Internal combustion engine piston surface roughness detection device and method

Abstract

The invention discloses an internal combustion engine piston surface roughness detection device which comprises a clamping device and a measuring device. The clamping device comprises a base, a shell, a first sliding block, a plurality of connecting rods and at least two clamping jaws. The shell is pivoted to the base; the first sliding block is slidably connected with the shell, the multiple connecting rods and the two clamping jaws are located on the two opposite sides of the first sliding block respectively, one end of each connecting rod is pivoted to the first sliding block, and the other end of each connecting rod is pivoted to the corresponding clamping jaw; one of the shell and the clamping jaws is provided with a guide groove, the other one of the shell and the clamping jaws is provided with a guide block, and the first sliding block translates relative to the shell so as to drive the two clamping jaws to be close to or far away from each other; the measuring device comprises a measuring probe, a translation device and a sensor; the measuring probe abuts against the surface of the sample to be measured; the translation device is connected with the measuring probe, and the sensor is connected with the measuring probe. The plane roughness and the curved surface roughness of the workpiece to be detected can be measured on the detection device at the same time. The detection time is saved, the detection efficiency is improved, and more accurate data can be obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring devices, and in particular to a device and method for detecting the surface roughness of an internal combustion engine piston. Background Art

[0002] The surface roughness testing device for internal combustion engine pistons is a device specifically designed for accurately measuring the surface roughness of internal combustion engine pistons. Through specific measurement principles and methods, it obtains characteristic information of the piston surface's microscopic profile, thereby evaluating its surface roughness to meet the needs of piston surface quality control and performance optimization during internal combustion engine manufacturing and maintenance. Existing internal combustion engine piston surface roughness testing usually involves measuring the curved surface and the flat surface of the piston separately. The measurement methods for these two parts are different, making it difficult to measure the curved and flat surfaces of the piston in the same way at the same time. Generally, different equipment needs to be replaced for operation, which makes the testing process cumbersome and affects the testing efficiency. If manual measurement is used, the measurement error is relatively large due to the influence of human factors, making it difficult to guarantee the accuracy of the measurement results. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide a surface roughness detection device for an internal combustion engine piston, which can measure not only the planar roughness of the piston but also the curved surface roughness of the piston.

[0004] A second object of the present invention is to provide a method for using a device for detecting surface roughness of an internal combustion engine piston.

[0005] One of the purposes of the present invention is achieved by the following technical solution:

[0006] A device for detecting surface roughness of an internal combustion engine piston, comprising:

[0007] and a gear engaged with the gear trainer and the gear engaged with the gear trainer, and the gear trainer is engaged with the gear trainer in a manner that the gear trainer can use to engage with the gear trainer and the gear trainer at the same time.

[0008] The measuring device includes a measuring probe, a translation device and a sensor; the measuring probe is used to contact the curved surface or flat surface of the sample to be measured; the translation device is connected to the measuring probe and can move the measuring probe in the horizontal direction; the sensor is connected to the measuring probe and is used to collect the signal of the measuring probe.

[0009] Furthermore, the base is provided with a first through hole; the clamping device also includes a rotating handle, the rotating rod of the rotating handle is movably connected to the first slider to drive the first slider to translate relative to the shell; the rotating rod is passed through the first through hole and is threadedly connected to the first through hole.

[0010] Furthermore, the first through hole is a stepped hole structure, the small hole of the first through hole is movably connected to the rotating rod, and the large hole of the first through hole is closer to the shell than the small hole of the first through hole; the large hole is installed with a bearing, and the shell is connected to the bearing.

[0011] Furthermore, the base is provided with a locking device, the shell has a disc portion, the disc portion is nested in the large hole and is coaxially arranged with the large hole, the disc portion is provided with a plurality of locking grooves, and the plurality of locking grooves are distributed at intervals around the circumference of the disc portion; the locking device includes an elastic member and a marble, one end of the elastic member abuts against the base, and the other end of the elastic member abuts against the marble, the marble is located between the disc portion and the elastic member, and the elastic member is used to drive the marble to embed into the locking groove.

[0012] Furthermore, the locking groove passes through from one end of the disc portion to the other end of the disc portion.

