Rapid crankshaft straightness sorting device

Abstract

The utility model discloses a rapid crankshaft straightness sorting device which comprises a measuring rod (2), a measuring support (3), a base (6) and a guide rail (7). The measuring support (3) is inverted-U-shaped, and the two ends of the measuring support (3) are fixedly installed on the base (6) through bolts (4). The two guide rails (7) are arranged below the measuring bracket (3) in parallel, and the top surfaces of the guide rails (7) are inclined surfaces; and the measuring rod (2) is obliquely arranged on the measuring bracket (3) and is parallel to the top surface of the guide rail (7). The crankshaft straightness sorting device can quickly sort whether the crankshaft straightness is qualified or not, is high in efficiency and is suitable for sorting large-batch products.

Description

Technical Field

[0001] The utility model belongs to the technical field of forging inspection tools, and in particular relates to a fast crankshaft straightness sorting device. Background Art

[0002] With the development of technology, the automotive industry has become more and more strict in cost control. As the core component of the engine, the crankshaft has higher and higher requirements for the margin and dimensional accuracy of the forging. Among them, the straightness of the crankshaft forging is too high, which will lead to insufficient crankshaft machining margin and product scrapping. Even in the crankshaft machining process, there are serious consequences such as damage to the tool, fixture, and even the machine tool. In view of the above reasons, people have also proposed some crankshaft straightness inspection tools.

[0003] For example, Chinese patent application No. 201820077569.1 discloses a crankshaft straightness quick inspection tool, including a bracket, the bracket including positioning plates respectively contacting the two ends of the crankshaft to be inspected, a detection block limit rod is arranged between the positioning plates, and the detection block limit rod is movably connected to the detection block; a dial indicator positioning rod is arranged between the positioning plates, and the dial indicator positioning rod is fixedly connected to the dial indicator; the detection block is provided with a push rod, and the end of the push rod is in contact with the push pin of the dial indicator. The positioning plate includes a lower part, and a V-shaped notch is arranged at the lower end of the lower part; the upper end of the lower part is connected to the upper part, and the width of the upper part is smaller than the width of the lower part. The detection block limit rods are respectively arranged on both sides of the upper end of the lower part of the positioning plate, and the surface of the detection block limit rod is smoothed. The lower end of the detection block is provided with a V-shaped notch, and long holes for moving along the radial direction of the detection block limit rod are arranged on both sides. The inspection tool has a simple structure, reasonable design, high working efficiency, can be operated by one person, and the inspection can be completed in one minute, and the conclusion is objective and reliable.

[0004] For another example, Chinese patent application No. 202321738129.3 discloses a straightness measuring device, which includes: two supports, the two supports are parallel and oppositely arranged to at least support the two ends of the shaft to be measured respectively; a detection frame, the detection frame can be placed above the shaft to be measured; a through hole is provided on the detection frame along the direction of gravity; a measuring table, the measuring table can be inserted into and out of the through hole along the direction of gravity, so that the measuring end of the measuring table can move against the outer surface of the shaft to be measured that is away from the ground; wherein, when the shaft to be measured reciprocates along the axial direction of the shaft to be measured between the two supports, the measuring table can detect the straightness of the shaft to be measured. Utility Model Content

[0005] The utility model aims to provide a fast crankshaft straightness sorting device which can quickly sort whether the crankshaft straightness is qualified.

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

[0007] A fast straightness sorting device for crankshafts, comprising: a measuring rod, a measuring bracket, a base and guide rails; the measuring bracket is in an inverted U shape and is fixedly installed on the base at both ends through bolts; there are two guide rails, which are arranged in parallel below the measuring bracket, and the top surface of the guide rail is an inclined surface; the measuring rod is inclined on the measuring bracket and is parallel to the top surface of the guide rail. The device further includes an adjusting spacer; the adjusting spacer is installed between the measuring bracket and the base.

