A lifting column of an operating table and an operating table

Abstract

The embodiment of the present application provides a lifting column of an operating bed and an operating bed, wherein the lifting column comprises: a first column, a second column and a friction assembly, the second column can be lifted and sheathed on the first column, and a first spacing space and a second spacing space arranged oppositely are formed between the second column and the first column; the friction assembly comprises a first friction member arranged on the first column and a second friction member arranged on the second column, the first friction member is located in the first spacing space and contacts the second column, and the second friction member is located in the second spacing space and contacts the first column; when the second column rises or falls relative to the first column, the distance between the second friction member and the first friction member in the lifting direction of the second column gradually increases. The lifting column of the embodiment of the present application can improve the wear between the first friction member and the second column and between the second friction member and the first column, thereby increasing the wear life of the lifting column.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a lifting column of an operating table and an operating table. Background Art

[0002] In the related art, there is a kind of operating table with lifting function that relies on the lifting of the column to achieve the height adjustment of the tabletop. However, since the column also needs to bear the bending moment formed by the eccentric external force, the contact pressure of the friction pair on the column is also large under the action of a large bending moment, resulting in a relatively short wear life of the column. Summary of the invention

[0003] In view of this, the embodiments of the present application hope to provide a lifting column of an operating table and an operating table capable of increasing the wear life.

[0004] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present application provides a lifting column of an operating table, which is used to support the table top of the operating table, including:

[0005] First pillar;

[0006] A second column escapably connected to the first column, wherein a first spacing space and a second spacing space are formed between the second column and the first column.

[0007] A friction assembly, the friction assembly comprising a first friction member arranged on the first column and a second friction member arranged on the second column, the first friction member is located in the first spacing space and contacts the second column, the second friction member is located in the second spacing space and contacts the first column; when the second column rises or falls relative to the first column, the distance between the second friction member and the first friction member in the lifting direction of the second column gradually increases.

[0008] A second aspect of the embodiment of the present application provides an operating table, comprising: a table top, a base, a first driving mechanism and the lifting column described above;

[0009] The lifting column is used to support the table top, and the lifting column includes a first column and a second column which is escalably connected to the first column. The first column is arranged on the base, and the table top is arranged on the second column. A first spacing space and a second spacing space which are arranged opposite to each other are formed between the second column and the first column. The first spacing space and the second spacing space are arranged opposite to each other along the length direction of the table top. The lifting column also includes a friction assembly, and the friction assembly includes a first friction member arranged on the first column and a second friction member arranged on the second column. The first friction member is located in the first spacing space and contacts the second column, and the second friction member is located in the second spacing space and contacts the first column. When the second column rises or falls relative to the first column, the distance between the second friction member and the first friction member in the lifting direction of the second column gradually increases.

[0010] The first driving mechanism is used to drive the second column to rise and fall relative to the first column.

[0011] A third aspect of the embodiments of the present application provides an operating table, comprising: a table top, a base, a shaft frame, a first driving mechanism, a second driving mechanism, and the lifting column described above;

[0012] The lifting column is used to support the table top, the lifting column includes a first column, a second column escalably sleeved on the first column, the first column is arranged on the base, a first spacing space and a second spacing space arranged opposite to each other are formed between the second column and the first column, the shaft frame is rotatably connected to the second column, the table top is arranged on the shaft frame, the first spacing space and the second spacing space are arranged opposite to each other along the length direction of the table top, the lifting column also includes a friction assembly, the friction assembly includes a first friction member arranged on the first column and a second friction member arranged on the second column, the first friction member is located in the first spacing space and contacts with the second column, the second friction member is located in the second spacing space and contacts with the first column; when the second column rises or falls relative to the first column, the distance between the second friction member and the first friction member in the lifting direction of the second column gradually increases;

[0013] The first driving mechanism is used to drive the second column to rise and fall relative to the first column, and the second driving mechanism is used to drive the shaft frame to rotate relative to the second column.

