail component 101c. The diameter of the side wheel is matched with the width of the track cavity, which can prevent the side wheel from shaking in the track cavity, thereby preventing the entire inner ladder 102 from shaking.

[0059] Furthermore, the hand-cranked drive unit 301 includes a main gear 301a, a secondary gear 301b, and a handle 301c; the main gear 301a is rotatably mounted on the main side beam 101a; the secondary gear 301b is mounted on the transmission unit 302 and meshes with the main gear 301a; the handle 301c is fixed to the side wall of the main gear 301a; when the main gear 301a rotates, it can drive the transmission unit 302 through the secondary gear 301b, thereby causing relative displacement between the inner ladder 102 and the outer ladder 101.

[0060] A fixed shaft 301a-1 is fixed to the side wall of the main side beam 101a. A gear groove is provided on the fixed shaft 301a-1. The main gear 301a is rotatably but immovably sleeved on the bearing of the fixed shaft 301a-1. The operator can rotate the main gear 301a by holding the handle 301c. The rotation of the main gear 301a drives the secondary gear 301b to rotate, which in turn drives the transmission part 302, causing relative displacement between the inner ladder 102 and the outer ladder 101.

[0061] Furthermore, the transmission unit 302 includes a follower shaft 302a, a first gear 302b, and a first rack 302c. The follower shaft 302a is rotatably disposed between two main side beams 101a. The first gear 302b is fixedly sleeved on the outside of the follower shaft 302a, and its position corresponds to the position of the secondary side beam 102a. The first rack 302c is disposed on the secondary side beam 102a and meshes with the first gear 302b. The secondary gear 301b is fixedly sleeved on the outside of the follower shaft 302a. Both secondary side beams 102a are provided with first racks 302c. There are two first gears 302b on the outside of the follower shaft 302a. When the secondary gear 301b rotates, it can drive the follower shaft 302a to rotate. The rotation of the follower shaft 302a can drive the first gear 302b to rotate. The rotation of the second gear 401c drives the second rack 102a-2 to cause displacement of the inner ladder 102.

[0062] Bearings are installed on both main side beams 101a. The two ends of the rotating shaft 302a are fixed to the inner side of the bearing inner ring and pass through the main side beam 101a. The auxiliary gear 301b and the first gear 302b are fixedly sleeved on the outer side of the rotating shaft 302a. The auxiliary gear 301b and the first gear 302b can rotate synchronously with the rotating shaft 302a.

[0063] The rest of the structure is the same as in Example 2.

[0064] Operation process: When the length of the elevator needs to be adjusted, the main gear 301a can be rotated forward or backward by the handle 301c. The rotation of the main gear 301a drives the auxiliary gear 301b to rotate, which in turn drives the rotating shaft 302a to rotate. The rotation of the rotating shaft 302a drives the two first gears 302b to rotate. The two first gears 302b simultaneously push the first rack 302c, so that the two secondary side beams 102a are pushed, which in turn drives the entire inner ladder 102 to move. By moving the inner ladder 102 relative to the outer ladder 101, the length of the entire telescopic ladder mechanism 100 can be adjusted.

[0065] Example 4

[0066] Reference Figures 1 to 9 This embodiment differs from the above embodiments in that the stable elevator further includes a pre-locking mechanism 400, which includes a rotating part 401 disposed on the secondary side beam 102a, a locking part 402 disposed on the rotating part 401, and a locking part 403 disposed on the main side beam 101a. When the secondary side beam 102a drives the rotating part 401 to undergo relative displacement with the main side beam 101a, the rotating part 401 can drive the locking part 402 to rotate synchronously. When the locking part 402 rotates, it can intermittently engage with the locking part 403, thereby pre-positioning the outer elevator 101 and the inner elevator 102.

[0067] Specifically, the rotating part 401 includes an H-beam wheel 401a rotatably disposed on the secondary side beam 102a, and a second gear 401c disposed at the end of the H-beam wheel 401a; a side groove 102a-1 is provided on the side wall of the main side beam 101a, and a second rack 102a-2 is provided on the inner side of the side groove 102a-1. The second gear 401c meshes with the second rack 102a-2. When the secondary side beam 102a moves, it can drive the second gear 401c to move. When the second gear 401c moves, the second rack 102a-2 remains stationary and drives the second gear 401c to rotate, thereby driving the locking part 402 to rotate. The locking part 402 moves and rotates, and can intermittently engage with the locking part 403.

[0068] Furthermore, the engaging part 402 includes a rotating wheel 402a, a spring member 402b, and a locking member 402c; the rotating wheel 402a is fixed to one side of the second gear 401c and has an installation groove 402a-1; the spring member 402b is disposed inside the installation groove 402a-1; the locking member 402c is mounted on the spring member 402b; when the rotating wheel 402a moves and rotates with the second gear 401c, the locking member 402c can intermittently engage with the locking part 403; when the locking member 402c contacts the non-locking position of the locking part 403, the locking member 402c transmits pressure to the spring member 402b, causing the spring member 402b to compress; when the locking member 402c is displaced and rotated to the locking position of the locking part 403, the spring member 402b pushes the locking member 402c into the locking position of the locking part 403.

