CN205333543U - Positioning jig for checking defects on the outer surface of pillars - Google Patents

Abstract

The utility model discloses a positioning fixture for inspecting defects on the outer surface of a columnar object, which is characterized by comprising: a mounting chassis with a through hole in the middle for the columnar object to pass through; a support body assembly arranged on the mounting chassis and arranged in a uniform array along the outer periphery of the mounting chassis; a conveying wheel assembly arranged on the inner side of the support assembly, connected to the support assembly and moving synchronously, and used to clamp and transport the columnar object. The positioning fixture described in the utility model can quickly adapt to columnar objects of different diameters, clamp and transport the columnar object through the conveying wheel assembly, and cooperate with the support body assembly to achieve synchronous movement, and keep the axis position of columnar objects of different diameters unchanged, which provides good conditions for machine vision technology to quickly inspect defects on the outer surfaces of columns of different diameters.

Description

Positioning jig for checking defects on the outer surface of pillars

technical field

The utility model relates to a positioning fixture for inspection, in particular to a positioning fixture for checking defects on the outer surface of a column.

Background technique

When using machine vision technology to quickly inspect the defects on the outer surface of pillars, the pillars need to be clamped and conveyed, and the conveying device is required to quickly adapt to pillars with different diameters and keep the axis position of pillars with different diameters unchanged , to ensure that multiple cameras around the column have the same object distance. At present, the traditional rapid inspection method of using V-shaped or U-shaped wheels for clamping and conveying cannot guarantee that the axes of pillars with different diameters will not change, which will affect the accuracy of the inspection results. Therefore, it is urgent to provide a positioning fixture for inspection that can quickly adapt to pillars of different diameters, that is, the self-adaptive function, and keep the axial center position of pillars of different diameters unchanged, that is, the centering function, so as to meet the requirements of rapid inspection. need.

Utility model content

According to the technical problem raised above, a positioning fixture for inspecting defects on the outer surface of a column is provided. The utility model realizes synchronous movement mainly through the connection and cooperation of the conveying wheel assembly and the support body assembly, and the diameter of the inscribed circle surrounded by the conveying wheel is variable, and the center of the circle is unchanged, so that the column is clamped along the It has the effect of centering and keeping the axis center when the conveying axis moves. Therefore, it is suitable for the centering and axial conveying of columns with various diameters.

The technical means adopted in the utility model are as follows:

A positioning fixture for inspecting defects on the outer surface of a column, characterized by comprising:

A middle part is provided with the installation chassis that can pass through the hole for described column;

A support body assembly arranged on the installation chassis and arranged in a uniform array along the outer periphery of the installation chassis;

A conveying wheel assembly arranged inside the support assembly, connected with the support assembly and moving synchronously, for clamping and conveying the column.

Further, the supporting assembly includes a plurality of supporting bodies and a connecting rod for connecting every two adjacent supporting bodies;

The support body is provided with a hole for the shaft of the support body to pass through in the direction close to the axial center of the circle. The shaft of the support body passes through the hole and is fixed in the shaft installation hole of the support body on the installation chassis. The body can freely rotate with the rotating shaft of the support body as the axis;

The supporting body is also provided with a first connecting rod rotating shaft passing hole I and a second connecting rod rotating shaft passing hole II, and the passing hole I and the passing hole II are arranged on two sides of the hole for the supporting body rotating shaft to pass through. side, the distance from the hole I and the hole II to the hole is the same; the rotation axis of the first connecting rod and the rotating shaft of the second connecting rod respectively pass through the connecting rod on the connecting rod and its adjacent supporting body The rotating shafts are connected; the plurality of connected supporting bodies can simultaneously rotate at the same angle with the respective supporting body rotating shafts as axes.

Further, the delivery wheel assembly includes a delivery wheel shaft fixed by a wheel shaft support arranged on one side of the support body, the other end of the delivery wheel shaft is fixed to the inner ring of the delivery wheel bearing, and the outer ring of the delivery wheel bearing The ring is fixed to the bearing seat of the conveying wheel, and the conveying wheel is fixed concentrically with the bearing of the conveying wheel, and the conveying wheel can freely rotate on the axis of the conveying wheel; the inscribed circle surrounded by a plurality of conveying wheels can be clamped and supplied The conveyed pillars of different diameters pass through; a support for providing clamping force for the conveying wheel assembly is also connected and fixed on the axle support of one of the supports, and the other end of the support is connected to the support. The above-mentioned installation chassis is connected and fixed.

