Automobile part inner diameter detection device

Abstract

The utility model relates to the technical field of automobile part detection, and particularly discloses an automobile part inner diameter detection device which is used for detecting the inner diameter of an automobile part, and during detection, a sleeve shell and a radial opening and closing module are driven by a first driving device to move downwards until an opening and closing piece completely extends into a hole of the automobile part; then the second driving device drives the pull rod to move upwards, the pull rod moves in the axial direction to drive the opening and closing piece to move in the radial direction, the opening and closing piece is opened outwards in the radial direction till the opening and closing piece makes contact with the inner wall of the hole of the automobile part, due to the limiting effect of the inner wall of the hole, the opening and closing piece cannot continue to move outwards, and the maximum stroke of the pull rod in the axial direction is limited; the detection distance is detected according to the distance detection of the distance measuring sensor on the ejector rod, whether the inner diameter of the automobile part meets the standard or not is indirectly judged according to the difference between the standard distance and the detection distance, and the structure is ingenious.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts detection, in particular to an inner diameter detection device for automobile parts. Background Art

[0002] As Figure 1 described, an axially-through hole is provided in an automobile part 20 such as a piston, and a pin shaft is inserted into the hole. The automobile part 20 and the connecting rod are connected by the pin shaft. A small clearance fit exists between the pin shaft and the hole of the automobile part 20. When the engine is operating at high speed, the pin shaft will move axially.

[0003] Generally, after the production of automobile parts is completed, it is necessary to detect the size of the hole. The conventional detection device is to set two expandable rollers, and the inner diameter of the hole of the automobile part is detected by the moving distance between the rollers. This kind of structure can be referred to an automobile part detection device disclosed in Chinese Patent Publication No. CN218787815U, including a detection table, a support plate is fixedly connected to the upper surface of the detection table, and a lifting plate is slidably connected inside the support plate. A rotating shaft is provided inside one end of the lifting plate, and a rotating plate is fixedly connected to the lower end of the rotating shaft. First sliding grooves are symmetrically formed inside the rotating plate, and sliders are slidably connected inside the first sliding grooves. A cross plate is fixedly connected to the upper surface of the slider, and a spring is provided on one side of the cross plate. An inverted L-shaped plate is fixedly connected to the upper surface of the rotating plate, and a distance measuring instrument is fixedly connected to the lower surface of the inverted L-shaped plate. A detection component is provided on the upper surface of the slider, and a detection roller is rotatably connected to the lower surface of the slider.

[0004] The existing inner diameter detection device for automobile parts uses two rollers for detection, with low detection accuracy and the detection accuracy cannot be effectively guaranteed.

[0005] Therefore, the existing technology still needs to be improved and developed. Summary of the Utility Model

[0006] In view of the above deficiencies of the existing technology, the purpose of the present utility model is to provide an inner diameter detection device for automobile parts to solve the problem of low detection accuracy of the existing inner diameter detection device for automobile parts.

[0007] An inner diameter detection device for automobile parts, including an inner diameter detection mechanism. The inner diameter detection mechanism includes a first driving device driven in the z-axis direction, a sleeve connected to the output end of the first driving device, and a radial opening and closing module fixed to the lower end of the sleeve. The radial opening and closing module includes a second driving device, a bottom plate fixed to the lower end of the second driving device, at least two swing arms rotatably arranged on the bottom plate, an opening and closing member connected to the lower end of the swing arm, and a pull rod connected to the lower end of the driving shaft of the second driving device. The opening and closing member is arranged around the pull rod, and the axial movement of the pull rod can drive the radial movement of the opening and closing member. The upper end of the driving shaft of the second driving device is connected with an inner rod, the inner rod is movably arranged inside the sleeve in the z direction, a top rod is arranged above the inner rod, and a distance measuring sensor is arranged above the top rod.

[0008] Specifically, the pull rod includes a frustum-shaped part with a smaller upper part and a larger lower part, and the end of the opening and closing member facing the pull rod is provided with a guiding surface matching the outer shape of the frustum-shaped part.

[0009] Specifically, the inner diameter detection device for automobile parts further includes a first support, the first driving device is fixed to the first support, and a marking mechanism is arranged on the first support. The marking mechanism includes a marking pen facing the lower part of the opening and closing member, and a third driving device for driving the marking pen to move downward towards the lower part of the opening and closing member.

[0010] Specifically, the first driving device, the second driving device, and the third driving device are all cylinders.

