Electric spindle

Abstract

The utility model discloses an electric spindle, which relates to the technical field of spindles, and comprises an electric spindle body, a plurality of bearing groups are arranged on the outer side of the electric spindle body, a bearing seat is arranged on the outer sides of the bearing groups, a gas storage block is filled with gas easy to expand when heated, and a plurality of groups of liquid outlets for slotting are formed in the bearing seat. And the plugging block is positioned below the liquid outlet. The gas storage block is filled with gas, such as oxygen, easy to expand after being heated through the gas inlet, when the electric spindle works, the volume of the oxygen in the gas storage block is increased after being heated and expanded, when the temperature is higher, lubricating oil in the bearing pack is consumed faster, the gas in the gas storage block expands larger, the size of the liquid outlet is larger, and the oil discharge amount is larger; when the temperature is lower, the oxygen expansion volume is smaller, the size of the liquid outlet is smaller, the oil discharge amount is smaller, and when the liquid outlet is located below the bearing seat, the consumption of lubricating oil can be reduced, so that the practicability and the flexibility of the whole electric spindle can be improved through the structure.

Description

Technical Field

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

[0002] An electric spindle refers to a shaft that receives power from an engine or a motor and transmits it to other machine parts. It is a main component in a mechanical transmission device, responsible for transmitting power from a power source (such as an engine or a motor) to a machine part that needs to rotate. Electric spindles are widely used in mechanical equipment such as machine tools, automobiles, ships, and airplanes.

[0003] The machine tool electric spindle is an important component of a machine tool. It is a key component on the machine tool, responsible for supporting and driving a cutter or a workpiece to perform a rotary motion. The machine tool electric spindle usually receives power from a driving source (such as a motor) of the machine tool and transmits the power to the electric spindle through a transmission device (such as gears, belts, or couplings, etc.), so that it rotates at a certain speed and torque.

[0004] However, currently, during the high-speed rotation of the machine tool electric spindle, the electric spindle will vibrate, generating a certain amount of noise. Moreover, the electric spindle components will generate heat during operation, which will cause the lubricating oil in the bearing group inside the electric spindle to evaporate. When the lubricating oil is insufficient or the lubrication method is inappropriate, it will lead to an increase in friction between the electric spindle components, thereby generating noise. Content of the Utility Model

[0005] Based on this, the purpose of the present utility model is to provide an electric spindle to solve the technical problems that currently, during the high-speed rotation of the machine tool electric spindle, the electric spindle will vibrate, generating a certain amount of noise, and the electric spindle components will generate heat during operation, which will cause the lubricating oil in the bearing group inside the electric spindle to evaporate. When the lubricating oil is insufficient or the lubrication method is inappropriate, it will lead to an increase in friction between the electric spindle components, thereby generating noise.

[0006] To achieve the above object, the present utility model provides the following technical solution: An electric spindle includes an electric spindle body. A plurality of bearing groups are arranged on the outer side of the electric spindle body. A bearing housing is arranged on the outer side of the plurality of bearing groups. Cavities are opened at both ends inside the bearing housing. A gas storage block is fixedly installed on one side of the bottom of the cavity. A second movable block is arranged inside the gas storage block. One side of the second movable block is fixedly connected to a movable rod. One end of the movable rod is fixedly connected to a blocking block. A liquid storage area is arranged inside the cavity. A first movable block is movably connected inside the liquid storage area. A liquid inlet for cooperating with the liquid storage area and an air inlet for cooperating with the gas storage block are respectively arranged on both sides of the bottom of the bearing housing. The gas storage block is filled with a gas that is easily expandable when heated. The liquid storage area is filled with lubricating oil. A slot is opened at the bottom of the bearing group. A plurality of drain ports for using the slot are opened inside the bearing housing. The blocking block is located below the drain port.

[0007] By adopting the above technical solution, during use, a gas that is prone to expansion when heated, such as oxygen, is filled into the air storage block through the air inlet. When the electric spindle works, the temperature inside the bearing housing will rise. When the oxygen in the air storage block expands due to heat, its volume increases, thereby pushing the second movable block to move leftward. When the second movable block moves leftward, it drives the movable rod and the plug block to move leftward synchronously, which is beneficial to opening the liquid discharge port. Lubricating oil is injected into the liquid storage area through the liquid inlet. When the liquid discharge port is opened, due to the pressure and gravity of the first movable block itself, the lubricating oil can be extruded, so that the lubricating oil in the liquid storage area is extruded through the liquid discharge port, and then through the slot at the bottom of the bearing group, the lubricating oil can enter the bearing group. During the movement of the electric spindle, the degree of expansion of the oxygen in the air storage block can change according to the heat generated during the rotation of the electric spindle. The higher the temperature, the faster the lubricating oil in the bearing group is consumed, the greater the expansion of the gas in the air storage block, the larger the size of the liquid discharge port, and the greater the oil discharge volume. On the contrary, when the temperature is lower, the expansion volume of oxygen is smaller, the size of the liquid discharge port is smaller, and the oil discharge volume is also smaller. When the liquid discharge port is located below the bearing housing, the consumption of lubricating oil can be reduced. With this structure, the practicability and flexibility of the entire electric spindle can be improved.

