Lifting equipment and lifting machine

Abstract

The invention aims at disclosing lifting equipment and a lifting machine, and relates to the technical field of lifting machines, the lifting equipment comprises a stand column, a sliding table and a lifting part; the sliding table is arranged in the stand column, the lifting part is arranged on the sliding table, and the sliding table ascends and descends along the stand column; the sliding table comprises a first side wall and a second side wall, a first sliding assembly is installed on the lower middle portion of the first side wall, and a second sliding assembly is installed on the lower middle portion of the second side wall. A first vertical track is arranged on the first side wall, and a second vertical track is arranged on the second side wall; a first supporting plate is mounted on the first L-shaped bending part; a second supporting plate is mounted on the second L-shaped bending part; the sliding table has the technical effects that in the lifting process of the sliding table, the first sliding assembly and the second sliding assembly ascend and descend and support the left side, the right side, the front side and the rear side of the sliding table; the first vertical rail abuts against the first supporting plate to ascend and descend, and the second vertical rail abuts against the second supporting plate to ascend and descend, so that the sliding table is supported in the front-back direction and the left-right direction.

Description

Technical Field

[0001] The present invention relates to the technical field of lifts, and in particular to a lifting device and a lift. Background Art

[0002] At present, the lift includes a slide and a column. How to ensure the smooth lifting of the slide is one of the technical problems that need to be overcome.

[0003] In view of this, it is necessary to develop a lifting device and a lifting machine. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to disclose a lifting device and a lifting machine.

[0005] The first object of the present invention is to provide a lifting device.

[0006] A second object of the present invention is to provide a lifting machine.

[0007] To achieve the above first invention objective, the present invention provides a lifting device, including a column, a slide and a lifting part;

[0008] The slide is arranged in the column, the lifting part is arranged on the slide, and the slide is lifted and lowered along the column;

[0009] The slide platform comprises a first side wall and a second side wall, a first sliding assembly is installed at the middle and lower part of the first side wall, and a second sliding assembly is installed at the middle and lower part of the second side wall;

[0010] A first vertical track is arranged on the first side wall, and a second vertical track is arranged on the second side wall;

[0011] The column includes a first bending plate and a second bending plate, the first bending plate includes a first U-shaped bending portion and a first L-shaped bending portion, and the second bending plate includes a second U-shaped bending portion and a second L-shaped bending portion;

[0012] A first support plate is installed on the first L-shaped bending portion, wherein the first support plate abuts against the first vertical track;

[0013] A second support plate is installed on the second L-shaped bent portion, wherein the second support plate abuts against the second vertical track;

[0014] The first sliding component contacts the first U-shaped bending portion during the lifting process;

[0015] The second sliding component contacts the second U-shaped bending portion during the lifting process.

[0016] Preferably, the first sliding assembly includes a first sliding block and a second sliding block, the first sliding block is arranged at the bottom or close to the bottom of the first side wall, the second sliding block is arranged above the first sliding block, and the distance between the first sliding block and the second sliding block is less than 0.5×H, where H is the height of the slide table;

[0017] The second sliding assembly includes a third slider and a fourth slider, the third slider is arranged at the bottom or near the bottom of the second side wall, the fourth slider is arranged above the third slider, and the distance between the third slider and the fourth slider is less than 0.5×H, where H is the height of the slide.

[0018] Preferably, the distance between the center point of the first support plate and the horizontal plane is 0.7×H;

[0019] The distance between the center point of the second supporting plate and the horizontal plane is 0.7×H.

[0020] Preferably, the first sliding assembly comprises a first sliding block, and the first sliding block is arranged at the bottom of the first side wall or close to the bottom;

[0021] The second sliding assembly includes a third sliding block, and the third sliding block is arranged at the bottom of the second side wall or close to the bottom.

[0022] Preferably, the first support plate is installed at or near the top of the first L-shaped bending portion;

[0023] The second supporting plate is installed at or near the top of the second L-shaped bending portion.

[0024] Preferably, during the lifting process of the slide, the first vertical track always abuts against the first support plate, and the second vertical track always abuts against the second support plate.

