Lifting stabilizing structure and tripod

Abstract

The utility model relates to the technical field of laser instrument supporting equipment, in particular to a lifting stabilizing structure and a tripod, the stabilizing structure comprises a lifting pipe, an inner channel of the lifting pipe is used for inserting a lead screw, the lifting pipe is inserted in a foundation sleeve, and an inner channel of the foundation sleeve is matched with the outline of the outer side wall of the lifting pipe. An internal channel of the lifting pipe is in clearance fit with the lead screw. The lifting pipe with the outer side wall matched with the internal channel of the foundation sleeve is arranged, it is guaranteed that all the radial positions of the lifting pipe make sliding contact with the foundation sleeve, the lead screw is in clearance fit with the internal channel of the lifting pipe, the lead screw material flow can be limited by the lifting pipe when shaking in any direction, and therefore the lead screw is prevented from shaking; meanwhile, the lifting pipe is inserted into the basic sliding sleeve, the basic sleeve can limit the displacement of the lifting pipe in the radial direction no matter the lifting pipe rises, shaking and deflection of the lifting pipe during lifting are avoided, and the stability of the lifting pipe for supporting the laser instrument is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of laser instrument support equipment technology, specifically providing a lifting and stabilizing structure and a tripod. Background Technology

[0002] Laser instruments, including laser levels, laser scanning instruments, and laser line projectors, are used in everyday life for renovation and decoration projects. These laser measuring instruments are typically equipped with tripods or other support devices to hold and secure them in place.

[0003] Traditional tripods supporting laser instruments typically involve manually adjusting the height of the lifting rod using a worm gear mechanism. Since some laser instruments require manual observation and adjustment, manual height adjustment is time-consuming, labor-intensive, and prone to errors. Currently, there are electric tripods on the market that use a motor to drive gears and control the lifting rod with a meshing rack. While these tripods can automatically adjust the height of the lifting rod, the low precision of the rack and pinion drive's stroke control still cannot guarantee the measurement accuracy of laser instruments.

[0004] Therefore, relevant research institutions proposed using ball screws and screw-nut drives to replace existing gear and rack drives to improve accuracy. Traditional ball screws have a support structure at at least both ends to ensure stability during rotation. However, in a tripod, one end of the ball screw needs to support the extension and retraction of the lifting rod connected to the screw-nut, making it impossible to install a support structure. Support and positioning can only be provided at the end with the motor. Furthermore, to better transmit force and further reduce errors, the ball screw and motor output end are coaxially coupled via a coupling. Therefore, even a slight misalignment between the ball screw and motor coaxiality can cause the screw to wobble easily during rotation, reducing the accuracy of the screw-nut lifting stroke. Prolonged wobble can also loosen the coupling connection, exacerbating the wobble, increasing errors, and even damaging components such as the motor, thus defeating the original purpose of using ball screws and screw-nut drives to improve accuracy. Utility Model Content

[0005] To address the aforementioned issues, this invention provides a lifting structure and tripod that enables more stable lifting transmission and higher height adjustment accuracy for a lead screw driven tripod.

[0006] The technical solution of this utility model is as follows:

[0007] A lifting and stabilizing structure includes a lifting tube, an internal channel of which is used to insert a lead screw. The lifting tube is inserted into a base sleeve, the internal channel of the base sleeve is adapted to the contour of the outer wall of the lifting tube, and the internal channel of the lifting tube is clearance-fitted with the lead screw.

[0008] In this scheme, even if the lead screw tends to wobble, the contour of the outer wall of the lifting tube matches the shape of the internal channel of the base sleeve, ensuring that all radial parts of the lifting tube slide in contact with the base sleeve. Since the radial wobble of the lifting tube itself is restricted by the base sleeve, and the upper part of the lead screw is always inserted into the lifting tube, the wobble of the lead screw can be limited by reducing the inner diameter of the lifting tube. That is, through the clearance fit between the internal channel of the lifting tube and the lead screw, the lead screw's rotation is not affected, and the wobble of the lead screw can be limited by the lifting tube. This improves the transmission accuracy of the lead screw and also avoids the failure of the fit between the lead screw and the coupling due to long-term wobble.

[0009] Because the motor is located below the lead screw, the torque generated by the motor causes the lead screw to rotate, overcoming the weight of the lead screw nut, the lifting tube connected to the lead screw nut, and the laser instrument to achieve raising and lowering. However, the lifting tube is generally made of metal, and the internal channel of the lifting tube is clearance-fitted with the diameter of the lead screw, while the outer wall must be adapted to the inner diameter of the base sleeve. This results in a thicker lifting tube, leading to a larger weight and increasing the load on the motor when it rotates. To reduce the load on the motor, preferably, the lifting tube includes an inner tube and an outer tube arranged coaxially. The inner tube forms the internal channel of the lifting tube, and the outer tube forms the outer wall of the lifting tube.

