CN112482922A

CN112482922A - Take overload protection's electronic vaulting pole

Info

Publication number: CN112482922A
Application number: CN202011359342.4A
Authority: CN
Inventors: 王正祥; 李全佑; 戴光林; 张志浩
Original assignee: Ningbo Tuopu Group Co Ltd
Current assignee: Ningbo Tuopu Group Co Ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-03-12

Abstract

The invention discloses an electric support rod with overload protection, which comprises a telescopic rod body of the electric support rod. structure, one end of the first telescopic rod is fixedly connected with a first casing, the first casing is rotatably connected with a first rotating mechanism that drives the telescopic structure to expand and contract, and the outer side wall of the first casing is fixedly connected with a second casing through the transition part, A first accommodating cavity is arranged in the second housing, a second rotating mechanism is rotatably connected in the first accommodating cavity, a motor for driving the rotation of the second rotating mechanism is also arranged in the second housing, and a third rotating mechanism is arranged in the adapter part. A rotating mechanism, the second rotating mechanism is rotatably connected to the first rotating mechanism through the third rotating mechanism, the second rotating mechanism includes a first rotating shaft with one end rotatably connected to the motor, the outer side wall of the first rotating shaft is rotatably connected with an overload protection mechanism, and the first rotating shaft is away from the motor. The outer side wall of one end is rotatably connected with a first gear, the first gear is plugged with the filter protection mechanism, and the first gear is rotatably connected to the first rotation mechanism through the third rotation mechanism.

Description

Take overload protection's electronic vaulting pole

Technical Field

The invention relates to the technical field of electric tail gates of vehicles, in particular to an electric stay bar with overload protection.

Background

The electric stay bar is currently and commonly used for opening and closing the tail door of the car body, but the fixed stroke of the electric stay bar of the tail door of the three-compartment car is always a common problem. In some compact trunk enclosures, it is more difficult to use a fixed longer travel motorized strut.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the electric stay bar with the overload protection, which can be additionally arranged in the tail box of the three-compartment car with a compact space.

The invention relates to an electric stay bar with overload protection, which comprises a telescopic bar body of the electric stay bar, wherein a first telescopic bar capable of driving the electric stay bar to stretch is slidably connected in the telescopic bar body, a telescopic structure is arranged in the first telescopic bar, one end of the first telescopic bar is fixedly connected with a first shell, a first rotating mechanism for driving the telescopic structure to stretch is rotatably connected in the first shell, the outer side wall of the first shell is fixedly connected with a second shell through a switching part, a first accommodating cavity is arranged in the second shell, a second rotating mechanism is rotatably connected in the first accommodating cavity, a motor for driving the second rotating mechanism to rotate is also arranged in the second shell, a third rotating mechanism is arranged in the switching part, the second rotating mechanism is rotatably connected with the first rotating mechanism through the third rotating mechanism, the second rotating mechanism comprises a first rotating shaft, one end of the first rotating mechanism is rotatably connected with the motor, and the outer side wall of, the outer side wall of one end, far away from the motor, of the first rotating shaft is rotatably connected with a first gear, the first gear is connected with the filtering protection mechanism in an inserting mode, and the first gear is rotatably connected with a first rotating mechanism through a third rotating mechanism.

Compared with the product structure in the prior art, the product structure in the technical scheme has the following advantages:

the three gears in the technical scheme realize steering and are arranged in parallel, so that the fixed stroke can be effectively reduced, and the three-compartment car tail box can be applied to a three-compartment car with compact space. The overload protection mechanism arranged in the second shell in the technical scheme can effectively prevent the power which can effectively cut off the driving motor from being separated from the screw rod transmission when the tail gate is violently or mistakenly operated by people, and prevents the motor from blocking the rotation to cause the damage of a transmission system. Consequently compare in traditional electronic vaulting pole, the fixed stroke of electronic vaulting pole in this scheme is shorter, can satisfy the more compact motorcycle type in general space, and overload protection mechanism among this technical scheme also can effectively play the guard action to whole electronic vaulting pole simultaneously, prolongs the life of electronic vaulting pole.