[0011] The beneficial effects of the present utility model:

[0012] The inner diameter detection device for automobile parts of the present application is used for detecting the inner diameter of automobile parts. During detection, the first driving device drives the sleeve and the radial opening and closing module to move downward until the opening and closing member completely extends into the hole of the automobile part. Then, the second driving device drives the pull rod to move upward. The axial movement of the pull rod can drive the radial movement of the opening and closing member, so that the opening and closing member opens radially outward until it contacts the inner wall of the hole of the automobile part. Due to the limiting effect of the inner wall of the hole, the opening and closing member cannot continue to move outward, that is, the maximum axial stroke of the pull rod is limited. According to the distance detection of the top rod by the distance measuring sensor, the detection distance is measured. According to the difference between the standard distance and the detection distance, it is indirectly judged whether the inner diameter of the automobile part meets the standard. The structure is ingenious. Description of the drawings

[0013] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

[0014] Figure 1 Is the top view of the automobile part;

[0015] Figure 2 The top view of the inner diameter detection device for automobile parts of the present utility model;

[0016] Figure 3 The sectional structure diagram of the inner diameter detection mechanism of the present utility model;

[0017] Figure 4 The structural schematic diagram of the swing arm and the pull rod of the present utility model;

[0018] Figure 5 The structural schematic diagram of the radial opening and closing module of the present utility model;

[0019] Figure 6 The structural schematic diagram of the swing arm, the opening and closing member and the pull rod of the present utility model;

[0020] Figure 7 The structural schematic diagram of the swing arm and the opening and closing member of the present utility model;

[0021] Figure 8 The structural schematic diagram of the marking mechanism of the present utility model.

[0022] Reference numerals are: automobile parts 20, inner diameter detection mechanism 40, first driving device 41, housing 42, radial opening and closing module 43, second driving device 431, bottom plate 432, swing arm 433, opening and closing member 434, pull rod 435, inner rod 44, ejector rod 45, distance measuring sensor 46, frustum part 4351, first support 47, marking mechanism 50, marking pen 51, third driving device 52. Detailed implementation manners

[0023] The present utility model provides an inner diameter detection device for automobile parts. To make the purpose, technical solution and effects of the present utility model clearer and more definite, the following further describes the present utility model in detail with reference to the accompanying drawings and by way of examples. It should be understood that the specific examples described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0025] Please refer to Figures 1 to 8, this embodiment discloses an inner diameter detection device for auto parts, including an inner diameter detection mechanism 40. The inner diameter detection mechanism 40 includes a first driving device 41 driven in the z-axis direction, a sleeve 42 connected to the output end of the first driving device 41, and a radial opening and closing module 43 fixed to the lower end of the sleeve 42. The radial opening and closing module 43 includes a second driving device 431, a bottom plate 432 fixed to the lower end of the second driving device 431, at least two swing arms 433 rotatably arranged on the bottom plate 432, an opening and closing member 434 connected to the lower end of the swing arm 433, and a pull rod 435 connected to the lower end of the driving shaft of the second driving device 431. The opening and closing member 434 is arranged around the pull rod 435. The axial movement of the pull rod 435 can drive the radial movement of the opening and closing member 434. The upper end of the driving shaft of the second driving device 431 is connected with an inner rod 44. The inner rod 44 moves axially inside the sleeve 42. A top rod 45 is arranged above the inner rod 44, and a distance measuring sensor 46 is arranged above the top rod 45.

[0026] The inner diameter detection device for auto parts in this embodiment is applicable to the detection of the inner diameter of the hole of auto parts 20. When the auto parts 20 are conveyed below the inner diameter detection mechanism 40, the first driving device 41 drives the sleeve 42 and the radial opening and closing module 43 to move downward until the opening and closing member 434 completely extends into the hole of the auto parts 20. Then, the second driving device 431 drives the pull rod 435 to move upward. The axial movement of the pull rod 435 can drive the radial movement of the opening and closing member 434, so that the opening and closing member 434 opens outward in the radial direction until it contacts the inner wall of the hole of the auto parts 20. Due to the limiting effect of the inner wall of the hole, the opening and closing member 434 cannot continue to move outward, that is, the maximum axial stroke of the pull rod 435 is limited. Since the upper end of the driving shaft of the second driving device 431 is connected with an inner rod 44 and a top rod 45 is arranged above the inner rod 44, the top rod 45 can move synchronously with the pull rod 435. A distance measuring sensor 46 is arranged above the top rod 45. According to the distance detection of the top rod 45 by the distance measuring sensor 46, the detection distance is measured. According to the difference between the standard distance and the detection distance, it is indirectly judged whether the inner diameter of the auto parts 20 meets the standard. The structure is ingenious.

