Welded nut leakage-proof detection device

Abstract

The utility model relates to the technical field of automobile part welding detection, in particular to a welding nut leakage-proof detection device which comprises a machine base, a fixed guide groove, a mounting frame, a proximity switch, a movable guide groove and a driving assembly. During use, the proximity switch detects whether the surface of a to-be-detected part has a welding nut. And when the proximity switch does not detect the welding nut on the surface of the to-be-detected part, the driving assembly drives the movable guide groove to reach the second working position, so that the to-be-detected part slides off from the gap between the fixed guide groove and the movable guide groove, the to-be-detected part without welding of the welding nut is screened out, and the effect of preventing missing detection of the welding nut is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding detection of automobile parts, and particularly relates to a leakage prevention detection device for welding nuts. Background Art

[0002] During the automobile manufacturing process, the problem of whether the welding nuts are welded or not has always been a difficult problem in the field of automobile manufacturing. Since the projection welding nut assemblies on some automobile parts are located inside the vehicle body cavity, it is very difficult to check and confirm whether there are problems such as missed welding in the subsequent processes after welding into the assembly. If it is found that these key nuts are missed welded during the production process, the entire vehicle body will be discarded, which brings huge cost pressure to automobile manufacturers.

[0003] In the prior art, manual inspection is often used for the leakage prevention detection of welding nuts on parts. Although this method is simple, the reliability of manual inspection is limited by the skills, experience and fatigue degree of the operators. Long-term repetitive work may lead to a decline in attention, thus increasing the risk of missed inspection and misjudgment. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a leakage prevention detection device for welding nuts to solve the problem of easy missed inspection in the leakage prevention detection of welding nuts manually.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: a leakage prevention detection device for welding nuts, comprising:

[0006] A machine base, with a fixed column provided at the top;

[0007] A fixed guide groove, fixedly installed on the machine base, the fixed guide groove is inclined, one end of the fixed guide groove is close to the machine base, and the other end is far from the machine base;

[0008] An installation frame, fixedly installed on the fixed guide groove, located at the upper section of the fixed guide groove;

[0009] A proximity switch, fixedly installed on the installation frame, the proximity switch is used to detect the welding nuts on the parts to be tested in the fixed guide groove;

[0010] A movable guide groove, with a transmission arm fixedly connected to the outside, one end of the transmission arm is hinged to the fixed column; the movable guide groove has a first working position and a second working position. When the movable guide groove is in the first working position, the movable guide groove contacts the lower end of the fixed guide groove and forms a through groove; when the movable guide groove is in the second working position, the movable guide groove is separated from the fixed guide groove and forms a channel for the parts to be tested to pass through at intervals;

[0011] The driving component drives the movable guide groove to reach the second working position when the proximity switch detects that there is no welding nut on the part to be tested in the fixed guide groove.

[0012] The present utility model is further configured such that the driving component includes a cylinder, a connecting seat and a controller. The cylinder is fixedly installed on the machine base through the connecting seat. The controller is connected to the cylinder and the proximity switch through circuits respectively. A transmission plate is fixedly connected to the transmission arm. During the switching process of the movable guide groove between the first working position and the second working position, the lower side of the transmission plate is always in sliding contact with the output end of the cylinder.

[0013] The present utility model is further configured such that the mounting bracket is in a gate shape. The two ends of the mounting bracket are respectively fixedly connected to the two sides of the fixed guide groove. An installation hole is provided in the middle of the mounting bracket. The proximity switch is inserted into the installation hole. A threaded hole is provided on the side of the mounting bracket. The threaded hole communicates with the installation hole. A locking bolt is threadedly connected in the threaded hole. One end of the locking bolt abuts against the proximity switch.

[0014] The present utility model is further configured such that one end of the fixed guide groove close to the machine base is welded and connected to the inner side of the fixed column. A support column is provided between the machine base and the other end of the fixed guide groove. The two ends of the support column are respectively fixedly connected to the machine base and the fixed guide groove.

