CN210530589U - Double-outer-tube support rod mechanism - Google Patents

Abstract

The utility model relates to a brace rod mechanism, in particular to a double-outer-tube brace rod mechanism, which mainly comprises a large outer tube, a small outer tube, an inner tube, a wear-resistant sleeve, a screw rod guide tube, an outer tube end cover, an inner tube end cover, an outer tube seat, an inner tube seat, a first ball head connecting piece and a second ball head connecting piece; the pipe orifice of the upper shaft section of the large outer pipe is in limited installation and combination with the outer pipe seat and is fixedly connected with an outer pipe end cover for fixing the first ball head connecting piece through the outer pipe seat; the small outer pipe is sleeved on the upper shaft section in the large outer pipe; the pipe orifice of the lower shaft section of the large outer pipe is installed with the wear-resistant sleeve in a matched manner through a buckle and then sleeved outside the inner pipe, the inner pipe can slide up and down relative to the large outer pipe along the axial direction, and an annular channel is enclosed between the inner wall of the large outer pipe and the outer wall of the inner pipe; the utility model has the advantages that the structure of the brace rod mechanism is more stable through the design of the large outer tube and the small outer tube; the wear-resistant sleeve is arranged, so that the large outer pipe and the inner pipe are not in direct contact and are not easy to wear, the whole structure of the stay bar mechanism is attractive and elegant, the assembly operation is simple, and the practicability is high.

Description

Double-outer-tube support rod mechanism

Technical Field

The utility model relates to a vaulting pole mechanism specifically indicates a two outer tube vaulting pole mechanisms.

Background

With the continuous improvement of the living standard of people, the demand of automobiles is also continuously increased, and in daily activities at ordinary times, the automobiles are generally used for visiting friends and friends, traveling in outings and working trips, and the automobiles become necessary transportation tools for the public slowly; the performance and low noise of an automobile are the most important concerns of people, particularly, a stay bar mechanism of an automobile tail door is a very important part in the process of using the automobile tail door, the stay bar mechanism mainly comprises an inner pipe, an outer pipe, a motor, an end cover and the like, the stay bar mechanism on the market at present is mainly of a single outer pipe structure, the inner pipe is in direct contact with the outer pipe, and in repeated door opening and closing operations, the inner pipe and the outer pipe of the stay bar mechanism are repeatedly rubbed and easily damaged, so that bad noise is generated, and the service life of the stay bar mechanism is short; the end cover of the stay bar mechanism on the market is unreasonable in structural design, and when the tail gate is closed, the stay bar mechanism is in the rain guide groove, and water easily enters the stay bar mechanism in rainy days or wet days, so that a motor and other electronic elements are damaged, and the function failure and unstable performance of the stay bar are caused; therefore, how to solve the problems of short service life, high noise and unstable performance of the automobile tail gate stay bar mechanism is an important technical problem to be solved by the technical personnel in the field.

Disclosure of Invention

In order to solve the above problem, the utility model aims at disclosing a brace rod mechanism, in particular to a double outer tube brace rod mechanism.

