Detection positioning clamp

Abstract

The utility model relates to the technical field of positioning fixtures, in particular to a detection positioning fixture. Comprising an annular base, a containing cavity is formed in the base, a set of clamping parts are arrayed on the outer side in the circumferential direction of the annular base and connected with the annular base in a pivot mode, the annular body is used for clamping a thin plate, a movable shaft is movably arranged in the containing cavity, and the outer side face of the movable shaft is provided with an inclined face inclining in the axial direction and a set of notch parts corresponding to the clamping parts. One end is hinged to the notch part and the other end extends out; the clamp further comprises a set of ejector rods, the two ends of each ejector rod abut against the corresponding clamping part and the corresponding inclined face, a clamping part pivot is located between the corresponding connecting rod and the corresponding ejector rod, in addition, an elastic piece is arranged between the clamping part and the annular base, the movable shaft axially moves to drive the connecting rods and the ejector rods and push the clamping parts to rotate, accurate clamping and releasing of the annular body of the thin plate are achieved, clamping force is uniform, and the clamping effect is good. The sheet is prevented from being damaged, and accurate and stable positioning during detection is ensured.

Description

Technical Field

[0001] This utility model relates to the field of positioning fixture technology, and in particular to a detection positioning fixture. Background Technology

[0002] In the testing process of thin sheet materials, precise clamping and positioning is the key to ensuring the accuracy of test results. Because of their thinness, thin sheet materials are easily affected by external forces during the testing process, which can cause displacement, deformation, etc., thus interfering with the testing accuracy.

[0003] Currently, in existing technologies, the clamping and positioning of thin sheet metal for inspection uses mechanical grippers for direct clamping. This type of traditional inspection and positioning fixture has many obvious drawbacks. On the one hand, due to the thinness of the sheet metal, it is difficult for the mechanical grippers to ensure that the applied clamping force is evenly distributed on the edge of the sheet metal. Excessive clamping force in some areas can easily lead to local deformation or even damage of the sheet metal, while insufficient clamping force can cause the sheet metal to loosen or shift during inspection, seriously affecting the accuracy of the inspection results. Therefore, there is an urgent need for an inspection and positioning fixture to solve the above problems. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a detection and positioning fixture, which solves the technical problem that thin sheet materials are easily deformed and damaged during the detection and clamping process, resulting in inaccurate detection results.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A detection and positioning fixture for clamping and positioning thin sheet materials before detection, comprising:

[0007] An annular seat, wherein the annular seat has a cavity;

[0008] A set of clamping parts, the set of clamping parts being arranged in a circumferential array along the outer side of the annular seat, the clamping parts being pivotally connected to the annular seat, the thin sheet material comprising: an annular body, the set of clamping parts being used to clamp and position the annular body;

[0009] A movable shaft is movably disposed within a cavity. The outer surface of the movable shaft is provided with: an inclined surface that is inclined along the axial direction of the movable shaft and a set of notches. The inclined surface is arranged along the circumference of the movable shaft, and the set of notches is arranged one-to-one with a set of clamping parts along the circumference of the movable shaft.

[0010] A set of connecting rods is movably mounted on an annular seat. The ends of the connecting rods are respectively hinged to a set of notches. The end of the connecting rod away from the moving shaft extends axially out of the annular seat.

[0011] A set of push rods is movably mounted on an annular seat. The two ends of the push rods abut against the clamping part and the inclined surface, respectively. The pivot of the clamping part and the annular seat is located between the connecting rod and the push rod.

[0012] An elastic element is provided between the clamping part and the annular seat, and the two ends of the elastic element are respectively connected to the clamping part and the annular seat.

