Crankshaft symmetry degree detection device

Abstract

The utility model provides a crankshaft symmetry degree detection device. The crankshaft symmetry degree detection device comprises a base, a positioning part, a supporting part and a detection part, a transverse positioning slide rail is arranged on the side surface of the positioning part and is matched with the chute, so that the crankshaft can slide along the positioning slide rail; the two supporting parts are located on the left side and the right side of the front portion of the positioning sliding rail and are symmetrical relative to the symmetrical center face in the track direction of the positioning sliding rail. The supporting part can support the shaft part of the crankshaft when the crankshaft slides along the positioning sliding rail; the detection part is positioned above the positioning slide rail and can obtain a measurement reading corresponding to the highest point of the upper surface of the shaft part when the crankshaft passes through in a sliding manner; therefore, the symmetry degree detection of the crankshaft can be realized, the operation is simple and convenient, the detection efficiency can be improved, and the detection cost can be reduced; furthermore, the height of the positioning component and / or the supporting component can be adjusted, and the universality is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to machining and measurement technical field especially, relates to a crankshaft symmetry degree detection device. BACKGROUND

[0002] In modern industrial production, the crankshaft is a very common and important mechanical part, which is mainly used for converting reciprocating motion into rotary motion, or conversely converting rotary motion into reciprocating motion, so as to realize mechanical transmission in the system. The crankshaft is widely used, and the application fields include aerospace field, automobile industry field, refrigeration equipment field and the like, and it plays a vital role in the internal combustion engine, engine and compressor of numerous mechanical equipment, and the design and manufacturing quality of the crankshaft directly affects the performance and efficiency of the whole system.

[0003] Taking the refrigeration equipment field as an example, the crankshaft is a key part in the air conditioner compressor, which is mainly used for transmitting power and cooperating with the connecting rod to form a crankshaft connecting rod mechanism, so as to convert the rotary motion of the prime mover into the reciprocating motion of the piston, therefore, the precision of the crankshaft will directly affect the performance of the air conditioner compressor. The symmetry degree of the crankshaft is an important index of the precision of the crankshaft, and good symmetry degree can reduce unbalanced torque, reduce noise and vibration, uniformly distribute load, prolong the service life of parts, and ensure the stability of the system, which will directly affect the working performance, efficiency and service life of the compressor, therefore, in the processing and production of the air conditioner compressor crankshaft, the symmetry degree of the crankshaft needs to be detected.

[0004] In batch production, the symmetry degree detection work of the air conditioner compressor crankshaft is very large. At present, the symmetry degree of the crankshaft is generally detected by three coordinates or a projector, but this detection method has problems such as complicated detection steps, long detection time, low detection efficiency, high time cost, and high equipment cost of three coordinates or a projector itself, so it is not suitable for use in batch production of air conditioner compressor crankshafts. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of crankshaft symmetry degree detection device, it is easy to operate and convenient, can improve detection efficiency, reduce detection cost.Specific technical solutions are as follows:

[0006] A kind of crankshaft symmetry degree detection device is used for the symmetry degree detection of crankshaft, the crankshaft includes shaft portion and the inclined slot in the middle of the tail end of the shaft portion, including base and the positioning component on the base, support component and detection component;

[0007] The lateral surface of the positioning component is provided with transverse positioning slide rail, the positioning slide rail is adapted to the inclined slot, so that the crankshaft can slide along the positioning slide rail;

[0008] The number of the support components is two, which are located on the left and right sides in front of the positioning slide rail and are symmetrically opposite to the center of the positioning slide rail track direction; the support components can support the shaft part of the crankshaft when the crankshaft slides along the positioning slide rail;

[0009] The detection component is located above the positioning slide rail and can obtain the measurement reading corresponding to the highest point of the upper surface of the shaft part when the crankshaft slides.

[0010] Further, the height of the positioning slide rail can be adjusted.

[0011] Further, the positioning component is detachably installed between the base and the detection component.

[0012] Further, the positioning component is provided with a height adjusting component for adjusting the height of the positioning slide rail.

[0013] Further, the height of the support component can be adjusted.

[0014] Further, the support component is detachably installed on the base.

[0015] Further, the upper surface of the support component is a convex arc surface.

[0016] Further, the surface of the positioning slide rail and / or the support component is made of an alloy material.

[0017] Further, the left and right sides of the positioning slide rail are provided with chamfers.

[0018] Further, the detection component is a dial gauge, and the measuring rod of the dial gauge is perpendicular to the positioning slide rail.

[0019] The crankshaft symmetry detection device provided by the utility model has the following beneficial effects through the cooperation of the positioning component, the support component and the detection component: (1) the symmetry of the crankshaft can be detected, the detection precision is high, and the quality consistency in the production and processing process of the crankshaft can be controlled; (2) the operation is simple and convenient, the detection speed can be improved, the detection time can be reduced, and the detection efficiency can be improved; (3) the structure is simple, and the cost of the detection device can be reduced.

