CN217590450U - Cantilever type hollow shaft motor - Google Patents

Abstract

The utility model discloses a cantilever type hollow shaft motor, including stator and the rotor of setting in the stator, the stator is only in the fixed end cover that is provided with in one side, be equipped with the bearing between end cover and the rotor, the end cover is kept away from on the terminal surface of stator the vertical fixation be provided with two at least round pin axles, the pivot of rotor is hollow. The utility model discloses it is very convenient when being connected and dismantling with the axle extension of the bearing body of milling machine and grinding roller, simultaneously the utility model discloses simplify the transmission structure, improved transmission efficiency, labour saving and time saving when maintenance, maintenance and dismouting, the dismouting is very convenient, efficient.

Description

Cantilever type hollow shaft motor

Technical Field

The utility model relates to a milling machine technical field especially relates to a cantilever type hollow shaft motor.

Background

The existing flour mill adopts grinding rollers with different rotating speeds for grinding, the grinding rollers are driven by a three-phase asynchronous motor to transmit power through a V belt, different rotating speeds are output through a mechanical speed changing device, and then the corresponding grinding rollers are driven to rotate. The rotating speed ratio is fixed and cannot be adjusted, and due to the defects of V-belt transmission, the phenomenon of losing rotation exists during transmission, the transmission efficiency is low, and the transmission structure of the flour mill is complex, and the time and the labor are wasted in maintenance, maintenance and disassembly.

Patent application with publication number CN202113885U discloses a flour mill, which comprises a base, a casing on the base, and a crushing roller and a material collecting box which are positioned in the casing, wherein a feeding cylinder is arranged on the upper part of the casing, a lifting pipe penetrating in the feeding cylinder extends into the material collecting box, the crushing roller is in driving connection with a motor at the bottom of the casing, the transmission structure is complex, and the maintenance, the maintenance and the dismounting are time-consuming and labor-consuming.

The patent application with publication number CN2294111 discloses a compound one-roller multipurpose flour mill, which belongs to a flour milling machine, and comprises three milling mouths and three grain feeding rollers which are formed by two motors, a fast-slow roller and a triangular belt, wherein the two motors drive the two fast-slow rollers, and the triangular belt drives the fast-slow roller through the motors, so that the problems of time and labor consumption in maintenance, maintenance and disassembly and assembly are also caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a cantilever type hollow shaft motor is provided for it is complicated to solve present milling machine transmission structure, and problem that maintenance, maintenance and dismouting are wasted time and energy.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

the utility model provides a cantilever type hollow shaft motor, includes stator and the rotor of setting in the stator, the stator only is provided with the end cover in one side is fixed, be equipped with the bearing between end cover and the rotor, the end cover is kept away from on the terminal surface of stator the vertical fixation be provided with two at least round pin axles, the pivot of rotor is hollow.

Further, one side that the end cover was kept away from to the rotor is equipped with the protective cover, it is gapped between protective cover and the rotor, the protective cover can be dismantled with the stator and be connected.

Further, be equipped with two at least convex openings on the protective cover, be equipped with the hexagon socket head cap screw of twisting on the stator in the opening, the opening uses the rotor as central equipartition, the centre of a circle of opening is located the central line of rotor, the one end of opening is equipped with the through-hole, through-hole and opening intercommunication, the through-hole major diameter is greater than hexagon screw's head diameter, the width size of opening is between hexagon screw's head diameter and hexagon screw's pole portion diameter.

Furthermore, a shaft shoulder is arranged on the part of the rotating shaft close to the end cover, one side of the inner ring of the bearing abuts against the shaft shoulder, and a shaft retainer ring is arranged on the other side of the rotating shaft on the inner ring of the bearing.

Furthermore, a step is arranged in the end cover, the step is close to the pin shaft, one side of the outer ring of the bearing abuts against the step, and the other side of the outer ring of the bearing, on the end cover, is provided with a hole retainer ring.

Further, the bearing is a deep groove ball bearing.

Furthermore, one end of the rotating shaft, which is far away from the end cover, is provided with a threaded blind hole.

The utility model discloses an actively the effect does:

1. the utility model discloses be equipped with round pin axle and hollow pivot, thereby make the utility model discloses it is very convenient when being connected and dismantling with the axle extension of the bearing body of milling machine and grinding roller. Simultaneously the utility model discloses simplify the transmission structure, improved transmission efficiency, labour saving and time saving when maintenance, maintenance and dismouting, the dismouting is very convenient, efficient.

