CN221810252U - Lifting device based on street lamp line maintenance - Google Patents

Abstract

The utility model discloses a lifting device based on street lamp line maintenance, which comprises a U-shaped base, wherein four corners of the bottom of the U-shaped base are rotatably provided with universal wheels with locks, the inner side of the U-shaped base is provided with a bearing frame with an opening at the top, a back-shaped guard plate is arranged above the bearing frame, and the front side of the bearing frame is provided with an inlet and outlet hole. According to the utility model, a series of structures are arranged, so that the double lifting of the bearing frames is conveniently driven at two sides, and the falling object shielding protection is always carried out at the upper part during use, the lifting distance can be increased and the lifting adjustment efficiency can be improved in a limited height by utilizing the double lifting mode, and the initial position of the U-shaped base is conveniently kept at a low position close to the ground by matching with the lifting structure arranged at two sides of the U-shaped base by arranging the bearing frames at the inner side of the U-shaped base in a mode of matching with the lifting structure, so that people can conveniently and directly enter and exit at the low position without climbing in and out, the use convenience and safety are improved, and the use is convenient for people.

Description

A lifting device based on street lamp line maintenance

Technical Field

The utility model relates to the technical field of lifting equipment, in particular to a lifting device based on street lamp line maintenance.

Background Art

Street lamps are used for nighttime lighting, and generally refer to lamps within the scope of road lighting in traffic lighting. Street lamps are widely used in various places where lighting is required. Street lamps and their lines need regular maintenance and repair. The existing means can be conveniently lifted to different heights by using a lifting platform vehicle to maintain street lamps at different heights.

Patent "CN217996736U" proposes a lifting device based on street lamp maintenance. It mainly aims at the problem that the height of the guardrail of the existing lifting equipment is fixed, the protection height cannot be adjusted, and the safety is low. The following technical solutions are proposed: it includes a mobile base and a work table installed above the mobile base, the top of the work table is connected with a protective plate 1, and the top of the work table is also provided with a protective plate 2 symmetrical to the protective plate 1, and the protective plate 1 and the protective plate 2 are both provided with a protective frame assembly; the lifting height can be adjusted, the protection of workers is more comprehensive, it is suitable for adjusting the protection height, and the safety of the maintenance equipment is improved, and the equipment has various functions, is flexible and convenient to use, and is mainly used for lifting platforms for street lamp maintenance;

The above technology can adjust the support height and the fence protection height to achieve lifting support and protection for street lamp line maintenance personnel, but there are the following shortcomings in actual use: 1. The lifting structure is directly arranged at the bottom of the lifting platform. After lowering, the bottom will still be occupied by a large space by the lifting structure, resulting in the lowest position of the lifting platform is still relatively high, which is inconvenient for personnel to directly enter and exit at a low place. They need to climb in and out separately, and the convenience of use is not ideal; 2. When the lifting is used, the upper part lacks a structure to protect against falling objects. When objects fall from a high altitude accidentally, it is easy to cause injuries to maintenance personnel, and the safety of use is not ideal; in view of this, a lifting device based on street lamp line maintenance is proposed.

Utility Model Content

The purpose of the utility model is to provide a lifting device based on street lamp line maintenance to solve the problems raised in the above background technology.

To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lifting device based on street lamp line maintenance, comprising a U-shaped base, the bottom four corners of the U-shaped base are rotatably mounted with universal wheels with locks, the inner side of the U-shaped base is provided with a bearing frame with an opening at the top, a circular guard plate is provided above the bearing frame, an inlet and outlet hole is provided on the front side of the bearing frame, a blocking rod located in front of the inlet and outlet hole is rotatably mounted on the left side of the front side of the bearing frame, an L-shaped card block is fixedly connected to the right side of the front side of the bearing frame, the blocking rod is movably mounted on the L-shaped card block, the bearing frame located at the bottom is used to facilitate the street lamp line maintenance personnel to directly enter and exit at the bottom, and the street lamp line maintenance personnel are supported by the bearing frame;

An adjustable enclosure component is installed on the bearing frame, and the adjustable enclosure component is used to adjust the guard height according to the different heights of street lamp line maintenance personnel;

Two double lifting assemblies are installed between the bottom of the circular guard plate and the top of the U-shaped base, and the adjacent sides of the two double lifting assemblies are respectively fixedly connected to the two sides of the bearing frame, and the top ends of the two double lifting assemblies extend into the circular guard plate and are fixedly connected to the same linkage assembly. A driving motor with an output shaft fixedly connected to the linkage assembly is fixedly installed on the left side of the top of the circular guard plate, and the linkage assembly is used to drive the two double lifting assemblies to rotate synchronously when the driving motor is started, and the double lifting assembly is used to drive the bearing frame to double lift and adjust the support height.

