A smooth long tube inner cavity fixing device based on double-layer expansion sleeve

Abstract

The present invention is applicable to the field of mechanical equipment installation, and specifically is a smooth long tube inner cavity fixing device based on a double-layer expansion sleeve, comprising: a double-layer expansion sleeve body inserted into the smooth long tube, the double-layer expansion sleeve body comprising an outer ring, a middle ring and an inner ring; an outer tapered plate surface A is arranged on the outer peripheral walls of the outer ring, and an inner tapered plate surface having the same taper as the outer tapered plate surface A is arranged inside; the outer ring tapered surface on the middle ring has the same taper as the inner ring tapered surface, and is maintained the same as the outer tapered plate surface A; an outer tapered plate surface B is arranged on the inner ring, and the taper of the outer tapered plate surface B is maintained the same as the inner ring tapered surface; the double-layer expansion sleeve body is inserted into the smooth long tube, and the inner ring of the double-layer expansion sleeve body maintains the same taper as the outer ring, so that the workpiece inside the expansion sleeve can be radially fixed, and at the same time, the expansion force of the outer ring is used to radially fix the workpiece with the outer inner wall without flange or key connection reserved.

Description

Technical Field

[0001] The invention relates to the field of mechanical equipment installation, and in particular to a smooth long tube inner cavity fixing device based on a double-layer expansion sleeve. Background Art

[0002] Expanding sleeves are common mechanical components used to connect two shafts (driving and driven) in different mechanisms, enabling them to rotate together and transmit torque. In high-speed, heavy-load power transmission, some couplings also provide cushioning, vibration reduction, and improved dynamic performance of the shaft system.

[0003] The expansion sleeve consists of two halves, one connected to the driving shaft and the other to the driven shaft. Generally, power machines are connected to the working machine with the help of couplings, which are the most commonly used connection components in the shaft transmission of mechanical products.

[0004] Existing expansion sleeves are all single-layered, and national standards exist. However, all existing types and styles feature an inner ring, which can only secure shafts connected to the inner ring through expansion force; the outer ring cannot be used for expansion and securing. Therefore, single-layered expansion sleeves cannot be used as mounting components for smooth, long pipes without a flange or keyed connection. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for fixing the inner cavity of a smooth long tube based on a double-layer expansion sleeve to solve the problems raised in the above background technology. To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A device for fixing the inner cavity of a smooth long tube based on a double-layer expansion sleeve comprises: a double-layer expansion sleeve body inserted into the interior of the smooth long tube, the double-layer expansion sleeve body comprising an outer ring, a middle ring inserted into the interior of the outer ring, and an inner ring inserted into the interior of the middle ring; wherein,

[0007] The outer ring is provided with a plurality of elastic outer tapered plate surfaces A on the four outer walls, and an elastic inner tapered plate surface with the same taper as the outer tapered plate surface A is provided inside, and the outer tapered plate surface A has the same taper as the smooth long tube; the elastic outer ring tapered surface on the middle ring has the same taper as the inner ring tapered surface, and remains the same as the outer tapered plate surface A; the inner ring is provided with a plurality of elastic outer tapered plate surfaces B, and the outer tapered plate surface B maintains the same taper as the inner ring tapered surface.

[0008] The double-layer expansion sleeve body is inserted into the smooth long tube. By maintaining the same taper between the inner and outer rings of the double-layer expansion sleeve body, the workpiece inside the expansion sleeve can be radially fixed while the expansion force of the outer ring is used to radially fix the workpiece with the outer inner wall without flange or key connection.

[0009] This solves the problem that existing expansion sleeves are all single-layered. However, all existing types and styles have inner rings, which can only secure shaft workpieces connected to the inner ring through expansion force, and the outer ring cannot be used for expansion and fixation. Therefore, single-layer expansion sleeves cannot be used as mounting parts for smooth long pipes without reserved flanges or keyed connection interfaces.

[0010] In the smooth long tube inner cavity fixing device based on the double-layer expansion sleeve of the present invention, a plurality of expansion bolts are inserted into the outer ring, and the bolts extend outward and are inserted into the inner ring. The expansion bolts can ensure a certain coaxiality between the inner workpiece and the overall inner wall, thereby increasing the installation accuracy of components such as sensors and actuators that are sensitive to coaxiality;

[0011] A plurality of gaps distributed in an annular shape and at equal intervals are provided on the inner tapered plate surface.

[0012] A further solution is that the outer ring is provided with a plurality of through holes for the interpenetrating bolts, and the inner ring is provided with a plurality of threaded holes corresponding to the through holes, and the bolts pass through the through holes and the threaded holes.

[0013] In the smooth long tube inner cavity fixing device based on the double-layer expansion sleeve of the present invention: a through hole is formed inside the inner ring tapered surface of the middle ring for clamping the inner workpiece.

[0014] A further solution is that a plurality of ventilation holes are arranged in a circular array on the radial ring wall of the middle ring to allow gas or liquid to flow through the inside of the smooth long tube.