[0027] For the convenience of understanding, it is set that the standard distance between the sensing end of the distance measuring sensor 46 and the top end of the top rod 45 is d 0 ; Before measurement, the initial detection distance between the sensing end of the distance measuring sensor 46 and the top rod 45 is d 1 ; The axial stroke of the pull rod 435 is h 1 ; During the test, the detection distance between the sensing end of the distance measuring sensor 46 and the top end of the top rod 45 is d 1 -h 1 ; There are two situations in the detection process; The first situation is: If d 1 -h 1 = d 0, it indicates that the inner hole of the auto part 20 conforms to the standard inner hole size and is determined to be a good product; the second case is: if d 1 -h 1 > d 0 or d 1 -h 1 < d 0 , it indicates that the inner hole of the auto part 20 does not conform to the standard inner hole size and is determined to be a defective product.

[0028] Furthermore, please refer to Figure 3 . The pull rod 435 includes a frustum-shaped portion 4351 that is smaller at the top and larger at the bottom. One end of the opening and closing member 434 facing the pull rod 435 is provided with a guiding surface that matches the outer shape of the frustum-shaped portion 4351. When the pull rod 435 moves upward, by using the guiding effect of the frustum-shaped portion 4351 on the guiding surface, the opening and closing member 434 can be gradually opened outward in the radial direction, and the structure is ingenious.

[0029] Furthermore, please refer to Figure 2 and Figure 8 . The inner diameter detection device 40 of the auto part in this embodiment further includes a first support 47. The first driving device 41 is fixed to the first support 47. A marking mechanism 50 is provided on the first support 47. The marking mechanism 50 includes a marking pen 51 facing the lower part of the opening and closing member 434, and a third driving device 52 for driving the marking pen 51 to move downward toward the lower part of the opening and closing member 434. According to the detection situation of the inner diameter detection device 40 of the auto part, if a defective auto part 20 is detected, the third driving device 52 is used to drive the marking pen 51 to move downward toward the lower part of the opening and closing member 434, and the tip of the marking pen 51 dots and marks the defective auto part 20. The marking pen 51 can be a pen with an obvious color, such as a red pen, a green pen, etc.

[0030] Subsequently, it can cooperate with a CCD vision recognition device. When the auto part 20 is conveyed to the recognition area of the CCD vision recognition device, if the CCD vision recognition device recognizes the mark, the defective auto part 20 is transferred to the defective product conveying channel through a transfer device such as a manipulator; if the CCD vision recognition device does not recognize the mark, the good auto part 20 is transferred to the good product conveying channel through a transfer device such as a manipulator.

[0031] The first driving device 41, the second driving device 431, and the third driving device 52 are all cylinders. The cylinder has a simple structure, is lightweight, has a rapid action, and a fast response.

[0032] The above has specifically described the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art can also make various equivalent variations or substitutions without departing from the spirit of the present invention, and these equivalent variations or substitutions are all included within the scope defined by the claims of the present invention.

Claims

1. An inner diameter detection device for automobile parts, characterized in that: The invention comprises an inner diameter detection mechanism (40), wherein the inner diameter detection mechanism (40) comprises a first driving device (41) driven along the z-axis direction, a casing (42) connected to the output end of the first driving device (41), and a radial opening and closing module (43) fixed to the lower end of the casing (42); the radial opening and closing module (43) comprises a second driving device (431), a bottom plate (432) fixed to the lower end of the second driving device (431), at least two swing arms (433) rotatably arranged on the bottom plate (432), and an opening and closing device (433) connected to the lower end of the swing arm (433). The second driving device (431) comprises a driving member (434), a pull rod (435) connected to the lower end of the driving shaft of the second driving device (431), the opening and closing member (434) is arranged around the pull rod (435), the axial movement of the pull rod (435) can drive the radial movement of the opening and closing member (434), the upper end of the driving shaft of the second driving device (431) is connected to an inner rod (44), the inner rod (44) moves along the z direction on the inner side of the sleeve (42), a push rod (45) is arranged above the inner rod (44), and a distance measuring sensor (46) is arranged above the push rod (45).

2. The inner diameter detection device of an automobile part according to claim 1, characterized in that: The pull rod (435) comprises a truncated cone portion (4351) which is smaller at the top and larger at the bottom, and the opening and closing member (434) is provided with a guiding surface matching the outer shape of the truncated cone portion (4351) at one end facing the pull rod (435).

3. The inner diameter detection device for automobile parts according to claim 1, characterized in that: The inner diameter detection mechanism (40) further comprises a first support (47), the first driving device (41) is fixed to the first support (47), a marking mechanism (50) is provided on the first support (47), the marking mechanism (50) comprises a marking pen (51) facing downward of the opening and closing member (434), and a third driving device (52) for driving the marking pen (51) to move downward of the opening and closing member (434).

4. The inner diameter detection device for automobile parts according to claim 3, characterized in that: The first driving device (41), the second driving device (431) and the third driving device (52) are all cylinders.

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