[0013] Based on the above structure, the principle of the detection and positioning fixture is as follows: The axial movement of the moving shaft causes the connecting rod and the push rod to move, pushing the clamping part to rotate around the pivot between the clamping part and the annular seat. This causes a set of clamping parts to contract or expand radially along the annular seat, thereby achieving the function of clamping or releasing the annular body. When clamping the annular body, a set of clamping parts is in the expanded state, with one end of the push rod near the moving shaft located at the bottom of the inclined plane. The inclination direction of the inclined plane is such that when the moving shaft moves axially downwards, the inclined plane pushes the push rod to extend radially out of the annular seat. The push rod, moving away from the moving shaft, pushes the clamping part to rotate around the pivot, causing the clamping part to contract radially inwards towards the annular seat, thus clamping the annular body. At this time, because the connecting rod is hinged to the moving shaft through a notch, the axial movement of the moving shaft drives the connecting rod to move, further adjusting the position of the clamping part and ensuring that the clamping part is aligned with the annular body. The clamping force is evenly distributed. When the ring body needs to be released, the moving shaft returns to its axial position, and the connecting rod axially abuts against the outside of the clamping part, causing the clamping part to rotate in the opposite direction around its pivot. At this time, the clamping part pushes the push rod to move, and the end of the push rod away from the clamping part retracts and returns to its original position along the inclined plane, no longer applying thrust to the clamping part. The clamping part unfolds, and under the action of the elastic element, it rotates in the opposite direction around the pivot, unfolding radially outward of the ring seat, thereby releasing the ring body. The design of the elastic element is to prevent the clamping part from unfolding too much and to prevent the ring body from falling off the clamping part. When the clamping part unfolds outward during the release process, the elastic element is stretched and generates a restoring force, limiting the unfolding angle of the clamping part and ensuring that the clamping part does not unfold excessively and cause the ring body to fall off. At the same time, the elastic element is compressed during the clamping process, providing additional clamping force to the clamping part and enhancing the stability of the clamping.

[0014] Furthermore, in one detection and positioning fixture of this application, an elongated hole is provided on the side of the connecting rod near the clamping part, and a pin is mounted on the annular seat. The pin is installed in the elongated hole, and when the moving shaft moves axially, the pin slides in the elongated hole, and the connecting rod rotates around the pin. As a preferred embodiment of this application, the elongated hole and the pin work together to not only guide and limit the movement of the connecting rod, but also realize the radial movement of the clamping part through the rotation of the connecting rod, adjust the position of the clamping part, ensure the uniform distribution of clamping force, and enhance the flexibility and adaptability of the mechanism.

[0015] Furthermore, in one detection and positioning fixture of this application, each of the clamping portions has a receiving groove at the end away from the annular seat, and the receiving groove is used to accommodate the edge of the annular body. As a preferred embodiment of this application, the design of the receiving groove in the detection and positioning fixture of this application can cooperate with the edge of the annular body to ensure that the annular body is accurately positioned during clamping, avoid damage to the annular body during clamping, and ensure that the annular body will not accidentally fall off during detection.

[0016] Furthermore, in one detection and positioning fixture of this application, a buffer protective layer is provided on the inner sidewall of the receiving groove. As a preferred embodiment of this application, the buffer protective layer is used to prevent collision between the annular body and the sidewall of the receiving groove during the detection and clamping process, thereby preventing damage to the annular body.

[0017] Furthermore, a detection positioning fixture according to this application further includes: a frame, on which a mounting plate is provided, the mounting plate having a mounting countersunk corresponding to the annular seat, the annular seat being installed within the mounting countersunk, and the annular seat having a radially extending limiting protrusion, the limiting protrusion being abutting against the sidewall of the mounting countersunk in both the axial and radial directions of the annular seat. As a preferred embodiment of this application, in this detection positioning fixture, the annular seat is installed within the mounting countersunk, and the limiting protrusion of the annular seat abuts against the sidewall of the mounting countersunk in both the axial and radial directions. This design effectively positions the annular seat on the mounting plate, preventing displacement of the annular seat during detection, thereby ensuring stable clamping and positioning of the annular body, avoiding impact on detection results due to annular seat movement, and facilitating accurate reinstallation of the annular seat after removal from the mounting plate.