In the technical scheme, when the overload protection mechanism is not overloaded: the motor is rotated after the circular telegram and is exported for first pivot from the reducing gear box in area to the rethread motor, and because the spout that first pivot passes through slider and separation disc inside wall is sliding connection, consequently, the circumferential direction of first pivot can drive the separation disc and carry out circumferential direction, and the separation disc is close to third casing one end this moment and is pegged graft through first spacing recess and first spacing arch and third casing, consequently, the circumferential direction of separation disc can drive the third casing and carry out circumferential direction in first holding intracavity, thereby realize linkage output power and give the casing. And the third casing deviates from and is the grafting structure between separation disc one side and the first gear, therefore the rotation power of third casing can be exported first gear, transmits the driving tooth by first gear again, finally transmits the extending structure in the first telescopic link by the transmission shaft.

Overload protection mechanism is when transshipping among this technical scheme: when the torque transmitted to the separating disc by the first rotating shaft is too large, the torque component of the separating disc enables the separating disc to overcome the spring force given by the first spring, the separating disc can slide towards the first spring on the sliding block on the outer side wall of the first rotating shaft, and then the first limiting groove of the separating disc is separated from the first limiting protrusion on the bottom surface of the third shell, so that the circumferential rotation power of the separating disc can not be transmitted to the third shell, and further the third shell and the separating disc slide relatively, namely slip. Finally, the circumferential rotation power of the first rotating shaft cannot be transmitted to the first gear through the third shell, and the kinetic energy of the circumferential rotation of the first rotating shaft cannot be transmitted to the telescopic structure in the first telescopic rod. The torque limit required for slipping is determined by the magnitude of the spring force

As a preference: the overload protection mechanism comprises a third shell, one end of the third shell is connected with the first gear in an inserting mode, a column containing groove is formed in one side, deviating from the first gear, of the third shell, a first through hole is formed in the bottom surface of the column containing groove, the first rotating shaft can penetrate through the first through hole in the transverse direction, a separating disc is connected to the outer side wall of the first rotating shaft in the column containing groove in a sliding mode, a gasket is arranged on one side, away from the separating disc, of the column containing groove, the outer side wall of the gasket is attached to the inner side wall of the column containing groove, a first spring is arranged between the gasket and the separating disc, a plurality of first limiting grooves are formed in the separating disc, close to one side of the bottom surface of the. First pivot passes behind the first holding chamber lateral wall to be connected with the motor rotation, and when transshipping, the gasket of first pivot lateral wall deviates from first spring one end and the inboard wall laminating that first holding chamber is close to motor one side. When no overload exists, the outer side wall of the gasket is in interference fit with the inner side wall of the columnar containing groove.

As a preference: the outer side wall of one side, far away from the columnar containing groove, of the third shell is circumferentially provided with a second limiting groove, and the outer side wall of one side, near the third shell, of the first gear is provided with a second limiting protrusion capable of being inserted into the second limiting groove.

As a preference: the second accommodating cavity is arranged in the switching part, one end of the first gear is communicated with the second accommodating cavity, a third rotating mechanism is connected in the second accommodating cavity in a rotating mode and comprises a second rotating shaft which is connected in the second accommodating cavity in a rotating mode, the outer side wall of the second rotating shaft is connected with a transmission gear in a rotating mode, the transmission gear is meshed with the first gear, and the transmission gear is in transmission connection with the first rotating mechanism in the first shell.

As a preference: be equipped with the third holding chamber in the first casing, third holding chamber and second holding chamber intercommunication, first rotation mechanism is including rotating the second gear of connecting in the third holding intracavity, second gear lateral wall and drive gear meshing, and the second gear lateral wall rotates and is connected with the bearing, and the bearing lateral wall touches mutually with third holding intracavity lateral wall, the first telescopic link of third holding intracavity fixedly connected with. .

As a preference: the first telescopic rod comprises a first pipe sleeve with one end fixedly connected in a third containing cavity and a second pipe sleeve slidably connected in the first pipe sleeve, one end of the first pipe sleeve far away from the first shell is provided with a second through hole for the second pipe sleeve to slide out, the first pipe sleeve and the second pipe sleeve are slidably connected with a telescopic structure, the telescopic structure comprises a first lead screw rotatably connected in the first pipe sleeve, one end of the first lead screw stretches into a second gear fixedly connected in the third containing cavity, the first lead screw is far away from the outer side wall of the second gear and is in threaded connection with a lead screw nut, one end of the second pipe sleeve is fixedly connected with one side of the lead screw nut, one end of the second pipe sleeve is far away from a first ball head fixedly connected with one end of the first pipe sleeve, a second spring is circumferentially arranged on the outer side wall of the first telescopic rod, one end of the second spring is fixedly connected with the outer side.

