Nut pneumatic detection device

Abstract

The utility model discloses a nut pneumatic detection device relates to the technical field of automobile manufacturing, it includes backplate still, including sliding axle and positioning pin, the front of backplate is from top to bottom in proper order is provided with connecting block and mechanical valve, sliding axle is inserted in connecting block vertically, and the lower extreme of sliding axle is connected with the trigger rod of mechanical valve after projecting connecting block, and the upper extreme of sliding axle is connected with the lower extreme of positioning pin after projecting connecting block. The utility model discloses simple structure, responds quickly, and the high reliability, can prevent the fixture clamping when no nut, prevents the defective plate piece of the defect of the nut of welding from the source.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, specifically a pneumatic nut detection device. Background Technology

[0002] In the automotive body-in-white welding process, numerous welding nuts are typically embedded in the body panels for subsequent assembly. These panels are positioned and clamped in welding fixtures. If operators miss or misplace panels, or if nuts on panels fall off during transport, the fixtures will still clamp and weld as usual, leading to serious quality defects. Such problems are often only discovered in subsequent assembly processes or even during vehicle inspection, resulting in extremely high rework costs.

[0003] Currently, the common method for inspecting pneumatically controlled fixtures is manual inspection after welding. This method is inefficient and cannot fundamentally prevent defective parts from flowing into the next process. Therefore, there is an urgent need for a device integrated inside the welding fixture that can detect and control the presence of nuts in real time before the clamping action occurs. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a pneumatic nut detection device with a simple structure, rapid response, and high reliability; it can automatically prevent the clamp from tightening when there is no nut, thus preventing defective plates with missing welded nuts from being produced at the source.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a nut pneumatic detection device, including a back plate, a sliding shaft, and a positioning pin; a connecting block and a mechanical valve are arranged sequentially from top to bottom on the front of the back plate; the sliding shaft is vertically inserted into the connecting block, and the lower end of the sliding shaft extends out of the connecting block and is connected to the trigger rod of the mechanical valve, and the upper end of the sliding shaft extends out of the connecting block and is connected to the lower end of the positioning pin.

[0006] A further improvement is that the back plate includes a plate body, the plate body has several fixing holes, and the upper middle part of the plate body extends upward to form an extension part, and a waist hole is provided on the extension part. The connecting block is installed in the waist hole and can be adjusted up and down along the waist hole.

[0007] A further improvement is that the front center of the plate protrudes forward to form a first boss, and the first boss is provided with a plurality of first connection holes for connecting mechanical valves.

[0008] A further improvement is that the connecting block includes a block body, and the front center of the block body protrudes forward to form a second boss, which has a through hole for the sliding shaft to pass through.

[0009] A further improvement is that the block is provided with several second connecting holes for connecting to the back plate; the front side of the second boss is provided with a limiting hole that communicates with the through hole.

[0010] A further improvement is that a graphite bushing adapted to the sliding shaft is provided inside the through hole.

[0011] A further improvement is that: limit grooves are provided at both ends of the sliding shaft, and shaft clips are provided in the limit grooves to limit the stroke of the sliding shaft.

[0012] A further improvement is that the upper end of the sliding shaft is provided with a connecting rod for connecting the positioning pin, and the lower end of the sliding shaft is provided with a third connecting hole for connecting the trigger rod.

[0013] A further improvement is that the lower end of the positioning pin is provided with an expansion portion, and the bottom of the expansion portion is provided with a fourth connecting hole for connecting the sliding shaft.

[0014] A further improvement is that the mechanical valve includes a valve body, a trigger rod is provided on the top of the valve body, and air pipes are provided on the left and right sides of the valve body respectively.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. In this utility model, the detection function is directly integrated into the welding fixture, and the detection is completed instantly after the plate is placed and before the clamping action occurs. If there is no nut, the device will not be triggered, the air passage of the fixture will be blocked, and clamping will not be possible, thus fundamentally avoiding welding operations on defective plates.

[0017] 2. This utility model adopts a pure pneumatic mechanical structure without complex electrical components, making it particularly suitable for the harsh environment of welding workshops with high dust and strong electromagnetic interference. It is stable in operation and has a long service life.