Further, the delivery wheel assembly includes 3 or more sets of delivery wheels, and the number of the delivery wheels matches the support body.

Further, the mounting holes of the supporting body rotating shaft on the mounting chassis are arranged at equal intervals along the outer circumference of the through hole of the mounting plate.

Compared with the prior art, the utility model maintains synchronous movement with several conveying wheel assemblies connected by connecting rods to realize the inscribed circle surrounded by the conveying wheels, that is, the diameter of the conveyed column is variable and the center of the circle remains unchanged. And when the conveyed column moves along its own axis direction, the conveying wheel rolls passively with less frictional resistance, and provides clamping force for the conveying wheel set through the support.

The utility model has the following advantages:

The utility model is used for centering and axially conveying columns with various diameters. When using machine vision technology to quickly inspect the defects on the outer surface of the column, the column can be clamped and transported, and the conveying device can quickly adapt to columnar objects of different diameters, and keep the axis position of the columnar objects of different diameters unchanged , to ensure that multiple cameras around the column have the same object distance. The utility model can quickly adapt to columnar objects with different diameters, that is, self-adaptive function; and keep the axis position of columnar objects with different diameters unchanged, that is, the centering function, which provides machine vision technology for quickly inspecting defects on the outside of columnar objects with different diameters good conditions.

Based on the above reasons, the utility model can be widely promoted in the field of machine vision detection, or in other conveying fields that need to quickly convey the clamped objects along the coaxial axis.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Fig. 1 is a structural diagram of a large-diameter column clamped by a positioning jig for inspecting defects on the outer surface of a column of the present invention.

Fig. 2 is a schematic diagram of the installation chassis of the present invention.

Fig. 3 is a perspective view of a large-diameter column clamped by the positioning jig for inspecting defects on the outer surface of the column of the present invention.

Fig. 4 is a structural schematic diagram of a small-diameter column clamped by the positioning jig for inspecting the defects on the outer surface of the column of the present invention.

Fig. 5 is a perspective view of a small-diameter column clamped by the positioning jig for inspecting defects on the outer surface of the column of the present invention.

In the figure: 1, installation chassis 11, supporting body rotating shaft installation hole 12, through hole 2, supporting assembly 21, supporting body 22, supporting body rotating shaft 23, first connecting rod rotating shaft 24, second connecting rod rotating shaft 25, connecting rod 26 , Axle support 27, support 3, delivery wheel assembly 31, delivery wheel shaft 32, delivery wheel bearing 33, delivery wheel bearing block 34, delivery wheel 4, column.

detailed description

As shown in Figures 1-3, a positioning fixture for inspection of defects on the outer surface of a column includes:

The middle part is provided with an installation chassis 1 through holes 12 through which the columnar object 4 can pass; Divide the installation chassis 1 equally for the four supporting body shaft installation holes 11, and set the spacing to be Lmm.

Support body assemblies 2 arranged on the installation chassis 1 and arranged in a uniform array along the outer circumference of the installation chassis 1;

The supporting assembly 2 includes four supporting bodies 21 and a connecting rod 25 for connecting every adjacent two supporting bodies 21;

The support body 21 is a cube, and a hole for the support body rotating shaft 22 to pass is provided at a corner position of a cube in the direction close to the axial center of the circle, and the support body rotating shaft 22 passes through the hole and is fixed on the Installed on the chassis 1, the support body 21 can freely rotate with the support body rotating shaft 22 as the axis;

The supporting body 21 is also provided with a first connecting rod rotating shaft 23 passing hole I and a second connecting rod rotating shaft 24 passing hole II, and the passing hole I and the passing hole II are provided for the supporting body rotating shaft 22 to pass through. On both sides of the hole, the distance from the hole I and the hole II to the hole is the same, and in this embodiment, it is set at two corners opposite to the cube; the first connecting rod shaft 23 and the second connecting rod rotating shaft 24 are connected to each other through the connecting rod rotating shaft on the adjacent supporting body 21 through the connecting rod 25; The axes are rotated by the same angle. The length of the connecting rod 25 is also Lmm.

The conveying wheel assembly 3 is arranged inside the support assembly 2 , is connected with the support assembly 2 and moves synchronously, and is used for clamping and conveying the column 4 .