[0025] Preferably, a reinforcing plate is arranged around the upright column, a first vertical plate and a second vertical plate are arranged on the front side of the reinforcing plate, a first protrusion is arranged on the first vertical plate, and the first protrusion abuts against the end of the first supporting plate;

[0026] A second protrusion is provided on the second vertical plate, and the second protrusion abuts against the end of the second supporting plate.

[0027] Preferably, the friction coefficient between the first sliding component and the first U-shaped bending portion is 0.16-0.25, the friction coefficient between the second sliding component and the second U-shaped bending portion is 0.16-0.25, and the HR hardness of the surface of the first sliding component and the second sliding component is 75-85;

[0028] The friction coefficient between the first support plate and the first vertical track is 0.16-0.25, the friction coefficient between the second support plate and the second vertical track is 0.16-0.25, and the HR hardness of the surfaces of the first support plate and the second support plate is 75-85.

[0029] Preferably, a first angle plate is provided at the bottom of the first side wall, and a second angle plate is provided at the bottom of the second side wall, and the first angle plate and the second angle plate support the lifting portion;

[0030] A first long strip pad having the same thickness as the first angle plate is arranged above the first angle plate, and the first vertical track is arranged on the surfaces of the first angle plate and the first long strip pad;

[0031] A second long strip pad having the same thickness as the second angle plate is arranged above the second angle plate, and the second vertical track is arranged on the surfaces of the second angle plate and the second long strip pad.

[0032] Based on the same inventive principle, in order to achieve the above-mentioned second inventive object, the present invention provides a lifting machine, which includes at least one lifting device described in the first invention.

[0033] Compared with the prior art, the technical effects of the present invention are as follows:

[0034] During the lifting process of the slide of the present invention, the first side wall of the slide drives the first sliding component to lift and lower along the inner wall of the first U-shaped bending part, and the second side wall of the slide drives the second sliding component to lift and lower along the inner wall of the second U-shaped bending part, so as to realize the support of the left and right sides and the front and back sides of the slide; the first side wall of the slide drives the first vertical rail to lift and lower against the first support plate, and the first support plate presses against the front side and the first side wall of the first vertical rail, so that the slide is supported in the front and back, left and right directions; the second side wall of the slide drives the second vertical rail to lift and lower against the second support plate, and the second support plate presses against the front side and the second side wall of the second vertical rail, so that the slide It is supported at the front, back, left and right; when the slide is at the bottom, the first sliding assembly and the second sliding assembly support the left and right sides and the front and back sides of the lower middle part of the slide, the first support plate and the first vertical rail cooperate, and the second support plate and the second vertical rail cooperate to support the left and right sides and the front and back sides of the upper middle part of the slide, so that the slide can be lifted and lowered smoothly; when the slide is at the highest point, the first sliding assembly and the second sliding assembly support the left and right sides and the front and back sides of the lower middle part of the slide, the first support plate and the first vertical rail cooperate, and the second support plate and the second vertical rail cooperate to support the left and right sides and the front and back sides of the lower middle part of the slide, so that the slide can be lifted and lowered smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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.

[0036] Figure 1 It is a schematic diagram of the three-dimensional structure of the lifting device of the present invention.

[0037] Figure 2 It is a schematic diagram of the three-dimensional structure of the lifting device of the present invention with the slide table raised.

[0038] Figure 3 It is a schematic diagram of the three-dimensional structure of the lifting device of the present invention.

[0039] Figure 4 It is a three-dimensional structural schematic diagram of the lifting device of the present invention with the slide table raised.

[0040] Figure 5 It is a schematic diagram of the three-dimensional structure of the lifting device of the present invention with the slide table raised.

[0041] Figure 6 It is a three-dimensional structural schematic diagram of the lifting device of the present invention with the slide table raised.

[0042] Figure 7 It is a top view schematic diagram of the matching state of the column and the reinforcing plate of the present invention.

[0043] Figure 8 It is a schematic diagram of the three-dimensional structure of the column and the reinforcing plate of the present invention.

[0044] Fig. 9 It is a schematic diagram of the three-dimensional structure of the column and the reinforcing plate of the present invention.

[0045] Fig.10 It is a schematic diagram of the three-dimensional structure of the lifting device of the second embodiment of the present invention.

