CN110690782A - Vibration-damping air-cooling woodworking electric spindle - Google Patents

Abstract

A vibration-reducing air-cooled woodworking electric spindle, comprising a main shaft, a stator, a rotor, a casing sleeved on the outer sides of the aforementioned three, a front cover and a rear cover fixed to the casing, and the front shaft extension end of the main shaft is supported by a first bearing. A front nut for cooperating with the front cover is sleeved on the front cover, the rear axle extension end of the main shaft is supported on the rear cover through a second bearing, and a rear sealing ring for cooperating with the rear cover is sleeved on it, A labyrinth ring structure is arranged on the mating surface of the front nut and the front cover, and the mating surface of the rear sealing ring and the rear cover, and the dustproof effect is remarkable; it also includes the arrangement between the front cover and the outer ring of the first bearing and between the rear cover and the rear cover. The vibration damping pad between the outer rings of the second bearing has a remarkable damping effect; it also includes a first air-cooled cooling system arranged on the casing and the rear cover for indirectly taking away the heat generated in the casing for heat dissipation, and The second air-cooled cooling system on the side of the front end of the casing is used to directly take away the heat generated in the casing from the side for heat dissipation, and the cooling effect is obvious.

Description

A vibration-reduced air-cooled woodworking electric spindle

technical field

The invention relates to a woodworking electric spindle technology, in particular to a woodworking electric spindle device with vibration reduction and high-efficiency air cooling.

Background technique

The research and development of high-speed motorized spindles for woodworking is an effective means to achieve high-speed processing in the wood industry. The inhomogeneity and anisotropy of wood make it have different properties and strengths in different directions, and the angle acting on the direction of wood fibers during cutting is different. . Therefore, the woodworking electric spindle needs to have excellent vibration damping performance. At the same time, due to the special processing environment of wood, the woodworking electric spindle should not be cooled by liquid, but the heating problem in the electric spindle equipment is more serious. The patent discloses a high-speed woodworking electric spindle, which adopts air-cooled heat dissipation and solves the requirements of axial force, radial force and rigidity, but the heat dissipation effect of this product is not obvious, and the problem of vibration reduction is not considered. The present invention makes further improvements on the basis of this patent, especially in terms of vibration reduction and cooling of the woodworking electric spindle. .

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a novel high-speed woodworking electric spindle with high-efficiency vibration reduction and high-efficiency air-cooling performance.

The object of the present invention is achieved by adopting the following technical solutions. According to the present invention, a vibration-damping air-cooled woodworking electric spindle includes a main shaft, a stator, a rotor, a casing that is sleeved on the outside of the above three, a front cover and a rear cover that are fixed to the casing, and the front shaft extension end of the main shaft. The first bearing is supported on the front cover and sleeved with a front nut for cooperating with the front cover, and the rear axle extension end of the main shaft is supported on the rear cover through the second bearing, and is sleeved on the front cover for cooperating with the rear cover. A labyrinth ring structure is arranged on the mating surface of the front nut and the front cover, and the mating surface of the rear sealing ring and the rear cover; it also includes a labyrinth ring structure arranged between the front cover and the outer ring of the first bearing and between the rear cover and the rear cover. The vibration damping pad between the outer rings of the second bearing and the first air-cooled cooling system is arranged on the housing and the rear cover and used to indirectly take away the heat generated in the housing for heat dissipation when the electric spindle is working.

Further, the first air-cooled cooling system includes a rear fan blade installed on the rear axle extension end of the main shaft, a plurality of cooling fins arranged in parallel on the side surface of the casing, arranged on the rear cover and installed on the casing at the rear cover. The cooling fins are used to cover the ventilation openings for the cooling air drawn in by the rotating rear fan blades to pass and blow to the cooling fins to indirectly take away the heat generated inside the housing when the motorized spindle is working.

Further, the rear end of the rear cover is provided with a dust cover covering the outside of the rear fan blades, and the dust cover is provided with ventilation holes for the rotating rear fan blades to draw in cold air when the electric spindle is working.

Further, the vibration-damping air-cooled woodworking electric spindle also includes a second air-cooled cooling system disposed on the side of the front end of the casing and directly taking away the heat generated in the casing from the side during operation of the electric spindle to dissipate heat.