The delivery wheel assembly 3 includes a delivery wheel shaft 31 fixed by a wheel shaft support 26 arranged on one side of the support body 21, the other end of the delivery wheel shaft 31 is fixed on the inner ring of the delivery wheel bearing 32, and the delivery wheel The outer ring of the bearing 32 is fixed with the delivery wheel bearing seat 33, and the delivery wheel 34 is concentrically fixed with the delivery wheel bearing 32, and the delivery wheel 34 can rotate freely on the delivery wheel shaft 31; a plurality of delivery wheels 34 surround The formed inscribed circle can be clamped and passed through by conveyed columns 4 of different diameters; on the axle support 26 of one of the support bodies 21, there is also connected and fixed for providing clamping for the conveying wheel assembly 3 The support 27 of force, the other end of the support 27 is connected and fixed with the installation chassis 1 .

In the utility model, the conveying wheel assembly can maintain synchronous movement through connecting rods to realize the inscribed circle surrounded by the conveying wheel, that is, the diameter of the conveyed column can be changed, and the center of the circle can not be changed. And when the conveyed column moves along its own axis direction, the conveying wheel rolls passively with less frictional resistance, and provides clamping force for the conveying wheel set through the support.

Taking the L length as 130mm as an example, the utility model can clamp and transport a columnar object with a diameter of 5-50mm, as shown in Figure 4 and Figure 5, which are schematic diagrams of the utility model clamping a small-diameter columnar object.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. Any equivalent replacement or change of the new technical solution and the concept of the utility model shall be covered by the protection scope of the utility model.

Claims (5)

1. A positioning fixture for inspection of defects on the outer surface of a column, characterized in that it comprises: An installation chassis (1) with a passage hole (12) in the middle for the column (4) to pass through; a support assembly (2) arranged on the installation chassis (1) and arranged in a uniform array along the outer circumference of the installation chassis (1); A conveying wheel assembly (3) arranged inside the support assembly (2), connected with the support assembly (2) and moving synchronously, for clamping and conveying the column (4). 2. The positioning jig for inspecting defects on the outer surface of a column according to claim 1, characterized in that: the supporting assembly (2) includes a plurality of supporting bodies (21) and is used to connect two adjacent supporting bodies The connecting rod (25) of (21); The support body (21) is provided with a hole for the support body rotating shaft (22) to pass through in the direction close to the axial center, and the support body rotating shaft (22) passes through the hole and is fixed on the installation chassis (1) In the supporting body rotating shaft mounting hole (11) on the top, the supporting body (21) can freely rotate with the supporting body rotating shaft (22) as the axis; The supporting body (21) is also provided with a first connecting rod rotating shaft (23) passing hole I and a second connecting rod rotating shaft (24) passing hole II, and the passing hole I and the passing hole II are arranged for On both sides of the hole through which the support shaft (22) passes, the distance from the hole I to the hole II is the same; the first connecting rod rotating shaft (23) and the second connecting rod rotating shaft ( 24) Link to each other through the connecting rod rotating shafts on the adjacent supporting bodies (21) through the connecting rods (25); a plurality of connected supporting bodies (21) can be connected with their respective supporting body rotating shafts (22) simultaneously. The axes are rotated by the same angle. 3. The positioning jig for inspecting defects on the outer surface of a column according to claim 2, characterized in that: the conveying wheel assembly (3) includes a wheel axle support (26) arranged on one side of the support body (21) ) fixed delivery wheel shaft (31), the other end of the delivery wheel shaft (31) is fixed on the inner ring of the delivery wheel bearing (32), the outer ring of the delivery wheel bearing (32) and the delivery wheel bearing seat (33) Fixed, the delivery wheel (34) is concentrically fixed with the delivery wheel bearing (32), and the delivery wheel (34) can rotate freely on the delivery wheel shaft (31); a plurality of delivery wheels (34) enclose The inscribed circle can be clamped and passed by conveyed columns (4) of different diameters; on the axle support (26) of one of the support bodies (21), there is also a fixed connection for the conveying wheel The component (3) provides a support (27) with a clamping force, and the other end of the support (27) is connected and fixed to the installation chassis (1). 4. The positioning jig for inspecting defects on the outer surface of a column according to claim 3, characterized in that: the conveying wheel assembly (3) includes 3 or more sets of conveying wheels (34), and the conveying wheels (34) The quantity matches with the support body (21). 5. The positioning jig for inspecting defects on the outer surface of a column according to claim 1, characterized in that: the support shaft mounting hole (11) on the mounting chassis (1) is along the mounting plate (1) The outer circumferences of the holes (12) are equidistantly arranged.