CN217980165U

CN217980165U - Coaxiality gauge for shaft end threaded hole

Info

Publication number: CN217980165U
Application number: CN202221911140.0U
Authority: CN
Inventors: 廖晓凤; 蒋琬琪; 苏文; 刘维俊
Original assignee: Sichuan Pan Asia Power Technology Co ltd
Current assignee: Sichuan Pan Asia Power Technology Co ltd
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2022-12-06
Anticipated expiration: 2032-07-22

Abstract

The utility model provides a coaxiality gauge for a shaft end threaded hole, which comprises a sleeve and a measuring pin, wherein the measuring pin is arranged in the sleeve in a penetrating way; the measuring pin comprises a reference part and a threaded part, the reference part is coaxially connected with the threaded part, one end of the sleeve is meshed with the reference part, the other end of the sleeve is meshed with the shaft end, and when the two ends of the sleeve are completely meshed with the shaft end and the reference part respectively, the threaded part is matched with the threaded hole. The inner cavity of the sleeve is in a step shape, the large inner diameter section of the inner cavity is matched with the shaft end, and the small inner diameter section of the inner cavity is matched with the reference part. The method solves the problems that when the coaxiality of the small end of the crankshaft is detected to meet the requirement, the common visual measurement and measuring tool measurement are low in accuracy, time-consuming and labor-consuming, high in requirement on the operation quality of detection personnel and the like.

Description

Coaxiality detection tool for shaft end threaded hole

Technical Field

The utility model relates to an examine technical field, particularly, relate to an utensil is examined to axiality of axle head screw hole.

Background

The crankshaft is the most important component in the engine. The crankshaft is subjected to the combined action of centrifugal force of the rotating mass, gas inertia force of periodic variation and reciprocating inertia force, so that the crankshaft is subjected to the action of bending and twisting load. Therefore, the crankshaft is required to have sufficient strength and rigidity, and the surface of the journal needs to be wear-resistant, work uniformly and balance well.

In the process of crankshaft production, a counter bore can be formed in the end part of a crankshaft small-head journal, the counter bore is mostly a threaded hole, and the coaxiality among the crankshaft small-head journal, the small-head threaded hole and the counter bore is an important parameter for evaluating whether a crankshaft small head is qualified or not. At present, the commonly used detection method is generally visual inspection or detection by using a measuring tool. The operation is more complicated, the error rate is higher, the visual inspection can only be judged by experience, and the accuracy is lower. The measuring tool is used for detection, so that time and labor are wasted, and the requirement on the operation quality of detection personnel is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an utensil is examined to axiality of axle head screw hole, it has solved when whether the axiality of detecting the bent axle microcephaly satisfies the requirement, and common range estimation and measuring tool measurement not only the degree of accuracy are lower, waste time and energy simultaneously, require higher scheduling problem to measurement personnel's operation quality.

The embodiment of the utility model discloses a realize through following technical scheme: a coaxiality gauge for a shaft end threaded hole comprises a sleeve and a measuring pin, wherein the measuring pin penetrates through the sleeve;

the measuring pin comprises a reference part and a threaded part, the reference part is coaxially connected with the threaded part, one end of the sleeve is meshed with the reference part, the other end of the sleeve is meshed with the shaft end, and when the two ends of the sleeve are completely meshed with the shaft end and the reference part respectively, the threaded part is matched with the threaded hole.

Further, the inner cavity of the sleeve is in a step shape, the large inner diameter section of the inner cavity is matched with the shaft end, and the small inner diameter section of the inner cavity is matched with the reference part.

Furthermore, chamfers are arranged at two ends of the inner cavity of the sleeve.

Furthermore, the outer diameter of the reference part is larger than that of the threaded part, and one end, close to the threaded part, of the reference part is provided with a chamfer.

Furthermore, the device also comprises a limiting plate, wherein the limiting plate is arranged at one end, away from the threaded part, of the reference part.

Furthermore, a groove is reserved between the limiting plate and the reference part.

Further, still include the round pin handle, the round pin handle sets up the limiting plate is kept away from the one end of benchmark portion, it has anti-skidding line to surround to be provided with on the round pin handle.