In order to achieve the above object, the utility model adopts the following technical scheme: a double-outer-tube support rod mechanism comprises a large outer tube, a small outer tube, an inner tube, a wear-resistant sleeve, a screw rod guide tube, an outer tube end cover, an inner tube end cover, an outer tube seat, an inner tube seat, a first ball head connecting piece, a second ball head connecting piece, a speed reducing motor, a circuit board, a four-pole magnetic sheet, a screw rod and a spring; the large outer pipe is a hollow straight round pipe, and the pipe orifice of the upper shaft section of the large outer pipe is in limit installation and combination with the outer pipe base and is fixedly connected with the outer pipe end cover for fixing the first ball head connecting piece through the outer pipe base; the pipe orifice of the lower shaft section of the large outer pipe is installed with a wear-resistant sleeve in a matched mode through a buckle and then sleeved on the outer side of the inner pipe, the inner pipe is a hollow straight circular pipe, the outer wall of the wear-resistant sleeve is attached and fixed to the inner wall of the large outer pipe, the inner wall of the wear-resistant sleeve is connected with the outer wall of the inner pipe in a sliding mode, the inner pipe can slide up and down relative to the large outer pipe along the axial direction, and an annular channel is formed between the inner wall of; the lower shaft section of the inner pipe is in limiting installation with the inner pipe base and is fixedly connected with an inner pipe end cover for fixing a second ball head connecting piece through the inner pipe base; the small outer pipe is of a reducing circular pipe structure with a large upper part and a small lower part and comprises a large-diameter section and a small-diameter section, the small outer pipe is fixedly sleeved on the upper shaft section in the large outer pipe and is coaxially arranged with the large outer pipe, and the pipe orifice end of the large-diameter section of the small outer pipe is clamped on the outer pipe seat; the circuit board, the four-pole magnetic sheet and the speed reducing motor are sequentially arranged inside the large-diameter section of the small outer tube along the axial direction of the small outer tube; install bearing frame and bearing in the path section of little outer tube, the lead screw passes and is connected with gear motor transmission behind the bearing, the lead screw outside cover is equipped with nut and nut sleeve, nut sheathed tube one end and nut fixed connection, nut sheathed tube other end and inner tube seat fixed connection, and the lead screw pipe is established to nut sleeve outside cover, and the spring is established to lead screw pipe outside cover, the both ends of spring all are equipped with spring locating pin, and the one end of spring is passed through spring locating pin and is connected on the bearing frame, and the other end of spring passes through spring locating pin and connects on the inner tube seat.

Preferably, the outer tube end cover is an integrated structure consisting of an upper long cylinder structure and a lower flat cylinder structure, wherein the outer wall of the upper long cylinder structure is provided with a reinforcing rib, the outer tube end cover is integrally formed into an L shape, a stepped bulge I with internal threads is arranged in the middle of the upper end face of the lower flat cylinder structure and used for being in threaded connection with the first ball head connecting piece, and a waterproof sealing ring I is annularly arranged in the stepped bulge I.

Preferably, the outer tube seat is formed into a structure with a large upper part and a small lower part, two sides of the structure are in a step-shaped structure, the upper part of the side wall of the outer tube seat is provided with a plurality of limiting key grooves I, a limiting block I corresponding to the limiting key grooves I of the outer tube seat is arranged at the position of an upper shaft section of the large outer tube, and the outer tube seat and the large outer tube are in interference fit; the lower part of the side wall of the outer pipe seat is provided with a plurality of limiting key grooves II, and the pipe orifice end of the large-diameter section of the small outer pipe is provided with a limiting block II corresponding to the limiting key grooves II of the outer pipe seat; a circle of limiting groove I is circumferentially formed in the upper end of the side wall of the outer tube seat, and a barb block I corresponding to the limiting groove I of the outer tube seat is arranged on the inner wall of the end cover of the outer tube; circular recess I has been seted up to outer tube seat up end intermediate position, its tip butt is in circular recess I after first bulb connecting piece and outer tube end cover spiro union.

Preferably, the middle part of the end face of the inner pipe end cover is provided with a stepped bulge II with internal threads for being in threaded connection with the second ball head connecting piece, and a waterproof sealing ring II is annularly arranged in the stepped bulge II.

Preferably, the inner tube base is formed into a structure with a small upper part and a large lower part, two sides of the structure are in a step-shaped structure, the lower part of the side wall of the inner tube base is provided with a plurality of limiting key grooves III, the lower shaft section of the inner tube is provided with limiting blocks III corresponding to the limiting key grooves III of the inner tube base, and the inner tube base and the inner tube are in interference fit; a plurality of limiting key grooves IV are formed in the upper portion of the side wall of the inner pipe base, and limiting blocks IV corresponding to the limiting key grooves IV are arranged at one end, connected with the inner pipe base, of the nut sleeve; a circle of limiting groove II is circumferentially arranged at the lower end of the side wall of the inner tube seat, and an inverted hook block II corresponding to the limiting groove II of the inner tube seat is arranged on the inner wall of the inner tube end cover; a circular groove II is formed in the middle of the lower end face of the inner pipe base, and the end portion of the second ball head connecting piece is abutted to the circular groove II after the second ball head connecting piece is connected with the inner pipe end cover in a threaded mode.

