Stable ladder stand for lead screw maintenance

Abstract

The utility model provides a stable ladder stand for lead screw maintenance, which comprises a ladder stand assembly and an expansion mechanism, the ladder stand assembly comprises a base, two vertical rods and a plurality of cross rods; wherein the two vertical rods are both arranged above the base, the transverse rods are all fixedly connected between the two vertical rods, the extension mechanism is installed in the base, anti-skid mechanisms are installed at the tops of the vertical rods, and supporting mechanisms are installed between the anti-skid mechanisms and the transverse rods; according to the ladder stand, the two sides of the base are extended through the extension mechanisms so as to improve the stability of the bottom of the ladder stand, then the vertical rod is moved to drive the anti-skid mechanism to be clamped with the surface of the lead screw, the supporting mechanism is used for enabling the anti-skid mechanism to be fully attached to the lead screw, and therefore the top of the ladder stand can be limited through the anti-skid mechanism; the stability in the climbing process is guaranteed, the space between the ladder and the lead screw is reduced, and the overhaul difficulty and the safety risk are reduced.

Description

Technical Field

[0001] The utility model relates to a stable ladder, in particular to a stable ladder for screw maintenance, belonging to the technical field of ladders. Background Art

[0002] Screw maintenance is one of the important maintenance items in water conservancy projects, mainly for screws on large water conservancy machinery and equipment, such as the hoist and gate control systems of hydropower stations. The maintenance content mainly includes the appearance, wear condition, connection and tightening status of the screw and nut pair, measuring the key dimensions of the screw such as pitch and diameter, cleaning the dirt on the screw surface, and performing necessary lubrication treatment.

[0003] During routine maintenance of traditional lead screws, the lead screw diameter is usually relatively thin and the surface is coated with a large amount of lubricating oil, which makes traditional ladders unsuitable for climbing work for lead screw maintenance. In order to ensure stability during the climbing process, a stepladder or a vertical lift is usually used. However, when a stepladder or a vertical lift is in use, the lead screw is usually located in the middle of the equipment, so there is a large space between the stepladder or the vertical lift and the lead screw, which increases the difficulty of maintenance and poses a safety risk. Therefore, a stable ladder for lead screw maintenance is proposed. Utility Model Content

[0004] In view of this, the utility model provides a stable ladder for screw maintenance to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial choice.

[0005] The technical solution of the embodiment of the utility model is implemented as follows: a stable ladder for screw maintenance, including a ladder assembly and an expansion mechanism, wherein the ladder assembly includes a base, two uprights and a plurality of crossbars;

[0006] Wherein, the two vertical poles are arranged above the base, the plurality of horizontal poles are fixedly connected between the two vertical poles, the expansion mechanism is installed inside the base, the top of the vertical pole is installed with an anti-slip mechanism, and a support mechanism is installed between the anti-slip mechanism and the horizontal pole;

[0007] Wherein, the extension mechanism is used to extend both sides of the base to increase the overall stability of the ladder;

[0008] Wherein, the anti-slip mechanism is used to engage with the lead screw to limit the top of the ladder;

[0009] Wherein, the support mechanism is used to provide support for the bottom of the anti-slip mechanism so that it can fully fit with the lead screw.

[0010] Further preferably, the expansion mechanism includes a knob, a first screw rod, a second screw rod, two expansion racks, four bases and a slide groove;

[0011] The slide groove is provided on the inner side wall of the base, the two expansion racks are slidably connected to the inside of the slide groove, and the four bases are respectively fixedly connected to the bottom of the two expansion racks.

[0012] Further preferably, the first screw rod and the second screw rod are both rotatably connected to the inner wall of the base, the adjacent ends of the first screw rod and the second screw rod are fixedly connected, the outer walls of the first screw rod and the second screw rod are respectively threadedly connected to the inner walls of the two extension frames, and the knob is fixedly connected to one end of the first screw rod.

[0013] Further preferably, the anti-slip mechanism includes two connecting seats, a connecting shaft, two clamps, two connecting plates, a V-shaped plate and a plurality of convex strips;

[0014] Among them, the two connecting seats are respectively arranged on the top of one side of the two vertical poles, the two clamps are respectively sleeved on the top of the outer side walls of the two vertical poles, the two clamps are respectively threadedly connected to one side of the two connecting seats by bolts, and the connecting shaft is fixedly connected to the other side of the two connecting seats.

