High-stability clearance compensation square tube lifting stand column

Abstract

The utility model relates to the technical field of electric stand columns, in particular to a high-stability clearance compensation square pipe lifting stand column which comprises a lead screw and a power box, the upper end of the lead screw is in threaded connection with a first pipe fitting, a motor is fixedly installed in the power box, the output end of the motor is fixedly connected with the lower end of the lead screw, and the lower end of the first pipe fitting is fixedly connected with a fixing block. The upper end of the power box is fixedly connected with a protective shell, the inner side of the protective shell is sleeved with a second pipe fitting, the lower end of the second pipe fitting is sleeved with a guide rod, the inner wall of the second pipe fitting is provided with a guide rail, a buckling groove is formed in the guide rail, and the upper end of the protective shell is rotationally connected with a turning plate through a rotating shaft. A limiting frame is fixedly installed on the inner wall of the protective shell. Cover grooves are formed in the two sides of the upper end of the protective shell. The device has the beneficial effects that the lead screw drives the first pipe fitting to ascend, and when the first pipe fitting ascends to a certain height, the buckle is buckled with the buckle groove, so that the middle of the first pipe fitting is supported, and meanwhile, the second pipe fitting is also supported.

Description

Technical Field

[0001] The utility model relates to the technical field of electric columns, in particular to a high-stability gap-compensating square pipe lifting column. Background Technique

[0002] Electric column lifters are widely used in fields such as home and medical treatment. The column lifter generally includes an inner tube, a middle tube, an outer tube and a driving device that are sleeved from the inside out in sequence. In order to ensure the strength and stiffness of the column lifter, the sleeve is generally made of metal material.

[0003] Chinese Patent CN209977007U discloses a lifting column, which includes a lead screw and a sleeve sleeved outside the lead screw. One end of the sleeve is threadedly connected to the lead screw, and the other end is provided with an end cap. One end of the lead screw close to the end cap is provided with an elastic sliding ring to prevent shaking between the lead screw and the sleeve. The elastic sliding ring includes a positioning ring sleeved on the lead screw and multiple groups of elastic claws arranged on the positioning ring. In the utility model, the elastic sliding ring changes its own shape in the sleeve with the change of the inner diameter of the sleeve, so that the elastic sliding ring and the sleeve always maintain a tight fit state, preventing the moving sleeve from shaking and also preventing the phenomenon of pipe beating.

[0004] However, the above patent uses a two-stage driving method. When the sleeve rises to the highest point, the sleeve and the lead screw are unstable, the support points of the sleeve are few, and there is no support point in the middle position, making the sleeve and the lead screw easy to twist and not durable. Therefore, the utility model proposes a high-stability gap-compensating square pipe lifting column to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a high-stability gap-compensating square pipe lifting column to solve the problem that the sleeve and the lead screw are easy to twist when the sleeve rises to the highest point as mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A high-stability gap-compensating square pipe lifting column, including: a lead screw and a power box. The upper end of the lead screw is threadedly connected with a first pipe fitting. A motor is fixedly installed in the power box, and the output end of the motor is fixedly connected with the lower end of the lead screw. The lower end of the first pipe fitting is fixedly connected with a fixing block, and buckles are fixedly installed on both sides of the fixing block. The upper end of the power box is fixedly connected with a protective shell. The inner side of the protective shell is sleeved with a second pipe fitting. The lower end of the second pipe fitting is sleeved with a guide rod. A guide rail is opened on the inner wall of the second pipe fitting, and a buckle groove is opened in the guide rail. The upper end of the protective shell is rotationally connected with a flip plate through a rotating shaft. A limiting frame is fixedly installed on the inner wall of the protective shell, and cover grooves are opened on both sides of the upper end of the protective shell.

[0007] Preferably, the upper end of the guide rod has a limiting disc, the lower end of the guide rod is fixedly connected with the power box, and the rotating shaft is rotationally connected with the protective shell.

[0008] Preferably, the initial state of the buckle is a compressed state by the fixed block and the inner wall of the guide rail. The buckle is located between the limit frame and the guide rail, and the length of the lower end of the buckle is equal to the buckle groove.

