Protecting device for hollow shaft of speed reducer

Abstract

The utility model discloses a speed reducer hollow shaft protection device which is arranged between a main shaft of operation equipment and a hollow shaft of a speed reducer, the outer side wall of the hollow shaft is provided with a speed reducer hollow shaft locking seam extending in the axis direction, and the peripheral side of the hollow shaft is sleeved with a locking device. A tensioning sleeve for the main shaft to be inserted is sleeved with the hollow shaft, the shape of the outer circumferential surface of the tensioning sleeve is matched with the shape of the inner circumferential surface of the hollow shaft, and a sleeve locking seam is formed in the pipe wall of the tensioning sleeve in the axis direction; the hardness of the tensioning sleeve is larger than that of the main shaft and the hollow shaft. According to the utility model, the damage of the hollow shaft in use is reduced, the hollow shaft and a main shaft of operation equipment are protected, the hollow shaft is convenient to disassemble, and the continuous use of the hollow shaft and the main shaft of the equipment is facilitated.

Description

Technical Field

[0001] The utility model relates to a transmission shaft connection protection device, in particular to a reducer hollow shaft protection device. Background Art

[0002] The output shaft of some reducers is a hollow shaft, and the reducer transmits power through the hollow shaft and the input spindle of the roller press, crusher and other operating equipment. At present, there are many ways to connect the hollow shaft with the spindle, including setting a locking slot axially on the hollow shaft, the spindle head of the operating equipment extends into the hollow shaft, and a locking device is set on the outside of the hollow shaft to press the hollow shaft inward with the cooperation of the locking slot, so that the inner surface of the hollow shaft and the outer surface of the spindle are tightly combined and locked to realize the power transmission. However, this connection method will produce irregular obstructions and impacts on the main shaft when the operating equipment is working. These obstructions and impacts will cause relative sliding between the main shaft and the hollow shaft, causing wear and burrs on the contact surfaces of the main shaft and the hollow shaft, causing damage to the hollow shaft. After the equipment has been running for a long time, these burrs or wear will cause more wear and burrs on the hollow shaft and the main shaft. After a long time, these wear and burrs will be embedded and glued together, so that the hollow shaft will not be reset during disassembly, resulting in the inability to disassemble the main shaft, reducing the efficiency of equipment use. If the main shaft and the hollow shaft are forcibly disassembled, it is very easy to damage the hollow shaft, affecting its use. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a hollow shaft protection device for a reducer which can reduce the damage of the hollow shaft and is convenient for disassembly of the main shaft and the hollow shaft.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a hollow shaft protection device for a reducer is arranged between the main shaft of the operating equipment and the hollow shaft of the reducer, a hollow shaft locking seam of the reducer extending along the axial direction is arranged on the outer side wall of the hollow shaft, a locking device is mounted on the outer peripheral side of the hollow shaft, a tensioning sleeve for inserting the main shaft is mounted inside the hollow shaft, the shape of the outer peripheral surface of the tensioning sleeve is matched with the shape of the inner peripheral surface of the hollow shaft, and a sleeve locking seam is arranged on the tube wall of the tensioning sleeve along the axial direction.

[0005] As a preferred technical solution, the sleeve locking seam is a single seam that runs through the tube wall of the expansion sleeve, and the width of the sleeve locking seam is 2-4 mm.

[0006] As a preferred technical solution, the tension sleeve is a stepped tube with a hardness greater than that of the main shaft and the hollow shaft.

[0007] As a preferred technical solution, the locking device is a locking sleeve mounted on the outer peripheral side of the hollow shaft, a gap is provided on the locking sleeve, the middle part of the outer peripheral surface of the locking sleeve is raised, and there is a smooth inclined surface between the middle part and the two side edges, the hollow shaft is located on both sides of the locking sleeve and locking disks are respectively mounted thereon, and adjacent sides of the bottom of the two locking disks are respectively provided with a clamping inclined surface corresponding to the smooth inclined surface, and a locking bolt is connected between the two locking disks.