[0013] Furthermore, the disc portion is detachably connected to the main body of the shell, and the clamping claw and the connecting rod are both installed on the main body.

[0014] Furthermore, the translation device includes a second slider and a second guide rail, the second guide rail extends along the translation direction of the first slider, the second slider is movably matched with the second guide rail, and the measuring probe is supported by the second slider.

[0015] Furthermore, the measuring device further includes a lifting seat, which is threadedly connected to the second slider so as to be able to be raised and lowered relative to the second lifting seat, and the measuring probe is installed on the second lifting seat.

[0016] Furthermore, the clamping portion of the clamping jaw for clamping the tool is a V-shaped block.

[0017] The second object of the present invention is achieved by adopting the following technical solution:

[0018] A method for detecting a surface roughness of an internal combustion engine piston comprises the following steps:

[0019] placing a workpiece between the jaws and moving the slider to tighten the jaws to clamp the workpiece;

[0020] The housing is rotated to drive the workpiece to rotate and contact the probe to obtain the circumferential surface roughness of the workpiece;

[0021] The measuring probe is driven to translate on the upper end face of the workpiece by moving the translation device to obtain the surface roughness of the end face of the workpiece.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The clamping device drives the connecting rod by moving the slider, thereby simultaneously moving the two jaws apart or together, thereby releasing and clamping the workpiece. The guide block and guide groove limit the movement of the jaws, ensuring that they can smoothly open or clamp the workpiece along the predetermined trajectory, thereby improving the stability and precision of the clamping. Because the two jaws move symmetrically, the center of rotation of the clamping device is aligned with the axis of the workpiece to be measured, ensuring that the workpiece maintains a stable posture during clamping and rotation. This provides a reliable positioning foundation for subsequent measurements, ensuring accurate and consistent measurements.

[0024] The surface roughness of the workpiece under test is tested using a rotating clamping device and a translation device. This device can simultaneously measure both the planar and curved surface roughness of the workpiece. After the workpiece is secured in the clamping area, the clamping device rotates, driving the workpiece around its axis. The measuring probe moves across the curved surface of the workpiece to measure the surface roughness of the curved surface. The translation device is used to move the measuring probe horizontally, allowing it to smoothly slide across the flat surface of the workpiece to measure the roughness of the flat surface. This saves testing time and improves efficiency. Furthermore, the entire testing process relies on the precise movement of the mechanical structure, enabling more accurate data to be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of the internal combustion engine piston surface roughness detection device of the present invention;

[0026] Figure 2 for Figure 1 A cross-sectional view of the locking device shown;

[0027] Figure 3 for Figure 1 A cross-sectional view of the clamping device shown;

[0028] Figure 4 for Figure 1 The schematic diagram of the base shown;

[0029] Figure 5 It is a schematic structural diagram of the internal combustion engine piston surface roughness detection device of the present invention;

[0030] Figure 6 A schematic diagram of an internal combustion engine piston detected by the internal combustion engine piston surface roughness detection device of the present invention;

[0031] Figure 7 for Figure 6 sectional view of .

[0032] In the figure: 1. Clamping device; 101. Base; 102. Shell; 103. First slider; 104. Connecting rod; 105. Clamping claw; 2. Measuring probe; 3. Translation device; 301. Second slider; 302. Second guide rail; 4. First through hole; 5. Turning handle; 6. Turning rod; 7. Bearing; 8. Disc; 9. Locking groove; 10. Elastic member; 11. Marble; 12. Lifting seat. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element, or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element, or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] See also Figure 1-Figure 7 A preferred embodiment of the present invention is a device for detecting the surface roughness of an internal combustion engine piston, comprising: a clamping device 1 and a measuring device.

