Built-in multi-stage cylinder pressurization tool changing electric spindle

Abstract

The utility model discloses a built -in multistage air cylinder pressure exchange tool electric main shaft, apply in lathe field, including aluminium jacket, the inside installation of aluminium jacket has four cylinder bodies, and four cylinder bodies are fixedly connected through bolt between, the surface intercommunication of bottom cylinder body has the gas pipe joint, the inside installation of cylinder body has the piston, the inside setting of top piston has the air -guide screw, top the surface mounting of piston has the broach seat, the utility model discloses through the air cylinder pull rod and make the claw will fix the cutter, after moving in place, the broach plate will hold up the pull rod, the fixed mode of it, can reach the purpose of bearing protection, improved the service life of the axle, the utility model discloses through setting multistage air cylinder and fixing the cutter, increased the tension of air cylinder, improved the stability of cutter greatly, compared with traditional hydraulic tool changing, the speed is faster, and aluminium jacket and air cylinder integrated design, the volume is smaller.

Description

Technical Field

[0001] This utility model relates to the field of machine tools, and in particular to an electric spindle with built-in multi-stage cylinder booster for tool changing. Background Technology

[0002] An electric spindle is a new technology in the field of CNC machine tools that integrates the machine tool spindle and spindle motor into one unit. The spindle is a complete assembly, including the electric spindle itself and its accessories: the electric spindle, high-frequency inverter, oil mist lubricator, cooling system, built-in encoder, tool changer, etc. This transmission structure, where the spindle motor and machine tool spindle are integrated, makes the spindle component relatively independent from the machine tool's transmission system and overall structure. Therefore, it can be made into a spindle unit, commonly known as an electric spindle, characterized by high speed, high precision, and low noise.

[0003] A search of Chinese patents revealed publication number CN217315901U, which discloses a water-cooled automatic tool changer spindle. The spindle comprises a housing, a core, a rotor, a stator, and a tool changer assembly. The housing has shaft holes at both ends and cavities communicating with these holes for mounting the stator and rotor. The core passes through the shaft holes and is housed within the housing. A detachable tool changer assembly is located at the front end of the core. The core is connected to the housing via a front bearing and a rear bearing. The core is fixedly fitted inside the rotor, which is rotatably fitted inside the stator. The stator is fixed within the housing. The front bearing consists of a first bearing and a second bearing, with a first spacer between them. The first spacer has heat dissipation holes parallel to the core. This water-cooled automatic tool changer spindle effectively reduces heat dissipation during use by cooling the stator and bearings, thus increasing the spindle's lifespan.

[0004] Existing electric spindles cannot protect the bearings. When changing tools, the cylinder pulls the pallet, and excessive pulling force can affect the stability of the bearings, easily causing bearing damage and reducing their service life. To solve the above problems, we propose an electric spindle with built-in multi-stage cylinder booster for tool changing. Utility Model Content

[0005] The purpose of this invention is to provide an electric spindle with built-in multi-stage cylinder booster for tool changing, which has the advantage of protecting the bearings.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a multi-stage cylinder booster electric spindle, comprising an aluminum water jacket, four cylinders installed inside the aluminum water jacket and fixedly connected to each other by bolts, an air pipe connector connected to the surface of the bottom cylinder, a piston installed inside the cylinder, an air guide screw provided inside the top piston, a broach seat installed on the surface of the top piston, an upper bearing seat installed on the surface of the aluminum water jacket, a mounting seat installed inside the upper bearing seat, an encoder installed on the surface of the mounting seat, a broach plate installed inside the mounting seat, a shaft installed on the surface of the encoder and rotatably sleeved with the housing, a pull rod installed inside the shaft, one end of the pull rod located inside the broach seat, a disc spring installed between the pull rod and the shaft, a rotor installed on the surface of the shaft, a housing installed on the surface of the upper bearing seat, a stator installed inside the housing, and a pull claw installed at one end of the pull rod, the pull claw located inside the shaft.

[0007] By adopting the above technical solution, the pull rod is pulled by the cylinder to fix the cutter with the puller. After the pull rod moves into place, the cutter plate will lock the pull rod and fix it. This method can achieve the purpose of protecting the bearing and improve the service life of the spindle. By setting up a multi-stage cylinder to fix the cutter, the pulling force of the cylinder is increased, which greatly improves the stability of the cutter. Compared with the traditional hydraulic tool changer, the speed is faster. The aluminum water jacket and cylinder are integrated into one design, making the size smaller.

[0008] The present invention is further configured such that: a spring cover plate is installed on the surface of the aluminum water jacket, and the air pipe connector is located inside the spring cover plate.

[0009] The above technical solution uses a spring cover plate to fix the cylinder.