[0008] As a preferred technical solution, the reducer hollow shaft has two locking slits, and a protective hole connected to the reducer hollow shaft locking slit is provided on the hollow shaft at the inner end of the reducer hollow shaft locking slit, and the diameter of the protective hole is larger than the width of the reducer hollow shaft locking slit.

[0009] Due to the adoption of the above technical solution, the hollow shaft protection device of the reducer is arranged between the main shaft of the operating equipment and the hollow shaft of the reducer, a locking seam of the hollow shaft of the reducer extending along the axial direction is arranged on the outer side wall of the hollow shaft, a locking device is mounted on the outer peripheral side of the hollow shaft, a tensioning sleeve for inserting the main shaft is mounted inside the hollow shaft, the shape of the outer peripheral surface of the tensioning sleeve is matched with the shape of the inner peripheral surface of the hollow shaft, and a sleeve locking seam is arranged on the tube wall of the tensioning sleeve along the axial direction. In this way, when in use, the tensioning sleeve is sleeved in the hollow shaft, and the main shaft of the operating equipment is sleeved in the tensioning sleeve. Since the hollow shaft is provided with a reducer hollow shaft locking seam and the tensioning sleeve is provided with a sleeve locking seam, when the locking device presses the hollow shaft inward, the hollow shaft presses the tensioning sleeve inward to hold the main shaft, so that the inner surface of the hollow shaft and the outer surface of the tensioning sleeve are tightly combined and locked, and the inner surface of the tensioning sleeve and the outer surface of the main shaft are tightly combined and locked. In this way, the hollow shaft, the tensioning sleeve and the main shaft are tightly connected together. During operation, irregular obstacles and impacts on the main shaft will first be transmitted to the tensioning sleeve and borne by the tensioning sleeve, and then transmitted to the hollow shaft by the tensioning sleeve. The relative sliding caused by obstruction and impact that the original main shaft and hollow shaft suffered is borne jointly by the hollow shaft, the tensioning sleeve and the main shaft. Therefore, the sliding displacement of the hollow shaft relative to the tensioning sleeve is greatly reduced, so that the damage and burrs thereon are also greatly reduced, thereby protecting the hollow shaft and the main shaft of the operating equipment. At the same time, the bonding degree between the hollow shaft and the equipment operating main shaft and the tensioning sleeve is also reduced, which is convenient for disassembly, reducing the damage to the hollow shaft and the equipment main shaft, so that the continued use of the hollow shaft and the equipment main shaft is not affected; similarly, the bonding degree between the main shaft and the equipment main shaft and the tensioning sleeve is also reduced, the damage between them is also reduced, and disassembly is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0011] Figure 1It is a structural schematic diagram of the utility model;

[0012] Figure 2 yes Figure 1 AA section view;

[0013] Figure 3 This is the front view of the expansion sleeve of the utility model;

[0014] Figure 4 It is a schematic diagram of the locking seam of the upper sleeve of the expansion sleeve of the utility model;

[0015] Figure 5 It is a schematic diagram of an embodiment of the present utility model.

[0016] In the figure: 1- reducer; 2- hollow shaft; 3- main shaft; 4- locking slit of reducer hollow shaft; 5- locking slit of casing; 6- locking sleeve; 7- gap; 8- locking plate; 9- locking bolt; 10- clamp; 11- protection hole; 12- tensioning casing. DETAILED DESCRIPTION