The utility model discloses technical scheme has following advantage and beneficial effect at least:

1. the utility model relates to a rationally, simple structure, an utensil is examined to axiality of axle head screw hole, through with sleeve pot head on the axle serves, insert the survey round pin from the other end again, after screw portion can cooperate completely with the screw hole, telescopic minor bore section and benchmark portion can gomphosis completely, represent promptly that the axiality between bent axle microcephaly axle journal, microcephaly screw and the counter bore is qualified, otherwise, then this part is unqualified. The method is simple and quick, has low technical requirements on operators, and solves the problems that the common visual measurement and measuring tool measurement are low in accuracy, time-consuming and labor-consuming, high in requirements on the operation quality of detection personnel and the like.

2. During measurement, after the measuring pin is inserted into the sleeve, the threaded part is rotatably occluded in the threaded hole until the threaded part is completely matched, the limiting plate is abutted against the sleeve, and if the limiting plate is in parallel contact with the end part of the sleeve and has no gap, the coaxiality of the threaded hole and the shaft end is higher in precision, and the workpiece is qualified.

3. Because survey the round pin after long-time use, when benchmark portion and little internal diameter section cooperate, adnexed impurity and dust on benchmark portion outer wall and the little internal diameter section inner wall, can be scraped the contained angle between benchmark portion and the limiting plate and go out, produce the influence easily to measuring result, take out and survey after the clearance again, can influence work efficiency again, and then through setting up the recess between benchmark portion and limiting plate, make dust and the impurity of being scraped and keeping in the recess, treat to survey and clear up alone again after finishing, not only can not influence measurement accuracy, can also avoid leading to many times to measure because of the deposition simultaneously, and the work efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a structural schematic diagram of the tool for checking coaxiality of the threaded hole at the shaft end provided by the invention during detection;

fig. 2 is a schematic view of a pin measuring structure of a coaxiality measuring tool for a threaded hole at a shaft end provided by the utility model;

fig. 3 is a cross-sectional view of a coaxiality gauge sleeve of a shaft end threaded hole provided by the present invention;

an icon: 1. shaft end, 2, threaded hole, 3, sleeve, 31, large inner diameter section, 32, small inner diameter section, 33, chamfer, 4, measuring pin, 41, reference part, 42, threaded part, 5, limiting plate, 6, groove, 7 and pin handle.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 3, the present embodiment provides a coaxiality inspection device for a threaded hole at an axial end, including a sleeve 3 and a measuring pin 4, wherein the measuring pin 4 is detachably inserted into the sleeve 3, and when the measuring pin 4 is matched with the sleeve 3, the measuring pin 4 is coaxial with the sleeve, and has a slight deviation due to abrasion, but is within an error range;

the measuring pin 4 comprises a reference part 41 and a threaded part 42, the reference part 41 is coaxially connected with the threaded part 42 and is integrally formed, as shown in fig. 1, one end of the sleeve 3 is meshed with the reference part 41, the other end of the sleeve 3 is meshed with the shaft end 1, when the threaded part 42 and the threaded hole 2 can be completely matched, the small inner diameter section 32 of the sleeve 3 and the reference part 41 can be completely embedded, namely, the coaxiality among the crankshaft small-head journal, the small-head threaded hole and the counter bore is qualified, otherwise, the part is unqualified. The method is simple and quick, has low technical requirements on operators, and solves the problems that the common visual measurement and measuring tool measurement are low in accuracy, time-consuming and labor-consuming, high in requirements on the operation quality of detection personnel and the like.

As shown in fig. 1-3, during specific implementation, the inner cavity of the sleeve 3 is stepped, when measuring, the sleeve 3 is firstly sleeved on the shaft end 1, so that the large inner diameter section 31 of the inner cavity is matched with the shaft end 1, the shaft end 1 is abutted against the step, the measuring pin 41 is inserted into the inner cavity from the other end of the sleeve 3, when the threaded portion 42 can be completely screwed into the threaded hole 2, the small inner diameter section 32 of the inner cavity is matched with the reference portion 41, and no large resistance exists, that is, the current shaft hole is qualified.

As shown in fig. 3, chamfers 33 have been all seted up at the both ends of sleeve 3 inner chamber, during concrete implementation, when sleeving sleeve 3 on axle head 1, because the big internal diameter section 31 of sleeve 3 is less with axle head 1 external diameter difference, and then need set up chamfer 33 in big internal diameter section 31 accent department, be convenient for be connected with axle head 1.

Similarly, the chamfer 33 is also formed at the cavity of the small inner diameter section 32, so that the measuring pin 4 can be conveniently inserted, and the measuring operation can be completed even if the reference part 41 enters the small inner diameter section 32.

