Large-size hole centering assist device for laser projection positioning system

Abstract

The utility model discloses a large-size hole centering assist device for a laser projection positioning system, which belongs to the field of laser projection positioning, and comprises a main body piece, the main body piece is provided with a centering hole and at least three radial chutes, and the radial chutes are uniformly distributed around the circumference of the centering hole; each radial sliding groove is internally provided with a supporting piece capable of sliding relative to the radial sliding groove, the supporting pieces are used for making contact with the hole wall of a large-size hole needing to be centered, and each supporting piece is provided with a locking piece used for locking the position of the supporting piece. The centering assist device provided by the utility model not only can be suitable for hole site center positioning of large-size holes, but also can be suitable for large-size holes with various diameters, and has the advantages of simple structure, low cost, convenience in operation and the like.

Description

Technical Field

[0001] The utility model relates to the field of laser projection, in particular to a large-size hole centering auxiliary device for a laser projection positioning system. Background Art

[0002] In vision-based laser projection positioning systems, it is often necessary to determine the center position of relevant hole positions on the workpiece with the cooperation of reference target points, so that the laser projection positioning system software can align the coordinate system of the actual workpiece with the corresponding CAD model and guide subsequent processing or assembly work. Therefore, the positioning accuracy of the laser projection positioning system for the center of the hole positions on the workpiece is crucial.

[0003] Prior art laser projection positioning systems require a target pin to be placed in a workpiece hole and then identify a coded reference point on the pin to achieve positioning. However, existing target pins typically have diameters of 6mm, 8mm, or 10mm, so they can only accommodate holes of corresponding diameters on the workpiece. However, accurate and rapid positioning of the center of large holes on the workpiece is difficult, hindering subsequent work. Summary of the Invention

[0004] In view of the problem in the prior art that the laser projection positioning system has difficulty in accurately locating the hole center of large-sized holes on a workpiece, the purpose of the present utility model is to provide a large-sized hole centering aid for a laser projection positioning system, so as to at least partially solve the above problem.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A large-size hole centering aid for a laser projection positioning system includes a main body, which is provided with a centering hole and a radial slide groove. There are at least three radial slide grooves and they are evenly distributed around the centering hole. Each of the radial slide grooves is provided with a support member that can slide relative to it. The support member is used to contact the hole wall of the large-size hole that needs to be centered. Each of the support members is equipped with a locking member for locking its position.

[0007] In some preferred embodiments, the support member includes a sliding block and a supporting block connected to each other, the sliding block is used to slide in the radial sliding groove, and the supporting block is used to contact the hole wall of the large-sized hole that needs to be centered.

[0008] In some preferred embodiments, the sliding block and the supporting block are both in the shape of elongated strips and are parallel to the corresponding radial sliding grooves.

[0009] In some preferred embodiments, the locking member is configured as a screw and is threadedly connected to a side of the sliding block facing away from the supporting block.

[0010] In some preferred embodiments, the connection point between the locking member and the sliding block is offset from the length center of the support block.

[0011] In some preferred embodiments, the support member further includes a protrusion, and the protrusion is arranged on a side of the support block facing away from the sliding block.

[0012] In some preferred embodiments, a plurality of magnets are provided on the main body.

[0013] In some preferred embodiments, the plurality of magnets are evenly distributed circumferentially around the centering hole.

[0014] In some preferred embodiments, the main body is disc-shaped, and the centering hole is opened at the center of the main body.

[0015] In some preferred embodiments, the main body is further provided with circular scale lines and / or graduation lines; there is at least one circular scale line and it is arranged concentrically with the centering hole; the graduation lines are parallel to the radial grooves, and each of the radial grooves is provided with the graduation lines.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects: the centering aid provided by the present invention, due to the arrangement of the centering hole, radial groove, support member, and locking member, allows the centering of a large-sized hole to be centered with a known diameter to be centered by using a ruler to determine the position of the outer edge of the support member. The support member is then moved in the radial groove and secured in position within the radial groove by the locking member. This ensures that the distances from the outer edges of the three support members to the center of the centering hole are identical and equal to the radius of the large-sized hole to be centered. Therefore, when the centering aid is placed at the large-sized hole to be centered (either as a whole or with only the support member), the outer edges of the three support members all contact the wall of the large-sized hole to be centered. At this point, the center of the centering hole is the same as the center of the large-sized hole to be centered. This allows the target pin configured by the laser projection positioning system to be placed in the centering hole, thereby achieving positioning of the large-sized hole to be centered. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of the centering aid disclosed in Example 1 of the present utility model.

[0018] Figure 2 This is a schematic structural diagram of the centering aid disclosed in Example 1 of the utility model in another direction.