[0008] The present utility model is further configured such that one-way valve structures are provided in both the air inlet and the liquid inlet.

[0009] By adopting the above technical solution, when one-way valve structures are provided in both the air inlet and the liquid inlet, the sealing performance can be maintained during the injection of lubricating oil and gas, avoiding the problems of air leakage and oil leakage from the air inlet and the liquid inlet.

[0010] The present utility model is further configured such that a filling block is provided in the cavity. The cavity is of a circular structure. The filling block is located between the first movable block and the air storage block. The filling block is of a semi-circular structure and is made of a rubber structure.

[0011] By adopting the above technical solution, the filling block made of a rubber structure not only can maintain the stability of the bearing housing but also can achieve a sound-absorbing effect when the electric spindle works.

[0012] The present utility model is further configured such that the first movable block is made of steel and can move within the cavity.

[0013] By adopting the above technical solution, when the first movable block is made of steel, the liquid in the liquid storage area can be extruded. When the gas in the air storage block expands due to heat, the second movable block and the movable rod drive the plug block to move leftward, opening the liquid discharge port inside the bearing housing. The lubricating oil is extruded by the gravity of the first movable block itself, so that the lubricating oil can enter the bearing group through the slot at the bottom of the bearing group for use.

[0014] The present utility model is further configured such that a sheath is provided at one end outside the electric spindle body, an encoder pulley and a drive pulley are provided at the other end outside the electric spindle body, and the bearing housing is located between the sheath and the encoder pulley.

[0015] By adopting the above technical solution, the mutual cooperation among the provided sheath, the encoder pulley and the drive pulley is beneficial to the normal use of this electric spindle.

[0016] The present utility model is further configured such that the air storage block fits the cavity, an air storage area for cooperating with the second movable block is provided in the air storage block, the second movable block fits the inner wall of the air storage block, and the air inlet is located on the left side of the second movable block.

[0017] By adopting the above technical solution, when the provided air storage block fits the cavity, a certain sealing effect can be achieved to prevent the lubricating oil from flowing to the other side of the air storage block. Moreover, through the air storage area, the second movable block can move flexibly in the air storage block. When the air inlet is located on the left side of the second movable block, it is beneficial to fill the gas into the left side of the second movable block, and when the gas expands due to heat, it will push the second movable block to move to the right.

[0018] The present utility model is further configured such that the movable rod is of an arc-shaped structure, and an activity groove for cooperating with the movable rod is provided on the outside of the air storage block.

[0019] By adopting the above technical solution, when the provided movable rod is of an arc-shaped structure, it can cooperate with the activity groove to move flexibly in the bearing housing, and it is also beneficial to enable the plug block to always slide along the inner wall of the bearing housing.

[0020] In summary, the present utility model mainly has the following beneficial effects:

[0021] 1. The utility model fills a gas that is easy to expand when heated, such as oxygen, into the gas storage block through the air inlet. When the electric spindle works, the temperature in the bearing seat will rise. When the oxygen in the gas storage block expands due to heat, its volume increases, thus pushing the second movable block to move leftward. When the second movable block moves leftward, it drives the movable rod and the plug block to move leftward synchronously, which is conducive to opening the liquid discharge port. Lubricating oil is injected into the liquid storage area through the liquid inlet. When the liquid discharge port is opened, due to the pressure and gravity of the first movable block itself, the lubricating oil can be extruded, so that the lubricating oil in the liquid storage area is extruded through the liquid discharge port, and then through the slot at the bottom of the bearing group, the lubricating oil can enter the bearing group. During the movement of the electric spindle, the degree of expansion of the oxygen in the gas storage block can change according to the heat generated during the rotation of the electric spindle. When the temperature is higher, the lubricating oil in the bearing group is consumed faster, the gas in the gas storage block expands more, the size of the liquid discharge port is larger, and the oil discharge volume is also larger. On the contrary, when the temperature is lower, the expansion volume of oxygen is smaller, the size of the liquid discharge port is smaller, and the oil discharge volume is also smaller. When the liquid discharge port is located below the bearing seat, the consumption of lubricating oil can be reduced. With this structure, the practicability and flexibility of the entire electric spindle can be improved;