[0020] Further, the height of the positioning component and / or the support component can be adjusted, so that the symmetry of crankshafts of different specifications and different models can be detected, the universality of the crankshaft symmetry detection device is higher, and the applicability is better. DRAWINGS

[0021] Figure 1 The structure of the crankshaft of the air conditioner compressor is shown in the schematic view.

[0022] Figure 2 It is a structure schematic view of the crankshaft symmetry detection device.

[0023] Figure 3 It is a structure schematic view of the positioning component.

[0024] Figure 4 It is a structure schematic view of the crankshaft symmetry detection device in use. Figure 1 .

[0025] Figure 5 It is Figure 4 It is a partial enlarged view of position A in the middle.

[0026] Figure 6 It is a structure schematic view of the crankshaft symmetry detection device in use. Figure 2 .

[0027] Figure 7 It is a structure schematic view of the crankshaft symmetry detection device in use. Figure 3 .

[0028] The reference signs are as follows: 1 is a crankshaft, 11 is a shaft part, 12 is an inclined groove, 2 is a base, 3 is a positioning component, 31 is a positioning slide rail, 4 is a supporting component, 5 is a detection component, 51 is a dial gauge, and 52 is a measuring rod. DETAILED DESCRIPTION

[0029] The specific embodiments of the utility model will be further described below in combination with the drawings. In order to facilitate the description, the terms "front", "back", "positive", "negative", "left", "right", "top", "bottom", "up", "down", "inner", "outer", "inside" and the like in the utility model indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model and the actual orientation of the product or device in the process of production, use, sale and the like. In addition, in the embodiments of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "comprising" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be directly connected, or can be indirectly connected through an intermediate medium. For ordinary skilled persons in the art, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0030] The utility model provides a kind of crankshaft symmetry detection device, which can be used for the symmetry detection of air conditioner compressor crankshaft, in the embodiment, the air conditioner compressor crankshaft is arranged in the form of "L", and the symmetry detection device is arranged on the inclined groove of the crankshaft, and the symmetry detection device is used to detect the symmetry of the crankshaft. Figure 1The crankshaft 1 structure shown as an example, the crankshaft 1 includes shaft 11 and the inclined groove 12, the inclined groove 12 is located in the tail end of the shaft 11 intermediate (in this patent, the inclined groove 12 is located in the tail end of the shaft 11 intermediate means that the center of symmetry of the inclined groove 12 coincides with the plane through the shaft 11 axis), specifically, the inclined groove 12 can pass through the center of the crankshaft 1, also can not pass through the center of the crankshaft 1; of course, the symmetry detection of other similar structure of crankshaft 1 can also be applicable, not limited here.

[0031] As shown in the figure, Figure 2 The crankshaft symmetry detection device includes base 2, positioning component 3, support component 4 and detection component 5, wherein the positioning component 3, support component 4 and detection component 5 are all set on the base 2, specifically:

[0032] As shown in the figure, Figure 3 The side of the positioning component 3 is provided with transverse (in this patent, the transverse direction means the direction parallel to the horizontal plane) positioning slide rail 31, the positioning slide rail 31 can be integrally provided on the side of the positioning component 3, or can be detachably mounted on the side of the positioning component 3, not limited here; the positioning slide rail 31 is adapted to the inclined groove 12, so that the positioning slide rail 31 can be clamped into the inclined groove 12, so that the crankshaft 1 can slide along the positioning slide rail 31;

[0033] The number of support components 4 is two, specifically as shown in the figure, Figure 2 The two support components 4 are both set in front of the positioning slide rail 31, respectively located on the left and right sides of the positioning slide rail 31, and the two support components 4 are symmetrical relative to the center of symmetry of the track direction of the positioning slide rail 31; when the crankshaft 1 slides transversely along the positioning slide rail 31, the support component 4 can support the shaft 11 of the crankshaft 1, so that the crankshaft 1 is parallel to the horizontal plane;

[0034] The detection component 5 is installed on the positioning component 3 and located above the positioning slide rail 31, when the crankshaft 1 slides transversely on the positioning slide rail 31 and passes through the detection component 5, the detection component 5 can detect the measurement reading corresponding to the highest point of the upper surface of the shaft 11 of the crankshaft 1.