Preferably, the adjustable enclosure assembly includes a circular guardrail arranged above the supporting frame, two vertical guide grooves are provided on both sides of the top of the supporting frame, vertical guide rods are provided in the sliding sleeves in the vertical guide grooves, the top ends of the four vertical guide rods are fixedly connected to the bottom of the circular guardrail, and electric push rods with protruding ends fixedly connected to the bottom of the circular guardrail are fixedly installed on the inner walls on both sides of the supporting frame, a synchronous control switch is fixedly connected to the front side of the electric push rod on the left, and the two electric push rods are electrically connected to the synchronous control switch.

Preferably, the linkage assembly includes four synchronous wheels arranged in a trapezoidal shape in the circular guard plate, the four synchronous wheels are connected to the same synchronous belt for transmission, and the top of the synchronous wheel located on the left front side is fixedly connected to the bottom end of the output shaft of the drive motor.

Preferably, the double lifting assembly includes a rectangular plate fixedly connected to the bottom of the circular guard plate, the bottom of the rectangular plate is provided with a rectangular groove, a rectangular support rod is slidably sleeved in the rectangular groove, the top two sides of the U-shaped base are respectively fixedly connected to the bottom ends of the corresponding rectangular support rods, a first screw is rotatably installed between the inner walls of the two sides of the rectangular groove, the rectangular support rod is threadedly sleeved on the corresponding first screw, a rectangular groove is provided on the adjacent sides of the two rectangular plates, a second screw is rotatably connected between the top and bottom inner walls of the rectangular groove, a lifting seat is threadedly sleeved on the second screw and slidably installed with the corresponding side walls of the rectangular groove, the adjacent sides of the two lifting seats are respectively fixedly connected to the two sides of the bearing frame, the top end of the first screw and the top end of the second screw both extend into the circular guard plate, and the top ends of the two first screws and the two second screws are respectively fixedly connected to the bottom ends of the corresponding synchronous wheels.

Preferably, a battery is fixedly connected to the bottom of the circular guard plate, and the drive motor, the two electric push rods and the synchronous control switch are all electrically connected to the battery.

Preferably, a first threaded hole threadably connected to a corresponding first screw rod is formed at the top end of the rectangular support rod.

Preferably, a second threaded hole threadedly connected to the corresponding second screw rod is opened on the top of the lifting seat, a T-shaped slide rail is fixedly connected to the inner wall of the rectangular groove away from its opening, and a T-shaped slide groove slidingly connected to the corresponding T-shaped slide rail is opened on the side of the lifting seat away from the carrying frame.

Compared with the prior art, the beneficial effects of the utility model are:

1. This is a lifting device based on street lamp line maintenance. Through the cooperation of the U-shaped base, the bearing frame, the circular guard plate, the linkage assembly, the double lifting assembly and the driving motor, it can drive the bearing frame to double lift on both sides, so as to realize the lifting and supporting of the street lamp line personnel during the street lamp line maintenance. By using the double lifting method, the lifting distance can be increased within a limited height and the lifting adjustment efficiency can be improved;

2. This lifting device based on street light line maintenance can adjust the height of the guardrail according to the different heights of street light line maintenance personnel through the cooperation of the supporting frame and the adjustable enclosure component, so as to prevent personnel from falling accidentally and ensure the safety of street light line maintenance personnel when using it;

3. This lifting device based on street lamp line maintenance can always provide shielding protection at the top when it is lifted up for support use by setting a circular shield plate, so as to prevent the falling objects from hitting people and causing injuries when the objects fall accidentally, thus further improving the safety of use;

4. This is a lifting device based on street lamp line maintenance. By setting the bearing frame on the inner side of the U-shaped base and coordinating the lifting structure on both sides thereof for lifting operations, there is no structure occupying space at the bottom, which makes it convenient to keep the initial position of the U-shaped base at a low position close to the ground. Therefore, it is convenient for personnel to directly enter and exit at a low position without climbing in and out, thereby improving convenience of use.

