CN210859468U

CN210859468U - Carbon fiber telescopic centering rod

Info

Publication number: CN210859468U
Application number: CN201921239116.5U
Authority: CN
Inventors: 杨章君; 单家义
Original assignee: Shenzhen Liangdao Technology Co ltd
Current assignee: Shenzhen Liangdao Technology Co ltd
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-06-26
Anticipated expiration: 2029-07-30

Abstract

The utility model relates to a carbon fiber telescopic centering rod, which comprises an outer pipe, an inner pipe and a pipe body locking block, wherein the pipe wall of the inner pipe is provided with scales and a positioning metal strip; the pipe body locking block comprises a lower pipe body locking block, an upper pipe body locking block and a clamping part positioned between the lower pipe body locking block and the upper pipe body locking block, a precision ring is arranged in the lower pipe body locking block, and the inner diameter of the precision ring is close to the outer diameter of the inner pipe so as to prevent the inner pipe from shaking; one side that joint portion and location metal strip correspond is equipped with the bellying, and the spring makes bellying and inner tube outer wall butt for compression state. The positioning metal strip is arranged on the inner pipe, so that the risk of damage of the jack is avoided, and meanwhile, a precision ring is arranged in the pipe body locking block to prevent the inner pipe from shaking; the telescopic rod can be locked by rotating the knob in the using process, so that misoperation is avoided; in addition, the descending buffer device is arranged at the bottom of the inner tube to slow down the descending speed of the inner tube, so that the surveying and mapping instrument and the tube are prevented from being damaged by fast sliding, the whole structure is simple, the weight is light, and the operation by a user is convenient.

Description

Carbon fiber telescopic centering rod

Technical Field

The utility model relates to a surveying and mapping instrument technical field, more specifically say, relate to a carbon fibre centering rod that stretches out and draws back.

Background

The carbon fiber telescopic centering rod is mainly used for supporting a measuring instrument, and the conventional carbon fiber telescopic centering rod generally comprises an inner pipe and an outer pipe, wherein the inner pipe is sleeved in the outer pipe to move, so that the inner pipe is lifted or lowered to be locked after the inner pipe is in a proper position. In actual use, the telescopic length of the telescopic rod is usually fixed at a plurality of common size positions, for convenient use, a through hole is formed at a specific position of the inner pipe, usually a common scale position, a bolt is arranged at the same time, the bolt is inserted into the through hole, the inner pipe is limited, and thus the inner pipe can be directly fixed to a specific height. The telescopic centering rod for the carbon fiber at present has the following problems in the use process: the inner pipe is not tightly fixed and can shake, which affects the positioning; the bolt can impact the through hole, the through hole is broken after a long time, and the positioning is inaccurate; some carbon fiber telescopic centering rods are complicated to operate; in addition, the measuring instrument on the surveying and mapping rod is heavy, and the speed is high when the inner pipe descends, so that great impact force is caused to the pipe, and the telescopic rod is in risk of being damaged by collision deformation; the stabilizer blade and the stabilizer blade fixing base of bottom have the condition that the pine takes off, and the sharp end of stabilizer blade has been used for a long time wearing and tearing serious, influences the survey and drawing precision, and the stabilizer blade fixing base is pasted at the inside pipe wall through gluing usually, and the stabilizer blade also is pasted on the stabilizer blade fixing base through the viscose, if the stabilizer blade wearing and tearing are difficult to be replaced. The defects bring inconvenience to users, and the defects are not completely overcome by the carbon fiber telescopic centering rod at present based on the requirements of the surveying and mapping market on the quality, the portability and the reliability of the carbon fiber telescopic centering rod.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the utility model provides a carbon fibre flexible centering rod, every position to original structure all has brand-new improvement, solves the problem that present telescopic link exists, avoids above-mentioned defect.

