CN220772211U - Pull formula centering rod body - Google Patents

Abstract

The utility model relates to the technical field of surveying and mapping instruments, and particularly provides a drawing type centering rod body, which comprises a plurality of rod bodies, wherein a threaded connecting column is fixed at the top end of the upper rod body, supporting legs are fixed at the bottom end of the lower rod body, two adjacent rod bodies are connected through a locking structure, and the locking structure comprises: the fixed sleeve is fixed at the bottom end of the rod body above the fixed sleeve, the connecting sleeve is sleeved on the rod body below the fixed sleeve, and the lining is positioned in the connecting sleeve and can rotate along the inner wall of the connecting sleeve. The utility model has long service life and good stability, can more flexibly adjust the measurement height according to actual needs, and is beneficial to providing high guarantee and stability guarantee for accurate measurement of the surveying and mapping device.

Description

Pull formula centering rod body

Technical Field

The utility model relates to the technical field of surveying and mapping instruments, in particular to a drawing type centering rod body.

Background

Centering bars are indispensable centering devices for surveying and mapping, and generally, the surveying and mapping devices are mounted at their top ends and their bottom ends are mounted with feet for landing. There are various specifications of varying heights according to the measurement requirements. In order to be convenient for transport and carry, prior art has still designed telescopic centering rod, its core part is the scalable body of rod, including two sections or more diameter variation in size body, embolia in the body of major diameter and fixed connection controllably through the body of minor diameter, common fixed connection structure is holding locking structure, its partly connection structure is fixed in the body bottom of major diameter, the body upper end of minor diameter is located to another part connection structure cover, after the degree of inserting of the body of minor diameter in the body of major diameter is adjusted, hold the connection structure who overlaps on the body of minor diameter and locate the connection structure threaded connection who is fixed in the body of major diameter. The existing holding type locking structure is limited by the specific structure, and after long-term use, the fixed connection of the pipe bodies at the two ends can be realized, but the connection stability is poor, the pipe body with the small diameter can shake, and the accuracy of mapping is seriously affected. For this purpose, the present application is presented.

Disclosure of Invention

In order to solve the defects in the prior art, the utility model provides a pull type centering rod body.

The technical scheme of the utility model is realized as follows:

the pull type centering rod body comprises a plurality of rod bodies, wherein a threaded connecting column is fixed at the top end of the upper rod body, supporting legs are fixed at the bottom end of the lower rod body, and two adjacent rod bodies are connected through a locking structure;

the locking structure includes: the fixing sleeve comprises a hollow fixing sleeve body with a cylindrical structure, and external threads are arranged on the periphery of the fixing sleeve body; the connecting sleeve comprises a hollow connecting sleeve body with a cylindrical structure, wherein an inner thread is arranged on the inner wall of the connecting sleeve body, one end face part of the connecting sleeve body extends inwards to form a clamping ring I, the clamping ring I is a conical surface, and an inner convex ring is arranged on the inner wall of the connecting sleeve body adjacent to one end of the clamping ring I; the lining comprises a hollow inner lining with a flat-top conical structure, through grooves are formed in the inner lining, a plurality of telescopic grooves I and telescopic grooves II are respectively formed in the small end of the inner lining and the large end of the inner lining, an outer convex ring II and a clamping ring II are arranged on the outer periphery of the inner lining in a surrounding mode, the outer convex ring II and the clamping ring II are arranged at intervals, and the clamping ring II is a conical surface;

the lining is arranged in the connecting sleeve, the outer convex ring II and the clamping ring II are clamped at two sides of the inner convex ring, the fixing sleeve is fixed at the bottom end of the rod body above the connecting sleeve, and the connecting sleeve is sleeved on the rod body below the connecting sleeve.

Preferably, the fixed sleeve body is also provided with an outer convex ring I, and the outer convex ring I and the outer thread are arranged at intervals; the inner wall of one end of the connecting sleeve, which is far away from the clamping ring I, is provided with a smooth area without internal threads corresponding to the outer convex ring I.