The utility model is provided with a series of structures, which is convenient for driving the bearing frames on both sides to double lift and always provide falling object shielding protection on the upper part when in use. The double lifting method can increase the lifting distance and improve the lifting adjustment efficiency within a limited height. In addition, by arranging the bearing frame on the inner side of the U-shaped base and cooperating with the lifting structure on both sides thereof, the initial position of the U-shaped base is conveniently maintained in a low position close to the ground, which is convenient for people to directly enter and exit at a low place without climbing in and out, thereby improving convenience and safety in use and facilitating people to use.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the main structure of a lifting device based on street lamp line maintenance proposed by the utility model;

FIG2 is a schematic cross-sectional view of the structure of FIG1 ;

FIG3 is a schematic diagram of a top view of the structure of a linkage assembly of a lifting device based on street lamp line maintenance proposed by the present invention;

FIG. 4 is a schematic diagram of the right side structure of an L-shaped clamping block of a lifting device based on street lamp line maintenance proposed by the present invention.

In the figure: 1. load-bearing frame; 101. inlet and outlet hole; 102. stop rod; 103. L-shaped block; 2. U-shaped base; 3. rectangular plate; 4. circular guard plate; 5. rectangular groove; 6. rectangular support rod; 7. first screw rod; 8. rectangular groove; 9. second screw rod; 10. lifting seat; 11. synchronous wheel; 12. synchronous belt; 13. driving motor; 14. circular guard rod; 15. vertical guide rod; 16. electric push rod.

DETAILED DESCRIPTION

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.

As shown in Figures 1 to 4, a lifting device based on street lamp line maintenance proposed in this embodiment includes a U-shaped base 2, and the four corners of the bottom of the U-shaped base 2 are rotatably installed with universal wheels with locks, the inner side of the U-shaped base 2 is provided with a bearing frame 1 with an opening at the top, and a circular guard plate 4 is provided above the bearing frame 1, and an inlet and outlet hole 101 is opened on the front side of the bearing frame 1. A baffle 102 located in front of the inlet and outlet hole 101 is rotatably installed on the left side of the front side of the bearing frame 1, wherein a pin is fixedly connected to the left side of the front side of the bearing frame 1, and the front of the baffle 102 is fixedly connected to the left side of the front side of the bearing frame 1. A first circular hole is provided on the left side, a first bearing is fixedly sleeved in the first circular hole, the inner ring of the first bearing is fixedly sleeved with the outer side of the pin shaft, which plays the effect of rotating the blocking rod 102, and an L-shaped clamping block 103 is fixedly connected to the right side of the front side of the carrying frame 1, and the blocking rod 102 is movably clamped on the L-shaped clamping block 103, wherein a plurality of weight-reducing through holes for weight reduction are provided on the inner wall of the rear side of the carrying frame 1, and the carrying frame 1 located at the bottom is used to facilitate the direct entry and exit of the street light line maintenance personnel at the bottom, and the street light line maintenance personnel are supported by the carrying frame 1;

An adjustable enclosure component is installed on the supporting frame 1, and the adjustable enclosure component is used to adjust the guarding height according to the street light line maintenance personnel of different heights; two double lifting components are installed between the bottom of the circular guard plate 4 and the top of the U-shaped base 2, and the adjacent sides of the two double lifting components are respectively fixedly connected to the two sides of the supporting frame 1, and the tops of the two double lifting components extend into the circular guard plate 4 and are fixedly connected to the same linkage component. A driving motor 13 with an output shaft fixedly connected to the linkage component is fixedly installed on the left side of the top of the circular guard plate 4, and the linkage component is used to drive the two double lifting components to rotate synchronously when the driving motor 13 is started, and the double lifting component is used to drive the supporting frame 1 to double lift and adjust the support height.

