Automatic centering target ball supporting base

Abstract

An automatic centering target ball supporting base comprises a supporting seat and a circular sleeve which is coaxially arranged below the supporting seat and can elastically deform, a cylindrical blind hole is coaxially formed in the center of the upper end face of the supporting seat, the upper end of the cylindrical blind hole expands outwards to form a coaxial conical surface, and a magnet is installed at the bottom of the cylindrical blind hole; the middle of the circular sleeve protrudes outwards to form a coaxial annular spherical surface, and strip-shaped contraction joints are evenly formed in the circular sleeve in the axial direction. The defects in the prior art are overcome.

Description

Technical Field

[0001] The invention relates to the technical field of a target base for laser tracking measurement, and in particular to an automatic centering target ball support base. Background Art

[0002] The target ball used in existing laser tracking measurement is connected to the measurement section (usually a steel plate) by configuring a magnetic base for fixing the target. The target ball and the base are connected by magnetic attraction. There are usually multiple groups of circular holes in the measurement section as the measurement object to be detected. The target ball base needs to be disassembled and assembled repeatedly, and in order to meet the measurement accuracy requirements, the center of the measurement point needs to be concentric with the measurement circular hole; the measurement circular hole is generally drilled, and there are different degrees of burrs on the edge of the hole. It must be polished and cleaned to remove the burrs during measurement.

[0003] The prior art "bolted target base CN101813477A for laser tracking and measuring instrument" adopts a connecting stud + nut fastening method to connect with the measuring circular hole on the measuring section, and meets the requirements of easy disassembly and assembly and reuse. However, due to the gap between the measuring circular hole and the connecting stud, the concentricity of the stud and the measuring circular hole is poor after the bolt is tightened, which affects the coaxiality of the target ball and the measuring circular hole, and then affects the measurement accuracy and produces errors. Summary of the invention

[0004] The invention provides a target ball supporting base with automatic centering and centering to overcome the shortcomings of the prior art.

[0005] The technical solution adopted by the present invention is: an automatically centered and centering target ball support base, including a support seat and a circular sleeve coaxially arranged below the support seat and elastically deformable, the support seat has a coaxial cylindrical blind hole in the center of the upper end face, the upper end of the cylindrical blind hole expands outward to form a coaxial conical surface, and the bottom of the cylindrical blind hole is equipped with a magnet; the middle part of the circular sleeve convexly forms a coaxial annular spherical surface, and the circular sleeve has axially uniformly distributed strip-shaped shrinkage seams.

[0006] The middle portion of the inner diameter of the circular sleeve expands outwardly following the annular spherical surface.

[0007] The upper and lower sides of the annular spherical surface smoothly transition to the outer diameter of the circular sleeve through curved surfaces.

[0008] The bosses are evenly distributed on the conical surface, and the top surfaces of the bosses are conical surfaces with the same taper as the conical surface.

[0009] The outer diameter of the circular sleeve is smaller than the inner diameter of the measuring circular hole on the measuring bottom plate, and the diameter of the annular spherical surface is larger than the inner diameter of the measuring circular hole.

[0010] An annular groove is coaxially arranged on the lower end surface of the support seat.

[0011] The lower end surface of the support seat is evenly distributed with clamping grooves penetrating the outer diameter of the support seat, and the clamping grooves are penetrating the annular groove.

[0012] Three bosses are provided, and 3-4 strip-shaped contraction seams are provided and open at the lower end of the circular sleeve.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention utilizes the spherical centering principle to realize automatic centering of the target seat and the measuring circular hole, and is convenient for assembly and disassembly, and is convenient for repeated assembly and disassembly. It is also suitable for measuring circular holes of various aperture sizes and different plate thicknesses, and has a low cost of use.

[0015] 2. The present invention forms point contact with the target ball through the conical boss, so that the target ball can be centered more accurately, thereby ensuring measurement accuracy.

[0016] 3. The lower end surface of the support seat of the present invention is provided with an avoidance groove, which can effectively avoid the influence of the flange burr on the top of the measuring circular hole on the installation of the target seat, and avoid the measurement error caused by the interference of the hole edge. At the same time, it reduces the process of deburring and grinding the circular hole before measurement, and improves the measurement efficiency.

[0017] 4. The present invention provides a disassembly slot on the lower end surface of the support seat to achieve quick disassembly and further improve the measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention;

[0019] Figure 2-3 It is a schematic diagram of the three-dimensional structure of the present invention. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1-3 The present invention is described in detail with specific embodiments.

[0021] A target ball support base with automatic centering and centering includes a support base 1 and a circular sleeve 2 coaxially arranged below the support base 1 and elastically deformable, wherein the support base 1 has a cylindrical blind hole 4 coaxially in the center of the upper end surface, the upper end of the cylindrical blind hole 4 expands outward to form a coaxial conical surface 3, and a magnet 5 is installed at the bottom of the cylindrical blind hole 4; the middle part of the circular sleeve 2 convexly forms a coaxial annular spherical surface 6, and the circular sleeve 2 has axially uniformly distributed strip-shaped shrinkage seams 7. The outer diameter of the circular sleeve 2 is smaller than the inner diameter of the measuring circular hole 11-1 on the measuring bottom plate 11, and the diameter of the annular spherical surface 6 is larger than the inner diameter of the measuring circular hole 11-1.

[0022] Furthermore, the middle portion of the inner diameter of the circular sleeve 2 expands outwards following the annular spherical surface 6 , so as to enhance the elastic deformation capability of the circular sleeve 2 .