[0015] The present utility model is further configured such that a collecting box is fixedly connected to the side of the machine base. The collecting box is located below the junction of the fixed guide groove and the movable guide groove.

[0016] The present utility model is further configured such that the machine base is a box body. The side of the box body is open. A box door is covered at the open side of the box body.

[0017] In summary, the welding nut leakage prevention detection device provided by the present utility model has at least the following beneficial effects: By using the proximity switch to detect the welding nut on the surface of the part to be tested, when the proximity switch does not detect the welding nut on the surface of the part to be tested, the driving component drives the movable guide groove to reach the second working position, so that the part to be tested slides down from the gap between the fixed guide groove and the movable guide groove, screening out the parts to be tested with the welding nut missed in welding, achieving the effect of preventing the missed detection of welding nuts. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a three-dimensional structural schematic diagram when the movable guide groove in the embodiment is in the first working position;

[0020] Figure 2 It is a front view when the movable guide groove in the embodiment is in the first working position;

[0021] Figure 3 It is a left view when the movable guide groove in the embodiment is in the first working position;

[0022] Figure 4 is Figure 3 a cross-sectional view taken along the line A-A in;

[0023] Figure 5 is Figure 4 an enlarged view of the position a in;

[0024] Figure 6 It is a front view when the movable guide groove in the embodiment is in the second working position;

[0025] Figure 7 It is a three-dimensional structural schematic diagram when the embodiment is detecting a part to be measured;

[0026] Figure 8 It is a three-dimensional structural schematic diagram of the part to be measured in the embodiment.

[0027] In the figure: machine base 1, fixed column 2, fixed guide groove 3, mounting bracket 4, proximity switch 5, movable guide groove 6, transmission arm 7, drive assembly 8, cylinder 801, connecting seat 802, transmission plate 9, locking bolt 10, support column 11, aggregate box 12, box door 13, part to be measured 14. Specific embodiments

[0028] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will further elaborate on the present invention in conjunction with the attached Figure 1-8 drawings and specific embodiments.

[0029] Please refer to Figure 1-8, A leak - proof detection device for welding nuts provided by the utility model includes: a machine base 1, a fixed guide groove 3, a mounting frame 4, a proximity switch 5, a movable guide groove 6 and a driving component 8. On the top of the machine base 1, there are fixed columns 2. The lower ends of the fixed columns 2 are fixedly connected to the top of the machine base 1. There are two fixed columns 2 arranged at intervals, and the right side of the fixed column 2 is flush with the right side of the machine base 1. The fixed guide groove 3 is fixedly installed on the machine base 1. The fixed guide groove 3 is inclined downward to the right. The right end of the fixed guide groove 3 is close to the machine base 1, and the left end is far from the machine base 1. The right end of the fixed guide groove 3 is located between the two fixed columns 2, and the front and back sides of the fixed guide groove 3 are respectively welded to the two fixed columns 2. The mounting frame 4 is fixedly installed on the fixed guide groove 3 and is located in the upper section of the fixed guide groove 3. The proximity switch 5 is fixedly installed on the mounting frame 4. The proximity switch 5 is used to detect the welding nuts on the part to be tested 14 in the fixed guide groove 3. Both the front and back sides of the movable guide groove 6 are fixedly connected with transmission arms 7. The two transmission arms 7 correspond to the two fixed columns 2 one by one. The right end of the transmission arm 7 is hinged to the upper end of the corresponding fixed column 2. The movable guide groove 6 has a first working position and a second working position. When the movable guide groove 6 is in the first working position, the left end of the movable guide groove 6 contacts the right end of the fixed guide groove 3 and forms a through - groove. When the movable guide groove 6 is in the second working position, the left end of the movable guide groove 6 is separated from the right end of the fixed guide groove 3, and a channel for the part to be tested 14 to pass through is formed at intervals. In the initial state, the movable guide groove 6 is in the first working position. When the proximity switch 5 detects that there is no welding nut on the part to be tested 14 in the fixed guide groove 3, the driving component 8 drives the movable guide groove 6 to reach the second working position.

