CN219152140U - Expansion sleeve - Google Patents

Abstract

The utility model discloses an expansion sleeve, which comprises an expansion sleeve body, wherein an inner hole is further formed in the middle of the expansion sleeve body; the expansion sleeve body further comprises an outer ring, a first bulge is arranged at one end of the outer ring, and a second bulge is arranged at the other end of the outer ring; a first deformation area is arranged at the joint of the first bulge and the outer ring; when the inner hole is sleeved on the power rod, the workpiece is sleeved on the outer ring, and the outer ring is promoted to radially expand by the power rod, so that the workpiece is fixed by the expansion sleeve body; when the expansion sleeve body is subjected to axial pressure, the deformation of the first deformation area is used for buffering the damage of the axial pressure to the expansion sleeve body, so that the problem that the root of the expansion sleeve body is easy to break when being pressed is solved; the outer ring and the second bulge are also provided with a second deformation zone, and the second deformation zone and the first deformation zone are arranged on the diagonal line of the outer ring. So that the two ends of the expansion sleeve body are uniformly stressed, and the problem that the root of the expansion sleeve body is broken is further avoided.

Description

Expansion sleeve

Technical Field

The utility model relates to the technical field of tensioning clamps, in particular to a tensioning sleeve.

Background

As the machining industry, various disc parts are frequently encountered, other surfaces to be machined need to be positioned and machined by taking the machined inner hole as a reference, and in order to improve the machining efficiency, the clamping times are preferably reduced, and some parts do not allow the end face to be pressed, so that the inner hole is required to be tightly expanded, and therefore, an expansion sleeve and expansion core structure which is positioned and tightly expanded by the inner hole is often designed and manufactured.

The applicant found by search, for example: the patent number is: CN109954898A or chinese patent No. CN 113458440B, it can be found by the above prior art that when the existing expansion sleeve is axially extruded, the root of the expansion sleeve is very easy to crack or deform, so that the tension of the expansion sleeve is insufficient in later use.

Disclosure of Invention

The utility model aims to provide an expansion sleeve for solving the problems in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the expansion sleeve comprises an expansion sleeve body, wherein an inner hole is further formed in the middle of the expansion sleeve body; the expansion sleeve body further comprises an outer ring, a first bulge is arranged at one end of the outer ring, and a first deformation area is arranged at the joint of the first bulge and the outer ring.

As a preferable technical scheme of the utility model: the outer ring is far away from the other surface of the first bulge and is also provided with a second bulge.

As a preferable technical scheme of the utility model: and a second deformation area is further arranged at the joint of the outer ring and the second bulge.

As a preferable technical scheme of the utility model: the first deformation area and the second deformation area are arranged on the diagonal line of the cross section of the outer ring.

As a preferable technical scheme of the utility model: the aperture values of the first deformation area and the second deformation area are 1.5-4 mm.

As a preferable technical scheme of the utility model: the inner bore includes a power bore and a tapered bore.

As a preferable technical scheme of the utility model: the conical hole expands from one end facing the power hole to one end far away from the power hole, and an inner conical surface a is formed; wherein, the value range of a is 16-20 degrees.

As a preferable technical scheme of the utility model: the outer diameter of the outer ring is larger than the outer diameter of the first protrusion.

As a preferable technical scheme of the utility model: the expansion sleeve body is linked with a power rod.

As a preferable technical scheme of the utility model: the inside of power hole is equipped with the annular, just the annular with the impeller block linkage that is equipped with on the power pole.

By adopting the technical scheme, the utility model has the beneficial effects that: when the sleeve body that rises receives axial pressure, the deformation of first deformation district is in order to cushion the damage that axial pressure led to the fact to the sleeve body that rises, and then easily appear cracked problem when having solved the root that rises the sleeve body and pressed, have based on this, this life that rises the sleeve body can prolong to the phenomenon that current equipment leads to the tensioning force not enough because of its damage when using has been solved.

Drawings

FIG. 1 is a schematic cross-sectional view of an expansion joint body according to the present utility model;

FIG. 2 is a schematic cross-sectional view of a power rod according to the present utility model;

fig. 3 is a schematic view of the clamping of the present utility model during tooth making.

In the figure: 1. an upper ram assembly; 2. a power lever; 3. a swelling sleeve body; 30. a power hole; 31. a tapered bore; 32. a second deformation region; 33. an outer ring; 34. a first deformation zone; 35. a first protrusion; 36. a second protrusion; 37. an inner bore; 38. a ring groove; 4. a pushing block; 5. a pressing plate; 6. and a lower support assembly.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

Referring to fig. 1-3, an embodiment of the present utility model is provided: the expansion sleeve comprises an expansion sleeve body 3, wherein an inner hole 37 is further formed in the middle of the expansion sleeve body 3; the expansion sleeve body 3 further comprises an outer ring 33, a first protrusion 35 is arranged at one end of the outer ring 33, and a first deformation area 34 is arranged at the joint of the first protrusion 35 and the outer ring 33.

When the sleeve body 3 is subjected to axial pressure, the deformation of the first deformation zone 34 is used for buffering the damage to the sleeve body 3 caused by the axial pressure, so that the problem that the root of the sleeve body 3 is easy to break when being pressed is solved, the service life of the sleeve body 3 is prolonged based on the problem, and the phenomenon that the tensioning force is insufficient due to the damage of the existing equipment when the existing equipment is used is solved.

In addition, in the expansion sleeve body 3, the product clamping with different apertures can be met by changing the size of the outer ring 33 during design.

