Double-column lifting machine compatible with two heights

Abstract

The invention aims to disclose a double-column lifting machine compatible with two heights, and relates to the technical field of vehicle lifting, the double-column lifting machine comprises a first column, a first sliding table, a second column and a second sliding table; the first sliding table is provided with a first pull rope hole, a second pull rope hole and a third pull rope hole, the first pull rope hole and the second pull rope hole are formed in the top of the first sliding table side by side, and the third pull rope hole is formed in the inner wall of the first sliding table and located under the first pull rope hole. The height H between the third pull rope hole and the first pull rope hole is equal to M-L; the technical effects are as follows: two mounting positions are designed on the upright post, three pull rope holes are designed on the sliding table of each upright post, and the first steel wire rope and the second steel wire rope can be compatible with two lifting heights under the condition that the steel wire ropes are not detached and replaced by adjusting the connecting positions and directions of the end parts of the first steel wire rope and the second steel wire rope and the stretching holes; two sets of steel wire ropes do not need to be provided any more, cost is saved, and switching efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle lifting, and in particular to a double-column lift compatible with two heights. Background Art

[0002] Two-post lifts are designed to different heights according to the site conditions. At present, in order to adapt to different site heights, users need to be equipped with two sets of steel wire ropes of different lengths so that users can choose different installation heights according to actual conditions. The disadvantage is that it is more troublesome for users to install, and purchasing two sets of steel wire ropes also increases costs.

[0003] In view of this, it is necessary to develop a two-post lift that is compatible with two heights to overcome the above-mentioned defects. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to disclose a two-post lift that is compatible with two heights.

[0005] To achieve the above-mentioned purpose of the invention, the present invention provides a two-post lift compatible with two heights, comprising a first post, a first slide, a second post and a second slide;

[0006] The first column comprises a first inner column and a first outer column mounted on the first inner column, and the first inner column and the first outer column are provided with a first installation position and a second installation position;

[0007] The second column comprises a second inner column and a second outer column sleeved on the second inner column, and the second inner column and the second outer column are provided with a third installation position and a fourth installation position;

[0008] When the first outer column and the first inner column are installed at the first installation position, and the second outer column and the second inner column are installed at the third installation position, the height of the lift is L;

[0009] When the first outer column and the first inner column are installed at the second installation position, and the second outer column and the second inner column are installed at the fourth installation position, the height of the lift is M;

[0010] The first slide is provided with a first rope-drawing hole, a second rope-drawing hole and a third rope-drawing hole. The first rope-drawing hole and the second rope-drawing hole are arranged side by side on the top of the first slide, and the third rope-drawing hole is arranged on the inner wall of the first slide and is located directly below the first rope-drawing hole. The height H between the third rope-drawing hole and the first rope-drawing hole is ML.

[0011] The second slide platform is provided with a fourth rope pull hole, a fifth rope pull hole and a sixth rope pull hole. The fourth rope pull hole and the fifth rope pull hole are arranged side by side on the top of the second slide platform, and the sixth rope pull hole is arranged on the inner wall of the second slide platform and is located directly below the fourth rope pull hole. The height H between the sixth rope pull hole and the fourth rope pull hole is ML.

[0012] Preferably, a first pulley is installed at the bottom of the first inner column, and a second pulley is installed at the bottom of the second inner column;

[0013] A third pulley and a fourth pulley are arranged side by side on the top of the first outer column;

[0014] The fifth pulley and the sixth pulley are arranged side by side on the top of the second outer column.

[0015] Preferably, the first outer column and the first inner column are installed at the first installation position, and the second outer column and the second inner column are installed at the third installation position;

[0016] The first end of the first steel wire rope is installed in the second rope hole, the first steel wire rope passes downward through the first pulley, bends upward, and then passes through the fourth pulley and the sixth pulley in sequence, and the second end of the first steel wire rope passes through the fourth rope hole and is installed in the sixth rope hole;

[0017] The first end of the second steel wire rope is installed in the third rope hole, the second steel wire rope passes through the first rope hole upward, and passes through the third pulley, the fifth pulley and the second pulley in sequence, and the second end of the second steel wire rope is installed in the fifth rope hole in an upward manner;

[0018] The height distance H between the first end of the second steel wire rope and the first end of the first steel wire rope 1 =-(ML).

