Expansion sleeve type hub

Abstract

The utility model relates to the technical field of fan impeller hubs, and discloses an expansion sleeve type hub which comprises a hub and a main shaft, the hub comprises a shaft sleeve and a taper sleeve, an inner ring of the taper sleeve is movably sleeved on an outer ring of the shaft sleeve, the inner ring of the taper sleeve and the outer ring of the shaft sleeve are both provided with taper, and the main shaft is inserted between the inner rings of the shaft sleeve in a penetrating mode. A notch is formed in one side of the side wall of the shaft sleeve, a notch is formed in the inner wall of the other side of the side wall of the shaft sleeve, the position of the notch and the position of the notch are aligned left and right on the side wall of the shaft sleeve, six through holes penetrating left and right are evenly formed in one end of the taper sleeve, and six screw holes penetrating left and right are evenly formed in one end of the shaft sleeve. And six screw holes on the shaft sleeve are respectively aligned with the six through holes on the taper sleeve, and bolts are inserted between the corresponding through holes and screw holes in a penetrating way, the utility model has the advantage that the heating process can be omitted, and the assembly and the on-site disassembly of a user are very convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of fan impeller hubs, in particular to an expansion sleeve type hub. Background Art

[0002] A centrifugal fan wheel refers to a fan wheel that takes in air axially and discharges air radially, and uses centrifugal force (depending on the speed and outer diameter) to do work to increase the pressure of the air. Generally, when installing the cantilever centrifugal fan impeller and the main shaft, the hub shaft hole needs to be heated at high temperature to expand it for easy installation; it also needs to be heated during disassembly, otherwise it will be difficult to pull out the main shaft. The heating process is not only cumbersome, but also has certain safety hazards. For this reason, this application proposes an expansion sleeve hub. Utility Model Content

[0003] In order to solve the problems raised in the above-mentioned background technology, the utility model provides the following technical solutions: an expansion sleeve type wheel hub, comprising a wheel hub and a main shaft, the wheel hub comprising a sleeve and a tapered sleeve, the inner ring of the tapered sleeve being movably sleeved on the outer ring of the sleeve, and the inner ring of the tapered sleeve and the outer ring of the sleeve are both provided with a taper, the main shaft is inserted through and connected between the inner rings of the sleeve, a notch is provided on one side of the side wall of the sleeve, a groove is provided on the inner wall on the other side of the side wall of the sleeve, the position of the groove and the position of the notch are aligned on the left and right on the side wall of the sleeve, six through holes are evenly provided on one end of the tapered sleeve, six screw holes are evenly provided on one end of the sleeve, and the six screw holes on the sleeve are respectively aligned with the six through holes on the tapered sleeve, and bolts are inserted through and connected between the corresponding through holes and screw holes.

[0004] Furthermore, the taper of the outer ring of the sleeve is 1:15.

[0005] Furthermore, the taper of the outer ring of the shaft sleeve is the same as the taper of the inner ring of the tapered sleeve, and the inner ring wall of the tapered sleeve fits the outer ring wall of the shaft sleeve.

[0006] Furthermore, multiple bolts pass through corresponding through holes and are threadedly connected to the screw holes, and the length of the bolts is greater than the length of the sleeve.

[0007] Furthermore, the length of the tapered sleeve is smaller than the horizontal length of the inclined surface of the outer ring of the sleeve.

[0008] Furthermore, four connecting rods are evenly and fixedly installed around the bottom end of the sleeve side wall.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] By tightening the bolts to move the tapered sleeve to the right on the outer ring of the sleeve, the inner ring wall of the tapered sleeve can gradually squeeze the outer ring wall of the sleeve, making the spacing between the notches on the side wall of the sleeve smaller, so that the sleeve can be stably expanded on the main shaft. This hub can avoid the heating process, and is very convenient for both assembly and on-site disassembly by the user, so that the assembly or disassembly between the hub and the main shaft can be completed quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0012] Figure 1 It is a schematic diagram of the cross-sectional structure of the side of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the connection between the shaft sleeve and the tapered sleeve of the utility model;

[0014] In the figure: 1. Bushing; 2. Taper sleeve; 3. Main shaft; 4. Notch; 5. Slot; 6. Through hole; 7. Screw hole; 8. Bolt; 9. Connecting rod. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0016] Depend on Figure 1-2 It is given that the utility model includes a wheel hub and a main shaft 3, the wheel hub includes a sleeve 1 and a tapered sleeve 2, the inner ring of the tapered sleeve 2 is movably connected to the outer ring of the sleeve 1, and the inner ring of the tapered sleeve 2 and the outer ring of the sleeve 1 are both provided with a taper, the main shaft 3 is inserted through the inner ring of the sleeve 1, a notch 4 is provided on one side of the side wall of the sleeve 1, and a groove 5 is provided on the inner wall on the other side of the side wall of the sleeve 1, the position of the groove 5 and the position of the notch 4 are aligned on the left and right on the side wall of the sleeve 1, and the notch 4 and the groove 5 on the side wall of the sleeve 1 can make the sleeve 1 itself easier to converge, one end of the tapered sleeve 2 is evenly provided with six through holes 6 that pass through on the left and right, one end of the sleeve 1 is evenly provided with six screw holes 7 that pass through on the left and right, and the six screw holes 7 on the sleeve 1 are respectively aligned with the six through holes 6 on the tapered sleeve 2, and bolts 8 are inserted through the corresponding through holes 6 and screw holes 7.

