Lifting mechanism and lifting table thereof

Abstract

The lifting mechanism comprises a lifting driving mechanism, the lifting driving mechanism comprises a vertically-extending lead screw, a fourth lifting pipe and a lifting rod, the bottom end of the lead screw extends into the fourth lifting pipe, the top end of the lead screw extends out of the fourth lifting pipe, the lead screw is in threaded connection with the fourth lifting pipe, and the lifting rod is in threaded connection with the lead screw. The side wall of the fourth lifting pipe is provided with two guide pieces which are distributed up and down, a flexible piece is wound between the two guide pieces, the flexible piece is provided with two connecting blocks, one connecting block is located on one side between the two guide pieces, the other connecting block is located on the other side between the two guide pieces, and the two connecting blocks are connected with the two guide pieces. And one connecting block is fixedly connected with the lifting rod. The invention further discloses the lifting table. The lifting table is reasonable in structural design, two-section height lifting can be achieved, and the height of the table plate can reach three times of the length of the lead screw.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting tables, and in particular to a lifting mechanism and a lifting table thereof. Background Art

[0002] The height of the lifting table can be adjusted according to the needs of the user, but the existing lifting table generally adopts a transmission structure of a screw rod and a nut. This existing transmission structure can only achieve lifting and lowering to a certain height (i.e. the height generated by the relative movement distance of the screw rod and the nut). The height of the table top can only reach up to twice the length of the screw rod, which makes the lifting height adjustment ability limited and inconvenient to use. Summary of the invention

[0003] The purpose of the present invention is to provide a lifting mechanism to solve the technical problem that the existing transmission structure can only achieve lifting to a certain height (i.e. the height generated by the relative movement of the screw rod and the nut), and the height of the table top can only reach twice the length of the screw rod, thereby making the lifting height adjustment ability limited and inconvenient to use.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention provides a lifting mechanism, including a lifting drive mechanism, the lifting drive mechanism including a vertically extending screw rod, a fourth lifting tube, and a lifting rod, the bottom end of the screw rod extends into the interior of the fourth lifting tube, the top end of the screw rod extends out of the fourth lifting tube, the screw rod is threadedly connected to the fourth lifting tube, the side wall of the fourth lifting tube is provided with two guide members distributed up and down, a flexible member is wound between the two guide members, two connecting blocks are provided on the flexible member, one of the connecting blocks is located on one side between the two guide members, and the other connecting block is located on the other side between the two guide members, and one of the connecting blocks is connected and fixed to the lifting rod.

[0005] Furthermore, the guide member is a fixed pulley, and the side wall of the fourth lifting tube is rotatably provided with two fixed pulleys distributed up and down.

[0006] Furthermore, the side wall of the fourth lifting tube is fixedly provided with two L-shaped plates distributed up and down, the vertical plate of the L-shaped plate is perpendicular to and fixedly connected to the side wall of the fourth lifting tube, and the parallel plate of the L-shaped plate is parallel to the side wall of the fourth lifting tube; the two guide members are respectively located on the side away from each other of the two L-shaped plates, and the guide members are rotatably arranged between the side wall of the fourth lifting tube and the parallel plate of the L-shaped plate through a rotating shaft, and the two L-shaped plates are located inside the flexible member.

[0007] Furthermore, the flexible member is a steel wire rope.

[0008] Furthermore, a nut is provided at the top end of the fourth lifting tube, the middle part of the screw rod is threadedly connected to the nut, a support block is provided at the bottom end of the screw rod, and the bottom end of the screw rod is rotatably matched with the fourth lifting tube through the support block.

[0009] Furthermore, the lifting mechanism also includes a first lifting tube, a second lifting tube, and a third lifting tube extending vertically, the second lifting tube is movably arranged inside the first lifting tube, and the third lifting tube is movably arranged inside the second lifting tube; the lifting drive mechanism is arranged inside the third lifting tube, the other connecting block is connected and fixed to the inner wall of the third lifting tube, the fourth lifting tube is connected and fixed to the second lifting tube, and the lifting rod is connected and fixed to the first lifting tube.