[0018] 3. This utility model is composed of standard pneumatic components and mechanical parts, with a compact structure, convenient manufacturing, installation and maintenance, and a cost far lower than electronic detection solutions such as vision sensors or electromagnetic sensors.

[0019] 4. In this utility model, the device status is clearly defined (whether the detection rod is raised), making it easy for workers and maintenance personnel to understand its working principle and perform rapid fault diagnosis and debugging. Attached Figure Description

[0020] Figure 1 This is a perspective view of the nut pneumatic detection device in an embodiment of this utility model;

[0021] Figure 2 This is a front view of the nut pneumatic detection device in an embodiment of this utility model;

[0022] Figure 3This is a top view of the nut pneumatic detection device in an embodiment of this utility model;

[0023] Figure 4 This is a cross-sectional view of the nut pneumatic detection device in an embodiment of this utility model;

[0024] Figure 5 This is a front view of the back panel in an embodiment of the present utility model;

[0025] Figure 6 This is a side view of the back plate in an embodiment of the present utility model;

[0026] Figure 7 This is a front view of the connecting block in an embodiment of this utility model;

[0027] Figure 8 This is a side view of the connecting block in an embodiment of the present utility model;

[0028] Figure 9 This is a schematic diagram of the sliding shaft in an embodiment of the present invention;

[0029] Figure 10 This is a schematic diagram of the positioning pin in an embodiment of the present utility model;

[0030] Figure 11 This is a schematic diagram of the mechanical valve in an embodiment of the present invention.

[0031] Figure label:

[0032] 1-Back plate; 11-Plate body; 12-Extension; 13-First boss; 14-Fixing hole; 15-Waist hole; 16-First connecting hole;

[0033] 2-Connecting block; 21-Block body; 22-Second boss; 23-Through hole; 24-Second connecting hole; 25-Limiting hole;

[0034] 3-Sliding shaft; 31-Connecting rod; 32-Third connecting hole; 33-Limiting groove;

[0035] 4-Positioning pin; 41-Expansion part; 42-Fourth connecting hole;

[0036] 5-Mechanical valve; 51-Valve body; 52-Actuating rod; 53-Gas pipe;

[0037] 6-axis card;

[0038] 7-Graphite bushing. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0040] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0041] 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. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0042] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and beneficial effects of the present invention clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0043] See Figures 1-4 As shown, this utility model embodiment provides a nut pneumatic detection device, including a back plate 1, a sliding shaft 3, and a positioning pin 4; the front of the back plate 1 is provided with a connecting block 2 and a mechanical valve 5 from top to bottom; the sliding shaft 3 is vertically inserted into the connecting block 2, and the lower end of the sliding shaft 3 extends out of the connecting block 2 and is connected to the trigger rod 52 of the mechanical valve 5, and the upper end of the sliding shaft 3 extends out of the connecting block 2 and is connected to the lower end of the positioning pin 4.

[0044] See Figures 5-6 As shown, the back plate 1 includes a plate body 11, which has several fixing holes 14. The upper middle part of the plate body 11 extends upward to form an extension 12, and the extension 12 has a waist hole 15. The connecting block 2 is installed in the waist hole 15 and can be adjusted up and down along the waist hole 15. Specifically, the front middle part of the plate body 11 protrudes forward to form a first boss 13, and the first boss 13 is provided with several first connecting holes 16 for connecting the mechanical valve 5.

[0045] See Figures 7-8As shown, the connecting block 2 includes a block body 21. A second boss 22 protrudes forward from the center of the front side of the block body 21, and this second boss 22 has a through hole 23 for the sliding shaft 3 to pass through. Specifically, the block body 21 is provided with several second connecting holes 24 for connecting to the back plate 1; the front side of the second boss 22 is provided with a limiting hole 25 communicating with the through hole 23. A graphite bushing 7 adapted to the sliding shaft 3 is provided inside the through hole 23 for lubrication, preventing jamming, and improving the sensitivity of the device.

[0046] See Figure 9 As shown, limit grooves 33 are provided at both ends of the sliding shaft 3, and shaft clips 6 are provided in the limit grooves 33 to limit the stroke of the sliding shaft 3. Specifically, a connecting rod 31 for connecting the positioning pin 4 is provided at the upper end of the sliding shaft 3, and a third connecting hole 32 for connecting the trigger rod 52 is provided at the lower end of the sliding shaft 3.