As a preference: the circumference of the outer side wall of the first rotating shaft is provided with a sliding block, the center of the separating disc is provided with a third through hole for the first rotating shaft to pass through, the inner side wall of the third through hole is provided with a sliding groove for the sliding block to be embedded into and matched with in a limiting mode, the circumferential interval of the end face of the separating disc close to one side of the bottom face of the columnar accommodating groove is provided with 12 first limiting grooves, and the circumferential interval of the bottom face of the columnar accommodating groove is provided with 12 first limiting bulges capable of being matched with the first limiting.

As a preference: the first holding chamber is close to first gear one side inside wall and is equipped with fourth holding chamber, fourth holding intracavity is equipped with the resistance structure, the resistance structure includes friction structure and third spring, be equipped with the packing ring between third spring and the first gear, first gear one side is kept away from to the third spring offsets with the friction structure, the friction structure includes first preforming, the second preforming, be equipped with the friction disc between first preforming and the second preforming, friction disc one side is kept away from to first preforming offsets with the inside wall in fourth holding chamber, the second preforming is kept away from first preforming one side and is kept away from packing ring one side with the third spring and offset. When electronic vaulting pole extends and contracts in this technical scheme, the resistance structure begins work, can increase first gear pivoted resistance and contribute for electronic vaulting pole, and then offset the dead weight problem of car tail-gate effectively, can let the car tail-gate hover in any position, the switch door is steady, and the self-defined height of opening the door promotes to use and experiences.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic structural diagram of an electric stay bar with overload protection according to the present invention.

Fig. 2 is a connection structure among a first rotating mechanism, a second rotating mechanism and a third rotating mechanism in the electric stay bar with overload protection.

Fig. 3 is an exploded view of a second rotating mechanism in an electric stay bar with overload protection according to the present invention.

Fig. 4 is a schematic structural diagram of a third shell in the electric stay bar with overload protection of the invention.

Fig. 5 is an enlarged view at a in fig. 1.

Fig. 6 is an enlarged view at B in fig. 1.

Fig. 7 is an enlarged view at C in fig. 1.

Detailed Description

In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Example 1: referring to fig. 1 to 7: this technical scheme is when no overload state, and the kinetic energy of motor output can be exported for first pivot through the reducing gear box that the motor was taken certainly after the motor circular telegram in the second casing rotates, and because first pivot is sliding connection through the spout of slider and separation disc inside wall, consequently the circumferential direction of first pivot can drive the separation disc and carry out circumferential direction. And the separating disc is close to third casing one end and is pegged graft through first spacing recess and first spacing arch and third casing this moment, therefore the circumferential direction of separating disc can drive the third casing and carry out circumferential direction in first holding intracavity to realize linkage output power and give the casing. And the third casing deviates from and is the grafting structure between separation disc one side and the first gear, therefore the rotation power of third casing can be exported first gear, transmits the driving tooth by first gear again, finally transmits the extending structure in the first telescopic link by the transmission shaft. At the moment, the transmission gear is transmitted to a second gear in the first shell, the second gear is connected with the first screw rod through a spline, the first screw rod is used for transmitting power through a screw rod nut, a guide groove corresponding to a guide groove on the periphery of the screw rod nut is formed in the guide pipe, the screw rod nut linearly moves in the guide groove, a second pipe sleeve is connected with the screw rod nut in a plastic coating mode, the second pipe sleeve linearly moves along with the screw rod nut, the second pipe sleeve is riveted with a bolt, the bolt is in threaded connection with a second ball head, the second ball head is connected with a tail gate, and finally opening and closing of the tail gate are achieved.

When this technical scheme is in overload protection state: kinetic energy output by the motor after the motor in the second shell is electrified and rotated can be output to the first rotating shaft through the reduction gearbox of the motor, and the first rotating shaft is connected with the sliding groove in the inner side wall of the separation disc in a sliding manner through the sliding block, so that the separation disc can be driven to rotate circumferentially by the circumferential rotation of the first rotating shaft. Along with the continuous rotation of first pivot, when the moment of torsion that first pivot transmitted for the separation dish was too big, separation dish moment of torsion component made the separation dish overcome the spring force that first spring gave, the separation dish can slide to first spring direction on the slider of first pivot lateral wall, and then the first spacing recess of separation dish separates with the first spacing arch of third casing bottom surface to the circumferential direction power that makes the separation dish can't be transmitted for the third casing, and then makes third casing and separation dish do the relative slip, skids promptly. Finally, the circumferential rotation power of the first rotating shaft cannot be transmitted to the first gear through the third shell, and the kinetic energy of the circumferential rotation of the first rotating shaft cannot be transmitted to the telescopic structure in the first telescopic rod. The torque limit required for slip is determined by the magnitude of the spring force.