Preferably, the inner wall of the small-diameter section of the small outer pipe is provided with at least two arc-shaped protrusions along the axial direction, and the outer wall of the bearing seat is provided with arc-shaped clamping recesses corresponding to the arc-shaped protrusions.

Preferably, one end of the screw rod, which is far away from the speed reducing motor, is provided with an annular clamping block.

Preferably, the wear-resistant sleeve is made of POM plastic; the large outer pipe and the inner pipe are both made of metal materials; the outer pipe end cover and the inner pipe end cover are both made of rubber.

Preferably, the inner wall of the top end of the upper long cylinder structure of the outer tube end cover is annularly provided with a waterproof sealing ring III.

Preferably, the diameters of the large outer pipe, the small outer pipe large-diameter section, the small outer pipe small-diameter section and the inner pipe are respectively set to be D1, D2, D3 and D4, and D1 > D2 > D4 > D3 is satisfied.

The beneficial effects of the utility model are embodied in: the utility model designs a double outer tube brace rod mechanism, which has more stable structure through the design of large and small outer tubes; the wear-resistant sleeve is arranged, so that the large outer pipe and the inner pipe are not in direct contact and are not easy to wear; the structure of the end cover of the outer pipe is improved, the waterproof layer is arranged, the waterproof performance of the stay bar mechanism is improved, and the service life of the stay bar mechanism is prolonged; big outer tube, inner tube set up to straight pipe for vaulting pole mechanism's outward appearance has more the aesthetic feeling, the utility model discloses overall structure elegant appearance, assembly easy operation, the practicality is strong.

Drawings

Fig. 1 is a general sectional view of the double outer tube stay mechanism of the present invention in a retracted state when the door is closed.

Fig. 2 is a sectional view of the double outer tube stay mechanism of the present invention in an extended state when the door is opened.

Fig. 3 is an overall structure diagram of the double outer tube brace mechanism of the present invention.

Fig. 4 is a structural view of the outer tube end cap of the present invention.

Fig. 5 is a structural view of the inner tube end cap of the present invention.

Fig. 6 is a structural view of the outer tube base of the present invention.

Reference is made to the accompanying drawings in which:

1-large outer tube, 2-small outer tube, 3-inner tube, 4-wear-resistant sleeve, 5-screw rod guide tube, 6-outer tube end cover, 7-inner tube end cover, 8-outer tube seat, 9-inner tube seat, 10-first ball head connecting piece, 11-second ball head connecting piece, 12-speed reducing motor, 13-circuit board, 14-quadrupole magnetic sheet, 15-screw rod, 16-spring, 17-nut, 18-nut sleeve, 19-annular clamping block, 20-upper long cylinder structure, 21-lower flat cylinder structure, 22-stepped protrusion I, 23-stepped protrusion II, 24-limiting key groove I, 25-limiting key groove II and 26-limiting groove I.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:

