CN216898921U

CN216898921U - Anti-disengaging structure of centering rod

Info

Publication number: CN216898921U
Application number: CN202220243870.1U
Authority: CN
Inventors: 单家义
Original assignee: Shenzhen Liangdao Technology Co ltd
Current assignee: Shenzhen Liangdao Technology Co ltd
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2022-07-05
Anticipated expiration: 2032-01-28

Abstract

The utility model relates to the field of surveying and mapping tools, in particular to an anti-disengaging structure of a centering rod, wherein the centering rod comprises an inner tube and an outer tube, the inner tube is sleeved with the outer tube, one end of the outer tube is provided with a connecting column, a toe and an elastic plug, the toe is provided with an external thread connecting rod, the connecting column is provided with an internal thread connecting hole matched with the external thread connecting rod, the elastic plug is arranged in the internal thread connecting hole, the external thread connecting rod is screwed into the internal thread connecting hole and abutted against the elastic plug, and the elastic plug is used for preventing the external thread connecting rod of the toe from disengaging from the internal thread connecting hole on the connecting column. Thereby realizing the drop prevention of the toes.

Description

Anti-disengaging structure of centering rod

Technical Field

The utility model relates to the field of surveying and mapping tools, in particular to an anti-disengaging structure of a centering rod.

Background

Market user feedback using centering rod mapping, the toes wear faster because the centering rod is used more frequently on the field cement. Most of centering rods on the market connect toes and connecting columns through threads and reinforce the centering rods through glue to prevent the toes from loosening, but the toes are difficult to replace after being worn, the cost is too high when the whole centering rods are replaced, and meanwhile, the centering rods are not environment-friendly.

SUMMERY OF THE UTILITY MODEL

The utility model provides an anti-falling structure of a centering rod, aiming at solving the defects and shortcomings of the prior art.

In order to achieve the purpose, the utility model adopts the technical scheme that the anti-disengaging structure of the centering rod comprises an inner tube and an outer tube, the inner tube is sleeved with the outer tube, one end of the outer tube is provided with a connecting column, a toe and an elastic plug, an external threaded connecting rod is arranged on the toe, an internal threaded connecting hole matched with the external threaded connecting rod is arranged on the connecting column, the elastic plug is arranged in the internal threaded connecting hole, the external threaded connecting rod is screwed into the internal threaded connecting hole and is abutted against the elastic plug, and the elastic plug is used for preventing the external threaded connecting rod of the toe from disengaging from the internal threaded connecting hole on the connecting column.

The outer pipe is further provided with a fixing pin for fixing the connecting column, and the fixing pin is inserted into the outer pipe and the side wall of the connecting column.

The other end of outer tube is provided with the fixing base that is used for fixed inner tube height, the inner tube inboard is provided with the bullet round pin, be provided with on the lateral wall of inner tube with the through-hole that the bullet round pin corresponds the setting, the fixing base inboard is provided with the spacing groove, stimulates the inner tube, the through-hole with when the spacing groove is relative, the bullet round pin pops out the through-hole with spacing groove looks joint is in order to prevent the inner tube is pulled out the outer tube.

The elastic pin comprises a U-shaped elastic sheet and pin parts arranged at two ends of the U-shaped elastic sheet, and the pin parts are arranged at the through holes.

The limiting groove comprises an inclined part inclined along the downward sliding direction of the inner pipe, and the inner pipe slides downward along the inclined part to enable the pin part on the elastic pin to retract to the inner side of the inner pipe.

And the external thread connecting rod of the toe is sleeved with an elastic rubber ring.

And a plurality of anti-skid tangent planes used for dismounting and clamping are arranged on the outer side wall of the tiptoe.

The centering rod further comprises a protective sleeve matched with the tiptoe, and the protective sleeve is used for being sleeved on the tiptoe.

The utility model has the beneficial effects that:

the utility model provides an anti-falling structure of a centering rod, wherein a toe is in threaded connection with a connecting column, an elastic plug is arranged in an internal threaded connecting hole of the connecting column, when the toe is screwed, an external threaded connecting rod of the toe can extrude the elastic plug, when the external threaded connecting rod is completely screwed into the internal threaded connecting hole, the reaction force of the elastic plug can enable threads on the external threaded connecting rod to be abutted to threads of the internal threaded connecting hole, so that the resistance for rotating the toe is increased, the anti-falling of the toe is realized, and when the toe is replaced, the toe can be rotated only by clamping the toe with a tool wrench, and the toe is detached from the connecting column.