As shown in fig. 2, the reference portion 41 has an outer diameter larger than that of the threaded portion 42, and in practical implementation, when the plug pin 4 is inserted into the sleeve 3, the threaded portion 42 needs to have a diameter smaller than that of the reference portion 41. Meanwhile, one end of the reference part 41 close to the threaded part 42 is provided with a chamfer 33, so that the reference part 41 is matched with the small inner diameter section 32 when the bolt 4 is matched with the sleeve 3 for measurement.

As shown in fig. 1 and 2, a limiting plate 5 is further included, and the limiting plate 5 is disposed at an end of the reference portion 41 away from the threaded portion 42. In a specific implementation, when the measuring pin 4 is inserted into the sleeve 3 during measurement, the threaded part 42 is rotationally engaged with the threaded hole 2 until the threaded part is completely engaged, the limit plate 5 is abutted against the sleeve 3 at the moment, and the limit plate 5 is in parallel contact with the end part of the sleeve 3 without a gap, so that the coaxiality of the threaded hole 2 and the shaft end 1 is higher in precision at the moment, and the workpiece is qualified.

As shown in fig. 1 and 2, a groove 6 is left between the stopper plate 5 and the reference portion 41. When the measurement device is used for a long time, after the measurement pin 4 is used for a long time, when the reference part 41 is matched with the small inner diameter section 32, impurities and dust attached to the outer wall of the reference part 41 and the inner wall of the small inner diameter section 32 can be scraped, the included angle between the reference part 41 and the limiting plate can be easily affected, the measurement result can be taken out and cleaned, the work efficiency can be affected, the groove 6 is further formed between the reference part 41 and the limiting plate 5, the scraped dust and the impurities can be temporarily stored in the groove 6, the measurement result can be independently cleaned after the measurement is finished, the measurement precision cannot be affected, meanwhile, multiple measurements caused by dust deposition can be avoided, and the work efficiency is improved.

As shown in fig. 1 and 2, in specific implementation, the anti-slip measuring device further includes a pin handle 7, the pin handle 7 is disposed at one end of the limiting plate 5 away from the reference portion 41, so as to facilitate the operation of inserting the measuring pin 4 into the sleeve 3, and meanwhile, the pin handle 7 is circumferentially provided with anti-slip threads to avoid slipping.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an utensil is examined to axiality of axle head screw hole which characterized in that: the device comprises a sleeve (3) and a measuring pin (4), wherein the measuring pin (4) penetrates through the sleeve (3);

survey round pin (4) including benchmark portion (41) and screw thread portion (42), benchmark portion (41) with screw thread portion (42) coaxial coupling, sleeve (3) one end with benchmark portion (41) interlock, sleeve (3) other end and axle head (1) interlock work as sleeve (3) both ends respectively with axle head (1) and benchmark portion (41) complete interlock back, screw thread portion (42) and screw hole (2) cooperation.

2. The tool for checking the coaxiality of the threaded hole at the shaft end is characterized in that the inner cavity of the sleeve (3) is stepped, a large inner diameter section (31) of the inner cavity is matched with the shaft end (1), and a small inner diameter section (32) of the inner cavity is matched with the reference part (41).

3. The tool for detecting the coaxiality of the threaded hole at the shaft end is characterized in that chamfers (33) are arranged at two ends of an inner cavity of the sleeve (3).

4. The tool for checking the coaxiality of the threaded hole of the shaft end as claimed in any one of claims 1 to 3, wherein the outer diameter of the reference portion (41) is larger than that of the threaded portion (42), and a chamfer (33) is formed at one end, close to the threaded portion (42), of the reference portion (41).

5. The tool for checking the coaxiality of the threaded hole at the shaft end according to claim 4, further comprising a limiting plate (5), wherein the limiting plate (5) is arranged at one end, away from the threaded portion (42), of the reference portion (41).

6. The tool for checking the coaxiality of the threaded hole at the shaft end is characterized in that a groove (6) is reserved between the limiting plate (5) and the reference part (41).

7. The tool for checking the coaxiality of the threaded hole at the shaft end is characterized by further comprising a pin handle (7), wherein the pin handle (7) is arranged at one end, away from the reference portion (41), of the limiting plate (5), and anti-skidding threads are arranged on the pin handle (7) in a surrounding mode.