the utility model provides a double-outer-tube support rod mechanism, which comprises a large outer tube 1, a small outer tube 2, an inner tube 3, a wear-resistant sleeve 4, a screw rod guide tube 5, an outer tube end cover 6, an inner tube end cover 7, an outer tube seat 8, an inner tube seat 9, a first ball head connecting piece 10, a second ball head connecting piece 11, a speed reducing motor 12, a circuit board 13, a quadrupole magnetic sheet 14, a screw rod 15 and a spring 16; the large outer pipe 1 is a hollow straight round pipe, and the pipe orifice of the upper shaft section of the large outer pipe 1 is in limit installation with the outer pipe base 8 and is fixedly connected with the outer pipe end cover 6 for fixing the first ball head connecting piece 10 through the outer pipe base 8; the pipe orifice of the lower shaft section of the large outer pipe 1 is installed with the wear-resistant sleeve 4 in a buckling fit mode and then sleeved on the outer side of the inner pipe 3, the inner pipe 3 is arranged to be a hollow straight circular pipe, the outer wall of the wear-resistant sleeve 4 is attached and fixed to the inner wall of the large outer pipe 1, the inner wall of the wear-resistant sleeve 4 is connected with the outer wall of the inner pipe 3 in a sliding mode, the inner pipe 3 can slide up and down relative to the large outer pipe 1 along the axial direction, and an annular channel is defined between the inner; preferably, the large outer pipe 1 and the inner pipe 3 are both made of metal, the wear-resistant sleeve 4 is made of POM plastic, the large outer pipe 1 and the inner pipe 3 of the traditional stay bar mechanism are in direct contact, and the stay bar mechanism is easily damaged and generates bad noise due to repeated friction; the large outer pipe 1 and the inner pipe 3 are both hollow straight round pipes and are made of metal materials, in the embodiment, the outer surfaces of the large outer pipe 1 and the inner pipe 3 are subjected to electrode oxidation treatment, so that the whole appearance of the stay bar mechanism is firm and attractive;

the lower shaft section of the inner pipe 3 is in limit assembly with an inner pipe seat 9 and is fixedly connected with an inner pipe end cover 7 for fixing a second ball head connecting piece 11 through the inner pipe seat 9; the small outer pipe 2 is of a reducing circular pipe structure with a large upper part and a small lower part and comprises a large-diameter section and a small-diameter section, the small outer pipe 2 is fixedly sleeved on the upper shaft section in the large outer pipe 1 and is coaxially arranged with the large outer pipe 1, and the pipe orifice end of the large-diameter section of the small outer pipe 2 is clamped on the outer pipe seat 8; the circuit board 13, the four-pole magnetic sheet 14 and the speed reducing motor 12 are sequentially arranged inside the large-diameter section of the small outer tube 2 along the axial direction of the small outer tube 2; a bearing seat and a bearing are installed in the small-diameter section of the small outer pipe 2, preferably, at least two arc-shaped bulges are axially arranged on the inner wall of the small-diameter section of the small outer pipe 2, and arc-shaped clamping recesses corresponding to the arc-shaped bulges are arranged on the outer wall of the bearing seat; the screw rod 15 penetrates through the bearing and then is in transmission connection with the speed reducing motor 12, a nut 17 and a nut sleeve 18 are sleeved on the outer side of the screw rod 15, preferably, an annular clamping block 19 is installed at one end, far away from the speed reducing motor 12, of the screw rod 15 to limit the stroke of the nut 17, when the speed reducing motor 12 drives the screw rod 15 to rotate, the nut 17 moves up and down in the axial direction of the screw rod 15, and the annular clamping block 19 is arranged to prevent the nut 17 from being separated from the screw rod 15 in the moving process; one end of a nut sleeve 18 is fixedly connected with a nut 17, the other end of the nut sleeve 18 is fixedly connected with an inner tube base 9, a lead screw guide pipe 5 is sleeved outside the nut sleeve 18, the lead screw guide pipe 5 enables a support rod mechanism to be more stable in the expansion process and reduces shaking and noise, a spring 16 is sleeved outside the lead screw guide pipe, spring 16 positioning pins are arranged at two ends of the spring 16, one end of the spring 16 is connected to the bearing base through the spring 16 positioning pin, and the other end of the spring 16 is connected to the inner tube base 9 through the spring 16 positioning pin; further, the diameters of the large outer tube 1, the large diameter section of the small outer tube 2, the small diameter section of the small outer tube 2 and the inner tube 3 are respectively set to be D1, D2, D3 and D4, and D1 > D2 > D4 > D3; when the compression of the double-outer-tube support rod mechanism reaches the shortest, the upper end of the inner tube 3 abuts against the outer wall of the small-diameter section of the small outer tube 2, and when the stretching of the double-outer-tube support rod mechanism reaches the longest, the upper end of the inner tube 3 is positioned in the lower shaft section tube body of the large outer tube 1; preferably, the outer tube end cover 6 and the inner tube end cover 7 are both made of rubber;