[0035] As shown in the embodiment, the detecting component 5 can be a dial gauge 51, and a measuring rod 52 is arranged on the dial gauge 51 and is perpendicular to the positioning slide rail 31. When testing, the dial gauge 51 is first calibrated so that the measuring rod 52 is in an initial position in a free state, and then a pointer points to a certain initial reading on a dial plate. Then, the crankshaft 1 is placed on the supporting component 4, and the positioning slide rail 31 is clamped into the inclined groove 12 of the crankshaft 1, and then the crankshaft 1 is moved laterally so that the crankshaft 1 slides along the positioning slide rail 31 and passes through the measuring rod 52. The lowest point of the upper surface of the crankshaft 1 starts to contact the measuring rod 52, and as the crankshaft 1 slides laterally, the measuring rod 52 gradually rises due to the circular arc surface, and the measuring rod 52 moves inward and is pressed into the body of the dial gauge 51. This displacement is converted into the rotary motion of the pointer through the internal mechanical structure. When the highest point of the upper surface of the crankshaft 1 contacts the measuring rod 52, the reading of the dial gauge 51 is the largest at this time, and the maximum reading is recorded at this time, which is the measurement reading corresponding to the highest point of the upper surface of the shaft part 11 of the crankshaft 1.

[0036] The specific detection steps of the crankshaft symmetry detection device are as follows: (1) first, as shown in Figure 4 、 Figure 5 , the crankshaft 1 is placed on the right supporting component 4, and the positioning slide rail 31 is clamped into the inclined groove 12 of the crankshaft 1, and then as shown in Figure 6 , the crankshaft 1 is moved to the right so that the crankshaft 1 slides along the positioning slide rail 31 and passes through the dial gauge 51. The measurement reading corresponding to the highest point of the upper surface of the shaft part 11 of the crankshaft 1 can be detected through the dial gauge 51, and the reading A of the dial gauge 51 is recorded at this time; (2) then, the crankshaft 1 is removed, and the crankshaft 1 is placed on the left supporting component 4 after being turned upside down. According to the same method, the value of the highest point of the upper surface of the shaft part 11 of the crankshaft 1 at this time is tested, and the reading B of the dial gauge 51 is recorded at this time; (3) finally, the reading A is subtracted from the reading B, and the symmetry value of the crankshaft 1 is obtained.

[0037] Of course, the detection component 5 can also not be a dial gauge, but can be other detection components; for example, it can be a height measuring device, when the crankshaft 1 is moved to make the crankshaft 1 slide transversely along the positioning slide rail 31 and pass through the detection component 5, the height value of the highest point of the upper surface of the shaft part 11 of the crankshaft 1 is detected, then the crankshaft 1 is removed, the crankshaft 1 is placed upside down on the left support component 4, and the value of the highest point of the upper surface of the shaft part 11 of the crankshaft 1 at this time is tested in the same way, and the difference between the two measurement values can obtain the symmetry value of the crankshaft 1; or the detection component 5 can also be a distance measuring device, when the crankshaft 1 is moved to make the crankshaft 1 slide transversely along the positioning slide rail 31 and pass through the detection component 5, the distance value between the highest point of the upper surface of the shaft part 11 of the crankshaft 1 and the detection component 5 is detected, then the crankshaft 1 is removed, the crankshaft 1 is placed upside down on the left support component 4, and the distance value between the highest point of the upper surface of the shaft part 11 of the crankshaft 1 and the detection component 5 at this time is tested in the same way, and the difference between the two measurement values can obtain the symmetry value of the crankshaft 1; therefore, the detection component 5 can be of various types, as long as the symmetry value of the crankshaft 1 can be obtained by comparing the two measurement readings of the highest point of the upper surface of the shaft part 11 (the first time is the upper surface, and the second time is actually the lower surface).

[0038] The crankshaft symmetry detection device with the above structure has the following beneficial effects through the cooperation of the positioning component 3, the support component 4 and the detection component 5: (1) the symmetry of the crankshaft 1 can be detected, and the detection precision is high, which is conducive to the quality consistency control in the production and processing process of the crankshaft 1; (2) the operation is simple and convenient, the detection speed can be improved, the detection time can be reduced, and the detection efficiency can be improved; (3) the structure is simple, and the cost of the detection device can be reduced.

[0039] In some embodiments, the height of the positioning slide rail 31 can be adjusted, so that the height of the positioning slide rail 31 can be adjusted according to the specific radius of the crankshaft 1, so that the position of the positioning slide rail 31 is adapted to the inclined groove 12 of the crankshaft 1, and then the crankshaft symmetry detection device can be applied to the symmetry detection of crankshafts 1 of different specifications and different models, so that the universality of the crankshaft symmetry detection device is higher, and the applicability is better.

[0040] In some embodiments, as shown in the present embodiment, the positioning slide rail 31 is integrally installed on the side of the positioning component 3, and the positioning component 3 is detachably installed between the base 2 and the detection component 5, so that the height adjustment of the positioning slide rail 31 can be realized by replacing positioning components 3 of different heights, which is simple and convenient.