[0019] Figure 3 This is a schematic structural diagram of the support member in Example 1 of the present utility model.

[0020] Figure 4A schematic front view of a centering aid with circular markings.

[0021] Figure 5 This is a front view of a centering aid with scale lines disclosed in Example 2 of the present utility model.

[0022] Figure 6 This is a structural schematic diagram of the centering aid disclosed in Example 3 of the present utility model.

[0023] Figure 7 This is a schematic structural diagram of the centering aid disclosed in Example 3 of the present utility model in another direction.

[0024] Figure 8 This is a schematic structural diagram of the support member in Example 3 of the present utility model.

[0025] In the figure: 1-main part, 2-centering hole, 3-radial slide groove, 4-support part, 41-sliding block, 42-support block, 43-bump, 5-locking part, 6-magnet, 7-circular scale line, 8-scale line. DETAILED DESCRIPTION

[0026] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0027] It should be noted that, in the description of the present invention, the terms "up", "down", "left", "right", "front", "back", etc. indicating directions or positional relationships are based on the description of the structure of the present invention shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it cannot be understood as a limitation on the present invention.

[0028] The "first" and "second" in this technical solution are only used to distinguish the same or similar structures, or corresponding structures with similar functions, and are not an arrangement of the importance of these structures, nor do they have any ranking, size comparison, or other meanings.

[0029] In addition, unless otherwise expressly specified or limited, the terms "installed" and "connected" should be understood broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two structures. Those skilled in the art can understand the specific meanings of the above terms in this utility model based on the overall concept of this utility model and the specific context of this solution.

[0030] Example 1

[0031] A large-size hole centering aid for laser projection positioning systems, such as Figure 1-3 As shown, it includes a main body 1, a centering hole 2, a radial sliding groove 3, a support member 4 and a locking member 5.

[0032] The main body 1 is roughly disc-shaped. It is provided with a centering hole 2 and radial grooves 3. The centering hole 2 is circular and located at the center of the main body 1, i.e., concentric with the main body 1. The radial grooves 3 are elongated through-holes, with their longitudinal centerline coinciding with a line along a diameter of the centering hole 2 (or, in this case, the main body 1). There are three radial grooves 3, evenly spaced circumferentially around the centering hole 2, i.e., spaced 120° apart.

[0033] Each radial slot 3 is provided with a support member 4 capable of sliding relative thereto. The support member 4 comprises a sliding block 41 and a support block 42. The sliding block 41 is configured to slide within the radial slot 3. The support block 42 is located on the front side of the main member 1 and is connected to the sliding block 41. The two are typically integrally formed. The support block 42 is typically larger than the radial slot 3 to prevent it from falling into the radial slot 3. Specifically, the support block 42 is configured to contact the wall of a large hole that requires centering, driven by the sliding block 41.

[0034] Each support member 4 is equipped with a locking member 5 for locking its position in the radial slot 3. For example, the locking member 5 is configured as a screw, which is arranged on the back side of the main member 1 and is threadedly connected to the sliding block 41. Typically, the screw has a larger diameter than the width of the radial slot 3 to prevent it from falling into the radial slot 3. When the locking member 5 is turned, the support block 42 is pressed against the back side of the main member 1 and the screw is pressed against the front side of the main member 1. As a result, the position of the support member 4 relative to the main member 1 is locked under the action of friction, that is, the position of the support member 4 in the radial slot 3 is locked.

[0035] It is easy to understand that the front of the main body 1 is also provided with a circular score line 7, which is arranged concentrically with the centering hole 2 and has a known diameter, such as Figure 4 shown.

[0036] During use, the diameter of the large-sized hole to be centered is usually also known. Then, based on the radius difference between the large-sized hole to be centered and the circular scale 7, the position of the outer edge of the support member 4 can be determined with the help of a ruler. The support member 4 is then moved in the radial slot 3 and fixed in position in the radial slot 3 by the locking member 5. This ensures that the distances from the outer edges of the three support members 4 to the center of the centering hole 2 are the same and equal to the radius of the large-sized hole to be centered. Therefore, when the centering aid is arranged at the large-sized hole to be centered (either as a whole or only the support member 4 is placed in the hole), the outer edges of the three support members 4 all contact the wall of the large-sized hole to be centered. At this time, the center of the centering hole 2 is the center of the large-sized hole to be centered. After the target pin configured by the laser projection positioning system is placed in the centering hole 2, the positioning of the large-sized hole to be centered can be achieved.

[0037] It is easy to understand that there is more than one circular mark 7. Multiple circular marks 7 of different diameters can be set as needed, and they are all arranged concentrically with the centering hole 2. In this way, when using a ruler to determine the position of the outer edge of the support member 4, a circular mark 7 with a diameter closest to the large-sized hole to be centered can be selected for operation.

