Inspection tool

Abstract

The utility model relates to the field of product quality detection, and particularly discloses an inspection tool which comprises a positioning block and a sliding pin shaft, a first through hole is formed in the positioning block, and the sliding pin shaft is matched with the positioning block and used for detecting the concentricity of a workpiece to be detected; the workpiece to be detected is provided with a first inner hole and a second inner hole, the upper end face of the positioning block is provided with a positioning part, and when the workpiece to be detected is subjected to concentricity detection, the second inner hole is matched with the positioning part; the first inner hole, the second inner hole and the first through hole jointly form a channel, and the sliding pin shaft is a linear shaft. During detection, if the lower end face of the sliding pin shaft can pass through the positioning block, the concentricity of the first inner hole and the second inner hole of the workpiece to be detected is qualified; and if the lower end face of the sliding pin shaft cannot pass through the positioning block or is blocked when passing through the channel, the concentricity of the first inner hole and the second inner hole of the workpiece to be detected is unqualified, so that the detection efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of product quality detection, in particular to a test tool. BACKGROUND

[0002] The aluminum pipe fixing seat is applied to the grass trimmer, is installed on the motor of the grass trimmer during use, is sleeved with the cutting rod, and thus the cutting rod is connected with the motor, so that the aluminum pipe fixing seat comprises a sleeving part and a mounting part, the mounting part is connected with the motor seat, the sleeving part is matched with the cutting rod, has two inner holes with different diameters, the two inner holes need to be concentric to ensure smooth installation of the cutting rod and safe and reliable operation.

[0003] In the prior art, the concentricity of the aluminum pipe fixing seat is mainly detected by a three-coordinate projection detection device, a plurality of points are measured to calculate the actual center line position, compared with the ideal center line position, and whether the deviation is within the allowable range is judged, but this detection method has the following defects: 1. The effect of three-coordinate projection detection is related to the precision of the device itself, however, the high-precision three-coordinate projection detection machine is expensive and has high use cost. 2. The device has high requirements on the environment, and the surrounding equipment and other environmental vibrations will affect the accuracy of the device measurement. 3. It is very time-consuming, and the number of detection of a device at a time is limited, even if there are enough test operators, a large number of detections cannot be performed at the same time, and the detection efficiency is low. CONTENT OF THE UTILITY MODEL

[0004] The utility model at least one specific implementation mode is to solve the defects existing in the prior art, provides a test tool.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the technical scheme as follows:

[0006] A test tool is suitable for detecting the concentricity of a workpiece to be measured, and the test tool comprises:

[0007] A positioning block is provided with a first through hole, and the two ends of the first through hole pass through the upper end face and the lower end face of the positioning block;

[0008] A sliding pin shaft is matched with the positioning block and is used for detecting the concentricity of the workpiece to be measured;

[0009] The upper end face of the positioning block is provided with a positioning part, and when the concentricity of the workpiece to be measured is detected, the second inner hole is matched with the positioning part;

[0010] The first inner hole, the second inner hole and the first through hole jointly form a channel, and the sliding pin shaft is a straight shaft.

[0011] The shaft diameter of the sliding pin shaft matches the channel, and when detecting, if the lower end surface of the sliding pin shaft can pass through the positioning block, the first inner hole and the second inner hole of the workpiece to be detected are concentric and qualified;

[0012] If the lower end surface of the sliding pin shaft cannot pass through the positioning block, or is blocked when passing through the channel, the first inner hole and the second inner hole of the workpiece to be detected are concentric and unqualified.

[0013] Further, the base further comprises a base plate and a support installed on the base plate, wherein the positioning block is fixedly connected to the base plate by a fixing member, and the base plate is provided with a second through hole penetrating through the upper end surface and the lower end surface of the base plate.

[0014] Further, when the diameter of the second through hole is less than or equal to the diameter of the first through hole, the first through hole is concentric with the second through hole.