[0018] Furthermore, in a detection positioning fixture of this application, the limiting protrusion extends radially and is provided with a set of limiting protrusions, the set of limiting protrusions being evenly spaced along the circumference of the limiting protrusion. The mounting plate is provided with notches corresponding to the limiting protrusions, the notches being used to accommodate the limiting protrusions. As a preferred embodiment of this application, in a detection positioning fixture of this application, the limiting protrusions and the corresponding notches on the mounting plate cooperate with each other, so that the annular seat can be accurately embedded into the mounting plate during installation, and the rotation of the annular seat during the detection process is prevented, thereby ensuring that the annular body is in an accurate position during detection and improving detection accuracy.

[0019] Furthermore, in one detection and positioning fixture of this application, a linear drive device is mounted on the side of the mounting plate away from the annular seat, and the drive end of the linear drive device is connected to the moving shaft. As a preferred embodiment of this application, in one detection and positioning fixture of this application, the linear drive device provides power for the axial movement of the moving shaft. By driving the moving shaft to move axially, it drives the connecting rod and the push rod to move, thereby pushing the clamping part to rotate around the pivot, realizing the clamping and releasing function of the thin sheet annular body.

[0020] Furthermore, in one detection and positioning fixture of this application, the bottom of the frame is provided with a set of casters and a set of adjustable bases, with the casters and adjustable bases spaced apart along the circumference of the frame. As a preferred embodiment of this application, the casters allow the detection and positioning fixture to be easily moved within the work area. Workers can push the frame, and the movement of the equipment is achieved through the rolling of the casters, improving the flexibility of the equipment. The adjustable bases are used to adjust the height to keep the frame level when the ground is uneven, ensuring that the equipment can work normally on different surfaces.

[0021] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0022] The purpose of this invention is to provide a detection and positioning fixture. By setting up a ring seat, a clamping part, a moving shaft, a connecting rod, a push rod, and an elastic element, the axial movement of the moving shaft drives the connecting rod and the push rod, which in turn pushes the clamping part to rotate around a pivot to achieve precise clamping and release of the ring-shaped body of the thin sheet material. This ensures that the applied clamping force is evenly distributed on the edge of the thin sheet material, preventing damage. Furthermore, the design of the receiving groove, buffer protective layer, frame, mounting plate, and related connecting structures ensures accurate and stable positioning of the thin sheet material during the detection process, preventing damage. At the same time, it facilitates the movement, installation, and adjustment of the equipment. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of a detection and positioning fixture according to an embodiment of this application;

[0024] Figure 2 This is a three-dimensional structural diagram of the mounting plate and frame in a detection and positioning fixture according to an embodiment of this application;

[0025] Figure 3 This is a partial three-dimensional structural diagram of a detection and positioning fixture in an embodiment of this application;

[0026] Figure 4 This is a cross-sectional view of a detection and positioning fixture according to an embodiment of this application;

[0027] Figure 5 for Figure 4 A magnified view of a portion of area A in the middle circle.

[0028] In the diagram: 1-Thin sheet; 11-Ring-shaped body; 2-Ring-shaped seat; 20-Cavity; 21-Limiting protrusion; 211-Limiting protrusion; 22-Pin; 3-Clamping part; 30-Groove; 301-Buffer protective layer; 4-Moving shaft; 40-Notch; 41-Sloping surface; 5-Connecting rod; 50-Oblong hole; 6-Top rod; 7-Elastic element; 8-Frame; 81-Mounting plate; 810-Mounting countersunk; 811-Notch; 82-Cast; 83-Adjustable base; 9-Linear drive device. Detailed Implementation

[0029] like Figure 1 , 3 As shown in Figure 4, a detection and positioning fixture is used to clamp and position a thin sheet 1 before detection, comprising:

[0030] Annular seat 2, wherein the annular seat 2 is provided with a cavity 20;

[0031] A set of clamping parts 3 are arranged in a circumferential array along the outer side of the annular seat 2. The clamping parts 3 are pivotally connected to the annular seat 2. The thin sheet material 1 includes: an annular body 11. The set of clamping parts 3 is used to clamp and position the annular body 11.