[0014] The embodiment of the present application provides a lifting column of an operating bed and an operating bed, wherein the first friction member of the lifting column is arranged on the first column, the second friction member is arranged on the second column, and the first friction member and the second friction member are respectively located in a first spacing space and a second spacing space formed between the second column and the first column and oppositely arranged. When the second column rises or falls relative to the first column, the distance between the second friction member and the first friction member in the lifting direction of the second column gradually increases, that is, the force arm ΔL between the first friction member and the second friction member gradually increases, thereby causing the friction force f1 between the first friction member and the second column and the friction force f2 between the second friction member and the first column to gradually decrease, so that the wear between the first friction member and the second column and between the second friction member and the first column can be improved accordingly, thereby increasing the wear life of the lifting column. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a lifting column provided in an embodiment of the present application, in which the second column is in the second extreme position;

[0016] Figure 2 for Figure 1 The structural schematic diagram of the lifting column shown in the figure, the second column in the figure is in the first extreme position;

[0017] Figure 3 for Figure 1 A half-section view of the lifting column shown, in which the second column is in the second extreme position;

[0018] Figure 4 for Figure 3 The schematic diagram of the connection relationship between the first column and the first friction member and the third friction member shown;

[0019] Figure 5 for Figure 4 AA section view;

[0020] Figure 6 for Figure 5 The schematic diagram of the connection relationship between the second column and the second friction member and the fourth friction member shown;

[0021] Figure 7 for Figure 6 BB cross-sectional view;

[0022] Figure 8 for Figure 1 A half-section view of the lifting column shown, in which the second column is in the first extreme position;

[0023] Fig. 9 for Figure 8 Force analysis diagram of the lifting column shown;

[0024] Fig.10 A half-section view of a second lifting column provided in an embodiment of the present application, in which the second column is in a second extreme position;

[0025] Fig.11 for Fig.10 A half-section view of the second column of the lifting column shown in the first extreme position;

[0026] Fig.12 A half-section view of a third lifting column provided in an embodiment of the present application, wherein the second column in the figure is in a first extreme position;

[0027] Fig.13 for Fig.12 A half-section view of the second column of the lifting column shown in the second extreme position;

[0028] Fig.14 This is a schematic diagram of the structure of another lifting column of the present application, in which the second column is in the second extreme position;

[0029] Fig.15 for Fig.14 The structural schematic diagram of the lifting column shown in the figure shows that the second column is in the first extreme position.

[0030] Description of Reference Numerals

[0031] Lifting column 100; first partition space 100a; second partition space 100b; first column 110; first side wall 110a; second side wall 110b; second column 120; third side wall 120a; fourth side wall 120b; friction assembly 130; first friction member 131; second friction member 132; third friction member 133; fourth friction member 134; fifth friction member 135; sixth friction member 136. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

[0033] In the description of this application, the directions or positional relationships of "length direction", "lifting direction", "top" and "bottom" are based on the attached Figure 1 Regarding the orientation or positional relationship shown, it should be understood that these orientation terms are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] The present application embodiment provides a lifting column 100 of an operating table, which is used to support the table top of the operating table. Figures 1 to 4 , Figure 6 , Figure 8 , Fig.12 , Fig.13 The lifting column 100 includes a first column 110, a second column 120 and a friction assembly 130. The second column 120 is slidably mounted on the first column 110, and a first spacing space 100a and a second spacing space 100b are formed between the second column 120 and the first column 110. The friction assembly 130 includes a first friction member 131 disposed on the first column 110 and a second friction member 132 disposed on the second column 120. The first friction member 131 is located in the first spacing space 100a and contacts the second column 120, and the second friction member 132 is located in the second spacing space 100b and contacts the first column 110. Please refer to Figure 3 and Figure 8 When the second column 120 descends relative to the first column 110, the distance between the second friction member 132 and the first friction member 131 in the ascending and descending direction of the second column 120 (please refer to Figure 3 and Figure 8 The change of the force arm ΔL) gradually increases, or, see Fig.12 and Fig.13 When the second column 120 rises relative to the first column 110, the distance between the second friction member 132 and the first friction member 131 in the lifting direction of the second column 120 (please refer to Fig.12 and Fig.13 That is to say, the distance between the second friction member 132 and the first friction member 131 is not always constant. During the rising or falling of the second column relative to the first column, the second friction member moves with the second column, thereby making the distance between the second friction member and the first friction member in the lifting direction of the second column gradually increase.

[0035] The embodiment of the present application also provides an operating bed, which includes a table top, a base, a first driving mechanism, and a lifting column 100 of any embodiment of the present application. The lifting column 100 supports the table top, and the lifting column 100 includes a first column 110, a second column 120 that can be lifted and retracted on the first column 110, the first column 110 is arranged on the base, the table top is arranged on the second column 120, and a first spacing space 100a and a second spacing space 100b that are relatively arranged are formed between the first column 110 and the second column 120, and the first spacing space 100a and the second spacing space 100b are relatively arranged along the length direction of the table top; the first driving mechanism is used to drive the second column 120 to rise and fall relative to the first column 110.