[0010] In this solution, by setting the lifting pipe as a two-layer nested inner and outer pipe structure with hollow inner and outer pipes, the weight of the lifting pipe itself can be greatly reduced, the motor load can be reduced, and the production cost can also be reduced.

[0011] Preferably, connecting plates are evenly arranged between the inner and outer pipes, and the inner and outer pipes are fixedly connected by the connecting plates. The evenly arranged connecting plates can transmit the force on the inner pipe to the outer pipe, and then from the outer pipe to the base sleeve. Therefore, any swaying of the lead screw, after being transmitted to the inner pipe, can be transmitted back to the outer pipe by the connecting plates, effectively reducing the amplitude of lead screw swaying while also improving the strength of the lifting pipe.

[0012] Preferably, the bottom of the inner tube is higher than the bottom of the outer tube, the outer tube is fixedly sleeved on the outside of the nut sleeve, and the top of the inner tube is flush with the top of the outer tube.

[0013] In this design, the bottom of the inner tube is higher than the bottom of the outer tube, providing space for inserting the nut sleeve at the bottom of the lifting tube. The outer tube is then fitted over the nut sleeve, and the presence of the inner tube eliminates concerns about excessive insertion depth of the nut sleeve. Meanwhile, the top of the lifting tube is flush with the outer tube, providing an installation surface for the connecting plate of the laser instrument.

[0014] When a lead screw nut sleeve is inserted into a lifting pipe, an interference fit is typically chosen between the lead screw nut sleeve and the lifting pipe. However, an interference fit makes manual installation and disassembly of the lifting pipe and the nut sleeve very difficult. Therefore, preferably, the outer pipe has an internal thread on its inner wall that is lower than the inner pipe, and the nut sleeve has an external thread. The outer pipe and the nut sleeve are threaded together. By threading the lifting pipe and the nut sleeve together, the connection strength of the two is ensured, while also facilitating quick installation, connection, disassembly, and maintenance.

[0015] Preferably, a through hole is provided on the side wall above the lifting tube, penetrating the inner tube and the outer tube. An instrument connecting screw is inserted into the top of the inner tube, and the through hole is used to insert a positioning pin to lock the instrument connecting screw laterally.

[0016] In this design, an instrument connection screw is installed at the top of the inner tube to facilitate the connection of subsequent laser instruments. At the same time, the instrument connection screw can also seal the inner tube to prevent dust and impurities from entering the inner tube and affecting the rotation of the lead screw.

[0017] Preferably, the inner wall of the base sleeve is provided with a slide rail along the tube axis, and multiple slide rails are arranged in a circumferential array along the axis of the base sleeve. The outer tube is provided with a sliding groove adapted to the slide rail. The slide rail is inserted into the sliding groove on the outer tube, which can prevent the rotation of the lead screw from causing the lifting tube and the lead screw nut to rotate, allowing the lifting tube to rise and fall with the rotation of the lead screw.

[0018] Preferably, when a laser instrument is installed on the top working end of the lifting tube, it needs to be connected to the control element at the motor. Since the wiring is easily damaged by external factors, internal wiring is required. Therefore, each of the slide rails has a through groove along its length. The through groove can be used for wiring, ensuring unobstructed wiring while also providing some constraint on the wires, preventing them from being exposed and avoiding interference from the working of the lead screw and other structures during lifting.

[0019] A tripod includes a connecting base and retractable legs, the legs being connected to the connecting base. It includes the aforementioned lifting and stabilizing structure. The upper end of a base sleeve is connected to the connecting base. The tripod also includes a lead screw and a lead screw nut adapted to the lead screw. The lead screw passes through the lifting tube, and the lead screw nut is fixedly installed in a nut sleeve. The upper end of the lifting tube extends out of the connecting base. Furthermore, it includes a motor connected to the lead screw drive, which drives the lifting tube to rise and fall. By incorporating the aforementioned lifting and stabilizing structure, the tripod ensures the accuracy of the ball screw controlling the lifting tube's movement, preventing the lead screw from wobbling within the tripod and thus avoiding reduced accuracy.

[0020] Preferably, the output end of the motor is coaxially connected to the lead screw via a coupling. This coaxial connection between the motor and the lead screw ensures that the accuracy of the lead screw transmission is effectively improved.