2. The utility model discloses only be equipped with end cover and bearing in stator one side to make the mode that the rotor adopted the cantilever install in the stator, therefore convenient, rapid when stator and rotor are dismantled and are installed.

3. The utility model discloses be equipped with the protective cover, can form the protection to the rotor, prevent that it from damaging because of unexpected striking, guarantee the normal rotation of rotor.

Drawings

FIG. 1 is a schematic external view of embodiment 1 as seen from the end cap side;

FIG. 2 is a schematic external view of embodiment 1 as seen from the stator side;

FIG. 3 is a sectional view of embodiment 1;

FIG. 4 is an exploded view of example 1;

FIG. 5 is a use diagram of embodiment 1;

FIG. 6 is a cross-sectional view of FIG. 4 taken along the axial direction;

FIG. 7 is a sectional view of embodiment 2;

FIG. 8 is a schematic view of the end cap of example 3;

in the figure:

1. a rotor; 2. a stator; 3. a hole retainer ring; 4. a bearing; 5. a retainer ring for a shaft;

6. an end cap; 7. a pin shaft; 8. a screw; 9. a gasket; 10. a rotating shaft;

11. a protective cover; 12. a handle; 13. grinding the roller; 14. a bearing body; 15. an end cap;

16. opening the gap; 17. a threaded blind hole; 18. and (5) extending the shaft.

Detailed Description

Example 1

As shown in fig. 1 to 4, a cantilever type hollow shaft motor, which belongs to a permanent magnet synchronous motor, includes a stator 2 and a squirrel cage type rotor 1 arranged in the stator 2, the stator 2 is fixedly connected with an end cover 6 only at the left side through a screw 8 and a gasket 9, two discs of bearings 4 are arranged between the end cover 6 and the rotor 1 side by side, the bearings 4 are deep groove ball bearings, and a winding is arranged in the stator 2. The left surface of the end cover 6 is a lug which protrudes outwards along the radial direction, and the two lugs are symmetrical with the center of the rotor 1. The rotor is characterized in that the lugs are vertically provided with pin shafts 7, the pin shafts 1 are fixedly connected with the corresponding lugs through threads, and a rotating shaft 10 of the rotor 1 is hollow.

The outer circle of the rotating shaft 10 is provided with a shaft shoulder at a part close to the end cover 6, the right side of the inner ring of the right bearing 4 abuts against the shaft shoulder, and the left side of the inner ring of the left bearing 4 of the rotating shaft 10 is provided with a shaft retainer ring 5.

The inner part of the end cover 6 close to the left end is provided with a step, the left side of the outer ring of the bearing 4 close to the left is propped against the step, and the right side of the outer ring of the bearing 4 close to the right of the end cover 6 is provided with a hole retainer ring 3.

The rotor 1 is axially positioned in the stator 2 by means of a shaft retaining ring 5 and a bore retaining ring 3.

The practical use method of the present invention will be described with reference to fig. 5 and 6.

In fig. 5 and 6, a shaft extension 18 at the right end of a grinding roller 13 of the pulverizer is inserted into the rotating shaft 10 after penetrating through the bearing body 14, and two pin shafts 7 are respectively inserted into blind holes on the right side of the bearing body 14, so that the circumferential direction of the end cover 6 is positioned. The shaft extension 18 and the rotating shaft 10 are in transmission connection through a key.

The right end of the shaft extension 18 is provided with an end cap 15 with a disc-shaped right end, the end cap 15 is screwed on the right end of the shaft extension 18, and the right part of the end cap 15 is pressed on the bottom surface of a pit in the center of the rotating shaft 10, so that the left end of the rotating shaft 10 is propped against the right end of a positioning sleeve on the shaft extension 18, and the axial positioning of the shaft extension 18 in the rotating shaft 10 is realized.

The right end of the end cover 6 of the rotating shaft 10 is provided with three threaded blind holes 17, and the three threaded blind holes 17 are uniformly distributed along the circumferential direction. When the grinding roller is disassembled, the end cap 15 is only required to be unscrewed, and the screw is screwed in the threaded blind hole 17 and then pulled outwards, so that the grinding roller is easily disassembled from the grinding roller 12 along the shaft extension 18.

And simultaneously, the utility model discloses with grinding roller 13 lug connection, need not mechanical speed change gear, therefore simplified transmission structure, labour saving and time saving when maintenance, maintenance and dismouting, the dismouting is very convenient, efficient.

Each grinding roller 13 is provided with a cantilever type hollow shaft motor, and the rotating speed of each cantilever type hollow shaft motor is controlled through a frequency converter, so that the independent control of the rotating speed of each grinding roller 13 is realized, and the adjustment of the rotating speed and the rotating speed difference is facilitated.

