A projection weld nut detection device

Abstract

This invention relates to the technical field of nut welding position and size detection equipment, specifically disclosing a projection weld nut detection device, including a detection rod, a first guide member, a first sliding member, a first reset member, a second guide member, and a drive mechanism. The first guide member has a limiting hole. The second guide member is connected to one side of the first guide member. One end of the detection rod is connected to one end of the first sliding member, and the other end of the first sliding member is connected to the drive mechanism. The drive mechanism is slidably guided by the second guide member. The other end of the detection rod passes through the limiting hole. The first reset member is connected between the first sliding member and the first guide member, and is used to reset the first sliding member after it slides along the first guide member. This device can improve the detection efficiency of projection weld nuts and reduce labor.

Description

Technical Field

[0001] This invention relates to the field of rapid detection technology for slot size, specifically a device for detecting projection weld nuts. Background Technology

[0002] Projection weld nuts are widely used in automotive frame welding. During automated welding, it is necessary to quickly detect the position and inner hole size of the projection weld nuts to ensure that the position of the projection weld nuts and the size of the nut holes are correct after welding, so as to facilitate the next step of assembly, painting and other operations.

[0003] Traditional inspection tools such as rulers, vernier calipers, special gauges, and coordinate measuring machines are commonly used to inspect the position and inner hole size of existing projection weld nuts. These tools require multiple measurements, resulting in low inspection efficiency and high labor intensity. Summary of the Invention

[0004] The purpose of this invention is to provide a projection weld nut inspection device to solve the problems of low inspection efficiency and high labor intensity in traditional projection weld nut inspection.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A projection weld nut detection device includes a detection rod, a first guide member, a first sliding member, a first reset member, a second guide member, and a driving mechanism. The first guide member has a limiting hole. The second guide member is connected to one side of the first guide member. One end of the detection rod is connected to one end of the first sliding member, and the other end of the first sliding member is connected to the driving mechanism. The driving mechanism is slidably guided by the second guide member. The other end of the detection rod passes through the limiting hole. The first reset member is connected between the first sliding member and the first guide member, and is used to reset the first sliding member after it slides along the first guide member.

[0007] In a further embodiment, the first guide member includes a first connecting seat, the limiting hole is disposed in the middle of the first connecting seat, the first connecting seat is provided with a guide rail on the side near the first sliding member, the first sliding member has a groove and is slidably connected to the guide rail through the groove.

[0008] In a further embodiment, the first sliding member includes a first wedge-shaped slider and a first connecting rod connected to each other. The diameter of the first connecting rod decreases sequentially. The limiting hole includes a T-shaped hole with a sequentially decreasing diameter. The lower part of the first connecting rod is slidably connected to the lower part of the T-shaped hole. The first reset member includes a first spring, which is sleeved on the upper part of the first connecting rod and located between the first wedge-shaped slider and the stepped surface of the T-shaped hole.

[0009] In a further embodiment, the driving mechanism includes a second sliding member and a second reset member, wherein the second reset member is connected between the second sliding member and the second guide member, and is used to reset the second sliding member after sliding.

[0010] In a further embodiment, the second sliding member includes a second wedge-shaped slider and a second connecting rod connected to each other. The second wedge-shaped slider and the first wedge-shaped slider are connected by their respective guide slopes / sliding connections. The second guide member includes a second connecting seat, which is provided with a U-shaped limiting groove and a guide groove from top to bottom, and a step is provided between the two. Both sides of the second wedge-shaped slider and the first wedge-shaped slider are limited to slide within the guide groove. The second reset member includes a second spring. The second connecting rod is provided with a shaft protrusion. The second spring is sleeved outside the second connecting rod and is located between the shaft protrusion and the U-shaped limiting groove.

[0011] In a further embodiment, the length of the guide groove is equal to the sum of the lateral lengths of the first wedge slider and the second wedge slider.

[0012] In a further embodiment, the guide slopes of both the first and second wedge sliders are connected to adjacent surfaces via arc-shaped surfaces.

[0013] In a further embodiment, the cross-section of the first wedge-shaped slider in the sliding direction is a right-angled trapezoid.

[0014] In a further embodiment, the cross-section of the second wedge-shaped slider in the sliding direction is a right-angled trapezoid.

[0015] A further embodiment also includes a mounting base, which is connected to a first guide member and / or a second guide member.