[0021] The beneficial effects of this utility model are:

[0022] This invention features a lifting tube whose outer wall is adapted to the internal channel of the base sleeve. This ensures that the lifting tube slides in contact with the base sleeve at all radial points. The lead screw and the internal channel of the lifting tube are fitted with a clearance, so that any swaying of the lead screw in any direction is restricted by the lifting tube, thus preventing the lead screw from swaying. At the same time, when the lifting tube is inserted into the base sliding sleeve, the base sleeve radially restricts the displacement of the lifting tube regardless of its height, preventing the lifting tube from swaying or tilting during lifting and ensuring the stability of the lifting tube supporting the laser instrument. Attached Figure Description

[0023] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the lead screw lifting structure of this utility model;

[0025] Figure 2 This is a three-dimensional half-sectional view of the lifting pipe of this utility model;

[0026] Figure 3 This utility model Figure 1 Sectional view of AA.

[0027] 1-Screw rod, 2-Screw rod nut, 3-Nut sleeve, 4-Lifting tube, 401-Inner tube, 402-Outer tube, 403-Connecting plate, 404-Through hole, 405-Slide groove, 406-Through groove, 5-Foundation sleeve, 501-Slide rail, 6-Instrument connecting screw, 7-Connecting disc, 8-Motor, 9-Coupling. Detailed Implementation

[0028] The technical solution of the present invention will be clearly and completely described in conjunction with the accompanying drawings and through specific implementation methods of the embodiments of the present invention.

[0029] Example 1:

[0030] A lifting and stabilizing structure, such as Figure 1 and Figure 2 As shown, it includes a lifting tube 4, the internal channel of which is used to insert a lead screw 1. The lifting tube 4 is inserted into a base sleeve 5, and the internal channel of the base sleeve 5 is adapted to the outer contour of the outer wall of the lifting tube 4. The internal channel of the lifting tube 4 is clearance-fitted with the lead screw 1.

[0031] Specifically, since the base sleeve 5 is placed on the outermost layer, it can connect to the tripod legs, serving as a fixed foundation and also protecting the internal components from dust. Meanwhile, the lifting tube 4 needs to be fixedly connected to the lead screw nut 2, so that the lead screw nut 2, when rotating and rising with the lead screw 1, drives the lifting tube 4 to rise and fall. The lifting tube 4 is arranged parallel to the lead screw 1, and can be arranged as a rod structure beside the lead screw 1, or as a tube structure coaxial with the lead screw 1. In this embodiment, to improve space utilization, reduce the size of the external base sleeve 5, and improve the transmission accuracy of the motor 8, a lifting tube 4 coaxial with the lead screw 1 is preferably used. The internal channel of the base sleeve 5 is adapted to the outer contour of the outer wall of the lifting tube 4, meaning that the contour of the internal channel of the base sleeve 5 matches the partial contour of the lifting tube 4. This ensures that the minimum width of the inner tube of the base sleeve 5 is greater than or equal to the maximum width of the lifting tube 4, allowing the base sleeve 5 to fit over the lifting tube 4. In some embodiments, the lifting tube 4 is allowed to slide in contact with the base sleeve 5 at all radial points. Preferably, the lifting tube 4 is a circular tube with a circular outer wall, and the inner channel of the base sleeve is also a cylindrical channel, allowing for better fit. For the lifting tube 4, once inserted into the base sliding sleeve, the base sleeve 5 can radially restrict the displacement of the lifting tube 4 regardless of its height, thereby ensuring the stability of the lifting tube 4 in supporting the laser instrument. Since the radial sway of the lifting tube 4 is restricted by the base sleeve 5, and the top of the lead screw 1 is always inserted in the lifting tube 4, the sway of the lead screw 1 can be restricted by reducing the inner diameter of the lifting tube 4. Through the clearance fit between the inner diameter of the lifting tube 4 and the outer wall of the lead screw 1, the rotation of the lead screw 1 is not affected. Even if the lead screw 1 sways, it can be limited by the lifting tube 4. This improves the transmission accuracy of the lead screw 1 and avoids the failure of the fit between the lead screw 1 and the coupling 9 due to long-term sway.

[0032] Furthermore, because the motor 8 is located below the lead screw 1, the torque generated by the motor 8 causes the lead screw 1 to rotate, overcoming the gravity of the lead screw nut 2, the lifting tube 6 connected to the lead screw nut 2, and the laser instrument to achieve raising and lowering. However, the lifting tube 4 is generally made of metal, and its inner diameter matches the lead screw 1's diameter, while its outer diameter matches the inner diameter of the base sleeve 5. This results in a thicker lifting tube 4 with a greater weight, increasing the load on the motor 8 during rotation. To reduce the load on the motor 8, such as... Figures 1 to 3 As shown, the lifting pipe 4 includes an inner pipe 401 and an outer pipe 402 arranged coaxially. The diameter of the inner pipe 401 is adapted to the diameter of the lead screw 1, and the diameter of the outer pipe 402 is adapted to the diameter of the foundation sleeve 5.

