Crankshaft thrust part angle testing fixture

Abstract

The utility model discloses a crankshaft thrust part angle testing fixture, which comprises a base, the base is provided with a support for supporting a crankshaft, the base is also provided with a first testing fixture for supporting the crankshaft and measuring a first detection surface of a crankshaft thrust part, the first testing fixture is provided with a fixed measuring piece, the first testing fixture is internally provided with a movable rotating part, and the fixed measuring piece is provided with a fixed measuring piece. A movable measurer is arranged on the rotating part; the beneficial effects of the utility model are that through the arrangement of the fixed measurer and the movable measurer, during measurement, the crankshaft is pushed to move towards the measurer until the first detection surface is in contact with the movable measurer, the crankshaft is continuously pushed, and in the process, the movable measurer drives the rotating part to rotate until the first detection surface is in contact with the fixed measurer; and at the moment, the position of the rotating part is measured and output through the air nozzle, so that the angle of the first detection surface can be obtained, and the measuring efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of crankshaft detection, in particular to a crankshaft thrust part angle detection tool. Background Art

[0002] The crankshaft is a common component in the machining field. The crankshaft is generally provided with a thrust part (similar to the shoulder of the shaft), which has many functions such as bearing thrust and positioning. The angle of the thrust part is one of the key dimensions to ensure the normal operation of the equipment. Therefore, before assembling the finished equipment, it is necessary to detect the angle of the thrust part. At present, there are three main methods for measuring the angle of the thrust part of various crankshafts: 1. The three-coordinate point measurement method is used for measurement. This measurement method can measure the angle of the crankshaft thrust surface, but the measurement time is too long and the efficiency is too low. 2. The combination of a height gauge and a digital display is used for measurement. This measurement method can measure the angle of the crankshaft thrust surface, but the detection efficiency is very low, and the accuracy of the detection result depends more on the proficiency of the operator. 3. The thrust surface angle of the crankshaft is measured by a spring-type pneumatic measurement method. After calibration with standard parts, the workpiece is placed in the measuring device. At this time, the thrust surface of the workpiece contacts the fixed measuring point and the active measuring point. The angle between the fixed measuring point and the active measuring point is 90 degrees. The radius difference between the pitch circle of the fixed measuring point and the active measuring point is 1.5mm. The active measuring point is an elastic measuring unit made of 65mm. The air nozzle is designed behind the elastic measuring unit to measure the position difference between the active measuring point and the fixed measuring point, so as to obtain the thrust surface angle measurement value; the fixed measuring point and the active measuring point of this measurement method are not in a straight line, with a 90-degree angle, and the elasticity of the elastic measuring unit weakens after a certain number of uses, which will affect the measurement accuracy. The production site lacks fast, accurate, economical and durable special equipment to detect this parameter.

[0003] The patent with announcement number "CN202024707U" discloses a "coaxial and different-diameter shoulder detection device", which includes a standard plane table, a height micrometer, a height block gauge, and a detection base. The height dimension of the height block gauge is equal to the standard dimension of the two shoulders of the workpiece to be measured. The detection base is in the shape of a shaft sleeve, and the center hole of the detection base is larger than the diameter of the adjacent step shaft of the large-diameter shoulder of the workpiece to be measured. The height of the detection base is larger than the distance between the lower end face of the large-diameter shoulder of the workpiece to be measured and the bottom end face of the workpiece shaft, and the upper and lower planes of the detection base are parallel to each other. Although it realizes the measurement of the shoulder size, during the measurement process, it is also necessary to "turn off the height micrometer measuring head and remove the height block gauge, insert the lower step shaft of the large-diameter shoulder of the workpiece to be measured into the central hole of the detection base and place it flat, and then turn the height micrometer measuring head so that the ball head of the measuring head is close to the upper end face of the small-diameter shoulder". The process is relatively cumbersome and inefficient.

[0004] Therefore, our company proposes the crankshaft thrust part angle inspection fixture. Summary of the invention

[0005] The utility model aims to provide a crankshaft thrust portion angle detection tool, which can realize rapid detection of the thrust portion angle.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The crankshaft thrust part angle gauge comprises a base, a support for supporting the crankshaft is arranged on the base, a first gauge for supporting the crankshaft and measuring a first detection surface of the crankshaft thrust part is also arranged on the base, a fixed gauge is arranged on the first gauge, a movable rotating part is arranged inside the first gauge, a movable gauge is arranged on the rotating part, a distance between the movable gauge and the first detection surface of the rotating part when the rotating part is not subjected to force is smaller than a distance between the fixed gauge and the first detection surface, and an air nozzle for detecting the position of the rotating part is also arranged on the base.

[0008] Preferably, the rotating part and the first inspection fixture are provided with through holes for passing the rotating shaft, fixing bolts are provided at both ends of the rotating shaft, the side wall of the through hole of the rotating part is also provided with an open groove for passing the rotating shaft, and the rotating part is also provided with a locking hole for clamping the open groove to hold the rotating shaft.