[0046] Among them, 1. column; 11. first bending plate; 111. first U-shaped bending part; 112. first L-shaped bending part; 12. second bending plate; 121. second U-shaped bending part; 122. second L-shaped bending part; 2. slide; 21. first side wall; 211. first angle plate; 22. second side wall; 221. second angle plate; 23. first sliding assembly; 231. first slider; 232. first slider; 24. second sliding assembly; 241. third slider; 242. fourth slider; 25. first vertical rail; 26. second vertical rail; 27. first long strip pad; 28. second long strip pad; 3. lifting part; 4. first support plate; 5. second support plate; 6. reinforcement plate; 61. first vertical plate; 611. first protrusion; 62. second vertical plate; 621. second protrusion. 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 9 , this embodiment discloses a specific implementation of a lifting device.

[0051] Lifting equipment, reference Figures 1 to 9 , including a column 1, a slide 2 and a lifting part 3; the slide 2 is arranged in the column 1, the lifting part 3 is arranged on the slide 2, and the slide 2 is raised and lowered along the column 1; for ease of description, see Figure 1, the X-axis represents the left-right direction, the Y-axis represents the front-back direction, the slide 2 includes a first side wall 21 and a second side wall 22, the first side wall 21 is the left side, the second side wall 22 is the right side, a first sliding assembly 23 is installed in the middle and lower part of the first side wall 21, and a second sliding assembly 24 is installed in the middle and lower part of the second side wall 22; a first vertical track 25 is arranged on the first side wall 21, and a second vertical track 26 is arranged on the second side wall 24; the column 1 includes a first bending plate 11 and a second bending plate 12, the first bending plate 11 includes a first U-shaped bending portion 111 and a first L-shaped bending portion 112, and the second bending plate 12 includes a second U-shaped bending portion 121 and a second L-shaped bending portion 122; see Figure 1 The first U-shaped bending portion 111 and the first side wall 21 form a first column groove allowing the first sliding component 23 to pass through, and the second U-shaped bending portion 121 and the second side wall 22 form a second column groove allowing the second sliding component 24 to pass through. The left side wall, front side wall and rear side wall of the first sliding component 23 respectively abut against the three inner wall surfaces of the first U-shaped bending portion 111. The first sliding component 23 contacts the first U-shaped bending portion 111 during the lifting process, and the right side wall, front side wall and rear side wall of the second sliding component 24 respectively abut against the second U-shaped bending portion 121 The second sliding component 24 contacts the second U-shaped bending portion 121 during the lifting process; the first support plate 4 is installed on the first L-shaped bending portion 112, and the first support plate 4 is against the first vertical rail 25. The first vertical rail 25 always presses against the first support plate 4 during the lifting process of the slide 2; the second support plate 5 is installed on the second L-shaped bending portion 122, and the second support plate 5 presses against the second vertical rail 26. The second vertical rail 26 always presses against the second support plate 5 during the lifting process of the slide 2.

[0052] Specifically, see 3 to Figure 5In this embodiment, the first sliding assembly 23 includes a first slider 231 and a second slider 232. The first slider 231 is arranged at the bottom of the first side wall 21 or close to the bottom, and the second slider 232 is arranged above the first slider 231. The distance L between the first slider 231 and the second slider 232 is less than 0.5×H, where H is the height of the slide 2. Symmetrically, the second sliding assembly 24 includes a third slider 241 and a fourth slider 242. The third slider 241 is arranged at the bottom of the second side wall 22 or close to the bottom. The fourth slider 242 is arranged above the third slider 241, and the distance L between the third slider 241 and the fourth slider 242 is less than 0.5×H, where H is the height of the slide; the distance M between the center point of the first support plate 4 and the horizontal plane is 0.7×H; the distance M between the center point of the second support plate 5 and the horizontal plane is 0.7×H; during the lifting process of the slide 2, the first vertical track 25 always abuts against the first support plate 4, and the second vertical track 26 always abuts against the second support plate 26; see Figure 3 , when the slide 2 is in the lowest position, the first slider 231, the second slider 232, the third slider 241 and the fourth slider 242 support the middle and lower part of the slide 2 at the front and rear sides and the left and right sides, and the first support plate 4 and the second support plate 5 support the middle and upper part of the slide 2 at the front and rear sides and the left and right sides, so that the slide 2 is in a stable state. Specifically, taking the moment formed between the first support plate 4, the third slider 241 and the fourth slider 242 as an example, the force F1 and the force F2 applied to the slide 2 form the moment on the left and right sides to ensure the vertical lifting of the slide 2, and the force F3 and the force F4 applied to the slide 2 form the moment on the front and rear sides to ensure the vertical lifting of the slide 2; when the slide 2 is in the ascending process, the first slider 231, the second slider 232, The third slider 241 and the fourth slider 242 continue to rise, and the force F1 and the force F2 applied to the slide 2 gradually approach each other, and the force F3 and the force F4 applied to the slide 2 also gradually approach each other. In this process, the first support plate 4, the second support plate 5, the first slider 231, the second slider 232, the third slider 241 and the fourth slider jointly ensure the vertical lifting of the slide 2; after the first slider 231, the second slider 232, the third slider 241 and the fourth slider exceed the first support plate 4 and the second support plate 5, since the contact area between the slide 2 and the column 1 is also reduced, the first slider 231, the second slider 232, the third slider 241 and the fourth slider can still ensure the smooth lifting of the slide 2.