[0009] Preferably, the length of the screw rod is greater than the sum of the first pipe fitting and the second pipe fitting.

[0010] Preferably, the screw rod passes through the fixed block and the bottom end of the first pipe fitting.

[0011] Preferably, the length of the flap is greater than the length of the cover groove, and initially contacts the upper end of the second pipe fitting.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: The first pipe fitting is driven to rise by the screw rod. When it rises to a certain height, the buckle is buckled with the buckle groove, so that there is support in the middle of the first pipe fitting, and at the same time, the second pipe fitting will also be supported. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a three-dimensional schematic diagram of the overall structure of the present utility model;

[0014] Figure 2 is a cross-sectional schematic diagram of the overall structure of the present utility model;

[0015] Figure 3 is the present utility Figure 2 magnified view of the structure of area A;

[0016] Figure 4 is a three-dimensional schematic diagram of the first pipe fitting of the present utility model;

[0017] Figure 5 is a bottom view of the second pipe fitting of the present utility model.

[0018] In the figure: 1, the first pipe fitting; 2, the second pipe fitting; 3, the protective shell; 4, the power box; 5, the motor; 6, the screw rod; 7, the flap; 8, the rotating shaft; 9, the buckle groove; 10, the guide rail; 11, the fixed block; 12, the buckle; 13, the cover groove; 14, the limit frame; 15, the guide rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to clearly and completely describe the objectives, technical solutions of the present utility model and make the advantages more clear, the following further details the embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present utility model, rather than all of the embodiments, and are only used to explain the embodiments of the present utility model, not to limit the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0020] Please refer toFigures 1 to 5 , the present utility model provides a technical solution: a high-stability gap-compensating square pipe lifting column, including: a lead screw 6 and a power box 4. The upper end of the lead screw 6 is threadedly connected to a first pipe fitting 1. A motor 5 is fixedly installed in the power box 4. The power box 4 facilitates the placement and protection of the motor 5. The output end of the motor 5 is fixedly connected to the lower end of the lead screw 6. The motor 5 can drive the lead screw 6 to rotate. The lower end of the first pipe fitting 1 is fixedly connected to a fixing block 11. Since the fixing block 11 is square, it will not rotate in the second pipe fitting 2. Clasps 12 are fixedly installed on both sides of the fixing block 11. The clasps 12 are in an initial state of being compressed by the fixing block 11 and the inner wall of the guide rail 10. When the fixing block 11 drives the clasps 12 to move up to the buckle groove 9, the clasps 12 will pop out and be buckled in the buckle groove 9. The clasps 12 are located between the limit frame 14 and the guide rail 10, making it easy for the clasps 12 to pop out. The length of the lower end of the clasps 12 is equal to that of the buckle groove 9. When the clasps 12 enter the buckle groove 9, the lower end will provide support for the first pipe fitting 1. The upper end of the power box 4 is fixedly connected to a protective shell 3. The protective shell 3 can provide guiding and limiting functions for the second pipe fitting 2 and can also protect the main components inside the device. A limit frame 14 is fixedly installed on the inner wall of the protective shell 3. The limit frame 14 can play a limiting role for the first pipe fitting 1.

[0021] The second pipe fitting 2 is sleeved inside the protective shell 3. The lower end of the second pipe fitting 2 is sleeved with a guide rod 15. Among them, there is a limit disk at the upper end of the guide rod 15. The rising height of the second pipe fitting 2 can be effectively controlled through the limit disk and the guide rod 15. The lower end of the guide rod 15 is fixedly connected to the power box 4 to stabilize the position of the guide rod 15. A guide rail 10 is provided on the inner wall of the second pipe fitting 2. The clasps 12 are located inside the guide rail 10. A buckle groove 9 is provided in the guide rail 10. The upper end of the protective shell 3 is rotatably connected to a rotating shaft 8. The rotating shaft 8 is rotatably connected to a flap 7. Cover grooves 13 are provided on both sides of the upper end of the protective shell 3. The cover grooves 13 facilitate the flap 7 to return to its initial position. When the first pipe fitting 1 moves up to a certain height, the clasps 12 will be inserted into the buckle groove 9, and then drive the second pipe fitting 2 to move up. During the upward movement of the second pipe fitting 2, the flap 7 will slightly turn up at an acute angle. When the second pipe fitting 2 moves down, the flap 7 will abut against the lower end of the clasps 12 and squeeze the clasps 12 inward, causing the clasps 12 to disengage from the buckle groove 9.