[0016] The beneficial effects of this invention are:

[0017] This invention, through the design of a detection rod, a first reset component, a second guide component, a first guide component, and a driving mechanism, enables the detection rod to automatically reset after extension, thus eliminating the need for energy to retract it and improving energy utilization efficiency. At the same time, the first and second guide components can guide the extension direction of the detection rod and the driving direction of the driving mechanism, thereby ensuring stable extension of the detection rod and improving detection stability.

[0018] The present invention improves the positional accuracy of the detection rod by designing the first guide member, thereby improving the detection accuracy of the projection weld nut.

[0019] The present invention, through the design of the drive mechanism, eliminates the need to consider the driving error of drive components such as cylinders, and is also easy to arrange, thereby improving the detection accuracy of the detection rod.

[0020] This invention relates to a fixed testing mechanism, which solves the problems of traditional testing mechanisms that require repeated flipping during operation, are prone to breakage, and require repeated repairs. This mechanism improves the ease of operation, testing accuracy, and reduces maintenance costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is an exploded schematic diagram of a projection weld nut detection device according to an embodiment of the present invention;

[0023] Figure 2 This is a cross-sectional view of a projection weld nut detection device according to an embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional view of another projection weld nut detection device in an embodiment of the present invention;

[0025] In the diagram: 1. Detection rod; 2. First guide member; 201. Limiting hole; 21. First connecting seat; 22. Guide slide rail; 3. First sliding member; 31. First wedge-shaped slider; 311. Guide slope; 32. First connecting rod; 4. First reset member; 41. First spring; 5. Second guide member; 51. Second connecting seat; 511. U-shaped limiting groove; 512. Guide slide groove; 6. Drive mechanism; 61. Second sliding member; 611. Second wedge-shaped slider; 6111. Guide slope; 612. Second connecting rod; 6121. Shaft protrusion; 62. Second reset member; 621. Second spring; 7. Mounting seat. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] like Figure 1As shown, a projection weld nut detection device includes a detection rod 1, a first guide member 2, a first sliding member 3, a first reset member 4, a second guide member 5, and a drive mechanism 6. The first guide member 2 is provided with a limiting hole 201. The second guide member 5 is connected to one side of the first guide member 2. One end of the detection rod 1 is connected to one end of the first sliding member 3, and the other end of the first sliding member 3 is connected to the drive mechanism 6. The drive mechanism 6 is slidably guided to the second guide member 5. The other end of the detection rod 1 passes through the limiting hole 201. The first reset member 4 is connected between the first sliding member 3 and the first guide member 2 and is used to reset the first sliding member 3 after sliding along the first guide member 2.

[0028] Its working principle or implementation method is as follows:

[0029] The testing mechanism is installed and fixed on the fixture. After the testing components are placed and fixed on the overall fixture, the first sliding member 3 is driven to slide on the first guide member 2 by the driving mechanism 6. The first guide member 2 provides sliding guidance and limit for the first sliding member 3. The first sliding member 3 drives the testing rod 1 to extend. If the front end of the testing rod 16 smoothly enters the projection weld nut, the accuracy of the projection weld nut meets the standard. Otherwise, the dimensional accuracy of the welding position of the projection weld nut does not meet the standard. After the measurement is completed, the first reset member 4 drives the first sliding member 3 and the testing rod 1 to retract and reset, and extend again for the next test.

[0030] The drive mechanism 6 can be an elastic telescopic mechanism, such as a telescopic top rod.

[0031] Based on the above working principle, some preferred embodiments or implementation methods are provided, such as... Figure 1 As shown, the first guide member 2 includes a first connecting seat 21, a limiting hole 201 disposed in the middle of the first connecting seat 21, and a guide rail 22 disposed on the side of the first connecting seat 21 near the first sliding member 3. The first sliding member 3 has a sliding groove and is slidably connected to the guide rail 22 through the sliding groove. By sliding and guiding through the guide rail 22 and limiting through the limiting hole 201, the first sliding member 3 can have high positional accuracy in the sliding direction, so that the detection rod 1 has high positioning accuracy.