specifically, the outer tube end cover 6 is an integrated structure consisting of an upper long cylinder structure 20 and a lower flat cylinder structure 21, wherein reinforcing ribs are arranged on the outer wall of the upper long cylinder structure 20, the outer tube end cover 6 is integrally formed into an L shape, a stepped bulge I22 with internal threads is arranged in the middle of the upper end face of the lower flat cylinder structure 21 and used for being in threaded connection with the first ball head connecting piece 10, a waterproof sealing ring I is annularly arranged in the stepped bulge I22, and a waterproof sealing ring III is annularly arranged on the inner wall of the top end of the upper long cylinder structure 20 of the outer tube end cover 6, so that the waterproof effect is enhanced; the outer pipe seat 8 is formed into a structure with a large upper part and a small lower part, two sides of the structure are in a step shape, the upper part of the side wall of the outer pipe seat 8 is provided with a plurality of limiting key grooves I24, a limiting block I corresponding to the limiting key grooves I24 of the outer pipe seat 8 is arranged at the pipe orifice of the upper shaft section of the large outer pipe 1, the outer pipe seat 8 and the large outer pipe 1 are in interference fit, and the waterproof performance between the outer pipe seat 8 and the large outer pipe 1 is further enhanced; the lower part of the side wall of the outer tube seat 8 is provided with a plurality of limiting key grooves II 25, and the tube mouth end of the large-diameter section of the small outer tube 2 is provided with a limiting block II corresponding to the limiting key grooves II 25 of the outer tube seat 8; a circle of limiting groove I26 is circumferentially arranged at the upper end of the side wall of the outer tube seat 8, and a barb block I corresponding to the limiting groove I26 of the outer tube seat 8 is arranged on the inner wall of the outer tube end cover 6; a circular groove I is formed in the middle of the upper end face of the outer tube seat 8, and the end of the first ball head connecting piece 10 is abutted in the circular groove I after being in threaded connection with the outer tube end cover 6;

specifically, a stepped bulge II 23 with internal threads is arranged in the middle of the end face of the inner tube end cover 7 and is used for being in threaded connection with the second ball head connecting piece 11, and a waterproof sealing ring II is annularly arranged in the stepped bulge II 23 to enhance the waterproof performance; the inner pipe seat 9 is formed into a structure with a small upper part and a large lower part, two sides of the structure are in a step-shaped structure, the lower part of the side wall of the inner pipe seat 9 is provided with a plurality of limiting key grooves III, the lower shaft section of the inner pipe 3 is provided with limiting blocks III corresponding to the limiting key grooves III of the inner pipe seat 9, the inner pipe seat 9 and the inner pipe 3 are in interference fit, and the waterproof performance between the inner pipe seat 9 and the inner pipe 3 is further enhanced; a plurality of limiting key grooves IV are formed in the upper portion of the side wall of the inner tube seat 9, and limiting blocks IV corresponding to the limiting key grooves IV are arranged at one end, connected with the inner tube seat 9, of the nut sleeve 18; a circle of limiting groove II is circumferentially arranged at the lower end of the side wall of the inner tube seat 9, and an inverted hook block II corresponding to the limiting groove II of the inner tube seat 9 is arranged on the inner wall of the inner tube end cover 7; a circular groove II is formed in the middle of the lower end face of the inner tube seat 9, and the end part of the second ball head connecting piece 11 is abutted in the circular groove II after being in threaded connection with the inner tube end cover 7; the waterproof sealing ring I, the waterproof sealing ring II and the waterproof sealing ring III can be preferably made of plastic or rubber in the embodiment, and the embodiment can ensure that electric elements such as the speed reducing motor 12, the circuit board 13 and the like cannot enter water when the stay bar mechanism is in water spraying or water immersion;