Further, the second air-cooled cooling system includes a through hole disposed on the side of the front end of the casing and for the heat generated in the casing to be dissipated to the outside when the electric spindle works, a motor disposed at the through hole, and an output shaft installed on the electric motor. The side wind blades that are turned on and rotate when the electric spindle is working to directly take away the heat emitted from the through holes.

Further, a pressing plate for installing the motor is arranged at the through hole, and a plate rib is arranged between the pressing plate and the casing.

Further, the second air-cooled cooling system also includes a dust cover that is covered on the outside of the side fan blades, the upper and lower sides of the dust cover are connected to the casing, the left side is connected to the front cover, and the end surface of the dust cover is provided with a rotating The heat carried by the side wind blades is discharged to the external heat dissipation holes.

Further, the vibration damping pad adopts a rubber pad.

Further, the first bearing is an angular contact ball bearing, and the second bearing is a deep groove ball bearing.

In the present invention, damping pads are arranged between the front cover and the outer ring of the bearing and between the rear cover and the outer ring of the bearing, which not only has a simple structure, but also has a remarkable effect, so that the woodworking electric spindle has excellent damping performance. At the same time, the invention adopts an indirect air-cooling heat dissipation method at the rear end of the electric spindle, and adopts a direct air-cooling heat dissipation method symmetrically on both sides of the front end, which not only has a simple structure, but also has an obvious cooling effect. solve.

The above description is only an overview of the technical solution of the present invention, in order to understand the technical means of the present invention more clearly, it can be implemented according to the content of the description, and in order to make the above and other objects, features and advantages of the present invention more obvious and easy to understand , the following specific preferred embodiments, and in conjunction with the accompanying drawings, are described in detail as follows.

Description of drawings

1 is an axonometric view of the overall structure of a vibration-damping air-cooled woodworking electric spindle of the present invention;

Fig. 2 is a transverse sectional view of the overall structure of a vibration-damping air-cooled woodworking electric spindle of the present invention;

Fig. 3 is the right side view of the dust-proof cover removed from the overall structure of a vibration-damping air-cooled woodworking electric spindle of the present invention;

4 is a front view of the overall structure of a vibration-damping air-cooled woodworking motorized spindle according to the present invention without a dust cover;

Fig. 5 is the schematic diagram of the rear cover in the present invention;

Figure 6 is an axonometric view of the housing in the present invention;

Fig. 7 is the schematic diagram of dust cover in the present invention;

FIG. 8 is a left side view of the overall structure of a vibration-damping air-cooled woodworking electric spindle according to the present invention.

[reference number]

1-spindle; 2-front nut; 3-front cover; 4-front gimbal; 5-dust cover; 6-shell; 7-stator; 8-rotor; 9-back cover; 10-dust cover; 11- Rear gasket; 12- Rear fan blade; 13- Rear sealing ring; 14- Rear rubber pad; 15- Deep groove ball bearing; 16- Rear balance ring; 17- Side fan blade; 18- Lock nut; 19 - motor; 20- front rubber pad; 21- angular contact ball bearing; 22- felt pad; 23- wire; 24- junction box; 101- vent; 501- drilling; 502- cooling hole; 503- drilling; 602 - heat sink; 603 - side through hole; 604 - pressure plate; 605 - plate rib.

Detailed ways

The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. For convenience of description, in this embodiment, the position where the front cover 3 is located is defined as "front", and the position where the rear cover 9 is located is defined as "rear".

Referring to FIGS. 1 to 8 , a vibration-reducing air-cooled woodworking motorized spindle of the present invention includes a main shaft 1 . The front shaft extension end of the main shaft 1 is supported on the front cover 3 through an angular contact ball bearing 21 , and the rear shaft extension end passes through a deep groove. The ball bearing 15 is supported on the rear cover 9, and the front cover 3 and the rear cover 9 are fixedly connected to the casing 6 with an internal cavity along the axial direction through screws. The junction box 24 connected to the rotor coil and the motor and the wires 23 used to connect the junction box to the power supply. The main shaft 1 is equipped with a rotor 8 matched with the aforementioned stator, a front gimbal ring 4 and a rear gimbal ring 16 installed on the front and rear ends of the rotor and used for matching with the rotor through interference fit; the front shaft extension end of the main shaft 1 The upper cover is provided with a front nut 2 for cooperating with the front cover 4, and the rear shaft extension end is provided with a rear sealing ring 13 for cooperating with the rear cover 9. The mating surface of the front nut 2 and the front cover 3, the rear sealing ring A labyrinth ring structure is arranged on the mating surface with the rear cover 9, and the dustproof problem of the high-speed woodworking electric spindle can be effectively solved by the front and rear two sealing ring structures.

