Main bearing bush interference measuring device

Abstract

The application provides a main bearing bushing interference amount measuring device, which comprises a template base, a template cavity for placing the main bearing bushing, and first and second reference surfaces arranged on both sides of the top of the template cavity; a pressing assembly fixedly arranged on the first reference surface, which is used for positioning the first end surface of the main bearing bushing; a limiting force applying assembly fixedly connected to the template base and arranged on the second reference surface, which comprises a limiting assembly and a force applying piece, the limiting assembly is fixedly connected to the template base and arranged on the second reference surface, and the force applying piece is arranged in the limiting assembly and used for bearing the load of a pressing machine; and a measuring instrument connected to the pressing machine and used for measuring the interference amount of the second end surface of the main bearing bushing. The application realizes accurate and efficient measurement of the interference amount size tolerance of the main bearing bushing.

Description

Technical Field

[0001] This application relates to the field of wind power technology, and more specifically, to a device for measuring the interference fit of a main bearing bush. Background Technology

[0002] Main bearing bushes are used in power units such as diesel engines, automobiles, and ships, as well as rotating machinery such as trains, fans, compressors, steam turbines, and gas turbines, and industrial equipment such as rolling mills, ball mills, and crushers.

[0003] Main bearing bushes typically consist of an upper bush and a lower bush. During equipment operation, the main bearing bushes must not only withstand significant impact forces but also maintain good strength and plasticity to prevent wear on surrounding parts. Therefore, the interference fit tolerance of the main bearing bush is an important technical indicator, and its measurement accuracy directly affects the operating performance and lifespan of the diesel engine.

[0004] Currently, the measurement of the interference fit of main bearing bushes mostly relies on complex testing equipment and cumbersome operating procedures, which is not only time-consuming and labor-intensive, but also has a large measurement error. Utility Model Content

[0005] This application provides a main bearing bush interference measurement device, which realizes accurate and efficient measurement of the interference dimensional tolerance of the upper or lower main bearing bush.

[0006] This application provides a device for measuring the interference fit of a main bearing bush, comprising:

[0007] The template base is provided with a template cavity for placing the main bearing bush, and a first reference surface and a second reference surface provided on the top two sides of the template cavity;

[0008] A clamping assembly is fixedly disposed on the first reference surface, and the clamping assembly is used to position the first end face of the main bearing bush.

[0009] A limiting force-applying component is fixedly connected to the template base and disposed on the second reference surface. The limiting force-applying component includes a limiting component and a force-applying component. The limiting component is provided with a guide cavity. The limiting component is fixedly connected to the template base and disposed on the second reference surface. The force-applying component is disposed in the guide cavity and is used to bear the applied load of the press.

[0010] The measuring instrument, connected to the press, is used to measure the interference fit of the second end face of the main bearing bush.

[0011] In some embodiments, the clamping assembly includes a pressure plate and a locking member. The pressure plate has a clamping surface on the side facing the template base. The clamping surface is used to position and fit against the first reference surface to position the first end face of the main bearing bush. The locking member is used to fasten the pressure plate to the template base.

[0012] In some embodiments, the limiting component includes a pad, the force-applying component includes a pressure rod, the pad is mounted on the second reference surface, the top of the pad has a recess, the top of the base has a mounting bracket, the mounting bracket has an internal through hole, the through hole is coaxially distributed with the recess, the middle part of the pressure rod passes through the through hole and the bottom is disposed in the recess, the top of the pressure rod has a force-applying part, the force-applying part is used to bear the load applied by the press.

[0013] In some embodiments, a measuring instrument clearance space is provided on the side of the pad facing the template cavity, the measuring instrument clearance space being used to accommodate the measuring head of the measuring instrument.

[0014] In some embodiments, the bottom of the pad is provided with a limiting groove with an opening facing the template cavity, and the limiting groove is used to press against the second end face of the main bearing bush.

[0015] In some embodiments, the opening size of the limiting groove gradually increases along the horizontal direction and toward the template cavity.

[0016] In some embodiments, the mounting bracket has a U-shaped structure, and the mounting bracket is formed by extending upward from the second reference surface of the template base.

