CN111299633A

CN111299633A - Tension device

Info

Publication number: CN111299633A
Application number: CN202010308310.5A
Authority: CN
Inventors: 赵连凯; 李金年; 张召远
Original assignee: Shengrui Transmission Co Ltd
Current assignee: Shengrui Transmission Co Ltd
Priority date: 2020-04-18
Filing date: 2020-04-18
Publication date: 2020-06-19

Abstract

The invention discloses a tensioner which comprises a disc, wherein a jacking device which is used for contacting and fixing the inner wall of a workpiece is arranged on the disc; the driving device is used for driving the jacking device to move along the disc in the radial direction, and the bolt is in threaded connection with the truncated cone, so that the threads are convenient to replace after being worn; the expansion angle is in a broad bean shape, two high points of the expansion angle are in contact with the inner wall of the product, and the contact surface is large after the two points are in contact, so that the product is prevented from deforming in the expansion process. The expansion angle is hinged with the supporting rod, so that the flexibility is ensured, the contact surface of the product is prevented from being elliptical or uneven, the self-adjustment is convenient, and the matching surface is automatically adjusted; the circle center of the combination area can be automatically adjusted and aligned, the circle center can be used within 1 mm of roundness, and the diameter range can be used within 10 mm of tolerance; the clamping is simple and firm, and the product cannot be thrown out by rotation; the purpose of effectively improving the turning speed, the product quality and the service life is suitable for processing the bent pipe products.

Description

Tension device

Technical Field

The invention belongs to the technical field of internal combustion engines, and particularly relates to a tensioner and a processing method thereof.

Background

The installation matching area of the internal combustion engine exhaust elbow and the pipe connecting piece needs to be connected through a round clamping sleeve, the precision requirement of a machining area is strict, machining is usually carried out after clamping and fixing, but the pipe wall of the area is too thin and irregular, deformation is caused, clamping is not easy to exert force, the machining can be carried out only through a lathe at a low rotating speed and slow feeding, the clamping force is influenced by the consistency of products, the machining speed is controlled only by experience, the cost is increased, and the qualification rate is low.

Disclosure of Invention

The invention aims to provide a tensioner, which overcomes the defects in the prior art, achieves the purposes of improving the product quality, the turning speed and the service life after the tensioner is adopted, and is suitable for processing bent pipe products.

In order to solve the technical problems, the technical scheme of the invention is as follows: the tensioner is characterized by comprising a disc, wherein the disc is provided with:

the jacking device is used for contacting and fixing the inner wall of the workpiece;

and the driving device is used for driving the jacking device to move along the disc in the radial direction.

Furthermore, the jacking device comprises a plurality of through grooves uniformly formed in the disc, the through grooves are radially formed in the disc, supporting rods are arranged in the through grooves, one ends of the supporting rods are in contact with the truncated cone, and hinged expansion angles are arranged at the other ends of the supporting rods.

Furthermore, the rising horns are in the shape of silkworms.

Furthermore, one end of the supporting rod is provided with an inclined plane which is contacted with the conical table surface and is matched with the inclination of the conical table.

Further, the plane of the expansion angle is perpendicular to the disc.

Further, the driving device comprises a through hole arranged in the center of the disc, a fixing block is arranged at the bottom of the disc at the position of the through hole, an inverted cone frustum is arranged in the through hole, a bolt is arranged between the fixing block and the cone frustum, one end of the bolt is in threaded connection with the cone frustum, and the other end of the bolt is fixed with the fixing block.

Furthermore, the lower bottom of the cone frustum is provided with an adjusting block.

Further, still include stop device for the displacement of limited support rod in logical inslot.

Furthermore, the limiting device comprises a positioning bolt arranged on the supporting rod, a limiting groove communicated with the through groove is formed in the disc, and the positioning bolt penetrates through the limiting groove to be fixed on the supporting rod.

By adopting the technical scheme, compared with the prior art, the invention has the following advantages: the bolt is in threaded connection with the cone frustum, so that the thread is convenient to replace after being worn.

The expansion angle is in a broad bean shape, two high points of the expansion angle are in contact with the inner wall of the product, and the contact surface is large after the two points are in contact, so that the product is prevented from deforming in the expansion process. The expansion angle is hinged with the supporting rod, so that the flexibility is ensured, the contact surface of the product is prevented from being elliptical or uneven, the self-adjustment is convenient, and the matching surface is automatically adjusted; the center of the combination area can be automatically adjusted and aligned, the circle can be used within 1 mm of roundness, and the diameter can be used within 10 mm of tolerance.

The clamping is simple and firm, and the product cannot be thrown out by rotation.

The purpose of effectively improving the turning speed, the product quality and the service life is suitable for processing the bent pipe products.

Drawings

FIG. 1 is a schematic structural diagram of a tensioner in an embodiment of the invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a using state diagram of the tensioner in the embodiment of the invention;

in the figure, the position of the upper end of the main shaft,

1-disc, 2-through hole, 3-fixed block, 4-truncated cone, 5-bolt, 6-adjusting block, 7-support rod, 8-expansion angle, 9-positioning bolt, 10-limit groove and 11-bent pipe.