[0032] The movable shaft 4 is movably disposed within the cavity 20. The outer surface of the movable shaft 4 is provided with: an inclined surface 41 that is inclined along the axial direction of the movable shaft 4 and a set of notches 40. The inclined surface 41 is arranged circumferentially along the movable shaft 4, and the set of notches 40 is arranged circumferentially along the movable shaft 4 and corresponds one-to-one with a set of clamping parts 3.

[0033] A set of connecting rods 5 are movably mounted on the annular seat 2. The ends of the set of connecting rods 5 are respectively hinged to a set of notches 40. The end of the connecting rod 5 away from the moving shaft 4 extends axially out of the annular seat 2.

[0034] A set of push rods 6 are movably mounted on the annular seat 2. The two ends of the push rods 6 abut against the clamping part 3 and the inclined surface 41, respectively. The pivot of the clamping part 3 and the annular seat 2 is located between the connecting rod 5 and the push rods 6.

[0035] The elastic element 7 is disposed between the clamping part 3 and the annular seat 2, and its two ends are respectively connected to the clamping part 3 and the annular seat 2.

[0036] Based on the above structure, the principle of the detection and positioning fixture is as follows: the axial movement of the moving shaft 4 causes the connecting rod 5 and the push rod 6 to move, pushing the clamping part 3 to rotate around the pivot between the clamping part 3 and the annular seat 2, causing a set of clamping parts 3 to retract or expand radially along the annular seat 2, thereby realizing the function of clamping or releasing the annular body 11; when it is necessary to clamp the annular body 11, a set of clamping parts 3 is in the expanded state, and the end of the push rod 6 near the moving shaft 4 is located at the bottom of the inclined surface 41. The inclination direction of the inclined surface 41 is: when the moving shaft 4 moves downward axially, the inclined surface 41 pushes the push rod 6 to extend radially out of the annular seat 2, and the push rod 6 pushes the clamping part 3 to rotate around the pivot a little away from the moving shaft 4, causing the clamping part 3 to retract radially inward towards the annular seat 2, thereby clamping the annular body 11; at this time, because the connecting rod 5 is hinged to the moving shaft 4 through the notch 40, the axial movement of the moving shaft 4 drives the connecting rod 5 to move, further adjusting the position of the clamping part 3, ensuring that the clamping part 3 is aligned with the annular body 11. The clamping force of body 11 is evenly distributed. When it is necessary to release the annular body 11, the moving shaft 4 returns to its axial position, and the connecting rod 5 axially abuts against the outside of the clamping part 3, causing the clamping part 3 to rotate in the opposite direction around its pivot. At this time, the clamping part 3 pushes the push rod 6 to move. The end of the push rod 6 away from the clamping part 3 retracts and returns to its original position along the inclined surface 41, no longer applying a pushing force to the clamping part 3. The clamping part 3 unfolds and rotates in the opposite direction around the pivot under the action of the elastic element 7, unfolding radially outward from the annular seat 2, thereby releasing the annular body 11. The design of the elastic element 7 is to prevent the clamping part 3 from unfolding too much and to prevent the annular body 11 from falling off the clamping part 3. When the clamping part 3 unfolds outward during the release process, the elastic element 7 is stretched and generates a restoring force, limiting the unfolding angle of the clamping part 3 and ensuring that the clamping part 3 does not unfold excessively and cause the annular body 11 to fall off. At the same time, the elastic element 7 is compressed during the clamping process, providing additional clamping force to the clamping part 3 and enhancing the stability of the clamping. There are 3 clamping parts 3 in a set. Correspondingly, there are 3 missing parts 40, 3 connecting rods 5, 3 top rods 6, and 3 elastic elements 7. The elastic element 7 is a spring.