[0033] Specifically, such as Figure 3As shown, by setting the lifting pipe 4 as a two-layer nested inner and outer pipe 402 structure, with the inner and outer pipes 402 being hollow, the weight of the lifting pipe 4 itself can be greatly reduced, the load on the motor 8 can be reduced, and the manufacturing cost can also be reduced. Meanwhile, connecting plates 403 are evenly arranged between the inner pipe 401 and the outer pipe 402, and the inner pipe 401 and the outer pipe 402 are fixedly connected by the connecting plates 403. Through the evenly arranged connecting plates 403, the force on the inner pipe 401 can be transmitted to the outer pipe 402, and then from the outer pipe 402 to the base sleeve 5. At least two connecting plates 403 are provided, but the figure in this embodiment only shows the structure with two connecting plates 403. Three or four connecting plates 403 can also be provided, so that any swaying of the lead screw 1, after being transmitted to the inner pipe 401, can be transmitted to the outer pipe 402 by the connecting plates 403, effectively reducing the swaying amplitude of the lead screw 1 and also improving the structural strength of the lifting pipe 4.

[0034] After the lifting tube 4 is divided into an inner tube 401 and an outer tube 402, the lead screw nut 2 is set in the nut sleeve 3. The bottom of the inner tube 401 is higher than the bottom of the outer tube 402. The outer tube 402 is fixedly sleeved on the outside of the nut sleeve 3, and the top of the inner tube 401 is flush with the top of the outer tube 402. The bottom of the inner tube 401 being higher than the bottom of the outer tube 402 provides space for the bottom of the lifting tube 4 to be inserted into the nut sleeve 3. The outer tube 402 is sleeved on the nut sleeve 3. Due to the presence of the inner tube 401, there is no need to worry about the nut sleeve 3 being inserted too deeply. The top of the lifting tube 4 being flush provides an installation surface for the connecting plate 7 of the laser instrument.

[0035] In this system, the lead screw nut 2 is inserted into the lifting tube 4. Generally, the lead screw nut 2 is selected to be interference-fitted with the lifting tube 4, and the two are connected by friction. However, the interference fit makes it very difficult to manually install and disassemble the lifting tube and the nut sleeve 3. Therefore, the outer tube 402 is provided with an internal thread on the wall of the inner tube 401, which is lower than the inner tube 401, and the nut sleeve 3 is provided with an external thread. The outer tube 402 is threadedly connected to the nut sleeve 3. By threading the lifting tube 4 and the nut sleeve 3, the connection strength of the two is ensured, and it is also convenient for quick installation, connection, disassembly and maintenance.

[0036] Furthermore, such as Figure 1 and Figure 2 As shown, a through hole 404 is provided on the side wall above the lifting tube 4, penetrating the inner tube 401 and the outer tube 402. An instrument connecting screw 6 is inserted into the top of the inner tube 401, and the through hole 404 is used to insert a positioning pin to lock the instrument connecting screw 6 laterally. By providing an instrument connecting screw 6 at the top of the inner tube 401, it is convenient to connect the laser instrument laterally. At the same time, the instrument connecting screw 6 can also seal the inner tube 401 to prevent dust and impurities from entering the inner tube 401 and affecting the rotation of the lead screw 1.

[0037] Furthermore, the inner wall of the base sleeve 5 is provided with slide rails 501 along the tube axis. Multiple slide rails 501 are arranged in a circumferential array along the axis of the base sleeve 5. At least two slide rails 501 are provided; in this embodiment, four are provided to ensure that the sidewalls of the outer tube 402 are all limited and guided by the slide rails 501. The outer tube 402 is provided with a groove 405 that matches the slide rails 501. The slide rails 501 are inserted into the grooves 405 on the outer tube 402, preventing the rotation of the lead screw 1 from causing the lifting tube 4 and the lead screw nut 2 to rotate as well, allowing the lifting tube 4 to rise and fall with the rotation of the lead screw 1. It should be noted that since the outer tube 402 of the lifting tube 4 can be connected to the lead screw nut 2 via threads, when installing the tripod, the lifting tube 4 must be threadedly connected to the nut sleeve 3 before installing the base sleeve.