The technical solution of the utility model is that: the utility model provides a carbon fiber telescopic centering rod, which comprises a hollow outer pipe, an inner pipe sleeved in the outer pipe and a pipe body locking block fixed at the top of the outer pipe, wherein the pipe wall of the inner pipe is provided with scales and a positioning metal strip;

the pipe body locking block comprises a lower pipe body locking block, an upper pipe body locking block and a clamping part, wherein the lower pipe body locking block and the upper pipe body locking block are connected into a whole through bolts;

the middle parts of the lower pipe locking block and the upper pipe locking block are respectively provided with a first through hole and a second through hole for the inner pipe to pass through; a precision ring is arranged in the first through hole, and the inner diameter of the precision ring is close to the outer diameter of the inner pipe, so that the inner pipe is prevented from shaking; a bulge is arranged on one side of the clamping part corresponding to the positioning metal strip, and the bulge is abutted to the outer wall of the inner tube due to the compression state of the spring; when the inner tube slides to the protruding part is aligned with the positioning hole of the positioning metal strip, the protruding part is inserted into the positioning metal strip, the inner tube is clamped by the tube body locking block, after the knob is pressed down, the clamping part extrudes the spring on the opposite side to generate displacement, the protruding part is separated from the positioning metal strip, and the inner tube can slide freely.

Furthermore, one side wall of the inner pipe is inwards recessed to form an arc-shaped groove, the positioning metal strip is accommodated in the arc-shaped groove, the top and the bottom of the positioning metal strip are fixed on the inner pipe through bolts, and the arc-shaped groove and the positioning metal strip are both on the same side as the protruding part; a plurality of transverse limiting holes are uniformly formed in the positioning metal strip, and when the inner tube slides to the protruding portion and is overlapped with the transverse limiting holes, the protruding portion is inserted into the transverse limiting holes by the elastic force of the spring to clamp the inner tube.

Furthermore, a first groove body is formed in one end, close to the knob, of the lower pipe body locking block, and the bottom of the first groove body is an arc surface; the clamping part is provided with a second groove body, and a transverse baffle is arranged in the second groove body; the knob is provided with a rotating rod; a third groove body is arranged at the corresponding end of the upper pipe body locking block;

when the knob is horizontal, the rotating rod is positioned in the second groove body, and one end of the rotating rod is horizontally arranged on the transverse baffle; when the knob rotates, the rotating rod rotates to be vertical from the horizontal state, the lower part of the rotating rod is abutted to the bottom of the first groove body, the upper part of the rotating rod is located in the third groove body, when the rotating rod continues to rotate, the diameter of the arc surface at the arc-shaped bottom of the first groove body is increased, the lower end of the rotating rod is blocked, and the knob cannot continue to rotate or press down.

Furthermore, a mounting hole is formed in the middle of the knob in the radial direction, and the rotating rod penetrates through the mounting hole and is connected with the knob into a whole.

Further, an inner tube descending buffer device is arranged at the bottom of the inner tube and comprises a connecting piece with a hollow inner part, an air ventilation piece and a plugging cap, wherein the air ventilation piece and the plugging cap are arranged in the connecting piece;

the connecting piece is arranged at the bottom of the inner pipe, the middle part of the ventilation piece is an airflow channel, and the plugging cap is arranged in the airflow channel; the lower part of the ventilating piece is also provided with a skirt edge which is downwards inclined and has a gap with the inner wall of the outer pipe;

when the inner pipe descends, the skirt edge upwards supports and butts against the inner wall of the outer pipe, air at the lower part of the inner pipe can only flow outwards through the airflow channel, the air is extruded to increase the pressure at the lower part of the inner pipe, and the blocking speed of the inner pipe is reduced when the inner pipe descends; when the inner pipe descends at a high speed, the blocking cap moves upwards under the action of lower pressure to block the airflow channel, only a small amount of air flows out of the side wall of the outer pipe, and the descending speed of the inner pipe is controlled.

Furthermore, the top of the inner pipe is a threaded connection part for installing a measuring instrument, a gasket is arranged on the bottom plane of the threaded connection part, and the gasket is sleeved below threads of the threaded connection part.

Further, outer tube bottom still is equipped with stabilizer blade and stabilizer blade fixing base, the stabilizer blade fixing base install in outer tube bottom, the stabilizer blade with the detachable connection of stabilizer blade fixing base.

Furthermore, one end of the support leg is a sharp part, the other end of the support leg is a fixed connecting part, and the middle of the support leg is provided with an external thread; the upper portion of stabilizer blade fixing base is equipped with the round recess, and the lateral part of lower part is equipped with the through-hole, also be equipped with the fixed orifices on the lateral wall of outer tube lower part, bolt or pin pass the fixed orifices supports make in the recess the installation of stabilizer blade fixing base is fixed in the lower part of outer tube, bolt or pin pass the through-hole supports fixed connection portion makes the stabilizer blade installation is fixed in the stabilizer blade fixing base.