[0037] The clamping device 1 includes a base 101, a housing 102, a first slider 103, a plurality of connecting rods 104 and at least two clamping jaws 105; the housing 102 is pivotally connected to the base 101 so as to be rotatable relative to a horizontal plane; the first slider 103 is slidably connected to the housing 102 and is circumferentially linked, the plurality of connecting rods 104 are respectively located on opposite sides of the first slider 103, the two clamping jaws 105 are respectively located on opposite sides of the first slider 103, and one end of the connecting rod 104 is connected to the first slider. 103 is pivotally connected, and the other end of the connecting rod 104 is pivotally connected to the clamping jaw 105; one of the housing 102 and the clamping jaw 105 is provided with a guide groove, and the other is provided with a guide block, the guide groove extends in a direction perpendicular to the translation direction of the first slider 103, and the guide block is slidably connected to the guide groove, so that when the first slider 103 translates relative to the housing 102, the two clamping jaws 105 can be driven by the connecting rod 104 to move relatively closer or farther away, and the clamping jaws 105 are used to clamp a workpiece;

[0038] The pivot structure between the shell 102 and the base 101 allows the entire clamping device 1 to rotate within a certain range, so that the orientation of the clamping jaws 105 can be adjusted according to actual needs or the position of the workpiece, so as to more accurately align the workpiece and clamp it. When the shell 102 rotates, the first slider 103, the connecting rod 104 and the clamping jaws 105 connected thereto will rotate together, ensuring that the clamping device 1 always maintains the correct position and posture during the rotation process. The first slider 103 is slidably connected to the shell 102, allowing the first slider 103 to perform linear reciprocating motion within the shell 102, and can be circumferentially connected so that the first slider 103 maintains synchronous rotational motion with the shell 102 during the sliding process. The two ends of the connecting rod 104 are pivotally connected to the first slider 103 and the clamping jaws 105 respectively, which can efficiently convert the linear motion of the first slider 103 into the opening and closing motion of the clamping jaws 105. When the first slider 103 moves forward or backward under the action of a force, the connecting rod 104 drives the jaws 105 to move accordingly, thereby opening or closing the jaws 105 and clamping workpieces of different sizes. The guide grooves on the jaws 105 cooperate with the guide blocks on the housing 102 to form a constraint on the movement trajectory of the jaws 105. This ensures that the jaws 105 can only move in a specific direction within a predetermined plane, avoids the jaws 105 from tilting or shaking during movement, improves the stability and accuracy of the movement of the jaws 105, and thus ensures a smooth and reliable clamping process. In actual application, the workpiece to be clamped is first placed in the clamping area between the two jaws 105, and the distance between the jaws 105 is adjusted by controlling the movement of the first slider 103. When the first slider 103 moves toward the clamping jaw 105, the connecting rod 104 drives the clamping jaws 105 to move closer to each other, the space in the clamping area gradually decreases, and the clamping jaws 105 apply pressure to the workpiece to achieve firm clamping of the workpiece, providing stable support for subsequent measurement operations.

[0039] The measuring device includes a measuring probe 2, a translation device 3 and a sensor; the measuring probe 2 is used to contact the curved surface or flat surface of the sample to be measured; the translation device 3 is connected to the measuring probe 2 and can move the measuring probe 2 in the horizontal direction, and the sensor is connected to the measuring probe 2 and is used to collect the signal of the measuring probe 2. The tip of the measuring probe 2 is made of hard material, such as diamond, which can effectively reduce the wear of the tip during the measurement process, thereby ensuring the accuracy of the measurement results. The probe contacts the surface of the workpiece to be measured. When the probe moves across the surface of the workpiece, the sensor can receive the weak signals generated by the surface undulations. These signals are then processed by the processor to finally obtain relevant data on the surface roughness of the workpiece. The translation device 3 is mainly used to move the measuring probe 2 on a horizontal plane, which facilitates the roughness measurement of the planar part of the workpiece.

[0040] Working Principle: The workpiece to be measured is placed within the clamping area of the clamping device 1. The first slider 103 is then pulled away from the clamping jaws 105 to tighten the jaws 105, securing the workpiece securely. After the workpiece is clamped and secured, the measuring probe 2 is moved close to and in contact with the workpiece surface to be measured. To measure the roughness of a curved surface, the measuring probe 2 is first placed on the workpiece's curved surface, ensuring that the tip is in close contact with the surface. The clamping device 1 is then gently rotated, causing the workpiece to rotate about its own axis. The measuring probe 2 moves along the workpiece's curved surface, while the sensor receives the weak signals generated by the undulations of the surface in real time. This is processed by the processor to obtain surface roughness data. To measure the roughness of a workpiece's flat surface, the translation device 3 is moved to enable the measuring probe 2 to move smoothly on a horizontal plane. During this movement, the probe traverses the flat surface of the workpiece, and the sensor captures the signals generated by the undulations. The processor analyzes and processes these signals to obtain the roughness data for the flat surface.

