Detection device for projection welding nut of automobile

Abstract

The utility model relates to the technical field of nut detection, and discloses a detection device for an automobile projection welding nut, which comprises an outer sleeve, a detection pin is inserted in the lower side of the inner part of the outer sleeve, a sensor is inserted in the upper side of the inner part of the outer sleeve, and a detection insertion rod is inserted in the detection pin; the connecting ring groove is formed in the lower side of the detection insertion rod, a through groove is formed in the bottom of the detection pin in the circumferential direction, and an external expansion supporting plate is arranged at the outer end of the hinge lug; the transverse plates are connected to the left side and the right side of the top of the detection insertion rod, and the bottom end of the detection insertion rod is coaxially connected with an abutting head. According to the detection device for the projection welding nut of the automobile, a transverse plate is pulled to enable a connecting ring groove to drive a hinge lug and an external expansion supporting plate to be closed, so that a detection pin can be inserted into a to-be-detected nut mounting hole, the transverse plate is loosened after insertion, the external expansion supporting plate can be reset and opened again under the thrust of a spring, the inner wall of the mounting hole can be clamped, and the detection accuracy is improved. And the detection precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nut detection, in particular to a detection device for automobile projection welding nuts. Background Art

[0002] In the welding of automobile bodies, nuts are first projection welded to various positions of the white body, and then resistance welded. Therefore, it is necessary to detect whether there are nuts or whether the nuts are installed in place during welding. Because nuts are invisible, nut detection devices can be used to detect nuts. Therefore, nut detection devices are indispensable and important equipment in the automobile manufacturing process. They can ensure the quality and reliability of projection welded nuts and improve the safety and performance of automobiles. With the continuous development of technology, the performance and functions of this detection device will continue to improve and perfect.

[0003] A common nut detection device generally includes a detection rod and a sensor. When in use, the detection rod is inserted into the inside of the mounting hole, and the sensor is used to detect the resistance position of the nut to the detection rod. However, since the detection rod is in a pointed cone shape, it is easy to tilt when inserted into the mounting hole, causing a deviation in the rebound distance of the detection rod, which is easy to cause the sensor to misjudge and cause a deviation in the detection of the nut. The working requirements of nut detection cannot be met. Therefore, a detection device for automotive projection welding nuts is proposed. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a detection device for automotive projection welding nuts to solve the technical problem that the detection rod is in a pointed cone shape, which makes it easy to tilt when inserted into the mounting hole, causing deviation in the rebound distance of the detection rod.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a detection device for automobile projection welding nuts, comprising:

[0008] An outer sleeve, wherein a detection pin is inserted into the lower side of the inner part of the outer sleeve, a sensor is inserted into the upper side of the inner part of the outer sleeve, and a detection rod is inserted into the inner part of the detection pin;

[0009] A connecting ring groove is provided at the lower side of the detection plug rod, the inner circumference of the connecting ring groove is connected with an articulated frame, the bottom circumference of the detection pin is provided with a through groove, the outer end of the articulated frame is movably connected with an articulated ear through a bearing, and the outer end of the articulated ear is provided with an outward expansion support plate;

[0010] The horizontal plate is connected to the left and right sides of the top of the detection rod, and the bottom end of the detection rod is coaxially connected with a contact head.

[0011] Preferably, a limit plate is installed in the middle position of the detection pin, the detection rod passes through the interior of the limit plate and is connected to the inner side of the limit plate, and a spring is sleeved on the upper side of the rod body of the detection rod to facilitate the detection rod to be reset.

[0012] Preferably, slide grooves are provided at positions on the left and right sides of the outer sleeve corresponding to the cross plate, and the height of the slide grooves is four times that of the cross plate, which facilitates the up and down movement of the cross plate and avoids interference.

[0013] Preferably, the number of the articulated frames is 3-5 groups, which improves the stability of the support during detection. The inner upper and lower parts of the articulated ears are both rounded, and a gap is left between the top of the outward support plate and the inner upper side of the through slot to prevent interference with the top of the through slot when the outward support plate is opened and closed.