[0019] Preferably, the first outer column and the first inner column are installed at the second installation position, and the second outer column and the second inner column are installed at the fourth installation position;

[0020] The first end of the first steel wire rope is installed in the third rope-drawing hole, the first steel wire rope passes downward through the first pulley, then bends upward and passes through the fourth pulley and the sixth pulley in sequence, and the second end of the first steel wire rope is installed in the fourth rope-drawing hole;

[0021] The first end of the second steel wire rope is installed in the first rope hole and passes through the third pulley, the fifth pulley and the second pulley in sequence, and the second end of the second steel wire rope is installed in the sixth rope hole in an upward manner;

[0022] The height distance H between the first end of the second steel wire rope and the first end of the first steel wire rope 2=ML.

[0023] Preferably, M is 3800mm-4200mm, and L is 3400mm-3600mm.

[0024] Preferably, the third rope-pulling hole and the sixth rope-pulling hole can both withstand vertical upward pulling force and vertical downward pulling force.

[0025] Preferably, the third rope-pulling hole is located on a rope-pulling base, and the rope-pulling base includes a horizontal plate and a vertical plate, and the third rope-pulling hole is arranged on the horizontal plate;

[0026] A first mortise and tenon structure is provided between the horizontal plate and the vertical plate, and a second mortise and tenon structure is provided between the horizontal plate and the first slide platform;

[0027] The vertical plate is welded to the inner wall of the first slide;

[0028] The horizontal plate is welded to the inner wall of the first slide;

[0029] The horizontal plate is welded to the vertical plate.

[0030] Preferably, a first rectangular protrusion is provided on the first side of the horizontal plate, and a second rectangular protrusion is provided on the second side of the horizontal plate;

[0031] The first rectangular protrusion is inserted into the vertical plate, and the second rectangular protrusion is inserted into the inner wall of the first slide table.

[0032] Preferably, a first fixing plate is arranged on the top of the first slide, the first rope-drawing hole and the second rope-drawing hole are arranged on the first fixing plate, a first rope-drawing avoidance position is arranged on the first fixing plate, and the first rope-drawing avoidance position is arranged on one side of the second rope-drawing hole;

[0033] A second fixing plate is arranged on the top of the second slide, the fourth rope pulling hole and the fifth rope pulling hole are arranged on the second fixing plate, a second rope pulling avoidance position is arranged on the second fixing plate, and the second rope pulling avoidance position is arranged on one side of the fifth rope pulling hole.

[0034] Preferably, the first rope-drawing hole and the fourth rope-drawing hole are both round holes, and the second rope-drawing hole and the fifth rope-drawing hole are both waist-shaped holes.

[0035] Compared with the prior art, the technical effects of the present invention are as follows:

[0036] The column of the double-column lift of the present invention is designed with two installation positions, which can be compatible with two lifting heights. At the same time and inseparably, three rope pulling holes are designed on the slide of each column. By adjusting the connection position and direction of the ends of the first steel wire rope and the second steel wire rope with the stretching holes, the first steel wire rope and the second steel wire rope can also be compatible with the two lifting heights without removing the steel wire ropes. Through the present invention, the user only needs to adjust the installation position of the column and change the connection position and direction of the end of the steel wire rope to switch between two different lifting heights. There is no need to provide two sets of steel wire ropes, which saves costs. At the same time, the operation of switching heights is simpler and the switching efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a schematic diagram of the connection between the first steel wire rope and the second steel wire rope when the height of the lift of the present invention is L.

[0039] Figure 2 It is a schematic diagram of the connection between the first steel wire rope and the second steel wire rope when the height of the lift of the present invention is M.

[0040] Figure 3 It is a schematic diagram of the three-dimensional structure of the first slide of the present invention.

[0041] Figure 4 It is a schematic diagram of the three-dimensional structure of the first slide of the present invention.

[0042] Figure 5 It is a schematic diagram of the three-dimensional structure of the first slide or the second slide of the present invention.

[0043] Figure 6 It is a schematic diagram of the three-dimensional structure of the pull rope base of the present invention.

[0044] Figure 7 It is a schematic diagram of the three-dimensional structure of the column when the height of the lift of the present invention is L.

[0045] Figure 8 It is a schematic diagram of the three-dimensional structure of the column when the height of the lift of the present invention is M.