[0010] Furthermore, the connecting block is provided with two first positioning columns and a first screw hole, the top of the lifting rod is provided with two first positioning holes and a first connecting hole, and the bottom of the third lifting tube is provided with two second positioning holes and a second connecting hole; one of the connecting blocks is respectively positioned, matched and screwed with the two first positioning holes and the first connecting hole of the lifting rod through the two first positioning columns and the first screw hole, and the other connecting block is respectively positioned, matched and screwed with the two second positioning holes and the second connecting hole of the third lifting tube through the two first positioning columns and the first screw hole.

[0011] Furthermore, a second screw hole is provided at the bottom end of the fourth lifting tube, a third screw hole is provided at the bottom end of the lifting rod, a first connecting plate is provided at the bottom end of the second lifting tube, a second connecting plate is provided at the bottom end of the first lifting tube, the bottom end of the fourth lifting tube is screwed and fixed to the first connecting plate through the second screw hole, and the bottom end of the lifting rod is screwed and fixed to the second connecting plate through the third screw hole.

[0012] A lifting table comprises a table top, wherein the bottom of the table top is provided with two table legs that can be lifted and lowered, and the table legs are the lifting mechanism described in any of the above technical solutions; the top of the third lifting tube is fixedly connected to the bottom of the table top, and the top end of the screw rod is rotatably connected to the bottom of the table top through a bearing.

[0013] Furthermore, two assembly box bodies are respectively provided between the table top and the two table legs, the bottom wall of the assembly box body is connected and fixed to the bearing, the bottom wall of the assembly box body is connected and fixed to the top end of the third lifting tube, and the top end of the screw rod passes upward through the bottom wall of the assembly box body; a motor is provided inside the assembly box body, and the motor is transmission-connected to the top end of the screw rod.

[0014] In summary, the technical solution of the present invention has the following beneficial effects: the structural design of the present invention is reasonable, (1) by including a lifting drive mechanism, the lifting drive mechanism includes a vertically extending screw rod, a fourth lifting tube, and a lifting rod, the bottom end of the screw rod extends into the interior of the fourth lifting tube, the top end of the screw rod extends out of the outside of the fourth lifting tube, and the screw rod is threadedly connected to the fourth lifting tube; therefore, when in use, the screw rod can be driven by a motor or other equipment to rotate in the forward direction, so that the rotation of the screw rod drives the fourth lifting tube to move downward relative to the screw rod, or the screw rod can be driven to rotate in the reverse direction, so that the rotation of the screw rod drives the fourth lifting tube to reset upward relative to the screw rod. (2) Two guide members distributed vertically are provided through the side wall of the fourth lifting tube, a flexible member is wound between the two guide members, and two connecting blocks are provided on the flexible member, one of which is located on one side between the two guide members, and the other is located on the other side between the two guide members, and one of the connecting blocks is connected and fixed to the lifting rod; so that when in use, the other connecting block can be fixed, and then the fourth lifting tube can be used to move downward relative to the screw rod, causing the flexible member to rotate around the two guide members, and the rotation of the flexible member will in turn drive one of the connecting blocks and the lifting rod to move downward relative to the fourth lifting tube, or the fourth lifting tube can be used to reset upward relative to the screw rod, causing the flexible member to rotate around the two guide members, and the rotation of the flexible member will in turn drive one of the connecting blocks and the lifting rod to reset upward relative to the fourth lifting tube. From this analysis, it can be seen that the present invention can achieve two levels of lifting height (i.e., the height generated by the relative movement distance between the screw rod and the fourth lifting tube, and the height generated by the relative movement distance between the fourth lifting tube and the lifting rod) through the sequential cooperation of the guide member, the flexible member, the connecting block, and the lifting rod; when the lifting mechanism is applied to a lifting table (but in fact the lifting mechanism can also be applied to other equipment with the same needs), the height of the table top can reach 3 times the length of the screw rod, thereby improving the lifting height adjustment capability and facilitating use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention when viewed from above;

[0016] Figure 2 It is a top view of the three-dimensional structure of the present invention;