[0015] In the smooth long tube inner cavity fixing device based on the double-layer expansion sleeve of the present invention: the plurality of outer tapered plate surfaces B are distributed in a ring array, and the interiors thereof are circled to form cylindrical through holes.

[0016] A further solution: the inner wall of the outer tapered plate surface B is an inner cylindrical surface.

[0017] A further solution is that a plurality of the outer tapered plate surfaces B are provided with a plurality of gaps therebetween.

[0018] Compared with the prior art, the present invention is a smooth long tube inner cavity fixing device based on a double-layer expansion sleeve, comprising: a double-layer expansion sleeve body inserted into the smooth long tube, the double-layer expansion sleeve body comprising an outer ring, a middle ring inserted into the outer ring, and an inner ring inserted into the middle ring; wherein, a plurality of elastic outer tapered plate surfaces A are provided on the outer four walls of the outer ring, and an elastic inner tapered plate surface having the same taper as the outer tapered plate surface A is provided inside, and the outer tapered plate surface A has the same taper as the smooth long tube The elastic outer ring tapered surface on the middle ring has the same taper as the inner ring tapered surface, and maintains the same taper as the outer tapered plate surface A; the inner ring is provided with multiple elastic outer tapered plate surfaces B, and the taper of the outer tapered plate surface B is maintained the same as that of the inner ring tapered surface; the double-layer expansion sleeve body is inserted into the smooth long tube, and the inner ring and the outer ring of the double-layer expansion sleeve body maintain the same taper, so that the inner workpiece of the expansion sleeve can be radially fixed while the expansion force of the outer ring is used to radially fix it with the outer inner wall without flange or key connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The figure is a schematic structural diagram of the smooth long tube inner cavity fixing device based on the double-layer expansion sleeve of the present invention.

[0020] Figure 2 for Figure 1 Schematic diagram of the structure of the middle and outer rings.

[0021] Figure 3 for Figure 1 Schematic diagram of the Central Ring's structure.

[0022] Figure 4 for Figure 1 Schematic diagram of the structure of the middle inner ring.

[0023] Figure 5 The figure is a schematic diagram of the assembly of the smooth long tube inner cavity fixing device based on the double-layer expansion sleeve of the present invention.

[0024] In the picture:

[0025] 1-bolt; 2-outer ring; 3-middle ring; 4-inner ring; 5-double-layer expansion sleeve body; 6-smooth long tube; 7-workpiece;

[0026] 21-outer tapered plate surface A; 22-through hole; 23-inner tapered plate surface; 24-gap;

[0027] 31-outer ring tapered surface; 32-ventilation liquid hole; 33-inner ring tapered surface;

[0028] 41 - outer tapered plate surface B; 42 - gap; 43 - threaded hole; 44 - inner cylindrical surface. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments. In the description of the present invention, unless otherwise specified, "a plurality of" means two or more.

[0030] Existing expansion sleeve structures are all single-layer expansion sleeves, but the existing varieties and types are all inner ring expansion sleeves, which can only fix the shaft workpiece connected to the inner ring through expansion force, and the outer ring cannot be used for expansion and fixation. Therefore, the single-layer expansion sleeve cannot be used as a mounting member for smooth long tubes without reserved flanges or keyed connection interfaces. The purpose of the present invention is to provide a device for fixing the inner cavity of smooth long tubes based on a double-layer expansion sleeve to solve the problems raised in the above background technology. To achieve the above purpose, the present invention provides the following technical solutions:

[0031] In the embodiment of the present invention, Figure 1-5 As shown, a smooth long tube inner cavity fixing device based on a double-layer expansion sleeve includes:

[0032] The double-layer expansion sleeve body 5 is inserted into the smooth long tube 6, and the double-layer expansion sleeve body 5 includes an outer ring 2, a middle ring 3 inserted into the outer ring 2, and an inner ring 4 inserted into the middle ring 3; wherein,

[0033] The outer ring 2 is provided with a plurality of elastic outer tapered plates A21 on the four outer walls thereof, and an elastic inner tapered plate 23 having the same taper as the outer tapered plate A21 is provided inside the outer ring 2. The outer tapered plate A21 has the same taper as the smooth long tube 6.

[0034] The elastic outer ring tapered surface 31 and the inner ring tapered surface 33 on the middle ring 3 have the same taper, and are kept the same as the outer tapered plate surface A21;

[0035] The inner ring 4 is provided with a plurality of elastic outer tapered plate surfaces B41 , and the taper of the outer tapered plate surfaces B41 is the same as that of the inner ring tapered surface 33 .

[0036] In the embodiment of the present invention, the double-layer expansion sleeve body 5 is inserted into the smooth long tube 6. By maintaining the same taper between the inner ring 4 and the outer ring 2 of the double-layer expansion sleeve body 5, the workpiece 7 inside the expansion sleeve can be radially fixed while the expansion force of the outer ring 2 is used to radially fix the workpiece 7 with the outer inner wall without a flange or key connection.

