Target ball of laser tracker

Abstract

The invention discloses a laser tracker target ball which comprises a ball body, a cavity is formed in the ball body, an opening communicated with the cavity is formed in the ball body, a pressing ring is connected to the opening in a threaded mode, a lens base and a cube corner retroreflector are arranged in the cavity, and a sheath is arranged between the pressing ring and the lens base. According to the target ball of the laser tracker, the cube-corner retroreflector and the lens seat are fixed after preliminary calibration, and after the cube-corner retroreflector and the lens seat are installed in the target ball, the relative space relation can be conveniently adjusted. After the product is finished, the optical and physical structures are relatively stable, and the external interference resistance is high. The pressing ring is reasonable in structural design and is matched with the sheath, so that the effect of reinforcing the internal structure of the ball body is achieved, the cubic corner retroreflector is protected, and the service life of the target ball is prolonged. The sphere and the base are connected through magnetic attraction force, mounting and dismounting are convenient, working efficiency is improved, and measurement precision is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of laser trackers, and in particular relates to a target ball of a laser tracker. Background Art

[0002] Laser trackers, with their high precision and efficiency, are widely used in numerous key industries, including aerospace, automotive manufacturing, and machining. They play an indispensable role in dimensional inspection, installation, and positioning of large components. As one of the core components of a laser tracker, the performance of the target sphere is directly related to the accuracy and stability of the entire measurement system. Currently, existing laser tracker targets on the market face several pressing structural design challenges. For one thing, the cube corner retroreflectors are directly glued into the target, making installation and positioning complex. The concentricity between the cube corner retroreflectors and the target sphere is difficult to effectively control, making it difficult to ensure consistent product quality. Calibration is time-consuming and labor-intensive, resulting in low production efficiency. Furthermore, the optical components within the target sphere are not stable enough and are prone to displacement with long-term use or external vibrations, leading to reduced measurement accuracy. In summary, the existing laser tracker target ball has many shortcomings during the assembly process and long-term use. A new structural design is urgently needed to solve these problems in order to improve the measurement accuracy and efficiency of the laser tracker and meet the ever-changing needs of the modern industrial measurement field. Summary of the Invention

[0003] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a laser tracker target ball includes a sphere, a cavity is provided inside the sphere, an opening communicating with the cavity is provided on the sphere, a pressure ring is threadedly connected to the opening, a lens seat and a cube corner retroreflector are provided in the cavity, and a sheath is provided between the pressure ring and the lens seat. As a preferred embodiment of the above technical solution, a base is further included, the base includes a seat body, a ball socket for placing a sphere is provided in the middle of the seat body, and the sphere and the seat body are connected by magnetic attraction.

[0004] As a preferred embodiment of the above technical solution, the cube corner retroreflector is composed of three optical lenses spliced ​​together, and a cube corner is formed between the three optical lenses.

[0005] As a preferred embodiment of the above technical solution, the pressure ring includes a lower threaded portion, a limiting portion and an upper connecting portion connected in sequence, the lower threaded portion extends into the cavity and is threadedly connected to the spherical body, the diameter of the limiting portion is larger than the diameter of the opening, and the upper connecting portion is provided with two through holes close to each other, and the inner diameter of the upper connecting portion gradually increases from the inside to the outside.

[0006] As a preferred embodiment of the above technical solution, a receiving groove is provided in the middle of the lens seat, a supporting structure is provided in the middle of the receiving groove, the lower end of the cube corner retroreflector is inserted into the supporting structure, glue is provided in the supporting structure, a plurality of glue removal grooves are provided on the supporting structure, a plurality of process grooves are provided around the lens seat, and process holes are provided in the process grooves.

[0007] As a preferred embodiment of the above technical solution, a connecting groove communicating with the ball socket is provided on one side of the seat body.

[0008] As a preferred embodiment of the above technical solution, the lower end of the seat is fixedly connected with a fixing part.

[0009] The beneficial effects of the present invention are as follows: the target sphere, the cube corner retroreflector, and the lens holder of the laser tracker of the present invention are fixed after preliminary calibration, and after being installed inside the target sphere, the relative spatial relationship can be easily adjusted. After the product is completed, the optical and physical structures are relatively stable and have strong resistance to external interference. The pressure ring structure is rationally designed and, in conjunction with the protective sheath, not only serves to fix the lens holder, but also provides protection for the cube corner retroreflector, thereby increasing the service life of the target sphere. The sphere and the base are connected by magnetic attraction, which facilitates installation and disassembly, improves work efficiency, and ensures measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of a sphere; Figure 2 It is a structural diagram of the lens holder; Figure 3 It is a structural diagram of the pressure ring; Figure 4 is a schematic diagram of the structure of a cube corner retroreflector; Figure 5 It is a structural diagram of the seat body; Figure 6 It is a structural diagram of a right-angle seat; Figure 7 It is a structural diagram of the drift seat; Figure 8 It is a schematic diagram of the cross-sectional structure of the drift seat. DETAILED DESCRIPTION

[0011] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0012] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0013] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0014] like Figure 1-8 As shown, the laser tracker target sphere comprises a sphere 1 with a cavity 3 within it. An opening 4 is provided on the sphere 1, communicating with the cavity 3. A pressure ring 5 is threadedly connected to the opening 4. A lens holder 6 and a cube corner retroreflector 7 are located within the cavity 3, with a protective sleeve 8 positioned between the pressure ring 5 and the lens holder 6. The lens holder 6 and cube corner retroreflector 7 are installed into the cavity 3. The relative positions of the lens holder 6, cube corner retroreflector 7, and the sphere 1 are adjusted using tools and measurement, and then secured with glue. The protective sleeve 8 is then installed, with the upper end of the cube corner retroreflector 7 positioned within the sleeve 8. Finally, the pressure ring 5 is installed.