Example 2

As shown in fig. 7, the rotor 1 is provided with a disc-shaped protecting cover 11 on the right side of the end cover 6, a gap is formed between the protecting cover 11 and the rotor 1, the protecting cover 11 is provided with a vent hole, and the protecting cover 11 is detachably connected with the stator 2 through a socket head cap screw.

The right end of the protective cover 11 is welded with a round handle 12.

The rotor 1 that can be right after setting up protective cover 11 forms the protection, prevents that it from damaging because of unexpected striking, guarantees the normal rotation of rotor 1, produces bodily injury to operating personnel when preventing rotor 1 from rotating simultaneously.

Example 3

As shown in fig. 8, four circular arc-shaped openings 16 are formed in the protecting cover 11, the socket head cap screws are respectively arranged in the corresponding openings 16, and the socket head cap screws are screwed on the right end surface of the stator 2. The openings 16 are uniformly distributed by taking the rotor 1 as a center, the circle center of each opening 16 is located on the central line of the rotor 1, one end of each opening 16 is provided with a through hole, the through holes are communicated with the openings 16, the major diameter of each through hole is larger than the diameter of the head of each socket head cap screw, and the width of each opening 16 is between the diameter of the head of each socket head cap screw and the diameter of the rod of each socket head cap screw.

After the opening 16 and the through hole are formed, the inner hexagon screw does not need to be unscrewed from the stator 2 when the protective cover 11 is detached or installed, so that the protective cover is more convenient to detach, and the inner hexagon screw is prevented from being lost.

The above-mentioned embodiments are described in detail and specifically, so as to explain the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, but not to limit the present invention, and the scope of the present invention should not be limited by the embodiment, i.e. all equivalent changes or modifications made by the spirit of the present invention, for researchers or technicians in the field, within the structure of the present invention, the local modifications inside the system and the changes, transformations, etc. between the subsystems are still within the scope of the present invention. At present, the technical scheme of the application has been subjected to a pilot plant test, namely a small-scale experiment before large-scale mass production of products; after the pilot test is finished, the investigation for the use of the user is carried out in a small range, and the investigation result shows that the satisfaction degree of the user is higher; the preparation of products for formal production for industrialization, including intellectual property risk early warning research, has been set forth.

Claims (7)

1. The utility model provides a cantilever type hollow shaft motor, its characterized in that includes stator (2) and rotor (1) of setting in stator (2), stator (2) are only fixed in one side and are provided with end cover (6), be equipped with bearing (4) between end cover (6) and rotor (1), vertical fixation is provided with two at least round pin axles (7) on the terminal surface of stator (2) is kept away from in end cover (6), pivot (10) of rotor (1) are hollow.

2. A hollow shaft electrical machine according to claim 1, characterised in that the side of the rotor (1) remote from the end cap (6) is provided with a protective cover (11), there is a gap between the protective cover (11) and the rotor (1), and the protective cover (11) is detachably connected to the stator (2).

3. A hollow shaft motor according to claim 2, characterized in that the protecting cover (11) is provided with at least two circular-arc-shaped notches (16), the notches (16) are provided with hexagon socket screws screwed on the stator (2), the notches (16) are uniformly distributed around the rotor (1), the center of the notch (16) is located on the center line of the rotor (1), one end of the notch (16) is provided with a through hole, the through hole is communicated with the notch (16), the major diameter of the through hole is larger than the head diameter of the hexagon screw, and the width of the notch (16) is between the head diameter of the hexagon screw and the rod diameter of the hexagon screw.

4. A cantilevered hollow shaft motor according to claim 1, wherein the part of the shaft (10) close to the end cap (6) is provided with a shoulder against which one side of the inner ring of the bearing (4) abuts, and the shaft (10) is provided with a shaft collar (5) on the other side of the inner ring of the bearing (4).

5. A hollow shaft motor according to claim 1, characterised in that the end cap (6) is provided with a step therein, the step is close to the pin (7), one side of the outer ring of the bearing (4) abuts against the step, and the end cap (6) is provided with a hole retainer ring (3) on the other side of the outer ring of the bearing (4).

6. A cantilevered hollow shaft motor according to claim 1, characterized in that said bearing (4) is a deep groove ball bearing (4).

7. A cantilevered hollow shaft motor according to claim 1, wherein the shaft (10) is provided with a blind threaded bore (17) at the end remote from the end cap (6).

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