[0041] Obviously, the clamping device 1 drives the connecting rod 104 to move by moving the slider, thereby achieving the simultaneous separation or approach of the two clamping jaws 105, thereby completing the loosening and clamping of the workpiece. The setting of the guide block and the guide groove limits the moving direction of the clamping jaw 105, ensuring that the clamping jaw 105 can smoothly open or clamp the workpiece along a predetermined trajectory, thereby improving the stability and accuracy of the clamping. Since the two clamping jaws 105 adopt a symmetrical movement method, the rotation center of the clamping device 1 is consistent with the axial direction of the workpiece to be measured, ensuring that the workpiece can maintain a stable posture during the clamping and rotation process, providing a reliable positioning basis for subsequent measurements, and ensuring the accuracy and consistency of the measurement. The surface roughness of the workpiece to be measured is detected by the rotatable clamping device 1 and the translation device 3, and the plane roughness and curved surface roughness of the workpiece to be measured can be measured simultaneously on the detection device. In actual operation, after the workpiece is secured in the clamping area, the clamping device 1 rotates, driving the workpiece around its axis. The measuring probe 2 moves across the workpiece's curved surface, thereby detecting the surface roughness of the curved surface. The translation device 3 is used to move the measuring probe 2 horizontally, allowing it to smoothly slide across the flat surface of the workpiece to measure the surface roughness. This saves testing time and improves efficiency. Furthermore, the entire testing process relies on the precise movement of the mechanical structure, enabling more accurate data to be obtained.

[0042] In this embodiment, the base 101 preferably has a first through-hole 4. The clamping device 1 further includes a rotating handle 5, the rotating rod 6 of which is movably coupled to the first slider 103 to drive the first slider 103 to translate relative to the housing 102. The rotating rod 6 extends through the first through-hole 4 and is threadedly connected thereto. The first through-hole 4 and the rotating handle 5 are threadedly connected, allowing the rotating handle 5 to adjust its relative position to the base 101 by rotation. When the rotating handle 5 rotates, the mechanical action of the threads causes the rotating handle 5 to move linearly along the axis of the first through-hole 4, achieving forward and backward position adjustment. The first slider 103 is coupled to the rotating rod 6 of the rotating handle 5 in a sleeved connection. Therefore, during rotation of the rotating handle 5, the first slider 103 does not rotate with it. As the rotating handle 5 moves along its axis, the first slider 103 also moves accordingly, achieving synchronous position changes. Therefore, the rotation of the rotating handle 5 drives the movement of the slider to open and close the clamping jaws 105.

[0043] The first through hole 4 has a stepped hole structure. The small hole of the first through hole 4 movably engages with the rotating rod 6, while the large hole of the first through hole 4 is closer to the housing 102 than the small hole. A bearing 7 is mounted in the large hole, and the housing 102 is mounted within the bearing 7. The stepped hole structure of the first through hole 4 comprises a small hole portion and a large hole portion. The small hole portion of the first through hole 4 engages with the rotating rod 6, allowing axial movement within the small hole. The large hole portion of the first through hole 4 is closer to the housing 102 than the small hole portion. This arrangement provides more space and convenience for subsequent installation and structural connection. The large hole portion is mounted with a bearing 7, the inner ring of which tightly fits the rotating rod 6, while the outer ring of the bearing 7 is fixed in the large hole. The housing 102 is mounted within the inner ring of the bearing 7, ensuring smooth and stable relative movement between the housing 102 and the base 101.

