Floating electric spindle

Abstract

The utility model relates to the technical field of motorized spindles, in particular to a floating motorized spindle which comprises a spindle, a connecting flange, a limiting ring, a floating ring and a wear-resistant ring are sequentially sleeved outside the spindle from bottom to top, the connecting flange is fixedly connected with the spindle, the limiting ring is fixed on the connecting flange, and the floating ring is fixed on the limiting ring. A plurality of floating heads are arranged on the outer side wall of the floating ring, a floating outer ring sleeves the floating ring, a plurality of floating grooves are formed in the inner side wall of the floating outer ring, the floating heads are slidably connected into the floating grooves, a cylinder shell is fixed to one end of the floating outer ring, a plurality of pistons are slidably arranged in the cylinder shell, and one ends of the pistons penetrate through the wear-resistant ring to abut against the floating ring. According to the electric spindle floating mechanism, floating of the electric spindle is achieved, the situation that the electric spindle is damaged due to the fact that the electric spindle bears too large rigid force in the rotating process is avoided, and the electric spindle floating mechanism has wide application prospects in the technical field of electric spindles.

Description

Technical Field

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

[0002] In the prior art, there are always burrs on the edge of a metal workpiece after integrated die-casting molding, and a grinding tool connected to an electric spindle needs to be used for grinding. In order to improve work efficiency and ensure safety, an industrial robot is usually used to connect the grinding tool to cut and grind the burrs of the workpiece. However, in the prior art, the robot is usually directly connected to the electric spindle. During the grinding process, the electric spindle does not have floating property, and the rigid force between the electric spindle and the grinding head and the workpiece during the grinding process is too large, which is extremely easy to cause damage to the electric spindle or the grinding head, and the electric spindle or the grinding head needs to be frequently replaced, affecting the subsequent grinding efficiency. Therefore, a floating spindle is needed to solve the above problems. Summary of the Utility Model

[0003] To solve the problems in the prior art that in the prior art, the robot is usually directly connected to the electric spindle. During the grinding process, the electric spindle does not have floating property, and the rigid force between the electric spindle and the grinding head and the workpiece during the grinding process is too large, which is extremely easy to cause damage to the electric spindle or the grinding head, and the electric spindle or the grinding head needs to be frequently replaced, affecting the subsequent grinding efficiency, a floating electric spindle is invented.

[0004] The technical solution of the utility model is as follows: it includes a spindle. Among them, a connection flange, a limit ring, a floating ring and a wear-resistant ring are sequentially sleeved on the spindle from bottom to top. The connection flange is fixedly connected to the spindle. The limit ring is fixed on the connection flange. The floating ring is fixed on the limit ring. A plurality of floating heads are arranged on the outer side wall of the floating ring. A floating outer ring is sleeved outside the floating ring. A plurality of floating grooves are formed on the inner side wall of the floating outer ring. The floating heads are slidably connected in the floating grooves. One end of the floating outer ring is fixed with a cylinder housing. A plurality of pistons are slidably arranged in the cylinder housing. One end of the piston penetrates through the wear-resistant ring and abuts against the floating ring. The end of the piston abutting against the floating ring is semi-spherical. The wear-resistant ring is arranged in the cylinder housing and fixedly connected to the cylinder housing. The cylinder housing is fixed with a cylinder cover plate. An air supply port communicating with the inside of the cylinder housing is formed on the cylinder end cover.

[0005] Preferably, the spindle is composed of a drive motor assembly and a rotor assembly. A non-circular insertion groove is formed at one end of the drive motor assembly. The rotor assembly extends with a non-circular insertion head. The insertion head is inserted into the insertion groove. The drive motor assembly and the rotor assembly are integrally encapsulated by a spindle housing.

[0006] Preferably, a plurality of interconnected cylinders are provided in the cylinder housing. The piston has a T-shaped vertical cross-section. The larger-diameter end of the piston is slidably connected in the cylinder. A clamping groove is provided on the outer end face of the end of the piston inside the cylinder, and a sealing ring is clamped in the clamping groove.

