Checking fixture for checking eccentricity of crankshaft of refrigeration compressor

Abstract

The utility model belongs to the technical field of refrigeration compressor testing fixtures, and discloses a testing fixture for calibrating the eccentricity of a crankshaft of a refrigeration compressor. The utility model relates to a checking fixture for checking eccentricity of a crankshaft of a refrigeration compressor. The checking fixture comprises a base, a positioning block, a checking column, a bracket and a measuring meter, according to the testing fixture for calibrating the eccentricity of the crankshaft of the refrigeration compressor, the calibration column is placed in the positioning groove in the upper end face of the positioning block, the measuring head of the measuring meter abuts against the highest point of the circumferential side of the calibration column and reads the reading of the measuring meter, and then the main shaft of the crankshaft sample is placed in the positioning groove in the upper end face of the positioning block. The measuring head of the measuring meter abuts against the highest point of the circumferential side of the eccentric shaft of the crankshaft sample, the reading of the measuring meter is read, the difference value of the two readings of the measuring meter is the eccentricity deviation of the crankshaft sample, and the eccentricity of the crankshaft sample is accurately and rapidly corrected.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration compressor inspection tools, and particularly relates to an inspection tool for calibrating the eccentricity of a crankshaft of a refrigeration compressor. Background Art

[0002] At present, piston-type refrigerator compressors use a crank-link mechanism for reciprocating motion. Compressors with different displacement volumes correspond to different cylinder volumes, and the eccentricity of the crankshaft is the key factor determining the cylinder volume. When the manufacturer processes the crankshaft, it is necessary to confirm the eccentricity of the first sample. At present, manufacturers usually use the method of coordinate measuring or use a height gauge to measure the dimensions of each component and then calculate manually through formula conversion. This wastes working hours and is also prone to calculation errors. Therefore, it is necessary to design an inspection tool to accurately and quickly calibrate the eccentricity of the crankshaft. Content of the Utility Model

[0003] The purpose of the utility model is to provide an inspection tool for calibrating the eccentricity of a crankshaft of a refrigeration compressor, so as to accurately and quickly calibrate the eccentricity of the crankshaft.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An inspection tool for calibrating the eccentricity of a crankshaft of a refrigeration compressor includes a base, a positioning block, a calibration column, a bracket and a measuring gauge;

[0006] The positioning block is arranged on the base, and a positioning groove is arranged on the upper end surface of the positioning block. The positioning groove is used for placing the calibration column or the main shaft of the crankshaft sample;

[0007] The radius of the calibration column is the sum of the standard crankshaft eccentricity and the eccentric shaft radius of the set model;

[0008] The lower end of the bracket is connected to the base, and the measuring gauge is arranged at the upper end of the bracket. The measuring head of the measuring gauge faces downward;

[0009] The measuring head of the measuring gauge can abut against the circumferential side of the calibration column or the circumferential side of the eccentric shaft of the crankshaft sample.

[0010] Preferably, a plurality of calibration columns are provided, and the plurality of calibration columns are arranged coaxially, and the radius of each calibration column is different.

[0011] Preferably, four calibration columns are provided.

[0012] Preferably, the cross section of the positioning groove is V-shaped.

[0013] Preferably, the measuring gauge is a dial indicator.

[0014] Preferably, the body of the measuring instrument is detachably connected to the upper end of the bracket.

[0015] Preferably, the body of the measuring instrument is connected to the upper end of the bracket by bolts.

[0016] The beneficial effects of the present utility model are as follows:

[0017] The present utility model provides a fixture for calibrating the eccentricity of a crankshaft of a refrigeration compressor. First, place the calibration column in the positioning groove on the upper end face of the positioning block. Use the probe of the measuring instrument to abut against the highest point on the circumferential side of the calibration column and read the reading of the measuring instrument. Then, place the main shaft of the crankshaft sample in the positioning groove on the upper end face of the positioning block. Use the probe of the measuring instrument to abut against the highest point on the circumferential side of the eccentric shaft of the crankshaft sample and read the reading of the measuring instrument. The difference between the two readings of the measuring instrument is the eccentricity deviation of the crankshaft sample, enabling accurate and rapid calibration of the eccentricity of the crankshaft sample. Description of the Drawings

[0018] Figure 1 is the front view of the fixture for calibrating the eccentricity of the crankshaft of a refrigeration compressor according to the present utility model Figure 1 , Figure 1 in which the calibration column is placed in the positioning groove on the upper end face of the positioning block;

[0019] Figure 2 is the front view of the fixture for calibrating the eccentricity of the crankshaft of a refrigeration compressor according to the present utility model Figure 2 , Figure 2 in which the main shaft of the crankshaft sample is placed in the positioning groove on the upper end face of the positioning block;

[0020] Figure 3 is the left view of the fixture for calibrating the eccentricity of the crankshaft of a refrigeration compressor according to the present utility model, Figure 3 in which the main shaft of the crankshaft sample is placed in the positioning groove on the upper end face of the positioning block;

[0021] Figure 4 is the right view of the fixture for calibrating the eccentricity of the crankshaft of a refrigeration compressor according to the present utility model, Figure 3 in which the main shaft of the crankshaft sample is placed in the positioning groove on the upper end face of the positioning block;

[0022] Figure 5 is the front view of the calibration column of the present utility model. Detailed Embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0024] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] Combined with Figures 1 to 5 As shown, the present utility model provides a fixture for calibrating the eccentricity of a refrigeration compressor crankshaft, which includes a base 1, a positioning block 2, a calibration column 3, a bracket 4, and a measuring gauge 5.