[0009] Preferably, the gas nozzle is installed in a first inspection fixture, a limiting hole is provided in the first inspection fixture, and a limiting rod is provided in the limiting hole to prevent the rotating part from contacting the gas nozzle.

[0010] Preferably, the limiting holes and the limiting rods are provided at two locations in the first inspection fixture.

[0011] Preferably, an air pipe is installed on the base, and an air inlet connecting the air pipe and the air nozzle is opened on the base.

[0012] Preferably, a second gauge for measuring a second detection surface of the crankshaft thrust portion is also provided on the base, and the structure of the second gauge is consistent with that of the first gauge.

[0013] The beneficial effects of the utility model are:

[0014] 1. Through the setting of fixed and movable probes, during measurement, the crankshaft is first pushed toward the probe until the first detection surface contacts the movable probe, and the crankshaft is continued to be pushed. During this process, the movable probe drives the rotating part to rotate until the first detection surface contacts the fixed probe and the crankshaft can no longer be pushed. At this time, the position of the rotating part is measured and output by the air nozzle, and the angle of the first detection surface can be obtained, which has the advantage of high measurement efficiency.

[0015] 2. A second inspection fixture is also provided on the base. After the first inspection surface is measured, the crankshaft is pushed in the reverse direction to realize the measurement of the second inspection surface. The crankshaft workpiece only needs to be transported once to realize the measurement of its two inspection surfaces, which further improves the inspection efficiency.

[0016] 3. The setting of the limit hole and the limit rod can effectively protect the air nozzle and prevent it from being damaged due to accidental contact with the rotating part. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 A three-dimensional diagram of the present invention from another angle;

[0019] Figure 3 It is a top view of the utility model (removing the crankshaft and the second inspection fixture);

[0020] Figure 4 It is a cross-sectional view of the utility model (without the crankshaft);

[0021] Figure 5 for Figure 4 A partial enlarged view of FIG.

[0022] Figure 6 for Figure 4 Partial enlarged view II.

[0023] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings.

[0025] Embodiment 1

[0026] like Figure 1 , Figure 2 and Figure 5 As shown, the crankshaft thrust portion angle gauge of this embodiment includes a base 1, a support 4 for supporting a crankshaft 5 is provided on the base 1, a first gauge 7 for supporting the crankshaft 5 and measuring a first detection surface 61 of the thrust portion 6 of the crankshaft 5 is also provided on the base 1, a V-shaped groove for supporting the crankshaft 5 is provided above the support 4 and the first gauge 7, a fixed gauge 78 is provided on the first gauge 7, a movable rotating portion 71 is provided in the first gauge 7, a movable gauge 79 is provided on the rotating portion 71, and a distance between the movable gauge 79 and the first detection surface 61 of the rotating portion 71 when the rotating portion 71 is not subjected to force is less than a distance between the fixed gauge 78 and the first detection surface 61, and an air nozzle 77 for detecting the position of the rotating portion 71 is also provided on the base 1.

[0027] During inspection, the crankshaft 5 is first placed on the support 4 and the first inspection fixture 7, and then the crankshaft 5 is pushed to the left. The first inspection surface 61 first contacts the movable probe 79, and the crankshaft 5 continues to be pushed. During this process, the movable probe 79 drives the rotating part 71 to rotate until the first inspection surface 61 contacts the fixed probe 78 and the crankshaft 5 can no longer be pushed. At this time, the position of the rotating part 71 is measured and output by the air nozzle 77, so that the moving distance of the movable probe 79 can be measured, and then the angle of the first inspection surface 61 can be obtained.

[0028] like Figure 3 , Figure 4 and Figure 6 As shown, through holes for passing the rotating shaft are provided on the rotating part 71 and the first inspection fixture 7, and fixing bolts 73 are provided at both ends of the rotating shaft to prevent the rotating shaft from slipping out of the first inspection fixture 7. The side wall of the through hole of the rotating part 71 is also provided with an opening groove 74 for passing the rotating shaft, and the rotating part 7 is also provided with a locking hole 72 for clamping the opening groove 74 to hold the rotating shaft. When installing the rotating shaft, the locking bolt in the locking hole 72 is first taken out so that the rotating shaft can be passed through the through holes on the rotating part 71 and the first inspection fixture 7 and installed. Then, in order to lock the rotating shaft and the rotating part 71 as one, the bolt is screwed into the locking hole 72, so that the rotating shaft and the rotating part 71 can be fixed as one. After the first detection surface 61 contacts the movable measuring element 79, when the crankshaft 5 continues to move to the left, the rotating shaft and the rotating part 71 can rotate relative to the first inspection fixture 7 as a whole.