the double-outer-tube support rod mechanism has the advantages that the structure of the support rod mechanism is more stable through the design of the large outer tube 2 and the small outer tube 2; the wear-resistant sleeve 4 is arranged, so that the large outer pipe 1 and the inner pipe 3 are not in direct contact and are not easy to wear; the large outer pipe 1 and the inner pipe 3 are arranged into straight round pipes, so that the appearance of the stay bar mechanism is more attractive; the structure of the outer tube end cover 6 is improved, the waterproof layer is arranged, the waterproof performance of the support rod mechanism is improved, and the service life of the support rod mechanism is prolonged.

Above, only the preferred embodiment of the present invention is not right the technical scope of the present invention makes any restriction, and the technical personnel in this industry can make some deformations and modifications under this technical scheme's enlightenment, all the basis the utility model discloses a technical essence is to any modification, the equivalent change and the modification of making of above embodiment, all still belong to the technical scheme's scope of the present invention.

Claims (10)

1. A double-outer-tube support rod mechanism is characterized by comprising a large outer tube, a small outer tube, an inner tube, a wear-resistant sleeve, a screw rod guide tube, an outer tube end cover, an inner tube end cover, an outer tube seat, an inner tube seat, a first ball head connecting piece, a second ball head connecting piece, a speed reducing motor, a circuit board, a quadrupole magnetic sheet, a screw rod and a spring; the large outer pipe is a hollow straight round pipe, and the pipe orifice of the upper shaft section of the large outer pipe is in limit installation and combination with the outer pipe base and is fixedly connected with the outer pipe end cover for fixing the first ball head connecting piece through the outer pipe base; the pipe orifice of the lower shaft section of the large outer pipe is installed with a wear-resistant sleeve in a matched mode through a buckle and then sleeved on the outer side of the inner pipe, the inner pipe is a hollow straight circular pipe, the outer wall of the wear-resistant sleeve is attached and fixed to the inner wall of the large outer pipe, the inner wall of the wear-resistant sleeve is connected with the outer wall of the inner pipe in a sliding mode, the inner pipe can slide up and down relative to the large outer pipe along the axial direction, and an annular channel is formed between the inner wall of; the lower shaft section of the inner pipe is in limiting installation with the inner pipe base and is fixedly connected with an inner pipe end cover for fixing a second ball head connecting piece through the inner pipe base; the small outer pipe is of a reducing circular pipe structure with a large upper part and a small lower part and comprises a large-diameter section and a small-diameter section, the small outer pipe is fixedly sleeved on the upper shaft section in the large outer pipe and is coaxially arranged with the large outer pipe, and the pipe orifice end of the large-diameter section of the small outer pipe is clamped on the outer pipe seat; the circuit board, the four-pole magnetic sheet and the speed reducing motor are sequentially arranged inside the large-diameter section of the small outer tube along the axial direction of the small outer tube; install bearing frame and bearing in the path section of little outer tube, the lead screw passes and is connected with gear motor transmission behind the bearing, the lead screw outside cover is equipped with nut and nut sleeve, nut sheathed tube one end and nut fixed connection, nut sheathed tube other end and inner tube seat fixed connection, and the lead screw pipe is established to nut sleeve outside cover, and the spring is established to lead screw pipe outside cover, the both ends of spring all are equipped with spring locating pin, and the one end of spring is passed through spring locating pin and is connected on the bearing frame, and the other end of spring passes through spring locating pin and connects on the inner tube seat.

2. The double-outer-tube stay bar mechanism as claimed in claim 1, wherein the outer tube end cap is an integrated structure consisting of an upper long cylinder structure and a lower flat cylinder structure, wherein the outer wall of the upper long cylinder structure is provided with a reinforcing rib, the outer tube end cap is integrally formed into an L shape, a stepped protrusion I with internal threads is arranged in the middle of the upper end face of the lower flat cylinder structure and is used for being in threaded connection with the first ball head connecting piece, and a waterproof sealing ring I is annularly arranged in the stepped protrusion I.