The resistance structure that sets up between first gear and the first holding chamber lateral wall among this technical scheme is when electronic vaulting pole extends and contracts, and resistance mechanism begins work, can increase driving gear pivoted resistance and contribute for electronic vaulting pole, and then offsets the dead weight problem of car tail-gate effectively, can let car tail-gate hover in any position, and the switch door is steady, and the self-defined height of opening the door promotes to use and experiences.

The resistance structure in this technical scheme includes friction structure and third spring, is equipped with the packing ring between third spring and the first gear, and first gear one side is kept away from to the third spring offsets with the friction structure, and the friction structure includes first preforming, second preforming, is equipped with the friction disc between first preforming and the second preforming, and friction disc one side is kept away from to first preforming offsets with the inside wall in fourth holding chamber, and first preforming one side is kept away from to the second preforming and the packing ring one side is kept away from to the third spring offsets. When the electric stay bar extends and contracts, the resistance structure starts to work, and the resistance of the rotation of the first gear can be increased to contribute to the electric stay bar. When the first gear rotates, the first gear is given extra friction torque, and the circumferential rotation of the first gear needs to overcome the friction torque. In the technical scheme, the third spring is a corrugated spring, and compared with the traditional compression spring, the corrugated spring provides the same elastic force, so that the corrugated spring has the advantages of saving structural space and materials and has the function of light weight. The friction plate is made of copper-based friction material and is soaked with lubricating oil, so that the friction plate has the characteristics of wear resistance, stable friction coefficient, approximate static friction coefficient and dynamic friction coefficient, good wear resistance, high temperature resistance, corrosion resistance and heat conductivity, small thermal deformation and no adhesion during long-term standing. The resistance system has stable function, long service life and good experience. Meanwhile, in the embodiment, the first gear comprises a gear part meshed with the transmission gear and an insertion part inserted into the second accommodating cavity, and through holes for the first rotating shaft to pass through are formed in the centers of the insertion part and the gear part. And the gasket positioned between the third spring and the first gear comprises a through hole which is provided with a through hole in the center and into which the insertion part of the third gear can be inserted, and the outer side wall of the gasket is in threaded connection with the inner side wall of the second accommodating cavity through threads.

The invention relates to an electric stay bar with overload protection, which comprises a telescopic bar body of the electric stay bar, wherein a first telescopic bar 1 capable of driving the electric stay bar to stretch and retract is connected in the telescopic bar body in a sliding way, a telescopic structure 2 is arranged in the first telescopic bar 1, one end of the first telescopic bar 1 is fixedly connected with a first shell 3, a first rotating mechanism 4 for driving the telescopic structure 2 to stretch and retract is connected in the first shell 3 in a rotating way, the outer side wall of the first shell 3 is fixedly connected with a second shell 6 through a switching part 5, a first accommodating cavity 7 is arranged in the second shell 6, a second rotating mechanism 8 is connected in the first accommodating cavity 7 in a rotating way, a motor 9 for driving the second rotating mechanism 8 to rotate is also arranged in the second shell 6, a third rotating mechanism 10 is arranged in the switching part 5, the second rotating mechanism 8 is rotatably connected with the first rotating mechanism 4 through the third rotating mechanism 10, the second rotating mechanism 8 comprises a first rotating shaft 11, the outer side wall of the first rotating shaft 11 is rotatably connected with an overload protection mechanism 12, the outer side wall of one end, far away from the motor 9, of the first rotating shaft 11 is rotatably connected with a first gear 13, the first gear 13 is connected with the overload protection mechanism 12 in an inserting mode, and the first gear 13 is rotatably connected with the first rotating mechanism 4 through a third rotating mechanism 10.

