CN210268450U

CN210268450U - Length measuring device

Info

Publication number: CN210268450U
Application number: CN201921357669.0U
Authority: CN
Inventors: 朱淑平; 张翔; 苏喜文; 秦海忠
Original assignee: Oechsler Plastic Products Taicang Co Ltd
Current assignee: Oechsler Plastic Products Taicang Co Ltd
Priority date: 2019-08-21
Filing date: 2019-08-21
Publication date: 2020-04-07
Anticipated expiration: 2029-08-21

Abstract

The utility model discloses a length measuring device, which comprises a base, a positioning block and a measuring module, wherein the base comprises an upper step and a lower step which are integrally connected to form the base; the positioning block is fixed on the upper step; the measuring module comprises a sliding rail, a sliding block, a limiting block, a fixed seat and a measuring instrument, the sliding rail, the limiting block and the fixed seat are respectively fixed on the lower step, the sliding block is arranged on the sliding rail and connected with the sliding rail, the sliding block is located between the upper step and the limiting block, the measuring instrument is fixed on the fixed seat, and a measuring head of the measuring instrument is in contact with the sliding block. During measurement, a measured piece is placed on the upper step and is tightly leaned on the positioning block, and the length of the measured piece is obtained according to the reading of the measuring instrument. The length measuring device has the advantages of simple and reliable structure, convenience in assembly, lower cost, simplicity and convenience in operation in use, high measuring result precision, small error and good reproducibility.

Description

Length measuring device

Technical Field

The utility model relates to a measure frock technical field, more specifically say, relate to a length measurement device of vacuum pump blade.

Background

The vacuum pump vane is one of the core fittings of the vacuum pump for vacuum pumping and obtaining a vacuum source. The length dimension of the vacuum pump vane must meet high precision requirements due to the assembly process requirements. Therefore, the length of the vacuum pump vane needs to be strictly checked. However, due to the semi-cylindrical special structure at the two ends of the vacuum pump blade, if the existing conventional measuring tools such as a micrometer and an optical projector are directly adopted for measurement, the measurement result is prone to have the problems of large error, low reproducibility and the like, and the actual measurement requirement cannot be met. Therefore, there is a need to design an improved measuring device to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a length measuring device, this length measuring device reasonable in design, simple structure is reliable, convenient assembling, and the cost is lower, easy and simple to handle during the use, and its measuring result precision is high, and the error is little, and the reproducibility is good.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a length measuring device comprises a base, a positioning block and a measuring module, wherein the base comprises an upper step and a lower step which are integrally connected to form the base; the positioning block is fixed on the upper step; the measuring module is fixed on the lower step; the measuring module comprises a slide rail, a slide block, a limiting block, a fixing seat and a measuring instrument, wherein the slide rail, the limiting block and the fixing seat are fixed on the lower step respectively, the slide rail and the fixing seat are fixed on two sides of the limiting block respectively, the slide rail is fixed on one side of the upper step, the fixing seat is fixed on one side of the upper step, the slide block is arranged on the slide rail and connected with the slide rail, the slide block is located between the upper step and the limiting block, the measuring instrument is fixed on the fixing seat, and a measuring head of the measuring instrument is in contact with the slide block. The base is used as a carrier and is used for connecting and fixing the positioning block and the measuring module and carrying a measured piece; the positioning block provides a reference position for measurement and is convenient for fixing a measured piece; the measuring module is used for accurately measuring the length of a measured piece, specifically, the sliding block can slide on the sliding rail, the position of the sliding block is adjusted according to the length of the measured piece, so that the sliding block is in contact with the measured piece, and the measuring head of the measuring instrument can adjust the position along with the movement of the sliding block and is always in contact with the sliding block, so that the length of the measured piece can be indirectly obtained according to the reading displayed by the measuring instrument.

Preferably, in the above length measuring device, the positioning block is an L-shaped right-angle positioning block. The positioning block in the shape is convenient for measurement operation and is beneficial to improving measurement precision, and during operation, the measured piece can be accurately positioned only by abutting against the positioning block.

Preferably, in the above length measuring device, the positioning block is fixed to the upper step by a set of pins. The positioning block is connected by the pin, so that the positioning block is stable and reliable, and the positioning block can be conveniently replaced according to different measured pieces.