Further preferably, a rotary sign is provided at a position adjacent to the fixed sleeve with respect to the upper rod body.

Further preferably, the connecting sleeve body is provided with an anti-slip structure along the periphery thereof.

More preferably, the method comprises the steps of: the rod body I, the rod body II and the rod body III are provided with scale marks.

Most preferably, the number of the telescopic slots I is 3, and the number of the telescopic slots II is 2.

Compared with the prior art, the measuring device has long service life and good stability, can flexibly adjust the measuring height according to actual needs, and is beneficial to providing high guarantee and stability guarantee for accurate measurement of a surveying and mapping device.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is an exploded perspective view of the locking mechanism of the present utility model;

FIG. 2 is a front view of the retaining sleeve of FIG. 1;

fig. 3 is a front view of the connection sleeve of fig. 1;

fig. 4 is a right side view of the connection sleeve of fig. 1;

FIG. 5 is another schematic view of the connecting sleeve of FIG. 1;

FIG. 6 is a schematic diagram of the structure of the present utility model;

fig. 7 is an enlarged view of a partial structure in fig. 6.

In the figure: A. a rod body I; a1, a threaded connecting column; B. a rod body II; C. a rod body III; c1, supporting legs; D. rotating the mark; E. scale marks; 1. a fixed sleeve; 11. a fixed sleeve body; 12. an outer convex ring I; 13. an external thread; 2. connecting sleeves; 21. a connecting sleeve body; 211. an anti-slip structure; 22. a clamping ring I; 23. an inner convex ring; 3. a lining; 31. a through groove; 32. a telescopic groove I; 33. a telescopic groove II; 34. an outer convex ring II; 35. and a clamping ring II.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown collectively in fig. 6 and 7: a pull-out centering rod body comprising: the rod body IA, the rod body IIB and the rod body IIIC are provided with scale marks E, the top end of the rod body IA is fixedly provided with a threaded connecting column A1, the threaded connecting column A1 is used for installing a mapping device, the bottom end of the rod body IIIC is fixedly provided with a support leg C1 used for grounding, the support leg C1 is preferably in threaded connection with the rod body IIIC, and the rod body IA and the rod body IIB and the rod body IIC are respectively connected through a locking structure;

as shown in fig. 1-4: the locking structure comprises: the fixing sleeve 1, the connecting sleeve 2 and the lining 3, wherein the fixing sleeve 1 comprises a hollow fixing sleeve body 11 with a cylindrical structure, and external threads 13 are arranged on the periphery of the fixing sleeve body 11; the connecting sleeve 2 comprises a hollow connecting sleeve body 21 with a cylindrical structure, wherein an inner thread is arranged on the inner wall of the connecting sleeve body 21, one end face part of the connecting sleeve body 21 extends inwards to form a clamping ring I22, the clamping ring I22 is a conical surface, and an inner convex ring 23 is arranged on the inner wall of the connecting sleeve body 21 adjacent to one end of the clamping ring I22; the lining 3 comprises a hollow inner lining with a flat-top conical structure, the inner lining is provided with a through groove 31, a small end of the inner lining and a large end of the inner lining are respectively provided with a plurality of telescopic grooves I32 and telescopic grooves II 33, an outer convex ring II 34 and a clamping ring II 35 are arranged on the periphery of the inner lining in a surrounding manner, the outer convex ring II 34 and the clamping ring II 35 are arranged at intervals, the clamping ring II 35 is in a conical surface shape so as to be convenient to be attached to the inner surface of the clamping ring I22 when being locked, and the lining 3 of the structure can ensure that each part of the lining is tightly held against a rod body at the opposite lower part, so that shaking is avoided after the lining is connected with the rod body at the upper part, and the accuracy of mapping is influenced;

the bottom of body of rod IIA and body of rod IIB's bottom are fixed a fixed cover 1 respectively, set up a adapter sleeve 2 respectively on body of rod IIB and the body of rod IIIC, and inside lining 3 is located adapter sleeve 2 and bulge loop II 34 and snap ring II 35 joint in the both sides of bulge loop 23, so make inside lining 3 rotatable in adapter sleeve 2.

