CN209802225U - A checking tool for measuring the position of a camshaft positioning pin - Google Patents

Abstract

The utility model discloses a detection tool for measuring the position of a camshaft positioning pin, which comprises a measuring body, a dial indicator and fastening bolts. The shape of the measuring body is a cylinder, and an arc is arranged on the end surface of the measuring body. Shaped waist groove, the middle position of the large arc top of the waist groove is provided with an installation through hole along the longitudinal direction, and a positioning through hole is opened on one end surface of the measurement body, and the positioning through hole is connected with the installation through hole. The holes are connected vertically, a dial indicator is arranged in the installation through hole, fastening bolts are arranged in the positioning through hole, a round hole is also opened on the end surface of the measuring body, and a The positioning sleeve, the end surface of the measuring body is provided with a scale ring along the track of the waist groove, and the front end of the dial gauge is provided with a measuring head, and the measuring head is in the shape of a rounded table. It not only greatly improves the measurement efficiency, is suitable for batch testing of products, but also can effectively guarantee product quality.

Description

A checking tool for measuring the position of a camshaft positioning pin

technical field

The utility model relates to a checking tool, in particular to a checking tool for measuring the position of a camshaft positioning pin.

Background technique

The positioning pin holes on the camshaft are used to ensure the relative position of the cams of each cylinder during assembly, so as to ensure the correct phase of each cam, that is, the firing sequence of each cylinder. Now the positioning pin hole of the camshaft is located on the end face of the large-diameter camshaft. In order to ensure the timing relationship between the timing gear and the camshaft, it is required to ensure that the pin hole of the gear and the positioning pin hole of the camshaft are on the same line during assembly. in a straight line. Therefore, the relative position and size of the locating pin that is pressed into the camshaft locating pin hole is particularly important, and the difference in access will directly cause the engine to fail to assemble.

At present, when measuring the position of the positioning pin, the vernier caliper is used for measurement, that is, the distance between the lowest end of the small-diameter camshaft on the same end surface as the positioning pin and the highest end of the positioning pin is measured with the vernier caliper, and then Subtracting the radius of the positioning pin and the radius of the small-diameter camshaft to obtain the center distance between the positioning pin and the camshaft not only has the disadvantages of complex measurement, high labor intensity and low measurement efficiency, it is not suitable for batch testing of products. Sampling inspections can be carried out, and the requirements for the environment and the level of operators are relatively high, so the product quality is difficult to control.

Utility model content

In view of the above problems, the problem to be solved by the utility model is to provide a simple and reasonable structure, low cost, easy measurement, good measurement stability and high measurement accuracy. , suitable for batch testing of products, and can effectively guarantee product quality.

In order to achieve the above purpose, the utility model adopts the following technical solutions: a checker for measuring the position of the camshaft positioning pin, including a measuring body, a dial indicator and a fastening bolt, the shape of the measuring body is a cylinder, and the measuring The end surface of the main body is provided with an arc-shaped waist groove, and the middle position of the large arc top of the waist groove is provided with an installation through hole along the longitudinal direction, and a positioning through hole is opened on one end surface of the measurement main body. The positioning through hole is vertically communicated with the installation through hole, the installation through hole is provided with a dial gauge, and the positioning through hole is provided with a fastening bolt, and the fastening bolt locates the dial gauge at the On the measuring main body, a round hole is also opened on the end face of the measuring main body, and a positioning sleeve is detachably installed in the round hole, the center line of the positioning sleeve, the center line of the waist groove and the round hole The centerlines are all on the same straight line, the end surface of the measuring main body is provided with a scale ring along the track of the waist groove, and the front end of the dial indicator is provided with a measuring head, and the measuring head is in the shape of a rounded table.

Preferably, the material of the measuring body is 45#, and the material of the positioning sleeve is Cr12.

The effective results of the utility model: the utility model is simple and reasonable in structure, low in cost, and the detachable setting of the positioning sleeve can meet the measurement of different types of camshafts, and optimize the positioning effect of the camshaft; because the positioning pin is a small cylindrical shape , that is, the measured point is an arc surface. If the original small ball head measuring head is used, a small size change of the positioning pin will cause a large fluctuation in the measuring point, which will further lead to measurement distortion. Therefore, the measuring head is set to be inverted. The shape of the circular platform, that is, the plane in contact with the positioning pin, can be aligned with the highest convex point on the arc surface of the positioning pin, further improving the stability and accuracy of the measurement, making the watch position more stable and the measurement more accurate; making the measurement of the dial gauge The head is aligned with the highest convex point of the arc surface of the positioning pin, which further improves the stability and accuracy of the measurement; the material of the measurement body is set to 45#, which improves the wear resistance and prolongs the service life. When in use, the dial gauge is first calibrated to zero with the camshaft standard block, and then the measuring body is sleeved on the camshaft, and the positioning sleeve is used for firm positioning. At this time, it is located on the end surface of the measuring body along the waist groove. There is a scale circle on the track, so as to ensure that the measuring head of the dial gauge is aligned with the highest convex point of the positioning pin arc surface, which greatly improves the stability and accuracy of the measurement. At this time, the staff visually inspect the dial gauge The reading is enough, if the reading is within the numerical range, it meets the requirements; otherwise, it does not meet the requirements. Not only is the measurement simple, but the measurement efficiency is greatly improved, it is suitable for batch testing of products, and it can effectively guarantee product quality.

