CN219265317U

CN219265317U - Stable centering rod

Info

Publication number: CN219265317U
Application number: CN202223320347.3U
Authority: CN
Inventors: 王翔; 张良
Original assignee: Changzhou Kelida Instrument Co ltd
Current assignee: Changzhou Kelida Instrument Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-06-27
Anticipated expiration: 2032-12-09

Abstract

The utility model provides a stable centering rod, which comprises an outer pipe, an inner pipe, a pressing plate arranged on the outer pipe and a spring, wherein the elastic connection is realized through the spring; the pressing plate applies pressure to the inner tube under the elastic action of the spring, and the pressure direction of the pressing plate is perpendicular to the inner tube. By the structure, the pressure generated by the pressing plate is exerted on the inner tube, so that the inner tube is stressed more, the generated static friction force is also larger, the locked position is more stable, and sliding is not easy to generate.

Description

Stable centering rod

Technical Field

The utility model relates to the technical field of engineering measuring instruments, in particular to a stable centering rod.

Background

The centering rod generally comprises a fixed pipe and a telescopic rod, and the telescopic rod is inserted into the fixed pipe and can be telescopic.

After the telescopic rod stretches out, the telescopic rod is fixed through a locking assembly, as shown in fig. 3, the locking assembly comprises two pressing blocks connected through a pressure spring, and the end parts of the pressing blocks are provided with first inclined planes which are obliquely arranged. The device also comprises a clamping block arranged on the outer tube, and is sleeved outside the inner tube. The clamping block is provided with a second inclined plane corresponding to the first inclined plane. The pressing block presses the second inclined plane under the action of the pressure spring, drives the clamping block to abut against the inner tube, and applies pressure to the inner tube to fix the inner tube. The clamping block can be separated from the inner pipe by pressing the clamping block.

In the device, the inner tube is fixed by the pressure exerted by the clamping block and static friction force. This pressure is derived from the pressure of the first ramp against the second ramp. Because the pressure of the first inclined plane to the second inclined plane and the pressure of the clamping block to the inner tube form an included angle, the pressure of the clamping block to the inner tube is only a component force of the pressure of the first inclined plane to the second inclined plane, so that the pressure of the clamping block to the inner tube is smaller, the position of the inner tube after telescopic locking is unstable, sliding is easy to generate, and measurement is influenced.

Disclosure of Invention

The utility model aims to solve the technical problems that: the technical problem that the position of an inner tube in a traditional centering rod is unstable after locking is solved.

The utility model provides a stable centering rod, which comprises an outer pipe, an inner pipe, a pressing plate arranged on the outer pipe and a spring, wherein the elastic connection is realized through the spring;

the pressing plate applies pressure to the inner tube under the elastic action of the spring, and the pressure direction of the pressing plate is perpendicular to the inner tube.

By the structure, the pressure generated by the pressing plate is exerted on the inner tube, so that the inner tube is stressed more, the generated static friction force is also larger, the locked position is more stable, and sliding is not easy to generate.

The specific structure of the pressing plate is as follows: the pressing plate is hinged with the outer tube, one end of the hinged part of the pressing plate is connected with the outer tube through a spring, and the other end of the pressing plate abuts against the inner tube.

The difference in position of the hinged part of the pressing plate also affects the pressure of the pressing plate on the inner pipe, and based on the difference, the further design is that: the hinged part of the pressing plate is close to the other end of the pressing plate. Therefore, the distance between the other end of the pressing plate and the hinge joint is shortened, and the pressure of the pressing plate to the inner pipe is improved.

Because the pressing plate is contacted with the inner tube only by one edge, the connecting area is small, and abrasion and scratch are easy to generate, the problem is further improved and solved, and in particular, the pressing block is inserted into the outer tube, and the other end of the pressing plate is abutted against the pressing block. The setting of briquetting has increased the area of being under force of inner tube, and not only be difficult for wearing and tearing, fish tail have still improved static friction, make the inner tube lock back position more firm.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a front view of the present utility model, partially in section;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is a front cross-sectional view of a conventional centering rod locking structure;

in the figure: 1. an outer tube; 2. an inner tube; 3. a pressing plate; 4. a spring; 5. briquetting; 6. a first connection plate; 7. a second connecting plate; 8. and (5) a notch.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

Embodiment one:

as shown in fig. 1, the utility model is a stable centering rod, which comprises an outer tube 1 and an inner tube 2, wherein the inner tube 2 is inserted into the outer tube 1 and can stretch out and draw back.

The outer tube 1 is provided with a hinged pressing plate 3, and the concrete structure is as follows: as shown in fig. 2, the outer wall of the outer tube 1 is connected with a first connecting plate 6, the pressing plate 3 is hinged with the first connecting plate 6, and the hinged part is arranged between two ends of the pressing plate 3. The first connecting plate 6 is also vertically connected with a second connecting plate 7, and the hinge joint of the pressing plate 3 is positioned at the inner side of the second connecting plate 7. The second connecting plate 7 plays a role in protecting the hinge joint of the pressing plate 3. The pressing plate 3 is positioned on the inner side of the second connecting plate 7 and is also provided with a notch 8, and the second connecting plate 7 is arranged in the notch 8; the notch 8 is not only used for reducing the weight of the pressing plate 3, but also can reduce the height of the first connecting plate 6, thereby saving the cost.

One end of the pressing plate 3 is connected with the outer tube 1 through a spring 4, and the other end passes through a perforation on the outer tube 1 and abuts against the inner tube 2. The spring 4 is a compression spring, the restoring force drives the other end of the pressing plate 3 to apply pressure to the inner tube 2, and the pressure direction of the spring is perpendicular to the inner tube 2.

With the structure, the pressure generated by the pressing plate 3 is exerted on the inner tube 2, so that the inner tube 2 is stressed more, the generated static friction force is larger, the locked position is more stable, and sliding is not easy to generate.

Embodiment two:

the difference from the first embodiment is that: the hinge of the pressing plate 3 is close to the other end of the pressing plate 3. In this way, the distance from the other end of the pressure plate 3 to the hinge is shortened, thereby increasing the pressure of the pressure plate 3 against the inner tube 2.

Embodiment III:

the difference from the first embodiment is that: the outer tube 1 is vertically inserted with a pressing block 5, and the other end of the pressing plate 3 abuts against the pressing block 5. The setting of briquetting 5 has increased the area of being under force of inner tube 2, and not only be difficult for wearing and tearing, fish tail have still improved static friction, make the position more firm after inner tube 2 locking.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims

1. The utility model provides a stable centering rod, includes outer tube (1) and inner tube (2), its characterized in that: the device also comprises a pressing plate (3) arranged on the outer tube (1), and elastic connection is realized through a spring (4);

the pressing plate (3) applies pressure to the inner tube (2) under the elastic action of the spring (4), and the pressure direction of the pressing plate is perpendicular to the inner tube (2).

2. The stable centering rod of claim 1, wherein: the pressing plate (3) is hinged with the outer tube (1), one end of the hinged part of the pressing plate is connected with the outer tube (1) through the spring (4), and the other end of the pressing plate abuts against the inner tube (2).

3. The stable centering rod of claim 2, wherein: the hinge joint of the pressing plate (3) is close to the other end of the pressing plate (3).

4. The stable centering rod of claim 2, wherein: the outer tube (1) is inserted with a pressing block (5), and the other end of the pressing plate (3) abuts against the pressing block (5).