[0053] See also Figures 7 to 9In order to ensure the supporting strength of the column 1, a reinforcing plate 6 is arranged around and close to the column 1, and a first vertical plate 61 and a second vertical plate 62 are arranged on the front side of the reinforcing plate 6. The first vertical plate 61 and the first L-shaped bending portion 112 form a reinforcing rib with a rectangular cross-section, and the second vertical plate 62 and the second L-shaped bending portion 122 form a reinforcing rib with a rectangular cross-section. A first protruding portion 611 is arranged on the first vertical plate 61, and the first protruding portion 611 abuts against the end of the first supporting plate 4, thereby ensuring the supporting strength of the first supporting plate 4 against the first vertical rail 25; a second protruding portion 621 is arranged on the second vertical plate 62, and the second protruding portion 621 abuts against the end of the second supporting plate 5, thereby ensuring the supporting strength of the second supporting plate 5 against the second vertical rail 26.

[0054] To ensure the smooth lifting and lowering of the slide 2, the first sliding component 23, the second sliding component 24, the first support plate 4, the first vertical rail 25, the second support plate 5 and the second vertical rail 26 are all made of materials that meet certain lubrication coefficients and surface hardnesses. Specifically, the friction coefficient between the first sliding component 23 and the first U-shaped bending portion 111 is 0.16-0.25, the friction coefficient between the second sliding component 24 and the second U-shaped bending portion 121 is 0.16-0.25, and the HR hardness of the surface of the first sliding component 23 and the second sliding component 24 is 75-85; the friction coefficient between the first support plate 4 and the first vertical rail 25 is 0.16-0.25, the friction coefficient between the second support plate 5 and the second vertical rail 26 is 0.16-0.25, the HR hardness of the surface of the first support plate 4 and the second support plate 5 is 75-85, and the HR hardness of the surface of the first vertical rail 25 and the second vertical rail 26 is 75-85.

[0055] See also Figure 3 and Figure 4 A first angle plate 211 is arranged at the bottom of the first side wall 21, and a second angle plate 221 is arranged at the bottom of the second side wall 22, and the first angle plate 211 and the second angle plate 221 support the lifting part 3; a first long strip pad 27 with the same thickness as the first angle plate 211 is arranged above the first angle plate 211, and the first vertical rail 25 is arranged on the surfaces of the first angle plate 211 and the first long strip pad 27, and the first long strip pad 27 and the first angle plate 211 provide a flush support surface for the first vertical rail 25; a second long strip pad 28 with the same thickness as the second angle plate 221 is arranged above the second angle plate 221, and the second vertical rail 26 is arranged on the surfaces of the second angle plate 221 and the second long strip pad 28, and the second long strip pad 28 and the second angle plate 221 provide a flush support surface for the second vertical rail 26.

