CN115921623B

CN115921623B - A self-rebound universal mandrel

Info

Publication number: CN115921623B
Application number: CN202211682813.4A
Authority: CN
Inventors: 刘尔方; 谢培钧; 赵铖亿; 吴烨; 鹿康; 陆昌勇; 姜欣研; 韩雨磨
Original assignee: Jiangsu Yaokun Hydraulic Co ltd
Current assignee: Jiangsu Yaokun Hydraulic Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2026-01-30
Anticipated expiration: 2042-12-27
Also published as: CN115921623A

Abstract

The invention relates to a self-rebound universal core rod which comprises a core rod main body and a plurality of universal ball core heads connected with the core rod main body, wherein one end of the core rod main body is provided with a ball socket which is matched and connected with a universal ball, the plurality of universal ball core heads are sequentially connected end to end through a ball socket structure, a steering gap is reserved between the adjacent universal ball core heads, the side wall of each universal ball core head is an anti-deformation contact surface which is matched and contacted with the inner wall of a bent pipe, and rebound components are arranged between the adjacent universal ball core heads and between the universal ball core heads and the core rod main body. Through the arrangement of the rebound component, the core rod can be ensured to naturally ensure a straightened state under the condition of no external force interference.

Description

Self-rebound universal core rod

Technical Field

The invention relates to a self-rebound universal core rod.

Background

At present, in order to avoid flattening distortion of a pipe body, a supporting core rod is plugged into the pipe body, the supporting core rod can play a supporting role on the inner wall of the pipe body, and collapse and distortion of an elbow interface are well reduced. However, the existing core rods are all connected through universal balls (for example, the technical scheme disclosed in patent number CN 200810079974.8), the core rod is bent irregularly in a natural state, and when a pipe body is sleeved into the universal core rod, an operator is required to straighten the core rod first, so that the operation is inconvenient. Especially under the big background of intelligent linking in present workshop, the cup joint of pipeline and plug is accomplished through robotic arm, is in the state of being in straight line under the natural state of the plug of needs assurance, and the manipulator of being convenient for accomplishes the cup joint of body and plug, improves production efficiency. The prior art has an urgent need for a self-rebound universal core rod which is in a straightened state under the state of no external force.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a self-rebound universal core rod in a straightened state without external force.

In order to achieve the above purpose, the technical scheme of the invention provides a self-rebound universal core rod, which comprises a core rod main body and a plurality of universal ball core heads connected with the core rod main body, wherein one end of the core rod main body is provided with a ball socket which is matched and connected with a universal ball;

and rebound parts are arranged between the adjacent universal ball core heads and between the universal ball core heads and the core rod main body.

Through the arrangement of the rebound component, the core rod can be ensured to naturally ensure a straightened state under the condition of no external force interference.

Preferably, the rebound member is annular, and the rebound member is filled between the universal ball core heads or between the universal ball core heads and the mandrel body.

By such a design, one is optimizing the resilient member.

Preferably, the resilient member is in an undeformed state or a compressed state when the universal core rod is in a straight state.

By means of the design, the rebound part is guaranteed to be stressed and deformed under the condition that the core rod is bent, and therefore the core rod is driven to be straightened.

Preferably, the resilient member is an elastic rubber ring or a spring member.

By such design, the elastic component structure is rich.

Preferably, the rebound member is an elastic rubber ring, and the rubber ring is made of polyurethane.

By such design, resilience and service life of the resilient member are ensured.

Preferably, the resilient member is hollow or solid.

By such design, the elastic component structure is rich.

Preferably, the spring component comprises a plurality of cylindrical springs, the plurality of cylindrical springs are arrayed around to form a ring shape, and the plurality of cylindrical springs are in limit connection through a connecting bracket.

By such design, the elastic component structure is rich.

Preferably, the inner wall of the universal ball core head and/or the core rod main body is provided with a limit groove for accommodating the elastic rubber ring.

Through such design, can make the elastic rubber ring connect more stable.

Preferably, the surface of the elastic rubber ring, which is matched with the universal ball core head or the core rod main body, is provided with a convex inclined surface, one end of the convex inclined surface is a starting end, the convex inclined surface is flush with the surface of the elastic rubber ring, the other end of the convex inclined surface is a convex end, the convex inclined surface is higher than the surface of the elastic rubber ring, the height difference between the starting end and the convex end is gradually transited, and the convex inclined surface and the elastic rubber ring are coaxially arranged.

