Electric lifting rod

Abstract

The utility model discloses an electric lifting rod which comprises a bottom plate, an outer cylinder, a plurality of multi-section telescopic mechanisms, end telescopic mechanisms and a lifting driving mechanism, the bottom end of the outer cylinder is installed on the bottom plate, each multi-section telescopic mechanism comprises a middle cylinder, each end telescopic mechanism comprises an inner cylinder, and the multiple multi-section telescopic mechanisms are installed on the bottom plate. The middle cylinders of the multiple sections of telescopic mechanisms are sequentially connected in a telescopic and sleeved mode from large pipe diameter to small pipe diameter, the middle cylinder with the largest pipe diameter is arranged in the outer cylinder in a telescopic mode, the inner cylinder is arranged in the middle cylinder with the smallest pipe diameter in a telescopic mode, and the lifting driving mechanism comprises a driving lead screw which is rotationally arranged in the outer cylinder and extends to the middle cylinders and the inner cylinder in the axial direction of the outer cylinder. The driving lead screw is used for driving the inner cylinder to synchronously stretch relative to the middle cylinder while driving the middle cylinder to stretch relative to the outer cylinder. The middle cylinders are sequentially telescopically sleeved, so that the inner cylinder can synchronously telescope relative to the middle cylinders while the middle cylinders telescope relative to the outer cylinder, and the telescopic device is compact in structure, large in telescopic ratio, high in telescopic efficiency and long in telescopic distance.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting drive, in particular to an electric lifting rod. Background Art

[0002] When inspection robots need to conduct close-range monitoring over a large area in some scenarios, such as monitoring numerous instruments in power plants, fixed camera pans cannot accurately monitor the exact values ​​of each instrument, especially pointer-type instruments. The camera must face the instrument to read accurately. The camera pan can read accurately with a lifting rod. The existing electric lifting rods generally have two types of drive structures. One is a cheap pneumatic lifting rod, which is lifted and lowered by gas pressure. However, since high-pressure gas is required, it needs to be equipped with an air pump. In addition, the sealing of the lifting rod has high requirements. The other is a lifting rod structure that uses a drive motor, a lead screw and a wire rope. The lead screw is driven by a drive motor and then linked to the wire rope for lifting and lowering. However, this type of lifting rod has a complex structure, a large device size, and is inconvenient to use. In addition, its telescopic structure is relatively small and the lifting range is limited. Utility Model Content

[0003] The utility model aims to provide an electric lifting rod with a compact structure and relatively large telescopic ratio, so as to solve the problems of the existing lifting rods proposed in the above background technology that have complex structures, relatively small telescopic ratios and limited lifting range.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] An electric lifting rod comprises a base plate, an outer tube, a multi-stage telescopic mechanism, an end telescopic mechanism and a lifting drive mechanism, wherein the bottom end of the outer tube is mounted on the base plate, the multi-stage telescopic mechanism comprises an intermediate tube, the end telescopic mechanism comprises an inner tube, and a plurality of multi-stage telescopic mechanisms are provided. The intermediate tubes of the plurality of multi-stage telescopic mechanisms are telescopically sleeved in sequence from large to small in diameter, the intermediate tube with the largest diameter is telescopically arranged in the outer tube, and the inner tube is telescopically arranged in the intermediate tube with the smallest diameter, and the lifting drive mechanism comprises an active screw rod which is rotatably arranged in the outer tube and extends axially along the outer tube to the intermediate tube and the inner tube, and the active screw rod is used to drive the intermediate tube to telescope relative to the outer tube while driving the inner tube to telescope synchronously relative to the intermediate tube.

[0006] Preferably, the multi-stage telescopic mechanism includes a first screw nut and a hollow screw. The first screw nut connected to the bottom end of the intermediate tube is threadedly sleeved on the active screw. The hollow screw located inside the intermediate tube is fixedly sleeved on the active screw. One end of the hollow screw is rotatably connected to the first screw nut, and the other end extends axially along the intermediate tube to the inside of the inner tube.

[0007] Preferably, the inner wall of the outer cylinder is provided with a plurality of first guide grooves along its axial direction, and the outer wall of the intermediate cylinder is provided with a plurality of first convex strips along its axial direction which fit in the first guide grooves.