[0017] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0018] like Figure 1 and Figure 2As shown, the reducer hollow shaft protection device is arranged between the main shaft 3 of the operating equipment and the hollow shaft 2 of the reducer 1, and a reducer hollow shaft locking seam 4 extending along the axial direction is arranged on the outer side wall of the hollow shaft 2, and a locking device is sleeved on the outer peripheral side of the hollow shaft 2, and a tensioning sleeve 12 for inserting the main shaft 3 is sleeved in the hollow shaft 2, and the shape of the outer peripheral surface of the tensioning sleeve 12 is matched with the shape of the inner peripheral surface of the hollow shaft 2, so as to facilitate the tight fit between the tensioning sleeve 12 when the tensioning sleeve 12 is inserted into the hollow shaft 2 for sleeve installation, and a sleeve locking seam 5 is arranged on the tube wall of the tensioning sleeve 12 along the axial direction. During connection, the tensioning sleeve 12 is inserted into the hollow shaft 2, and the main shaft 3 of the operating equipment is inserted into the tensioning sleeve 12. The hollow shaft 2 is pressed inwardly by the locking device, and the hollow shaft 2 presses the tensioning sleeve 12 inwardly. With the cooperation of the hollow shaft locking seam 4 of the reducer on the hollow shaft 2 and the sleeve locking seam 5 on the tensioning sleeve 12, the hollow shaft 2 and the tensioning sleeve 12 shrink inwardly to hold the main shaft 3 to achieve connection. The hardness of the tension sleeve 12 is greater than that of the main shaft 3 and the hollow shaft 2, and the tension sleeve 12 is preferably a stepped tube with a hardness greater than that of the main shaft 3 and the hollow shaft 2, because the relative slip between the adjacent hollow shaft 2, the tension sleeve 12, and the main shaft 3 is much smaller than the relative slip between the hollow shaft 2 and the main shaft 3, so that the burrs and the like generated by the relative slip between the hollow shaft 2, the tension sleeve 12, and the main shaft 3 mostly appear on the hollow shaft 2 and the main shaft 3, while the burrs on the tension sleeve 12 are less or basically not present, which also reduces the secondary damage caused by the burrs and the like to the hollow shaft 2 and the main shaft 3. At present, the hardness of the hollow shaft 2 and the main shaft 3 is mostly between HB250-350, so the hardness of the tension sleeve 12 can be preferably HRC40. The use of a stepped tube for the tension sleeve 12 facilitates the matching and positioning with the inner cavity of the hollow shaft 2, and also facilitates the constraint positioning of the main shaft 3 when inserted into the sleeve.

[0019] like Figure 3 and Figure 4 As shown, the sleeve locking slit 5 is a single piece that penetrates the tube wall of the expansion sleeve 12, and the width of the sleeve locking slit 5 is 2-4 mm. The sleeve locking slit 5 can become smaller when the expansion sleeve 12 is compressed by the hollow shaft 2, so that the inner diameter of the expansion sleeve 12 becomes smaller and tightly embraces the main shaft 3 to achieve a tight connection between the two and reduce relative slippage. Of course, the sleeve locking slit 5 can also be two or more and be set at the end where the main shaft 3 is inserted.

[0020] like Figure 1 and Figure 2As shown, the locking device is a locking sleeve 6 which is sleeved on the outer peripheral side of the hollow shaft 2. The locking sleeve 6 is provided with a gap 7. The middle part of the outer peripheral surface of the locking sleeve 6 is convex, and there are smooth inclined surfaces between the middle part and the two side edges. The hollow shaft 2 is provided with locking disks 8 on both sides of the locking sleeve 6. The adjacent sides of the bottom of the two locking disks 8 are respectively provided with compression inclined surfaces corresponding to the smooth inclined surfaces. A locking bolt 9 is connected between the two locking disks 8. When connected, the two locking disks 8 are pulled relative to each other by the locking bolt 9 to slide toward the locking sleeve 6, so that the compression inclined surfaces at the bottom of the two locking disks 8 contact with the smooth inclined surfaces and compress the locking sleeve 6. The locking sleeve 6 contracts and compresses the hollow shaft 2 inwardly with the cooperation of the gap 7, and the expansion sleeve 12 is compressed to hug the main shaft 3 to achieve connection. Figure 5 As shown, the locking device can also be adopted by sleeve clamp 10 on the outside of hollow shaft 2, and the hollow shaft 2 is compressed by locking bolt 9 on clamp clamp 10 to shrink inwardly and compress tension sleeve 12 to clamp main shaft 3 to achieve connection.