Furthermore, a cap is arranged outside the support leg, and an internal thread is arranged on the side wall of the cap and matched with the external thread on the support leg and the threaded connection part; and a pull rope mounting hole is also formed in the top of the cap.

Furthermore, the upper pipe body locking block is provided with a centering blister and a blister mounting groove, the bottom of the blister mounting groove is provided with a boss bolt hole, and the bottom of the centering blister is fixed in the blister mounting groove by penetrating a hexagon special screw through the boss bolt hole; the screw bolt of the special hexagonal-head screw comprises a threaded part and a smooth surface part, the diameter of the smooth surface part is smaller than the bottom diameter of the threaded part, the threaded part is clamped on a boss at the top of a boss bolt hole, and the smooth surface part is located at the lower part of the boss bolt hole.

Implement the utility model discloses a carbon fibre centering rod that stretches out and draws back has following beneficial effect: the positioning metal strip is arranged on the inner pipe to replace the original mode of fixing the inner pipe by the bolt, the positioning metal strip is made of high-strength metal materials, the risk of damaging the jack is avoided, and meanwhile, a precision ring is arranged in the pipe body locking block to prevent the inner pipe from shaking; the telescopic rod can be locked by rotating the knob in the using process, so that misoperation is avoided; in addition, a descending buffer device is arranged at the bottom of the inner pipe, so that the descending speed of the inner pipe is reduced, the quick gliding and collision damage to a surveying and mapping instrument and the pipe are avoided, and the effects of quick, efficient, stable and reliable positioning of the pipe body and stable gliding of the inner pipe are achieved; the support legs are detachably connected with the support leg fixing seats, and the support legs can be replaced after being worn; the whole structure is simple, the weight is light, and the operation by a user is convenient.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic structural view of the carbon fiber telescopic centering rod of the present invention;

FIG. 2 is a schematic structural view of an inner tube;

FIG. 3 is a schematic structural view of a locking block of the tube body;

fig. 4 is a schematic view of a disassembled structure of the tube locking block 1;

FIG. 5 is a schematic view of a disassembled structure of the tube locking block 2;

FIG. 6 is a schematic view of the bottom view of the tube locking block;

fig. 7 is a schematic structural view of the carbon fiber telescopic centering rod of the present invention with the outer tube removed;

FIG. 8 is a schematic structural view of an inner tube descent damping device;

FIG. 9 is a sectional view of the inner tube descent buffering device;

fig. 10 is a top view of the tube locking block;

FIG. 11 is a cross-sectional view AA in FIG. 10;

FIG. 12 is an assembly view of the foot, foot mount and cap;

FIG. 13 is a schematic view of FIG. 12 with the cap removed;

fig. 14 is a cross-sectional view of fig. 13.

