Electric spindle with external motor

Abstract

The utility model relates to the technical field of motorized spindles, and discloses a motor external type motorized spindle which comprises a shell, a connecting shaft is arranged in the center of the interior of the shell, limiting grooves are formed in the front end and the rear end of the outer side wall of the connecting shaft, second bearings are arranged in the two limiting grooves, and second flange plates are arranged on the front end face and the rear end face of the shell. A partition structure is arranged on the rear end face of the second flange plate located at the rear position, a third flange plate is arranged at the rear end of the partition structure, a rear cover is fixedly connected to the rear end face of the third flange plate, a grid is arranged at the center of the rear end face of the rear cover, and a third bearing is fixedly connected to the center of the front end face of the grid. According to the utility model, the heat is blocked through the partition structure, the influence of the heat on the connecting shaft and the main shaft rod is reduced, and the third clamping groove, the two second clamping grooves and the first clamping groove are matched with each other for connection, so that the mounting is convenient, and meanwhile, the quick disassembly and maintenance can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of electric spindles, in particular to an electric spindle with an external motor. Background Art

[0002] The electric spindle is a key component of mechanical equipment such as CNC machine tools and machining centers. It is usually composed of motors, spindles, bearings, cooling devices and other components. The function of the electric spindle is to provide processing power for the machine tool, enabling the machine tool to perform high-speed and high-precision metal processing. In order to facilitate the maintenance of the motor, some electric spindles have the motor installed on the outside of the electric spindle for easy maintenance.

[0003] During the use of the existing motor-external electric spindle, the conical rotor and the spindle rod are integrally arranged, which is easily affected by the heat of the motor during long-term use. Therefore, those skilled in the art provide a motor-external electric spindle to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, and a motor-external electric spindle is proposed. When in use, the conical rotor drives the fan blades to rotate, and the fan blades blow the external cool air into the interior of the rear cover. The hot air is blocked by the heat insulation board and then flows to the outside through the one-way valve, so that the influence of the spindle rod and the connecting shaft on the heat of the motor is minimized.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an external motor electric spindle, comprising a housing, a connecting shaft is provided at the center of the housing, limiting grooves are provided at the front and rear ends of the outer wall of the connecting shaft, and second bearings are provided inside the two limiting grooves, and second flanges are provided on both the front and rear end surfaces of the housing, and a partition structure is provided at the rear end of the second flange, and a third flange is provided at the rear end of the partition structure, and a rear cover is fixedly connected to the rear end surface of the third flange, a grid is provided at the center of the rear end surface of the rear cover, and a third bearing is fixedly connected to the center of the front end surface of the grid;

[0006] A conical stator is provided on the inner wall of the rear cover, a conical rotor is rotatably connected to the inner side of the conical stator, a first clamping groove is provided at the center of the front end surface of the conical rotor, a fan blade is provided at the rear end of the conical rotor, the rear end of the connecting shaft passes through the partition structure to the rear end of the partition structure, and second clamping grooves are provided at both ends, a front cover is provided at the front end of the housing, a front cover plate is provided at the front end surface of the front cover, a main shaft rod is provided inside the front cover, and a third clamping groove is provided at the rear end surface of the main shaft rod;

[0007] Through the above technical solution, the heat is blocked by the partition structure to reduce the influence of heat on the connecting shaft and the main shaft rod, and then the conical rotor, the connecting shaft and the main shaft rod are connected by the third slot, the two second slots and the first slot cooperating with each other, which is convenient for installation and can be quickly disassembled and maintained.

[0008] Furthermore, the partition structure includes a heat insulation board and a plurality of mounting holes, wherein the plurality of mounting holes are arranged in a circular shape at the front end surface of the heat insulation board near the edge and are respectively located at the same positions as the through holes on the second flange and the third flange;

[0009] Through the above technical solution, the heat is isolated by the heat insulation plate, and then installed in coordination with the second flange and the third flange through a plurality of installation holes.

[0010] Further, the front end of the main shaft rod passes through the rear end surface of the front cover plate to the front end of the front cover plate, and a first bearing is sleeved on the outer side wall of the main shaft rod. The outer ring of the first bearing is arranged on the front end surface of the front cover plate and passes through the front cover plate to the rear end surface of the front cover plate.