[0069] The locking part 403 includes an extension beam 403a integrally formed on the main side beam 101a and a corresponding beam 403b fixed to the main side beam 101a; the extension beam 403a has a plurality of forward positioning grooves 403a-1; the corresponding beam 403b has a plurality of reverse positioning grooves. When the locking member 402c is displaced and rotated to a direction perpendicular to the extension beam 403a, the locking member 402c enters the inner side of the forward positioning groove 403a-1, at which time the telescopic ladder mechanism 100 cannot extend. When c is perpendicular to the direction of beam 403b, the locking piece 402c enters the inner side of the reverse positioning groove. At this time, the telescopic ladder mechanism 100 cannot retract. When the operator holds the outer ladder 101 and pushes the entire telescopic ladder mechanism 100, the locking piece 402c and the reverse positioning groove can be locked, preventing the telescopic ladder mechanism 100 from retracting. When the operator holds the outer ladder 101 and drags the entire telescopic ladder mechanism 100, the locking piece 402c and the forward positioning groove 403a-1 can be locked, preventing the telescopic ladder mechanism 100 from growing.

[0070] The locking component 402c includes a sleeve block 402c-1 slidably connected to the elastic component 402b, a sleeve 402c-2 fixed to the side wall of the sleeve block 402c-1, and an arc-shaped block 402c-3 fixed to the end of the sleeve 402c-2; for each rotation of the rotating wheel 402a in the first direction, the arc-shaped block 402c-3 engages with the reverse positioning groove and the forward positioning groove 403a-1 once in sequence.

[0071] The elastic component 402b includes an inner post 402b-1 and a return spring 402b-2. An anti-detachment plate 402b-3 is provided at the end of the inner post 402b-1. The sleeve block 402c-1 is sleeved on the outside of the inner post 402b-1 and cannot pass through the anti-detachment plate 402b-3. The inner diameter of the sleeve 402c-2 is adapted to the diameter of the anti-detachment plate 402b-3. One side of the arc block 402c-3 is arc-shaped, and the opposite side is flat. When the arc block 402c-3 is engaged with the inside of the forward positioning groove 403a-1 or the reverse positioning groove, it can limit the rotation of the arc block 402c-3 in the arc direction.

[0072] Furthermore, a number of safety pin holes 101a-1 are provided on the main side beam 101a, and a number of positioning holes 102a-3 are provided on the secondary side beam 102a. When the main side beam 101a and the secondary side beam 102a are relatively displaced, the positioning holes 102a-3 coincide with a number of safety pin holes 101a-1 in sequence. When the positioning holes 102a-3 and the safety pin holes 101a-1 coincide, the safety pins are inserted into the inner side of the positioning holes 102a-3 and the safety pin holes 101a-1, which can lock the positions of the outer ladder 101 and the inner ladder 102.

[0073] The distance between the reverse positioning groove and the adjacent forward positioning groove 403a-1 is equal to the distance between the safety pin hole 101a-1 and the adjacent safety pin hole 101a-1. Whenever the locking piece 402c engages with the reverse positioning groove or the forward positioning groove 403a-1, the positioning hole 102a-3 will coincide with one of the corresponding safety pin holes 101a-1. By checking whether the locking piece 402c engages with the forward positioning groove 403a-1 or the reverse positioning groove, it can be determined whether the positioning hole 102a-3 coincides with the safety pin hole 101a-1, thus avoiding the need to adjust the telescopic ladder mechanism 100 again based on the position of the positioning hole 102a-3 and the safety pin hole 101a-1.

[0074] Furthermore, an adjustment groove is made on the rotating wheel 402a, and a slider is slidably set on the sleeve block 402c-1. When the telescopic ladder mechanism 100 is retracted, the reset spring 402b-2 is pressed by the sleeve block 402c-1, and then the slider part is slid to the inside of the adjustment groove to lock the position of the sleeve block 402c-1, so as to prevent the locking part 402c and the locking part 403 from contacting each other when rotating, so that the entire telescopic ladder mechanism 100 can retract normally. A threaded hole is also made on the main gear 301a, and a locking bolt is connected through the threaded hole. The locking bolt passes through the threaded hole and presses against the main side beam 101a, which can lock the position of the main gear 301a and assist the pre-locking mechanism 400 in locking.

[0075] The rest of the structure is the same as in Example 3.

[0076] Operation process: On the telescopic ladder mechanism 100 that needs to be extended, the main gear 301a is rotated clockwise. The main gear 301a drives the secondary gear 301b to rotate counterclockwise, which in turn causes the shaft 302a and the two first gears 302b to rotate counterclockwise, pushing the inner ladder 102 to extend out of the outer ladder 101. At this time, the secondary side beam 102a pulls the second gear 401c to move synchronously. During the movement of the second gear 401c, it is driven by the second rack 102a-2 to rotate clockwise in the first direction. As the rotating wheel 402a rotates clockwise, the arc-shaped block 402c-3 sequentially engages with the forward positioning groove 403a-1 and the reverse positioning groove. When the appropriate length is reached, the inner ladder 102 is moved to the position corresponding to the forward positioning groove 403a-1 or the reverse positioning groove, thus completing the pre-positioning of the telescopic ladder mechanism 100. When complete positioning is required, the safety pin is inserted into the inside of the positioning hole 102a-3 and the safety pin hole 101a-1, thus completing the complete positioning of the telescopic ladder mechanism 100.