[0017] Figure 3 It is a top view of the three-dimensional structure of the present invention without the table top;

[0018] Figure 4 It is a top view of the three-dimensional structure of the present invention without the table crossbeam assembly;

[0019] Figure 5 It is a top view of the three-dimensional structure of the present invention without the upper side wall of the assembly box body;

[0020] Figure 6It is a top view of the three-dimensional structure of the present invention without the assembly box body;

[0021] Figure 7 It is a schematic diagram of the three-dimensional structure of the present invention without the base;

[0022] Figure 8 It is a schematic diagram of the three-dimensional structure of the present invention without the first lifting tube;

[0023] Fig. 9 It is a schematic diagram of the three-dimensional structure of the present invention without the second lifting tube;

[0024] Fig.10 It is a schematic diagram of the three-dimensional structure of the present invention without the third lifting tube;

[0025] Fig.11 yes Fig.10 A partial enlarged view of the upper side;

[0026] Fig.12 yes Fig.10 A partial enlarged view of the lower side;

[0027] Fig.13 It is a schematic diagram of the three-dimensional structure of the present invention without the lifting rod;

[0028] Fig.14 It is a schematic diagram of the three-dimensional structure of the present invention without the fourth lifting tube;

[0029] Description of the reference numerals: table top (1), table leg (2), lifting drive mechanism (3), base (4), table crossbeam assembly (5), assembly box (6), operating panel (7), support frame (8);

[0030] A first lifting tube (201), a second lifting tube (202), a third lifting tube (203), a first connecting plate (204), a second connecting plate (205); a screw rod (301), a fourth lifting tube (302), a lifting rod (303), a bearing (304), a guide member (305), a flexible member (306), a connecting block (307), a nut (308), a supporting block (309), an L-shaped plate (3010), a rotating shaft (30 11), a first positioning column (3012), a first screw hole (3013), a first positioning hole (3014), a first connecting hole (3015), a second positioning hole (3016), a second connecting hole (3017), a second screw hole (3018), and a third screw hole (3019); a rectangular groove (401); a connecting plate (501), a lap plate (502); a motor (601), a plug (602), and a wire (603). DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention, but this does not constitute a limitation on the protection scope of the present invention.

[0032] In the present invention, for a clearer description, the following explanation is made: the observer faces the attached Figure 1 For observation, the left side of the observer is set as left, the right side of the observer is set as right, the front of the observer is set as front, the back of the observer is set as back, the top of the observer is set as top, and the bottom of the observer is set as bottom. It should be pointed out that the terms "front end", "rear end", "left side", "right side", "middle", "top", "bottom" and the like in the text indicate the orientation or position relationship based on the orientation or position relationship set in the drawings, which is only for the convenience of clearly describing the present invention, and does not indicate or imply that the structure or component referred to must have a specific orientation or be constructed in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", and "fourth" are only used for the purpose of clarity or simplification of description, and cannot be understood as indicating or implying relative importance or quantity.