[0032] The first sliding member 3 includes a first wedge-shaped slider 31 and a first connecting rod 32 connected to each other. The diameter of the first connecting rod 32 decreases sequentially. The limiting hole 201 includes a T-shaped hole with a sequentially decreasing diameter. The lower part of the first connecting rod 32 is slidably connected to the lower part of the T-shaped hole. The first resetting member 4 includes a first spring 41, which is sleeved on the upper part of the first connecting rod 32 and located between the first wedge-shaped slider 31 and the stepped surface of the T-shaped hole. This facilitates the installation of the first spring 41, allowing the first spring 41 to act as a preload to drive the first wedge-shaped slider 31 and the second wedge-shaped slider 61 to abut against each other.

[0033] The first reset component 4 can also be an elastically compressible rubber sleeve or a corrugated sleeve composed of rubber springs.

[0034] Telescopic push rods can make lateral arrangements of telescopic cylinders inconvenient. Therefore, in some embodiments, the drive mechanism 6 includes a second sliding member 61 and a second reset member 62. The second reset member 62 is connected between the second sliding member 61 and the second guide member 5 and is used to reset the second sliding member 61 after sliding. This ensures the accuracy of the drive end when the drive mechanism 6 drives the first sliding member 3, and the second reset member 62 provides an automatic reset function for the second sliding member 61, ensuring that the first sliding member 3 and the second sliding member 61 can always be pressed together.

[0035] The second sliding member 61 includes a second wedge-shaped slider 611 and a second connecting rod 612 connected to each other. The second wedge-shaped slider 611 and the first wedge-shaped slider 31 are slidably connected by a guide inclined surface. Through the guide inclined surface, the second wedge-shaped slider 611 can drive the first wedge-shaped slider 31 to slide along the guide rail 22 towards the limiting hole 201. At this time, only a pressing component such as a cam mechanism needs to be matched in the vertical direction. It is not necessary to consider the stroke and driving end accuracy of the cam mechanism too much, which is convenient for the vertical configuration of pressing components and other power mechanisms. The guide member 5 includes a second connecting seat 51, which has a U-shaped limiting groove 511 and a guide slide groove 512 arranged sequentially from top to bottom, with a step 513 between them. The second wedge slider 611 and the first wedge slider 31 are both limited and slid within the guide slide groove 512 on both sides. The second reset member 62 includes a second spring 621, and a shaft protrusion 6121 is provided on the second connecting rod 612. The second spring 621 is sleeved on the second connecting rod 612 and is located between the shaft protrusion 6121 and the U-shaped limiting groove 511. The guide slide groove 512 not only meets the sliding guidance requirements of the second wedge block, but also provides a limit for the sliding stroke of the first wedge block, facilitating the selection and installation of the first spring 41.

[0036] The length of the guide groove 512 is equal to the sum of the lateral lengths of the first wedge slider 31 and the second wedge slider 611. This allows the sliding distance of the first wedge slider 31 to match the sliding distance of the second wedge slider 611, ensuring that their contact surfaces can abut together, thus enabling the second wedge slider 611 to drive the first wedge slider 31.

[0037] The guide slopes of the first wedge slider 31 and the second wedge slider 611 are both connected to the adjacent surfaces through arc-shaped surfaces. This ensures that the first wedge slider 31 and the second wedge slider 611 will not get stuck when they come into contact and drive each other.

[0038] The cross-section of the first wedge slider 31 in the sliding direction is a right-angled trapezoid. The cross-section of the second wedge slider 611 in the sliding direction is a right-angled trapezoid. The structure of the first wedge slider 31 and the second wedge slider 611 is simple, can meet the driving requirements of the second wedge slider 611 on the first wedge slider 31, and ensures that the driving is through surface contact, which can provide driving stability.

[0039] The aforementioned projection weld nut inspection device also includes a mounting base 7, which is connected to the first guide member 2 and / or the second guide member 5. The mounting base 7 is integrated into inspection equipment such as gauges. Figure 2 and Figure 3 As shown, the mounting base 7 can be processed into different mounting platforms according to the characteristics of the parts being inspected, thus solving the problems of mechanism installation and inspection space limitations.