[0037] In this embodiment, the connecting rod 5 has an elongated hole 50 near the clamping part 3, and a pin 22 is mounted on the annular seat 2. The pin 22 is installed inside the elongated hole 50. When the moving shaft 4 moves axially, the pin 22 slides within the elongated hole 50, and the connecting rod 5 rotates around the pin 22. The elongated hole 50 and the pin 22 work together to not only guide and limit the movement of the connecting rod 5, but also realize the radial movement of the clamping part 3 through the rotation of the connecting rod 5, adjust the position of the clamping part 3, ensure the uniform distribution of clamping force, and enhance the flexibility and adaptability of the mechanism.

[0038] In this embodiment, each of the clamping portions 3 is provided with a receiving groove 30 at the end away from the annular seat 2. The receiving groove 30 is used to accommodate the edge of the annular body 11. The design of the receiving groove 30 can cooperate with the edge of the annular body 11 to ensure that the annular body 11 is accurately positioned during the clamping process, avoid damage to the annular body 11 during the clamping process, and ensure that the annular body 11 will not accidentally fall off during the testing process.

[0039] In this embodiment, as Figure 5 As shown, a buffer protective layer 301 is provided on the inner sidewall of the receiving groove 30. The buffer protective layer 301 is used to prevent collision between the annular body 11 and the sidewall of the receiving groove 30 during the detection and clamping process, and to prevent damage to the annular body 11. The buffer protective layer 301 is made of polyurethane coating.

[0040] In this embodiment, as Figure 2 As shown, the device also includes: a frame 8, on which a mounting plate 81 is provided. The mounting plate 81 has a mounting countersunk 810 corresponding to the annular seat 2. The annular seat 2 is installed in the mounting countersunk 810. The annular seat 2 extends radially with a limiting protrusion 21, which abuts against the side wall of the mounting countersunk 810 in both the axial and radial directions. The annular seat 2 is installed in the mounting countersunk 810, and the limiting protrusion 21 of the annular seat 2 abuts against the side wall of the mounting countersunk 810 in both the axial and radial directions. This design effectively positions the annular seat 2 on the mounting plate 81, preventing displacement of the annular seat 2 during testing. This ensures stable clamping and positioning of the annular body 11, avoids affecting the test results due to movement of the annular seat 2, and facilitates accurate reinstallation of the annular seat 2 after removal from the mounting plate 81.

[0041] In this embodiment, the limiting protrusion 21 extends radially and is provided with a set of limiting protrusions 211. The set of limiting protrusions 211 are evenly spaced along the circumference of the limiting protrusion 21. The mounting plate 81 is provided with notches 811 corresponding to the limiting protrusions 211, which are used to accommodate the limiting protrusions 211. The limiting protrusions 211 and the corresponding notches 811 on the mounting plate 81 cooperate with each other, allowing the annular seat 2 to be accurately embedded in the mounting plate 81 during installation, and preventing the annular seat 2 from rotating during the testing process. This ensures that the annular body 11 is in an accurate position during testing, improving testing accuracy. The set of limiting protrusions 211 consists of three parts, and correspondingly, the set of notches 811 also consists of three parts.

[0042] In this embodiment, a linear drive device 9 is mounted on the side of the mounting plate 81 away from the annular seat 2. The drive end of the linear drive device 9 is connected to the moving shaft 4. The linear drive device 9 provides power for the axial movement of the moving shaft 4. By driving the moving shaft 4 to move axially, it drives the connecting rod 5 and the push rod 6 to move, pushing the clamping part 3 to rotate around the pivot, thereby realizing the clamping and releasing function of the annular body 11 of the thin sheet 1. The linear drive device 9 is a cylinder.

[0043] In this embodiment, the bottom of the frame 8 is equipped with a set of casters 82 and a set of adjustable bases 83, which are spaced apart along the circumference of the frame 8. The casters 82 allow the detection and positioning fixture to be easily moved within the work area; workers can push the frame 8, and the movement of the equipment is achieved by the rolling of the casters 82, improving the equipment's flexibility. The adjustable bases 83 are used to adjust the height of the frame 8 to keep it level when the ground is uneven, ensuring that the equipment can work normally on different surfaces. There are four casters 82 and four adjustable bases 83.