[0033] See also Figures 1 to 14The present embodiment provides a lifting mechanism, including a lifting drive mechanism 3, the lifting drive mechanism 3 includes a vertically extending screw rod 301, a fourth lifting tube 302, and a lifting rod 303, the bottom end of the screw rod 301 extends into the interior of the fourth lifting tube 302, the top end of the screw rod 301 extends out of the fourth lifting tube 302, the screw rod 301 is threadedly connected to the fourth lifting tube 302, the side wall of the fourth lifting tube 302 is provided with two guide members 305 distributed up and down, a flexible member 306 is wound between the two guide members 305, and two connecting blocks 307 are provided on the flexible member 306, one of the connecting blocks 307 is located on one side between the two guide members 305, and the other connecting block 307 is located on the other side between the two guide members 305, and one of the connecting blocks 307 is connected and fixed to the lifting rod 303. Function: (1) The lifting drive mechanism includes a vertically extending screw rod, a fourth lifting tube, and a lifting rod, wherein the bottom end of the screw rod extends into the interior of the fourth lifting tube, and the top end of the screw rod extends out of the exterior of the fourth lifting tube, and the screw rod is threadedly connected to the fourth lifting tube; thus, when in use, a motor or other device can be used to drive the screw rod to rotate in the forward direction, so that the rotation of the screw rod drives the fourth lifting tube to move downward relative to the screw rod, or the screw rod can be driven to rotate in the reverse direction, so that the rotation of the screw rod drives the fourth lifting tube to reset upward relative to the screw rod. (2) Two guide members distributed vertically are provided through the side wall of the fourth lifting tube, a flexible member is wound between the two guide members, and two connecting blocks are provided on the flexible member, one of which is located on one side between the two guide members, and the other is located on the other side between the two guide members, and one of the connecting blocks is connected and fixed to the lifting rod; so that when in use, the other connecting block can be fixed, and then the fourth lifting tube can be used to move downward relative to the screw rod, causing the flexible member to rotate around the two guide members, and the rotation of the flexible member will in turn drive one of the connecting blocks and the lifting rod to move downward relative to the fourth lifting tube, or the fourth lifting tube can be used to reset upward relative to the screw rod, causing the flexible member to rotate around the two guide members, and the rotation of the flexible member will in turn drive one of the connecting blocks and the lifting rod to reset upward relative to the fourth lifting tube. From this analysis, it can be seen that the present invention can achieve two levels of lifting height (i.e., the height generated by the relative movement distance between the screw rod and the fourth lifting tube, and the height generated by the relative movement distance between the fourth lifting tube and the lifting rod) through the sequential cooperation of the guide member, the flexible member, the connecting block, and the lifting rod; when the lifting mechanism is applied to a lifting table (but in fact the lifting mechanism can also be applied to other equipment with the same needs), the height of the table top can reach 3 times the length of the screw rod, thereby improving the lifting height adjustment capability and facilitating use.

[0034] Specifically, the guide member 305 is a fixed pulley, and the side wall of the fourth lifting tube 302 is rotatably provided with two fixed pulleys distributed up and down. Function: The provision of the fixed pulley can greatly facilitate the rotation of the flexible member, thereby facilitating the up and down movement of the lifting rod.

[0035] Specifically, two L-shaped plates 3010 are fixedly arranged on the side wall of the fourth lifting tube 302 and are distributed vertically. The vertical plates of the L-shaped plates 3010 are perpendicular to and fixedly connected to the side wall of the fourth lifting tube 302, and the parallel plates of the L-shaped plates 3010 are parallel to the side wall of the fourth lifting tube 302. Two guide members 305 are respectively located on the sides of the two L-shaped plates 3010 that are away from each other. The guide members 305 are rotatably arranged between the side wall of the fourth lifting tube 302 and the parallel plates of the L-shaped plates 3010 through the rotating shaft 3011. The two L-shaped plates 3010 are located inside the flexible member 306. Function: The L-shaped plates can facilitate the arrangement of the rotating shaft 3011, and facilitate the rotation of the flexible member and the fixed pulley.

[0036] Specifically, the flexible member 306 is a steel wire rope. Function: The steel wire rope has good flexibility and strength, and other materials such as belts, chains, etc. are also acceptable as long as they can be adapted.

[0037] Specifically, a nut 308 is provided at the top of the fourth lifting tube 302, the middle of the screw rod 301 is threadedly connected to the nut 308, and a support block 309 is provided at the bottom of the screw rod 301. The bottom of the screw rod 301 is rotatably matched with the fourth lifting tube 302 through the support block 309. Function: The nut 308 can realize the threaded match between the screw rod 301 and the fourth lifting tube 302, and the support block 309 can prevent the screw rod 301 from shaking.