Detailed Description

Fig. 1 to 14 show a preferred embodiment of the carbon fiber telescopic centering rod of the present invention, which comprises a hollow outer tube 1, an inner tube 2 sleeved in the outer tube 1, and a tube locking block 3 fixed on the top of the outer tube 1, wherein the inner tube 2 is provided with scales and a positioning metal strip 4 on the wall thereof, and the outer tube 1 is made of a carbon fiber round tube with light weight and high strength; the pipe body locking block 3 comprises a lower pipe body locking block 5, an upper pipe body locking block 6 and a clamping part 7 which is positioned between the lower pipe body locking block 5 and the upper pipe body locking block 6, wherein the lower pipe body locking block and the upper pipe body locking block are connected into a whole through bolts, one side of the clamping part 7 is provided with a knob 8, and the other side of the clamping part 7 is provided with a spring 16, as shown in a back view of the pipe body locking block in fig. 6; the middle parts of the lower pipe locking block 5 and the upper pipe locking block 6 are respectively provided with a first through hole 51 and a second through hole 61 for the inner pipe 2 to pass through; a precision ring 52 is arranged in the first through hole 51, and the inner diameter of the precision ring 52 is close to the outer diameter of the inner pipe 2, so that the inner pipe 2 is prevented from shaking; a bulge 71 is arranged on one side of the clamping part 7 corresponding to the positioning metal strip 4, and the bulge 71 is abutted to the outer wall of the inner tube 2 when the spring 16 is in a compressed state; when the inner tube 2 slides to the position that the protruding part 71 is aligned with the positioning hole of the positioning metal strip 4, the protruding part 71 is inserted into the positioning metal strip 4, the inner tube 2 is clamped by the tube body locking block 3, after the knob 8 is pressed down, the clamping part 7 extrudes the spring 16 on the opposite side to generate displacement, the protruding part 71 is separated from the positioning metal strip 4, and the inner tube 2 can freely slide. The inner tube of the flexible centering rod of carbon fibre that uses usually has fixed unstable phenomenon, and the inner tube rocks during use, influences the accuracy of survey and drawing, the utility model discloses a solve above-mentioned problem, improved to body latch segment 3. Body latch segment 3 includes body latch segment 5 down, goes up body latch segment 6 and middle joint portion 7, and the inboard of joint portion 7 is equipped with spring 16, and spring 16 is in the extrusion state, has outside elasticity to joint portion 7. The clamping portion 7 is provided with a protruding portion 71 on the same side as the spring 16, the inner tube 2 penetrates through the first through hole 51 and the second through hole 61, the protruding portion 71 is always abutted to the outer wall of the inner tube 2 under the elastic force of the spring 16, when the inner tube 2 slides to the position of the positioning hole of the protruding portion 71 and the positioning metal strip 4, the protruding portion 71 can be clamped on the positioning metal strip 4, and the inner tube 2 can not slide any more. When the knob 8 is pressed down, the clamping part 7 moves inwards to extrude the spring 16, the bulge part 71 on the clamping part 7 also moves inwards, and then the clamping part is separated from the positioning metal strip 4, and the inner tube 2 can freely slide up and down. In order to avoid shaking of the inner tube 2, a precision ring 52 is further arranged in the first through hole 51 in the embodiment, the inner diameter of the precision ring 52 is close to the outer diameter of the inner tube 2, the inner tube 2 is sleeved in the precision ring 52, the gap between the inner tube and the precision ring is small, the inner tube 2 slides to a specified position from top to bottom, and then the knob is screwed to enable the inner tube to be fixed and clamped relatively, so that the precision of repeated positioning can be accurately obtained, and the accuracy of measurement is improved.

In this embodiment, one side wall of the inner tube 2 is recessed inward to form an arc-shaped groove 21, the positioning metal strip 4 is accommodated in the arc-shaped groove 21, the top and the bottom of the positioning metal strip are fixed on the inner tube 2 through bolts, the positioning metal strip 4 is made of a high-strength metal strip, and the arc-shaped groove 21 and the positioning metal strip 4 are both on the same side as the protruding portion 71; a plurality of transverse limiting holes 41 are uniformly formed in the positioning metal strip 4, and when the inner tube 2 slides to the protruding portion 71 to coincide with the transverse limiting holes 41, the protruding portion 71 is inserted into the transverse limiting holes 41 by the elasticity of the spring 16 to clamp the inner tube 2. The inner tube 2 is fixed to a common scale position fast by a common telescopic rod for improving working efficiency, holes are formed in the inner tube, and then the bolt is inserted into the holes, so that the inner tube is fixed on a specific scale, the bolt can impact the holes in the use process of the structure, the holes are easy to damage, in the embodiment, an additional positioning metal strip 4 is arranged on the inner tube 2, a transverse limiting hole 41 is formed in the positioning metal strip 4, as shown in fig. 2, when the position of the lug boss 71 is overlapped with the position of the transverse limiting hole 41, the lug boss 71 can be clamped into the transverse limiting hole 41, the inner tube 2 is limited, a common bolt fixing mode is avoided, and the impact on the transverse limiting hole 41 is reduced. In practical use, the carbon fiber telescopic centering rod has a common adjusting distance, such as 10mm, 20mm, 30mm and the like, in the embodiment, only a plurality of common scales are marked on the inner tube 2, such as 1.8 m, 2 m and the like, and the distance between the transverse limiting holes 41 is set to be 5mm or 10mm, so that a user can calculate the scale of each transverse limiting hole 41 according to the marked common scales. If the transverse limiting hole 41 is damaged, a new positioning metal strip 4 can be replaced, and the inner tube structure can be used continuously for a longer time than the fixing mode of drilling the hole on the inner tube 2, which is another advantage of the inner tube structure of the embodiment.

