CN219694353U

CN219694353U - Telescopic listening needle

Info

Publication number: CN219694353U
Application number: CN202320987096.XU
Authority: CN
Inventors: 王正君
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2023-09-15
Anticipated expiration: 2033-04-27

Abstract

The utility model provides a telescopic listening pin, which comprises a telescopic rod and a listening ball; the telescopic rod can stretch and retract to adjust the length of the rod, one end of the telescopic rod is a detection end, the other end of the telescopic rod is a listening end provided with the listening ball, the inside of the telescopic rod is of a hollow structure, and the listening ball is provided with an opening structure; and the listening ball is provided with a sound transmission hole communicated with the hollow structure. The telescopic voice needle is based on the arrangement of the telescopic rod, so that the length of the voice needle can be adjusted, and the telescopic voice needle is convenient to transport, carry and store; and, based on the inside cavity of telescopic link and be provided with the listening ball of biography sound hole, from this for sound conduction is better when detecting, improves the detection effect.

Description

Telescopic listening needle

Technical Field

The utility model relates to the field of detection equipment, in particular to a telescopic listening pin.

Background

A listening pin (listening stick) is a detection device that uses a conduction principle to accurately judge a problem portion. The tool is applied to ideal inspection tools in industries such as petroleum, chemical engineering, petrochemical industry, power generation, metallurgy, mine, coal mine, machinery and the like. For example, the method is used for judging the generator rotor boring, abnormal sound of a machine bearing and water and air leakage of a valve.

The listening pin usually adopts a metal straight bar structure, one end of the listening pin is placed at the equipment, the other end of the listening pin is placed at the ear to listen to sound, and equipment faults are judged through the sound. For example, the new use patent of CN202041380U discloses a handheld listening stick for qualitatively judging the running condition of a bearing, which adopts a probe with a fixed length as a sound transmission carrier, and the length is not adjustable, so that the handheld listening stick occupies a larger space in the process of carrying and storing, is inconvenient to store and transport, has poor sound transmission effect due to the adopted structure, and affects the accuracy of equipment fault judgment. The above problems are to be solved.

Disclosure of Invention

In order to solve the problems existing in the background technology, the utility model provides a telescopic hearing needle, which comprises a telescopic rod and a hearing ball; the telescopic rod can stretch and retract to adjust the length of the rod, one end of the telescopic rod is a detection end, the other end of the telescopic rod is a listening end provided with the listening ball, the inside of the telescopic rod is of a hollow structure, and the listening ball is provided with an opening structure; and the listening ball is provided with a sound transmission hole communicated with the hollow structure.

In the telescopic listening pin, the sound transmission hole extends along the length direction of the telescopic rod, and the sound transmission hole is a stepped hole.

In the telescopic listening pin, the diameter of the sound transmission hole is 3mm.

In the telescopic listening pin of the present utility model, the telescopic rod includes a plurality of telescopic joints; the telescopic joints are sleeved with each other, and positioning pieces are abutted between the telescopic joints; the relative position between the telescopic joints is maintained by the positioning piece.

In the telescopic listening pin, the positioning piece is a damping piece or an elastic piece, is arranged between the two telescopic joints which are mutually sleeved and is abutted with the telescopic joints.

In the telescopic listening pin, the positioning piece is an arc-shaped elastic piece, and the positioning piece is arranged between the telescopic joints and is abutted with the two telescopic joints in a sleeved mode.

In the telescopic listening pin, the positioning piece is provided with the positioning protrusion towards the telescopic joint, the telescopic joint is correspondingly provided with the positioning hole, and the positioning hole accommodates the positioning protrusion.

In the telescopic hearing needle, the telescopic hearing needle further comprises a sound collecting cylinder; the sound collecting cylinder is arranged on one side of the telescopic rod, which is close to the sound ball, and is of a funnel-shaped flaring structure towards the sound ball.

In the telescopic listening pin, the sound collecting cylinder is made of silica gel.

In the telescopic listening pin of the utility model, the listening ball is made of plastic material.

The beneficial effects of the utility model are as follows: the telescopic voice needle is based on the arrangement of the telescopic rod, so that the length of the voice needle can be adjusted, and the telescopic voice needle is convenient to transport, carry and store; and, based on the inside cavity of telescopic link and be provided with the listening ball of biography sound hole, from this for sound conduction is better when detecting, improves the detection effect.

Drawings

Fig. 1 is a schematic view of the structure of a telescopic listening pin of the present utility model;

fig. 2 is a partial schematic view of the utility model at the location of the telescoping pin;

fig. 3 is a cross-sectional view A-A of fig. 1 of the telescoping listening pin of the present utility model.