[0010] The present invention is further configured such that multiple power connectors are installed on the surface of the aluminum water jacket.

[0011] By adopting the above technical solution, a power connector is provided for easy power connection.

[0012] The present invention is further configured such that a sealing ring is provided between the piston and the cylinder.

[0013] By adopting the above technical solution and setting a sealing ring, the sealing performance is improved and air leakage is prevented.

[0014] The present invention is further configured such that a support plate is mounted on the surface of the upper bearing seat, and the axis is located inside the support plate.

[0015] By adopting the above technical solution, the stability of the shaft is improved by setting up a support plate to support the shaft.

[0016] The present invention is further configured such that a sliding sleeve is installed between the disc springs.

[0017] By adopting the above technical solution and setting up a sliding sleeve, the stability of the disc spring is ensured.

[0018] The present invention is further configured such that a lower cover is installed at one end of the housing.

[0019] By adopting the above technical solution, the internal structure of the casing is protected by a lower cover, which facilitates maintenance.

[0020] The present invention is further configured such that a fixing plate is installed on the surface of the housing.

[0021] The above technical solution facilitates installation and fixation by setting up a fixing plate.

[0022] In summary, this utility model has the following beneficial effects: 1. This utility model uses a cylinder to pull a pull rod to fix the cutter with a pull claw. After the pull rod moves into place, the cutter plate will lock the pull rod in place. This method of fixing the rod can protect the bearing and improve the service life of the shaft. 2. This utility model uses multi-stage cylinders to fix the tool, which increases the pulling force of the cylinders and greatly improves the stability of the tool. Compared with traditional hydraulic tool changing, it is faster. The aluminum water jacket and cylinder are integrated into one design, making it smaller in size. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural view of the present invention; Figure 2 This is a cross-sectional view of the structure of this utility model; Figure 3 This is a utility model Figure 2 Enlarged view of the structure at point A in the middle.

[0024] Reference numerals in the attached diagram: 1. Aluminum water jacket; 2. Cylinder body; 3. Air pipe connector; 4. Piston; 5. Air guide screw; 6. Broach holder; 7. Upper bearing seat; 8. Mounting seat; 9. Encoder; 10. Broach plate; 11. Shaft; 12. Tie rod; 13. Butterfly spring; 14. Rotor; 15. Housing; 16. Stator; 17. Claw; 18. Spring cover plate; 19. Power connector; 20. Sealing ring; 21. Support plate; 22. Sliding sleeve; 23. Lower cover; 24. Fixing plate. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Example: refer to Figure 1 , Figure 2 and Figure 3 A multi-stage cylinder-driven pressure-boosting electric spindle includes an aluminum water jacket 1. Four cylinders 2 are installed inside the aluminum water jacket 1 and are bolted together. An air pipe connector 3 connects to the surface of the bottom cylinder 2. A piston 4 is installed inside the cylinder 2. An air guide screw 5 is installed inside the top piston 4. A broach holder 6 is installed on the surface of the top piston 4. An upper bearing seat 7 is installed on the surface of the aluminum water jacket 1. A mounting seat 8 is installed inside the upper bearing seat 7. An encoder 9 is installed on the surface of the mounting seat 8. A broach plate 10 is installed inside the mounting seat 8. A shaft 11 is installed on the surface of the encoder 9 and is rotatably sleeved with a housing 15. A pull rod 12 is installed inside the shaft 11, with one end of the pull rod 12 located inside the broach holder 6. A butterfly spring 13 is installed between the rod 12 and the shaft 11. A rotor 14 is installed on the surface of the shaft 11. A housing 15 is installed on the surface of the upper bearing seat 7. A stator 16 is installed inside the housing 15. A pull claw 17 is installed at one end of the pull rod 12, and the pull claw 17 is located inside the shaft 11. The pull rod 12 is pulled by the cylinder to fix the tool with the pull claw 17. After the pull rod 12 moves into place, the pull plate 10 will lock the pull rod 12. This fixing method can achieve the purpose of protecting the bearing and improve the service life of the shaft 11. By setting a multi-stage cylinder to fix the tool, the pulling force of the cylinder is increased, which greatly improves the stability of the tool. Compared with the traditional hydraulic tool change, the speed is faster. The aluminum water jacket 1 is integrated with the cylinder, making it smaller in size.

[0027] refer to Figure 2 A spring cover plate 18 is installed on the surface of the aluminum water jacket 1, and the air pipe connector 3 is located inside the spring cover plate 18. The cylinder is fixed by setting the spring cover plate 18.

[0028] refer to Figure 2 The surface of the aluminum water jacket 1 is equipped with multiple power connectors 19, which facilitates power connection.