[0038] Specifically, the lifting mechanism also includes a first lifting tube 201, a second lifting tube 202, and a third lifting tube 203 extending vertically. The second lifting tube 202 is movably arranged inside the first lifting tube 201, and the third lifting tube 203 is movably arranged inside the second lifting tube 202; the lifting drive mechanism 3 is arranged inside the third lifting tube 203, another connecting block 307 is connected and fixed to the inner wall of the third lifting tube 203, the fourth lifting tube 302 is connected and fixed to the second lifting tube 202, and the lifting rod 303 is connected and fixed to the first lifting tube 201. Function: The bottom end of the first lifting tube can be used to form a support with the ground, the second lifting tube can make an intermediate transition, and the top end of the third lifting tube can form a support with the table board. Therefore, when the screw rod 301 rotates forward, since the third lifting tube 203 and another connecting block 307 remain stationary, the fourth lifting tube 302 will drive the second lifting tube 202 to move downward, and the lifting rod 303 will drive the first lifting tube 201 to move downward. In this way, the first lifting tube, the second lifting tube, and the third lifting tube can be fully unfolded, and the height between the ground and the table board is correspondingly generated. The height of the lifting can reach two sections (i.e., the height generated by the relative movement distance between the first lifting tube and the second lifting tube, and the height generated by the relative movement distance between the second lifting tube and the third lifting tube). The height of the table board can reach 3 times the length of the screw rod. If the three need to be folded, the screw rod can be rotated in the opposite direction, which is simple and convenient to operate. Of course, this structure can also be applied to other equipment that requires the same lifting function.

[0039] Specifically, two first positioning columns 3012 and a first screw hole 3013 are provided on the connection block 307, two first positioning holes 3014 and a first connecting hole 3015 are provided on the top of the lifting rod 303, and two second positioning holes 3016 and a second connecting hole 3017 are provided on the bottom of the third lifting tube 203; one of the connection blocks 307 is respectively positioned, matched and screwed with the two first positioning holes 3014 and the first connecting hole 3015 of the lifting rod 303 through the two first positioning columns 3012 and the first screw hole 3013, and the other connection block 307 is respectively positioned, matched and screwed with the two second positioning holes 3016 and the second connecting hole 3017 of the third lifting tube 203 through the two first positioning columns 3012 and the first screw hole 3013. Function: In this way, the two connection blocks 307 are respectively connected and fixed with the lifting rod 303 and the third lifting tube 203, so that the first lifting tube, the second lifting tube and the third lifting tube can be fully unfolded and retracted up and down.

[0040] Specifically, the bottom end of the fourth lifting tube 302 is provided with a second screw hole 3018, the bottom end of the lifting rod 303 is provided with a third screw hole 3019, the bottom end of the second lifting tube 202 is provided with a first connecting plate 204, the bottom end of the first lifting tube 201 is provided with a second connecting plate 205, the bottom end of the fourth lifting tube 302 is screwed and fixed to the first connecting plate 204 through the second screw hole 3018, and the bottom end of the lifting rod 303 is screwed and fixed to the second connecting plate 205 through the third screw hole 3019. Function: Screws can achieve stable connection and facilitate synchronous movement.

[0041] Preferably, the first lifting tube 201, the second lifting tube 202, the third lifting tube 203 and the fourth lifting tube 302 are respectively the first rectangular tube, the second rectangular tube, the third rectangular tube and the fourth rectangular tube, the lifting rod 303 is an L-shaped bent plate, and the nut 308 is a rectangular block.

[0042] A lifting table includes a table top 1, the bottom of the table top 1 is provided with two table legs 2 capable of lifting, the table legs 2 being the lifting mechanism of any of the above technical solutions; the top of a third lifting tube 203 is fixedly connected to the bottom of the table top 1, and the top of a screw rod 301 is rotatably connected to the bottom of the table top 1 through a bearing 304. Function: This provides a case where the lifting mechanism is applied to the lifting table, and the bearing can realize the rotation of the screw rod while supporting the screw rod.

[0043] Specifically, two assembly boxes 6 are respectively arranged between the table top 1 and the two table legs 2, the bottom wall of the assembly box 6 is connected and fixed to the bearing 304, the bottom wall of the assembly box 6 is connected and fixed to the top of the third lifting tube 203, and the top of the screw rod 301 passes through the bottom wall of the assembly box 6 upward; the inside of the assembly box 6 is provided with a motor 601, and the motor 601 is drivingly connected to the top of the screw rod 301. Function: The motor 601 can drive the screw rod to rotate forward and reverse.