[0046] Among them, 1, the first column; 11, the first inner column; 111, the first installation position; 112, the second installation position; 113, the first pulley; 12, the first outer column; 121, the third pulley; 122, the fourth pulley; 2, the first slide; 21, the first rope hole; 22, the second rope hole; 23, the third rope hole; 24, the first fixing plate; 25, the first rope avoidance position; 3, the second column; 31, the second inner column; 311, the third installation position; 312, the fourth installation position; 313, the second pulley; 32, the second outer column; 321, the fifth pulley; 322 , the sixth pulley; 4, the second slide; 41, the fourth pull rope hole; 42, the fifth pull rope hole; 43, the sixth pull rope hole; 44, the second fixed plate; 45, the second pull rope avoidance position; 5, the first steel wire rope; 51, the first end of the first steel wire rope; 52, the second end of the first steel wire rope; 6, the second steel wire rope; 61, the first end of the second steel wire rope; 62, the second end of the second steel wire rope; 7, the pull rope base; 71, the horizontal plate; 711, the first rectangular protrusion; 712, the second rectangular protrusion; 72, the vertical plate; 73, the first mortise and tenon structure; 74, the second mortise and tenon structure. DETAILED DESCRIPTION

[0047] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0049] Embodiment 1

[0050] Ginseng Figures 1 to 8 , this embodiment discloses a specific implementation of a two-post lift that is compatible with two heights.

[0051] Compatible with two-post lifts of two heights, see Figures 1 to 8, including a first column 1, a first slide 2, a second column 3 and a second slide 4, the first slide 2 slides up and down along the inner wall of the first column 1, and the second slide 4 slides up and down along the inner wall of the second column 3; the first column 1 includes a first inner column 11 and a first outer column 12 sleeved on the first inner column 11, and the first inner column 11 and the first outer column 12 are provided with a first installation position 111 and a second installation position 112; the second column 3 includes a second inner column 31 and a second outer column 32 sleeved on the second inner column 31, and the second inner column 31 and the second outer column 32 are provided with a third installation position 311 and a fourth installation position 312; see Figure 7 and Figure 8 , when the first outer column 12 and the first inner column 11 are installed at the first installation position 111, and the second outer column 32 and the second inner column 31 are installed at the third installation position 311, the height of the lift is L; when the first outer column 12 and the first inner column 11 are installed at the second installation position 112, and the second outer column 32 and the second inner column 31 are installed at the fourth installation position 312, the height of the lift is M. In a preferred embodiment, M is 3800mm-4200mm, and L is 3400mm-3600mm; the first slide 2 is provided with a first rope hole 21, a second rope hole 22 and a third rope hole 23, and the first rope hole 21 The third rope hole 23 is arranged on the inner wall of the first slide 2 and is directly below the first rope hole 21, and the height H between the third rope hole 23 and the first rope hole 21 is ML; the fourth rope hole 41, the fifth rope hole 42 and the sixth rope hole 43 are arranged on the second slide 4, and the fourth rope hole 41 and the fifth rope hole 42 are arranged side by side on the top of the second slide 4, and the sixth rope hole 43 is arranged on the inner wall of the second slide 4 and is directly below the fourth rope hole 41, and the height H between the sixth rope hole 43 and the fourth rope hole 41 is ML.

[0052] See also Figure 1 and Figure 2 In order to make the first slide 2 and the second slide 4 rise and fall synchronously, a first pulley 113 is installed at the bottom of the first inner column 11, and a second pulley 313 is installed at the bottom of the second inner column 31; a third pulley 121 and a fourth pulley 122 are arranged side by side on the top of the first outer column 12; a fifth pulley 321 and a sixth pulley 322 are arranged side by side on the top of the second outer column 32; see Figure 7 , when the first outer column 12 and the first inner column 11 are installed at the first installation position 111, and the second outer column 32 and the second inner column 31 are installed at the third installation position 311, refer to Figure 1, the first end 51 of the first steel wire rope is installed in the second rope hole 22, the first steel wire rope 5 passes downward through the first pulley 113, then bends upward and passes through the fourth pulley 122 and the sixth pulley 322 in sequence, the second end 52 of the first steel wire rope passes through the fourth rope hole 41 and is installed in the sixth rope hole 43; the first end 61 of the second steel wire rope is installed in the third rope hole 23, the second steel wire rope 6 passes upward through the first rope hole 21, and passes through the third pulley 121, the fifth pulley 321 and the second pulley 313 in sequence, and the second end 62 of the second steel wire rope is installed in the fifth rope hole 42 in an upward manner; the height distance H between the first end 61 of the second steel wire rope and the first end 51 of the first steel wire rope 1 =-(ML).