[0040] In use, the mounting base 7 is installed on the testing equipment, so that the testing rod 1 is facing the position where the projection weld nut is installed on the workpiece. The telescopic cylinder drives the second connecting rod 612 and the second wedge slider 611 to move downward. Through the inclined surface where the second wedge slider 611 and the first wedge slider 31 are in contact, the thrust is converted from longitudinal to lateral force, pushing the first connecting rod 32 and the testing rod 1 to extend out of the limiting hole 201. If it is inserted into the projection weld nut and extends out of the projection weld nut, it will be detected by some testing mechanisms, such as the photoelectric sensor set on the rear side of the projection weld nut. If the projection weld nut welding position accuracy or inner hole size accuracy meets the standard, it will not be detected. If it does not extend, it will not be detected, and the projection weld nut welding accuracy does not meet the standard. After the test is completed, the telescopic cylinder retracts, and the second wedge slider 611 will be driven to the initial non-extended position under the action of the second spring 621. At the same time, the testing rod 1 will be brought back to the original non-extended position under the action of the first spring 41.

[0041] It should be noted that the terms "first," "second," etc., used in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," "longitudinal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings.

[0042] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms 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.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A device for detecting projection weld nuts, characterized in that, The device includes a detection rod (1), a first guide (2), a first sliding member (3), a first reset member (4), a second guide (5), and a driving mechanism (6). The first guide (2) has a limiting hole (201). The second guide (5) is connected to one side of the first guide (2). One end of the detection rod (1) is connected to one end of the first sliding member (3). The other end of the first sliding member is connected to the driving mechanism (6). The driving mechanism (6) is slidably guided to the second guide (5). The other end of the detection rod (1) passes through the limiting hole (201). The first reset member (4) is connected between the first sliding member (3) and the first guide (2) and is used to reset the first sliding member (3) after it slides along the first guide (2).

2. The projection weld nut detection device according to claim 1, characterized in that, The first guide member (2) includes a first connecting seat (21), the limiting hole (201) is located in the middle of the first connecting seat (21), the first connecting seat (21) is provided with a guide rail (22) on the side near the first sliding member (3), the first sliding member (3) has a sliding groove, and is slidably connected to the guide rail (22) through the sliding groove.

3. The projection weld nut detection device according to claim 1, characterized in that, The first sliding member (3) includes a first wedge-shaped slider (31) and a first connecting rod (32) connected to each other. The diameter of the first connecting rod (32) decreases sequentially. The limiting hole (201) includes a T-shaped hole with a decreasing diameter. The lower part of the first connecting rod (32) is slidably connected to the lower part of the T-shaped hole. The first reset member (4) includes a first spring (41). The first spring (41) is sleeved on the upper part of the first connecting rod (32) and is located between the first wedge-shaped slider (31) and the step surface of the T-shaped hole.

4. The projection weld nut detection device according to claim 3, characterized in that, The driving mechanism (6) includes a second sliding member (61) and a second reset member (62). The second reset member (62) is connected between the second sliding member (61) and the second guide member (5) and is used to reset the second sliding member (61) after it slides.

5. The projection weld nut detection device according to claim 4, characterized in that, The second sliding member (61) includes a second wedge slider (611) and a second connecting rod (612) connected to each other. The second wedge slider (611) and the first wedge slider (31) are slidably connected through their respective guide slopes (6111 / 311). The second guide member (5) includes a second connecting seat (51). The second connecting seat (51) is provided with a U-shaped limiting groove (511) and a guide groove (512) from top to bottom, and a step (513) is provided between the two. The second wedge slider (611) and the first wedge slider (31) are both limited to sliding in the guide groove (512) on both sides. The second reset member (62) includes a second spring (621). The second connecting rod (612) is provided with a shaft protrusion (6121). The second spring (621) is sleeved outside the second connecting rod (612) and is located between the shaft protrusion (6121) and the U-shaped limiting groove (511).

6. The projection weld nut detection device according to claim 5, characterized in that, The length of the guide groove (512) is equal to the sum of the lateral lengths of the first wedge slider (31) and the second wedge slider (611).

7. The projection weld nut detection device according to claim 5, characterized in that, The guide slopes (6111 / 311) of the first wedge slider (31) and the second wedge slider (611) are both connected to the adjacent surfaces through arc surfaces.

8. The projection weld nut detection device according to claim 5, characterized in that, The cross-section of the first wedge-shaped slider (31) in the sliding direction is a right trapezoid.

9. A projection weld nut detection device according to claim 5, characterized in that, The cross-section of the second wedge slider (611) in the sliding direction is a right trapezoid.

10. The projection weld nut detection device according to claim 1, characterized in that, It also includes a mounting base (7) connected to a first guide (2) and / or a second guide (5).

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