[0015] Further, the sliding pin shaft comprises an upper rod and a lower rod, and the upper rod and the lower rod are concentric.

[0016] Further, the diameter of the upper rod is less than or equal to the diameter of the first inner hole, and the diameter of the lower rod is less than or equal to the diameter of the first through hole.

[0017] Further, the length of the upper rod is less than or equal to the length of the first inner hole, and the total length of the upper rod and the lower rod is greater than the total length of the first inner hole, the second inner hole, the first through hole and the second through hole.

[0018] Further, the sliding pin shaft further comprises a pin head installed at one end of the upper rod.

[0019] Further, the center line of the upper end surface and the lower end surface of the positioning block forms a first center line, the center line of the inner hole of the upper end surface and the lower end surface of the workpiece to be detected forms a second center line, and the center line of the upper end surface and the lower end surface of the base plate forms a third center line, and when the first inner hole and the second inner hole of the workpiece to be detected are concentric and qualified, the first center line, the second center line and the third center line coincide.

[0020] Further, the workpiece to be detected is an aluminum pipe fixing seat.

[0021] Further, the upper rod and the lower rod are integrally formed.

[0022] The inspection tool provided by the present application has the beneficial technical effects of the prior art, that is, whether the sliding pin shaft can smoothly pass through the channel formed by the first inner hole, the second inner hole and the first through hole can detect whether the first inner hole and the second inner hole of the workpiece to be detected are concentric and qualified, which reduces the cost, is simple to operate, can perform a large number of detections, and greatly improves the detection efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 The structure diagram of the test tool in the embodiment of the present application.

[0025] Figure 2 The structure diagram of the workpiece to be measured in the embodiment of the present application.

[0026] Figure 3 The structure diagram of the workpiece to be measured in the embodiment of the present application. Figure 2 The schematic diagram of another view.

[0027] Figure 4 The sectional view along the line A-A in the embodiment of the present application. Figure 3

[0028] The schematic diagram of the explosion of the test tool in the embodiment of the present application. Figure 5

[0029] The schematic diagram of the workpiece to be measured installed in the positioning block. Figure 6

[0030] The sectional view along the line B-B in the embodiment of the present application. Figure 7 Figure 6 The schematic diagram of the explosion of the positioning block and the base.

[0031] Figure 8 The structure diagram of the test tool in the embodiment of the present application when detecting.

[0032] Figure 9 The sectional view along the line C-C in the embodiment of the present application.

[0033] Specific embodiments Figure 10 Figure 9 The technical solutions of the present application will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application. Refer to

[0034] ,

[0035] Figure 1 Figure 2 ​​​The utility model provides a kind of inspection tool 100, including positioning block 10, base 20, sliding pin 30, wherein, positioning block 10 is installed on base 20, sliding pin 30 is inserted in positioning block 10, and sliding pin 30 is linear shaft, the inspection tool 100 is used to detect the concentricity of workpiece 40 to be measured, in the embodiment, workpiece 40 to be measured is aluminum pipe fixing base, and aluminum pipe fixing base is applied to grass trimmer, is installed on the motor of grass trimmer when using, and is connected with motor by sleeving cutting rod.

[0036] With reference to Figure 2 , Figure 3 , Figure 4 First inner hole 402 and second inner hole 403 are different in diameter, and first inner hole 402 and second inner hole 403 need to be concentric in normal working use of workpiece 40 to be measured, the inspection tool 100 is used to detect the concentricity of first inner hole 402 and second inner hole 403, and the material of workpiece 40 to be measured is generally made of aluminum.

[0037] With reference to Figure 5 , Figure 6 , Figure 7 Positioning portion 101 is cylindrical boss, and the outer wall diameter of positioning portion 101 is same with the inner wall diameter of second inner hole 403 of workpiece 40 to be measured, it needs to be explained that there is the difference of tolerance between second inner hole 403 and positioning portion 101, thus, second inner hole 403 and positioning portion 101 can be mutually sleeved, and the outer wall of positioning portion 101 is coincident with the inner wall of second inner hole 403 when workpiece 40 to be measured is sleeved on positioning portion 101.