[0044] In this embodiment, the base 101 is preferably provided with a locking device. The housing 102 has a disc portion 8, which is nested within the large hole and coaxially arranged with the large hole. The disc portion 8 is provided with a plurality of locking grooves 9, which are spaced apart around the circumference of the disc portion 8. The locking device includes an elastic member 10 and a marble 11. One end of the elastic member 10 abuts the base 101, and the other end of the elastic member 10 abuts the marble 11. The marble 11 is located between the disc portion 8 and the elastic member 10, and the elastic member 10 is used to drive the marble 11 into the locking groove 9. To prevent the clamping device 1 from rotating during surface roughness measurement, which could damage the measuring probe 2, a locking device is provided to lock the clamping device 1 when rotation is not required. The locking device mainly comprises an elastic member 10 and a marble 11. One end of the elastic member 10 abuts the base 101, and the other end abuts the marble 11. Under the elastic force generated by the elastic member 10, the marble 11 is pushed into the locking groove 9 of the disc portion 8 and abuts against it. At this time, the marble 11 is located between the locking groove 9 and the base 101, with half of it located in the locking groove 9 and the other half located in the base 101. This allows the clamping device 1 to be effectively fixed when measuring surface roughness, preventing it from rotating unnecessarily, thereby avoiding damage to the measuring probe 2 due to accidental rotation of the clamping device 1. When it is necessary to rotate the clamping device 1 to measure the roughness of a curved surface, as long as the applied rotational force is large enough to overcome the elastic force of the elastic member 10, the marble 11 will be forced to disengage from the locking groove 9, and the clamping device 1 can be rotated.

[0045] The locking groove 9 extends from one end of the disc portion 8 to the other. This through-hole design simplifies the installation process of the locking groove 9. The ball 11 and elastic member 10 can be installed from either end of the disc portion 8 without worrying about installation direction, greatly improving installation flexibility and convenience. This structure also helps ensure the correct position and smooth movement of the ball 11 in the locking groove 9, thereby ensuring that the locking device can effectively prevent accidental rotation of the clamping device 1 and protect the measurement probe 2 from damage.

[0046] The disc portion 8 is detachably connected to the main body of the housing 102, to which the jaws 105 and connecting rod 104 are mounted. This detachable connection between the disc portion 8 and the main body of the housing 102 facilitates assembly and disassembly and maintenance. The jaws 105 and connecting rod 104 are both mounted on the main body, making the entire clamping device 1 more compact and rational. This detachable connection not only enhances the device's flexibility but also enables rapid adjustment and optimization based on actual needs.

[0047] In this embodiment, the translation device 3 preferably includes a second slider 301 and a second guide rail 302. The second guide rail 302 extends along the translation direction of the first slider 103. The second slider 301 and the second guide rail 302 flexibly cooperate, and the measurement probe 2 is supported by the second slider 301. The cooperation between the second slider 301 and the second guide rail 302 enables the second slider 301 to move smoothly and linearly along the extension direction of the second guide rail 302. The second guide rail 302 provides stable support and guidance for the second slider 301, ensuring the linearity and stability of its movement. The measurement probe 2 is supported on the second slider 301. When the second slider 301 moves on the second guide rail 302, the measurement probe 2 also moves synchronously. Due to the smooth movement of the second slider 301, the measurement probe 2 can remain stable during movement, avoiding probe jitter or measurement errors caused by slider shaking or offset, thereby ensuring the stability of the measurement process and the accuracy of the measurement results.

[0048] The measuring device also includes a lifting base 12, which is threadedly connected to the second slider 301 so as to be able to be raised and lowered relative to the second lifting base 12. The measuring probe 2 is mounted on the second lifting base 12. The horizontal height position of the measuring probe 2 is adjusted by the lifting and lowering movement of the lifting base 12, so that the measuring probe 2 can be adjusted in the vertical direction according to actual measurement needs to accommodate different workpieces to be measured or different measurement requirements, thereby improving measurement flexibility and adaptability.

[0049] The clamping portion of the jaws 105 for clamping the tool is a V-block. The V-block can adapt to cylindrical piston workpieces, making the clamping more stable. When the jaws 105 are closed, the two sides of the V-block will fit tightly and wrap around a portion of the workpiece, thereby achieving reliable fixation of the workpiece. The shape and structure of the V-block help to disperse the clamping force, reduce the pressure on the workpiece surface, and prevent damage to the workpiece during the clamping process. At the same time, the design of the V-block also facilitates quick clamping and positioning of the workpiece, improving work efficiency.