[0030] During use, the part to be tested 14 is placed on the upper section of the fixed guide groove 3 and on the left side of the mounting frame 4. The part to be tested 14 is mainly a small - sized sheet - like part such as Figure 8 shown, such as parts with a linear, arc - shaped and inverted - U - shaped cross - section. Under the action of gravity, the part to be tested 14 slides downward, passes through the detection range of the proximity switch 5. When the proximity switch 5 detects that there is a welding nut on the upper side of the part to be tested 14, the movable guide groove 6 is in the first working position, and the part to be tested 14 slides downward into the movable guide groove 6 and then slides out to the lower right along the movable guide groove 6. When the proximity switch 5 detects that there is no welding nut on the surface of the part to be tested 14, the driving component 8 drives the movable guide groove 6 to reach the second working position, so that the part to be tested 14 slides down from the gap between the fixed guide groove 3 and the movable guide groove 6, screening out the part to be tested 14 with the welding nut missed in welding, achieving the effect of preventing the missed detection of welding nuts.

[0031] In some embodiments, preferably, the driving assembly 8 includes a cylinder 801, a connecting seat 802 and a controller. The cylinder 801 is fixedly installed on the machine base 1 through the connecting seat 802. The connecting seat 802 is sleeved on the cylinder 801. The connecting seat 802 has two feet, and both feet are fixedly connected to the top of the machine base 1. The cylinder 801 and the proximity switch 5 are both connected to the controller through wires. The controller can specifically adopt a PLC controller. A transmission plate 9 is fixedly connected to the transmission arm 7 on the front side. The transmission plate 9 is located on the front side of the transmission arm 7. During the switching process of the movable guide groove 6 between the first working position and the second working position, the lower side of the transmission plate 9 is always in sliding contact with the right end of the piston rod of the cylinder 801. The proximity switch 5 is used to detect whether there is a welding nut on the surface of the part to be tested 14. If it is detected that there is no welding nut on the part to be tested 14, the PLC controller controls the piston rod of the cylinder 801 to extend. The piston rod of the cylinder 801 jacks up the transmission plate 9, thereby driving the movable guide groove 6 to perform a circular motion around the hinge point of the transmission arm 7 and the fixed column 2, so that the left end of the movable guide groove 6 is separated from the right end of the fixed guide groove 3, and the part to be tested 14 will not enter the movable guide groove 6 and directly slides down from the right end of the movable guide groove 6, thereby separating the part to be tested 14 with the welding nut missing due to missed welding.

[0032] In order to facilitate the installation and disassembly of the proximity switch 5 and adjust the distance between the sensing head of the proximity switch 5 and the part to be tested 14, further, the mounting bracket 4 is in a gate shape. The two ends of the mounting bracket 4 are respectively fixedly connected to the front and rear sides of the fixed guide groove 3. An installation hole is provided in the middle of the mounting bracket 4, and the installation hole is perpendicular to the fixed guide groove 3. The proximity switch 5 is inserted into the installation hole. A threaded hole is provided on the side surface of the mounting bracket 4, and the threaded hole communicates with the installation hole. A locking bolt 10 is threadedly connected in the threaded hole, and one end of the locking bolt 10 abuts against the proximity switch 5.

[0033] In order to enhance the stability of the fixed guide groove 3, preferably, the front and rear sides of the right end of the fixed guide groove 3 are respectively welded and connected to the inner sides of the two fixed columns 2. A support column 11 is provided between the machine base 1 and the left end of the fixed guide groove 3. The two ends of the support column 11 are respectively fixedly connected to the top of the machine base 1 and the bottom of the fixed guide groove 3.

[0034] In order to facilitate the collection of the part to be tested 14 with the welding nut missing due to missed welding, further, a collection box 12 is fixedly connected to the right side surface of the machine base 1. The collection box 12 is located below the junction of the fixed guide groove 3 and the movable guide groove 6. The part to be tested 14 that directly falls from the right end of the fixed guide groove 3 directly falls into the collection box 12, thereby facilitating collection.