In this embodiment, a first groove 53 is formed in one end, close to the knob 8, of the lower tube locking block 5, the bottom of the first groove 53 is an arc surface, and the diameter of the arc surface is increased from right to left, that is, the bottom of the first groove 53 is gradually increased from right to left; the clamping part 7 is provided with a second groove body 72, and a transverse baffle 73 is arranged in the second groove body 72; a rotating rod 81 is arranged on the knob 8, a mounting hole is formed in the middle of the knob 8 in the radial direction, the rotating rod 81 penetrates through the mounting hole to be connected with the knob 8 into a whole, the rotating rod 81 and the knob 8 are arranged at an angle of 90 degrees, and the rotating rod 81 is driven to rotate by rotating the knob 8; a third groove body 62 is arranged at the corresponding end of the upper pipe body locking block 6; when the knob 8 is horizontal, the rotating rod 81 is located in the second groove 72, one end of the rotating rod is horizontally placed on the transverse baffle 73, and the other end of the rotating rod is suspended. When the knob 8 is driven to rotate clockwise, the diameter of the arc-shaped bottom of the first groove body 53 is increased, the rotating rod 81 is extruded by the arc-shaped bottom, the rotating rod 81 continues to rotate until the lower end of the rotating rod 81 is blocked, the knob 8 cannot continue to rotate or be pressed down, the knob 8 can be locked to prevent misoperation and mistaken pressing, when the knob 8 needs to be pressed down, the knob 8 is rotated anticlockwise, the lower end of the rotating rod 81 is rotated out from the arc-shaped bottom of the first groove body 53 until the rotating rod 81 rotates to the horizontal position, the lower end of the rotating rod 81 is abutted to the transverse baffle 73, and the rotating rod 81 cannot continue to rotate anticlockwise, returning to the initial position, the knob 8 can be pressed to unlock the inner tube 2.

In this embodiment, the bottom of the inner tube 2 is provided with an inner tube descending buffer device 9, and the inner tube descending buffer device 9 comprises a connecting piece 91 with a hollow inner part, an air vent piece 92 arranged in the connecting piece 91 and a blocking cap 93; the connecting piece 91 is arranged at the bottom of the inner pipe 2 and is made of wear-resistant soft rubber, the middle part of the ventilating piece 92 is an airflow channel 94, and the blocking cap 93 is arranged in the airflow channel 94; the lower part of the ventilating piece 92 is also provided with a skirt 95, the skirt 95 inclines downwards, and a gap is formed between the skirt 95 and the inner wall of the outer tube 1; when the inner tube 2 descends, the skirt edge 95 is upwards supported by the influence of bottom airflow to abut against the inner wall of the outer tube 1, a gap between the skirt edge 95 and the inner wall of the outer tube 1 is reduced, and air at the bottom of the inner tube 2 is sealed, so that the extrusion pressure of air at the lower part of the inner tube 2 is increased, and the blocking speed of the inner tube 2 is reduced when the inner tube 2 descends; in order to prevent the inner tube 2 from completely falling, the air-permeable member 92 is provided to allow air at the lower portion of the inner tube 2 to flow upward through the air flow passage 94, so as to prevent the air pressure at the lower portion from being too high; when the measuring instrument installed at the top of the inner tube 2 is heavy and the descending speed is very fast, the blocking cap 93 moves upwards under the action of the pressure of the lower part to block the air flow channel 94, only a small amount of air flows out from the side wall of the outer tube 1, the descending speed of the inner tube 2 is controlled and descends at a slow speed, and the risk that the measuring instrument falls down quickly and is broken by smashing is avoided.

In this embodiment, the top of the inner tube 2 is a threaded connection portion 22 for installing a measuring instrument, a gasket 23 is arranged on a bottom plane of the threaded connection portion 22, and the gasket 23 is sleeved below threads of the threaded connection portion 22. The measuring instrument is in threaded connection with the inner pipe 2 and is in contact with the plane at the bottom of the threaded connection part 22, a gasket 23 is arranged on the contact surface, and the gasket 23 enables the instrument not to be loosened easily after being installed. Usually this gasket is O type circle, and the bottom is beaten to glue and is pasted in threaded connection portion 22's bottom, has used for a long time the gasket and can drop, and gasket 23 in this embodiment directly overlaps and establish in the screw thread lower part, need not beat to glue and paste, and gasket 23 is difficult for dropping and loses in the use transportation.