[0017] like Figure 1As shown, the taper of the outer ring of the sleeve 1 is 1:15, so that the outer ring wall of the sleeve 1 can be in an inclined state, so that the diameter of the outer ring wall of the sleeve 1 gradually increases from left to right.

[0018] like Figure 1 and Figure 2 As shown, the taper of the outer ring of the sleeve 1 is the same as the taper of the inner ring of the tapered sleeve 2, and the inner ring wall of the tapered sleeve 2 fits with the outer ring wall of the sleeve 1, so that the inner ring wall of the tapered sleeve 2 can fit with the outer ring wall of the sleeve 1, and the diameter of the inner ring wall of the tapered sleeve 2 gradually increases from left to right. In this way, when the bolts 8 are tightened to move the tapered sleeve 2 to the right on the outer ring of the sleeve 1, the inner ring wall of the tapered sleeve 2 can gradually squeeze the outer ring wall of the sleeve 1, so that the distance between the notches 4 on the side wall of the sleeve 1 becomes smaller, so that the sleeve 1 can be stably expanded onto the main shaft 3.

[0019] like Figure 1 As shown, multiple bolts 8 pass through the corresponding through holes 6 and are threadedly connected to the screw holes 7. The length of the bolts 8 is greater than the length of the sleeve 1, so that the bolts 8 can smoothly pass through the through holes 6 on the tapered sleeve 2 and are threadedly connected to the screw holes 7 on the sleeve 1.

[0020] like Figure 1 As shown, the length of the tapered sleeve 2 is smaller than the horizontal length of the inclined surface of the outer ring of the sleeve 1, so that the tapered sleeve 2 can move backward on the outer wall of the sleeve 1, thereby converging and squeezing the sleeve 1.

[0021] like Figure 1 and Figure 2 As shown, four connecting rods 9 are evenly and fixedly installed around the bottom end of the side wall of the sleeve 1.

[0022] Working principle: Insert the main shaft 3 through the sleeve 1, then sleeve the tapered sleeve 2 on the outer wall of the sleeve 1, and align the multiple screw holes 7 on the tapered sleeve 2 with the multiple through holes 6 on the sleeve 1, and then insert the bolt 8 between the corresponding through holes 6 and screw holes 7, and finally tighten the bolt 8. When tightening the bolt 8, the tapered sleeve 2 will squeeze the sleeve 1, so that the spacing between the notches 4 on the side wall of the sleeve 1 becomes smaller, so that the sleeve 1 can be stably expanded on the main shaft 3.

[0023] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0024] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An expansion hub, comprising a hub and a main shaft (3), characterized in that: The wheel hub comprises a shaft sleeve (1) and a tapered sleeve (2), the inner ring of the tapered sleeve (2) is movably sleeved on the outer ring of the shaft sleeve (1), and the inner ring of the tapered sleeve (2) and the outer ring of the shaft sleeve (1) are both provided with a taper, the main shaft (3) is inserted through the inner ring of the shaft sleeve (1), a notch (4) is provided on one side of the side wall of the shaft sleeve (1), a notch (5) is provided on the inner wall of the other side of the side wall of the shaft sleeve (1), the position of the notch (5) and the position of the notch (4) are aligned on the side wall of the shaft sleeve (1), six through holes (6) are evenly provided on one end of the tapered sleeve (2), six screw holes (7) are evenly provided on one end of the shaft sleeve (1), and the six screw holes (7) on the shaft sleeve (1) are respectively aligned with the six through holes (6) on the tapered sleeve (2), and bolts (8) are inserted through the corresponding through holes (6) and screw holes (7).

2. The expansion hub according to claim 1, characterized in that: The taper of the outer ring of the shaft sleeve (1) is 1:

15.

3. The expansion hub according to claim 2, characterized in that: The taper of the outer ring of the shaft sleeve (1) is the same as the taper of the inner ring of the tapered sleeve (2), and the inner ring wall of the tapered sleeve (2) fits the outer ring wall of the shaft sleeve (1).

4. The expansion hub according to claim 1, characterized in that: The plurality of bolts (8) all pass through the corresponding through holes (6) and are threadedly connected to the screw holes (7); the length of the bolts (8) is greater than the length of the shaft sleeve (1).

5. The expansion hub according to claim 1, characterized in that: The length of the tapered sleeve (2) is smaller than the horizontal length of the outer ring inclined surface of the shaft sleeve (1).

6. The expansion hub according to claim 1, characterized in that: Four connecting rods (9) are evenly and fixedly installed around the bottom end of the side wall of the shaft sleeve (1).

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