[0026] A positioning block 2 is arranged on the upper end surface of the base 1, and a positioning groove 21 is arranged on the upper end surface of the positioning block 2. The positioning groove 21 is used to place the calibration column 3 or the main shaft of the crankshaft sample 6. Among them, the cross-section of the positioning groove 21 is V-shaped to realize the radial positioning of the calibration column 3 or the main shaft of the crankshaft sample 6.

[0027] The radius of the calibration column 3 is the sum of the eccentricity and the eccentric shaft radius of the standard crankshaft of the set model. In this embodiment, four calibration columns 3 are arranged coaxially, and the radii of the four calibration columns 3 are different. From left to right, the radii of the four calibration columns 3 increase in sequence, and each calibration column 3 corresponds to a different model standard crankshaft.

[0028] The lower end of the bracket 4 is connected to the base 1, and the measuring gauge 5 is arranged at the upper end of the bracket 4. Among them, the measuring gauge 5 is set as a micrometer, and the measuring head 51 of the measuring gauge 5 faces downward. The measuring head 51 of the measuring gauge 5 can abut against the circumferential side of the calibration column 3 or the circumferential side of the eccentric shaft of the crankshaft sample 6.

[0029] The body of the measuring gauge 5 is detachably connected to the upper end of the bracket 4 to facilitate the installation, disassembly, and replacement of the measuring gauge 5. Specifically, the body of the measuring gauge 5 is connected to the upper end of the bracket 4 through a bolt 52.

[0030] The process of calibrating the eccentricity of the refrigeration compressor crankshaft by using the fixture of the present utility model is as follows:

[0031] First, place the calibration column 3 in the positioning groove 21 on the upper end surface of the positioning block 2, and make the measuring head 51 of the measuring gauge 5 abut against the highest point on the circumferential side of the calibration column 3 and read the reading S1 of the measuring gauge 5. In this embodiment, as Figure 5As shown, when it is necessary to measure the leftmost calibration post 3, place the left half of the leftmost calibration post 3 in the positioning groove 21 on the upper end surface of the positioning block 2, and the probe 51 of the measuring gauge 5 abuts against the circumferential side of the right half of the leftmost calibration post 3. When it is necessary to measure other calibration posts 3, place the leftmost calibration post 3 in the positioning groove 21 on the upper end surface of the positioning block 2, and the probe 51 of the measuring gauge 5 abuts against the circumferential side of other calibration posts 3. Then remove the calibration post 3 from the positioning block 2, place the main shaft of the crankshaft sample 6 in the positioning groove 21 on the upper end surface of the positioning block 2, and by making the probe 51 of the measuring gauge 5 abut against the highest point on the circumferential side of the eccentric shaft of the crankshaft sample 6 and reading the reading S2 of the measuring gauge 5, the difference between the two readings S1 and S2 of the measuring gauge 5 is the eccentricity deviation of the crankshaft sample 6.

[0032] So far, this embodiment has been described in detail with reference to the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the fixture for calibrating the eccentricity of the crankshaft of the refrigeration compressor of the present invention. For the fixture for calibrating the eccentricity of the crankshaft of the refrigeration compressor described in the present invention, first place the calibration post 3 in the positioning groove 21 on the upper end surface of the positioning block 2, make the probe 51 of the measuring gauge 5 abut against the highest point on the circumferential side of the calibration post 3 and read the reading of the measuring gauge 5, then place the main shaft of the crankshaft sample 6 in the positioning groove 21 on the upper end surface of the positioning block 2, make the probe 51 of the measuring gauge 5 abut against the highest point on the circumferential side of the eccentric shaft of the crankshaft sample 6 and read the reading of the measuring gauge 5, and the difference between the two readings of the measuring gauge 5 is the eccentricity deviation of the crankshaft sample 6, so as to accurately and quickly calibrate the eccentricity of the crankshaft sample 6.

[0033] Certainly, the above are only the preferred embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention and should be protected by the present invention.

Claims

1. A checking fixture for calibrating the eccentricity of a refrigeration compressor crankshaft, characterized in that: It includes a base, a positioning block, a calibration column, a bracket and a measuring table; The positioning block is arranged on the base, and the upper end surface of the positioning block is provided with a positioning groove, and the positioning groove is used to place the main shaft of the calibration column or the crankshaft sample; The radius of the calibration column is the sum of the eccentricity of the standard crankshaft of the set model and the radius of the eccentric shaft; The lower end of the bracket is connected to the base, the upper end of the bracket is provided with the measuring table, and the measuring head of the measuring table faces downward; The probe of the measuring table can abut against the circumferential side of the calibration cylinder or the circumferential side of the eccentric shaft of the crankshaft sample.

2. A checking fixture for calibrating the eccentricity of a refrigeration compressor crankshaft according to claim 1, characterized in that: The proofreading columns are provided in a plurality, the plurality of proofreading columns are coaxially arranged, and the radius of each proofreading column is different.

3. A checking fixture for calibrating the eccentricity of a refrigeration compressor crankshaft according to claim 2, characterized in that: The number of the calibration columns is four.

4. A checking fixture for calibrating the eccentricity of a refrigeration compressor crankshaft according to claim 1, characterized in that: The cross section of the positioning groove is V-shaped.

5. A checking fixture for calibrating the eccentricity of a refrigeration compressor crankshaft according to claim 1, characterized in that: The measuring gauge is configured as a micrometer.

6. A checking fixture for calibrating the eccentricity of a refrigeration compressor crankshaft according to claim 1, characterized in that: The meter body of the measuring meter is detachably connected to the upper end of the bracket.

7. A checking fixture for calibrating the eccentricity of a crankshaft of a refrigeration compressor according to claim 6, characterized in that: The meter body of the measuring meter is connected to the upper end of the bracket via bolts.

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