In this embodiment, the bottom of the outer tube 1 is further provided with a support leg 10 and a support leg fixing seat 14, the support leg fixing seat 14 is installed at the bottom of the outer tube 1, and the support leg 10 is detachably connected with the support leg fixing seat 14. The stabilizer blade 10 is used for with ground butt, supports the flexible centering rod of carbon fibre, and the one end of stabilizer blade fixing base 14 is installed in outer tube 1 bottom, other end installation fixed stabilizer blade 10. Usually the stabilizer blade fixing base is through beating sticky subsides at 1 inner wall of outer tube, and the stabilizer blade also is pasted on the stabilizer blade fixing base through the viscose, and stabilizer blade 10 in use wearing and tearing speed is very fast, if the stabilizer blade wearing and tearing can influence the survey and drawing precision seriously, hardly replaces, sets up both to detachable connection with both in this embodiment, conveniently changes stabilizer blade 10.

In the embodiment, one end of the support leg 10 is a sharp part, the other end is a fixed connecting part, and the middle part is provided with an external thread; the upper portion of the leg fixing base 14 is provided with a circle of grooves 141, the side portion of the lower portion is provided with through holes 142, the side wall of the lower portion of the outer tube 1 is also provided with fixing holes, and bolts or pins penetrate through the fixing holes to abut against the grooves 141 to enable the leg fixing base 14 to be installed and fixed on the lower portion of the outer tube 1, so that the leg fixing base 14 and the outer tube 1 can be installed more conveniently. The headless screw passes through the through hole 142 and abuts against the fixed connection portion to enable the supporting leg 10 to be installed and fixed in the supporting leg fixing seat 14, as shown in fig. 13, a concave portion is formed in the fixed connection portion, the headless screw abuts against the concave portion to enable the supporting leg 10 to be incapable of moving, and the supporting leg 10 can be replaced by taking out the headless screw.

In this embodiment, a cap 15 is further provided outside the support leg 10, and an internal thread is provided on the side wall of the cap 15 and is matched with the external thread on the support leg 10 and the threaded connection portion 22; the middle of the top of the cap 15 is also provided with a stay cord mounting hole. The cap 15 is used for wrapping the support leg 10 when the centering rod is not used, so that the sharp part of the support leg 10 is prevented from hurting people, but the cap 15 is easy to lose after being removed in the actual use process, so that in the embodiment, the support leg 10 is provided with a thread with the same diameter (usually 5/8-11 threads made by English) as the external thread on the threaded connection part 22, and the inner side of the cap 15 is provided with an internal thread, so that the cap 15 is in threaded connection with the support leg 10 when the centering rod is not used, and the cap 15 can be locked on the threaded connection part 22 on the upper part at the same time. Meanwhile, a stay cord mounting hole is formed in the middle of the top of the cap 15, the centering bubble can be calibrated before the telescopic centering rod is used, the centering rod is usually hung by a rope for calibration, convenience is brought to calibration work of engineering constructors after the stay cord mounting hole is formed, and the rope is directly threaded on the stay cord mounting hole.

In the embodiment, the middle pipe body locking block 6 is provided with a centering bubble 11 and a bubble mounting groove 12, the bottom of the bubble mounting groove 12 is provided with a boss bolt hole 121, and the bottom of the centering bubble 11 is fixed in the bubble mounting groove 12 by using a special hexagon socket head screw 13 penetrating through the boss bolt hole 121; the stud of the hexagon socket head special screw 13 comprises a threaded part 131 and a smooth surface part 132, the diameter of the smooth surface part 132 is smaller than the bottom diameter of the threaded part 131, the threaded part 131 is clamped on a boss at the top of the boss bolt hole 121, and the smooth surface part 132 is positioned at the lower part of the boss bolt hole 121. Centering bubble 11 is installed on upper tube body latch segment 6 through the screw of lower part for calibration during the use detects whether carbon fibre is flexible centering rod is perpendicular with bubble (level). In actual use because centering blister 11 receives the vibration easily, the screw of lower part has been used for a long time and can become flexible, uses the socket head cap screw of original general structure directly to drop from the bolt hole of bottom easily, needs the user to be equipped with the bolt of same model again and installs centering blister 11. In order to solve the problem, the utility model discloses establish the bolt hole into the bolt hole 121 that has the boss, the screw of bottom is changed into hexagon socket head special type screw 13, this screw has threaded portion 131 and plain noodles part 132, and the diameter of threaded portion 131 is greater than the diameter of plain noodles part 132, threaded portion 131 screws into boss bolt hole 121 internal fixation centering blister 11 during the installation, threaded portion 131 is in boss department, even follow-up screw is not hard up, also can not drop from the mounting hole, but hang on the boss, the user discover the back in time screw up can.