Through such design, can make elastic rubber ring rotate around the axle center, when elastic rubber ring is extrudeed, different positions all can be extruded, avoid local position to extrude repeatedly and tired, resilience force detracts from even inefficacy, is favorable to improving the life of whole plug, and stability.

Preferably, the convex inclined surfaces are arranged in a plurality of groups around the elastic rubber ring, and the inclination angle of the convex inclined surfaces is 0.1 to 1 degree.

Through the design, the small-angle rotation can be realized on the premise of ensuring resilience force.

The invention has the advantages that through the design, the setting of the rebound part can ensure that the core rod naturally ensures a straightened state under the condition of no external force interference, thereby being convenient for the grabbing and sleeving of the mechanical arm.

Drawings

FIG. 1 is a schematic view of a universal core rod according to the present invention;

FIG. 2 is a view of the gimbal of the present invention schematic cross-sectional view of the core rod structure;

FIG. 3 is a schematic diagram of a universal core explosion structure of the present invention;

FIG. 4 is a schematic view showing the structure of a rebound member according to embodiment 1 of the present invention;

FIG. 5 is a schematic view of the structure of a rebound member (with convex ramp) according to embodiment 3 of the present invention;

FIG. 6 is a schematic view of the structure of a rebound member (a plurality of cylindrical springs) according to embodiment 2 of the present invention;

FIG. 7 is a schematic view of the structure of a rebound member according to embodiment 2 of the present invention (a plurality of cylindrical springs, side view);

fig. 8 is an enlarged schematic view of the structure a in fig. 7.

In the figure, 1, a core rod main body, 2, a universal ball core head, 3, a ball socket, 4, a steering gap, 5, an anti-deformation contact surface, 6, a rebound part, 7, a limit groove, 8, a convex inclined plane, 9, a starting end, 10, a convex end, 11, a cylindrical spring, 12 and a connecting bracket.

Detailed Description

The following describes the embodiments of the present invention further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.

As shown in fig. 1 to 8, embodiment 1, a self-rebound universal core rod, comprises a core rod main body 1 and a plurality of universal ball core heads 2 connected with the core rod main body 1, wherein one end of the core rod main body 1 is provided with a ball socket 3 which is matched and connected with a universal ball, the plurality of universal ball core heads 2 are sequentially connected end to end through the ball socket 3 structure, a steering gap 4 is reserved between the adjacent universal ball core heads 2, and the side wall of each universal ball core head 2 is an anti-deformation contact surface 5 which is matched and contacted with the inner wall of an elbow;

a rebound member 6 is provided between the adjacent universal core pieces 2 and between the universal core pieces 2 and the mandrel body 1.

The rebound member 6 is annular, and the rebound member 6 is filled between the universal ball core heads 2 or between the universal ball core heads 2 and the mandrel main body 1.

In the straight state of the universal core rod, the rebound member 6 is in an undeformed state or a compressed state.

The resilient member 6 is an elastic rubber ring or a spring member.

The rebound member 6 is an elastic rubber ring, and the rubber ring is made of polyurethane.

The resilient member 6 is hollow or solid.

The inner wall of the universal ball core head 2 and/or the core rod main body 1 is provided with a limit groove 7 for accommodating the elastic rubber ring.

When the universal ball core head is used, the pipe body is sleeved outside the core rod, and when the pipe body is bent, the core rod is bent along the bending direction of the pipe body due to the fact that the pipe body presses the core rod, but the supporting position outside the universal ball core head 2 can support the inside of the pipe body, and deformation of the pipe body is prevented. For example, the initial states of two adjacent universal ball core heads 2 are arranged in a straight line, but after extrusion, one side is close to the other side, and one side of an elastic rubber ring between the two adjacent universal ball core heads 2 is extruded and deformed, after the whole pipe bending process is finished, the core rod is pulled out of the pipe body, one side of the elastic rubber ring is rebounded, and the two adjacent universal ball core heads 2 are jacked back to the original initial state. After all the universal ball core head 2 paper pieces are operated according to the steps, the core rod drawn out of the pipe body can be naturally straightened, and subsequent grabbing and sleeving of the pipe body are facilitated. And the production efficiency is improved.