In the technical scheme, when the overload protection mechanism is not overloaded: kinetic energy can be exported for first pivot through the reducing gear box that the motor was taken certainly after the motor circular telegram rotated, and because the spout that first pivot passes through slider and separation disc inside wall is sliding connection, consequently, the circumferential direction of first pivot can drive the separation disc and carry out circumferential direction, and the separation disc is close to third casing one end this moment and is pegged graft through first spacing recess and first spacing arch and third casing, consequently, the circumferential direction of separation disc can drive the third casing and carry out circumferential direction in first holding intracavity, thereby realize linkage output power and give the casing. And the third casing deviates from and is the grafting structure between separation disc one side and the first gear, therefore the rotation power of third casing can be exported first gear, transmits the driving tooth by first gear again, finally transmits the extending structure in the first telescopic link by the transmission shaft.

As a preference: the overload protection mechanism 12 includes a third casing 14 with one end inserted into the first gear 13, a column receiving groove 15 is provided on one side of the third casing 14 departing from the first gear 13, a first through hole 16 is provided on the bottom surface of the column receiving groove 15 for the first rotating shaft 11 to pass through, a separating disc 17 is slidably connected to the outer side wall of the first rotating shaft 11 located in the column receiving groove 15, a gasket 18 is provided on one side of the column receiving groove 15 away from the separating disc 17, the outer side wall of the gasket 18 is attached to the inner side wall of the column receiving groove 15, a first spring 19 is provided between the gasket 18 and the separating disc 17, a plurality of first limiting grooves 20 are provided at circumferential intervals on the end surface of the separating disc 17 close to one side of the bottom surface of the column receiving groove 15, and a plurality of first limiting protrusions 21 capable of being in limiting fit with. First pivot passes behind the first holding chamber lateral wall to be connected with the motor rotation, and when transshipping, the gasket of first pivot lateral wall deviates from first spring one end and the inboard wall laminating that first holding chamber is close to motor one side. When no overload exists, the outer side wall of the gasket is in interference fit with the inner side wall of the columnar containing groove.

As a preference: the outer side wall of one side of the third shell 14, which is far away from the column-shaped accommodating groove 15, is provided with a second limiting groove 22 in the circumferential direction, and the outer side wall of one side of the first gear 13, which is near to the third shell 14, is provided with a second limiting protrusion 23 which can be inserted into the second limiting groove 22.

As a preference: a second accommodating cavity 24 is arranged in the switching part 5, one end of the first accommodating cavity 7, which is provided with a first gear 13, is communicated with the second accommodating cavity 24, a third rotating mechanism 10 is rotationally connected in the second accommodating cavity 24, the third rotating mechanism 10 comprises a second rotating shaft 25 rotationally connected in the second accommodating cavity 24, the outer side wall of the second rotating shaft 25 is rotationally connected with a transmission gear 26, the transmission gear 26 is meshed with the first gear 13, and the transmission gear 26 is in transmission connection with the first rotating mechanism 4 in the first shell 3.

As a preference: be equipped with third holding chamber 27 in the first casing 3, third holding chamber 27 and second holding chamber 24 intercommunication, first rotation mechanism 4 is including rotating the second gear 28 of connecting in third holding chamber 27, and the lateral wall of second gear 28 and drive gear 26 meshing, and the lateral wall of second gear 28 rotates and is connected with bearing 29, and bearing 29 lateral wall and the inboard wall of third holding chamber 27 touch, the first telescopic link 1 of fixedly connected with in the third holding chamber 27.

As a preference: the first telescopic rod 1 comprises a first pipe sleeve 30 and a second pipe sleeve 31, one end of the first pipe sleeve 30 is fixedly connected in the third accommodating cavity 27, the second pipe sleeve 31 is slidably connected in the first pipe sleeve 30, one end of the first pipe sleeve 30, which is far away from the first shell 3, is provided with a second through hole 32 through which the second pipe sleeve 31 can slide out, the first pipe sleeve 30 and the second pipe sleeve 31 are slidably connected with a telescopic structure 2, the telescopic structure 2 comprises a first screw rod 33 which is rotatably connected in the first pipe sleeve 30, one end of the first screw rod 33 extends into the third accommodating cavity 27 and is fixedly connected with a second gear 28, the outer side wall, far away from the second gear 28, of the first screw rod 33 is in threaded connection with a screw nut 34, one end of the second pipe sleeve 31 is fixedly connected with one side, which is far away from the first pipe sleeve 30, one end, far away from the first pipe sleeve 30, of the second pipe sleeve 31 is fixedly connected with a first ball, one end of the second spring 36 far away from the first shell 3 is fixedly connected with the first bulb 35.