By using the carbon fiber telescopic centering rod, the positioning metal strip is arranged on the inner pipe to replace the original mode of fixing the inner pipe by the bolt, the positioning metal strip is made of high-strength metal materials, the risk of damaging the jack is avoided, and meanwhile, the precision ring is arranged in the pipe locking block to prevent the inner pipe from shaking; the telescopic rod can be locked by rotating the knob in the using process, so that misoperation is avoided; in addition, a descending buffer device is arranged at the bottom of the inner pipe, so that the descending speed of the inner pipe is reduced, the quick gliding and collision damage to a surveying and mapping instrument and the pipe are avoided, and the effects of quick, efficient, stable and reliable positioning of the pipe body and stable gliding of the inner pipe are achieved; the support legs are detachably connected with the support leg fixing seats, and the support legs can be replaced after being worn; the whole structure is simple, the weight is light, and the operation by a user is convenient.

The above description is only a preferred embodiment of the present invention, and many changes can be made in the detailed description and the application scope according to the idea of the present invention for those skilled in the art, which all belong to the protection scope of the present invention as long as the changes do not depart from the concept of the present invention.

Claims

1. A carbon fiber telescopic centering rod comprises a hollow outer pipe (1), an inner pipe (2) sleeved in the outer pipe (1) and a pipe body locking block (3) fixed at the top of the outer pipe (1), and is characterized in that the pipe wall of the inner pipe (2) is provided with scales and a positioning metal strip (4);

the pipe body locking block (3) comprises a lower pipe body locking block (5) and an upper pipe body locking block (6) which are connected into a whole through bolts and a clamping part (7) positioned between the lower pipe body locking block (5) and the upper pipe body locking block (6), wherein one side of the clamping part (7) is provided with a knob (8), and the other side of the clamping part is provided with a spring (16);

a first through hole (51) and a second through hole (61) for the inner tube (2) to pass through are respectively formed in the middle parts of the lower tube body locking block (5) and the upper tube body locking block (6); a precision ring (52) is arranged in the first through hole (51), and the inner diameter of the precision ring (52) is close to the outer diameter of the inner pipe (2) to prevent the inner pipe (2) from shaking; a bulge (71) is arranged on one side of the clamping portion (7) corresponding to the positioning metal strip (4), and the bulge (71) is abutted to the outer wall of the inner tube (2) due to the compression state of the spring (16); when the inner tube (2) slides to the boss (71) is aligned with the positioning hole of the positioning metal strip (4), the boss (71) is inserted into the positioning metal strip (4), the inner tube (2) is clamped by the tube body locking block (3), after the knob (8) is pressed down, the clamping portion (7) extrudes the spring (16) on the opposite side to generate displacement, the boss (71) is separated from the positioning metal strip (4), and the inner tube (2) can slide freely.

2. The carbon fiber telescopic centering rod as claimed in claim 1, wherein one side wall of the inner pipe (2) is recessed inwards to form an arc-shaped groove (21), the positioning metal strip (4) is accommodated in the arc-shaped groove (21), the top and the bottom are fixed on the inner pipe (2) through bolts, and the arc-shaped groove (21) and the positioning metal strip (4) are on the same side as the protrusion (71); a plurality of transverse limiting holes (41) are uniformly formed in the positioning metal strip (4), and when the inner tube (2) slides to the protruding portion (71) and is overlapped with the transverse limiting holes (41), the protruding portion (71) is inserted into the transverse limiting holes (41) by the elasticity of the spring (16) to clamp the inner tube (2).

3. The carbon fiber telescopic centering rod as claimed in claim 2, wherein a first groove (53) is formed at one end of the lower pipe body locking block (5) close to the knob (8), and the bottom of the first groove (53) is an arc surface; a second groove body (72) is arranged on the clamping part (7), and a transverse baffle (73) is arranged in the second groove body (72); a rotating rod (81) is arranged on the knob (8); a third groove body (62) is arranged at the corresponding end of the upper pipe body locking block (6);

when the knob (8) is horizontal, the rotating rod (81) is positioned in the second groove body (72), and one end of the rotating rod is flatly placed on the transverse baffle (73); when knob (8) rotate, it is vertical state to rotate stick (81) by the horizontality rotation, the lower part with the bottom of first cell body (53) offsets, and upper portion is located in third cell body (62), when continuing to rotate, the cambered surface diameter increase of first cell body (53) arc bottom, it is died to rotate stick (81) lower extreme card, knob (8) can't continue to rotate or press.