[0008] Preferably, a plurality of second guide grooves are formed on the outer circumference of the active screw along its axial direction, and a second convex strip adapted to the plurality of second guide grooves is formed on the inner circumference of the hollow screw along its axial direction.

[0009] Preferably, the multi-stage telescopic mechanism includes a bearing, one end of the hollow screw is connected to a sleeve sleeved on the outer peripheral side of the first screw nut, and accordingly an annular cavity for accommodating the bearing is formed between the inner peripheral side of the sleeve and the outer peripheral side of the first screw nut.

[0010] Preferably, the first screw nut includes a seat body and a sleeve portion connected to the end surface of the seat body, the outer peripheral edge of the seat body is connected to the inner wall of the bottom end of the intermediate tube, and the bearing sleeve is arranged on the outer peripheral side of the sleeve portion.

[0011] Preferably, the end telescopic mechanism comprises a second screw nut connected to the bottom end of the inner tube, and the second screw nut is threadedly sleeved on the hollow screw.

[0012] Preferably, the inner circumferential wall of the intermediate cylinder is provided with a plurality of third guide grooves along its axial direction, and the outer circumferential wall of the inner cylinder is provided with third convex strips adapted to the plurality of third guide grooves along its axial direction.

[0013] Preferably, the top end surfaces of the outer tube and the middle tube are both provided with an annular stepped groove, and a sealing sleeve is embedded in the stepped groove.

[0014] Preferably, the lifting drive mechanism includes a servo motor, two bearing seats, a worm and a worm wheel. The servo motor and the two relatively arranged bearing seats are arranged on the bottom surface of the base plate facing away from the outer cylinder. The worm is rotatably mounted on the two bearing seats. The output shaft of the servo motor is transmission-connected to one end of the worm through a belt. The worm wheel meshing with the worm is fixedly mounted on one end of the active screw that passes through the base plate.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: by telescoping the intermediate cylinder in sequence, the intermediate cylinder can be telescoped relative to the outer cylinder while the inner cylinder can also be telescoped relative to the intermediate cylinder synchronously, that is, the intermediate cylinder extends outward relative to the inner cylinder while the inner cylinder also extends outward relative to the intermediate cylinder, which not only improves the telescopic efficiency, but also greatly increases the telescopic distance; when the electric lifting rod stops being used, the intermediate cylinder can be retracted into the outer cylinder while the inner cylinder can be retracted into the intermediate cylinder, making the entire structure compact, with a large telescopic ratio, small space occupation, and easy placement and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional diagram of the electric lifting rod of the utility model from the first viewing angle;

[0017] Figure 2 A perspective view of the electric lifting rod of the utility model from a second viewing angle;

[0018] Figure 3 This is a schematic diagram of the structure of the outer cylinder and the intermediate cylinder of the utility model;

[0019] Figure 4 It is a cross-sectional view of the electric lifting rod of the utility model;

[0020] Figure 5 for Figure 4 The enlarged view of point A in the middle;

[0021] Figure 6 This is a schematic diagram of the structure inside the outer cylinder of the utility model;

[0022] Figure 7 This is an exploded view of the multi-stage telescopic mechanism of the utility model;

[0023] Figure 8 It is a structural schematic diagram of the active screw rod and the hollow screw rod of the utility model;

[0024] Fig. 9 It is a structural schematic diagram of the first screw nut of the utility model.

[0025] The markings in the figure correspond to the following:

[0026] 1-bottom plate; 2-outer cylinder; 21-first guide groove; 3-multi-stage telescopic mechanism; 31-middle cylinder; 311-first convex strip; 312-third guide groove; 32-first screw nut; 321-seat body; 322-sleeve connection; 33-hollow screw; 331-second convex strip; 34-bearing; 35-sleeve; 4-end telescopic mechanism; 41-inner cylinder; 411-third convex strip; 42-second screw nut; 5-lifting drive mechanism; 51-active screw; 511-second guide groove; 52-servo motor; 53-bearing seat; 54-worm; 55-worm wheel; 6-sealing sleeve; 7-photographic head. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-2An electric lifting rod comprises a base plate 1, an outer tube 2, a multi-stage telescopic mechanism 3, an end telescopic mechanism 4 and a lifting drive mechanism 5. The bottom end of the outer tube 2 is mounted on the base plate 1, serving as a main body for accommodating the multi-stage telescopic mechanism 3 and the end telescopic mechanism 4. The multi-stage telescopic mechanism 3 comprises an intermediate tube 31 with openings at both ends and a hollow shape, and the end telescopic mechanism 4 comprises an inner tube 41 with openings at both ends and a hollow shape. The multi-stage telescopic mechanism 3 is provided with a plurality of intermediate tubes 31 of the multi-stage telescopic mechanism 3, and the intermediate tubes 31 of the plurality of multi-stage telescopic mechanisms 3 are telescopically sleeved in order from large to small in diameter. The intermediate tube 31 with the largest diameter is telescopically arranged in the outer tube 2, and the inner tube 41 is telescopically arranged in the intermediate tube 31 with the smallest diameter.

[0029] See also Figure 4-5 The lifting drive mechanism 5 includes an active screw rod 51 which is rotatably arranged in the outer cylinder 2 and extends axially along the outer cylinder 2 to the intermediate cylinder 31 and the inner cylinder 41. The active screw rod 51 is used to drive the intermediate cylinder 31 to extend and retract relative to the outer cylinder 2 while driving the inner cylinder 41 to extend and retract relative to the intermediate cylinder 31 synchronously, so that the intermediate cylinder 31 extends outward relative to the inner cylinder 41 while the inner cylinder 41 also extends outward relative to the intermediate cylinder 31, which not only improves the telescopic efficiency but also greatly increases the telescopic distance; when the electric lifting rod stops being used, the intermediate cylinder 31 can be retracted into the outer cylinder 2 while the inner cylinder 41 is also retracted into the intermediate cylinder 31, so that the entire structure is compact, occupies little space, and is easy to place and use.

[0030] See also Figure 5-7 The multi-stage telescopic mechanism 3 includes a first screw nut 32 and a hollow screw 33. The first screw nut 32 connected to the bottom end of the intermediate cylinder 31 and facing the bottom of the outer cylinder 2 is sleeved on the active screw 51 through a thread. The hollow screw 33 located inside the intermediate cylinder 31 and in a hollow shape is fixedly sleeved on the active screw 51. One end of the hollow screw 33 is rotatably connected to the first screw nut 32, and the other end extends axially along the intermediate cylinder 31 to the inside of the inner cylinder 41. The first screw nut 32 can drive the hollow screw 33 to move axially along the active screw 51 to achieve the telescopic movement of the intermediate cylinder 31 relative to the outer cylinder 2.

[0031] See also Figure 5 The inner wall of the outer cylinder 2 is provided with a plurality of first guide grooves 21 along its axial direction, and the outer wall of the intermediate cylinder 31 is provided with a plurality of first convex strips 311 along its axial direction that fit into the first guide grooves 21. In this embodiment, the first convex strips 311 are used to limit the rotation of the intermediate cylinder 31, thereby limiting the rotation of the first screw nut 32, so that when the active screw 51 rotates, the first screw nut 32 can drive the intermediate cylinder 31 to move along the length direction of the active screw 51, thereby realizing telescoping.

[0032] See also Figure 7-8The outer circumference of the active screw 51 is provided with a plurality of second guide grooves 511 along its axial direction, and the inner circumference of the hollow screw 33 is provided with a second convex strip 331 adapted to the plurality of second guide grooves 511 along its axial direction. In this embodiment, the second convex strip 331 enables the active screw 51 to drive the hollow screw 33 to rotate synchronously, and the hollow screw 33 can also move up and down relative to the active screw 51 along the second guide groove 511 driven by the first screw nut 32 while rotating.

[0033] See also Figure 5-6 The multi-stage telescopic mechanism 3 also includes a bearing 34. One end of the hollow screw 33 is connected to a sleeve 35 sleeved on the outer peripheral side of the first screw nut 32, and an annular cavity for accommodating the bearing 34 is formed between the inner peripheral side of the sleeve 35 and the outer peripheral side of the first screw nut 32. The hollow screw 33 can move axially and rotate relative to the first screw nut 32 through the bearing 34.