[0022] 2. When the first movable block provided by the utility model is made of steel, it can extrude the liquid in the liquid storage area. When the gas in the gas storage block expands due to heat, the second movable block and the movable rod drive the plug block to move leftward, opening the liquid discharge port inside the bearing seat. The lubricating oil is extruded by the gravity of the first movable block itself, so as to facilitate the extrusion of the lubricating oil. Through the slot at the bottom of the bearing group, it is conducive to the lubricating oil entering the bearing group for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 is a schematic diagram of the first perspective of the sectional structure of the utility model;

[0025] Figure 3 is a schematic diagram of the second perspective of the sectional structure of the utility model;

[0026] Figure 4 is a schematic diagram of the main structure of the utility model;

[0027] Figure 5 is a schematic diagram of the internal structure of the utility model.

[0028] In the figure: 1. Electric spindle body; 2. Bearing housing; 3. Air inlet; 4. Liquid inlet; 5. Bearing group; 6. Filling block; 7. First movable block; 8. Plug block; 9. Liquid storage area; 10. Groove; 11. Drain port; 12. Movable rod; 13. Second movable block; 14. Air storage area; 15. Encoder pulley; 16. Driving pulley; 17. Movable groove; 18. Air storage block; 19. Sheath. Detailed implementation mode

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention.

[0030] Next, the embodiments of the present invention will be described according to the overall structure of the present invention.

[0031] An electric spindle, as Figures 1-5 shown, includes an electric spindle body 1. Multiple groups of bearing groups 5 are arranged outside the electric spindle body 1. Multiple groups of bearing seats 2 are arranged outside the multiple groups of bearing groups 5. Cavities are opened at both ends inside the bearing seat 2. An air storage block 18 is fixedly installed on one side of the bottom of the cavity. A second movable block 13 is arranged inside the air storage block 18. A movable rod 12 is fixedly connected to one side of the second movable block 13. A plug block 8 is fixedly connected to one end of the movable rod 12. A liquid storage area 9 is arranged inside the cavity. A first movable block 7 is movably connected inside the liquid storage area 9. A liquid inlet 4 for cooperating with the liquid storage area 9 and an air inlet 3 for cooperating with the air storage block 18 are respectively arranged on both sides of the bottom of the bearing seat 2. The air storage block 18 is filled with a gas that is easy to expand when heated. The liquid storage area 9 is filled with lubricating oil. Grooves 10 are opened at the bottom of the bearing group 5. Drain ports 11 for using the multiple groups of grooves 10 are opened inside the bearing seat 2. The plug block 8 is located below the drain port 11.

[0032] During use, heat-expandable gas, such as oxygen, is filled into the gas storage block 18 through the air inlet 3. When the main electric spindle body 1 operates, the temperature inside the bearing housing 2 will rise. When the oxygen in the gas storage block 18 expands due to heat, its volume increases, thereby pushing the second movable block 13 to move leftward. When the second movable block 13 moves leftward, it drives the movable rod 12 and the plug 8 to move leftward synchronously, which is conducive to opening the liquid discharge port 11. Lubricating oil is injected into the liquid storage area 9 through the liquid inlet 4. When the liquid discharge port 11 is opened, due to the pressure and gravity of the first movable block 7 itself, the lubricating oil can be extruded, so that the lubricating oil in the liquid storage area 9 is extruded through the liquid discharge port 11, and then through the slot 10 at the bottom of the bearing set 5, the lubricating oil can enter the bearing set 5. During the movement of the main electric spindle body 1, the degree of expansion of the oxygen in the gas storage block 18 can change according to the heat generated during the rotation of the main electric spindle body 1. The higher the temperature, the faster the lubricating oil in the bearing set 5 is consumed, the greater the expansion of the gas in the gas storage block 18, the larger the size of the liquid discharge port 11, and the greater the oil discharge volume. On the contrary, when the temperature is lower, the expansion volume of oxygen is smaller, the size of the liquid discharge port 11 is smaller, and the oil discharge volume is also smaller. When the liquid discharge port 11 is located below the bearing housing 2, the consumption of lubricating oil can be reduced. With this structure, the practicability and flexibility of the entire main electric spindle can be improved.