[0044] In order to make it easier to understand as a whole, the following is a further explanation:

[0045] See also Figures 1 to 14 The present embodiment provides a table beam assembly, including two connecting plates 501 distributed along the front and back, the connecting plates 501 include a plurality of lap plates 502 distributed in sequence along the left and right, and two adjacent lap plates 502 are detachably connected and fixed to each other so that the length of the connecting plates 501 can be adjusted; an assembly groove extending along the left and right is provided between the two connecting plates 501, and an assembly box body 6 is respectively provided at the left and right ends of the assembly groove, and the assembly box body 6 is detachably connected and fixed to the lap plates 502; support frames 8 extending along the front and back are also respectively provided at the left and right ends of the assembly groove, and the two support frames 8 are respectively located on the side away from each other of the two assembly box bodies 6, and the support frames 8 are detachably connected and fixed to the left wall or the right wall of the assembly box body 6. Function: (1) By including two connecting plates distributed along the front and back, the connecting plates include a plurality of lap plates distributed in sequence along the left and right, and the two adjacent lap plates can be detachably connected and fixed, so that the length of the connecting plates can be adjusted; thus, the number of lap plates in the connecting plates can be adjusted according to different desktop lengths and widths, or the two adjacent lap plates can be moved closer to or farther away from each other, thereby adjusting the length of the connecting plates. (2) An assembly groove extending along the left and right is provided between the two connecting plates, and an assembly box body is provided at the left and right ends of the assembly groove, respectively, and the assembly box body and the lap plates can be detachably connected and fixed; thereby, the connecting plates and the assembly box body are connected and fixed together. (3) Support frames extending along the front and back are also provided at the left and right ends of the assembly groove, respectively, and the two support frames are located on the side away from each other of the two assembly boxes, and the support frames are detachably connected and fixed to the left wall or the right wall of the assembly box body; thereby, the support frames are connected and fixed to the assembly box body and the connecting plates. From this analysis, it can be seen that the length of the table beam assembly of the present invention can be adjusted according to different desktop lengths and widths, and it has strong versatility.

[0046] Specifically, two adjacent lap plates 502 are connected by a plurality of screws and positioned by a plurality of positioning rods, so that the length of the connecting plate 501 can be adjusted. Function: In this arrangement, the positioning rods not only make the positioning accuracy high, but also the screws are very convenient for adjusting the length of the connecting plate 501 and the table beam assembly 5.

[0047] Specifically, the front and rear side walls of the assembly box body 6 are connected to the front and rear side lap plates 502 respectively by a plurality of screws and are positioned by a plurality of positioning rods. Function: This arrangement allows the assembly box body 6 and the lap plates 502 to be quickly positioned and installed, and is also easy to disassemble.

[0048] Specifically, the front and rear sides of the bottom of the assembly groove are respectively provided with edges protruding toward each other, and the front and rear sides of the top of the assembly groove are respectively provided with edges protruding away from each other. Function: The front and rear edges of the bottom of the assembly groove can support the assembly box body, making it easier to install the assembly box body 6, while the front and rear edges of the top of the assembly groove can be conveniently connected and fixed with the bottom screws of the table top and supported.

[0049] Specifically, the support frame 8 is connected to the left side wall or the right side wall of the assembly box body 6 by a plurality of screws and is positioned and matched by a plurality of positioning rods. Function: The support frame 8 can be quickly positioned and installed and fixed, and is also easy to disassemble.

[0050] Specifically, the support frame 8 is in an L-shaped plate shape, and the opening of the support frame 8 faces downward. Function: The upper horizontal surface of the support frame 8 can be supported and screwed with the bottom surface of the table board, and the vertical surface of the support frame 8 can be installed and fixed with the assembly box body.