[0047] See Figure 10 As shown, the lower end of the locating pin 4 is provided with an expansion part 41, and the bottom of the expansion part 41 is provided with a fourth connecting hole 42 for connecting the sliding shaft 3. The locating pin can be replaced according to the size of the nut to be tested.

[0048] See Figure 11 As shown, the mechanical valve 5 includes a valve body 51, a trigger rod 52 is provided on the top of the valve body 51, and air pipes 53 are respectively provided on the left and right sides of the valve body 51. In this embodiment, the mechanical valve 5 is a VM130-01-00A mechanical valve manufactured by SMC Corporation.

[0049] The working principle of this utility model is as follows:

[0050] Install this device below the nut to be inspected. When there is a nut on the plate, the nut will press down the locating pin, triggering the mechanical valve via the sliding shaft. At this time, the mechanical valve is vented, and the fixture can proceed to the next step. If there is no nut on the plate, the spring force of the mechanical valve itself will lift the sliding shaft, and the mechanical valve will be in the closed state, i.e., not vented, and the fixture will not have the power to proceed to the next step.

[0051] In the description of this specification, references to terms such as "an embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. Illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] Based on the above description of the structure and principle, those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. Improvements and substitutions based on this utility model using techniques known in the art all fall within the protection scope of this utility model and should be defined by the claims.

Claims

1. A pneumatic nut detection device, comprising a back plate (1), characterized in that: It also includes a sliding shaft (3) and a positioning pin (4); the front of the back plate (1) is provided with a connecting block (2) and a mechanical valve (5) from top to bottom; the sliding shaft (3) is vertically inserted into the connecting block (2), and the lower end of the sliding shaft (3) extends out of the connecting block (2) and is connected to the trigger rod (52) of the mechanical valve (5), and the upper end of the sliding shaft (3) extends out of the connecting block (2) and is connected to the lower end of the positioning pin (4).

2. The pneumatic nut detection device according to claim 1, characterized in that: The back plate (1) includes a plate body (11), which has several fixing holes (14). The upper middle part of the plate body (11) extends upward to form an extension (12), and a waist hole (15) is provided on the extension (12). The connecting block (2) is installed in the waist hole (15) and its height can be adjusted up and down along the waist hole (15).

3. The pneumatic nut detection device according to claim 2, characterized in that: The front center of the plate (11) protrudes forward to form a first boss (13), and the first boss (13) is provided with a plurality of first connection holes (16) for connecting the mechanical valve (5).

4. The pneumatic nut detection device according to claim 1, characterized in that: The connecting block (2) includes a block (21), and the front center of the block (21) protrudes forward to form a second boss (22), which has a through hole (23) for the sliding shaft (3) to pass through.

5. The pneumatic nut detection device according to claim 4, characterized in that: The block (21) is provided with a plurality of second connecting holes (24) for connecting the back plate (1); the front side of the second boss (22) is provided with a limiting hole (25) communicating with the through hole (23).

6. The pneumatic nut detection device according to claim 4, characterized in that: A graphite bushing (7) adapted to the sliding shaft (3) is provided inside the through hole (23).

7. The pneumatic nut detection device according to claim 1, characterized in that: The sliding shaft (3) is provided with limit grooves (33) at both ends, and a shaft clip (6) is provided in the limit groove (33) to limit the stroke of the sliding shaft (3).

8. The pneumatic nut detection device according to claim 1, characterized in that: The upper end of the sliding shaft (3) is provided with a connecting rod (31) for connecting the positioning pin (4), and the lower end of the sliding shaft (3) is provided with a third connecting hole (32) for connecting the trigger rod (52).

9. The pneumatic nut detection device according to claim 1, characterized in that: The lower end of the positioning pin (4) is provided with an expansion part (41), and the bottom of the expansion part (41) is provided with a fourth connecting hole (42) for connecting the sliding shaft (3).

10. The pneumatic nut detection device according to claim 1, characterized in that: The mechanical valve (5) includes a valve body (51), a trigger rod (52) is provided on the top of the valve body (51), and air pipes (53) are provided on the left and right sides of the valve body (51).

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