In the utility model, the inner diameters of the rod body IA, the rod body IIB and the rod body IIIC are gradually reduced, the rod body IIB is inserted into the rod body IA, the insertion degree is adjustable, the rod body III is inserted into the rod body IIB, the insertion degree is adjustable, the good insertion degree is determined according to the required measurement height, and then the connecting sleeve 2 is screwed so that the connecting sleeve 2 is gradually connected with the fixed sleeve 1, and the stable connection of two adjacent rod bodies is realized.

Furthermore, in the above embodiment, the rod body iiic is provided with scale marks, and the scale values indicated by the scale marks become gradually larger from bottom to top. In order to facilitate measurement, in practice, the rod body IIB is preferably pulled out from the rod body IA to the maximum and locked, the height of the pull-type centering rod body is adjusted by adjusting the inserting degree of the rod body IIIC in the rod body IIB, and the final displayed height is the total length of the rod body IIB, the rod body IA and the rod body IIIC positioned at the outer part of the rod body IIB; the graduation marks are preferably 1.40m, 1.5m, 1.6m, 1.7m and 1.8m according to actual measurement requirements.

In addition, in order to avoid falling of the rod body IIB when being pulled out of the rod body IA, a limit structure for preventing the rod body IIB from completely leaving the rod body IA is preferably arranged on the periphery of the top end of the rod body IIB, for example, a limit ring fixed on the periphery of the top end of the rod body IIB is arranged, the outer diameter of the limit ring is larger than the inner diameter of the rod body IA, and when the rod body IIB is pulled out to the maximum, the rod body IIB cannot be pulled out continuously under the action of the limit ring; further, in order to avoid the locking structure to lock the time body of rod IIB rotates in body of rod IA, influences locking operation, preferably set up on body of rod IA's inner wall and prevent another limit structure of stop collar pivoted, for example set up on its inner wall along body of rod IA length direction setting spacing, set up on the stop collar with spacing groove that spacing structure matches, at the pull in-process, body of rod IIB is taken out in body of rod IA under the effect of stop collar, both can't finally break away from body of rod IA, can't rotate again at the in-process of pull. Of course, other limiting structures that can achieve the above requirements are also possible, and are not the scope of the present utility model herein, and those skilled in the art can flexibly set the limiting structures according to the prior art.

For avoiding the rod body IIIC from falling off from the rod body IIB and generating rotation during locking operation, a similar limiting structure can be arranged by referring to the technical scheme.

The fixing sleeve body 11 is also provided with an outer convex ring I12, and the outer convex ring I12 and the outer thread 13 are arranged at intervals; the inner wall of one end of the connecting sleeve 2 far away from the clamping ring I22 is provided with a smooth internal thread-free area corresponding to the outer convex ring I12. After the connecting sleeve 2 is thoroughly connected with the fixed sleeve 1, the inner wall of the smooth area without internal threads of the connecting sleeve 2 is basically tightly attached to the outer surface of the outer convex ring I12, so that the phenomenon that when the working environment is poor, dust and soil enter the threaded connection part to cause the connection of two adjacent rod bodies to skid is effectively avoided.

Yet another example is: the rotary marks D are arranged at the positions, close to the fixed sleeve 1, of the rod body above the fixed sleeve, and particularly, the rotary marks D are arranged at the bottoms of the rod body IA and the rod body IIB, and generally comprise locking marks, unlocking marks and arrows, so that the rotary direction of the connecting sleeve 2 can be accurately indicated, and an operator can be conveniently guided to carry out locking or unlocking operations.

As shown in fig. 5: in order to improve the locking efficiency, in all the embodiments described above, the anti-slip structure 211 is preferably arranged on the connecting sleeve body 21 along its periphery, and the anti-slip structure 211 may be an anti-slip pattern integrated with the connecting sleeve body 21, or may be a rubber anti-slip sleeve sleeved outside the connecting sleeve body 21, and no matter what structure, an application point may be provided for an operator to rotate the connecting sleeve body 21, so that the locking operation is simpler and easier.