[0029] The air nozzle 77 is installed in the first inspection fixture 7. A limiting hole 75 is provided in the first inspection fixture 7. A limiting rod 76 is provided in the limiting hole 75 to prevent the rotating part 71 from contacting the air nozzle 77. The limiting hole 75 and the limiting rod 76 are provided at two locations in the first inspection fixture 7. Since the air nozzle 77 is a precision component and is relatively fragile, in order to prevent the rotating part 71 from accidentally rubbing against it when rotating, causing damage to the air nozzle 77, a limiting rod 76 is provided to limit the rotating part 71. The distance that the limiting rod 76 protrudes from the first inspection fixture 7 is precisely calculated. When the rotating part 71 swings clockwise and is about to contact the air nozzle 77, it will contact the limiting rod 76 in advance, thereby ensuring the moving distance of the rotating part 71, so as to detect the angle of the thrust part, and at the same time, form a reliable protection for the air nozzle 77.

[0030] An air pipe 2 is installed on the base 1 , and an air inlet 3 connecting the air pipe 2 and the air nozzle 77 is opened on the base 1 , and air is supplied to the air nozzle 77 through the air pipe 2 .

[0031] The base 1 is also provided with a second inspection fixture 8 for measuring the second inspection surface 62 of the crankshaft thrust portion. The crankshaft 5 can be inspected on both inspection surfaces by taking and placing the crankshaft 5 once, which greatly improves the inspection efficiency. When the second inspection fixture 8 is installed, the bottom surface of the crankshaft 5 does not contact the second inspection fixture 8, but is only supported on the support 4 and the first inspection fixture 7.

[0032] The structure of the second gauge 8 is consistent with that of the first gauge 7, and the distances of the various parts are arranged relative to those of the first gauge 7. For example, when the rotating part of the second gauge 8 is not subjected to force, the movable gauge is positioned slightly to the left of the fixed gauge, that is, the distance between the movable gauge and the second detection surface 62 is shorter than the distance between the fixed gauge and the second detection surface 62. The structures of the remaining components, such as the rotating part, the rotating shaft, the locking hole, the limiting rod, etc., are consistent with those of the first gauge 7.

[0033] When using this embodiment, first place the standard crankshaft 5 workpiece on the base 1, first push the crankshaft 5 to the left / or right, and detect the angle of the first detection surface 61 / or the second detection surface 62, then push the crankshaft 5 to the right / or left, and detect the angle of the second detection surface 62 / or the first detection surface 61, and take the angle measured this time as the standard value. Then take off the standard sample, put the crankshaft 5 to be tested on the base, and detect its two detection surfaces. The parts that meet the requirements are qualified, and those that do not meet the requirements are defective. Through this inspection fixture, not only the inspection efficiency of a single detection surface is improved, but also through the setting of two inspection fixtures, one-time assembly and double-sided measurement are achieved, thereby greatly improving the inspection efficiency.

[0034] This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model are within the protection scope of the technical solution of the utility model.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0036] If the words "first", "second" and so on are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the utility model and simplifying the description. Unless otherwise stated, the above words have no special meaning.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A crankshaft thrust angle gauge, comprising a base, on which a support for supporting the crankshaft is arranged, characterized in that: The base is also provided with a first gauge for supporting the crankshaft and measuring the first detection surface of the crankshaft thrust portion, the first gauge is provided with a fixed probe, a movable rotating portion is provided inside the first gauge, a movable probe is provided on the rotating portion, and when the rotating portion is not subjected to force, the distance between the movable probe and the first detection surface is smaller than the distance between the fixed probe and the first detection surface, and the base is also provided with an air nozzle for detecting the position of the rotating portion.

2. The crankshaft thrust portion angle gauge according to claim 1, characterized in that: The rotating part and the first inspection fixture are provided with through holes for passing the rotating shaft, fixing bolts are provided at both ends of the rotating shaft, the side wall of the through hole of the rotating part is also provided with an opening groove for passing the rotating shaft, and the rotating part is also provided with a locking hole for clamping the opening groove to hold the rotating shaft.

3. The crankshaft thrust portion angle gauge according to claim 1, characterized in that: The air nozzle is installed in a first inspection fixture, a limiting hole is provided in the first inspection fixture, and a limiting rod is provided in the limiting hole to prevent the rotating part from contacting the air nozzle.

4. The crankshaft thrust portion angle gauge according to claim 3, characterized in that: The limiting holes and the limiting rods are arranged at two locations in the first inspection tool.

5. The crankshaft thrust portion angle gauge according to claim 1, characterized in that: An air delivery pipe is installed on the base, and an air inlet connecting the air delivery pipe and the air nozzle is opened on the base.

6. The crankshaft thrust portion angle gauge according to claim 1, characterized in that: The base is also provided with a second gauge for measuring a second detection surface of the crankshaft thrust portion, and the structure of the second gauge is consistent with that of the first gauge.

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