On the basis of the aforementioned structure, a vibration-damping air-cooled woodworking motorized spindle of the present invention further includes a motor shaft disposed between the front cover 3 and the outer ring of the angular contact ball bearing 21 and between the rear cover 9 and the outer ring of the deep groove ball bearing 15 . The two damping pads, which are used to suppress the vibration generated when the electric spindle is working, are arranged on the casing 6 and the back cover 9 and are used to indirectly take away the heat generated in the casing when the electric spindle is working to dissipate heat. Air-cooled cooling system.

In this embodiment, the two vibration damping pads are the front rubber pad 20 and the rear rubber pad 14 respectively. The outer ring of the angular contact ball bearing 21 and the front rubber pad 20 have a very small clearance fit. The front cover 3 and the front rubber pad 20 are Interference fit; the outer ring of the deep groove ball bearing 15 and the rear rubber pad 14 have a very small clearance fit, and the rear cover 9 and the rear rubber pad 14 have an interference fit. The front and rear rubber pads can effectively solve the problem of the woodworking electric spindle. vibration problems.

The first air-cooled cooling system includes a rear fan blade 12 mounted on the rear end of the main shaft 1 and located in the rear cover 9, and a plurality of cooling fins 602 arranged in parallel on the side of the casing and extending along the axial direction of the casing. 2. It is arranged on the rear cover 9 and can cover the aforementioned cooling fins 602 when the rear cover is installed on the casing. The cold air drawn in by the rotating rear fan blades when the electric spindle is working passes and blows to the cooling fins to indirectly The air vent 101 takes away the heat generated inside the casing. When the motorized main shaft is working, the rear fan blades 12 rotate synchronously with the main shaft 1, and the external cold air is drawn into the rear cover. The heat dissipated in the casing is indirectly taken away by the heat sink 602 to achieve the purpose of indirect heat dissipation. In this embodiment, the rear fan blades 12 are fixed on the rear axle extension end of the main shaft 1 by interference fit, and the fan blades are further fixed by the rear tightening pads 11 and screws; There are cooling fins 602 on both sides, and four air vents 101 that are symmetrical up and down and left and right are arranged on the rear cover 9. When the rear cover is installed on the housing, the two ventilation openings on the left side of the rear cover can cover the cover. The heat sink located on the left side of the casing and the two air vents located on the right side of the rear cover can cover the heat sink located on the right side of the casing to improve the heat dissipation efficiency; The dust cover 10 on the outside of the rear fan blade, the dust cover 10 is provided with a ventilation hole for the rear fan blade to rotate when the electric spindle is working to draw cold air into the rear cover. The fan blade is damaged when it touches the rear. On the other hand, the cleanliness of the rear cover is maintained, and the dustproof performance of the electric spindle is further improved.

In order to further improve the heat dissipation performance of the electric spindle, a vibration-reduced air-cooled woodworking electric spindle of the present invention also includes a side surface arranged at the front end of the casing 6 and directly takes away the heat generated in the casing from the side when the electric spindle is working to dissipate heat. The second air-cooled cooling system includes a through hole 603 that is arranged on the side of the front end of the casing 6 and allows the heat generated in the casing to dissipate outward when the electric spindle is working, and a through hole 603 disposed at the through hole 603. The motor 19, the side fan blade 17, which is installed on the output shaft of the motor and rotates when the electric spindle is working to directly take away the heat emitted from the through hole 603. When the electric spindle is working, the motor 19 rotates to drive the side fan blade. 17 is rotated, and the heat radiated from the through hole 603 is directly discharged to the outside, so as to realize the side air cooling of the woodworking electric spindle. In this embodiment, in order to achieve the purpose of excellent heat dissipation, a through hole 603 is respectively provided on the left and right sides of the front end of the casing 6, and a pressure plate 604 is arranged at each through hole 603. A motor 19 is installed on each pressing plate 604 of the stabilizing plate rib 605 , the side fan blades are matched with the output shaft of the motor through a key connection, and the side fan blades 17 are fixed by the locking nut 18 . In addition, the second air-cooled cooling system also includes a dust cover 5 covering the outer side of the side fan blades 17. The end surface of the dust cover is provided with heat dissipation holes 502 for the heat carried by the rotating side fan blades 17 to be discharged to the outside world. A first drill hole 501 is provided on the side for connecting with the housing 6 by screws, and a second drill hole 503 is provided on the left side for connecting with the front cover on the same side by screws. On the one hand, the existence of the dust cover It can avoid the damage of the fan blades caused by accidentally touching the side fan blades, and on the other hand, keep the cleanliness of the motor and the side fan blades and prolong their service life.