[0008] In the present utility model, taking a four-cylinder crankshaft as an example, the first and fifth main journals of the crankshaft forging to be measured are supported by the guide rails as a reference. The guide rails are designed to be higher on the left and lower on the right, facilitating the rolling of the crankshaft forging to be measured on the guide rails by its own weight. A measuring rod is designed and fixed on the measuring bracket. The measuring rod is parallel to the supporting surface of the guide rail. By adjusting the thickness of the adjusting spacer, a suitable distance can be obtained between the measuring rod and the supporting surface of the guide rail, and the size of this distance is determined by the straightness tolerance of the crankshaft forging to be measured.

[0009] During measurement, first place the crankshaft forging to be measured at a higher position on the left side of the guide rail. Due to its own weight, the crankshaft forging to be measured starts to roll on the two parallel guide rails. When the crankshaft forging to be measured rolls into the range of the measuring rod, the movement space of the third main journal of the crankshaft forging is limited, and this movement space is determined by the distance between the measuring rod and the projection of the guide rail onto a plane perpendicular to the base and parallel to the guide rail. The design standard of this projected distance should be equal to the diameter of the main journal of this crankshaft plus 2 times the straightness tolerance. This projected distance can be changed by adjusting the thickness of the adjusting spacer.

[0010] When the crankshaft forging to be measured can normally pass through the limited space formed by the measuring rod and the guide rail of the sorting device, the straightness of this crankshaft forging is qualified. When the crankshaft forging to be measured cannot pass through the limited space formed by the measuring rod and the guide rail of the sorting device, there is a risk that the straightness of this crankshaft is unqualified and precise measurement is required.

[0011] As a further description of the present utility model, protrusions are provided at both ends of the top surface of the guide rail. The protrusions at both ends can prevent the crankshaft forging to be measured from slipping out of the guide rail when rolling on the guide rail.

[0012] As a further optimized solution of the present utility model, the device further includes a retractable digital display dial indicator; the measuring rod is fixed to the digital display dial indicator; the digital display dial indicator is fixed on the measuring bracket. At this time, when the crankshaft forging to be measured passes below the measuring rod, the straightness deviation of this crankshaft forging can be accurately measured through the digital display dial indicator.

[0013] As a further optimization solution of the present utility model, it further includes a displacement sensor; the measuring rod is installed on the measuring bracket through the displacement sensor. That is, on the basis of the above optimization solution, the digital display dial indicator is replaced with a displacement sensor; at the same time, an industrial robot is installed after the sorting device, and the data of the displacement sensor can be transmitted to the industrial robot to realize the automatic sorting of the straightness deviation of the crankshaft forging by the robot.

[0014] Compared with the prior art, the present utility model has the following beneficial effects:

[0015] 1. In the present utility model, the measured crankshaft forging can roll on the track of the guide rail by its own weight without additional rotational power.

[0016] 2. The sorting device of the present utility model can quickly sort out the materials with unqualified straightness without reading, with high efficiency and is suitable for sorting a large number of products.

[0017] 3. In the sorting device of the present utility model, during use, the measured crankshaft forging enters and exits at different positions and does not require power, which is convenient for realizing automatic feeding and discharging. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the present utility model.

[0019] Figure 2 It is a side view structural schematic diagram of an embodiment of the present utility model.

[0020] REFERENCE NUMERALS:

[0021] 1 - Measured crankshaft forging, 2 - Measuring rod, 3 - Measuring bracket, 4 - Bolt, 5 - Adjusting pad, 6 - Base, 7 - Guide rail. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present utility model will be further described below with reference to the drawings.

[0023] Embodiment 1: A fast crankshaft straightness sorting device, as shown in Figure 1 and Figure 2 includes: a measuring rod 2, a measuring bracket 3, an adjusting pad 5, a base 6 and a guide rail 7; the measuring bracket 3 is in an inverted U shape, and both ends are fixedly installed on the base 6 through bolts 4 and adjusting pads 5; there are two guide rails 7, which are arranged in parallel below the measuring bracket 3, and the top surface of the guide rail 7 is an inclined surface; the measuring rod 2 is inclined on the measuring bracket 3 and is parallel to the top surface of the guide rail 7.