3. The stay bar mechanism with the double outer pipes as claimed in claim 1 or 2, wherein the outer pipe seat is formed into a structure with a large upper part and a small lower part, two sides of the structure are in a step shape, the upper part of the side wall of the outer pipe seat is provided with a plurality of limiting key slots I, the pipe orifice of the upper shaft section of the large outer pipe is provided with a limiting block I corresponding to the limiting key slots I of the outer pipe seat, and the outer pipe seat and the large outer pipe are in interference fit; the lower part of the side wall of the outer pipe seat is provided with a plurality of limiting key grooves II, and the pipe orifice end of the large-diameter section of the small outer pipe is provided with a limiting block II corresponding to the limiting key grooves II of the outer pipe seat; a circle of limiting groove I is circumferentially formed in the upper end of the side wall of the outer tube seat, and a barb block I corresponding to the limiting groove I of the outer tube seat is arranged on the inner wall of the end cover of the outer tube; circular recess I has been seted up to outer tube seat up end intermediate position, its tip butt is in circular recess I after first bulb connecting piece and outer tube end cover spiro union.

4. The stay bar mechanism of a double outer tube of claim 1, wherein a stepped protrusion II with internal threads is arranged in the middle of the end surface of the end cover of the inner tube and is used for being in threaded connection with a second ball head connecting piece, and a waterproof sealing ring II is annularly arranged in the stepped protrusion II.

5. The stay bar mechanism with double outer pipes as claimed in claim 1 or 4, wherein the inner pipe seat is formed into a structure with a small top and a big bottom, and two sides of the inner pipe seat are in a step-shaped structure, the lower part of the side wall of the inner pipe seat is provided with a plurality of limit key slots III, the lower shaft section of the inner pipe is provided with a limit block III corresponding to the limit key slots III of the inner pipe seat, and the inner pipe seat and the inner pipe are in interference fit; a plurality of limiting key grooves IV are formed in the upper portion of the side wall of the inner pipe base, and limiting blocks IV corresponding to the limiting key grooves IV are arranged at one end, connected with the inner pipe base, of the nut sleeve; a circle of limiting groove II is circumferentially arranged at the lower end of the side wall of the inner tube seat, and an inverted hook block II corresponding to the limiting groove II of the inner tube seat is arranged on the inner wall of the inner tube end cover; a circular groove II is formed in the middle of the lower end face of the inner pipe base, and the end portion of the second ball head connecting piece is abutted to the circular groove II after the second ball head connecting piece is connected with the inner pipe end cover in a threaded mode.

6. The stay bar mechanism with the double outer tubes as claimed in claim 1, wherein the inner wall of the small diameter section of the small outer tube is provided with at least two arc-shaped protrusions along the axial direction, and the outer wall of the bearing seat is provided with arc-shaped clamping recesses corresponding to the arc-shaped protrusions.

7. The double outer tube stay bar mechanism of claim 1 wherein an annular clamping block is mounted on the end of the lead screw remote from the gear motor.

8. The stay bar mechanism with double outer tubes as claimed in claim 1, wherein the wear-resistant sleeve is made of POM plastic material; the large outer pipe and the inner pipe are both made of metal materials; the outer pipe end cover and the inner pipe end cover are both made of rubber.

9. The double-outer-tube stay bar mechanism as claimed in claim 2, wherein the inner wall of the top end of the upper long cylindrical structure of the outer tube end cover is annularly provided with a waterproof sealing ring III.

10. The double outer tube brace rod mechanism of claim 1, wherein the diameters of the large outer tube, the small outer tube large diameter section, the small outer tube small diameter section and the inner tube are respectively set to be D1, D2, D3 and D4, and D1 > D2 > D4 > D3 is satisfied.

Images