[0036] The operating table can be in the form of an eccentric column, that is, the lifting column 100 is eccentrically arranged on the upper table of the base along the length direction of the table. The operating table can also be in the form of a central column, that is, the center line of the lifting column 100 roughly coincides with the center line of the table.

[0037] The table top can be directly connected to the second column 120, and can also be connected to the second column 120 through other intermediate connecting parts. For example, an axis frame and a second driving mechanism can be set on the operating bed. The axis frame is rotatably connected to the second column 120, and the second driving mechanism is drivingly connected to the axis frame. The table top is set on the axis frame. The axis frame can rotate relative to the second column 120 under the drive of the second driving mechanism to drive the table top to flip in a specific direction.

[0038] The lifting column 100 needs to support a structure such as a table top, so the table top and other structures will exert a certain eccentric external force on the lifting column 100, thereby causing the lifting column 100 to generate a certain bending moment under the action of the external force. Figure 8 Taking the lifting column 100 shown in FIG. 1 as an example, the lifting column 100 can be simplified as follows Fig. 9 In the cantilever beam shown in the figure, the end of the lifting column 100 connected to the base is the fixed end G of the lifting column 100, and the end of the lifting column 100 away from the fixed end G is the free end Z of the lifting column 100. From the equilibrium equation, it can be seen that the algebraic sum ∑M of the moments of the forces on the lifting column 100 to the fixed end G is G is 0, that is, ∑M G =0, by ∑M G =0, the following relationship can be obtained:

[0039] F Z ×L+F2×L2-F1×L1=0 (1)

[0040] Among them, F Z is the external force applied by the table to the lifting column 100, F1 is the force applied by the second column 120 to the first column 110 through the first friction member 131, F2 is the force applied by the second column 120 to the first column 110 through the second friction member 132, L is the distance between the fixed end G and the free end Z in the lifting direction of the second column 120, L1 is the distance between the action point of F1 and the fixed end G in the lifting direction of the second column 120, L2 is the distance between the action point of F2 and the fixed end G in the lifting direction of the second column 120. For the convenience of calculation, the present application simplifies the position of the action point of F1 to coincide with the transverse center line of the first friction member 131, and simplifies the position of the action point of F2 to coincide with the transverse center line of the second friction member 132.

[0041] Since the forces F1 and F2 are ZTherefore, the force F1 and the force F2 can be regarded as the internal force of the lifting column 100. Therefore, when the operating table is in a balanced state, it can be considered that the force F1 and the force F2 are equal in magnitude and opposite in direction, that is, F1 = F2. Therefore, the relationship (1) can be rewritten as:

[0042] F Z ×L+F1×L2-F1×L1=0 (2)

[0043] According to equation (2), we can get:

[0044] F Z ×L=F1×L1﹣F1×L2=F1×(L1﹣L2)=F1×ΔL (3)

[0045] ΔL is the distance between the action point of F1 and the action point of F2 in the lifting direction of the second column 120 , that is, the force arm ΔL between the first friction member 131 and the second friction member 132 .

[0046] According to common knowledge, the bending moment M at the free end Z is Z Satisfies the relationship:

[0047] M Z =F Z ×L (4)

[0048] Therefore, according to equations (3) and (4), we can get:

[0049] M Z =F1×ΔL (5)

[0050] Since the external force exerted by the table and other structures on the lifting column 100 is a fixed value (without considering the patient supported by the table, etc.), the bending moment M Z is also a fixed value. Therefore, according to equation (5), at the bending moment M Z When the force arm ΔL remains unchanged, the larger the force arm ΔL is, the smaller the force F1 is. Since F1=F2, the larger the force arm ΔL is, the smaller the force F2 is. That is to say, as the force arm ΔL increases, both the force F1 and the force F2 decrease. At the same time, according to common knowledge, the friction force f1 between the first friction member 131 and the second column 120 satisfies the relationship:

[0051] f1=μ1×F1 (6)

[0052] Wherein, μ1 is the dynamic friction coefficient between the first friction member 131 and the second column 120 .

[0053] The friction force f2 between the second friction member 132 and the first column 110 satisfies the relationship:

[0054] f2=μ2×F2 (7)

[0055] Wherein, μ2 is the dynamic friction coefficient between the second friction member 132 and the first column 110 .