The above is only the preferred embodiment of the present invention, any simple modification or equivalent to the above embodiment made according to the technical essence of the present invention by any person skilled in the art without departing from the scope of the technical solution of the present invention Changes and modifications still fall within the scope of the technical solutions of the present invention.

Claims (9)

1. A vibration-reduced air-cooled woodworking electric spindle, comprising a main shaft, a stator, a rotor, a casing set on the outside of the aforementioned three, a front cover and a rear cover fixedly connected to the casing, and the front shaft extension end of the main shaft passes through the first The bearing is supported on the front cover and is sleeved with a front nut for cooperating with the front cover, and the rear axle extension end of the main shaft is supported on the rear cover through the second bearing and is sleeved with a rear seal for cooperating with the rear cover. A labyrinth ring structure is arranged on the mating surface of the front nut and the front cover, and the mating surface of the rear sealing ring and the rear cover. The vibration damping pad between the outer ring of the second bearing and the casing is arranged on the casing and the rear cover and is used to indirectly take away the heat generated in the casing to dissipate heat when the electric spindle is working. 2. The vibration-reduced air-cooled woodworking motorized spindle according to claim 1, wherein the first air-cooled cooling system comprises a rear fan blade installed on the rear axle extension end of the main shaft, a rear fan blade arranged on the side of the casing in parallel A plurality of cooling fins are arranged on the rear cover and can cover the aforementioned cooling fins when the rear cover is installed on the casing, and are used for the cooling air drawn in by the rotating rear fan blades to pass through and blow to the cooling fins when the electric spindle is working A vent to indirectly remove the heat generated inside the housing. 3. The vibration-damping air-cooled woodworking motorized spindle according to claim 2, wherein the rear end of the rear cover is provided with a dust cover that is arranged on the outside of the rear fan blade, and the dust cover is provided with an electric spindle to work Ventilation holes through which the rotating rear fan blades draw cool air from time to time. 4. The vibration-damping air-cooled woodworking electric spindle according to claim 1, characterized in that: it further comprises a side surface arranged on the front end of the shell and directly takes away the heat generated in the shell from the side when the electric spindle is working to dissipate heat. The second air-cooled cooling system. 5. The vibration-reduced air-cooled woodworking motorized spindle according to claim 4, wherein the second air-cooled cooling system comprises a side surface arranged on the front end of the housing and allows the heat generated in the housing to be radiated to the outside when the motorized spindle works The through hole, the motor arranged at the through hole, and the side fan blade which is installed on the output shaft of the motor and rotates when the electric spindle works to directly take away the heat emitted from the through hole. 6 . The vibration-damping air-cooled woodworking electric spindle according to claim 5 , wherein the through hole is provided with a pressure plate for installing the motor, and a plate rib is arranged between the pressure plate and the housing. 7 . 7. The vibration-damping air-cooled woodworking motorized spindle according to claim 5, wherein the second air-cooled cooling system further comprises a dust cover arranged on the outside of the side wind blades, the upper and lower sides of the dust cover and the shell The left side is connected with the front cover, and the end surface is provided with heat dissipation holes for the heat carried by the rotating side fan blades to be discharged to the outside. 8. The vibration-damping air-cooled woodworking electric spindle according to any one of claims 1-7, wherein the vibration-damping pad is a rubber pad. 9 . The vibration-reduced air-cooled woodworking electric spindle according to claim 1 , wherein the first bearing is an angular contact ball bearing, and the second bearing is a deep groove ball bearing. 10 .

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