[0038] Furthermore, when a laser instrument is installed on the top working end of the lifting tube 4, it needs to be connected to the control element at the motor 8. External wiring is easily damaged, necessitating internal wiring. Therefore, each slide rail 501 is provided with a through groove 406 along its length. The through groove 406 can be used for wiring, ensuring unobstructed wiring while also providing some constraint on the wires, preventing them from being exposed and avoiding interference from the operation of the lead screw 1 and other structures during lifting.

[0039] Example 2:

[0040] A tripod includes a connecting base and retractable legs, the legs being connected to the connecting base. It includes the aforementioned lifting and stabilizing structure. The upper end of the base sleeve 5 is connected to the connecting base. The tripod also includes a lead screw 1 and a lead screw nut 2 adapted to the lead screw 1. The lead screw 1 passes through the lifting tube 6, and the lead screw nut 2 is fixedly installed in a nut sleeve 3. The upper end of the lifting tube 6 extends out of the connecting base. Furthermore, it includes a motor 8 connected to the lead screw 1 for driving the lifting tube 6 to rise and fall. By incorporating the aforementioned lifting and stabilizing structure, the tripod ensures the accuracy of the ball screw controlling the rise and fall of the lifting tube 6, avoiding the problem of reduced accuracy caused by the lead screw wobbling within the tripod.

[0041] Furthermore, the output end of the motor 8 is coaxially connected to the lead screw 1 via a coupling 9. The coaxial connection between the motor and the lead screw ensures that the accuracy of the lead screw transmission is effectively improved.

[0042] In this embodiment, a tripod with the above-mentioned lifting and stabilizing structure is provided to ensure the accuracy of the ball screw 1 in controlling the lifting tube 6, and to avoid the problem of reduced accuracy caused by the ball screw 1 shaking when placed in the tripod.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A lifting and stabilizing structure, characterized in that, Includes a lifting tube (4), the internal channel of the lifting tube (4) is used to insert a lead screw (1), the lifting tube (4) is inserted in a base sleeve (5), the internal channel of the base sleeve (5) is adapted to the outer wall contour of the lifting tube (4), and the internal channel of the lifting tube (4) is clearance-fitted with the lead screw (1).

2. The lifting and stabilizing structure according to claim 1, characterized in that, The lifting tube (4) includes an inner tube (401) and an outer tube (402) arranged coaxially. The inner tube (401) forms the internal channel of the lifting tube (4), and the outer tube (402) forms the outer wall of the lifting tube (4).

3. The lifting and stabilizing structure according to claim 2, characterized in that, A connecting plate (403) is evenly arranged between the inner tube (401) and the outer tube (402), and the inner tube (401) and the outer tube (402) are fixedly connected by the connecting plate (403).

4. The lifting and stabilizing structure according to claim 2, characterized in that, The bottom of the inner tube (401) is higher than the bottom of the outer tube (402), the outer tube (402) can be fitted over the nut sleeve (3), and the top of the inner tube (401) is flush with the top of the outer tube (402).

5. The lifting and stabilizing structure according to claim 4, characterized in that, The outer tube (402) is lower than the inner tube (401) and has an internal thread on its wall. The nut sleeve (3) has an external thread, and the outer tube (402) is threadedly connected to the nut sleeve (3).

6. The lifting and stabilizing structure according to claim 4, characterized in that, A through hole (404) is provided on the side wall above the lifting tube (4) to pass through the inner tube (401) and the outer tube (402). An instrument connecting screw (6) is inserted into the top of the inner tube (401). The through hole (404) is used to insert a positioning pin to lock the instrument connecting screw (6) laterally.

7. The lifting and stabilizing structure according to claim 2, characterized in that, The inner wall of the base sleeve (5) is provided with a slide rail (501) along the tube axis. Multiple slide rails (501) are arranged in a circumferential array along the axis of the base sleeve (5). The outer tube (402) is provided with a slide groove (405) that is adapted to the slide rail (501).

8. The lifting and stabilizing structure according to claim 7, characterized in that, Each of the slide rails (501) has a through groove (406) along its length.

9. A tripod, comprising a connecting base and retractable legs, the legs being connected to the connecting base, characterized in that, It also includes a lifting and stabilizing structure as described in any one of claims 1 to 8, further including a lead screw (1) and a lead screw nut (2) adapted to the lead screw (1), the upper end of the base sleeve (5) is connected to the connecting seat, the lead screw (1) passes through the lifting tube (4), the lead screw nut (2) is fixedly installed in the nut sleeve (3), and the upper end of the lifting tube (4) extends out of the connecting seat; it also includes a motor (8) that is drivenly connected to the lead screw (1), the motor (8) being used to drive the lifting tube (4) to lift.

10. A tripod according to claim 9, characterized in that, The output end of the motor (8) is coaxially connected to the lead screw (1) via a coupling (9).

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