[0056] According to equations (6) and (7), when the applied force F1 decreases, the friction force f1 will decrease accordingly, and when the applied force F2 decreases, the friction force f2 will also decrease accordingly. After the friction forces f1 and f2 decrease, the wear between the first friction member 131 and the second column 120 and between the second friction member 132 and the first column 110 will also be improved accordingly, thereby improving the wear life of the lifting column 100.

[0057] That is to say, the technical solution of the embodiment of the present application is to set the first friction member 131 on the first column 110, and set the second friction member 132 on the second column 120, and the first friction member 131 and the second friction member 132 are respectively located in the first spacing space 100a and the second spacing space 100b formed between the second column 120 and the first column 110. When the second column 120 rises or falls relative to the first column 110, the second friction member 132 and the first friction member 131 are in the rising or falling state of the second column 120. The distance in the descending direction gradually increases, that is, the force arm ΔL between the first friction member 131 and the second friction member 132 gradually increases, thereby making the friction force f1 between the first friction member 131 and the second column 120 and the friction force f2 between the second friction member 132 and the first column 110 gradually decrease, so that the wear between the first friction member 131 and the second column 120 and between the second friction member 132 and the first column 110 can be improved accordingly, thereby increasing the wear life of the lifting column 100.

[0058] In one embodiment, the material of the friction component 130 includes a polytetrafluoroethylene substrate and an additive, and the additive includes at least one of carbon, graphite, glass fiber, bronze and molybdenum disulfide. That is, the material of any friction part in the friction component 130 can be composed of a polytetrafluoroethylene substrate and an additive, and the additive can be a combination of one or more of graphite, glass fiber, bronze and molybdenum disulfide, thereby improving the wear resistance of the friction component 130.

[0059] Preferably, the mass of the additive accounts for 10-30% of the total amount of the tetrafluoroethylene substrate and the additive, thereby achieving a better wear-resistant effect.

[0060] In one embodiment, the friction coefficient of the friction component 130 is greater than 0 and less than 0.3, thereby improving the wear resistance of the friction component 130 .

[0061] In one embodiment, the first column or the second column is formed by splicing. For example, any one of the first column and the second column can be spliced ​​by two or four pieces. This can reduce the process difficulty when installing the corresponding friction parts.

[0062] In one embodiment, please refer to Figures 1 to 3 , Figure 8 , the second column 120 is sleeved on the outer side of the first column 110. At this time, the first friction member 131 and the second friction member 132 are equivalent to being located on opposite sides of the first column 110. When the second column 120 rises to the first limit position relative to the first column 110, the distance between the second friction member 132 and the first friction member 131 in the lifting direction of the second column 120 reaches the minimum value; when the second column 120 falls to the second limit position relative to the first column 110, the distance between the second friction member 132 and the first friction member 131 in the lifting direction of the second column 120 reaches the maximum value. That is to say, when the second column 120 is in the first extreme position, the friction force f1 and the friction force f2 are the largest. When the second column 120 descends relative to the first column 110, the force arm ΔL gradually increases, and the friction force f1 and the friction force f2 gradually decrease. When the second column 120 descends to the second extreme position, the force arm ΔL reaches the maximum value. At this time, the friction force f1 and the friction force f2 reach the minimum value, which is equivalent to that the closer the second column 120 is to the base, the less likely the first friction member 131 and the second friction member 132 are to wear.

[0063] It is understandable that the second column 120 is not limited to being sleeved on the outside of the first column 110. Fig.10 and Fig.11 In some embodiments, the first column 110 may be sleeved on the outer side of the second column 120 . When the first column 110 is sleeved on the outer side of the second column 120 , the first friction member 131 and the second friction member 132 are located at opposite sides of the second column 120 .

[0064] In one embodiment, please refer to Figure 3 , Figure 4 , Figure 6 The first friction member 131 is disposed near the top end of the first column 110, and the second friction member 132 is disposed near the bottom end of the second column 120. Thus, when the second column 120 descends relative to the first column 110, the length of the force arm ΔL can be increased as much as possible, so that the friction force f1 and the friction force f2 can be reduced as much as possible, thereby further improving the wear life of the lifting column 100.