[0050] The second object of the present invention is achieved by adopting the following technical solution:

[0051] A method for detecting a surface roughness of an internal combustion engine piston comprises the following steps:

[0052] The workpiece is placed between the jaws 105, and the slider is moved to tighten the jaws 105 to clamp the workpiece. The workpiece is then placed in the clamping area between the jaws 105. The first slider 103 is then moved, driving the two jaws 105 toward each other via the connecting rod 104, shrinking the clamping area and thus firmly clamping the workpiece. This process is achieved through the linkage mechanism between the first slider 103 and the connecting rod 104: when the first slider 103 moves, its displacement is transmitted to the jaws 105 via the connecting rod 104, prompting the jaws 105 to move synchronously. Assisted by the guide grooves and guide blocks, the two jaws 105 ensure movement within a specified range, achieving a secure grip on the workpiece. As the first slider 103 continues to move toward the jaws 105, the two jaws 105 gradually approach each other until the workpiece is firmly clamped, ensuring that the workpiece does not shift or wobble during subsequent measurements. During the clamping process, the V-shaped block structure of the jaws 105 tightly adheres to the workpiece surface, ensuring even distribution of clamping force and effectively preventing damage to the workpiece during clamping.

[0053] The housing 102 is rotated to drive the workpiece into rotational contact with the measuring probe 2, thereby acquiring the workpiece's circumferential surface roughness. The measuring probe 2 is moved to a position in contact with the workpiece surface to be measured, and then the housing 102 is rotated to drive the workpiece into rotation about its axis. During this process, the measuring probe 2 traverses the curved surface of the workpiece. The sensor captures the subtle fluctuation signal generated by the measuring probe 2 as it passes over the surface and transmits it to the processor for processing and analysis. Ultimately, surface roughness data for the curved surface of the workpiece is obtained, enabling accurate measurement of the workpiece's circumferential surface roughness. While the housing 102 is rotating, the workpiece's curved surface remains in contact with the measuring probe 2, ensuring stable acquisition of the measurement signal. The tip of the measuring probe 2 traverses the curved surface of the workpiece smoothly, and its highly sensitive sensor accurately captures the subtle fluctuations on the workpiece surface, thereby ensuring the accuracy of the measurement results.

[0054] The measuring probe 2 is driven by the translation mechanism 3 to translate along the upper end face of the workpiece, thereby obtaining the surface roughness of the workpiece end face. By moving the translation mechanism 3, the measuring probe 2 is smoothly moved along the upper end face of the workpiece, thereby obtaining the surface roughness of the planar portion of the workpiece end face. The smooth movement of the translation mechanism 3 enables accurate measurement of the end face surface roughness. This not only improves measurement flexibility but also ensures the reliability of the measurement data. The smooth and uniform linear motion of the measuring probe 2 along the end face ensures the accuracy of the measurement results.

[0055] After the measurement is completed, the first slider 103 moves away from the clamping jaws 105 to release the clamping jaws 105 and remove the workpiece. This process is simple to operate, improves measurement efficiency, and is applicable to workpieces of various sizes, providing an efficient and reliable solution for quality inspection in industrial production.

[0056] In the description of this specification, the reference terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and integrate different embodiments or examples described in this specification, as well as features of different embodiments or examples, unless they are mutually inconsistent.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0058] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various modifications or substitutions within the technical scope disclosed in this application, and such modifications or substitutions should be included within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A device for detecting surface roughness of an internal combustion engine piston, characterized in that: include: A clamping device (1), comprising a base (101), a shell (102), a first slider (103), a plurality of connecting rods (104) and at least two clamping claws (105); the shell (102) is pivotally connected to the base (101) so as to be rotatable relative to a horizontal plane; the first slider (103) is slidably connected to the shell (102) and is circumferentially linked; the plurality of connecting rods (104) are respectively located on opposite sides of the first slider (103); the two clamping claws (105) are respectively located on opposite sides of the first slider (103); the connecting rods (104) are One end is pivotally connected to the first slider (103), and the other end of the connecting rod (104) is pivotally connected to the clamping jaw (105); one of the housing (102) and the clamping jaw (105) is provided with a guide groove, and the other is provided with a guide block, the guide groove extends along a direction perpendicular to the translation direction of the first slider (103), and the guide block is slidably connected to the guide groove, so that when the first slider (103) translates relative to the housing (102), the two clamping jaws (105) can be driven by the connecting rod (104) to move relatively closer or farther away, and the clamping jaws (105) are used to clamp a workpiece; A measuring device, comprising a measuring probe (2), a translation device (3) and a sensor; the measuring probe (2) is used to contact a curved surface or a flat surface of a sample to be measured; the translation device (3) is connected to the measuring probe (2) and is capable of moving the measuring probe (2) in a horizontal direction; and the sensor is connected to the measuring probe (2) and is used to collect signals from the measuring probe (2).