[0051] When the table crossbeam assembly is used in the lifting table:

[0052] Preferably, the bottom of the table board 1 is provided with a table crossbeam assembly 5 extending left and right, and the table crossbeam assembly 5 is a table crossbeam assembly of any of the above technical solutions; the bottoms of the two assembly boxes 6 are respectively provided with table legs 2, and the support frame 8 and the connecting plate 501 are connected and fixed upwardly to the bottom of the table board 1 by a number of screws. Function: The support frame 8 and the connecting plate 501 support the table board 1 together, thereby improving the force balance of the table board. The length of the table crossbeam assembly of the present invention can be adjusted according to the tabletop length and width of different table boards, and has strong versatility.

[0053] Specifically, a base 4 extending forward and backward is respectively provided below the two table legs 2, and a rectangular groove 401 is provided in the middle of the base 4. The base 4 is screwed and fixed to the bottom of the table legs 2 through the rectangular groove 401. Function: The base 4 can provide stable support.

[0054] Preferably, the base 4 is connected and fixed with the bottom end screw of the first lifting tube 201 through the rectangular groove 401. Function: The base is fixed with the first lifting tube.

[0055] Specifically, an operation panel 7 is provided at the edge of the table top 1, and the motor 601 is a worm gear reduction motor. The operation panel 7 is electrically connected to the two worm gear reduction motors; the plug 602 of the worm gear reduction motor passes through the assembly box 6 through the wire 603. Function: The operation panel facilitates the control of the motor operation, the self-locking ability of the worm gear reduction motor can prevent the lead screw from rotating by itself, and the plug 602 can provide electrical energy for the motor.

[0056] The following is an example of a lifting table to illustrate the lifting mechanism (but other equipment can also use the lifting mechanism). When the lifting table is actually used: (1) the bottom end of the first lifting tube can be used to form a support with the ground, the second lifting tube can be used for intermediate transition, and the top end of the third lifting tube can form a support with the table board. (2) When it is necessary to raise the table board, first rotate the screw rod in the positive direction, and then the rotation of the screw rod will drive the fourth lifting tube to move downward. Since the other connecting block and the third lifting tube are fixed relative to the table board at this time, the flexible member will rotate around the two guide members, so that the flexible member will move downward with one of the connecting blocks and the lifting rod in turn. (3) When the fourth lifting tube moves downward, it will drive the second lifting tube to move downward, and at the same time, the lifting rod will drive the first lifting tube to move downward. In this way, the first lifting tube, the second lifting tube, and the third lifting tube can be fully unfolded, and the height between the ground and the table board will be generated accordingly. If it is necessary to lower the table board, the screw rod can be rotated in the opposite direction. The operation is simple and convenient. From this analysis, it can be seen that the present invention can achieve two levels of lifting height (i.e., the height generated by the relative movement distance of the first lifting tube and the second lifting tube, and the height generated by the relative movement distance of the second lifting tube and the third lifting tube) through the sequential cooperation of the guide part, the flexible part, the connecting block, and the lifting rod. The height of the table top can reach 3 times the length of the screw rod, thereby improving the lifting height adjustment capability and facilitating use.

[0057] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A lifting mechanism, comprising a lifting drive mechanism (3), characterized in that: The lifting drive mechanism (3) comprises a vertically extending screw rod (301), a fourth lifting tube (302), and a lifting rod (303); the bottom end of the screw rod (301) extends into the interior of the fourth lifting tube (302), and the top end of the screw rod (301) extends out of the fourth lifting tube (302); the screw rod (301) is threadedly connected to the fourth lifting tube (302); the side wall of the fourth lifting tube (302) is provided with two guide members (305) distributed along the upper and lower sides; a flexible member (306) is wound between the two guide members (305); two connecting blocks (307) are provided on the flexible member (306); one of the connecting blocks (307) is located on one side between the two guide members (305), and the other connecting block (307) is located on the other side between the two guide members (305); and one of the connecting blocks (307) is connected and fixed to the lifting rod (303).

2. A lifting mechanism according to claim 1, characterized in that: The guide member (305) is a fixed pulley, and the side wall of the fourth lifting tube (302) is rotatably provided with two fixed pulleys distributed up and down.