[0065] In some embodiments, no matter the second column 120 is sleeved on the outside of the first column 110 or the first column 110 is sleeved on the outside of the second column 120, when the second column 120 rises to the first limit position relative to the first column 110, the distance between the second friction member 132 and the first friction member 131 in the lifting direction of the second column 120 reaches the maximum value (for example, Fig.13 When the second column 120 drops to the second limit position relative to the first column 110, the distance between the second friction member 132 and the first friction member 131 in the lifting direction of the second column 120 reaches a minimum value (for example Fig.12 That is to say, when the second column 120 rises to the first limit position, the force arm ΔL between the first friction member 131 and the second friction member 132 reaches a maximum value. At this time, the friction force f1 between the first friction member 131 and the second column 120 and the friction force f2 between the second friction member 132 and the first column 110 reach a minimum value, which is equivalent to that the farther the second column 120 is from the base, the less likely the first friction member 131 and the second friction member 132 are to wear.

[0066] In one embodiment, please refer to Figures 3 to 7 The first column 110 has a first side wall 110a and a second side wall 110b that are oppositely disposed, and the second column 120 has a third side wall 120a and a fourth side wall 120b that are oppositely disposed. A first spacing space 100a is formed between the first side wall 110a and the third side wall 120a, and a second spacing space 100b is formed between the second side wall 110b and the fourth side wall 120b; the first friction member 131 is disposed on the first side wall 110a, and the second friction member 132 is disposed on the fourth side wall 120b. In other words, the first column 120 has a first side wall 110a and a second side wall 120b that are oppositely disposed. The column 110 and the second column 120 may have multiple side walls. For example, the cross-sections of the first column 110 and the second column 120 may be rectangular, rhombus, triangular, polygonal, etc. The first side wall 110a of the first column 110 is arranged opposite to the third side wall 120a of the second column 120, and the second side wall 110b of the first column 110 is arranged opposite to the fourth side wall 120b of the second column 120. The first friction member 131 is arranged on the first side wall 110a, and the second friction member 132 is arranged on the fourth side wall 120b.

[0067] Further, in one embodiment, please refer to Figure 5 , the width H of the first friction member 131 m1 Greater than or equal to the width H of the first side wall 110a c1 1 / 2, that is, H m1 ≥H c1 / 2, that is, the contact area between the first friction member 131 and the second column 120 can be increased as much as possible to reduce the pressure on the first friction member 131.

[0068] Specifically, according to common knowledge, the smaller the pressure on the first friction member 131 is, the smaller the pressure acting on the unit area of ​​the first friction member 131 is. Accordingly, the smaller the friction force on the unit area of ​​the first friction member 131 is, and the smaller the friction force on the unit area is, the smaller the wear amount between the first friction member 131 and the second column 120 is. That is, the wear amount between the first friction member 131 and the second column 120 is positively correlated with the pressure on the first friction member 131. Therefore, by increasing the width H of the first friction member 131 m1 is set to be greater than or equal to the width H of the first side wall 110a c1 By reducing the length of the force arm ΔL by 1 / 2, the pressure on the first friction member 131 can be reduced without reducing the length of the force arm ΔL, thereby improving the wear between the first friction member 131 and the second column 120, and further increasing the wear life of the lifting column 100.

[0069] In one embodiment, please refer to Figure 7 , the width H of the second friction member 132 m2 It may also be greater than or equal to the width H of the fourth side wall 120b. c4 1 / 2, that is, H m2 ≥H c4 / 2, that is, the pressure on the second friction member 132 can be reduced by increasing the contact area between the second friction member 132 and the first column 110 as much as possible, so as to further improve the wear life of the lifting column 100.

[0070] In one embodiment, please refer to Fig.14 and Fig.15, the first column 110 also has a fifth side wall and a sixth side wall arranged oppositely, and the second column 120 also has a seventh side wall and an eighth side wall arranged oppositely; a third spacing space and a fourth spacing space arranged oppositely are formed between the second column 120 and the first column 110, a third spacing space is formed between the fifth side wall and the seventh side wall, and a fourth spacing space is formed between the sixth side wall and the eighth side wall; the friction assembly 130 also includes a fifth friction member 135 and a sixth friction member 136, the fifth friction member 135 is arranged on the fifth side wall of the first column 110, and the sixth friction member 136 is arranged on the eighth side wall of the second column 120, the fifth friction member 135 is located in the third spacing space and contacts the second column 120, and the sixth friction member 136 is located in the fourth spacing space and contacts the first column 110; when the second column 120 rises or falls relative to the first column 110, the distance between the fifth friction member 135 and the sixth friction member 136 in the lifting direction of the second column 120 gradually increases. That is to say, in addition to the first spacing space 100a and the second spacing space 100b relatively set between the second column 120 and the first column 110, a third spacing space and a fourth spacing space relatively set can also be formed. At the same time, a fifth friction member 135 connected to the first column 110 is arranged in the third spacing space, and a sixth friction member 136 connected to the second column 120 is arranged in the fourth spacing space. In the process of the second column 120 rising or falling relative to the first column 110, the distance between the fifth friction member 135 and the sixth friction member 136 in the lifting direction of the second column 120 can also gradually increase. Thereby, the stability of the second column 120 during the lifting process can be improved, and the wear between the first friction member 131 and the second column 120 can also be further improved.