[0023] Furthermore, the upper and lower sides of the annular spherical surface 6 smoothly transition with the outer diameter of the circular sleeve 2 through the curved surface 6-1, so that the annular spherical surface 6 can be smoothly pressed into the measuring circular hole 11-1.

[0024] Preferably, three or four strip-shaped shrinkage seams 7 are provided and open at the lower end of the circular sleeve 2. The circular sleeve 2 is divided into a three-petal or four-petal structure, and the deformation stiffness and elastic deformation amount of the circular sleeve 2 can be adjusted by different slot widths of the strip-shaped shrinkage seams 7.

[0025] In the above embodiment, the diameter of the annular spherical surface 6 is calculated by the diameter of the measuring circular hole 11-1 + the elastic deformation of the circular sleeve 2. The diameter of the annular spherical surface 6 can be adjusted to accommodate measuring circular holes 11-1 of different diameters.

[0026] In order to ensure and improve the measurement accuracy, bosses 8 are evenly distributed on the conical surface 3, and the top surface of the bosses 8 is a conical surface with the same taper as the conical surface 3. The conical bosses form point contact with the target ball, so that the target ball can be centered more accurately, ensuring the measurement accuracy. Preferably, three bosses 8 are provided.

[0027] In order to effectively avoid the influence of the flange burr on the top of the measuring circular hole on the installation of the present invention and avoid the measurement error caused by the interference of the hole edge, an annular groove 9 is coaxially provided on the lower end surface of the support seat 1.

[0028] Furthermore, three slots 10 are evenly distributed on the lower end surface of the support base 1 and are connected to the outer diameter thereof, so that the disassembly tool can be easily mounted in the slots 10 to achieve quick disassembly. The slots 10 are connected to the annular groove 9 to reduce the contact area between the lower end surface of the support base 1 and the upper end surface of the measuring base plate, thereby avoiding measurement errors caused by the non-vertical installation position of the support base 1.

[0029] The present invention is formed by integrally forming a highly elastic and wear-resistant material, and can be made of metal or non-metal materials. Metal materials such as spring steel can also be heat-treated to increase their surface wear resistance and corrosion resistance in order to ensure repeated use accuracy and prevent wear.

[0030] During specific use, the circular sleeve 2 is inserted into the measuring circular hole 11-1 on the measuring base plate 11, and is pressed hard so that the lower end surface of the support seat 1 is in close contact with the upper end surface of the measuring base plate 11, and the annular spherical surface 6 is compressed. At the same time, under the action of the elastic deformation of the circular sleeve 2 itself, the annular spherical surface 6 is in close contact with the inner diameter of the measuring circular hole 11-1, and the annular spherical surface 6 and the inner diameter of the measuring circular hole 11-1 achieve line contact. The center of the annular spherical surface 6 is automatically aligned and concentric with the center of the measuring circular hole 11-1, so that the support seat 1 and the measuring circular hole 11-1 are automatically concentric. Then, the target ball 12 is placed on the three bosses 8 to accurately center the target ball, and the target ball is adsorbed and fixed by the suction force of the magnet 5, and measurement can be carried out; after the measurement, the disassembly tool is mounted in the card slot 10 to achieve quick disassembly.

[0031] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An automatic centering target ball support base, characterized in that: The invention comprises a support seat (1) and a circular sleeve (2) coaxially arranged below the support seat (1) and capable of elastic deformation. The support seat (1) has a cylindrical blind hole (4) coaxially disposed in the center of the upper end surface. The upper end of the cylindrical blind hole (4) expands outward to form a coaxial conical surface (3). A magnet (5) is mounted at the bottom of the cylindrical blind hole (4). The central part of the circular sleeve (2) convexly forms a coaxial annular spherical surface (6). The circular sleeve (2) has axially uniformly distributed strip-shaped shrinkage seams (7).

2. The target ball support base with automatic centering according to claim 1 is characterized in that: The middle portion of the inner diameter of the circular sleeve (2) expands outwards following the annular spherical surface (6).

3. The target ball support base with automatic centering according to claim 1 is characterized in that: The upper and lower sides of the annular spherical surface (6) smoothly transition to the outer diameter of the circular sleeve (2) through the curved surface (6-1).

4. The target ball support base with automatic centering according to claim 1 is characterized in that: The bosses (8) are evenly distributed on the conical surface (3), and the top surface of the bosses (8) is a conical surface with the same taper as the conical surface (3).

5. The target ball support base with automatic centering according to claim 1 is characterized in that: The outer diameter of the circular sleeve (2) is smaller than the inner diameter of the measuring circular hole (11-1) on the measuring bottom plate (11), and the diameter of the annular spherical surface (6) is larger than the inner diameter of the measuring circular hole (11-1).

6. The target ball support base with automatic centering according to claim 1 is characterized in that: An annular groove (9) is coaxially provided on the lower end surface of the support seat (1).

7. The target ball support base with automatic centering according to claim 6 is characterized in that: The lower end surface of the support seat (1) is evenly distributed with clamping grooves (10) that penetrate the outer diameter of the support seat (1), and the clamping grooves (10) penetrate the annular groove (9).

8. The target ball support base with automatic centering according to any one of claims 1 to 5, characterized in that: Three bosses (8) are provided, and 3-4 strip-shaped contraction seams (7) are provided and open at the lower end of the circular sleeve (2).

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