Specifically, the adjustable enclosure assembly includes a circular guardrail 14 arranged above the supporting frame 1, two vertical guide grooves are provided on both sides of the top of the supporting frame 1, and vertical guide rods 15 are slidably sleeved in the vertical guide grooves. The top ends of the four vertical guide rods 15 are fixedly connected to the bottom of the circular guardrail 14, and electric push rods 16 with protruding ends fixedly connected to the bottom of the circular guardrail 14 are fixedly installed on the inner walls of both sides of the supporting frame 1. A synchronous control switch is fixedly connected to the front side of the electric push rod 16 on the left side, and the two electric push rods 16 are electrically connected to the synchronous control switch. A battery is fixedly connected to the bottom of the circular guard plate 4, and the drive motor 13, the two electric push rods 16 and the synchronous control switch are electrically connected to the battery to achieve the effect of power supply; the arranged circular guardrail 14, the vertical guide rods 15 and the electric push rod 16 cooperate, and the electric push rod 16 is used to drive the circular guardrail 14 to move up and down, so as to achieve the effect of adjusting the guardrail height according to the street light line maintenance personnel of different heights.

Furthermore, the linkage assembly includes four synchronous wheels 11 arranged in a trapezoidal shape inside the circular guard plate 4, the four synchronous wheels 11 are connected to the same synchronous belt 12 for transmission, and the top of the synchronous wheel 11 located on the left front side is fixedly connected to the bottom end of the output shaft of the driving motor 13; the four synchronous wheels 11 and the synchronous belt 12 cooperate to drive the four synchronous wheels 11 to rotate synchronously when the driving motor 13 is started.

Furthermore, the double lifting assembly includes a rectangular plate 3 fixedly connected to the bottom of the circular guard plate 4, a rectangular groove 5 is provided at the bottom of the rectangular plate 3, a rectangular support rod 6 is slidably sleeved in the rectangular groove 5, the top two sides of the U-shaped base 2 are respectively fixedly connected to the bottom ends of the corresponding rectangular support rods 6, a first screw rod 7 is rotatably installed between the inner walls of the two sides of the rectangular groove 5, wherein a second bearing is fixedly connected between the inner walls of the two sides of the rectangular groove 5, the inner side of the inner ring of the second bearing is fixedly connected to the outer side of the corresponding first screw rod 7, which plays the effect of rotatably installing the first screw rod 7, and the bottom of the circular guard plate 4 is provided with two second circular holes for the corresponding first screw rod 7 to movably pass through, the rectangular support rod 6 is threadedly sleeved on the corresponding first screw rod 7, wherein the top end of the rectangular support rod 6 A first threaded hole is provided which is threadedly connected with the corresponding first screw rod 7. The threaded connection relationship between the first screw rod 7 and the first threaded hole is utilized to facilitate the up and down displacement of the first screw rod 7 when it rotates. A rectangular groove 8 is provided on one side close to the two rectangular plates 3. A second screw rod 9 is rotatably connected between the top and bottom inner walls of the rectangular groove 8. A third circular hole is provided on the top inner wall of the rectangular groove 8. A third bearing is fixedly installed in the third circular hole and on the bottom inner wall of the rectangular groove 8. The inner ring of the third bearing is fixedly fitted with the outer side of the corresponding second screw rod 9, so as to achieve the effect of rotatably installing the second screw rod 9. A lifting seat 10 which is slidably installed with the corresponding side wall of the rectangular groove 8 is provided on the second screw rod 9. The top of the lifting seat 10 A second threaded hole is provided which is threadedly connected to the corresponding second screw rod 9. The threaded connection relationship between the second screw rod 9 and the second threaded hole is utilized to facilitate driving the lifting seat 10 to move up and down when the second screw rod 9 rotates. A T-shaped slide rail is fixedly connected to the inner wall of the rectangular groove 8 on the side away from its opening. A T-shaped slide groove which is slidably connected to the corresponding T-shaped slide rail is provided on the side of the lifting seat 10 away from the bearing frame 1. The provided T-shaped slide groove and the T-shaped slide rail cooperate to guide the vertical sliding of the lifting seat 10. The adjacent sides of the two lifting seats 10 are respectively fixedly connected to the two sides of the bearing frame 1. The top ends of the first screw rod 7 and the second screw rod 9 both extend into the circular guard plate 4. The top ends of the two first screw rods 7 and the top ends of the two second screw rods 9 are respectively It is fixedly connected to the bottom of the corresponding synchronous wheel 11; the rectangular plate 3, rectangular groove 5, first screw rod 7, rectangular support rod 6, rectangular groove 8, lifting seat 10 and second screw 9 are cooperated, and four rotating synchronous wheels 11 are used to drive the two first screw rods 7 and the two second screw rods 9 to rotate synchronously, the first screw 7 rotates and moves up and down in the corresponding rectangular support rod 6, the first screw 7 drives the corresponding rectangular plate 3 to move up and down, and the second screw 9 drives the corresponding lifting seat 10 to move up and down when it rotates. Under the cooperation of the up and down movement of the rectangular plate 3 and the up and down movement of the lifting seat 10 installed in the rectangular plate 3, there are two synchronous up and down moving forces, so as to achieve the effect of driving the lifting seat 10 to double lift, and the lifting seat 10 is used to drive the bearing frame 1 to double lift.