[0014] Preferably, handles are connected to the lower parts of the left and right sides of the outer sleeve, the corners of the handles are arc-shaped, and the outsides of the handles are covered with anti-slip sleeves to facilitate the insertion and removal of the detection pin.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a detection device for automobile projection welding nuts, which has the following beneficial effects:

[0017] The detection device for automobile convex welding nuts pulls the cross plate so that the connecting ring groove drives the hinged ear and the outward expansion support plate to close, so that the detection pin can be inserted into the nut mounting hole to be detected. After the insertion, the cross plate is loosened, and the outward expansion support plate can be reset and opened again under the thrust of the spring, so that it can clamp the inner wall of the mounting hole, and then the detection pin can be vertically and stably inserted into the mounting hole, and the abutment head can contact the surface of the nut. When there is a nut after the contact, as the detection pin is continuously inserted, the abutment head will be pushed, so that the detection rod rises, so that its top end contacts the detection probe of the sensor, and the nut can be detected, thereby improving the detection accuracy. At the same time, the outward expansion support plate can be driven to close when the abutment head is pushed, which is convenient for rapid extraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the outer sleeve of the utility model;

[0020] Figure 3This is a schematic diagram of the cross-sectional structure of the detection pin of the utility model;

[0021] Figure 4 This is a schematic diagram of the bottom structure of the detection pin of the utility model;

[0022] Figure 5 It is a schematic diagram of the outward expansion support plate structure of the utility model.

[0023] In the figure: 1. outer sleeve; 2. detection pin; 3. sensor; 4. handle; 5. detection rod; 6. limit plate; 7. spring; 8. contact head; 9. through groove; 10. connecting ring groove; 11. hinged frame; 12. outward expansion support plate; 121. hinged ear; 13. slide groove; 14. cross plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The utility model provides a technical solution, a detection device for automobile projection welding nuts, including an outer sleeve 1, a detection pin 2, a sensor 3, a handle 4, a detection rod 5, a limit plate 6, a spring 7, a contact head 8, a through groove 9, a connecting ring groove 10, an articulated frame 11, an outward expansion support plate 12, an articulated ear 121, a slide groove 13 and a cross plate 14:

[0026] See also Figure 1 , a detection pin 2 is inserted into the lower side of the outer sleeve 1, and a sensor 3 is inserted into the upper side of the inner side of the outer sleeve 1, please refer to Figure 2 , a detection rod 5 is inserted inside the detection pin 2;

[0027] See also Figure 4 The connecting ring groove 10 is provided on the lower side of the detection rod 5, and the inner circumference of the connecting ring groove 10 is connected with a hinge frame 11, see Figure 1 , a through groove 9 is provided in the circumferential direction at the bottom of the detection pin 2, see Figure 3 The outer end of the articulated frame 11 is movably connected to a hinge ear 121 through a bearing, see Figure 4 The outer end of the hinged ear 121 is provided with an outward expansion support plate 12, the inner upper and lower parts of the hinged ear 121 are both rounded, and a gap is left between the top of the outward expansion support plate 12 and the inner upper side of the through slot 9;