The embodiment 2 is further optimized for the embodiment 1, and is characterized in that a convex inclined surface 8 is arranged on the surface of the elastic rubber ring, which is matched with the universal ball core head 2 or the mandrel main body 1, one end of the convex inclined surface 8 is a starting end 9, which is flush with the surface of the elastic rubber ring, the other end of the convex inclined surface 8 is a convex end 10, which is higher than the surface of the elastic rubber ring, a convex inclined surface 8 with gradually transitional height difference is arranged between the starting end 9 and the convex end 10, and the convex inclined surface 8 and the elastic rubber ring are coaxially arranged.

The convex inclined planes 8 are arranged in a plurality of groups around the elastic rubber ring, and the inclination angle of the convex inclined planes 8 is 0.1 to 1 degree.

Because bending of the pipe body belongs to batch production, when the same batch of products are produced, bending operation at the same position exists, the universal ball core head 2 and the elastic rubber ring at the same position of the core rod are extruded, the extruded position and angle are the same and similar, local fatigue damage can be caused to the elastic rubber ring, in order to avoid the occurrence of the situation, through the arrangement of the convex inclined plane 8, the elastic rubber ring rotates around the axial direction while extruding, so that the local fatigue damage of the same elastic rubber ring can be avoided, the service life and rebound stability of the rubber ring are improved, and the service life and rebound stability of the whole core rod are also improved.

Since the protruding end 10 of the protruding inclined surface 8 is higher than the surface of the elastic rubber ring, a part of the filling volume of the rebound material is lost in terms of the rebound resilience of the whole elastic rubber ring, so that the rotation requirement can be met in order to ensure the filling amount of the elastic rubber ring, and only a small-angle inclination angle can be selected.

The starting ends 9 and the protruding ends 10 are alternately arranged in turn around the elastic rubber ring, so that the elastic rubber ring substrate rotates in one direction (clockwise or counterclockwise), and the probability that each region of the same elastic rubber ring is extruded tends to be uniform.

In embodiment 3, the spring component comprises a plurality of cylindrical springs 11, the plurality of cylindrical springs 11 are arrayed around to form a ring shape, and the plurality of cylindrical springs 11 are in limit connection through a connecting bracket 12.

The rebound of the cylindrical spring 11 is also an implementation manner, for example, the initial states of two adjacent universal ball core heads 2 are arranged in a straight line, but one side is close after extrusion, the cylindrical spring 11 between the two adjacent universal ball core heads 2 is extruded and deformed, when the whole pipe bending process is finished, the core rod is pulled out of the pipe body, the cylindrical spring 11 rebounds, and the two adjacent universal ball core heads 2 are jacked back to the original initial states. This configuration is somewhat more complex than the configurations of embodiments 1 and 2, but has a longer service life.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.

Claims

1. The self-rebound universal core rod is characterized by comprising a core rod main body (1) and a plurality of universal ball core heads (2) connected with the core rod main body (1), wherein one end of the core rod main body (1) is provided with a ball socket (3) which is matched and connected with a universal ball, the universal ball core heads (2) are sequentially connected end to end through a ball socket (3) structure, a steering gap (4) is reserved between the adjacent universal ball core heads (2), and the side wall of each universal ball core head (2) is an anti-deformation contact surface (5) which is matched and contacted with the inner wall of an elbow;

Elastic rubber rings are arranged between the adjacent universal ball core heads (2) and between the universal ball core heads (2) and the core rod main body (1);

limiting grooves (7) for accommodating elastic rubber rings are formed in the inner walls of the universal ball core head (2) and the core rod main body (1);

The surface of the elastic rubber ring, which is matched with the universal ball core head (2) or the core rod main body (1), is provided with a convex inclined surface (8), one end of the convex inclined surface (8) is a starting end (9) which is flush with the surface of the elastic rubber ring, the other end of the convex inclined surface is a convex end (10) which is higher than the surface of the elastic rubber ring, and a convex inclined surface (8) with gradually transitional height difference is arranged between the starting end (9) and the convex end (10);

The elastic rubber ring is characterized in that a plurality of groups of protruding inclined planes (8) are arranged around the elastic rubber ring, the starting ends (9) and the protruding ends (10) are sequentially and alternately arranged around the elastic rubber ring, the protruding inclined planes (8) and the elastic rubber ring are coaxially arranged, and the inclination angle of the protruding inclined planes (8) is 0.1-1 degrees.

2. The self-rebounding universal core rod as claimed in claim 1, wherein the elastic rubber ring is in an undeformed state or a compressed state when the universal core rod is in a straight state.

3. The self-rebounding universal core rod as claimed in claim 1, wherein the elastic rubber ring is made of polyurethane.