[0037] In the embodiment of the present invention, Figure 2 and Figure 3As shown, a plurality of expansion bolts 1 are inserted into the outer ring 2, and the bolts 1 extend outward and are inserted into the inner ring 4. The expansion bolts 1 can ensure a certain coaxiality between the inner workpiece 7 and the overall inner wall, and increase the installation accuracy of components such as sensors and actuators that are sensitive to coaxiality; a plurality of gaps 24 with equal spacing in a ring shape are provided on the inner tapered plate surface 23.

[0038] Specifically, the outer ring 2 is provided with a plurality of through holes 22 for the inserted bolts 1 , and the inner ring 4 is provided with a plurality of threaded holes 43 corresponding to the through holes 22 , and the bolts 1 pass through the through holes 22 and the threaded holes 43 .

[0039] A through hole is formed inside the inner tapered surface 33 of the middle ring 3 for clamping the inner workpiece 7; specifically, a plurality of ventilation holes 32 distributed in a circular array are arranged on the radial ring wall of the middle ring 3 for allowing gas or liquid to flow through the smooth long tube 6.

[0040] In the embodiment of the present invention, Figure 4 As shown, the plurality of outer tapered plate surfaces B41 are distributed in a circular array, and cylindrical through holes are formed inside the circle; specifically, the inner wall of the outer tapered plate surface B41 is an inner cylindrical surface 44; and a plurality of gaps 42 are formed between the plurality of outer tapered plate surfaces B41.

[0041] The present invention is based on a smooth long tube inner cavity fixing device of a double-layer expansion sleeve, comprising: a double-layer expansion sleeve body 5 inserted into the smooth long tube 6, the double-layer expansion sleeve body 5 including an outer ring 2, a middle ring 3 inserted into the outer ring 2, and an inner ring 4 inserted into the middle ring 3; wherein, the outer four walls of the outer ring 2 are provided with a plurality of elastic outer tapered plate surfaces A21, and the inner side is provided with an elastic inner tapered plate surface 23 having the same taper as the outer tapered plate surface A21, and the outer tapered plate surface A21 has the same taper as the smooth long tube 6; the middle ring 3 has the same taper as the elastic outer ring tapered surface 31 and the inner ring tapered surface 33, and maintains the same taper as the outer tapered plate surface A21; the inner ring 4 is provided with multiple elastic outer tapered plate surfaces B41, and the taper of the outer tapered plate surface B41 and the inner ring tapered surface 33 are maintained at the same time; the double-layer expansion sleeve body 5 is inserted into the smooth long tube 6, and the inner ring 4 of the double-layer expansion sleeve body 5 maintains the same taper as the outer ring 2, so that the workpiece 7 inside the expansion sleeve can be radially fixed while the expansion force of the outer ring 2 is used to radially fix it to the outer inner wall without flange or key connection.

[0042] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0043] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A smooth long tube inner cavity fixing device based on a double-layer expansion sleeve, characterized in that: include: A double-layer expansion sleeve body inserted into the smooth long tube, the double-layer expansion sleeve body comprising an outer ring, a middle ring inserted into the outer ring, and an inner ring inserted into the middle ring; wherein, The outer ring is provided with a plurality of elastic outer tapered plates A on the outer peripheral walls thereof, and an elastic inner tapered plate having the same taper as the outer tapered plate A is provided inside the outer ring, and the outer tapered plate A has the same taper as the smooth long tube; The elastic outer ring tapered surface on the middle ring has the same taper as the inner ring tapered surface and is kept the same as the outer tapered plate surface A; The inner ring is provided with a plurality of elastic outer tapered plate surfaces B, and the taper of the outer tapered plate surfaces B is the same as that of the inner ring tapered surface. The outer ring is interspersed with a plurality of bolts for expansion, and the bolts extend outward and are interspersed with the inner ring; A plurality of gaps distributed in an annular shape and at equal intervals are formed on the inner tapered plate surface, and a through hole is formed inside the inner tapered surface of the middle ring for clamping the inner workpiece.

2. A smooth long tube inner cavity fixing device based on a double-layer expansion sleeve according to claim 1, characterized in that: The outer ring is provided with a plurality of through holes for interpenetrating bolts, and the inner ring is provided with a plurality of threaded holes corresponding to the through holes, and the bolts penetrate through the through holes and the threaded holes.

3. A smooth long tube inner cavity fixing device based on a double-layer expansion sleeve according to claim 1, characterized in that: A plurality of ventilation liquid holes are arranged in a circular array on the radial ring wall of the middle ring.

4. A smooth long tube inner cavity fixing device based on a double-layer expansion sleeve according to any one of claims 1-3, characterized in that: The plurality of outer tapered plate surfaces B are distributed in a ring array, and the interiors thereof are circled to form cylindrical through holes.

5. A smooth long tube inner cavity fixing device based on a double-layer expansion sleeve according to claim 4, characterized in that: The inner wall of the outer tapered plate surface B is an inner cylindrical surface.

6. A smooth long tube inner cavity fixing device based on a double-layer expansion sleeve according to claim 4, characterized in that: A plurality of gaps are formed between the plurality of outer tapered plate surfaces B.

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