CN201799976U

CN201799976U - Inner circle wrench

Info

Publication number: CN201799976U
Application number: CN201020525122XU
Authority: CN
Inventors: 常士章
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-09-11
Filing date: 2010-09-11
Publication date: 2011-04-20
Anticipated expiration: 2020-09-11

Abstract

The utility model discloses an inner circle wrench, comprising a cylindrical frame body, the side face of the frame body is fixedly connected with a wrench rod, the inner wall of the frame body is axially and uniformly provided with several through grooves, the cross section of each through groove is in the shape of a circular arc long strip with a semicircle at the two ends, the through grooves are in the plane of the frame body end face and are arranged along an Achimedean spiral with the circle center of the frame body as the center, a bearing is disposed in each through groove, one end face of the frame body is provided with an end cover, the position of the end cover corresponding to the bearing is provided with a sliding chute, the two sides of the frame body are respectively connected with one end of a spring, the other end of the spring is connected with the end cover, one end of an inner roller of the bearing is clamped on the sliding chute, the other end of the inner roller of the bearing is fixedly connected with a contact rod. Via disposing a plurality of connecting parts of the contact rod and the inner wall of a tubular workpiece, contact positions are increased, skidding between the tool and the workpiece during screwing up of the workpiece is prevented, problems of few contact positions and easy skidding between the current screwing-up tool and the circular pipe workpiece are solved.

Description

Interior circle spanner

Technical field

The utility model belongs to the hardware ﹠ tools technical field, relates to a kind of interior circle spanner.

Background technology

At present, for pipe workpiece and other workpiece when being threaded, to this instrument of the common employing pipe wrench of tightening of pipe workpiece, but because the special shape of cylindric workpiece, pipe wrench only is the line contact of two places with contacting of pipe workpiece, and contact position is few, easily skids.

Summary of the invention

The purpose of this utility model provides a kind of interior circle spanner, and the contact position that has solved existing pipe workpiece tightening tool and workpiece is few, easily problem of slip.

The technical scheme that the utility model adopted is, circle spanner in a kind of, the support body that comprises tubular, the support body side is connected with tommy bar, the support body inwall, axially evenly be provided with some grooves along support body, the groove cross section is that two ends are semicircular circular arc strip, groove distributes along the Archimedes spiral that with the center of circle of support body is the center in the plane of support body end face, be provided with bearing in each groove, support body one end face is provided with end cap, be provided with chute with the corresponding position of bearing on the end cap, the both sides of support body are connected with an end of spring respectively, the other end of spring is connected with end cap, and an end of the interior roller of bearing is stuck on the chute, and the other end of the interior roller of bearing is connected with contact lever.

The beneficial effects of the utility model are, by a plurality of contact levers and tubular workpiece inwall joint are set, have increased contact position, skid between instrument and workpiece when having prevented from workpiece tightened.

Description of drawings

Fig. 1 is the structural representation of the utility model cylindrical spanner;

Fig. 2 is the side view of the utility model cylindrical spanner.

Among the figure, 1. support body, 2. tommy bar, 3. groove, 4. bearing, 5. end cap, 6. chute, 7. spring, 8. contact lever.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is elaborated.

The structure of a kind of interior circle spanner of the present utility model, as Fig. 1, shown in Figure 2, the support body 1 that comprises tubular, support body 1 side is connected with tommy bar 2, support body 1 inwall, axially evenly be provided with some grooves 3 along support body 1, described groove 3 cross sections are that two ends are semicircular circular arc strip, groove 3 distributes along the Archimedes spiral that with the center of circle of support body 1 is the center in the plane of support body 1 end face, be provided with bearing 4 in each groove 3, support body 1 one end faces are provided with end cap 5, be provided with chute 6 with bearing 4 corresponding positions on the end cap 5, the both sides of support body 1 are connected with an end of spring 7 respectively, the other end of spring 7 is connected with end cap 5, and an end of the interior roller of bearing 4 is stuck on the chute 6, and the other end of the interior roller of bearing 4 is connected with contact lever 8.

The operation principle of circle spanner is in of the present utility model, because interior roller one end of bearing 4 is fixed on the end cap 5, end cap 5 is put the end of groove 3 near support body 1 center of circle by spring 7 tractives so contact lever 8 draws with bearing 4.During use, rotary end cover 5, because groove 3 distributes along the Archimedes spiral that with the center of circle of support body 1 is the center in the plane of support body 1 end face, so contact lever 8 moves to the end of groove 3 away from support body 1 center of circle along groove 3 and chute 6 simultaneously with bearing 4 during rotary end cover 5.This moment, the contact lever 8 with spanner was inserted in the tubular workpiece that need reverse, unclamp end cap 5, be subjected to spring 7 tractives, end cap 5 drives bearing 4 and moves to the center of circle one end of groove 3 near support body 1, workpiece is blocked, can reverse by 2 pairs of workpiece of tommy bar, workpiece be tightened, and then it is tightened by frictional force contact lever 8; When finish once tighten action after, when opposite direction was pulled, bearing 4 was subjected to the frictional force effect with spanner, rolled to the end of groove 3 away from support body 1 center of circle, can carry out next time the action of tightening this moment.

Claims

1. circle spanner in a kind, it is characterized in that, the support body (1) that comprises tubular, support body (1) side is connected with tommy bar (2), support body (1) inwall, axially evenly be provided with some grooves (3) along support body (1), described groove (3) cross section is that two ends are semicircular circular arc strip, groove (3) distributes along the Archimedes spiral that with the center of circle of support body (1) is the center in the plane of support body (1) end face, be provided with bearing (4) in each groove (3), support body (1) one end face is provided with end cap (5), end cap (5) is gone up and the corresponding position of bearing (4) is provided with chute (6), the both sides of support body (1) are connected with an end of spring (7) respectively, the other end of spring (7) is connected with end cap (5), one end of the interior roller of bearing (4) is stuck on the chute (6), and the other end of the interior roller of bearing (4) is connected with contact lever (8).