[0077] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0078] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0079] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0080] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A smooth-lifting elevator, characterized in that: include, The telescopic ladder mechanism (100) includes an outer ladder (101) and an inner ladder (102) slidably disposed on the outer ladder (101); and, The support mechanism (200) includes a connecting shaft portion (201) provided at the end of the outer ladder (101) and a stabilizing portion (202) provided on the connecting shaft portion (201). The outer ladder (101) includes two main side beams (101a), a main footrest (101b) fixed between the two main side beams (101a), and an inner rail (101c) disposed on the side wall of the main side beams (101a). The inner ladder (102) includes two secondary side beams (102a), a secondary footrest (102b) fixed between the two secondary side beams (102a), and a side wheel assembly (102c) disposed on the side wall of the secondary side beams (102a). The side wheel assembly (102c) is slidably disposed on the inner side of the inner rail component (101c); The drive mechanism (300) includes a hand-cranked drive unit (301) disposed on the outer ladder (101) and a transmission unit (302) disposed between the outer ladder (101) and the inner ladder (102). The pre-locking mechanism (400) includes a rotating part (401) disposed on the secondary side beam (102a), a snap-fit ​​part (402) disposed on the rotating part (401), and a locking part (403) disposed on the main side beam (101a). The rotating part (401) includes a rotatable I-beam wheel (401a) disposed on the secondary side beam (102a), and a second gear (401c) disposed at the end of the I-beam wheel (401a). The main side beam (101a) has a side groove (102a-1) on its side wall, and a second rack (102a-2) is provided on the inner side of the side groove (102a-1). The second gear (401c) meshes with the second rack (102a-2). The locking part (402) includes a rotating wheel (402a), a spring element (402b), and a locking element (402c); the rotating wheel (402a) is fixed to one side of the second gear (401c), and a mounting groove (402a-1) is provided on it. The elastic element (402b) is disposed inside the mounting groove (402a-1); the locking element (402c) is mounted on the elastic element (402b); The locking part (403) includes an extension beam (403a) integrally formed on the main side beam (101a) and a corresponding beam (403b) fixed to the main side beam (101a). The extension beam (403a) is provided with a plurality of positive positioning grooves (403a-1); the corresponding beam (403b) is provided with a plurality of reverse positioning grooves. The locking component (402c) includes a sleeve (402c-1) slidably connected to the elastic component (402b), a sleeve (402c-2) fixed to the side wall of the sleeve (402c-1), and an arc-shaped block (402c-3) fixed to the end of the sleeve (402c-2).

2. The stable elevator as described in claim 1, characterized in that: The connecting shaft (201) includes a mounting block (201a) fixed to the end of the outer ladder (101) and a shaft (201b) provided on the mounting block (201a). The stabilizing part (202) includes a stabilizing frame (202a) with a through groove (202a-1) thereon. The stabilizing frame (202a) is sleeved on the outside of the shaft (201b) through the through groove (202a-1). The mounting block (201a) has a plurality of first adjustment holes (201a-1) arranged circumferentially around the shaft (201b), and the stabilizing frame (202a) has a plurality of second adjustment holes (202a-2).

3. The stable elevator as described in claim 2, characterized in that: The stabilizing part (202) further includes a positioning member (202b), which includes an extension block (202b-1) disposed on the stabilizing frame (202a) and a fixing pin (202b-2) slidably disposed on the extension block (202b-1).

4. The stable elevator as described in claim 3, characterized in that: The extension block (202b-1) has a nail hole (202b-3), and the inner side of the nail hole (202b-3) has an anti-detachment protrusion (202b-4). The side wall of the fixing nail (202b-2) is provided with an anti-loosening groove (202b-5), and the outside of the fixing nail (202b-2) is provided with anti-slip texture (202b-6).

5. The stable elevator as described in claim 4, characterized in that: The hand-cranked drive unit (301) includes a main gear (301a), a secondary gear (301b), and a handle (301c); the main gear (301a) is rotatably mounted on the main side beam (101a); the secondary gear (301b) is mounted on the transmission unit (302) and meshes with the main gear (301a); the handle (301c) is fixed to the side wall of the main gear (301a). The transmission unit (302) includes a follower shaft (302a), a first gear (302b), and a first rack (302c); the follower shaft (302a) is rotatably disposed between two main side beams (101a); the first gear (302b) is fixedly sleeved on the outside of the follower shaft (302a), and its position corresponds to the position of the secondary side beam (102a); the first rack (302c) is disposed on the secondary side beam (102a), and it meshes with the first gear (302b); the secondary gear (301b) is fixedly sleeved on the outside of the follower shaft (302a).

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