Detailed Description

In order to more clearly understand the technical features, objects and effects of the present invention, the embodiments of the present invention will be described with reference to the accompanying drawings, and it will be understood by those skilled in the art that the following should not be construed as limiting the scope of the present invention.

In the embodiment, as shown in fig. 1 to 3, a tensioner comprises a disc 1, wherein the disc 1 is provided with:

and the driving device is used for driving the jacking device to move along the radial direction of the disc 1.

The driving device comprises a through hole 2 formed in the center of the disc 1, a fixing block 3 is arranged at the bottom of the disc 1 at the position of the through hole 2, an inverted cone frustum 4 is arranged in the through hole 2, the cone frustum 4 can move up and down along the through hole 2, a bolt 5 is arranged between the fixing block 3 and the cone frustum 4, one end of the bolt 5 is in threaded connection with the cone frustum 4, the other end of the bolt 5 is fixed with the fixing block 3 through a nut, and an adjusting block 6 is arranged on the lower bottom of the cone frustum 4.

The jacking device comprises a plurality of through grooves uniformly formed in the disc 1, a supporting rod 7 is arranged in each through groove, the supporting rod 7 can move in the radial direction along each through groove, one end of each supporting rod 7 is provided with an inclined plane in surface contact with the circular truncated cone 4 and matched with the inclination of the circular truncated cone 4, the other end of each supporting rod 7 is provided with a hinged expansion angle 8, each expansion angle 8 is located on the circumference of the disc 1, each expansion angle 8 is broad bean-shaped, and the plane where each expansion angle 8 is located is perpendicular to the plane where the disc 1 is located.

A limiting device: the supporting rod 7 is provided with a positioning bolt 9, the disc 1 is provided with a limiting groove 10 communicated with the through groove, and the positioning bolt 9 penetrates through the limiting groove 10 to be fixed on the supporting rod 7.

The using method comprises the following steps:

the tensioner is placed in a bent pipe 11 to be processed, the rotating adjusting block 6 drives the cone frustum 4 to move downwards on the bolt 5 and contact with one end of the supporting rod 7 with an inclined surface, the supporting rod 7 moves radially, and the bent pipe 11 is clamped after the expansion angle 8 contacts with the inner wall of the bent pipe 11.

As a specific product, the number of the support rods 7 is 12, the inclination angle of the inclined plane of the support rods 7 is 20 degrees, and the bolt 5 is not integrated with the truncated cone 4, so that the threads are convenient to replace after being worn; the expansion angle 8 is in a broad bean shape, two high points of the expansion angle are in contact with the inner wall of the product, and the contact surface is large after the two points are in contact, so that the product is prevented from deforming in the expansion process; the expansion angle 8 is hinged with the support rod 7, so that the flexibility is ensured, the contact surface of a product is prevented from being elliptical or not flat, the self-adjustment is convenient, and the matching surface is automatically adjusted; automatically adjusting and aligning the circle center of the combination area; the tensioner can be self-centering adjusted, can be used within 1 mm of roundness, and can be used within 10 mm of tolerance in diameter range. The clamping is simple and firm, and the workpiece cannot be thrown out due to rotation of the workpiece.

The foregoing is illustrative of the best mode of the invention and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The scope of the present invention is defined by the appended claims, and any equivalent modifications based on the technical teaching of the present invention are also within the scope of the present invention.

Claims

1. The utility model provides a tensioner which characterized in that, includes disc (1), is equipped with on disc (1):

and the driving device is used for driving the jacking device to move along the radial direction of the disc (1).

2. The tensioner according to claim 1, wherein: the jacking device comprises a plurality of through grooves uniformly formed in the disc (1), the through grooves are radially arranged in the disc (1), supporting rods (7) are arranged in the through grooves, one ends of the supporting rods (7) are in contact with the truncated cone (4), and hinged expansion angles (8) are arranged at the other ends of the supporting rods (7).

3. The tensioner according to claim 2, wherein: the expansion angle (8) is in a broad bean shape.

4. The tensioner according to claim 2, wherein: one end of the supporting rod (7) is provided with an inclined plane which is in surface contact with the truncated cone (4) and is matched with the inclination of the truncated cone (4).

5. The tensioner according to claim 2, wherein: the plane of the expansion angle (8) is vertical to the disc (1).

6. The tensioner according to claim 1, wherein: the driving device comprises a through hole (2) formed in the center of the disc (1), a fixing block (3) is arranged at the bottom of the disc (1) at the position of the through hole (2), an inverted cone frustum (4) is arranged in the through hole (2), a bolt (5) is arranged between the fixing block (3) and the cone frustum (4), one end of the bolt (5) is in threaded connection with the cone frustum (4), and the other end of the bolt (5) is fixed with the fixing block.

7. The tensioner according to claim 6, wherein: the lower bottom of the cone frustum (4) is provided with an adjusting block (6).

8. The tensioner according to claim 2, wherein: the device also comprises a limiting device used for limiting the moving distance of the supporting rod (7) in the through groove.

9. The tensioner of claim 8, wherein: the limiting device comprises a positioning bolt (9) arranged on the supporting rod (7), a limiting groove (10) communicated with the through groove is formed in the disc (1), and the positioning bolt (9) penetrates through the limiting groove (10) to be fixed on the supporting rod (7).