Legend: 1. a telescopic rod; 11. an expansion joint; 12. a limit structure; 13. positioning holes; 2. a listening ball; 21. a sound transmission hole; 3. a positioning piece; 31. positioning the bulge; 32. a guiding tail; 4. a sound collecting cylinder.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The term "plurality" in the description of the utility model and the claims or in the above figures refers to more than two (including two).

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The telescopic listening pin of the present utility model is described in detail below with reference to the accompanying drawings.

As shown in fig. 1-3, a telescopic hearing needle comprises a telescopic rod 1 (optionally of copper or stainless steel material) and a hearing ball 2; the telescopic rod 1 can stretch and retract to adjust the length of the rod, one end of the telescopic rod 1 is a detection end, the detection end is arranged on equipment to be detected, the other end of the telescopic rod is a listening end provided with a listening ball 2, the listening end is arranged at an ear, the listening ball 2 is arranged at the ear when the telescopic listening needle is used, the inside of the telescopic rod 1 is of a hollow structure, and the listening ball 2 is arranged as an opening structure; the sound ball 2 is provided with a sound transmission hole 21 communicated with the hollow structure, specifically, when in use, the outlet of the sound transmission hole 21 is arranged at the ear, and the sound ball 2 is detachably connected with the telescopic rod 1, for example, in a plug-in connection; preferably, the listening ball 2 is made of plastic material, such as high-strength plastic, which is not used for traditional metal balls, and the listening ball made of plastic material is not frozen when being used in a low-temperature environment, so that the use experience is improved.

The telescopic voice needle is based on the arrangement of the telescopic rod, so that the length of the voice needle can be adjusted, and the telescopic voice needle is convenient to transport, carry and store; and based on the inside cavity of telescopic link and be provided with the listening ball of biography sound hole, from this for sound conduction is better when detecting, can let the accurate mechanical failure that judges of technical staff, improves the detection effect.

In some embodiments, the sound transmission hole 21 extends along the length direction of the telescopic rod 1, and the sound transmission hole 21 is a stepped hole, specifically, the inner hole diameter near the hollow structure is larger than the hole diameter at the outlet side.

In some embodiments, the sound transfer holes 21 are 3mm in diameter.

In some examples, the telescopic rod 1 comprises a plurality of telescopic joints 11 (such as thin-wall pipe joints; the number of the pipe joints is 4 or 5, for example, the whole length is shorter after the telescopic rod is contracted based on the number of the pipe joints); the telescopic joints 11 are sleeved and connected, and a positioning piece 3 is abutted between the telescopic joints 11; the relative position between the telescopic joints 11 is maintained by the positioning members 3. Optionally, the positioning piece 3 is a damping piece or an elastic piece, and is arranged between two telescopic joints 11 which are mutually sleeved and is abutted with the telescopic joints 11; based on the setting of the positioning piece 3, the relative position between the telescopic joints 11 can be kept, in other words, the length of the telescopic rod 1 can be adjusted and fixed between the longest length and the shortest length, so that the telescopic rod can adapt to various application environments when in use, and the applicability of the listening needle is improved; specifically, the end of the expansion joint 11 serving as the detection end is a closed cone head, and the expansion joint 11 close to the listening end is provided with the listening ball 2.

Specifically, in the above embodiment, the positioning element 3 is an arc-shaped elastic sheet (such as a metal sheet, optionally made of copper or stainless steel), and the positioning element 3 is mounted on the expansion joint 11 and is abutted with the two expansion joints 11 sleeved with each other by an arc-shaped surface; when in installation, the middle part of the arc-shaped elastic sheet is abutted with one expansion joint 11, and the two sides of the arc-shaped elastic sheet are abutted with the other expansion joint 11 (for example, the radian of the arc-shaped elastic sheet is larger or smaller than that of the expansion joint 11); based on the friction force between the positioning piece 3 and the telescopic joint 11, the relative position between the two telescopic joints is kept, preferably, the end part of the telescopic joint 11 is provided with a limiting structure 12 such as a limiting groove or a protrusion (such as an annular groove or a protrusion, which are arranged on two sides of the positioning piece 3) so as to prevent the positioning piece 3 from being separated from the telescopic joint 11 in the telescopic process; the metal elastic sheet is adopted to be used as a locating piece, compared with other elastic structures such as elastic rubber, the elastic rubber can be oxidized due to long-time use, so that elasticity is changed, and further the telescopic stability of the telescopic rod is affected, the metal material is adopted, so that the service life of the telescopic rod is longer, further, the annular bulge is arranged on one side of the telescopic joint 11 where the locating hole is formed, the annular groove is arranged on the other side of the telescopic joint, after the telescopic joint 11 is sleeved, the bulge and the groove are respectively attached to the inner wall of the telescopic joint 11, so that the telescopic coaxiality is improved in the telescopic process, the limiting effect is also achieved, and the telescopic joint 11 is prevented from being separated when the telescopic joint stretches out and draws back.