Preferably, in the above length measuring device, the cross-sectional shape of the slide rail is an i-shape. The I-shaped sliding rail can greatly reduce the vibration generated when the sliding block slides on the sliding rail, and the measurement precision is improved.

Preferably, in the length measuring device, the slide rail, the limiting block and the fixing seat are fixed on the lower step through a set of screws respectively. The screw connection can play a reliable fixed role and is convenient for assembling and replacing parts.

Preferably, in the length measuring device, the fixing base is provided with a mounting hole, and the measuring instrument is inserted into the mounting hole and fixed to the fixing base through a screw. The connecting mode can firmly fix the measuring instrument on the fixed seat, measurement errors caused by looseness of the measuring instrument cannot occur, and meanwhile, the assembly is convenient.

Preferably, in the above length measuring device, the measuring instrument is a dial indicator. The dial gauge is simple to use and high in precision.

As an improvement of the present invention, in the length measuring device, the slider is further provided with a protruding rod, and the protruding rod is integrally connected to one end of the slider; the fixed seat is also provided with a through hole; the convex rod penetrates through the through hole, a spring is further sleeved on the convex rod, and the spring is located between the sliding block and the fixed seat. After the spring is added, the sliding block can automatically lean against the measured piece, so that the operation is convenient, and the measuring efficiency is improved. Furthermore, the spring protects the measuring device to a certain extent against sudden impacts by the slide.

Preferably, in the above length measuring device, the spring has an elastic force in a range of 2 to 4N. The elasticity of the spring is controlled to be 2-4N, the measured piece is not damaged, and the spring can be tightly attached to the measured piece, so that the measurement error is reduced, and the measurement repeatability is improved.

Has the advantages that: compared with the prior art, the utility model has the advantages of it is following: length measurement device, simple structure is reliable, convenient assembling, the cost is lower, easy and simple to handle during the use, its measuring result precision is high, the error is little, the reproducibility is good.

Drawings

Fig. 1 is a schematic perspective view of a length measuring device according to embodiment 1.

Fig. 2 is a schematic perspective view of the length measuring device according to embodiment 2.

In the figure, a base 1, a positioning block 2, a measuring module 3, an upper step 11, a lower step 12, a pin 21, a slide rail 31, a slide block 32, a limiting block 33, a fixing seat 34, a measuring instrument 35, a mounting hole 341, a convex rod 321 and a through hole 342 are arranged.

Detailed Description

The invention is further explained by combining the attached drawings and the specific embodiments.

Example 1

As shown in fig. 1, a length measuring device comprises a base 1, a positioning block 2 and a measuring module 3, wherein the base 1 comprises an upper step 11 and a lower step 12, and the upper step 11 and the lower step 12 are integrally connected to form the base 1; the positioning block 2 is fixed on the upper step 11; the measuring module 3 comprises a slide rail 31, a slide block 32, a limit block 33, a fixed seat 34 and a measuring instrument 35, wherein the slide rail 31, the limit block 33 and the fixed seat 34 are respectively fixed on the lower step 12, the slide rail 31 and the fixed seat 34 are respectively fixed on two sides of the limit block 33, the slide rail 31 is fixed on one side close to the upper step 11, the fixed seat 34 is fixed on one side far away from the upper step 11, the slide block 32 is arranged on the slide rail 31 and connected with the slide rail 31, the slide block 32 is arranged between the upper step 11 and the limit block 33, the measuring instrument 35 is fixed on the fixed seat 34, and a measuring head of the measuring instrument 35 is in contact with the slide block 32. Before measurement, the standard part is used for zero setting. Then, the measured piece is placed on the upper step 11 and is abutted against the positioning block 2, the sliding block 32 is pushed to be in contact with the measured piece, and when the measuring head of the measuring instrument 35 is stably in contact with the sliding block 32, the length of the measured piece is obtained according to the index of the measuring instrument 35.