[0038] It is easy to understand that the number of radial slots 3 can be more than three, and can also be four or more.

[0039] In addition, the main body 1 is provided with a plurality of magnets 6, which are arranged circumferentially around the centering hole 2, for example, evenly distributed. For example, if there are three magnets 6, they are arranged at 120° intervals. The arrangement of the magnets 6 does not affect the movement of the support member 4 in the radial slot 3. The arrangement of the magnets 6 allows the target pin configured by the laser projection positioning system to be attracted to the centering hole 2, thereby facilitating identification and positioning by the laser projection positioning system.

[0040] It is easy to understand that the sliding block 41 can also be configured as an elongated strip and parallel to the corresponding radial slot 3. This arrangement prevents the support member 4 from rotating relative to the radial slot 3. In addition, the support block 42 is also configured as an elongated strip and parallel to the corresponding radial slot 3, and the connection point between the locking member 5 and the sliding block 41 is offset from the longitudinal center of the support block 42. This arrangement allows the maximum effective diameter of the support member 4 to be changed by changing the arrangement direction of the support block 42.

[0041] Example 2

[0042] In Example 1, when a small number of circular scale lines 7 are provided, it is often necessary to use a scale to specifically determine the exact position of the support member 4 in the radial slot 3 .

[0043] Therefore, in this embodiment, Figure 5As shown, scale lines 8 are also provided on the front of the main body 1. The scale lines 8 are straight lines and are used to represent the distance. There are three scale lines 8 and they are respectively arranged near the positions of the three radial slide grooves 3. In addition, the straight lines where the scale lines 8 are located are parallel to the lines connecting the outer edges of each support member 4 and the center of the centering hole 2.

[0044] With this arrangement, the scale lines 8 replace the function of the scale, and even by lengthening the scale lines 8, the circular scale lines 7 can be eliminated, and the distance from the outer edge of each support member 4 to the center of the centering hole 2 can be determined entirely by the scale lines 8. It is easy to understand that when the shape and size of the support members 4 are fixed, the distance from the inner edge of each support member 4 to the center of the centering hole 2 is usually determined by the scale lines 8.

[0045] Example 3

[0046] In this embodiment, Figure 6-8 As shown, the support member 4 further includes a protrusion 43, which is disposed on the side of the support block 42 facing away from the sliding block 41, i.e., the support member 4 has a greater overall thickness. In this way, when the large-sized hole to be centered is a stepped hole, the support member 4 can extend through the protrusion 43 to the position where the large-sized hole to be centered is to be located.

[0047] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A large-size hole centering aid for a laser projection positioning system, characterized by: It includes a main body, which is provided with a centering hole and a radial slide groove. There are at least three radial slide grooves and they are evenly distributed around the centering hole. Each of the radial slide grooves is provided with a support member that can slide relative to it. The support member is used to contact the hole wall of a large-sized hole that needs to be centered. Each of the support members is equipped with a locking member for locking its position.

2. The large-size hole centering aid for a laser projection positioning system according to claim 1, characterized in that: The support member comprises a sliding block and a supporting block connected to each other, the sliding block is used to slide in the radial sliding groove, and the supporting block is used to contact the hole wall of the large-sized hole that needs to be centered.

3. The large-size hole centering aid for a laser projection positioning system according to claim 2, characterized in that: The sliding block and the supporting block are both in the shape of long strips and are parallel to the corresponding radial sliding grooves.

4. The large-size hole centering aid for a laser projection positioning system according to claim 2, characterized in that: The locking member is configured as a screw and is threadedly connected to a side of the sliding block facing away from the supporting block.

5. The large-size hole centering aid for a laser projection positioning system according to claim 4, characterized in that: The connection point between the locking member and the sliding block deviates from the length center of the supporting block.

6. The large-size hole centering aid for a laser projection positioning system according to claim 2, characterized in that: The support member further includes a protrusion, which is arranged on a side of the support block away from the sliding block.

7. The large-size hole centering aid for a laser projection positioning system according to claim 1, characterized in that: A plurality of magnets are arranged on the main body.

8. The large-size hole centering aid for a laser projection positioning system according to claim 7, characterized in that: The plurality of magnets are evenly distributed around the centering hole.

9. The large-size hole centering aid for a laser projection positioning system according to claim 1, characterized in that: The main body is in a disc shape, and the centering hole is opened at the center of the main body.

10. The large-size hole centering aid for a laser projection positioning system according to claim 1, characterized in that: The main body is further provided with circular engraved lines and / or scale lines; there is at least one circular engraved line and it is arranged concentrically with the centering hole; the scale lines are parallel to the radial slide grooves, and each radial slide groove is provided with the scale lines.

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