[0028] See also Figure 2 , the horizontal plate 14 is connected to the left and right sides of the top of the detection rod 5, please refer to Figure 3The bottom end of the detection rod 5 is coaxially connected with a contact head 8, a limit plate 6 is installed in the middle position of the detection pin 2, the detection rod 5 passes through the inside of the limit plate 6 and is connected to the inner side of the limit plate 6, and a spring 7 is sleeved on the upper side of the rod body of the detection rod 5, please refer to Figure 1 , the left and right sides of the outer sleeve 1 are provided with sliding grooves 13 at positions corresponding to the cross plate 14, and the height of the sliding grooves 13 is four times that of the cross plate 14. The number of the articulated frames 11 is 3-5 groups. By pulling the cross plate 14, the connecting ring groove 10 drives the hinge ear 121 and the outer expansion support plate 12 to close, so that the detection pin 2 can be inserted into the nut mounting hole to be detected. After insertion, the cross plate 14 is loosened, and the outer expansion support plate 12 can be reset and opened again under the thrust of the spring 7, so that it can clamp the inner wall of the mounting hole, so that the detection pin 2 can be vertically and stably inserted into the mounting hole, and the contact head 8 can contact the surface of the nut. When there is a nut after contact, as the detection pin 2 is continuously inserted, the contact head 8 will be pushed, so that the detection rod 5 rises, so that its top end contacts the detection probe of the sensor 3, and the nut can be detected, which improves the detection accuracy. At the same time, when the contact head 8 is pushed, the outer expansion support plate 12 can be closed, which is convenient for rapid extraction;

[0029] The lower parts of the left and right sides of the outer sleeve 1 are connected with handles 4. The corners of the handles 4 are all arc-shaped, and the outsides of the handles 4 are all covered with anti-slip sleeves.

[0030] The present solution pulls the cross plate 14 so that the connecting ring groove 10 drives the hinge ear 121 and the outward expansion support plate 12 to close, so that the detection pin 2 can be inserted into the nut mounting hole to be detected. After insertion, the cross plate 14 is loosened, and the outward expansion support plate 12 can be reset and expanded again under the thrust of the spring 7, so that it can clamp the inner wall of the mounting hole, so that the detection pin 2 can be vertically and stably inserted into the mounting hole, and the contact head 8 can contact the surface of the nut. When there is a nut after contact, as the detection pin 2 is continuously inserted, the contact head 8 will be pushed, so that the detection rod 5 rises, so that its top end contacts the detection probe of the sensor 3, and the nut can be detected, thereby improving the detection accuracy. At the same time, the outward expansion support plate 12 can be closed when the contact head 8 is pushed, which is convenient for quick removal.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A detection device for automotive projection welding nuts, characterized in that: include: An outer sleeve (1), a detection pin (2) is inserted into the lower side of the inner part of the outer sleeve (1), a sensor (3) is inserted into the upper side of the inner part of the outer sleeve (1), and a detection plug rod (5) is inserted into the inner part of the detection pin (2); a connecting ring groove (10) is provided on the lower side of the detection plug rod (5), the inner part of the connecting ring groove (10) is circumferentially connected to an articulated frame (11), the bottom of the detection pin (2) is circumferentially provided with a through groove (9), the outer end of the articulated frame (11) is movably connected to an articulated ear (121) through a bearing, and the outer end of the articulated ear (121) is provided with an outward expansion support plate (12); a horizontal plate (14) is connected to the left and right sides of the top of the detection plug rod (5), and the bottom end of the detection plug rod (5) is coaxially connected to a contact head (8).

2. A detection device for automotive projection welding nuts according to claim 1, characterized in that: A limit plate (6) is installed in the middle position of the detection pin (2), the detection rod (5) passes through the inside of the limit plate (6) and is connected to the inner side of the limit plate (6), and a spring (7) is sleeved on the upper side of the rod body of the detection rod (5).

3. The detection device for automobile projection welding nuts according to claim 1, characterized in that: Slide grooves (13) are provided at positions on the left and right sides of the outer sleeve (1) corresponding to the transverse plate (14), and the height of the slide grooves (13) is four times that of the transverse plate (14).

4. A detection device for automotive projection welding nuts according to claim 1, characterized in that: The number of the hinged frames (11) is 3-5 groups, the inner upper and lower parts of the hinged ears (121) are both rounded, and a gap is left between the top of the outwardly expanded support plate (12) and the inner upper side of the through slot (9).

5. The detection device for automobile projection welding nuts according to claim 1, characterized in that: The lower parts of the left and right sides of the outer sleeve (1) are both connected to handles (4), the corners of the handles (4) are both arranged in an arc shape, and the outsides of the handles (4) are both covered with anti-slip covers.

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