[0053] See also Figure 8 , when the first outer column 12 and the first inner column 11 are installed at the second installation position 112, and the second outer column 32 and the second inner column 31 are installed at the fourth installation position 312; see Figure 2 , the first end 51 of the first steel wire rope is installed in the third rope hole 23, the first steel wire rope passes downward through the first pulley 113, then bends upward and passes through the fourth pulley 122 and the sixth pulley 322 in sequence, and the second end 52 of the first steel wire rope is installed in the fourth rope hole 41; the first end 61 of the second steel wire rope is installed in the first rope hole 21, and passes through the third pulley 121, the fifth pulley 321 and the second pulley 313 in sequence, and the second end 62 of the second steel wire rope is installed in the sixth rope hole 43 in an upward manner; the height distance H between the first end 61 of the second steel wire rope and the first end 51 of the first steel wire rope 2 =ML.

[0054] Depend on Figure 1 The status changes to Figure 2 In this state, the first end 61 of the second steel wire rope is equivalent to a rise of height H, while the first end 51 of the first steel wire rope is equivalent to a fall of height H, the second end 62 of the second steel wire rope is equivalent to a fall of height H, and the second end 52 of the first steel wire rope is equivalent to a rise of height H, so that the first slide 2 and the second slide 4 are equivalent to consuming 2H length of steel wire rope respectively, achieving a lifting height of more than H.

[0055] See also Figures 3 to 5A first fixing plate 24 is provided on the top of the first slide 2, the first rope hole 21 and the second rope hole 22 are provided on the first fixing plate 24, a first rope avoidance position 25 is provided on the first fixing plate 24, and the first rope avoidance position 25 is provided on one side of the second rope hole 22; a second fixing plate 44 is provided on the top of the second slide 4, the fourth rope hole 41 and the fifth rope hole 42 are provided on the second fixing plate 44, a second rope avoidance position 45 is provided on the second fixing plate 44, and the second rope avoidance position 45 is provided on one side of the fifth rope hole 42; see Figure 1 and Figure 2 The first pull rope avoidance position 25 provides a avoidance space for the first steel wire rope 5 so that the first steel wire rope 5 can pass smoothly; the second pull rope avoidance position 45 provides a avoidance space for the second steel wire rope 6 so that the second steel wire rope 6 can pass smoothly; the first pull rope hole 21 and the fourth pull rope hole 41 are both round holes, and the second pull rope hole 22 and the fifth pull rope hole 42 are both waist-shaped holes, see Figures 1 to 5 When the height of the lift is switched, the first end 51 of the first steel wire rope is installed in the second rope hole 22 or the third rope hole 23. In the height direction, the second rope hole 22 and the third rope hole 23 are not on a vertical line, which causes the first end 51 of the first steel wire rope to be installed in the third rope hole 23 in a vertical manner, or to be installed in the second rope hole 22 in an oblique manner. For this reason, the second rope hole 22 is designed as a waist-shaped hole to facilitate the oblique pulling of the first steel wire rope 5; similarly, the second end 62 of the second steel wire rope is installed in the sixth rope hole 43 in a vertical manner, or the second end 62 of the second steel wire rope is installed in the fifth rope hole 42 in an oblique manner. For this reason, the fifth rope hole 42 is designed as a waist-shaped hole to facilitate the oblique pulling of the second steel wire rope 6.