[0015] Furthermore, it also includes a base, which includes a seat body 2. A ball socket 9 for placing the ball 1 is provided in the middle of the seat body 2. The ball 1 and the seat body 2 are connected by magnetic attraction.

[0016] Furthermore, the cube corner retroreflector 7 is composed of three optical lenses 10 spliced ​​together (such as Figure 4 As shown in FIG. 1 , a cube corner is formed between three optical lenses 10. One optical lens 10 is small, another optical lens 10 is medium, and the last optical lens 10 is large. The three optical lenses 10 are sequentially bonded to form a cube corner retroreflector 7.

[0017] Further, such as Figure 3As shown, the pressure ring 5 includes a lower threaded portion 11, a stopper portion 12, and an upper connecting portion 13, which are sequentially connected. The lower threaded portion 11 extends into the cavity 3 and is threadedly connected to the sphere 1. The stopper portion 12 has a diameter larger than the diameter of the opening 4. The upper connecting portion 13 is fastened with a protective cover and has two adjacent through-holes 14, the inner diameter of which gradually increases from the inside out. The through-holes 14 are used to attach a wristband, hand strap, etc. The stopper portion 12 prevents the lower threaded portion 11 from penetrating too deeply and damaging the lens holder 6.

[0018] Further, such as Figure 2 As shown, the lens holder 6 has a receiving groove 15 in the middle, and a support structure 16 in the middle of the receiving groove 15. The lower end of the cube corner retroreflector 7 is inserted into the support structure 16. Glue is provided in the support structure 16, and the support structure 16 is provided with a plurality of glue drainage grooves 17. The lens holder 6 is surrounded by a plurality of process grooves 18, each of which has a process hole 19. The cube corner retroreflector 7 and the lens holder 6 are preassembled. During assembly, glue is first injected into the support structure 16 of the lens holder 6, and then the lower end of the cube corner retroreflector 7 is inserted into the support structure 16. Excess glue is discharged through the glue drainage grooves 17. The cube corner retroreflector 7 and the lens holder 6 are then installed together into the cavity 3 within the sphere 1. The spatial relationship between the lens holder 6 and the sphere 1 can be adjusted by using a tool to act on the process grooves 18 and process holes 19. When the cube corner retroreflector 7 has a large angular deviation, the lens holder 6 can be removed and the bottom of the lens holder 6 can be subjected to additive processing or subtractive processing so that the lens holder 6 and the cube corner retroreflector 7 can form a preset concentricity with the sphere 1 after the lens holder 6 and the cube corner retroreflector 7 are reinstalled.

[0019] Furthermore, a connecting groove 20 is provided on one side of the seat body 2 to connect with the ball socket 9. The connecting groove 20 facilitates cleaning of dust and the like in the ball socket 9.

[0020] Furthermore, the lower end of the base 2 is fixedly connected with a fixing portion 21. The fixing portion 21 is used to connect the base 2 to the surface of the object to be measured. The fixing portion 21 has various forms and can be a columnar shape coaxially arranged with the base 2 (such as Figure 5 As shown, the pile seat can also be a semi-cylindrical seat fixed to one side of the seat body 2 and having a magnet installed inside (such as Figure 6 Alternatively, a plurality of wiping grooves 22 are provided around the ball socket 9 on the seat body 2 (as shown in FIG. Figure 7 As shown in the figure, the drift seat is convenient for moving the ball 1 and the seat body 2 as a whole. When the ball 1 rotates in the ball socket 9, the wiping groove 22 can help scrape off the dirt attached to the ball.

[0021] It is worth mentioning that the technical features such as the laser tracker involved in the patent application of this invention should be regarded as prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected by conventional options in the field, and should not be regarded as the inventive point of this patent. This patent will not be further elaborated.

[0022] The above describes in detail the preferred specific embodiments of the present invention. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solutions that can be obtained by technicians in this technical field through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of existing technologies should be within the scope of protection determined by the claims.

Claims

1. Laser tracker target ball, characterized in that, The utility model comprises a sphere with a cavity inside, an opening connected to the cavity, a pressure ring being threadedly connected to the opening, a lens seat and a cube corner retroreflector being arranged in the cavity, a protective sleeve being arranged between the pressure ring and the lens seat, and a base being included, the base comprising a seat body, a ball socket being arranged in the middle of the seat body for placing the sphere, the sphere and the seat body being connected by magnetic attraction, and the cube corner retroreflector being composed of three optical lenses spliced ​​together, and a cube corner being formed between the three optical lenses.

2. The laser tracker target ball according to claim 1, wherein: The pressure ring includes a lower threaded portion, a limiting portion and an upper connecting portion connected in sequence. The lower threaded portion extends into the cavity and is threadedly connected to the spherical body. The diameter of the limiting portion is larger than the diameter of the opening. The upper connecting portion is provided with two through holes close to each other, and the inner diameter of the upper connecting portion gradually increases from the inside to the outside.

3. The laser tracker target sphere according to claim 1, wherein: A receiving groove is provided in the middle of the lens seat, a supporting structure is provided in the middle of the receiving groove, the lower end of the cube corner retroreflector is inserted into the supporting structure, glue is provided in the supporting structure, and a plurality of glue discharge grooves are provided on the supporting structure. A plurality of process grooves are provided around the lens seat, and process holes are provided in the process grooves.

4. The laser tracker target sphere according to claim 2, wherein: A connecting groove communicating with the ball socket is provided on one side of the seat body.

5. The laser tracker target sphere according to claim 1 or 4, wherein: The lower end of the seat body is fixedly connected with a fixing part.

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