[0044] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on the explanation herein, those skilled in the art can conceive of other specific embodiments of this utility model without creative effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A detection and positioning fixture for clamping and positioning thin sheet material (1) before detection, characterized in that: include: Annular seat (2), wherein the annular seat (2) is provided with a cavity (20); A set of clamping parts (3) are arranged in a circumferential array along the outer side of the annular seat (2). The clamping parts (3) are pivotally connected to the annular seat (2). The thin sheet material (1) includes: an annular body (11). The set of clamping parts (3) is used to clamp and position the annular body (11). A movable shaft (4) is movably disposed in a cavity (20). The outer side of the movable shaft (4) is provided with an inclined surface (41) that is inclined along the axial direction of the movable shaft (4) and a set of notches (40). The inclined surface (41) is arranged circumferentially along the movable shaft (4), and the set of notches (40) is arranged circumferentially along the movable shaft (4) and corresponds one-to-one with a set of clamping parts (3). A set of connecting rods (5) are movably mounted on the annular seat (2). The ends of the set of connecting rods (5) are respectively hinged in a set of notches (40). The end of the connecting rod (5) away from the moving shaft (4) extends axially out of the annular seat (2). A set of push rods (6) are movably mounted on the annular seat (2). The two ends of the push rods (6) abut against the clamping part (3) and the inclined surface (41) respectively. The pivot of the clamping part (3) and the annular seat (2) is located between the connecting rod (5) and the push rods (6). The elastic element (7) is disposed between the clamping part (3) and the ring seat (2), and the two ends of the elastic element (7) are respectively connected to the clamping part (3) and the ring seat (2).

2. The detection and positioning fixture according to claim 1, characterized in that: The connecting rod (5) has an elongated hole (50) on the side near the clamping part (3). A pin (22) is installed on the annular seat (2). The pin (22) is installed in the elongated hole (50). When the moving shaft (4) moves axially, the pin (22) slides in the elongated hole (50), and the connecting rod (5) rotates around the pin (22).

3. The detection and positioning fixture according to claim 1, characterized in that: Each of the clamping parts (3) is provided with a receiving groove (30) at the end away from the annular seat (2), and the receiving groove (30) is used to accommodate the edge of the annular body (11).

4. A detection and positioning fixture according to claim 3, characterized in that: The inner wall of the trough (30) is provided with a buffer protective layer (301).

5. A detection and positioning fixture according to claim 1, characterized in that: Also includes: A frame (8) is provided with a mounting plate (81). The mounting plate (81) is provided with a mounting countersunk (810) corresponding to the annular seat (2). The annular seat (2) is installed in the mounting countersunk (810). The annular seat (2) extends radially with a limiting protrusion (21). The limiting protrusion (21) is in contact with the side wall of the mounting countersunk (810) in the axial and radial directions of the annular seat (2), respectively.

6. A detection and positioning fixture according to claim 5, characterized in that: The limiting protrusion (21) extends radially and is provided with a set of limiting protrusions (211). The set of limiting protrusions (211) is evenly spaced along the circumference of the limiting protrusion (21). The mounting plate (81) is provided with a notch (811) corresponding to the limiting protrusion (211). The notch (811) is used to accommodate the limiting protrusion (211).

7. A detection and positioning fixture according to claim 5, characterized in that: A linear drive device (9) is installed on the side of the mounting plate (81) away from the annular seat (2), and the drive end of the linear drive device (9) is connected to the moving shaft (4).

8. A detection and positioning fixture according to claim 5, characterized in that: The bottom of the frame (8) is provided with a set of casters (82) and a set of adjustable bases (83), and the set of casters (82) and adjustable bases (83) are all spaced apart along the circumference of the frame (8).

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