[0056] See also Figure 1 and Figure 2In the process of switching the height of the lift, in view of the change in the rope positions of the first steel wire rope 5 and the second steel wire rope 6, the third rope hole 23 and the sixth rope hole 43 will be subjected to both vertical upward pulling force and vertical downward pulling force. In the process of lifting heavy objects, such as vehicles, the third rope hole 23 and the sixth rope hole 43 are subjected to a large shear force. In order to prevent the third rope hole 23 and the sixth rope hole 43 from being damaged, the third rope hole 23 and the sixth rope hole 43 are respectively located on the rope base 7 installed on the slide, so as to prevent the third rope hole 23 and the sixth rope hole 43 from being damaged. Taking the rope pull base 7 installed on the first slide 2 as an example, the rope pull base 7 includes a horizontal plate 71 and a vertical plate 72, the horizontal plate 71 is provided with the third rope pull hole 23; a first mortise and tenon structure 73 is provided between the horizontal plate 71 and the vertical plate 72, and a second mortise and tenon structure 74 is provided between the horizontal plate 71 and the first slide 2; the vertical plate 72 is welded to the inner wall of the first slide 2; the horizontal plate 71 is welded to the inner wall of the first slide 2; the horizontal plate 71 is welded to the vertical plate 72. Specifically, a first rectangular protrusion 711 is provided on the first side of the horizontal plate 71, and a second rectangular protrusion 712 is provided on the second side of the horizontal plate 71; the first rectangular protrusion 711 is inserted into the vertical plate 72, and the second rectangular protrusion 712 is inserted into the inner wall of the first slide 2; to realize the above structure, when processing the first slide 2 and the vertical plate 72, a rectangular hole matching the second rectangular protrusion 712 is provided on the inner wall of the first slide 2, and a rectangular hole matching the first rectangular protrusion 711 is provided on the vertical plate 72, and the assembly of the rope base 7 is realized according to the following steps: the first step is to insert the first rectangular protrusion 711 of the horizontal plate 71 into the rectangular hole of the vertical plate 72 and weld them to form a first mortise and tenon structure 73 and the horizontal plate 71 and the vertical plate 72 connected by welding, and the two are firmly combined; the second step is to insert the second The rectangular protrusion 712 is inserted into the inner wall of the first slide 2 to form a second mortise and tenon structure 74, and the contact surface between the horizontal plate 71 and the inner wall of the first slide 2 is welded, and the contact surface between the vertical plate 72 and the inner wall of the first slide 2 is welded synchronously to form a firm rope base 7. Since the vertical plate 72 is welded to the inner wall of the first slide 2 in a vertical state, and under the joint action of the first mortise and tenon structure 73 and the second mortise and tenon structure 74, the rope base 7 can withstand both a large vertical upward pulling force and a large vertical downward pulling force. When lifting heavy objects, such as vehicles, the third rope hole 23 is subjected to a large shear force. Through the rope base 7 of this embodiment, the third rope hole 23 and the rope base 7 are effectively prevented from being damaged. Similarly, the rope base 7 arranged on the second slide 4 has the same structural principle as the rope base 7 arranged on the first slide 2, which will not be repeated.

[0057] The present embodiment includes at least the following inseparable technical means, so that the two-post lift can be safely and reliably compatible with two heights: (1) The columns of the two-post lift of the present embodiment are designed with two installation positions, which can be compatible with two lifting heights; (2) Three rope pulling holes are designed on the slide of each column. By adjusting the connection position and direction of the ends of the first steel wire rope and the second steel wire rope with the stretching holes, the first steel wire rope and the second steel wire rope can also be compatible with two lifting heights without replacing the steel wire ropes; (3) The rope pulling base 7 is designed with a first mortise and tenon structure 73, a second mortise and tenon structure 74 and a welding structure, and combined with the vertical installation of the vertical plate 72, the rope pulling base 7 can withstand both a large vertical upward pulling force and a large vertical downward pulling force. In the process of lifting heavy objects, such as vehicles, the third rope pulling hole 23, the sixth rope pulling hole 43 and the rope pulling base 7 are effectively prevented from being damaged, which is safe and reliable.

Claims

1. Compatible with two-post lifts of two heights, characterized by: It includes a first column, a first slide, a second column and a second slide; The first column comprises a first inner column and a first outer column mounted on the first inner column, and the first inner column and the first outer column are provided with a first installation position and a second installation position; The second column comprises a second inner column and a second outer column sleeved on the second inner column, and the second inner column and the second outer column are provided with a third installation position and a fourth installation position; When the first outer column and the first inner column are installed at the first installation position, and the second outer column and the second inner column are installed at the third installation position, the height of the lift is L; When the first outer column and the first inner column are installed at the second installation position, and the second outer column and the second inner column are installed at the fourth installation position, the height of the lift is M; The first slide is provided with a first rope-drawing hole, a second rope-drawing hole and a third rope-drawing hole. The first rope-drawing hole and the second rope-drawing hole are arranged side by side on the top of the first slide, and the third rope-drawing hole is arranged on the inner wall of the first slide and is located directly below the first rope-drawing hole. The height H between the third rope-drawing hole and the first rope-drawing hole is ML. The second slide platform is provided with a fourth rope pull hole, a fifth rope pull hole and a sixth rope pull hole. The fourth rope pull hole and the fifth rope pull hole are arranged side by side on the top of the second slide platform, and the sixth rope pull hole is arranged on the inner wall of the second slide platform and is located directly below the fourth rope pull hole. The height H between the sixth rope pull hole and the fourth rope pull hole is ML.