[0007] Preferably, the air supply port is connected to one of the cylinders. A sealing gasket is provided between the cylinder cover plate at the air supply port and the cylinder housing. A plurality of vent holes are provided in the cylinder housing to communicate the cavity between the cylinder housing and the main shaft.

[0008] Preferably, a lower protective flange is fixed to one end of the floating outer ring, and an upper protective flange is fixed to the cylinder cover plate. Upper and lower clamping grooves are respectively provided on the upper and lower protective flanges. Upper and lower protective rubbers are respectively fixed near the upper and lower clamping grooves. The upper and lower protective rubbers are in close contact with the outer surface of the motorized spindle. A plurality of exhaust holes are provided in the lower protective rubber.

[0009] The technical solution of the present utility model can achieve the following beneficial effects: (1) The main shaft composed of a driving motor assembly and a rotor assembly connected by plug-in connection is convenient for the replacement and maintenance of the main shaft; (2) Through the floating ring, the floating outer ring and the floating head, the main shaft has the ability of floating deflection during the grinding process, reducing the rigid force between the main shaft and the connected grinding head and the workpiece, and avoiding damage to the main shaft and the grinding head due to excessive rigid force; (3) Through the cylinder, the piston and the wear-resistant ring, it is convenient to limit the deflection of the main shaft, avoiding damage caused by excessive deflection of the main shaft, and being able to return to the original position when the main shaft is not affected by external forces, facilitating subsequent grinding; (4) Through the upper protective flange, the lower protective flange, the upper protective rubber and the lower protective rubber, it is convenient to protect and block both ends of the motorized spindle, preventing foreign matters such as external dust and debris from entering the floating outer ring and the cylinder housing through the main shaft and affecting the normal operation of other components in the floating outer ring and the cylinder housing; (5) Through the vent holes and the exhaust holes, it is convenient to communicate the inside of the cylinder housing with the outside, ensuring the air pressure balance inside and outside the space between the cylinder housing and the main shaft when the piston moves, and avoiding affecting the movement of the piston in the cylinder housing; The technical solution of the present utility model has a wide application prospect in the technical field of motorized spindles. Description of the Drawings

[0010] Figure 1 It is the front view of a floating motorized spindle of the present utility model.

[0011] Figure 2 is Figure 1 the sectional view taken along the line A-A in

[0012] Figure 3 It is the structural schematic diagram of the floating part of a floating motorized spindle of the present utility model.

[0013] Among them, 1. driving motor assembly, 2. rotor assembly, 3. plugging groove, 4. plug connector, 5. connecting flange, 6. limiting ring, 7. floating ring, 8. wear-resistant ring, 9. fixing groove, 10. floating head, 11. floating outer ring, 12. floating groove, 13. cylinder housing, 14. cylinder, 15. piston, 16. clamping groove, 17. sealing ring, 18. spring, 19. cylinder cover plate, 20. air supply port, 21. lower protection flange, 22. lower protection rubber, 23. upper protection flange, 24. upper protection rubber, 25. ventilation hole, 26. exhaust hole. Specific implementation manners

[0014] The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope protected by the present utility model. In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model 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 thus cannot be understood as a limitation to the present utility model.