The method of using the present embodiment is as follows: the carrying frame 1 arranged on the inner side of the U-shaped base 2 is provided with a lifting structure on both sides thereof, so that the bottom thereof has no structure occupying space, and the initial position of the carrying frame 1 can be maintained at a low position close to the ground, so that it is convenient for personnel to directly enter and exit at a low position without climbing in and out, thereby improving the convenience of use; when entering and exiting, the personnel first rotate the blocking rod 102 upward to open it, and then they can enter and exit through the entry and exit hole 101. After entering, the blocking rod 102 is rotated downward to make it snap into the L-shaped block 103, and at this time, the blocking rod 102 performs a safety shielding work at the front side of the entry and exit hole 101;

When the guarding height needs to be adjusted according to the different heights of the personnel, the two electric push rods 16 are started in the positive direction to drive the return guarding rod 14 to move upward, and the return guarding rod 14 drives the four vertical guide rods 15 to slide upward in the corresponding vertical guide grooves. At this time, the guarding height formed by the return guarding rod 14 changes. After the adjustment is appropriate, the electric push rod 16 can be closed, so that the guarding height can be adjusted according to the different heights of the street lamp line maintenance personnel, preventing the personnel from accidentally falling, and ensuring the safety of the street lamp line maintenance personnel when using;

When it is necessary to adjust the support height according to the maintenance height of the street light line, the drive motor 13 is started in the positive direction to drive the synchronous wheel 11 on the left front side to rotate, and the synchronous wheel 11 on the left front side drives the other three synchronous wheels 11 to rotate through the synchronous belt 12, so as to drive the four synchronous wheels 11 to rotate synchronously, and the four synchronous wheels 11 drive the two first screws 7 and the two second screws 9 to rotate synchronously, and the first screw 7 rotates in the first threaded hole on the corresponding rectangular support rod 6 and moves upward, at this time, the first screw 7 drives the corresponding rectangular plate 3 to slide upward on the rectangular support rod 6, and the two rectangular plates 3 drive the circular guard plate 4 to move upward, and at the same time, the rectangular plate 3 drives the bearing frame 1 to move upward through the corresponding second screw 9 and the lifting seat 10 in turn, wherein the second screw 9 drives the corresponding lifting seat 10 to slide upward on the T-shaped slide rail when it rotates, and the two lifting seats 10 drive the bearing frame 1 to move upward, and the rectangular plate 3 drives the supporting frame 1 to move upward. The upward movement of the shaped plate 3 drives the lifting seat 10 to move upward. With the action of the lifting seat 10 being driven by the corresponding second screw 9 to move upward, there are two driving forces for the support frame 1 to move upward, thereby achieving the effect of double driving the support frame 1 to move upward. By utilizing the double lifting method, the lifting distance can be increased and the lifting adjustment efficiency can be improved within a limited height. When it is lifted to the street light line, the street light line maintenance personnel can carry out maintenance work. When it is used for maintenance, the circular guard plate 4 is always at the top for shielding and protection, which can prevent the falling objects from hitting the personnel and causing injuries when falling objects occur accidentally, thereby improving the safety of use. After use, the drive motor 13 is started in the reverse direction. Similarly, the movement direction of the drive motor 13 is completely opposite to that of the above-mentioned forward start. At this time, the support frame 1 changes to double downward movement, and gradually moves down to a low position close to the ground, and the personnel can walk out at this time.

Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims (7)

1. A lifting device based on street lamp line maintenance, comprising a U-shaped base (2), wherein the four corners of the bottom of the U-shaped base (2) are rotatably mounted with universal wheels with locks, and characterized in that: a bearing frame (1) with an opening at the top is arranged on the inner side of the U-shaped base (2), a circular guard plate (4) is arranged above the bearing frame (1), an inlet and outlet hole (101) is arranged on the front side of the bearing frame (1), a blocking rod (102) located in front of the inlet and outlet hole (101) is rotatably mounted on the left side of the front side of the bearing frame (1), an L-shaped clamping block (103) is fixedly connected to the right side of the front side of the bearing frame (1), and the blocking rod (102) is movably mounted on the L-shaped clamping block (103); An adjustable enclosure component is installed on the bearing frame (1); Two double lifting assemblies are installed between the bottom of the circular guard plate (4) and the top of the U-shaped base (2); the adjacent sides of the two double lifting assemblies are respectively fixedly connected to the two sides of the bearing frame (1); the top ends of the two double lifting assemblies extend into the circular guard plate (4) and are fixedly connected to the same linkage assembly; a driving motor (13) whose output shaft is fixedly connected to the linkage assembly is fixedly installed on the left side of the top of the circular guard plate (4). 2. A lifting device based on street lamp line maintenance according to claim 1, characterized in that: the adjustable enclosure assembly includes a circular guardrail (14) arranged above the supporting frame (1), two vertical guide grooves are provided on both sides of the top of the supporting frame (1), and vertical guide rods (15) are provided in the sliding sleeves in the vertical guide grooves, and the top ends of the four vertical guide rods (15) are fixedly connected to the bottom of the circular guardrail (14), and electric push rods (16) whose protruding ends are fixedly connected to the bottom of the circular guardrail (14) are fixedly installed on the inner walls of both sides of the supporting frame (1), and a synchronous control switch is fixedly connected to the front side of the electric push rod (16) located on the left side, and the two electric push rods (16) are electrically connected to the synchronous control switch. 3. A lifting device based on street lamp line maintenance according to claim 2, characterized in that: the linkage component includes four synchronous wheels (11) arranged in a trapezoidal shape inside the circular guard plate (4), and the four synchronous wheels (11) are transmission-connected with the same synchronous belt (12), and the top of the synchronous wheel (11) located on the left front side is fixedly connected to the bottom end of the output shaft of the drive motor (13). 4. A lifting device based on street lamp line maintenance according to claim 3, characterized in that: the double lifting component comprises a rectangular plate (3) fixedly connected to the bottom of the circular guard plate (4), a rectangular groove (5) is provided at the bottom of the rectangular plate (3), a rectangular support rod (6) is slidably sleeved in the rectangular groove (5), the top two sides of the U-shaped base (2) are respectively fixedly connected to the bottom ends of the corresponding rectangular support rods (6), a first screw rod (7) is rotatably installed between the inner walls of the two sides of the rectangular groove (5), the rectangular support rod (6) is threadedly sleeved on the corresponding first screw rod (7), and the two rectangular plates (3) are fixedly connected to the bottom ends of the rectangular support rods (6). ) are provided with a rectangular groove (8) on one side thereof, a second screw rod (9) is rotatably connected between the top and bottom inner walls of the rectangular groove (8), a lifting seat (10) is threadedly sleeved on the second screw rod (9) and is slidably mounted on the corresponding side wall of the rectangular groove (8), the two lifting seats (10) are respectively fixedly connected to the two sides of the bearing frame (1), the top end of the first screw rod (7) and the top end of the second screw rod (9) both extend into the circular guard plate (4), and the top ends of the two first screw rods (7) and the top ends of the two second screw rods (9) are respectively fixedly connected to the bottom of the corresponding synchronous wheel (11). 5. A lifting device based on street lamp line maintenance according to claim 2, characterized in that: a battery is fixedly connected to the bottom of the circular guard plate (4), and the drive motor (13), two electric push rods (16) and the synchronous control switch are all electrically connected to the battery. 6. A lifting device based on street lamp line maintenance according to claim 4, characterized in that: a first threaded hole threadedly connected to the corresponding first screw rod (7) is provided at the top end of the rectangular support rod (6). 7. A lifting device based on street lamp line maintenance according to claim 4, characterized in that: a second threaded hole threadedly connected to the corresponding second screw rod (9) is opened on the top of the lifting seat (10), a T-shaped slide rail is fixedly connected to the inner wall of the rectangular groove (8) away from its opening, and a T-shaped slide groove slidably connected to the corresponding T-shaped slide rail is opened on the side of the lifting seat (10) away from the supporting frame (1).