3. A lifting mechanism according to claim 2, characterized in that: The side wall of the fourth lifting tube (302) is fixedly provided with two L-shaped plates (3010) distributed up and down, the vertical plate of the L-shaped plate (3010) is perpendicular to and fixedly connected to the side wall of the fourth lifting tube (302), and the parallel plate of the L-shaped plate (3010) is parallel to the side wall of the fourth lifting tube (302); the two guide members (305) are respectively located on the side of the two L-shaped plates (3010) that are away from each other, and the guide members (305) are rotatably arranged between the side wall of the fourth lifting tube (302) and the parallel plate of the L-shaped plate (3010) through a rotating shaft (3011), and the two L-shaped plates (3010) are located inside the flexible member (306).

4. A lifting mechanism according to claim 1, characterized in that: The flexible member (306) is a steel wire rope.

5. A lifting mechanism according to claim 1, characterized in that: A nut (308) is provided at the top end of the fourth lifting tube (302), the middle part of the screw rod (301) is threadedly connected to the nut (308), and a support block (309) is provided at the bottom end of the screw rod (301), and the bottom end of the screw rod (301) is rotatably matched with the fourth lifting tube (302) through the support block (309).

6. A lifting mechanism according to any one of claims 1 to 5, characterized in that: The lifting mechanism further comprises a first lifting tube (201), a second lifting tube (202), and a third lifting tube (203) extending vertically, wherein the second lifting tube (202) is movably arranged inside the first lifting tube (201), and the third lifting tube (203) is movably arranged inside the second lifting tube (202); the lifting drive mechanism (3) is arranged inside the third lifting tube (203), another connecting block (307) is connected and fixed to the inner wall of the third lifting tube (203), the fourth lifting tube (302) is connected and fixed to the second lifting tube (202), and the lifting rod (303) is connected and fixed to the first lifting tube (201).

7. A lifting mechanism according to claim 6, characterized in that: The connecting block (307) is provided with two first positioning columns (3012) and a first screw hole (3013), the top of the lifting rod (303) is provided with two first positioning holes (3014) and a first connecting hole (3015), and the bottom of the third lifting tube (203) is provided with two second positioning holes (3016) and a second connecting hole (3017); one of the connecting blocks (307) is respectively positioned, matched and screwed with the two first positioning holes (3014) and the first connecting hole (3015) of the lifting rod (303) through the two first positioning columns (3012) and the first screw hole (3013), and the other connecting block (307) is respectively positioned, matched and screwed with the two second positioning holes (3016) and the second connecting hole (3017) of the third lifting tube (203) through the two first positioning columns (3012) and the first screw hole (3013).

8. A lifting mechanism according to claim 6, characterized in that: The bottom end of the fourth lifting tube (302) is provided with a second screw hole (3018), the bottom end of the lifting rod (303) is provided with a third screw hole (3019), the bottom end of the second lifting tube (202) is provided with a first connecting plate (204), the bottom end of the first lifting tube (201) is provided with a second connecting plate (205), the bottom end of the fourth lifting tube (302) is screwed and fixed to the first connecting plate (204) through the second screw hole (3018), and the bottom end of the lifting rod (303) is screwed and fixed to the second connecting plate (205) through the third screw hole (3019).

9. A lifting table, comprising a table top (1), characterized in that: The bottom of the table top (1) is provided with two table legs (2) capable of lifting and lowering, and the table legs (2) are the lifting mechanism according to any one of claims 6 to 8; The top of the third lifting tube (203) is fixedly connected to the bottom of the table top (1), and the top of the screw rod (301) is rotatably connected to the bottom of the table top (1) via a bearing (304).

10. The lifting table according to claim 9, characterized in that: Two assembly boxes (6) are respectively provided between the table top (1) and the two table legs (2); the bottom wall of the assembly box (6) is connected and fixed to the bearing (304); the bottom wall of the assembly box (6) is connected and fixed to the top of the third lifting tube (203); the top of the screw rod (301) passes through the bottom wall of the assembly box (6) upwards; a motor (601) is provided inside the assembly box (6); the motor (601) is transmission-connected to the top of the screw rod (301).

Images