[0011] Through the above technical solution, it is convenient to support the main shaft rod through the first bearing to improve stability.

[0012] Furthermore, a one-way valve is provided at the front center of the upper end surface of the rear cover;

[0013] Through the above technical solution, hot air can be discharged while preventing dust from entering the rear cover.

[0014] Further, the first card slot, the two second card slots and the third card slot are symmetrically arranged as two quarter-circular grooves, and a circular groove is provided at the connecting position, and the depth of the circular groove is half of the two quarter-circular grooves. The first card slot, the two second card slots and the third card slot are all provided with stop screws at the end of the outer side wall, and the first card slot and the second card slot at the rear and the third card slot and the second card slot at the front are respectively connected by eight stop screws;

[0015] Through the above technical solution, it is convenient to connect the conical rotor, the connecting shaft and the main shaft rod through the first clamping groove, the two second clamping grooves and the third clamping groove.

[0016] Furthermore, a first flange is provided on the rear end surface of the front cover;

[0017] The above technical solution makes it convenient to fix the front cover by cooperating with the second flange at the front.

[0018] Furthermore, a filter element is provided on the front end surface of the grid;

[0019] Through the above technical solution, the air entering the rear cover is filtered of moisture and dust through the filter element to prevent the internal conical rotor and conical stator from being affected.

[0020] The utility model has the following beneficial effects:

[0021] 1. In the utility model, when the motor-external electric spindle is in use, the conical rotor drives the fan blades to rotate, and the fan blades blow the cool air from the outside into the rear cover. The hot air is blocked by the heat insulation board and then flows to the outside through the one-way valve, so that the influence of the spindle rod and the connecting shaft on the heat of the motor is minimized.

[0022] 2. In the utility model, the main shaft rod and the connecting shaft are spliced ​​together through the second slot and the third slot, and then fixed by four limit screws. The main shaft rod is arranged in a stepped shape and is connected to the connecting shaft through one end, which is convenient for replacing main shaft rods of different diameters and improving flexibility of use.

[0023] 3. In the utility model, the conical rotor is removed by removing the bolts fixing the second flange and the third flange, and by taking out the limit screws on the outside of the first slot and the second slot, so as to facilitate the maintenance of the motor. When in use, the motor is supported by the first bearing, the two second bearings and the third bearing at the same time, so as to improve the stability during rotation, and then the moisture and dust entering are filtered by the filter element, so as to reduce the influence of moisture and dust on the conical rotor and the conical stator. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional diagram of a motor-external electric spindle proposed by the utility model;

[0025] Figure 2 This is a three-dimensional cross-sectional view of a motor-external electric spindle proposed by the utility model;

[0026] Figure 3 A three-dimensional diagram of a motor-external electric spindle proposed by the utility model;

[0027] Figure 4 for Figure 2 A magnified schematic diagram of center A.

[0028] Legend:

[0029] 1. Outer shell; 2. Front cover; 3. First bearing; 4. Main shaft; 5. Front cover; 6. First flange; 7. Second flange; 8. Third flange; 9. One-way valve; 10. Rear cover; 11. Grid; 12. Conical rotor; 13. Fan blades; 14. Second bearing; 15. Connecting shaft; 16. Third bearing; 17. Conical stator; 18. First slot; 19. Limiting slot; 20. Second slot; 21. Limiting screw; 22. Third slot; 23. Partition structure; 2301. Heat insulation board; 2302. Mounting hole. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Reference Figure 1-4 The utility model provides an embodiment: an external motor electric spindle, including a shell 1, a connecting shaft 15 is provided at the center of the shell 1, and limiting grooves 19 are provided at the front and rear ends of the outer wall of the connecting shaft 15. Second bearings 14 are provided inside the two limiting grooves 19, and second flanges 7 are provided on the front and rear end surfaces of the shell 1. A partition structure 23 is provided at the rear end surface of the second flange 7 at the rear, and a third flange 8 is provided at the rear end of the partition structure 23. A rear cover 10 is fixedly connected to the rear end surface of the third flange 8. A grid 11 is provided at the center of the rear end surface of the rear cover 10. The grid 11 is used to reduce large foreign objects from entering the rear cover 10, and a third bearing 16 is fixedly connected to the center of the front end surface of the grid 11.