[0024] This embodiment further illustrates that: both ends of the top surface of the guide rail 7 are provided with protrusions, which can prevent the measured crankshaft forging 1 from rolling out of the support surface of the guide rail 7.

[0025] Method of using the sorting device of this embodiment:

[0026] Taking a four-cylinder crankshaft as an example, the first and fifth main journals of the crankshaft forging 1 to be measured are supported by the guide rail 7 as a reference.

[0027] During measurement, first place the crankshaft forging 1 to be measured at a higher position on the left side of the guide rail 7. Due to its own weight, the crankshaft forging 1 to be measured starts to roll on the two parallel guide rails 7. When the crankshaft forging 1 to be measured rolls into the range of the measuring rod 2, the movement space of the third main journal of the crankshaft forging 1 is limited. This movement space is determined by the distance between the measuring rod 2 and the projection of the guide rail 7 on a plane perpendicular to the base 6 and parallel to the guide rail 7. The design standard of this projection distance should be equal to the main journal diameter of the crankshaft plus twice the straightness tolerance. This projection distance can be changed by adjusting the thickness of the spacer 5.

[0028] When the crankshaft forging 1 to be measured can normally pass through the restricted space formed by the measuring rod 2 and the guide rail 7 of the sorting device, the straightness of this crankshaft forging is qualified. When the crankshaft forging 1 to be measured cannot pass through the restricted space formed by the measuring rod 2 and the guide rail 7 of the sorting device, there is a risk that the straightness of this crankshaft is unqualified and precise measurement is required.

[0029] Embodiment 2: The difference between this embodiment and Embodiment 1 is only that: it further includes a retractable digital display dial indicator; the measuring rod 2 is fixed on the digital display dial indicator; the digital display dial indicator is fixed on the measuring bracket 3.

[0030] At this time, when the crankshaft forging 1 to be measured passes under the measuring rod 2, the straightness deviation of this crankshaft forging can be accurately measured by the digital display dial indicator.

[0031] Embodiment 3: The difference between this embodiment and Embodiment 1 is only that: it further includes a displacement sensor; the measuring rod 2 is installed on the measuring bracket 3 through the displacement sensor. This embodiment is based on the optimized solution of Embodiment 2, replacing the digital display dial indicator with a displacement sensor; at the same time, an industrial robot is installed after this sorting device, and the data of the displacement sensor can be transmitted to the industrial robot to realize automatic sorting of the straightness deviation of the crankshaft forging by the robot.

[0032] Obviously, the above embodiments are only examples for clearly explaining the present invention, rather than limitations on the implementation of the present invention. For those of ordinary skill in the art to which the present invention pertains, other different forms of changes or variations can be made based on the above description; it is not necessary and impossible to enumerate all implementation manners here; and the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A rapid straightness sorting device for crankshafts, characterized in that Including: A measuring rod (2), a measuring bracket (3), a base (6) and a guide rail (7); the measuring bracket (3) is in an inverted U shape, and both ends are fixedly installed on the base (6) through bolts (4); there are two guide rails (7), which are arranged in parallel below the measuring bracket (3), and the top surface of the guide rail (7) is an inclined surface; the measuring rod (2) is inclined and arranged on the measuring bracket (3) and is parallel to the top surface of the guide rail (7).

2. The rapid crankshaft straightness sorting device according to claim 1, characterized in that: It further includes an adjusting spacer (5); the adjusting spacer (5) is installed between the measuring bracket (3) and the base (6).

3. The quick crankshaft straightness sorting device according to claim 1, characterized in that: Both ends of the top surface of the guide rail (7) are provided with protrusions.

4. The rapid crankshaft straightness sorting device according to claim 1, wherein: It further includes a retractable digital display dial indicator; the measuring rod (2) is fixed to the digital display dial indicator; the digital display dial indicator is fixed on the measuring bracket (3).

5. The quick crankshaft straightness sorting device according to claim 1, characterized in that: It further includes a displacement sensor; the measuring rod (2) is installed on the measuring bracket (3) through the displacement sensor.

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