[0056] In this embodiment, see Figures 2 to 4 There is a large gap between the first vertical plate 61 and the second vertical plate 62, through which the wear of the first support plate 4 and the second support plate 5 can be observed, and the worn first support plate 4 and the second support plate 5 can be replaced at any time through the gap. When the first slider 231, the second slider 232, the third slider 241 and the fourth slider 242 are actually installed, due to manufacturing size errors, installation size errors, etc., it is difficult for the first slider 231, the second slider 232, the third slider 241 and the fourth slider 242 to achieve an ideal design state. For this reason, the wear of the first slider 231, the second slider 232, the third slider 241 and the fourth slider 242 will be inconsistent. In this case, in order to support the slide 2, the first support plate 4 and the second support plate 5 need to wear more to compensate for the first slider 231 , the second slider 232, the third slider 241 and the fourth slider 242; if it is observed from the gap between the first vertical plate 61 and the second vertical plate 62 that the first support plate 4 and the second support plate 5 are seriously worn, then it can be indirectly proved that the first slider 231, the second slider 232, the third slider 241 and the fourth slider 242 are worn and are also seriously worn. Therefore, the visualization of the installation position of the first support plate 4 and the second support plate 5 can play a role in supervising the wear of the first slider 231, the second slider 232, the third slider 241 and the fourth slider 242.

[0057] Embodiment 2

[0058] The difference from Example 1 is that, see Fig.10 The first sliding assembly 23 includes a first slider 231, which is arranged at the bottom or near the bottom of the first side wall 21; the second sliding assembly 24 includes a third slider 241, which is arranged at the bottom or near the bottom of the second side wall 22; the first support plate 4 is installed at the top or near the top of the first L-shaped bending portion 112; the second support plate 5 is installed at the top or near the top of the second L-shaped bending portion 122; during the lifting process of the slide 2, the first vertical rail 25 always presses against the first support plate 4, and the second vertical rail 26 always presses against the second support plate 5.

[0059] In this embodiment, see Fig.10, when the slide 2 is in the lowest position, the first slider 231 and the third slider 241 support the bottom or near the bottom position of the slide 2 at the front and rear sides and the left and right sides, and the first support plate 4 and the second support plate 5 support the top or near the top of the slide 2 at the front and rear sides and the left and right sides, so that the slide 2 is in a stable state. Specifically, taking the torque formed between the first support plate 4 and the third slider 241 as an example, the force F5 and the force F6 applied to the slide 2 form the torque on the left and right sides to ensure the vertical lifting of the slide 2, and the force F7 and the force F8 applied to the slide 2 form the torque on the front and rear sides to ensure the vertical lifting of the slide 2; when the slide 2 is in the rising process, the first slider 231 and the third slider 241 continue to rise, the force F5 and the force F6 applied to the slide 2 gradually approach, and the force F7 and the force F8 applied to the slide 2 also gradually approach. In this process, the first support plate 4, the second support plate 5, the first slider 231, and the third slider 241 jointly ensure the vertical lifting of the slide 2. In this embodiment, the wear conditions of the first support plate 4 and the second support plate 5 can also indirectly reflect the wear conditions of the first slider 231 and the third slider 241 . The first support plate 4 and the second support plate 5 have the advantages of being visualized and easy to replace.

[0060] The lifting equipment disclosed in this embodiment has the same technical solutions as those in the first embodiment. Please refer to the first embodiment and will not be described in detail here.

[0061] Embodiment 3

[0062] This embodiment discloses a specific implementation of a lifting machine.

[0063] A lift includes at least one lifting device according to Embodiment 1 or Embodiment 2. Specifically, a single lifting device according to Embodiment 1 or Embodiment 2 can be used to lift heavy loads such as engines; two lifting devices according to Embodiment 1 or Embodiment 2 can form a two-post lift, which is convenient for lifting loads such as vehicles; four lifting devices according to Embodiment 1 or Embodiment 2 can form a four-post lift, and the lifting part of each lifting device lifts a tire of a vehicle, which is convenient for lifting loads such as vehicles. By adopting the lifting equipment described in Example 1 or Example 2, the column of the lift can, on the one hand, ensure the smooth lifting and lowering of its slide; on the other hand, the wear of the first support plate 4 and the second support plate 5 can indirectly reflect the indirect condition of the first sliding component 23 and the second sliding component 24; on the third hand, when the first support plate 4 and the second support plate 5 are worn, they are easy to disassemble and can be replaced at any time; on the fourth hand, even if there are certain processing size errors or installation position errors between the first sliding component 23 and the second sliding component 24, with the correction or assistance of the first vertical rail 25, the second vertical rail 26, the first support plate 4, and the second support plate 5, the slide 2 can also be ensured to lift vertically smoothly.