[0021] like Figure 1 and Figure 2 As shown, there are two locking slits 4 of the reducer hollow shaft, and the two locking slits 4 of the reducer hollow shaft are preferably symmetrically arranged, and a protective hole 11 connected to the locking slit 4 of the reducer hollow shaft is arranged at the inner end of the locking slit 4 of the reducer hollow shaft on the hollow shaft 2, and the diameter of the protective hole 11 is larger than the width of the locking slit 4 of the reducer hollow shaft. The protective hole 11 can prevent the concentrated stress generated at the inner end of the locking slit 4 of the reducer hollow shaft when the hollow shaft 2 shrinks, thereby preventing the fracture caused by the concentrated stress.

[0022] When the utility model is used, the tension sleeve 12 is sleeved in the hollow shaft 2, the main shaft 3 is inserted into the tension sleeve 12, and the two locking plates 8 are relatively pulled to slide toward the locking sleeve 6 through the locking bolt 9, so that the compression inclined surfaces at the bottom of the two locking plates 8 contact the smooth inclined surfaces and compress the locking sleeve 6, and the locking sleeve 6 contracts and compresses the hollow shaft 2 under the cooperation of the gap 7, and the hollow shaft 2 contracts and compresses the tension sleeve 12 under the cooperation of the hollow shaft locking seam 4 of the reducer. Similarly, the tension sleeve 12 contracts inwardly and hugs the main shaft 3 under the cooperation of the sleeve locking seam 5, so that the inner surface of the hollow shaft 2 and the outer surface of the tension sleeve 12, and the inner surface of the tension sleeve 12 and the outer surface of the main shaft 3 are tightly combined and locked, so that the hollow shaft 2, the tension sleeve 12, and the main shaft 3 are tightly connected together.

[0023] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship in the present invention are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A hollow shaft protection device for a reducer is arranged between the main shaft of the operating equipment and the hollow shaft of the reducer. A locking slit for the hollow shaft of the reducer extending along the axial direction is arranged on the outer side wall of the hollow shaft. A locking device is sleeved on the outer peripheral side of the hollow shaft. The device is characterized in that: The hollow shaft is sleeved with a tension sleeve for inserting the main shaft, the shape of the outer peripheral surface of the tension sleeve is matched with the shape of the inner peripheral surface of the hollow shaft, and a sleeve locking seam is arranged on the tube wall of the tension sleeve along the axial direction.

2. The hollow shaft protection device for a reducer according to claim 1, characterized in that: The sleeve locking seam is a single seam that runs through the tube wall of the expansion sleeve, and the width of the sleeve locking seam is 2-4 mm.

3. The hollow shaft protection device for a reducer according to claim 1, characterized in that: The tension sleeve is a stepped tube whose hardness is greater than that of the main shaft and the hollow shaft.

4. The hollow shaft protection device for a reducer according to claim 1, characterized in that: The locking device is a locking sleeve mounted on the outer peripheral side of the hollow shaft, a gap is provided on the locking sleeve, the middle part of the outer peripheral surface of the locking sleeve is raised, and there is a smooth inclined surface between the middle part and the two side edges, the hollow shaft is respectively mounted with locking disks on both sides of the locking sleeve, and the adjacent sides of the bottom of the two locking disks are respectively provided with a clamping inclined surface corresponding to the smooth inclined surface, and a locking bolt is connected between the two locking disks.

5. The hollow shaft protection device for a reducer according to any one of claims 1 to 4, characterized in that: The reducer hollow shaft has two locking slits, and a protective hole connected to the locking slit of the reducer hollow shaft is arranged on the hollow shaft at the inner end of the locking slit of the reducer hollow shaft, and the diameter of the protective hole is larger than the width of the locking slit of the reducer hollow shaft.

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