[0038] Further, first through hole 102 is provided on positioning block 10, first through hole 102 penetrates from positioning portion 101 to the lower end surface of positioning block 10, simultaneously, first through hole 102 forms first center line 103 on the center line of positioning portion 101 upper end surface and the center line of positioning block 10 lower end surface, in addition, the center line of inner hole 401 of upper and lower end surfaces of workpiece 40 to be measured forms second center line 404, when inner hole 401 of workpiece 40 to be measured is concentric, first center line 103 and second center line 404 coincide.

[0039] With reference to Figure 5 , Figure 7 , Figure 8The base 20 comprises a bottom plate 201 and a support leg 202. The second through hole 203 is provided on the bottom plate 201 and penetrates the upper end face and the lower end face of the bottom plate 201. The second through hole 203 is connected to the centers of the upper end face and the lower end face of the bottom plate 201 to form a third center line 204. In this embodiment, the diameter of the second through hole 203 is greater than the diameter of the first through hole 102. In other embodiments, the diameter of the second through hole 203 can also be not greater than the diameter of the first through hole 102, as long as the first through hole 102 is concentric with the second through hole 203 when the positioning block 10 is installed on the bottom plate 201, that is, the third center line 204 coincides with the first center line 103.

[0040] In addition, two first fixing holes 205 are provided on both sides of the second through hole 203 of the bottom plate 201, and two second fixing holes 104 are provided on the lower end face of the positioning block 10. The fixing member 206 fixes the positioning block 10 on the bottom plate 201 through the first fixing hole 205 and the second fixing hole 405. In this embodiment, the fixing member 206 is a screw, the first fixing hole 205 is configured as a threaded hole, and the corresponding second fixing hole 405 is configured as a threaded blind hole. The screw is tightened to fix the base 201 and the mounting block 10. The support leg 202 is provided at the four corners of the lower end face of the bottom plate 201 to support the bottom plate 201 and elevate it. When the sliding pin shaft 30 passes through the second through hole 203, it prevents the sliding pin shaft 30 from hitting the table below the base 20.

[0041] Referring to Figure 5 The sliding pin shaft 30 comprises a pin head 301 and a pin rod 302. The pin rod 302 comprises an upper rod 303 and a lower rod 304, which are concentric. In this embodiment, to ensure that the upper rod 303 and the lower rod 304 of the sliding pin shaft 30 are concentric, an integrated molding method is used during processing. The shaft diameter of the upper rod 303 is the same as the diameter of the first inner hole 402, and the shaft diameter of the lower rod 304 is the same as the diameter of the first through hole 102. The only difference between them is the tolerance. During assembly, the lower rod 304 can be tightly inserted into the first through hole 102. In addition, the length of the upper rod 303 is not greater than the length of the first inner hole 402, and the total length of the upper rod 303 and the lower rod 304 is at least greater than the total length of the first inner hole 402, the second inner hole 403, and the first through hole 102, so that the pin rod 302 has sufficient length to pass through the first through hole 102 when detecting the workpiece to be detected, and the lower end of the lower rod 304 can smoothly extend out of the bottom plate 201. In addition, the pin head 301 is provided above the upper rod 303. In this embodiment, the pin head 301 is a cylinder, and its diameter is greater than the diameter of the first inner hole 402. The shape of the pin head 301 can be diverse, as long as it can limit the length of the shaft body of the sliding pin shaft 30 extending into the workpiece to be detected 40 and the positioning block 10 during detection, to prevent the lower end of the lower rod 304 from extending too long and hitting the table below the base 20.