Preferably, the positioning member 3 has a positioning recess, and the corresponding telescopic joint 11 is provided with a positioning hole, and the positioning hole accommodates a positioning protrusion (the specific positioning protrusion is formed by an arc-shaped elastic sheet concave), so that the positioning member 3 is prevented from moving during expansion and contraction, and the abutting effect is ensured. Further preferably, the positioning member 3 is provided with the guiding fin 32 on one side of the length direction of the expansion joint 11, and the guiding fin 32 is closer to the expansion joint (if attached to the expansion joint) than the main body part of the positioning member 3 in the radial direction of the expansion joint 11, so that the two expansion joints 11 are conveniently sleeved when being assembled, and a gap is reserved between the main body part of the positioning member 3 and the expansion joint 11, so that the positioning member 3 has a larger deformation space, the abutting effect between the expansion joint 11 and the positioning member 3 is better, and the more stable positioning effect is obtained.

In the above embodiment, the positioning members 3 are arranged in pairs and on opposite sides of the expansion joint 11 with a space between the positioning members 3. Based on the positioning members 3 arranged in pairs, the coaxiality between the telescopic joints 11 is better.

In some embodiments, the telescopic listening pin further comprises a sound gathering barrel 4; the sound collecting cylinder 4 is arranged on one side of the telescopic rod 1, which is close to the sound ball 2, and is of a funnel-shaped flaring structure towards the sound ball 2; the interference of external noise is effectively isolated based on the arrangement of the sound collecting barrel 4. Optionally, the sound collecting cylinder 4 is made of silica gel, and the silica gel cannot harden even at low temperature, so that the ear is more comfortable to press close to.

Claims

1. The telescopic hearing needle is characterized by comprising a telescopic rod (1) and a hearing ball (2);

the telescopic rod (1) can stretch and retract to adjust the length of the rod, one end of the telescopic rod (1) is a detection end, the other end of the telescopic rod is a listening end provided with the listening ball (2), the inside of the telescopic rod (1) is of a hollow structure, and the listening ball (2) is provided with an opening structure;

and the hearing ball (2) is provided with a sound transmission hole (21) communicated with the hollow structure.

2. Telescopic hearing needle according to claim 1, characterized in that the sound transfer hole (21) extends in the length direction of the telescopic rod (1), and that the sound transfer hole (21) is a stepped hole.

3. Telescopic hearing needle according to claim 1 or 2, characterized in that the sound transfer aperture (21) has a diameter of 3mm.

4. A telescopic listening needle according to claim 1, wherein the telescopic rod (1) comprises a number of telescopic joints (11);

the telescopic joints (11) are sleeved and connected, and positioning pieces (3) are abutted between the telescopic joints (11); the relative position between the telescopic joints (11) is maintained by the positioning piece (3).

5. Telescopic hearing needle according to claim 4, characterized in that the positioning element (3) is a damping element or an elastic element and is arranged between two telescopic joints (11) which are mutually sleeved and in abutment with the telescopic joints (11).

6. The telescopic hearing needle according to claim 4, wherein the positioning element (3) is an arc-shaped elastic sheet, and the positioning element (3) is arranged between the telescopic joints (11) and is abutted with the two telescopic joints (11) in a sleeved mode.

7. Telescopic hearing needle according to claim 6, characterized in that the positioning element (3) is provided with a positioning projection (31) towards the telescopic joint (11), the telescopic joint (11) is correspondingly provided with a positioning hole (13), and the positioning hole (13) accommodates the positioning projection (31).

8. The telescopic hearing needle according to claim 1, characterized in that it further comprises a sound gathering barrel (4);

the sound collecting cylinder (4) is arranged on one side, close to the sound listening ball (2), of the telescopic rod (1), and is of a funnel-shaped flaring structure towards the sound listening ball (2).

9. The telescopic hearing needle as claimed in claim 8, wherein the sound gathering barrel (4) is made of silica gel.

10. A telescopic hearing needle according to claim 1, characterized in that the hearing ball (2) is of plastic material.