Drawings

FIG. 1 is a schematic view of a toe anti-separation structure of an anti-separation structure of a centering rod according to the present invention;

FIG. 2 is a sectional view of the toe and connection post of the anti-separation structure of the centering rod according to the present invention;

FIG. 3 is a schematic view of the toe of the anti-separation structure of the centering rod according to the present invention;

fig. 4 is a sectional view of an inner tube coming-off preventing structure of the centering rod according to the present invention;

fig. 5 is an enlarged view of a portion a of fig. 4.

Detailed Description

The utility model will be described in further detail with reference to the accompanying drawings, which are simplified schematic drawings and only schematically illustrate the basic structure of the utility model, and the direction of the embodiment is based on the direction of fig. 1.

As shown in fig. 1 to 3, an anti-disengaging structure of centering rod, the centering rod includes inner tube 1 and outer tube 2, inner tube 1 cup joints with outer tube 2, the one end of outer tube 2 is provided with spliced pole 3, tiptoe 4 and elasticity plug 5, be provided with external screw thread connecting rod 41 on the tiptoe 4, be provided with on the spliced pole 3 with external screw thread connecting rod 41 matched with female connection hole 31, elasticity plug 5 sets up in female connection hole 31, external screw thread connecting rod 41 screw in female connection hole 31 and with elasticity plug 5 butt, elasticity plug 5 is used for preventing that the external screw thread connecting rod 41 of tiptoe 4 from deviating from female connection hole 31 on the spliced pole 3.

When the tiptoe 4 of screwing, the external thread connecting rod 41 of tiptoe 4 can extrude elasticity kicking plug 5, when external thread connecting rod 41 screws in female connection hole 31 completely, the reaction force of elasticity kicking plug 5 can make the screw thread on the external thread connecting rod 41 and the screw thread butt of female connection hole 31, the resistance of rotating tiptoe 4 has been increased, thereby realize the anticreep of tiptoe 4, when changing tiptoe 4, only need just can rotate tiptoe 4 with the help of tool wrench centre gripping tiptoe 4, dismantle tiptoe 4 from spliced pole 3. The elastic top plug 5 is in a spherical shape.

The outer tube 2 is also provided with a fixing pin 6 for fixing the connecting column 3, and the fixing pin 6 is inserted into the side walls of the outer tube 2 and the connecting column 3. Generally be connected through glue between spliced pole 3 and the outer tube 2, but after long-term, the viscidity of glue descends, and the not hard up condition can appear in spliced pole 3, and fixed pin 6 can further strengthen being connected between outer tube 2 and spliced pole 3.

As shown in fig. 4 and 5, a fixing seat 7 for fixing the height of the inner tube 1 is disposed at the other end of the outer tube 2, an elastic pin 8 is disposed inside the inner tube 1, a through hole 11 corresponding to the elastic pin 8 is disposed on the side wall of the inner tube 1, a limiting groove 71 is disposed inside the fixing seat 7, when the inner tube 1 is pulled, and the through hole 11 is opposite to the limiting groove 71, the elastic pin 8 is popped out, and the through hole 11 and the limiting groove 71 are clamped to prevent the inner tube 1 from being pulled out of the outer tube 2. Sometimes, the inner tube 1 needs to be pulled out by a large length due to the measurement requirement, and sometimes the inner tube 1 is easy to be pulled out, so that the inner tube 1 needs to be reinserted into the outer tube 2, which easily wastes working time and reduces the customer experience. Bullet round pin 8 generally sets up the below in inner tube 1, and when pulling out the inner tube 1 of more length, through-hole 11 can be relative with spacing groove 71, and bullet round pin 8 pops out through-hole 11 and spacing groove 71 looks joint, just so can prevent that inner tube 1 from deviating from outer tube 2, has promoted user experience, has improved work efficiency.

The elastic pin 8 comprises a U-shaped elastic sheet 81 and pin parts 82 arranged at two ends of the U-shaped elastic sheet 81, and the pin parts 82 are arranged at the through holes 11. The through-holes 11 are also arranged one on each side of the inner tube 1. When the through hole 11 is not opposite to the limiting groove 71, the inner walls of the two sides of the outer tube 2 are abutted against the pin part 82, and the two ends of the U-shaped elastic sheet 81 are squeezed to reduce the distance between the two ends of the U-shaped elastic sheet 81; when the inner tube 1 is pulled to enable the through hole 11 to be opposite to the limiting groove 71, the distance between the two ends of the U-shaped elastic sheet 81 is increased, and the pin part 82 is popped out of the through hole 11 to be clamped with the limiting groove 71. In addition, an elastic structure such as a spring may be used instead of the U-shaped elastic piece 81.