[0015] In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" 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 mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0016] Such as Figures 1-3A floating electric spindle as shown includes a main spindle, which is composed of a drive motor assembly 1 and a rotor assembly 2. One end of the drive motor assembly 1 is provided with a non-circular insertion slot 3, and the rotor assembly 2 extends with a non-circular plug 4. The plug 4 is inserted into the insertion slot 3, facilitating the detachable connection of the drive motor assembly 1 and the rotor assembly 2 through the non-circular plug 4 and insertion slot 3, and facilitating the replacement and maintenance of the drive motor assembly 1 and the rotor assembly 2. The drive motor assembly 1 and the rotor assembly 2 are integrally encapsulated by a main spindle housing, facilitating the assembly of the entire main spindle and facilitating subsequent maintenance. A connection flange 5, a limit ring 6, a floating ring 7, and a wear-resistant ring 8 are sequentially sleeved on the main spindle from bottom to top. The connection flange 5 is welded to the main spindle housing of the main spindle or detachably fixed by bolts, so that the connection flange 5 and the main spindle are connected together to form a whole. The limit ring 6 is detachably fixed to the connection flange 5 by bolts, so that the limit ring 6 is connected to the connection flange 5 and then connected to the main spindle to form a whole. The floating ring 7 is detachably fixed to the limit ring 6 by bolts, so that the floating ring 7 is connected to the limit ring 6 and then connected to the main spindle to form a whole.

[0017] As Figures 1-3 In a floating electric spindle as shown, a plurality of floating heads 10 are provided on the outer side wall of the floating ring 7. Specifically, a plurality of fixing grooves 9 that are annular and evenly arranged are formed on the outer side wall of the floating ring 7. One end of the floating head 10 is inserted into the fixing groove 9, facilitating the connection of the floating head 10 to the floating ring 7 and facilitating the maintenance and replacement of the floating head 10. A floating outer ring 11 is sleeved outside the floating ring 7. A plurality of floating grooves 12 are formed on the inner side wall of the floating outer ring 11. The floating head 10 is slidably connected in the floating groove 12, and one end of the floating head 10 outside the fixing groove 9 is hemispherical, facilitating the relative movement of the floating ring 7 and the floating outer ring 11 through the sliding of the floating head 10 in the floating groove 12, thereby realizing the deflection of the main spindle relative to the floating outer ring 11, reducing the rigid force received by the main spindle during operation, and using the floating head 10 and the floating groove 12 to limit the deflection of the main spindle. At the same time, the hemispherical floating head 10 can reduce the friction between the rotating shaft and the floating outer ring 11 to a certain extent when the rotating shaft deflects.