[0034] Preferably, see Figure 5 as well as Fig. 9 The first screw nut 32 includes a seat body 321 and a sleeve portion 322 connected to the end face of the seat body 321, the outer peripheral edge of the seat body 321 is connected to the inner wall of the bottom end of the intermediate tube 31, the bearing 34 is sleeved on the outer peripheral side of the sleeve portion 322, and the end face of the sleeve portion 322 abuts against the inner end face of the sleeve 35.

[0035] See also Figure 1 as well as Figure 5 The end telescopic mechanism 4 includes a second screw nut 42 connected to the bottom end of the inner cylinder 41, and the second screw nut 42 is threadedly sleeved on the hollow screw 33. The inner peripheral wall of the intermediate cylinder 31 is provided with a plurality of third guide grooves 312 along its axial direction, and the outer peripheral wall of the inner cylinder 41 is provided with a third convex strip 411 adapted to the plurality of third guide grooves 312 along its axial direction. The third convex strip 411 is used to limit the rotation of the outer cylinder 2 relative to the intermediate cylinder 31, and when the hollow screw 33 rotates, the second screw nut 42 drives the inner cylinder 41 to telescope relative to the intermediate cylinder 31, and in this process, the third guide groove 312 plays a guiding and limiting role.

[0036] Preferably, see Figure 1-3 The top end faces of the outer tube 2 and the intermediate tube 31 are both provided with an annular stepped groove, in which a sealing sleeve 6 for sealing is embedded, and the inner circumference of the sealing sleeve 6 is provided with a through opening for the first convex strip 311 and the third convex strip 411 to pass through.

[0037] See also Figure 2 as well as Figure 6The lifting drive mechanism 5 includes a servo motor 52, two bearing seats 53, a worm 54 and a worm wheel 55. The servo motor 52 and the two bearing seats 53 arranged opposite to each other are arranged on the bottom surface of the bottom plate 1 facing away from the outer cylinder 2. The worm 54 is rotatably mounted on the two bearing seats 53. The output shaft of the servo motor 52 is connected to one end of the worm 54 through a belt to drive the worm 54 to rotate. The worm wheel 55 meshing with the worm 54 is fixedly sleeved on one end of the active screw 51 passing through the bottom plate 1. The axial directions of the worm 54 and the worm wheel 55 are perpendicular to each other.

[0038] Preferably, see Figure 1 The outer tube 2 is connected to one end of the intermediate tube 31 with a photographic platform 7 for shooting. The instrument equipment is detected and read through the photographic platform 7. The photographic platform 7 can adopt the structure in the prior art, and its structure will not be repeated here.

[0039] The working principle of the utility model electric lifting rod is: Figure 1 as well as Figure 4-6 When the servo motor 52 is started in the forward direction, the worm 54 is driven by the belt to rotate, and the worm 54 drives the active screw 51 to rotate together through the worm wheel 55 meshing therewith. The first screw nut 32 is driven by the active screw 51 to move axially along the active screw 51, thereby driving the intermediate cylinder 31 to extend outward relative to the outer cylinder 2; at the same time, the active screw 51 drives the hollow screw 33 to rotate synchronously through the second guide groove 511, and under the drive of the hollow screw 33, the second screw nut 42 moves axially along the hollow screw 33, thereby driving the inner cylinder 41 to extend outward relative to the intermediate cylinder 31, and the telescopic speed is fast, so that the photographic platform 7 at one end of the inner cylinder 41 moves quickly to the preset position for detection and reading; on the contrary, when the servo motor 52 is started in the reverse direction, the movement or rotation direction of the above structure moves in the opposite direction, so that the inner cylinder 41 retracts into the intermediate cylinder 31 while the intermediate cylinder 31 retracts into the outer cylinder 2.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric lifting rod, characterized in that: The invention comprises a bottom plate (1), an outer tube (2), a multi-stage telescopic mechanism (3), an end telescopic mechanism (4) and a lifting drive mechanism (5). The bottom end of the outer tube (2) is mounted on the bottom plate (1). The multi-stage telescopic mechanism (3) comprises an intermediate tube (31). The end telescopic mechanism (4) comprises an inner tube (41). The multi-stage telescopic mechanism (3) is provided with a plurality of intermediate tubes (31) of the plurality of multi-stage telescopic mechanisms (3). The intermediate tubes (31) of the plurality of multi-stage telescopic mechanisms (3) are telescopically sleeved in order from large to small in diameter. The intermediate tube (31) with the largest diameter is telescopically arranged in the outer tube (2), and the inner tube (41) is telescopically arranged in the intermediate tube (31) with the smallest diameter. The lifting drive mechanism (5) comprises an active screw rod (51) which is rotatably arranged in the outer tube (2) and extends axially along the outer tube (2) to the intermediate tube (31) and the inner tube (41). The active screw rod (51) is used to drive the intermediate tube (31) to telescope relative to the outer tube (2) and to drive the inner tube (41) to telescope relative to the intermediate tube (31) synchronously.