[0017] In some embodiments, the measuring instrument is a dial indicator, micrometer, electronic micrometer, pneumatic measuring instrument, laser scanner, ultrasonic instrument, or strain gauge.

[0018] The main bearing bush interference measurement device provided in this application can place the main bearing bush by setting a template base with a template cavity. The clamping component is fixedly set on the first reference surface of the template base and is used to position the first end face of the main bearing bush. The limiting force application component is fixed to the template base and set on the second reference surface. The limiting force application component can bear the load applied by the press. The interference of the second end face of the main bearing bush is measured by the measuring instrument.

[0019] This application has a simple structure and can measure the upper main bearing bush or lower main bearing shaft of various models. It has high measurement accuracy and is efficient and convenient, which greatly improves the detection accuracy of the interference fit dimensional tolerance of the main bearing bush. It is applicable to various types of internal combustion engine vehicles and has a wide range of applications. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 A schematic diagram of the template base in the main bearing bush interference measurement device provided in some embodiments of this application;

[0022] Figure 2 This is a schematic diagram of a main bearing bush interference measurement device provided in some embodiments of this application.

[0023] The attached figures are labeled as follows:

[0024] 1- Template base; 2- Pressure plate; 3- Locking component; 4- Limiting component; 5- Force-applying component; 6- Main bearing bush;

[0025] 11-Template cavity. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] In this application, "multiple" means two or more (including two).

[0028] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the template base in the main bearing bush interference measurement device provided in some embodiments of this application. Figure 2 This is a schematic diagram of a main bearing bush interference measurement device provided in some embodiments of this application.

[0029] This application provides a device for measuring the interference fit of a main bearing bush, including a template base 1, a clamping assembly, a limiting force-applying assembly, and a measuring instrument. The template base 1 is provided with a template cavity 11, a first reference surface, and a second reference surface. The first and second reference surfaces are respectively located on the top sides of the template cavity 11, both of which are planar. The clamping assembly is fixedly mounted on the first reference surface, and the two can be detachably connected. The clamping assembly is used to position the first end face of the main bearing bush 6. The limiting force-applying assembly is fixedly connected to the second reference surface of the template base 1. The limiting force-applying assembly includes a limiting component 4 and a force-applying element 5. The limiting component 4 is provided with a guide cavity, which is vertically distributed and extends through the limiting component 4. The limiting component 4 is fixedly connected to the template base 1 and is located on the second reference surface. The force-applying element 5 is located in the guide cavity and bears the load P applied by the press. The measuring instrument is connected to the press and contacts the bush to facilitate reading and measurement. The measuring instrument is used to measure the interference fit of the second end face of the main bearing bush 6.

[0030] like Figure 2 As shown. The template cavity 11 of the template base 1 is a semi-circular structure. Its inner diameter is determined according to the outer diameter of the main bearing bush 6. Optionally, the inner diameter of the template cavity 11 can accommodate the minimum theoretically correct size of the main bearing hole of the upper main bearing bush 6 and the lower main bearing bush 6. The radius of the measuring tool is selected as half of the theoretical size.

[0031] The measurement steps using the main bearing bush interference fit measuring device provided in this application are as follows:

[0032] Step 1: Before measurement, clean the template cavity 11 of the test mold base of the main bearing bush interference measurement device and the back of the steel bush 6 of the main bearing bush to be measured with anhydrous ethanol.

[0033] Step 2: Remove the clamping assembly of the measuring device, and install the main bearing bush 6 to be tested into the template cavity 11 of the inspection mold base of the measuring device. The left end face of the main bearing bush 6 is fixed by the clamping assembly, and the right end face is fixed by the limiting force assembly. The measuring end of the auxiliary measuring instrument is placed against the right end face of the main bearing bush 6, and the measuring instrument is aligned with the zero position.

[0034] Step 3: Start the press. The press applies a load P to the top of the vertical pressure bar according to the standard. The value displayed by the measuring instrument at this time is the interference tolerance value of the main bearing bush 6, so as to realize the measurement of the interference size.