[0018] As Figures 1-3A floating electric spindle is shown. One end of the floating outer ring 11 is detachably fixed with a cylinder housing 13 through bolts. The cylinder housing 13 is connected to the floating outer ring 11, so that the spindle can float and deflect relative to the cylinder housing 13. A number of interconnected cylinders 14 are provided in the cylinder housing 13. A piston 15 is slidably arranged in the cylinder 14, and one end of the piston 15 penetrates through the wear-resistant ring 8 and abuts against the floating ring 7, facilitating buffering the deflection of the spindle by the sliding of the piston 15 in the cylinder 14 and avoiding damage caused by excessive deflection of the spindle relative to the floating outer ring 11 and the cylinder housing 13. The wear-resistant ring 8 is arranged in the cylinder housing 13 and is detachably and fixedly connected to the cylinder housing 13 through bolts, so that the wear-resistant ring 8 is connected to the cylinder housing 13, facilitating limiting the movement of the piston 15 by the wear-resistant ring 8, reducing the wear resistance between the cylinder housing 13 and the floating ring 7 during the deflection of the spindle, and limiting the deflection of the spindle by the wear-resistant ring 8. The end of the piston 15 abutting against the floating ring 7 is hemispherical, so that the frictional force between the piston 15 and the floating ring 7 is reduced to a certain extent by using the hemispherical end of the piston 15, facilitating the floating deflection of the floating ring 7 relative to the cylinder housing 13 and the floating outer ring 11 driven by the spindle. The vertical cross-section of the piston 15 is T-shaped, and the larger-diameter end of the piston 15 is slidably connected in the cylinder 14, facilitating the sliding of the piston 15 in the cylinder 14. A clamping groove 16 is provided on the outer end face of one end of the piston 15 in the cylinder 14, and a sealing ring 17 is clamped in the clamping groove 16, so that the sealing ring 17 is clamped and limited by the clamping groove 16, preventing the sealing ring 17 from detaching from the outer end face of the piston 15, and then sealing the gap between the side end face of the piston 15 and the inner wall of the cylinder 14 by the sealing ring 17, forming an independent cavity inside the cylinder 14 above the piston 15, so that the principle of compressed air is formed when the piston 15 moves upward in the cylinder 14, thereby slowing down the deflection force of the spindle. A spring 18 is provided in the cylinder 14, facilitating providing elastic force for the piston 15 by the spring 18, slowing down the moving speed of the piston 15 compressing air in the cylinder 14, and facilitating accelerating the reset of the piston 15 when the spindle is not affected by external forces. The cylinder housing 13 is detachably fixed with a cylinder cover plate 19 through bolts. The cylinder cover plate 19 is connected to the cylinder housing 13 to form a whole, and then the entire electric spindle is connected to the robotic arm through the cylinder cover plate 19, realizing controlling the movement of the electric spindle through the robotic arm. An air supply port 20 communicating with the inside of the cylinder housing 13 is provided on the end cover of the cylinder 14, that is, the air supply port 20 is communicated with one of the cylinders 14, facilitating supplying air into the cylinder 14 through the air supply port 20, realizing the quick reset of the spindle after blocking and deflection, and simultaneously using the interconnected cylinders 14 to supply air to multiple cylinders 14 through one air supply port 20 at the same time.A sealing washer is provided between the cylinder cover plate 19 at the air supply port 20 and the cylinder housing 13, facilitating the sealing of the gap between the cylinder cover plate 19 and the cylinder housing 13 at the air supply port 20 through the sealing washer to prevent air leakage from the gap between the cylinder cover plate 19 and the cylinder housing 13. A number of vent holes 25 are provided on the cylinder housing 13 to communicate the cavity between the cylinder housing 13 and the main shaft, facilitating the maintenance of the internal and external air pressures in the cavity between the cylinder housing 13 and the main shaft through the vent holes 25 and preventing the sliding of the piston 15 in the cylinder 14 from being affected.

[0019] As Figures 1-3 shown, in a floating electric spindle, a lower protective flange 21 is detachably fixed to one end of the floating outer ring 11 by bolts, enabling the lower protective flange 21 and the floating outer ring 11 to be connected together as a whole. The cylinder cover plate 19 is detachably fixed to an upper protective flange 23 by bolts, enabling the upper protective flange 23 and the cylinder cover plate 19 to be connected together as a whole. An upper protective rubber 24 and a lower protective rubber 22 are respectively snap-fixed on the upper protective flange 23 and the lower protective flange 21. Specifically, upper and lower card slots are respectively provided on the upper protective flange 23 and the lower protective flange 21, and one ends of the upper protective rubber 24 and the lower protective rubber 22 are respectively snap-fixed in the upper and lower card slots. The upper protective rubber 24 and the lower protective rubber 22 are in close contact with the outer surface of the main shaft, facilitating the snap-limitation of the upper protective rubber 24 and the lower protective rubber 22 through the upper and lower card slots respectively to prevent the upper protective rubber 24 and the lower protective rubber 22 from detaching from the upper protective flange 23 and the lower protective flange 21 respectively. Furthermore, the upper protective rubber 24 and the lower protective rubber 22 are respectively used to protect and block the two ends of the main shaft to prevent foreign matters such as external dust and debris from entering the floating outer ring 11 and the cylinder housing 13 from the upper and lower ends, affecting the floating offset of the main shaft relative to the floating outer ring 11 and the cylinder housing 13. A number of exhaust holes 26 are provided on the lower protective rubber 22, and the exhaust holes 26 communicate with the ventilation grooves provided on the lower protective flange 21, enabling the cavity between the upper protective rubber 24 and the lower protective rubber 22 to communicate with the outside through the exhaust holes 26, ensuring the air pressure balance between the cavity between the upper protective rubber 24 and the lower protective rubber 22 and the outside, and facilitating the floating deflection of the main shaft in the cavity between the upper protective rubber 24 and the lower protective rubber 22.