[0071] In one embodiment, the area of ​​the first friction member 131 and / or the second friction member 132 is larger than the area of ​​the fifth friction member 135 and / or the sixth friction member 136. That is to say, the area of ​​at least one of the first friction member 131 and the second friction member 132 may be larger than the area of ​​the fifth friction member 135, or the area of ​​at least one of the first friction member 131 and the second friction member 132 may be larger than the area of ​​the sixth friction member 136, or the areas of both the first friction member 131 and the second friction member 132 may be larger than the areas of the fifth friction member 135 and the sixth friction member 136.

[0072] Since the first partition space 100a and the second partition space 100b are arranged relatively along the length direction of the table top, the first friction member 131 and the second friction member 132 are actually perpendicular to the length direction of the table top. Compared with the fifth friction member 135 and the sixth friction member 136 arranged in other directions, for example, the fifth friction member 135 and the sixth friction member 136 can be arranged in a direction parallel to the length direction of the table top. The friction force borne by the first friction member 131 and the second friction member 132 is the largest. Therefore, the area of ​​the fifth friction member 135 and / or the sixth friction member 136 can be appropriately reduced to save production costs.

[0073] In one embodiment, please refer to Figures 1 to 4 , Figure 6 , Figure 8 , Fig.12 , Fig.13 The friction assembly 130 further includes a third friction member 133 disposed on the first column 110 and a fourth friction member 134 disposed on the second column 120. The third friction member 133 is located in the second spacing space 100b and contacts the second column 120. The fourth friction member 134 is located in the first spacing space 100a and contacts the first column 110. Please refer to Figure 3 and Figure 8 When the second column 120 descends relative to the first column 110, the distance between the third friction member 133 and the fourth friction member 134 in the lifting direction of the second column 120 gradually increases, or when the second column 120 rises relative to the first column 110, the distance between the third friction member 133 and the fourth friction member 134 in the lifting direction of the second column 120 gradually increases.

[0074] Specifically, the arrangement of the first friction member 131 and the second friction member 132 described above is mainly aimed at the situation where a structure such as a table top applies an eccentric external force to one side of the lifting column 100. In some cases, the structure such as a table top may also apply an eccentric external force to the other side opposite to the lifting column 100. Therefore, the third friction member 133 and the fourth friction member 134 may also be arranged in a manner similar to the first friction member 131 and the second friction member 132. As a result, the wear between the third friction member 133 and the second column 120 and between the fourth friction member 134 and the first column 110 can be improved accordingly, thereby further improving the wear life of the lifting column 100.

[0075] In one embodiment, please refer to Figures 1 to 3 , Figure 8, along the lifting direction of the second column 120, the first friction member 131 is located on the upper side of the fourth friction member 134, and the third friction member 133 is located on the upper side of the second friction member 132. That is to say, when the second column 120 rises to the first limit position relative to the first column 110, the distance between the second friction member 132 and the first friction member 131 in the lifting direction of the second column 120 reaches a maximum value, and the distance between the third friction member 133 and the fourth friction member 134 in the lifting direction of the second column 120 also reaches a maximum value. When the second column 120 drops to the second limit position relative to the first column 110, the second friction member 132 and the first friction member 131 are The distance between the third friction member 133 and the fourth friction member 134 in the lifting direction of the second column 120 reaches a minimum value, and the distance between the third friction member 133 and the fourth friction member 134 in the lifting direction of the second column 120 also reaches a minimum value, which is equivalent to that the distance between the third friction member 133 and the fourth friction member 134 in the lifting direction of the second column 120 and the distance between the second friction member 132 and the first friction member 131 in the lifting direction of the second column 120 increase or decrease synchronously. Therefore, it is convenient to set the first friction member 131, the second friction member 132, the third friction member 133 and the fourth friction member 134, and the overall force condition of the lifting column 100 can be made more stable.