As a preference: the outer side wall of the first rotating shaft 11 is circumferentially provided with a sliding block 37, the center of the separating disc 17 is provided with a third through hole 38 through which the first rotating shaft 11 can pass, the inner side wall of the third through hole 38 is provided with a sliding groove 39 through which the sliding block 37 can be embedded and matched to limit sliding, 12 first limiting grooves 20 are circumferentially arranged on the separating disc 17 at intervals near the end surface on one side of the bottom surface of the

column accommodating groove

15, and 12 first limiting protrusions 21 which can be matched with the first limiting grooves 20 in a limiting manner are circumferentially arranged on the bottom surface of the column accommodating groove 15.

As a preference: the inner side wall of one side, close to the first gear 13, of the first accommodating cavity 7 is provided with a fourth accommodating cavity 44, a resistance structure 40 is arranged in the fourth accommodating cavity 44, the resistance structure 40 comprises a friction structure 45 and a third spring 42, a gasket 47 is arranged between the third spring 42 and the first gear 13, one side, away from the first gear 13, of the third spring 42 is abutted against the friction structure 45, the friction structure 45 comprises a first pressing piece 41 and a second pressing piece 46, a friction piece 43 is arranged between the first pressing piece 41 and the second pressing piece 46, one side, away from the friction piece 43, of the first pressing piece 41 is abutted against the inner side wall of the fourth accommodating cavity 44, and one side, away from the first pressing piece 41, of the second pressing piece 46 is abutted against one side, away from the gasket 47. When electronic vaulting pole extends and contracts in this technical scheme, the resistance structure begins work, can increase first gear pivoted resistance and contribute for electronic vaulting pole, and then offset the dead weight problem of car tail-gate effectively, can let the car tail-gate hover in any position, the switch door is steady, and the self-defined height of opening the door promotes to use and experiences.

Claims

1. The utility model provides a take overload protection's electronic vaulting pole, includes the scalable body of rod of electronic vaulting pole, sliding connection has in the scalable body of rod can order about the flexible first telescopic link (1) of electronic vaulting pole, be equipped with extending structure (2), its characterized in that in first telescopic link (1): one end of the first telescopic rod (1) is fixedly connected with a first shell (3), a first rotating mechanism (4) which drives the telescopic structure (2) to stretch is connected in the first shell (3) in a rotating mode, a second shell (6) is fixedly connected to the outer side wall of the first shell (3) through a switching portion (5), a first accommodating cavity (7) is formed in the second shell (6), a second rotating mechanism (8) is connected in the first accommodating cavity (7) in a rotating mode, a motor (9) which drives the second rotating mechanism (8) to rotate is further arranged in the second shell (6), a third rotating mechanism (10) is arranged in the switching portion (5), the second rotating mechanism (8) is rotatably connected with the first rotating mechanism (4) through the third rotating mechanism (10), the second rotating mechanism (8) comprises a first rotating shaft (11) of which one end is rotatably connected with the motor (9), first pivot (11) lateral wall rotates and is connected with overload protection mechanism (12), motor (9) and overload protection mechanism (12) one side are kept away from in first holding chamber (7) and are rotated and be connected with first gear (13), motor (9) one end male through-hole is kept away from in first gear (13) center is equipped with and supplies first pivot (11), overload protection mechanism (12) are pegged graft with first gear (13) lateral wall, first gear (13) rotate through third slewing mechanism (10) and are connected first slewing mechanism (4).

2. The electric support rod with overload protection according to claim 1, characterized in that: the overload protection mechanism (12) comprises a third shell (14) with one end connected with the first gear (13) in an inserting mode, a column-shaped containing groove (15) is formed in one side, away from the first gear (13), of the third shell (14), a first through hole (16) allowing the first rotating shaft (11) to pass through transversely is formed in the bottom surface of the column-shaped containing groove (15), a separating disc (17) is connected to the outer side wall of the first rotating shaft (11) in the column-shaped containing groove (15) in a sliding mode, a gasket (18) is arranged on one side, away from the separating disc (17), of the column-shaped containing groove (15), the outer side wall of the gasket (18) is attached to the inner side wall of the column-shaped containing groove (15), a first spring (19) is arranged between the gasket (18) and the separating disc (17), and a plurality of first limiting grooves (20) are circumferentially arranged on the end face, the bottom surface of the columnar containing groove (15) is circumferentially provided with a plurality of first limiting bulges (21) which can be in limiting fit with the first limiting grooves (20).