[0035] Step 4: Measure multiple times using the same method described above, and take the average of the measurement results to complete the measurement of the interference tolerance t of the main bearing bush 6.

[0036] This application features a simple structure and convenient operation, enabling rapid and accurate measurement of the interference fit tolerance t of the main bearing bush 6 in different models of internal combustion engine vehicles at the work site. During the measurement process, it not only ensures measurement accuracy but also effectively reduces operational complexity, making the measurement work more efficient and reliable. It is applicable not only to the upper main bearing bush 6 but also to the lower main bearing bush 6, improving the measurement efficiency and accuracy of the main bearing bush 6.

[0037] In one specific embodiment, the clamping assembly includes a pressure plate 2 and a locking member 3. The pressure plate 2 can be a plate-like structure with a clamping surface on the side facing the template base 1. The clamping surface can be, but is not limited to, a plane, but it must be ensured that the clamping surface is positioned and fitted with the first reference surface, thereby positioning the first end face of the main bearing bush 6. The standard inspection mold base is a component required for fixed measurement. The pressure plate 2 supports and positions the main bearing bush 6. The locking member 3 is used to fasten the pressure plate 2. The locking member 3 is vertically arranged, passes through the pressure plate 2 and is locked inside the template base 1. The locking member 3 can fasten the pressure plate 2 and the template base 1, thereby using the clamping assembly to clamp and position the first end face of the main bearing bush 6 to ensure the accuracy of the test.

[0038] In another specific embodiment, the limiting force application component includes a pad and a pressure rod. The pad is a block structure and is installed on the second reference surface. A groove is provided on the top of the pad. The pressure rod is a long rod structure and is set in the groove. A mounting bracket is provided on the top of the base and is connected to the base. The mounting bracket is provided with an internal through hole. The through hole is coaxially distributed with the groove. The middle part of the pressure rod passes through the through hole and the bottom part is set in the groove. The upper part is set outside the through hole.

[0039] The pressure rod applies pressure to the main bearing bush 6 through the pad at its bottom end. The pad is designed with force balance in mind, ensuring uniform pressure distribution. The measuring instrument records the deformation of the main bearing bush 6 after the predetermined pressure is applied, and then calculates the interference fit tolerance t. The press, as the device that applies the predetermined pressure, ensures the accuracy of pressure control during the measurement process.

[0040] Optionally, the mounting bracket may be, but is not limited to, a U-shaped structure. The mounting bracket extends upward from the second reference surface of the template base 1, and the two are integrally formed to ensure the coaxiality of the through hole and the sink.

[0041] To increase the contact area between the pressure bar and the pressure bar, a force-applying section can be provided at the top of the pressure bar. The cross-sectional area of ​​the force-applying section is larger than the area of ​​the pressure bar. The force-applying section is used to bear the applied load P of the press, making the force application more stable and reliable.

[0042] A measuring instrument clearance space is provided on the side of the pad block facing the template cavity 11, such as... Figure 1As shown, the front left part of the pad has a space for the measuring instrument to pass through, which can accommodate the measuring head of the measuring instrument. During measurement, a small part of the bearing is exposed to facilitate contact between the measuring instrument's head and the bearing, making it easy to read the measurement.

[0043] The bottom of the pad is provided with a limiting groove, which opens towards the template cavity 11. The limiting groove can be used to press the second end face of the main bearing bush 6, so that when force is applied, the bottom surface of the pad can make parallel contact with the right end face of the main bearing bush 6 and press the main bearing bush 6. This can effectively press the second end face of the main bearing bush 6, ensuring the accurate positioning of the bush during the assembly process, preventing it from shifting or loosening during operation, improving assembly accuracy and stability, and thus ensuring the accuracy of subsequent measurements.

[0044] To facilitate positioning, the opening size of the limiting groove gradually increases in the horizontal direction and toward the template cavity 11, forming a flared structure. This facilitates the introduction and automatic alignment of the end face of the main bearing bush 6, reducing manual adjustment steps. Furthermore, the gradually expanding design of the limiting groove can accommodate minor dimensional deviations of the bush end face, ensuring uniform force on the pressing surface, reducing local stress concentration, and improving the contact stability between the bush and the pad.