[0076] It is understandable that, in some embodiments, the relative position between the first friction member 131 and the fourth friction member 134 , and the relative position between the third friction member 133 and the second friction member 132 can be adjusted as needed, and are not limited herein.

[0077] In some embodiments, when the distance between the second friction member 132 and the first friction member 131 in the lifting direction of the second column 120 reaches a minimum value, the distance between the third friction member 133 and the fourth friction member 134 in the lifting direction of the second column 120 reaches a maximum value; when the distance between the second friction member 132 and the first friction member 131 in the lifting direction of the second column 120 reaches a maximum value, the distance between the third friction member 133 and the fourth friction member 134 in the lifting direction of the second column 120 reaches a minimum value.

[0078] In one embodiment, please refer to Figures 3 to 7 When the first pillar 110 and the second pillar 120 are in a structural form with multiple side walls, the third friction member 133 can be disposed on the second side wall 110b, and the fourth friction member 134 can be disposed on the third side wall 120a.

[0079] In one embodiment, please refer to Figure 5 , the width H of the third friction member 133 m3 It may also be greater than or equal to the width H of the second side wall 110b. c2 1 / 2, that is, H m3 ≥Hc2 / 2, that is, the pressure on the third friction member 133 can be reduced by increasing the contact area between the third friction member 133 and the second column 120 as much as possible, so as to further improve the wear life of the lifting column 100.

[0080] In one embodiment, please refer to Figure 7 , the width H of the fourth friction member 134 m4 It may also be greater than or equal to the width H of the third side wall 120a. c3 1 / 2, that is, H m4 ≥H c3 / 2, that is, the pressure on the fourth friction member 134 can be reduced by increasing the contact area between the fourth friction member 134 and the first column 110 as much as possible, so as to further improve the wear life of the lifting column 100.

[0081] In the embodiment of the present application, the friction component 130 may be a sliding friction component 130, for example, Figure 1 and Figure 2 The first friction member 131, the second friction member 132, the third friction member 133 and the fourth friction member 134 are all friction plates, and the friction assembly 130 can also be a rolling friction assembly 130, for example, the first friction member 131, the second friction member 132, the third friction member 133 and the fourth friction member 134 are all rollers or drums.

[0082] The various embodiments / implementations provided in this application can be combined with each other without causing any contradiction.

[0083] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A lifting column of an operating table, used to support the tabletop of the operating table, characterized in that: The lifting column comprises: First pillar; A second column escapably connected to the first column, wherein a first spacing space and a second spacing space are formed between the second column and the first column. A friction assembly, the friction assembly comprising a first friction member arranged on the first column and a second friction member arranged on the second column, the first friction member is located in the first spacing space and contacts the second column, the second friction member is located in the second spacing space and contacts the first column; when the second column rises or falls relative to the first column, the distance between the second friction member and the first friction member in the lifting direction of the second column gradually increases.

2. The lifting column according to claim 1, characterized in that: When the second column descends to a first limit position relative to the first column, the distance between the second friction member and the first friction member in the lifting direction of the second column reaches a maximum value; or, When the second column rises to a second limit position relative to the first column, the distance between the second friction member and the first friction member in the lifting direction of the second column reaches a maximum value.

3. The lifting column according to claim 2, characterized in that: The first friction member is disposed near the top end of the first column, and the second friction member is disposed near the bottom end of the second column.

4. The lifting column according to any one of claims 1 to 3, characterized in that: The material of the friction component includes a polytetrafluoroethylene substrate and an additive, and the additive includes at least one of carbon, graphite, glass fiber, bronze and molybdenum disulfide.

5. The lifting column according to any one of claims 1 to 3, characterized in that: The friction coefficient of the friction component is greater than 0 and less than 0.

3.

6. The lifting column according to any one of claims 1 to 3, characterized in that: The first column has a first side wall and a second side wall which are oppositely arranged, the second column has a third side wall and a fourth side wall which are oppositely arranged, the first spacing space is formed between the first side wall and the third side wall, the second spacing space is formed between the second side wall and the fourth side wall, the first friction member is arranged on the first side wall, and the second friction member is arranged on the fourth side wall; And / or, the width of the first friction member is greater than or equal to 1 / 2 of the width of the first side wall; and / or, the width of the second friction member is greater than or equal to 1 / 2 of the width of the fourth side wall.