[0042] In actual application of the inspection tool 100, normally, the positioning block 10 is installed on the base 20 through the fixing member 206, and the lower rod 304 of the sliding pin shaft 30 is inserted into the first through hole 102 on the positioning block 10. Figure 6 , Figure 9 , Figure 10 When the concentricity of the workpiece 40 to be measured is detected, the sliding pin shaft 30 is pulled out, the workpiece 40 to be measured is positioned radially on the positioning portion 101 of the positioning block 10, and then the pin rod 302 of the sliding pin shaft 30 is inserted from the first inner hole 402 of the workpiece 40 to be measured. If the pin rod 302 can smoothly pass through the channel formed by the first inner hole 402, the second inner hole 403 and the first through hole 102, and finally the lower end surface of the lower rod 304 can smoothly pass through the second through hole 203 of the bottom plate 201, it is determined that the first inner hole 402 and the second inner hole 403 of the workpiece 40 to be measured are concentric. If the lower rod 304 of the sliding pin shaft 30 cannot pass through the first through hole 102 of the positioning block 10 or the second through hole 203 of the bottom plate, or is blocked when passing through the channel, it is determined that the first inner hole 402 and the second inner hole 403 of the workpiece 40 to be measured are not concentric. The detection operation is simple, the process is not complicated, and the judgment result is obvious and fast, which greatly improves the detection efficiency.

[0043] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An inspection tool adapted to detect concentricity of a workpiece under test, characterized by, The inspection tool comprises: a positioning block, which is provided with a first through hole penetrating through the upper and lower end faces of the positioning block; a sliding pin shaft cooperating with the positioning block for detecting the concentricity of the workpiece to be measured; wherein the workpiece to be measured is provided with a first inner hole and a second inner hole, and the upper end face of the positioning block is provided with a positioning portion, and when the concentricity of the workpiece to be measured is detected, the second inner hole of the workpiece to be measured is fitted with the positioning portion; the first inner hole, the second inner hole and the first through hole jointly form a channel, and the sliding pin shaft is a straight shaft; the shaft diameter of the sliding pin shaft is fitted with the channel, and when the lower end face of the sliding pin shaft can pass through the positioning block, the first inner hole and the second inner hole of the workpiece to be measured are concentric and qualified; if the lower end face of the sliding pin shaft cannot pass through the positioning block or is blocked when passing through the channel, the first inner hole and the second inner hole of the workpiece to be measured are not concentric and unqualified.

2. The inspection tool of claim 1, wherein, It also comprises a base, which comprises a bottom plate and a supporting leg mounted on the bottom plate, wherein the positioning block is fixedly connected with the bottom plate through a fixing member, and the bottom plate is provided with a second through hole penetrating through the upper and lower end faces of the bottom plate.

3. The inspection tool of claim 2, wherein, When the diameter of the second through hole is less than or equal to the diameter of the first through hole, the first through hole is concentric with the second through hole.

4. The inspection tool of claim 1, wherein, The sliding pin shaft comprises an upper rod and a lower rod, and the upper rod and the lower rod are concentric.

5. The inspection tool of claim 4, wherein, The diameter of the upper rod is less than or equal to the diameter of the first inner hole, and the diameter of the lower rod is less than or equal to the diameter of the first through hole.

6. The inspection tool of claim 4, wherein, The length of the upper rod is less than or equal to the length of the first inner hole, and the total length of the upper rod and the lower rod is greater than the total length of the first inner hole, the second inner hole, the first through hole and the second through hole.

7. The inspection tool of claim 4, wherein, The sliding pin shaft further comprises a pin head mounted at one end of the upper rod.

8. The inspection tool of claim 2, wherein, The center line of the upper and lower end faces of the positioning block forms a first center line, the center line of the inner holes of the upper and lower end faces of the workpiece to be measured forms a second center line, and the center line of the upper and lower end faces of the bottom plate forms a third center line, and when the first inner hole and the second inner hole of the workpiece to be measured are concentric and qualified, the first center line, the second center line and the third center line coincide.

9. The inspection tool of claim 1, wherein, The workpiece to be measured is an aluminum pipe fixing seat.

10. The inspection tool of claim 4, wherein, The upper rod and the lower rod are integrally formed.

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