[0015] Further preferably, the two connecting plates are fixedly connected to one side of the V-shaped plate, the plurality of convex strips are fixedly connected to the other side of the V-shaped plate, and the inner walls of the two connecting plates are rotatably connected to the outer wall of the connecting shaft through bearings.

[0016] Further preferably, the support mechanism comprises a piston sleeve, a piston rod, a spring and a connecting ring;

[0017] Among them, one end of the piston sleeve is rotatably connected to the outer side wall of one of the cross bars through a bearing, the outer side wall of the piston rod is slidably connected to the inner side wall of the piston sleeve, the connecting ring is hinged to the bottom of the inner side wall of the V-shaped plate, one end of the piston rod is fixedly connected to the outer side wall of the connecting ring, and the spring is fixedly connected between the piston rod and the bottom of the inner side wall of the piston sleeve.

[0018] Further preferably, two connecting members are symmetrically fixedly connected to the upper surface of the base, and two connecting blocks are fixedly connected to the bottoms of the two uprights, and the two connecting blocks are respectively hinged to the inner side walls of the two connecting members.

[0019] Since the embodiment of the utility model adopts the above technical scheme, it has the following advantages: the utility model extends the two sides of the base by utilizing the extension mechanism to improve the stability of the bottom of the ladder, and then drives the anti-skid mechanism to engage with the surface of the screw by moving the vertical rod, and utilizes the supporting mechanism to make the anti-skid mechanism and the screw fully fit, so that the top of the ladder can be limited by the anti-skid mechanism, thereby ensuring the stability during the climbing process, reducing the space between the ladder and the screw, and reducing the difficulty of maintenance and safety risks.

[0020] The above summary is for the purpose of description only and is not limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural diagram of the utility model;

[0023] Figure 2 It is a schematic diagram of a half-section structure of the utility model;

[0024] Figure 3 It is a cross-sectional structural schematic diagram of the base of the utility model;

[0025] Figure 4 For this utility model Figure 2 A schematic diagram of the enlarged structure of region A;

[0026] Figure 5 It is a side structural schematic diagram of the utility model.

[0027] 1. Ladder assembly; 2. Extension mechanism; 3. Anti-skid mechanism; 4. Support mechanism; 101. Base; 102. Vertical rod; 103. Crossbar; 201. Knob; 202. First screw rod; 203. Second screw rod; 204. Extension frame; 205. Base; 206. Slide groove; 301. Connecting seat; 302. Connecting shaft; 303. Clamp; 304. Connecting plate; 305. V-shaped plate; 306. Raised strip; 401. Piston sleeve; 402. Piston rod; 403. Spring; 404. Connecting ring; 51. Connecting piece; 52. Connecting block. DETAILED DESCRIPTION

[0028] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0029] It should be noted that the terms "first", "second", "symmetrical", "array", etc. are only used to distinguish between description and position description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the definition of "first", "symmetrical", etc. can explicitly or implicitly include one or more of these features; similarly, when the number of certain features is not limited in the form of words such as "two" or "three", it should be noted that this feature also explicitly or implicitly includes one or more feature quantities.

[0030] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0031] like Figure 1-5 As shown, the embodiment of the utility model provides a stable ladder for screw maintenance, including a ladder assembly 1 and an expansion mechanism 2. The ladder assembly 1 includes a base 101, two vertical rods 102 and a plurality of horizontal rods 103;

[0032] Among them, two vertical poles 102 are arranged above the base 101, a plurality of cross bars 103 are fixedly connected between the two vertical poles 102, the expansion mechanism 2 is installed inside the base 101, an anti-slip mechanism 3 is installed on the top of the vertical pole 102, and a support mechanism 4 is installed between the anti-slip mechanism 3 and the cross bar 103;

[0033] The extension mechanism 2 is used to extend both sides of the base 101 to increase the overall stability of the ladder;

[0034] The anti-slip mechanism 3 is used to engage with the lead screw to limit the top of the ladder;

[0035] The support mechanism 4 is used to provide support for the bottom of the anti-slip mechanism 3 so that it can fully fit with the lead screw.