Example 2

As shown in fig. 2, a length measuring device comprises a base 1, a positioning block 2 and a measuring module 3, wherein the base 1 comprises an upper step 11 and a lower step 12, and the upper step 11 and the lower step 12 are integrally connected to form the base 1; the positioning block 2 is fixed on the upper step 11; the measuring module 3 comprises a slide rail 31, a slide block 32, a limit block 33, a fixed seat 34 and a measuring instrument 35, wherein the slide rail 31, the limit block 33 and the fixed seat 34 are respectively fixed on the lower step 12, the slide rail 31 and the fixed seat 34 are respectively fixed on two sides of the limit block 33, the slide rail 31 is fixed on one side close to the upper step 11, the fixed seat 34 is fixed on one side far away from the upper step 11, the slide block 32 is arranged on the slide rail 31 and connected with the slide rail 31, the slide block 32 is arranged between the upper step 11 and the limit block 33, the measuring instrument 35 is fixed on the fixed seat 34, and a measuring head of the measuring instrument 35 is in contact with the slide block 32. The positioning block 2 is an L-shaped right-angle positioning block. The positioning block 2 is fixed on the upper step 11 through a group of pins 21. The cross section of the slide rail 31 is in an i shape. The slide rail 31, the limiting block 33 and the fixing seat 34 are respectively fixed on the lower step 12 through a set of screws. The fixing base 34 is provided with a mounting hole 341, and the measuring instrument 35 is inserted into the mounting hole 341 and fixed on the fixing base 34 by a screw. The measuring instrument 35 is a dial indicator. The sliding block 32 is further provided with a convex rod 321, and the convex rod 321 is integrally connected to one end of the sliding block 32; the fixed seat 34 is also provided with a through hole 342; the protruding rod 321 is inserted into the through hole 342, and a spring (not shown) is further sleeved on the protruding rod 321 and located between the sliding block 32 and the fixed seat 34. The elastic force range of the spring is 2-4N. Before measurement, the standard part is used for zero setting. Then, a measured piece is placed on the upper step 11 and is tightly close to the positioning block 2, the sliding block 32 is automatically contacted with the measured piece under the action of a spring, and when a measuring head of the dial indicator is stably contacted with the sliding block 32, the length of the measured piece is obtained according to the number of the dial indicator.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications can be made without departing from the principles of the present invention, and these modifications should also be regarded as the protection scope of the present invention.

Claims

1. A length measuring device, characterized by: the measuring device comprises a base (1), a positioning block (2) and a measuring module (3), wherein the base (1) comprises an upper step (11) and a lower step (12), and the upper step (11) and the lower step (12) are integrally connected to form the base (1); the positioning block (2) is fixed on the upper step (11); the measuring module (3) comprises a slide rail (31), a slide block (32), a limiting block (33), a fixed seat (34) and a measuring instrument (35), the slide rail (31), the limiting block (33) and the fixed seat (34) are respectively fixed on the lower step (12), the slide rail (31) and the fixed seat (34) are respectively fixed on two sides of the limit block (33), wherein the slide rail (31) is fixed at one side close to the upper step (11), the fixed seat (34) is fixed on one side far away from the upper step (11), the sliding block (32) is arranged on the sliding rail (31) and connected with the sliding rail (31), the sliding block (32) is positioned between the upper step (11) and the limiting block (33), the measuring instrument (35) is fixed on the fixed seat (34), and the measuring head of the measuring device (35) is in contact with the slide (32).

2. The length measuring device according to claim 1, wherein: the positioning block (2) is an L-shaped right-angle positioning block.

3. The length measuring device according to claim 1, wherein: the positioning block (2) is fixed on the upper step (11) through a group of pins (21).

4. The length measuring device according to claim 1, wherein: the cross section of the sliding rail (31) is I-shaped.

5. The length measuring device according to claim 1, wherein: the sliding rail (31), the limiting block (33) and the fixing seat (34) are fixed on the lower step (12) through a group of screws respectively.

6. The length measuring device according to claim 1, wherein: the measuring instrument is characterized in that the fixing seat (34) is provided with a mounting hole (341), and the measuring instrument (35) penetrates through the mounting hole (341) and is fixed on the fixing seat (34) through a screw.

7. The length measuring device according to claim 1 or 6, wherein: the measuring instrument (35) is a dial indicator.

8. The length measuring device according to claim 1, wherein: the sliding block (32) is also provided with a convex rod (321), and the convex rod (321) is integrally connected to one end of the sliding block (32); the fixed seat (34) is also provided with a through hole (342); the convex rod (321) penetrates through the through hole (342), a spring is further sleeved on the convex rod (321), and the spring is located between the sliding block (32) and the fixed seat (34).

9. The length measuring device of claim 8, wherein: the elastic force range of the spring is 2-4N.