[0032] A conical stator 17 is provided on the inner wall of the rear cover 10, and a conical rotor 12 is rotatably connected to the inner side of the conical stator 17. The conical rotor 12 is supported by a third bearing 16. A first slot 18 is provided at the center of the front end surface of the conical rotor 12, and a fan blade 13 is provided at the rear end of the conical rotor 12. The rear end of the connecting shaft 15 passes through the partition structure 23 and reaches the rear end of the partition structure 23, and second slots 20 are provided at both ends. A front cover 2 is provided at the front end of the shell 1, and a front cover plate 5 is provided on the front end surface of the front cover 2. A main shaft rod 4 is provided inside the front cover 2. The heat is blocked by the partition structure 23 to reduce the influence of the heat on the connecting shaft 15 and the main shaft rod 4. A third slot 22 is provided on the rear end surface of the main shaft rod 4, and the conical rotor 12, the connecting shaft 15 and the main shaft rod 4 are connected by the third slot 22, the two second slots 20 and the first slot 18, which is convenient for installation and can be quickly disassembled and maintained.

[0033] The partition structure 23 includes a heat insulation plate 2301 and a plurality of mounting holes 2302. The plurality of mounting holes 2302 are arranged in a circular shape at the edge of the front end surface of the heat insulation plate 2301, and are respectively located at the same positions as the through holes on the second flange 7 and the third flange 8. The heat is isolated by the heat insulation plate 2301, and then the plurality of mounting holes 2302 are used to coordinately mount the second flange 7 and the third flange 8.

[0034] The front end of the main shaft rod 4 passes through the rear end face of the front cover plate 5 and reaches the front end of the front cover plate 5. A first bearing 3 is sleeved on the outer wall of the main shaft rod 4. The outer ring of the first bearing 3 is arranged on the front end face of the front cover plate 5 and passes through the front cover plate 5 to reach the rear end face of the front cover plate 5. It is convenient to support the main shaft rod 4 through the first bearing 3 to improve stability. A one-way valve 9 is provided at the front center of the upper end face of the rear cover 10 to discharge hot air while preventing dust from entering the rear cover 10.

[0035] The first slot 18, the two second slots 20 and the third slot 22 are all symmetrically arranged as two quarter-circular grooves, and a circular groove is provided at the connected position, and the depth of the circular groove is half of the two quarter-circular grooves. The outer walls of the first slot 18, the two second slots 20 and the third slot 22 are all provided with limit screws 21 near the end. The first slot 18 and the second slot 20 at the rear and the third slot 22 and the second slot 20 at the front are connected by eight limit screws 21 respectively, so that the conical rotor 12, the connecting shaft 15 and the main shaft rod 4 can be conveniently connected through the first slot 18, the two second slots 20 and the third slot 22. The rear end face of the front cover 2 is provided with a first flange 6, which is convenient for fixing the front cover 2 in cooperation with the second flange 7 at the front. The front end face of the grid 11 is provided with a filter element, and the air entering the rear cover 10 is filtered by the filter element to prevent affecting the internal conical rotor 12 and the conical stator 17.

[0036] Working principle: During installation, first install the second bearing 14 at the rear end in the limiting groove 19 at the rear, then install the main shaft rod 4 in the housing 1, install the second bearing 14 in the limiting groove 19 at the front, splice the first slot 18 at the front end of the conical rotor 12 with the second slot 20 at the rear, splice the third slot 22 at the rear end of the main shaft rod 4 with the second slot 20 at the front, fix them with the limiting screw 21, align the heat insulation board 2301, the third flange 8 and the second flange 7 at the rear, and then fix them with bolts, and then align the first flange 6 with the second flange 7 at the front and fix them to complete the installation.