In summary, the utility model has the characteristics of simple and reasonable structure, low cost, easy measurement, good measurement stability and high measurement accuracy, which not only greatly improves the measurement efficiency, is suitable for batch testing of products, but also can effectively ensure product quality .

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a structural schematic diagram of the camshaft standard block in the utility model.

In the figure: 1-measuring main body, 2-dial indicator, 3-fastening bolt, 4-waist groove, 5-round hole, 6-positioning sleeve, 7-installation through hole, 8-positioning through hole, 9-measurement Head, 10-scale circle, 11-camshaft, 12-locating pin, 13-camshaft standard block.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment.

As shown in Figure 1 and Figure 2, the utility model discloses a checker for measuring the position of the camshaft positioning pin, which includes a measuring body 1, a dial indicator 2 and a fastening bolt 3, and the shape of the measuring body 1 is a cylinder , and the end face of the measuring main body 1 is provided with an arc-shaped waist groove 4, and the middle position of the large arc top of the waist groove 4 is provided with an installation through hole 7 along the longitudinal direction, and a part of the measuring main body 1 A positioning through hole 8 is provided on the end face, and the positioning through hole 8 is vertically communicated with the installation through hole 7. A dial gauge 2 is provided in the installation through hole 7, and a fastening device is provided in the positioning through hole 8. Bolts 3, the fastening bolts 3 position the dial indicator 2 on the measuring body 1, and a round hole 5 is provided on the end surface of the measuring body 1, and the round hole 5 is detachably installed with Positioning sleeve 6, the center line of the positioning sleeve 6, the center line of the waist groove 4 and the center line of the circular hole 5 are all on the same straight line, and the end surface of the measuring body 1 is aligned along the waist groove 4 A scale ring 10 is provided on the track of the dial gauge 2, and a measuring head 9 is provided at the front end of the dial gauge 2, the measuring head 9 is in the shape of a rounded table, the material of the measuring body 1 is 45#, and the positioning sleeve 6 is Material Cr12.

The utility model has simple and reasonable structure, low cost, and the detachable setting of the positioning sleeve 6 can meet the measurement of different types of camshafts 11, and the positioning effect of the camshaft 11 is optimized; since the positioning pin 12 is a small cylindrical shape, it is The measuring point is an arc surface. If the measuring head 9 with the original small ball head is used, a small size change of the positioning pin 12 will cause a large fluctuation in the measuring point, which will further lead to measurement distortion. Therefore, the measuring head 9 is set to be inverted. The shape of a circular platform, that is, the plane in contact with the positioning pin 12, can be aligned with the highest convex point of the arc surface of the positioning pin 12, further improving the stability and accuracy of the measurement, making the watch position more stable and the measurement more accurate; The measuring head 9 of 2 is aligned with the highest convex point of the arc surface of the positioning pin 12, further improving the stability and accuracy of the measurement; the material of the measuring main body 1 is set to 45#, which improves the wear resistance and prolongs the service life. When in use, first cooperate with the camshaft standard block 13 to carry out the zero-degree calibration of the dial gauge 2, then set the measuring body 1 on the camshaft 11, and use the positioning sleeve 6 to perform firm positioning. The scale circle 10 provided on the track along the waist groove 4 ensures that the measuring head 9 of the dial indicator 2 is aligned with the highest convex point of the arc surface of the positioning pin 12, greatly improving the stability and accuracy of the measurement. At this time, the staff can visually read the dial indicator 2. If the reading is within the numerical range, it meets the requirements; otherwise, it does not meet the requirements. Not only is the measurement simple, but the measurement efficiency is greatly improved, it is suitable for batch testing of products, and it can effectively guarantee product quality.

Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

Claims (2)

1. A checker for measuring the position of a camshaft positioning pin, comprising a measuring body (1), a dial indicator (2) and a fastening bolt (3), characterized in that: the shape of the measuring body (1) is a cylinder , and the end surface of the measuring body (1) is provided with a circular arc-shaped waist groove (4), and the middle position of the large arc top of the waist groove (4) is provided with a mounting through hole (7) in the longitudinal direction , one end surface of the measuring body (1) is provided with a positioning through hole (8), and the positioning through hole (8) is vertically communicated with the installation through hole (7), and in the installation through hole (7) A dial gauge (2) is provided, and fastening bolts (3) are arranged in the positioning through hole (8), and the fastening bolts (3) position the dial gauge (2) on the measuring body (1), the end face of the measuring body (1) is also provided with a circular hole (5), and a positioning sleeve (6) is detachably installed in the circular hole (5), and the positioning sleeve (6) The center line, the center line of the waist groove (4) and the center line of the circular hole (5) are all on the same straight line, and the end surface of the measuring body (1) follows the track of the waist groove (4) A scale ring (10) is arranged on the top, and a measuring head (9) is arranged at the front end of the dial indicator (2), and the measuring head (9) is in the shape of a rounded table. 2. The inspection tool for measuring the position of camshaft positioning pins according to claim 1, characterized in that: the material of the measuring body (1) is 45#, and the material of the positioning sleeve (6) is Cr12.