2. The electric lifting rod according to claim 1, characterized in that: The multi-stage telescopic mechanism (3) comprises a first screw nut (32) and a hollow screw (33); the first screw nut (32) connected to the bottom end of the intermediate cylinder (31) is sleeved on the active screw (51) through a thread; the hollow screw (33) located inside the intermediate cylinder (31) is fixedly sleeved on the active screw (51); one end of the hollow screw (33) is rotatably connected to the first screw nut (32) and the other end extends axially along the intermediate cylinder (31) to the inside of the inner cylinder (41).

3. The electric lifting rod according to claim 1, characterized in that: The inner wall of the outer cylinder (2) is provided with a plurality of first guide grooves (21) along its axial direction, and the outer wall of the intermediate cylinder (31) is provided with a plurality of first convex strips (311) which fit in the first guide grooves (21) along its axial direction.

4. The electric lifting rod according to claim 2, characterized in that: The outer circumference of the active screw rod (51) is provided with a plurality of second guide grooves (511) along its axial direction, and the inner circumference of the hollow screw rod (33) is provided with a second convex strip (331) adapted to the plurality of second guide grooves (511) along its axial direction.

5. The electric lifting rod according to claim 2 or 4, characterized in that: The multi-stage telescopic mechanism (3) comprises a bearing (34); one end of the hollow screw (33) is connected to a shaft sleeve (35) sleeved on the outer peripheral side of the first screw nut (32); and an annular cavity for accommodating the bearing (34) is correspondingly formed between the inner peripheral side of the shaft sleeve (35) and the outer peripheral side of the first screw nut (32).

6. The electric lifting rod according to claim 5, characterized in that: The first screw nut (32) comprises a seat body (321) and a sleeve connection portion (322) connected to the end surface of the seat body (321); the outer peripheral edge of the seat body (321) is connected to the inner wall of the bottom end of the intermediate tube (31); and the bearing (34) is sleeved on the outer peripheral side of the sleeve connection portion (322).

7. The electric lifting rod according to claim 2, characterized in that: The end telescopic mechanism (4) comprises a second screw nut (42) connected to the bottom end of the inner tube (41), and the second screw nut (42) is threadedly sleeved on the hollow screw (33).

8. The electric lifting rod according to claim 7, characterized in that: The inner peripheral wall of the intermediate cylinder (31) is provided with a plurality of third guide grooves (312) along its axial direction, and the outer peripheral wall of the inner cylinder (41) is provided with a third convex strip (411) adapted to the plurality of third guide grooves (312) along its axial direction.

9. The electric lifting rod according to claim 1, characterized in that: The top end surfaces of the outer cylinder (2) and the middle cylinder (31) are both provided with an annular stepped groove, and a sealing sleeve (6) is embedded in the stepped groove.

10. The electric lifting rod according to claim 1, characterized in that: The lifting drive mechanism (5) comprises a servo motor (52), two bearing seats (53), a worm (54) and a worm wheel (55); the servo motor (52) and the two bearing seats (53) arranged opposite to each other are arranged on the bottom surface of the base plate (1) facing away from the outer cylinder (2); the worm (54) is rotatably mounted on the two bearing seats (53); the output shaft of the servo motor (52) is transmission-connected to one end of the worm (54) through a belt; and the worm wheel (55) meshing with the worm (54) is fixedly sleeved on one end of the active screw (51) passing through the base plate (1).

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