[0045] The measuring instrument can be, but is not limited to, a dial indicator; for example, it can also be a micrometer, an electronic micrometer, a pneumatic measuring instrument, a laser scanner, an ultrasonic instrument, or a strain gauge.

[0046] During measurement, remove the pressure rod and pad of the measuring device. Place the main bearing bush 6 to be measured into the template cavity 11 of the inspection mold base of the measuring device, with the left end face of the main bearing bush 6 in contact with the bottom surface of the pressure plate 2. Then, sequentially insert the pad and pressure rod, ensuring the bottom surface of the pad is parallel to the right end face of the main bearing bush 6. Align the dial indicator head on the wide dial indicator base of the measuring instrument with the front part of the exposed right end face of the main bearing bush 6. Rotate the dial indicator dial until the indicator needle is aligned with zero. Start the press, bringing the press push rod into contact with the upper end face of the pressure rod of the measuring device, and apply the pressure value specified in the technical requirements. The counterclockwise deviation of the dial indicator needle from zero on the wide dial indicator base of the measuring instrument represents the interference tolerance value of the main bearing bush 6. Repeat multiple measurements and take the average value to complete the measurement of the interference tolerance t of the main bearing bush 6.

[0047] The foregoing has provided a detailed description of the main bearing bush interference fit measuring device provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A device for measuring the interference fit of a main bearing bush, characterized in that, include: The template base (1) is provided with a template cavity (11) for placing the main bearing bush (6), and a first reference surface and a second reference surface provided on both sides of the top of the template cavity (11); A clamping assembly is fixedly disposed on the first reference surface. The clamping assembly is used to position the first end face of the main bearing bush (6). A limiting force application component is fixedly connected to the template base (1) and disposed on the second reference surface. The limiting force application component includes a limiting component (4) and a force application component (5). The limiting component (4) is provided with a guide cavity. The limiting component (4) is fixedly connected to the template base (1) and disposed on the second reference surface. The force application component (5) is disposed in the guide cavity and is used to bear the applied load of the press. The measuring instrument is connected to the press and is used to measure the interference fit of the second end face of the main bearing bush (6).

2. The main bearing bush interference fit measuring device according to claim 1, characterized in that, The clamping assembly includes a pressure plate (2) and a locking member (3). The pressure plate (2) has a clamping surface on the side facing the template base (1). The clamping surface is used to position and fit against the first reference surface to position the first end face of the main bearing bush (6). The locking member (3) is used to fasten the pressure plate (2) and the template base (1).

3. The main bearing bush interference measurement device according to claim 2, characterized in that, The limiting component (4) includes a pad, and the force-applying component (5) includes a pressure rod. The pad is installed on the second reference surface. A groove is provided on the top of the pad. A mounting bracket is provided on the top of the base. The mounting bracket is provided with an internal through hole. The through hole is coaxially distributed with the groove. The middle part of the pressure rod passes through the through hole and the bottom is located in the groove. A force-applying part is provided on the top of the pressure rod. The force-applying part is used to bear the load applied by the press.

4. The main bearing bush interference measurement device according to claim 3, characterized in that, A measuring instrument clearance space is provided on the side of the pad block facing the template cavity (11), and the measuring instrument clearance space is used to accommodate the measuring head of the measuring instrument.

5. The main bearing bush interference measurement device according to claim 4, characterized in that, The bottom of the pad is provided with a limiting groove with an opening facing the template cavity (11), and the limiting groove is used to press against the second end face of the main bearing bush (6).

6. The main bearing bush interference measurement device according to claim 5, characterized in that, The opening size of the limiting groove gradually increases along the horizontal direction and toward the template cavity (11).

7. The main bearing bush interference fit measuring device according to any one of claims 3 to 6, characterized in that, The mounting bracket has a U-shaped structure and is formed by extending upward from the second reference surface of the template base (1).

8. The main bearing bush interference fit measuring device according to claim 1, characterized in that, The measuring instrument is a dial indicator, micrometer, electronic micrometer, pneumatic measuring instrument, laser scanner, ultrasonic instrument, or strain gauge.

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