[0064] The lifting machine disclosed in this embodiment has the same technical solutions as those in Embodiment 1 and Embodiment 2. Please refer to Embodiment 1 and Embodiment 2 for the technical solutions, which will not be repeated here.

Claims

1. A lifting device, characterized in that: Including columns, slides and lifting parts; The slide is arranged in the column, the lifting part is arranged on the slide, and the slide is lifted and lowered along the column; The slide platform comprises a first side wall and a second side wall, a first sliding assembly is installed at the middle and lower part of the first side wall, and a second sliding assembly is installed at the middle and lower part of the second side wall; A first vertical track is arranged on the first side wall, and a second vertical track is arranged on the second side wall; The column includes a first bending plate and a second bending plate, the first bending plate includes a first U-shaped bending portion and a first L-shaped bending portion, and the second bending plate includes a second U-shaped bending portion and a second L-shaped bending portion; A first support plate is installed on the first L-shaped bending portion, wherein the first support plate abuts against the first vertical track; A second support plate is installed on the second L-shaped bent portion, wherein the second support plate abuts against the second vertical track; The first sliding component contacts the first U-shaped bending portion during the lifting process; The second sliding component contacts the second U-shaped bending portion during the lifting process.

2. The lifting device according to claim 1, characterized in that The first sliding assembly includes a first sliding block and a second sliding block, the first sliding block is arranged at the bottom or close to the bottom of the first side wall, the second sliding block is arranged above the first sliding block, and the distance between the first sliding block and the second sliding block is less than 0.5×H, where H is the height of the slide table; The second sliding assembly includes a third slider and a fourth slider, the third slider is arranged at the bottom or near the bottom of the second side wall, the fourth slider is arranged above the third slider, and the distance between the third slider and the fourth slider is less than 0.5×H, where H is the height of the slide.

3. The lifting device according to claim 2, characterized in that: The distance between the center point of the first support plate and the horizontal plane is 0.7×H; The distance between the center point of the second supporting plate and the horizontal plane is 0.7×H.

4. The lifting device according to claim 1, characterized in that: The first sliding assembly includes a first sliding block, and the first sliding block is arranged at the bottom or close to the bottom of the first side wall; The second sliding assembly includes a third sliding block, and the third sliding block is arranged at the bottom of the second side wall or close to the bottom.

5. The lifting device according to claim 4, characterized in that The first support plate is installed at the top or near the top of the first L-shaped bending portion; The second supporting plate is installed at or near the top of the second L-shaped bending portion.

6. The lifting device according to any one of claims 1 to 5, characterized in that: During the lifting process of the slide, the first vertical track always abuts against the first support plate, and the second vertical track always abuts against the second support plate.

7. The lifting device according to claim 6, characterized in that A reinforcing plate is arranged around the column, a first vertical plate and a second vertical plate are arranged on the front side of the reinforcing plate, a first protrusion is arranged on the first vertical plate, and the first protrusion abuts against the end of the first supporting plate; A second protrusion is provided on the second vertical plate, and the second protrusion abuts against the end of the second supporting plate.

8. The lifting device according to claim 6, characterized in that The friction coefficient between the first sliding component and the first U-shaped bending portion is 0.16-0.25, the friction coefficient between the second sliding component and the second U-shaped bending portion is 0.16-0.25, and the HR hardness of the surfaces of the first sliding component and the second sliding component is 75-85; The friction coefficient between the first support plate and the first vertical track is 0.16-0.25, the friction coefficient between the second support plate and the second vertical track is 0.16-0.25, and the HR hardness of the surfaces of the first support plate and the second support plate is 75-85.

9. The lifting device according to claim 6, characterized in that A first angle plate is arranged at the bottom of the first side wall, and a second angle plate is arranged at the bottom of the second side wall, wherein the first angle plate and the second angle plate support the lifting portion; A first long strip pad having the same thickness as the first angle plate is arranged above the first angle plate, and the first vertical track is arranged on the surfaces of the first angle plate and the first long strip pad; A second long strip pad having the same thickness as the second angle plate is arranged above the second angle plate, and the second vertical track is arranged on the surfaces of the second angle plate and the second long strip pad.

10. A lifting machine, characterized in that: At least one lifting device according to any one of claims 1-9.

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