2. The two-post lift compatible with two heights as claimed in claim 1, characterized in that: A first pulley is installed at the bottom of the first inner column, and a second pulley is installed at the bottom of the second inner column; A third pulley and a fourth pulley are arranged side by side on the top of the first outer column; The fifth pulley and the sixth pulley are arranged side by side on the top of the second outer column.

3. The two-post lift compatible with two heights as claimed in claim 2, characterized in that: When the first outer column and the first inner column are installed at the first installation position, and the second outer column and the second inner column are installed at the third installation position; The first end of the first steel wire rope is installed in the second rope hole, the first steel wire rope passes downward through the first pulley, bends upward, and then passes through the fourth pulley and the sixth pulley in sequence, and the second end of the first steel wire rope passes through the fourth rope hole and is installed in the sixth rope hole; The first end of the second steel wire rope is installed in the third rope hole, the second steel wire rope passes through the first rope hole upward, and passes through the third pulley, the fifth pulley and the second pulley in sequence, and the second end of the second steel wire rope is installed in the fifth rope hole in an upward manner; A height distance H1 between the first end of the second steel rope and the first end of the first steel rope = -(ML).

4. The two-post lift compatible with two heights as claimed in claim 2, characterized in that: When the first outer column and the first inner column are installed at the second installation position, and the second outer column and the second inner column are installed at the fourth installation position; The first end of the first steel wire rope is installed in the third rope-drawing hole, the first steel wire rope passes downward through the first pulley, then bends upward and passes through the fourth pulley and the sixth pulley in sequence, and the second end of the first steel wire rope is installed in the fourth rope-drawing hole; The first end of the second steel wire rope is installed in the first rope hole and passes through the third pulley, the fifth pulley and the second pulley in sequence, and the second end of the second steel wire rope is installed in the sixth rope hole in an upward manner; The height distance H2=ML between the first end of the second steel wire rope and the first end of the first steel wire rope.

5. The two-post lift compatible with two heights as claimed in any one of claims 1 to 4, characterized in that: M is 3800mm-4200mm, L is 3400mm-3600mm.

6. The two-post lift compatible with two heights as claimed in claim 5, characterized in that: The third rope-pulling hole and the sixth rope-pulling hole can both withstand vertical upward pulling force and vertical downward pulling force.

7. The two-post lift compatible with two heights as claimed in claim 6, characterized in that: The third rope-pulling hole is located on a rope-pulling base, and the rope-pulling base includes a horizontal plate and a vertical plate, and the third rope-pulling hole is arranged on the horizontal plate; A first mortise and tenon structure is provided between the horizontal plate and the vertical plate, and a second mortise and tenon structure is provided between the horizontal plate and the first slide platform; The vertical plate is welded to the inner wall of the first slide; The horizontal plate is welded to the inner wall of the first slide; The horizontal plate is welded to the vertical plate.

8. The two-post lift compatible with two heights as claimed in claim 7, characterized in that: A first rectangular protrusion is provided on a first side of the horizontal plate, and a second rectangular protrusion is provided on a second side of the horizontal plate; The first rectangular protrusion is inserted into the vertical plate, and the second rectangular protrusion is inserted into the inner wall of the first slide table.

9. The two-post lift compatible with two heights as claimed in claim 5, characterized in that: A first fixing plate is arranged on the top of the first slide, the first rope-drawing hole and the second rope-drawing hole are arranged on the first fixing plate, a first rope-drawing avoidance position is arranged on the first fixing plate, and the first rope-drawing avoidance position is arranged on one side of the second rope-drawing hole; A second fixing plate is arranged on the top of the second slide, the fourth rope pulling hole and the fifth rope pulling hole are arranged on the second fixing plate, a second rope pulling avoidance position is arranged on the second fixing plate, and the second rope pulling avoidance position is arranged on one side of the fifth rope pulling hole.

10. The two-post lift compatible with two heights as claimed in claim 9, characterized in that: The first rope-drawing hole and the fourth rope-drawing hole are both round holes, and the second rope-drawing hole and the fifth rope-drawing hole are both waist-shaped holes.

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