4. The carbon fiber telescopic centering rod as claimed in claim 3, wherein a mounting hole is opened in a radial direction of a middle portion of the knob (8), and the rotating rod (81) is integrally connected with the knob (8) through the mounting hole.

5. The carbon fiber telescopic centering rod as claimed in claim 1 or 4, wherein the inner pipe (2) is provided at the bottom with an inner pipe descending buffer device (9), the inner pipe descending buffer device (9) comprises a connecting member (91) with a hollow inside, an air vent member (92) installed in the connecting member (91) and a blocking cap (93);

the connecting piece (91) is arranged at the bottom of the inner pipe (2), the middle part of the ventilating piece (92) is an air flow channel (94), and the blocking cap (93) is arranged in the air flow channel (94); a skirt edge (95) is further arranged at the lower part of the ventilation piece (92), the skirt edge (95) inclines downwards, and a gap is formed between the skirt edge (95) and the inner wall of the outer pipe (1);

when the inner pipe (2) descends, the skirt edge (95) is upwards propped against the inner wall of the outer pipe (1), air at the lower part of the inner pipe (2) can only flow outwards through the airflow channel (94), the air is extruded to increase the pressure at the lower part of the inner pipe (2), and the blocking speed of the inner pipe (2) is reduced when the inner pipe descends; when the inner pipe (2) descends at a high speed, the blocking cap (93) moves upwards under the action of lower pressure to block the air flow channel (94), only a small amount of air flows out of the side wall of the outer pipe (1), and the descending speed of the inner pipe (2) is controlled.

6. The carbon fiber telescopic centering rod as claimed in claim 5, wherein the top of the inner pipe (2) is a threaded connection portion (22) for installing a measuring instrument, a gasket (23) is provided on the bottom plane of the threaded connection portion (22), and the gasket (23) is sleeved under the threads of the threaded connection portion (22).

7. The carbon fiber telescopic centering rod as claimed in claim 6, wherein a support leg (10) and a support leg fixing seat (14) are further provided at the bottom of the outer tube (1), the support leg fixing seat (14) is installed at the bottom of the outer tube (1), and the support leg (10) is detachably connected with the support leg fixing seat (14).

8. The carbon fiber telescopic centering rod as claimed in claim 7, wherein said support leg (10) has a sharp portion at one end and a fixed connection portion at the other end, and is provided with an external thread in the middle; the upper portion of stabilizer blade fixing base (14) is equipped with round recess (141), and the lateral part of lower part is equipped with through-hole (142), also be equipped with the fixed orifices on the lateral wall of outer tube (1) lower part, bolt or pin pass the fixed orifices supports make in recess (141) stabilizer blade fixing base (14) installation is fixed in the lower part of outer tube (1), bolt or pin pass through-hole (142) support fixed connection portion makes stabilizer blade (10) installation is fixed in stabilizer blade fixing base (14).

9. The carbon fiber telescopic centering rod as claimed in claim 8, wherein a cap (15) is further provided outside the supporting leg (10), and an internal thread is provided on the side wall of the cap (15) to match with the external thread on the supporting leg (10) and the threaded connection part (22); and a pull rope mounting hole is also formed in the top of the cover cap (15).

10. The carbon fiber telescopic centering rod as claimed in claim 9, wherein the upper pipe body locking block (6) is provided with a centering bubble (11) and a bubble mounting groove (12), a boss bolt hole (121) is formed in the bottom of the bubble mounting groove (12), and the bottom of the centering bubble (11) is fixed in the bubble mounting groove (12) by using a special hexagonal head screw (13) penetrating through the boss bolt hole (121); the screw bolt of the special hexagonal-head screw (13) comprises a threaded part (131) and a smooth surface part (132), the diameter of the smooth surface part (132) is smaller than the bottom diameter of the threaded part (131), the threaded part (131) is clamped on a boss at the top of the boss bolt hole (121), and the smooth surface part (132) is located at the lower part of the boss bolt hole (121).