[0037] When in use, the conical rotor 12 drives the fan blades 13 to rotate, and the fan blades 13 blow the cool air from the outside into the rear cover 10. The hot air is blocked by the insulation board 2301 and then flows outward through the one-way valve 9, so that the influence of the main shaft rod 4 and the connecting shaft 15 on the heat of the motor is minimized. The main shaft rod 4 is arranged in a stepped shape and is connected to the connecting shaft 15 at one end, which is convenient for replacing main shaft rods 4 of different diameters and improving the flexibility of use. The conical rotor 12 is removed by removing the bolts fixing the second flange 7 and the third flange 8, and removing the limit screws 21 on the outside of the first slot 18 and the second slot 20, so as to facilitate the maintenance of the motor. When in use, it is supported by the first bearing 3, the two second bearings 14 and the third bearing 16 at the same time to improve the stability during rotation, and then the moisture and dust entering are filtered through the filter element to reduce the influence of moisture and dust on the conical rotor 12 and the conical stator 17.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A motor-external electric spindle, comprising a housing (1), characterized in that: A connecting shaft (15) is provided at the center of the interior of the housing (1), and limiting grooves (19) are provided at both the front and rear ends of the outer wall of the connecting shaft (15), and second bearings (14) are provided inside the two limiting grooves (19). Second flanges (7) are provided on both the front and rear end surfaces of the housing (1), and a partition structure (23) is provided at the rear end surface of the second flange (7) at the rear, and a third flange (8) is provided at the rear end of the partition structure (23), and a rear cover (10) is fixedly connected to the rear end surface of the third flange (8), and a grid (11) is provided at the center of the rear end surface of the rear cover (10), and a third bearing (16) is fixedly connected to the center of the front end surface of the grid (11); A conical stator (17) is provided on the inner wall of the rear cover (10), a conical rotor (12) is rotatably connected to the inner side of the conical stator (17), a first clamping groove (18) is provided at the center of the front end surface of the conical rotor (12), a fan blade (13) is provided at the rear end of the conical rotor (12), the rear end of the connecting shaft (15) passes through the partition structure (23) to the rear end of the partition structure (23), and second clamping grooves (20) are provided at both ends, a front cover (2) is provided at the front end of the housing (1), a front cover plate (5) is provided at the front end surface of the front cover (2), a main shaft rod (4) is provided inside the front cover (2), and a third clamping groove (22) is provided at the rear end surface of the main shaft rod (4).

2. The motor-external electric spindle according to claim 1, characterized in that: The partition structure (23) comprises a heat insulation plate (2301) and a plurality of mounting holes (2302); the plurality of mounting holes (2302) are arranged in a circular shape at the front end surface of the heat insulation plate (2301) close to the edge and are respectively located at the same positions as the through holes on the second flange (7) and the third flange (8).

3. The motor-external electric spindle according to claim 1, characterized in that: The front end of the main shaft rod (4) passes through the rear end surface of the front cover plate (5) and reaches the front end of the front cover plate (5); a first bearing (3) is sleeved on the outer wall of the main shaft rod (4); an outer ring of the first bearing (3) is arranged on the front end surface of the front cover plate (5) and passes through the front cover plate (5) and reaches the rear end surface of the front cover plate (5).

4. The motor-external electric spindle according to claim 1, characterized in that: A one-way valve (9) is provided at the front center of the upper end surface of the rear cover (10).

5. The motor-external electric spindle according to claim 1, characterized in that: The first clamping slot (18), the two second clamping slots (20) and the third clamping slot (22) are all symmetrically arranged as two quarter-circular grooves, and a circular groove is provided at the connecting position, and the depth of the circular groove is half of the two quarter-circular grooves. The outer side walls of the first clamping slot (18), the two second clamping slots (20) and the third clamping slot (22) are all provided with stop screws (21) at the end portions, and the first clamping slot (18) and the second clamping slot (20) at the rear and the third clamping slot (22) and the second clamping slot (20) at the front are respectively connected by eight stop screws (21).

6. The motor-external electric spindle according to claim 1, characterized in that: A first flange (6) is provided on the rear end surface of the front cover (2).

7. The motor-external electric spindle according to claim 1, characterized in that: The front end surface of the grid (11) is provided with a filter element.

Images