CN-224215991-U - Square part width detection measuring tool

CN224215991UCN 224215991 UCN224215991 UCN 224215991UCN-224215991-U

Abstract

The square part width detection measuring tool comprises a body, a screw, a mandrel, a left shaft sleeve, a bearing, a right shaft sleeve and a self-made compression screw, wherein the body is connected with a dial gauge head through the screw, a U-shaped groove of the body is filled with a rolling friction assembly formed by the mandrel, the left shaft sleeve, the bearing and the right shaft sleeve are sequentially filled outside the mandrel shaft, the self-made compression screw is screwed into an internal thread hole in the center of the mandrel to tightly press and fasten the whole assembly with the body, and a bearing outer ring replaces the dial gauge head to be in rolling friction contact with the square part to realize size detection of the square part. The utility model adopts a mode of improving the sliding contact friction between the measuring head and the part into rolling contact friction, solves the technical problems of low detection precision, poor measurement stability and low efficiency of the width dimension of the square part, and is easy to scratch the surface of the part or abrade the measuring head, has reasonable structure, simple and convenient operation and easy operation, greatly reduces the requirements on operators, obviously improves the production efficiency and saves the production cost.

Inventors

LI LEI
ZHANG YANJUN
MA ZHONGWEI
LI JUKUI
CHENG BIN
WANG JIANMING

Assignees

陕西渭河工模具有限公司

Dates

Publication Date: 20260508
Application Date: 20250506

Claims (6)

1. A square part width detection measuring tool is characterized by comprising a body (1), a screw (2), a mandrel (3), a left shaft sleeve (4), a bearing (5), a right shaft sleeve (6) and a self-made compression screw (7), wherein the body (1) is connected with a dial indicator measuring head through the screw (2), a rolling friction assembly is arranged in a U-shaped groove (101) formed in the body (1), the rolling friction assembly is formed by the mandrel (3), the left shaft sleeve (4), the bearing (5) and the right shaft sleeve (6) are sequentially arranged outside the shaft body of the mandrel (3), the self-made compression screw (7) is screwed into a threaded hole in the center of the mandrel (3) to compress and fixedly connect the whole rolling friction assembly with the body (1), and the outer cylindrical surface of a bearing outer ring of the bearing (5) is used for replacing the rolling friction contact between the dial indicator measuring head and the square part to realize size detection of the square part.
2. The measuring tool according to claim 1, wherein the body (1) is provided with a central hole, the screw (2) is a countersunk screw, the countersunk screw penetrates through the central hole to connect the body (1) with the dial gauge head, the countersunk hole of the body (1) is matched with the conical surface of the countersunk screw head, and the threaded section of the countersunk screw is tightly matched with the threaded hole of the body (1).
3. The measuring tool according to claim 2, wherein the bottom of the body (1) is provided with a containing cavity (102), a plurality of parts of the bearing (5) are adapted to be contained in the containing cavity (102), and a left shaft sleeve (4) and a right shaft sleeve (6) are also adapted to be contained in the containing cavity (102).
4. The measuring tool according to claim 3, wherein the outer vertical side surfaces of the left shaft sleeve (4) and the right shaft sleeve (6) are attached to the inner vertical side surfaces of the accommodating cavity (102), and the inner vertical side surfaces of the left shaft sleeve (4) and the right shaft sleeve (6) are attached to the inner bearing ring of the bearing (5).
5. The measuring tool according to claim 1, 2 or 3, wherein the left end of the fitting mandrel (3) is clamped on the outer vertical end surface of the U-shaped groove (101) formed on the body (1) Is provided with a limit boss (301).
6. The gauge according to claim 5, wherein the dial indicator is a digital display dial indicator.

Description

Square part width detection measuring tool Technical Field The utility model belongs to the technical field of auxiliary detection of a physical measurement test dial indicator, and particularly relates to a square part width detection measuring tool. Background A gauge is a generic term for a tool or device used to measure, verify, and calibrate parameters such as part size, shape, positional tolerances, surface quality, etc. The product is ensured to meet the design requirement and standard specification, is widely applied to the fields of production, scientific research and the like, can well assist production and processing, ensures that the product is qualified, and is an indispensable auxiliary tool for production and processing. In the prior art, when detecting the width of a part by means of the dial indicator, the dial indicator measuring head and the part are in sliding contact friction generally, but when in sliding contact friction, the measuring head of the dial indicator is in direct contact with the surface of the part, the friction resistance is large, and the large friction resistance can cause the measuring head to generate tiny displacement or deformation in the measuring process, so that the measuring accuracy is influenced. The long-time sliding contact friction can lead to abrasion of the measuring head and the surface of the part, the shape and the size of the measuring head after abrasion can be changed, and further measurement errors are introduced, the errors are particularly remarkable in precise measurement, and the size of the part can be failed. Moreover, because the resistance of sliding contact friction is large, the measuring head may slide or jump due to the tiny external force applied in the measuring process, and the unstable measuring state can cause fluctuation of the measuring result, so that the repeatability of measurement is reduced. In addition, the sliding contact friction can accelerate the abrasion of the measuring head, the service life of the measuring head is shortened, and frequent replacement of the measuring head not only increases the cost, but also can influence the continuity and accuracy of measurement. In some cases, sliding contact friction may cause the surface of the part to be scratched or to leave an impression, which is an unacceptable defect for parts requiring a high surface quality. Moreover, because the resistance of sliding contact friction is larger, an operator needs to apply larger force to move the measuring head in the measuring process, which not only increases the operation difficulty, but also can cause measuring errors due to uneven force application. Finally, sliding contact friction requires a more careful and slow movement by the operator to ensure the accuracy of the measurement by the stylus, which results in slower measurement speeds and reduced production efficiency. In this regard, the following improvements have been proposed. Disclosure of utility model The utility model solves the technical problems of low part detection precision, poor measurement stability, low efficiency and easiness in scratching the surface of a part or wearing the measuring head caused by the fact that the sliding friction of the measuring head and the part is improved into rolling friction when the square part is subjected to width dimension detection by means of a dial indicator. The technical scheme includes that the square part width detection measuring tool comprises a body, a screw, a mandrel, a left shaft sleeve, a bearing, a right shaft sleeve and a self-made compression screw, wherein the body is connected with a dial gauge head through the screw, a rolling friction assembly is arranged in a U-shaped groove formed in the body and comprises the mandrel, the left shaft sleeve, the bearing and the right shaft sleeve are sequentially arranged outside the mandrel shaft, the self-made compression screw is screwed into an inner threaded hole in the center of the mandrel to tightly press and connect the whole rolling friction assembly with the body, and the outer cylindrical surface of an outer ring of the bearing is used for replacing the rolling friction contact between the dial gauge head and the square part to realize size detection of the square part. In the embodiment, the body is further provided with a center hole, the screw is a countersunk screw, the countersunk screw penetrates through the center hole to connect the body with the dial gauge head, the countersunk hole of the body is matched with the conical surface of the countersunk screw head, and the thread section of the countersunk screw is tightly matched with the threaded hole of the body. In the embodiment, the bottom of the body is further provided with the accommodating cavity, most of the bearing is accommodated in the accommodating cavity in an adaptive manner, and the left shaft sleeve and the right shaft sleeve are accommodated in the accommodating cavity in an adaptive man