[0041] In some embodiments, the positioning component 3 is provided with a height adjusting component for adjusting the height of the positioning slide rail 31, and the height of the positioning slide rail 31 is adjusted through the height adjusting component. For example, the positioning slide rail 31 is movably mounted on the side of the positioning component 3 through a longitudinal slide rail, and the height of the positioning slide rail 31 is adjusted by moving the position of the positioning slide rail 31 on the slide rail, which is more convenient and has better applicability.

[0042] In some embodiments, the height of the support component 4 is adjustable, so that the height of the support component 4 can be adjusted according to the specific radius of the crankshaft 1, so that the position of the inclined groove 12 of the crankshaft 1 is adapted to the position of the positioning slide rail 31, and then the crankshaft symmetry detection device can be applied to the symmetry detection of different specifications and different models of the crankshaft 1, so that the crankshaft symmetry detection device has higher universality and better applicability.

[0043] In some embodiments, the support component 4 is detachably mounted on the base 2, so that the height of the positioning slide rail 31 can be adjusted by replacing the support component 4 with different heights, which is simple in structure and convenient and fast. Of course, the height of the support component 4 can also be adjusted by providing a height adjusting component on the support component 4 for adjusting the height of the support component 4, which is not limited here.

[0044] In some embodiments, the upper surface of the support component 4 is a convex arc surface upward, so that the contact between the crankshaft 1 and the support component 4 is point contact, so that the contact area between the crankshaft 1 and the support component 4 can be reduced while supporting the crankshaft 1, the friction between the crankshaft 1 and the support component 4 is reduced, the crankshaft 1 is more easily slid, and the error in the measurement process can be reduced, and the surface of the crankshaft 1 is not easily scratched.

[0045] In some embodiments, the surfaces of the positioning slide rail 31 and the support component 4 are made of alloy material, which has high strength and high hardness and better wear resistance, can prolong the service life of the positioning slide rail 31 and the support component 4, and improve the reliability of the crankshaft symmetry detection device. Of course, only one of the surfaces of the positioning slide rail 31 and the support component 4 can be made of alloy material.

[0046] In some embodiments, the left and right sides of the positioning slide rail 31 are provided with chamfers, so as to prevent the operator from being cut by sharp edges, facilitate easier insertion of the crankshaft 1, prevent the sharp edges of the positioning slide rail 31 from scratching the crankshaft 1, and improve the reliability and safety of the crankshaft symmetry detection device.

[0047] The above embodiments are only preferred embodiments of the present application, and do not limit the scope of the present application, and equivalent changes made according to the shape, structure and principle of the present application should be covered in the protection scope of the present application.

Claims

1. A crankshaft symmetry detection device for detecting the symmetry of a crankshaft (1), the crankshaft (1) comprising a shaft portion (11) and a slanted groove (12) located at the middle of the tail end of the shaft portion (11), characterized in that, The base (2) and the positioning component (3), the supporting component (4) and the detecting component (5) on the base (2); The positioning component (3) is provided with a transverse positioning slide rail (31) on the side, which is adapted to the chute (12), so that the crankshaft (1) can slide along the positioning slide rail (31); The supporting component (4) is two in number, located on the left and right sides in front of the positioning slide rail (31), and is symmetrically faced with respect to the center of the track direction of the positioning slide rail (31); the supporting component (4) can support the shaft part (11) of the crankshaft (1) when the crankshaft (1) slides along the positioning slide rail (31); The detecting component (5) is located above the positioning slide rail (31), and can obtain the measurement reading corresponding to the highest point of the upper surface of the shaft part (11) when the crankshaft (1) slides through.

2. The crankshaft balance detection device according to claim 1, characterized by The height of the positioning slide rail (31) can be adjusted.

3. The crankshaft balance determination device according to claim 2, characterized by The positioning component (3) is detachably installed between the base (2) and the detecting component (5).

4. The crankshaft balance determination device according to claim 2, characterized by The positioning component (3) is provided with a height adjusting component for adjusting the height of the positioning slide rail (31).

5. The crankshaft balance determination device according to claim 1, characterized by The height of the supporting component (4) can be adjusted.

6. The crankshaft balance determination device according to claim 5, characterized by The supporting component (4) is detachably installed on the base (2).

7. The crankshaft symmetry detection device according to any one of claims 1 to 6, characterized by The upper surface of the supporting component (4) is a convex arc surface upward.

8. The crankshaft symmetry detection device according to any one of claims 1 to 6, characterized by The surface of the positioning slide rail (31) and / or the supporting component (4) is made of alloy material.

9. The crankshaft symmetry detection device according to any one of claims 1 to 6, characterized by The left and right sides of the positioning slide rail (31) are provided with chamfers.

10. The crankshaft symmetry detection device according to any one of claims 1 to 6, characterized by The detecting component (5) is a dial indicator (51), and the measuring rod (52) of the dial indicator (51) is perpendicular to the positioning slide rail (31).

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