[0036] In one embodiment, the expansion mechanism 2 includes a knob 201, a first screw rod 202, a second screw rod 203, two expansion racks 204, four bases 205 and a slide slot 206;

[0037] The slide groove 206 is provided on the inner wall of the base 101, the two extension frames 204 are slidably connected to the inside of the slide groove 206, the four bases 205 are respectively fixedly connected to the bottom of the two extension frames 204, the first screw rod 202 and the second screw rod 203 are both rotatably connected to the inner wall of the base 101, the adjacent ends of the first screw rod 202 and the second screw rod 203 are fixedly connected, the outer side walls of the first screw rod 202 and the second screw rod 203 are respectively threadedly connected to the inner side walls of the two extension frames 204, and the knob 201 is fixedly connected to one end of the first screw rod 202;

[0038] The first screw rod 202 and the second screw rod 203 are driven to rotate by rotating the knob 201. The rotating first screw rod 202 and the second screw rod 203 respectively push the two extension frames 204 and the four bases 205 out of the base 101 by threads, so that the two sides of the base 101 can be extended by using the extension frames 204 and the bases 205.

[0039] In one embodiment, the anti-slip mechanism 3 includes two connecting seats 301, a connecting shaft 302, two clamps 303, two connecting plates 304, a V-shaped plate 305 and a plurality of convex strips 306;

[0040] The two connecting seats 301 are respectively arranged at the top of one side of the two uprights 102, the two clamps 303 are respectively sleeved on the top of the outer side walls of the two uprights 102, the two clamps 303 are respectively threadedly connected to one side of the two connecting seats 301 by bolts, the connecting shaft 302 is fixedly connected to the other side of the two connecting seats 301, the two connecting plates 304 are fixedly connected to one side of the V-shaped plate 305, the plurality of convex strips 306 are fixedly connected to the other side of the V-shaped plate 305, and the inner side walls of the two connecting plates 304 are rotatably connected to the outer side walls of the connecting shaft 302 through bearings;

[0041] The V-shaped plate 305 can rotate around the connecting shaft 302 by means of the connecting plate 304 , and the connecting seat 301 is fixed to the outer side wall of the vertical pole 102 by means of the clamp 303 .

[0042] In one embodiment, the support mechanism 4 includes a piston sleeve 401, a piston rod 402, a spring 403 and a connecting ring 404;

[0043] Among them, one end of the piston sleeve 401 is rotatably connected to the outer side wall of a cross bar 103 through a bearing, the outer side wall of the piston rod 402 is slidably connected to the inner side wall of the piston sleeve 401, the connecting ring 404 is hinged to the bottom of the inner side wall of the V-shaped plate 305, one end of the piston rod 402 is fixedly connected to the outer side wall of the connecting ring 404, and the spring 403 is fixedly connected between the piston rod 402 and the bottom of the inner side wall of the piston sleeve 401;

[0044] The movable vertical rod 102 uses the piston sleeve 401 and the piston rod 402 to make the bottom of the V-shaped plate 305 contact the surface of the lead screw first, and the piston sleeve 401 and the piston rod 402 can be used to limit the overall inclination angle of the V-shaped plate 305.

[0045] In one embodiment, two connecting members 51 are symmetrically fixedly connected to the upper surface of the base 101, and two connecting blocks 52 are fixedly connected to the bottoms of the two uprights 102. The two connecting blocks 52 are respectively hinged to the inner side walls of the two connecting members 51;

[0046] The connecting block 52 and the connecting member 51 are provided so as to fold or unfold the base 101 and the upright pole 102 .

[0047] When the utility model is in operation, the ladder is placed at a designated position, and then the first screw rod 202 and the second screw rod 203 are driven to rotate by rotating the knob 201. The rotating first screw rod 202 and the second screw rod 203 respectively push two extension frames 204 and four bases 205 out of the base 101 by means of threads, so that the extension frames 204 and the bases 205 can be used to extend the two sides of the base 101, thereby improving the anti-rollover performance of the ladder and the stability of the bottom.