7. The lifting column according to claim 1, characterized in that: The friction assembly further includes a third friction member disposed on the first column and a fourth friction member disposed on the second column, the third friction member is located in the second spacing space and in contact with the second column, and the fourth friction member is located in the first spacing space and in contact with the first column; When the second column rises or falls relative to the first column, the distance between the third friction member and the fourth friction member in the lifting direction of the second column gradually increases.

8. The lifting column according to claim 7, characterized in that: Along the lifting direction of the second column, the first friction member is located on the upper side of the fourth friction member, and the third friction member is located on the upper side of the second friction member.

9. The lifting column according to claim 7 or 8, characterized in that: The first pillar has a first side wall and a second side wall which are arranged opposite to each other, the second pillar has a third side wall and a fourth side wall which are arranged opposite to each other, the first spacing space is formed between the first side wall and the third side wall, the second spacing space is formed between the second side wall and the fourth side wall, the third friction member is arranged on the second side wall, and the fourth friction member is arranged on the third side wall; and / or, The width of the third friction member is greater than or equal to 1 / 2 of the width of the second side wall; and / or the width of the fourth friction member is greater than or equal to 1 / 2 of the width of the third side wall.

10. The lifting column according to claim 6, characterized in that: The first column further comprises a fifth side wall and a sixth side wall which are arranged opposite to each other, and the second column further comprises a seventh side wall and an eighth side wall which are arranged opposite to each other; A third spacing space and a fourth spacing space which are arranged opposite to each other are formed between the second column and the first column, the third spacing space is formed between the fifth side wall and the seventh side wall, and the fourth spacing space is formed between the sixth side wall and the eighth side wall; The friction assembly further includes a fifth friction member and a sixth friction member, wherein the fifth friction member is disposed on the fifth side wall of the first pillar, and the sixth friction member is disposed on the eighth side wall of the second pillar, the fifth friction member is located in the third spacing space and in contact with the second pillar, and the sixth friction member is located in the fourth spacing space and in contact with the first pillar; When the second column rises or falls relative to the first column, the distance between the fifth friction member and the sixth friction member in the lifting direction of the second column gradually increases.

11. The lifting column according to claim 10, wherein an area of ​​the first friction member and / or the second friction member is greater than an area of ​​the fifth friction member and / or the sixth friction member.

12. The lifting column according to claim 1, characterized in that: The friction component is a sliding friction component or a rolling friction component.

13. The lifting column according to claim 1, characterized in that: The first column or the second column is formed by splicing.

14. An operating table, characterized in that: include: A table top, a base, a first driving mechanism and a lifting column; The lifting column is used to support the table top, and the lifting column includes a first column and a second column which is escalably connected to the first column. The first column is arranged on the base, and the table top is arranged on the second column. A first spacing space and a second spacing space which are arranged opposite to each other are formed between the second column and the first column. The first spacing space and the second spacing space are arranged opposite to each other along the length direction of the table top. The lifting column also includes a friction assembly, and the friction assembly includes a first friction member arranged on the first column and a second friction member arranged on the second column. The first friction member is located in the first spacing space and contacts the second column, and the second friction member is located in the second spacing space and contacts the first column. When the second column rises or falls relative to the first column, the distance between the second friction member and the first friction member in the lifting direction of the second column gradually increases. The first driving mechanism is used to drive the second column to rise and fall relative to the first column.

15. The operating table according to claim 14, characterized in that: Along the length direction of the table top, the lifting column is eccentrically arranged on the base.

16. An operating table, characterized in that: include: A table top, a base, a shaft frame, a first driving mechanism, a second driving mechanism and a lifting column; The lifting column is used to support the table top, the lifting column includes a first column, a second column escalably sleeved on the first column, the first column is arranged on the base, a first spacing space and a second spacing space arranged opposite to each other are formed between the second column and the first column, the shaft frame is rotatably connected to the second column, the table top is arranged on the shaft frame, the first spacing space and the second spacing space are arranged opposite to each other along the length direction of the table top, the lifting column also includes a friction assembly, the friction assembly includes a first friction member arranged on the first column and a second friction member arranged on the second column, the first friction member is located in the first spacing space and contacts with the second column, the second friction member is located in the second spacing space and contacts with the first column; when the second column rises or falls relative to the first column, the distance between the second friction member and the first friction member in the lifting direction of the second column gradually increases; The first driving mechanism is used to drive the second column to rise and fall relative to the first column, and the second driving mechanism is used to drive the shaft frame to rotate relative to the second column.

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