[0020] In the above embodiments, the equipment components involved are all conventional equipment components without special instructions. The structural setting methods, working methods, or control methods involved are all conventional setting methods, working methods, or control methods in this field without special instructions.

[0021] The above-described embodiments merely represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A floating electric spindle, comprising a spindle, characterized in that: The main shaft is provided with a connecting flange (5), a limiting ring (6), a floating ring (7) and a wear-resistant ring (8) in sequence from bottom to top. The connecting flange (5) is fixedly connected to the main shaft. The limiting ring (6) is fixed on the connecting flange (5). The floating ring (7) is fixed on the limiting ring (6). The outer wall of the floating ring (7) is provided with a plurality of floating heads (10). The outer sleeve of the floating ring (7) is provided with a floating outer ring (11). The inner wall of the floating outer ring (11) is provided with a plurality of floating grooves (12). The floating head (10) is slidably connected in the floating groove (12). One end of the floating outer ring (11) is fixed with a cylinder housing (1 3), a plurality of interconnected cylinders (14) are provided in the cylinder housing (13), a piston (15) is slidably arranged in the cylinder (14), one end of the piston (15) penetrates the wear-resistant ring (8) and contacts the floating ring (7), the end of the piston (15) contacting the floating ring (7) is semi-spherical, a spring (18) is provided in the cylinder (14), the wear-resistant ring (8) is in the cylinder housing (13) and is fixedly connected to the cylinder housing (13), a cylinder cover plate (19) is fixed to the cylinder housing (13), and an air supply port (20) communicating with the interior of the cylinder housing (13) is provided on the end cover of the cylinder (14).

2. A floating electric spindle according to claim 1, characterized in that: The main shaft is composed of a drive motor assembly (1) and a rotor assembly (2); a non-circular plug-in slot (3) is provided at one end of the drive motor assembly (1); a non-circular plug-in connector (4) extends from the rotor assembly (2); the plug-in connector (4) is plugged into the plug-in slot (3); and the drive motor assembly (1) and the rotor assembly (2) are integrally packaged and formed by a main shaft housing.

3. The floating electric spindle according to claim 1, characterized in that: The outer wall of the floating ring (7) is provided with a plurality of evenly arranged annular fixing grooves (9), one end of the floating head (10) is inserted into the fixing groove (9), and the end of the floating head (10) outside the fixing groove (9) is semi-spherical.

4. The floating electric spindle according to claim 1, characterized in that: The piston (15) has a T-shaped vertical cross section. The end of the piston (15) with a larger diameter is slidably connected in the cylinder (14). A clamping groove (16) is provided on the outer end surface of one end of the piston (15) in the cylinder (14). A sealing ring (17) is clamped in the clamping groove (16).

5. The floating electric spindle according to claim 1, characterized in that: The air supply port (20) is connected to one of the cylinders (14), a sealing gasket is provided between the cylinder cover plate (19) at the air supply port (20) and the cylinder housing (13), and a plurality of air vents (25) are provided on the cylinder housing (13) that are connected to the cavity between the cylinder housing (13) and the main shaft.

6. The floating electric spindle according to claim 1, characterized in that: A lower protective flange (21) is fixed to one end of the floating outer ring (11), an upper protective flange (23) is fixed to the cylinder cover plate (19), an upper clamping groove (23) and a lower clamping groove are respectively provided on the upper protective flange (23) and the lower protective flange (21), an upper protective rubber (24) and a lower protective rubber (22) are respectively fixed in the upper clamping groove and the lower clamping groove, the upper protective rubber (24) and the lower protective rubber (22) are tightly fitted to the outer surface of the electric spindle, and a plurality of exhaust holes (26) are provided on the lower protective rubber (22).

Images