Further, since the second protrusion 36 is further disposed on the other surface of the outer ring 33 away from the first protrusion 35, due to the arrangement of the two protrusions, the outer ring 33 is conveniently guided into the workpiece, and meanwhile, the outer ring 33 can be prevented from contacting with equipment other than the workpiece by using the two protrusions, so that the outer ring 33 has a relatively good working environment, damage to the equipment other than the workpiece is avoided, and in addition, the axial pressure is transmitted to the outer ring 33 by using the two protrusions, because the stress of the outer ring 33 is more uniform, so that the outer ring 33 is promoted to reliably radially expand.

In order to improve the anti-cracking capability of the two ends of the outer ring 33, the connection part between the outer ring 33 and the second protrusion 36 is further provided with a second deformation region 32, and due to the arrangement of the first deformation region 34 and the second deformation region 32, the two ends of the outer ring 33 can relieve the axial pressure, so that the problem that the root of the outer ring 33 is squeezed to crack is avoided.

In addition, the outer diameter of the outer ring 33 is larger than the outer diameter of the first protrusion 35, wherein the diameter of the first protrusion 35 is the same as the diameter of the second protrusion 36.

Further, since the first deformation region 34 and the second deformation region 32 are disposed on a diagonal line of the cross section of the outer ring 33, the stress of the outer ring 33 is more balanced, and the service life of the outer ring 33 is further prolonged.

Specifically, the aperture values of the first deformation region 34 and the second deformation region 32 are 1.5-4 mm.

Based on the above, the inner bore 37 includes the power bore 30 and the tapered bore 31. Therefore, the insertion of the power rod 2 is facilitated, and the expansion sleeve body 3 is further facilitated to be linked with the provided power rod 2. Meanwhile, an annular groove 38 is arranged in the power hole 30, and the annular groove 38 is linked with a pushing block 4 arranged on the power rod 2. Therefore, when the power rod 2 passes through the inner hole 37, the inner hole 37 is clamped at the neck of the power rod 2, and the inner hole 37 can move up and down and in the circumferential direction at the neck of the power rod 2, so that the expansion sleeve body 3 can move on the power rod 2, and the expansion sleeve body 3 and the power rod 2 are prevented from interfering with each other during use.

Since the tapered hole 31 is expanded from an end facing the power hole 30 to an end remote from the power hole 30, and forms an inner tapered surface a; wherein, the value range of a is 16-20 degrees. Therefore, the inner conical surface a can ensure that the tension sleeve body 3 still keeps good centering effect when being pulled down along with the power rod 2.

In addition, the same company can normalize the angle of the inner conical surface a into one value or a plurality of fixed values, can carry out generalized and standardized design when a new product is developed or a production assembly line, is beneficial to controlling the input cost, shortening the manufacturing period of the clamp and improving the work output by quick replacement.

The starting equipment, lathe hydraulic power transmission gives power pole 2, and cover body 1 rises under the clamp plate 5 and the effect of pushing block 4 on power pole 2 that rise, makes the cover body that rises 3 downward movement, under the accurate cooperation of conical hole 31 and lower support subassembly 6 outer conical surface, prevents to rise cover body 3 and continues to move down, and at this moment, outer lane 33 radial expansion has realized by the product clamp of processing promptly.

The center of the workpiece is not deviated under the precise matching of the conical hole 31 and the outer conical surface of the lower bracket assembly 6. The machine tool program continues to run, and the upper pressing head assembly 1 is pressed downwards on the upper end face of the processed product.

And returning the machine tool after the processed product is processed. The upper pressure head assembly 1 moves upwards to loosen, and the hydraulic cylinder of the machine tool moves upwards (or outwards), so that the power rod 2 supports the lower end face of the inner hole 37 to move outwards together, and the product loosening action is completed.

The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model, and yet fall within the scope of the utility model.

Claims (10)

1. The utility model provides a cover that rises, includes cover body (3) that rises, its characterized in that: an inner hole (37) is further formed in the middle of the expansion sleeve body (3);

the expansion sleeve body (3) further comprises an outer ring (33), a first bulge (35) is arranged at one end of the outer ring (33), and a first deformation area (34) is arranged at the joint of the first bulge (35) and the outer ring (33).

2. An expansion shell according to claim 1, wherein: the other surface of the outer ring (33) far away from the first bulge (35) is also provided with a second bulge (36).

3. An expansion shell according to claim 2, wherein: the joint of the outer ring (33) and the second bulge (36) is also provided with a second deformation zone (32).

4. A tension sleeve as recited in claim 3, wherein: the first deformation region (34) and the second deformation region (32) are arranged on the diagonal line of the cross section of the outer ring (33).

5. An expansion joint according to claim 4, wherein: the aperture values of the first deformation region (34) and the second deformation region (32) are in a range of 1.5-4 mm.

6. An expansion shell according to any one of claims 1-5, wherein: the inner bore (37) includes a motive bore (30) and a tapered bore (31).

7. An expansion joint according to claim 6, wherein: the conical hole (31) expands from one end facing the power hole (30) to one end far away from the power hole (30) and forms an inner conical surface a; wherein, the value range of a is 16-20 degrees.

8. An expansion joint according to claim 7, wherein: the outer ring (33) has an outer diameter greater than the outer diameter of the first protrusion (35).

9. An expansion joint according to claim 7, wherein: the expansion sleeve body (3) is linked with the power rod (2) which is arranged.

10. An expansion shell according to claim 9, wherein: an annular groove (38) is formed in the power hole (30), and the annular groove (38) is linked with a pushing block (4) arranged on the power rod (2).

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