2. The internal combustion engine piston surface roughness detection device according to claim 1, characterized in that: The base (101) is provided with a first through hole (4); the clamping device (1) further comprises a rotating handle (5), a rotating rod (6) of the rotating handle (5) being movably sleeved with the first slider (103) so as to drive the first slider (103) to translate relative to the housing (102); the rotating rod (6) is passed through the first through hole (4) and is threadedly connected to the first through hole (4).

3. The internal combustion engine piston surface roughness detection device according to claim 2, characterized in that: The first through hole (4) is a stepped hole structure, the small hole of the first through hole (4) is movably sleeved with the rotating rod (6), and the large hole of the first through hole (4) is closer to the housing (102) than the small hole of the first through hole (4); a bearing (7) is installed in the large hole, and the housing (102) is sleeved in the bearing (7).

4. The internal combustion engine piston surface roughness detection device according to claim 3, characterized in that: The base (101) is provided with a locking device, and the shell (102) has a disc portion (8), the disc portion (8) is nested in the large hole and is coaxially arranged with the large hole, the disc portion (8) is provided with a plurality of locking grooves (9), and the plurality of locking grooves (9) are distributed at intervals around the circumference of the disc portion (8); the locking device includes an elastic member (10) and a marble (11), one end of the elastic member (10) is in contact with the base (101), and the other end of the elastic member (10) is in contact with the marble (11), and the marble (11) is located between the disc portion (8) and the elastic member (10), and the elastic member (10) is used to drive the marble (11) to embed into the locking groove (9).

5. The internal combustion engine piston surface roughness detection device according to claim 4, characterized in that: The locking groove (9) extends from one end of the disc portion (8) to the other end of the disc portion (8).

6. The internal combustion engine piston surface roughness detection device according to claim 5, characterized in that: The disc portion (8) is detachably connected to the main body of the housing (102), and the clamping claw (105) and the connecting rod (104) are both mounted on the main body.

7. The internal combustion engine piston surface roughness detection device according to claim 2, characterized in that: The translation device (3) comprises a second slider (301) and a second guide rail (302); the second guide rail (302) extends along the translation direction of the first slider (103); the second slider (301) and the second guide rail (302) are movably matched; and the measuring probe (2) is supported by the second slider (301).

8. The internal combustion engine piston surface roughness detection device according to claim 7, characterized in that: The measuring device further comprises a lifting seat (12), the lifting seat (12) being threadedly connected to the second slider (301) so as to be able to be lifted and lowered relative to the lifting seat (12), and the measuring probe (2) being mounted on the lifting seat (12).

9. The internal combustion engine piston surface roughness detection device according to claim 1, characterized in that: The clamping portion of the clamping jaw (105) for clamping a tool is a V-shaped block.

10. A detection method for an internal combustion engine piston surface roughness detection device, characterized in that: The device for detecting surface roughness of an internal combustion engine piston comprises the device according to any one of claims 1 to 9, and comprises the following steps: Placing a workpiece between the clamping jaws (105), and moving the slider to tighten the clamping jaws (105) to clamp the workpiece; The housing (102) is rotated to drive the workpiece to rotate and contact the probe to obtain the circumferential surface roughness of the workpiece; The measuring probe (2) is driven to translate on the upper end face of the workpiece by moving the translation device (3) to obtain the surface roughness of the end face of the workpiece.

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