3. The electric support rod with overload protection according to claim 2, characterized in that: the outer side wall of one side, far away from the columnar containing groove (15), of the third shell (14) is provided with a second limiting groove (22) in the circumferential direction, and the outer side wall of one side, close to the third shell (14), of the first gear (13) is provided with a second limiting protrusion (23) capable of being inserted into the second limiting groove (22).

4. The electric support rod with overload protection according to claim 1, characterized in that: be equipped with second holding chamber (24) in switching portion (5), second holding chamber (24) are equipped with first gear (13) one end intercommunication with first holding chamber (7), second holding chamber (24) internal rotation is connected with third slewing mechanism (10), third slewing mechanism (10) are including rotating second pivot (25) of connecting in second holding chamber (24), second pivot (25) lateral wall rotates and is connected with drive gear (26), drive gear (26) and first gear (13) meshing, drive gear (26) are connected with first slewing mechanism (4) transmission in first casing (3).

5. The electric support rod with overload protection according to claim 4, wherein: be equipped with third holding chamber (27) in first casing (3), third holding chamber (27) and second holding chamber (24) intercommunication, first slewing mechanism (4) are including rotating second gear (28) of connecting in third holding chamber (27), second gear (28) lateral wall and drive gear (26) meshing, second gear (28) lateral wall rotates and is connected with bearing (29), bearing (29) lateral wall and third holding chamber (27) medial wall touch, fixedly connected with first telescopic link (1) in third holding chamber (27).

6. The electric support rod with overload protection according to claim 5, wherein: the first telescopic rod (1) comprises a first pipe sleeve (30) with one end fixedly connected in a third accommodating cavity (27) and a second pipe sleeve (31) connected in the first pipe sleeve (30) in a sliding manner, one end, far away from a first shell (3), of the first pipe sleeve (30) is provided with a second through hole (32) through which the second pipe sleeve (31) can slide out, the first pipe sleeve (30) and the second pipe sleeve (31) are connected with a telescopic structure (2) in a sliding manner, the telescopic structure (2) comprises a first lead screw (33) rotatably connected in the first pipe sleeve (30), one end of the first lead screw (33) extends into the third accommodating cavity (27) to be fixedly connected with the outer side wall of a second gear (28), the outer side wall, far away from the second gear (28), of the first lead screw (33) is in threaded connection with a lead screw nut (34), one end of the second pipe sleeve (31) is fixedly connected with the lead screw nut (34) to one side, far away from the, one end, far away from the first pipe sleeve (30), of the second pipe sleeve (31) is fixedly connected with a first ball head (35), a second spring (36) is arranged on the outer side wall of the first telescopic rod (1) in the circumferential direction, one end of the second spring (36) is fixedly connected with the outer side wall of the first shell (3), and one end, far away from the first shell (3), of the second spring (36) is fixedly connected with the first ball head (35).

7. The electric support rod with overload protection according to claim 2, characterized in that: first pivot (11) lateral wall circumference is equipped with slider (37), separation disc (17) center is equipped with third through-hole (38) that can supply first pivot (11) to pass, third through-hole (38) inside wall is equipped with and supplies slider (37) embedding cooperation spacing gliding spout (39), separation disc (17) are close to the terminal surface circumference interval of column storage tank (15) bottom surface one side and are equipped with 12 first spacing recesses (20), column storage tank (15) bottom surface circumference interval is equipped with 12 can with first spacing recess (20) spacing complex first spacing arch (21).

8. The electric support rod with overload protection according to claim 1, characterized in that: a fourth accommodating cavity (44) is arranged on the inner side wall of one side of the first accommodating cavity (7) close to the first gear (13), a resistance structure (40) is arranged in the fourth accommodating cavity (44), the resistance structure (40) comprises a friction structure (45) and a third spring (42), a washer (47) is arranged between the third spring (42) and the first gear (13), one side of the third spring (42) far away from the first gear (13) is propped against the friction structure (45), the friction structure (45) comprises a first pressing sheet (41) and a second pressing sheet (46), a friction plate (43) is arranged between the first pressing plate (41) and the second pressing plate (46), one side of the first pressing sheet (41) far away from the friction sheet (43) is abutted against the inner side wall of the fourth accommodating cavity (44), the side of the second pressing piece (46) far away from the first pressing piece (41) is abutted against the side of the third spring (42) far away from the washer (47).