[0035] For the convenience of storing the controller, connection wires, etc., preferably, the base 1 is a box body with an opening on the front side thereof. A box door 13 is covered at the opening of the front side of the box body, and the right end of the box door 13 is hinged to the opening of the box body. The parts that need to be stored, such as the controller and connection wires, are placed into the box body and enclosed inside the box body through the box door 13, achieving the effect of convenient storage.

[0036] It should be noted that the words indicating directions in this article, such as up and down, etc., are all set in the direction of Figure 1 for the convenience of description and have no other specific meanings.

[0037] It should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that an article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such article or device. Without more limitations, an element defined by the statement "comprising a..." does not exclude the existence of another identical element in the article or device comprising the above elements.

[0038] Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A leak-proof detection device for welding nuts, characterized in that, Comprising: A machine base (1) with a fixed column (2) provided at the top; A fixed guide groove (3) fixedly installed on the machine base (1), the fixed guide groove (3) being inclined, one end of the fixed guide groove (3) being close to the machine base (1) and the other end being far from the machine base (1); A mounting bracket (4) fixedly installed on the fixed guide groove (3) and located in the upper section of the fixed guide groove (3); A proximity switch (5) fixedly installed on the mounting bracket (4), the proximity switch (5) being used to detect the welding nut on the part to be tested (14) in the fixed guide groove (3); A movable guide groove (6) fixedly connected with a transmission arm (7) on the outside, one end of the transmission arm (7) being hinged to the fixed column (2); the movable guide groove (6) has a first working position and a second working position. When the movable guide groove (6) is in the first working position, the movable guide groove (6) contacts the lower end of the fixed guide groove (3) and forms a through groove; when the movable guide groove (6) is in the second working position, the movable guide groove (6) is separated from the fixed guide groove (3) and a channel for the part to be tested (14) to pass through is formed at an interval; A driving assembly (8), when the proximity switch (5) detects that there is no welding nut on the part to be tested (14) in the fixed guide groove (3), the driving assembly (8) drives the movable guide groove (6) to reach the second working position.

2. The leak prevention detection device for a welding nut according to claim 1, wherein The driving assembly (8) includes a cylinder (801), a connecting seat (802) and a controller. The cylinder (801) is fixedly installed on the machine base (1) through the connecting seat (802), the controller is connected to the cylinder (801) and the proximity switch (5) respectively through lines, a transmission plate (9) is fixedly connected to the transmission arm (7), and during the switching process of the movable guide groove (6) between the first working position and the second working position, the lower side of the transmission plate (9) is always in sliding contact with the output end of the cylinder (801).

3. The leak prevention detection device for welding nuts according to claim 2, characterized in that, The mounting bracket (4) is in a door shape, both ends of the mounting bracket (4) are fixedly connected to both sides of the fixed guide groove (3), a mounting hole is provided in the middle of the mounting bracket (4), the proximity switch (5) is inserted into the mounting hole, a threaded hole is provided on the side of the mounting bracket (4), the threaded hole communicates with the mounting hole, and a locking bolt (10) is threadedly connected in the threaded hole, and one end of the locking bolt (10) abuts against the proximity switch (5).

4. The leak prevention detection device for welding nuts according to any one of claims 1-3, characterized in that, One end of the fixed guide groove (3) close to the machine base (1) is welded and connected to the inner side of the fixed column (2), a support column (11) is provided between the machine base (1) and the other end of the fixed guide groove (3), and both ends of the support column (11) are fixedly connected to the machine base (1) and the fixed guide groove (3) respectively.

5. The leak prevention detection device for welding nuts according to claim 4, characterized in that, An aggregate box (12) is fixedly connected to the side of the machine base (1), and the aggregate box (12) is located below the junction of the fixed guide groove (3) and the movable guide groove (6).

6. The leak prevention detection device for a welding nut according to claim 1, characterized in that, The machine base (1) is a box body, the side surface of the box body is open, and a box door (13) is covered at the opening of the side surface of the box body.

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