[0048] When the expansion rack 204 is adjusted, the piston sleeve 401 and the piston rod 402 are used to make the bottom of the V-shaped plate 305 contact the surface of the screw first by moving the vertical rod 102, and then the pressure V-shaped plate 305 is used to drive the piston rod 402 to move. The moving piston rod 402 drives the spring 403 to be compressed so that the V-shaped plate 305 can be fully fitted with the surface of the screw, and the piston sleeve 401 can be used to cooperate with the piston rod 402 to limit the overall inclination angle of the V-shaped plate 305, and then the convex strip 306 is used to be inserted into the thread on the surface of the screw to engage the V-shaped plate 305 and prevent the ladder from sliding down during climbing, thereby completing the ladder placement operation.

[0049] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A stable ladder for screw maintenance, comprising a ladder assembly (1) and an expansion mechanism (2), characterized in that: The ladder assembly (1) comprises a base (101), two vertical rods (102) and a plurality of horizontal rods (103); The two vertical poles (102) are both arranged above the base (101), the plurality of horizontal poles (103) are both fixedly connected between the two vertical poles (102), the expansion mechanism (2) is installed inside the base (101), an anti-slip mechanism (3) is installed on the top of the vertical pole (102), and a support mechanism (4) is installed between the anti-slip mechanism (3) and the horizontal pole (103); Wherein, the extension mechanism (2) is used to extend both sides of the base (101) to increase the overall stability of the ladder; Wherein, the anti-slip mechanism (3) is used to engage with the lead screw to limit the top of the ladder; The support mechanism (4) is used to provide support for the bottom of the anti-slip mechanism (3) so that it is fully fitted with the lead screw.

2. The stable ladder for screw maintenance according to claim 1, characterized in that: The expansion mechanism (2) comprises a knob (201), a first screw rod (202), a second screw rod (203), two expansion racks (204), four bases (205) and a slide groove (206); The slide groove (206) is provided on the inner wall of the base (101), the two expansion racks (204) are slidably connected to the inside of the slide groove (206), and the four bases (205) are respectively fixedly connected to the bottom of the two expansion racks (204).

3. The stable ladder for screw maintenance according to claim 2, characterized in that: The first screw rod (202) and the second screw rod (203) are both rotatably connected to the inner wall of the base (101); the adjacent ends of the first screw rod (202) and the second screw rod (203) are fixedly connected; the outer walls of the first screw rod (202) and the second screw rod (203) are respectively threadedly connected to the inner walls of the two expansion frames (204); and the knob (201) is fixedly connected to one end of the first screw rod (202).

4. The stable ladder for screw maintenance according to claim 1, characterized in that: The anti-slip mechanism (3) comprises two connecting seats (301), a connecting shaft (302), two clamps (303), two connecting plates (304), a V-shaped plate (305) and a plurality of convex strips (306); The two connecting seats (301) are respectively arranged at the top of one side of the two vertical poles (102), the two clamps (303) are respectively sleeved on the top of the outer side walls of the two vertical poles (102), the two clamps (303) are respectively threadedly connected to one side of the two connecting seats (301) by bolts, and the connecting shaft (302) is fixedly connected to the other side of the two connecting seats (301).

5. The stable ladder for screw maintenance according to claim 4, characterized in that: The two connecting plates (304) are fixedly connected to one side of the V-shaped plate (305), the plurality of convex strips (306) are fixedly connected to the other side of the V-shaped plate (305), and the inner side walls of the two connecting plates (304) are rotatably connected to the outer side wall of the connecting shaft (302) via bearings.

6. The stable ladder for screw maintenance according to claim 4, characterized in that: The support mechanism (4) comprises a piston sleeve (401), a piston rod (402), a spring (403) and a connecting ring (404); One end of the piston sleeve (401) is rotatably connected to the outer wall of one of the cross bars (103) via a bearing, the outer wall of the piston rod (402) is slidably connected to the inner wall of the piston sleeve (401), the connecting ring (404) is hinged to the bottom of the inner wall of the V-shaped plate (305), one end of the piston rod (402) is fixedly connected to the outer wall of the connecting ring (404), and the spring (403) is fixedly connected between the piston rod (402) and the bottom of the inner wall of the piston sleeve (401).

7. The stable ladder for screw maintenance according to claim 1, characterized in that: Two connecting members (51) are symmetrically fixedly connected to the upper surface of the base (101), and two connecting blocks (52) are fixedly connected to the bottoms of the two upright poles (102), and the two connecting blocks (52) are respectively hinged to the inner side walls of the two connecting members (51).

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