The stopper groove 71 includes an inclined portion 72 inclined in a downward sliding direction of the inner pipe 1, and the inner pipe 1 slides down along the inclined portion 72 to retract the pin portion 82 of the latch 8 toward the inside of the inner pipe 1.

The external thread connecting rod 41 of the toe 4 is sleeved with an elastic rubber ring 43. Elasticity rubber ring 43 is the same with elasticity top plug 5's effect, when the tiptoe 4 of screwing, elasticity rubber ring 43 can be extruded to tiptoe 4's external screw thread connecting rod 41, when external screw thread connecting rod 41 screws in female connection hole 31 completely, elasticity rubber ring 43's reaction force can make the screw thread on the external screw thread connecting rod 41 and female connection hole 31's screw thread butt, the resistance of rotating tiptoe 4 has been increased, thereby realize tiptoe 4's anticreep, when changing tiptoe 4, only need just can rotate tiptoe 4 with the help of tool spanner centre gripping tiptoe 4, detach tiptoe 4 from spliced pole 3. The elastic rubber ring 43 is annular.

The lateral wall of the tiptoe 4 is provided with a plurality of antiskid tangent planes 42 for dismounting and clamping. If the tiptoe 4 is set to be a smooth cambered surface, the phenomenon of clamping and slipping can easily occur during disassembly and assembly, and the tangent plane 42 can prevent the phenomenon of clamping and slipping. The outer side of the tiptoe 4 can be provided with straight line bites, so that the clamping is convenient to assemble and disassemble.

The centering rod further comprises a protective sleeve 9 matched with the tiptoe 4, and the protective sleeve 9 is used for being sleeved on the tiptoe 4. The protective sheath 9 can prevent the tiptoe 4 from wearing and tearing in the handling process, and can prevent the user from being stabbed by the tiptoe 4.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides an anti-disengaging structure of centering rod, the centering rod includes inner tube (1) and outer tube (2), inner tube (1) cup joints its characterized in that with outer tube (2): the one end of outer tube (2) is provided with spliced pole (3), tiptoe (4) and elasticity top plug (5), be provided with external screw thread connecting rod (41) on tiptoe (4), be provided with on spliced pole (3) with external screw thread connecting rod (41) matched with female connection hole (31), elasticity top plug (5) set up in female connection hole (31), external screw thread connecting rod (41) screw in female connection hole (31) and with elasticity top plug (5) butt, elasticity top plug (5) are used for preventing external screw thread connecting rod (41) of tiptoe (4) are deviate from female connection hole (31) on spliced pole (3).

2. The centering rod retaining structure of claim 1, wherein: the outer pipe (2) is further provided with a fixing pin (6) used for fixing the connecting column (3), and the fixing pin (6) is inserted into the outer pipe (2) and the side wall of the connecting column (3).

3. The centering rod retaining structure of claim 2, wherein: the other end of outer tube (2) is provided with fixing base (7) that are used for fixed inner tube (1) height, inner tube (1) inboard is provided with bullet round pin (8), be provided with on the lateral wall of inner tube (1) with bullet round pin (8) correspond through-hole (11) that set up, fixing base (7) inboard is provided with spacing groove (71), the pulling inner tube (1), through-hole (11) with spacing groove (71) are relative, bullet round pin (8) are popped out through-hole (11) with spacing groove (71) looks joint is in order to prevent inner tube (1) is pulled out outer tube (2).

4. An anti-slip structure of a centering rod according to claim 3, wherein: the elastic pin (8) comprises a U-shaped elastic sheet (81) and pin parts (82) arranged at two ends of the U-shaped elastic sheet (81), and the pin parts (82) are arranged at the through holes (11).

5. An anti-slip structure of a centering rod according to claim 4, wherein: the limiting groove (71) comprises an inclined part (72) inclined along the downward sliding direction of the inner pipe (1), and the inner pipe (1) slides downward along the inclined part (72) to enable a pin part (82) on the elastic pin (8) to retract to the inner side of the inner pipe (1).

6. An anti-slip structure of a centering rod according to claim 5, wherein: the external thread connecting rod (41) of the toe (4) is sleeved with an elastic rubber ring (43).

7. An anti-slip structure of a centering rod according to claim 6, wherein: the outer side wall of the tiptoe (4) is provided with a plurality of anti-skid tangent planes (42) used for dismounting and clamping.

8. An anti-slip structure of a centering rod as set forth in claim 7, wherein: the centering rod further comprises a protective sleeve (9) matched with the tiptoe (4), and the protective sleeve (9) is used for being sleeved on the tiptoe (4).