[0033] Furthermore, when one-way valve structures are provided in both the air inlet 3 and the liquid inlet 4, the sealing performance can be maintained during the injection of lubricating oil and gas, avoiding the problems of air leakage and oil leakage from the air inlet 3 and the liquid inlet 4. The filling block 6 is made of rubber structure, which can not only maintain the stability of the bearing housing 2 but also achieve a noise reduction effect when the main electric spindle body 1 operates. When the first movable block 7 is made of steel, it can extrude the liquid in the liquid storage area 9. When the gas in the gas storage block 18 expands due to heat, the second movable block 13 and the movable rod 12 drive the plug 8 to move leftward, opening the liquid discharge port 11 inside the bearing housing 2. The lubricating oil is extruded by the gravity of the first movable block 7 itself, so as to facilitate the extrusion of the lubricating oil. Through the slot 10 at the bottom of the bearing set 5, it is conducive to the lubricating oil entering the bearing set 5 for use.

[0034] In this embodiment, the mutual cooperation among the sheath 19, the encoder pulley 15, and the drive pulley 16 is conducive to the normal operation of the main electric spindle body 1. When the gas storage block 18 fits the cavity, a certain sealing effect can be achieved, avoiding the lubricating oil flowing to the other side of the gas storage block 18. And through the gas storage area 14, the second movable block 13 can move flexibly inside the gas storage block 18. When the air inlet 3 is located on the left side of the second movable block 13, it is conducive to filling the gas into the left side of the second movable block 13. When the gas expands due to heat, it will push the second movable block 13 to move rightward. Finally, when the movable rod 12 is of an arc structure, it can cooperate with the movable slot 17 to move flexibly inside the bearing housing 2, and it is also conducive to the plug 8 always sliding along the inner wall of the bearing housing 2.

[0035] Although embodiments of the present utility model have been shown and described, the specific embodiments are merely explanations of the present utility model and not limitations thereof. The specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions, and variations that do not make a creative contribution to the embodiments as needed, but as long as they are within the scope of the claims of the present utility model, they are protected by the patent law.

Claims

1. An electric spindle, comprising an electric spindle body (1), characterized in that: On the outer side of the main body of the electric spindle (1), multiple sets of bearing groups (5) are arranged. On the outer side of the multiple sets of bearing groups (5), a bearing housing (2) is arranged. At both ends inside the bearing housing (2), cavities are opened. On one side of the bottom of the cavity, an air storage block (18) is fixedly installed. Inside the air storage block (18), a second movable block (13) is arranged. On one side of the second movable block (13), a movable rod (12) is fixedly connected. At one end of the movable rod (12), a blocking block (8) is fixedly connected. Inside the cavity, a liquid storage area (9) is arranged. Inside the liquid storage area (9), a first movable block (7) is movably connected. On both sides of the bottom of the bearing housing (2), a liquid inlet (4) used in cooperation with the liquid storage area (9) and an air inlet (3) used in cooperation with the air storage block (18) are respectively arranged. The air storage block (18) is filled with a gas that is easy to expand when heated. The liquid storage area (9) is filled with lubricating oil. At the bottom of the bearing group (5), a slot (10) is opened. Inside the bearing housing (2), multiple drain ports (11) used in cooperation with the slot (10) are opened. The blocking block (8) is located below the drain port (11).

2. The electric spindle according to claim 1, characterized in that: A one-way valve structure is arranged inside both the air inlet (3) and the liquid inlet (4).

3. The electric spindle according to claim 1, characterized in that: Inside the cavity, a filling block (6) is arranged. The cavity is of a circular structure. The filling block (6) is located between the first movable block (7) and the air storage block (18). The filling block (6) is of a semi-circular structure and is made of a rubber structure.

4. The motorized spindle according to claim 1, characterized in that: The first movable block (7) is made of steel and can move inside the cavity.

5. The motorized spindle according to claim 1, characterized in that: At one end on the outer side of the main body of the electric spindle (1), a sheath (19) is arranged. At the other end on the outer side of the main body of the electric spindle (1), an encoder pulley (15) and a drive pulley (16) are arranged. The bearing housing (2) is located between the sheath (19) and the encoder pulley (15).

6. The motorized spindle according to claim 1, characterized in that: The air storage block (18) fits the cavity. Inside the air storage block (18), an air storage area (14) used in cooperation with the second movable block (13) is opened. The second movable block (13) fits the inner wall of the air storage block (18). The air inlet (3) is located on the left side of the second movable block (13).

7. The electric spindle according to claim 1, characterized in that: The movable rod (12) is of an arc structure, and an activity slot (17) used in cooperation with the movable rod (12) is opened on the outer side of the air storage block (18).

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