[0022] The length of the lead screw 6 is greater than the sum of the first pipe fitting 1 and the second pipe fitting 2. The lead screw 6 passes through the fixing block 11 and the bottom end of the first pipe fitting 1, which is conducive to the full extension of the first pipe fitting 1 and the second pipe fitting 2.

[0023] The length of the flap 7 is greater than the length of the cover groove 13, and it initially contacts the upper end of the second pipe fitting 2, so that the flap 7 can successfully abut against the lower end of the clasps 12.

[0024] When the device is working, start the motor 5 in the power box 4. Drive the lead screw 6 to rotate through the motor 5. Due to the action of the fixed block 11, the first pipe fitting 1 will not rotate but will move upward. When the first pipe fitting 1 moves upward to a certain height, the buckle 12 pops out and snaps into the buckle groove 9, and then drives the second pipe fitting 2 to move upward. When reaching the specified height, the motor 5 stops rotating. At this time, the first pipe fitting 1 and the second pipe fitting 2 support each other through the buckle 12, and the first pipe fitting 1 is also supported by the lead screw 6. When it is necessary to lower, reverse the motor 5, and the lead screw 6 rotates accordingly. The second pipe fitting 2 and the first pipe fitting 1 move downward together. When the buckle 12 moves to the flap 7, the buckle 12 is squeezed back into the guide rail 10, and then the first pipe fitting 1 and the second pipe fitting 2 continue to move downward, and the device returns to the initial position.

[0025] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. High stability gap compensation square tube lifting column, characterized by: The high-stability gap compensation square tube lifting column comprises: a screw rod (6) and a power box (4); the upper end of the screw rod (6) is threadedly connected to a first pipe member (1); a motor (5) is fixedly installed in the power box (4); the output end of the motor (5) is fixedly connected to the lower end of the screw rod (6); the lower end of the first pipe member (1) is fixedly connected to a fixing block (11); buckles (12) are fixedly installed on both sides of the fixing block (11); the upper end of the power box (4) is fixedly connected to a protective shell (3); the inner side of the protective shell (3) is sleeved with a second pipe member (2); the lower end of the second pipe member (2) is sleeved with a guide rod (15); the inner wall of the second pipe member (2) is provided with a guide rail (10); a buckle groove (9) is provided in the guide rail (10); the upper end of the protective shell (3) is rotatably connected to a flap (7) via a rotating shaft (8); a limit frame (14) is fixedly installed on the inner wall of the protective shell (3); and cover grooves (13) are provided on both sides of the upper end of the protective shell (3).

2. The high stability gap compensation square tube lifting column according to claim 1 is characterized in that: The upper end of the guide rod (15) is provided with a limit plate, the lower end of the guide rod (15) is fixedly connected to the power box (4), and the rotating shaft (8) is rotatably connected to the protective shell (3).

3. The high stability gap compensation square tube lifting column according to claim 1 is characterized by: The buckle (12) is initially in a compressed state by the fixing block (11) and the inner wall of the guide rail (10), the buckle (12) is located between the limit frame (14) and the guide rail (10), and the length of the lower end of the buckle (12) is equal to the buckle slot (9).

4. The high stability gap compensation square tube lifting column according to claim 1 is characterized in that: The length of the screw rod (6) is greater than the sum of the lengths of the first pipe member (1) and the second pipe member (2).

5. The high stability gap compensation square tube lifting column according to claim 1 is characterized in that: The screw rod (6) passes through the fixing block (11) and the bottom end of the first pipe member (1).

6. The high stability gap compensation square tube lifting column according to claim 1 is characterized in that: The flap (7) has a length greater than that of the cover groove (13) and is initially in contact with the upper end of the second pipe member (2).

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