[0029] refer to Figure 2 A sealing ring 20 is provided between the piston 4 and the cylinder 2. By providing the sealing ring 20, the sealing performance is improved and air leakage is prevented.

[0030] refer to Figure 2 A support plate 21 is installed on the surface of the upper bearing housing 7, and the shaft 11 is located inside the support plate 21. By setting the support plate 21, the shaft 11 is supported, thereby improving the stability of the shaft 11.

[0031] refer to Figure 2 A sliding sleeve 22 is installed between the disc springs 13 to ensure the stability of the disc springs 13.

[0032] refer to Figure 1 and Figure 2A lower cover 23 is installed at one end of the housing 15. The lower cover 23 protects the internal structure of the housing 15 and facilitates maintenance.

[0033] refer to Figure 1 and Figure 2 A fixing plate 24 is installed on the surface of the housing 15, which facilitates installation and fixation.

[0034] Brief description of the usage process: Connect the air supply pipe to the air pipe connector 3 to supply air. The piston 4 moves under the action of air pressure. The movement of the piston 4 will push the pull seat to move. The movement of the cutter holder 6 will cause the pull rod 12 to move. The movement of the pull rod 12 will drive the pull claw 17 to move, so that the pull claw 17 will loosen and clamp the cutter. During installation, the cutter is placed in the shaft 11. The piston 4 moves in the opposite direction to drive the pull rod 12 to fix the pull claw 17 to fix the cutter, thus completing the cutter change. When the pull rod 12 is tightened, the cutter plate 10 will lock the pull rod 12 to fix it and prevent damage to the bearing, thereby achieving the purpose of protecting the shaft 11. By setting up a multi-stage cylinder to fix the cutter, the cylinder pulling force is increased, which greatly improves the stability of the cutter. Compared with the traditional hydraulic cutter change, the speed is faster. The aluminum water jacket 1 and the cylinder are integrated into one design, making the size smaller.

[0035] It should be noted that parts have a lifespan and can be replaced during regular maintenance when they no longer meet performance requirements. Deterioration in performance due to prolonged use of parts is not a design defect of this application.

[0036] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A built-in multi-stage cylinder booster tool changer electric spindle, comprising an aluminum water jacket (1), characterized in that, The aluminum water jacket (1) has four cylinders (2) installed inside, and the four cylinders (2) are fixedly connected by bolts. The surface of the bottom cylinder (2) is connected to an air pipe connector (3). The cylinder (2) has a piston (4) installed inside. The top piston (4) has an air guide screw (5) installed inside. The surface of the top piston (4) has a cutter holder (6). The surface of the aluminum water jacket (1) has an upper bearing seat (7). The upper bearing seat (7) has a mounting base (8) installed inside. The surface of the mounting base (8) has an encoder (9). The mounting base (8) has a cutter plate (10) installed inside. The encoder (9) has a shaft (11) mounted on its surface, and the shaft (11) is rotatably connected to the housing (15). A pull rod (12) is installed inside the shaft (11), and one end of the pull rod (12) is located inside the cutter holder (6). A butterfly spring (13) is installed between the pull rod (12) and the shaft (11). A rotor (14) is mounted on the surface of the shaft (11). A housing (15) is mounted on the surface of the upper bearing seat (7). A stator (16) is installed inside the housing (15). A claw (17) is mounted on one end of the pull rod (12), and the claw (17) is located inside the shaft (11).

2. The electric spindle with built-in multi-stage cylinder booster for tool changing according to claim 1, characterized in that, The surface of the aluminum water jacket (1) is fitted with a spring cover plate (18), and the air pipe connector (3) is located inside the spring cover plate (18).

3. The electric spindle with built-in multi-stage cylinder booster for tool changing according to claim 1, characterized in that, The surface of the aluminum water jacket (1) is equipped with multiple power connectors (19).

4. The electric spindle with built-in multi-stage cylinder booster for tool changing according to claim 1, characterized in that, A sealing ring (20) is provided between the piston (4) and the cylinder (2).

5. The electric spindle with built-in multi-stage cylinder booster for tool changing according to claim 1, characterized in that, The upper bearing housing (7) is fitted with a support plate (21), and the shaft (11) is located inside the support plate (21).

6. The electric spindle with built-in multi-stage cylinder booster for tool changing according to claim 1, characterized in that, A sliding sleeve (22) is installed between the disc springs (13).

7. The electric spindle with built-in multi-stage cylinder booster for tool changing according to claim 1, characterized in that, A lower cover (23) is installed at one end of the housing (15).

8. The electric spindle with built-in multi-stage cylinder booster for tool changing according to claim 1, characterized in that, A fixing plate (24) is mounted on the surface of the housing (15).

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