In addition, in the above technical solution, it should be noted that:

1. the fixing sleeve 1 and the connecting sleeve 2 are preferably made of carbon fiber, and the lining 3 is preferably made of polytetrafluoroethylene.

2. The drawing type centering rod body composed of the rod body IA, the rod body IIB and the rod body IIIC shown in fig. 6 is only a preferred embodiment, and the number of the rod bodies can be flexibly adjusted according to actual needs in practice, such as two, four and the like.

3. The number of the telescopic slots I32 is 3, the number of the telescopic slots II 33 is 2, namely, the small end of the inner bushing is larger in number and is convenient to have larger telescopic capacity, and when the connecting sleeve 2 is locked to the lower telescopic joint through the inner bushing, the inner bushing finally presents a hollow cylindrical structure; in specific practice, the number and the distribution structure can be flexibly adjusted according to actual needs.

In the present utility model, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances. In addition, other descriptors employed in the present utility model: the big end and the small end are used for describing the structural relationship, and are not used for limiting the protection scope of the utility model.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (6)

1. The utility model provides a pull formula centering rod body which characterized in that: the device comprises a plurality of rod bodies, wherein a threaded connecting column (A1) is fixed at the top end of each rod body above, a supporting leg (C1) is fixed at the bottom end of each rod body below, and two adjacent rod bodies are connected through a locking structure;

the locking structure includes: the fixing sleeve (1), the connecting sleeve (2) and the lining (3), wherein the fixing sleeve (1) comprises a hollow fixing sleeve body (11) with a cylindrical structure, and external threads (13) are arranged on the periphery of the fixing sleeve body (11); the connecting sleeve (2) comprises a hollow connecting sleeve body (21) with a cylindrical structure, an inner thread is arranged on the inner wall of the connecting sleeve body (21), a clamping ring I (22) is formed by inward extension of one end face part of the connecting sleeve body (21), the clamping ring I (22) is in a conical surface, and an inner convex ring (23) is arranged on the inner wall, close to one end of the clamping ring I (22), of the connecting sleeve body (21); the lining (3) comprises a hollow inner lining with a flat-top conical structure, a through groove (31) is formed in the inner lining, a plurality of telescopic grooves I (32) and telescopic grooves II (33) are respectively formed in the small end of the inner lining and the large end of the inner lining, an outer convex ring II (34) and a clamping ring II (35) are arranged on the outer periphery of the inner lining, the outer convex ring II (34) and the clamping ring II (35) are arranged at intervals, and the clamping ring II (35) is a conical surface;

the lining (3) is positioned in the connecting sleeve (2), the outer convex ring II (34) and the clamping ring II (35) are clamped at two sides of the inner convex ring (23), the fixing sleeve (1) is fixed at the bottom end of the rod body above the connecting sleeve relatively, and the connecting sleeve (2) is sleeved on the rod body below the connecting sleeve relatively.

2. The pull-out centering rod body of claim 1, wherein: the fixed sleeve body (11) is also provided with an outer convex ring I (12), and the outer convex ring I (12) and the outer thread (13) are arranged at intervals; the inner wall of one end of the connecting sleeve (2) far away from the clamping ring I (22) is provided with a smooth area without the internal thread, which corresponds to the outer convex ring I (12).

3. The pull-out centering rod body of claim 2, wherein: the rotary mark (D) is arranged at the position, which is close to the fixed sleeve (1), of the rod body relatively above the fixed sleeve.

4. A pull-out centering rod body as claimed in claim 3, wherein: an anti-slip structure (211) is arranged on the connecting sleeve body (21) along the periphery of the connecting sleeve body.

5. The pull-out centering rod body of claim 4, wherein: comprising the following steps: the rod body I (A), the rod body II (B) and the rod body III (C), wherein scale marks (E) are arranged on the rod body III (C).

6. The pull-out centering rod body of any one of claims 1-5, wherein: the number of the telescopic slots I (32) is 3, and the number of the telescopic slots II (33) is 2.