A CNC lathe spindle box structure

Abstract

This utility model relates to the field of CNC lathe technology and discloses a CNC lathe spindle box structure, including a spindle box body and a base plate. The base plate is fixedly connected to the bottom of the spindle box body. A drive shaft and a spindle are rotatably connected inside the spindle box body. The spindle shaft extends to the outside of the spindle box body and is fixedly connected to a three-jaw chuck. An opening is provided on the inner wall of the top of the spindle box body. A cover plate is inserted into the inner wall of the opening of the spindle box body. Multiple drive gears are fixedly sleeved on the drive shaft shaft, and multiple transmission gears are fixedly sleeved on the spindle shaft shaft. The rotating handle provided by this utility model drives the cam chuck to rotate. The eccentric structure of the cam causes its outer peripheral surface to press against the inner wall of the chuck groove of the spindle box body. The long axis of the cam chuck is aligned with the chuck groove. Anti-slip rubber strips provide friction to ensure reliable sealing of the cover plate. The cover plate can be removed when the rotating handle is rotated until the short axis of the cam chuck is aligned with the chuck groove.

Description

Technical Field

[0001] This utility model relates to the field of CNC lathe technology, and in particular to a CNC lathe spindle box structure. Background Technology

[0002] A CNC lathe is an automated machine tool that uses a computer numerical control system to control the movement of cutting tools and perform operations such as turning, drilling, and threading on rotating workpieces. It is one of the core equipment in the field of machining and is widely used for the precision machining of shaft and disc parts. The spindle box is one of the core functional components of a CNC lathe, and its performance directly affects the machining capability of the CNC lathe.

[0003] In existing technologies, during the use of CNC lathe spindle boxes, multiple sets of transmission gears are installed inside the spindle box to drive the spindle in order to ensure the spindle's rotation effect. However, these gears will wear after prolonged use. Furthermore, the spindle box is tightly connected to protect the internal transmission components, making disassembly of the spindle box difficult for subsequent maintenance and repair. Therefore, this application designs a CNC lathe spindle box structure. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that in the prior art, multiple sets of gears will wear out after long-term use, and the spindle box is tightly connected as a whole to ensure the protection of the internal transmission components, which makes it inconvenient to disassemble the spindle box for subsequent maintenance and repair. Therefore, a spindle box structure for CNC lathes is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A CNC lathe spindle box structure includes a spindle box body and a base plate. The base plate is fixedly connected to the bottom of the spindle box body. A drive shaft and a spindle are rotatably connected inside the spindle box body. The spindle shaft extends to the outside of the spindle box body and is fixedly connected to a three-jaw chuck. An opening is formed on the inner wall of the top of the spindle box body. A cover plate is inserted into the inner wall of the opening of the spindle box body. Multiple drive gears are fixedly sleeved on the shaft of the drive shaft. Multiple transmission gears are fixedly sleeved on the shaft of the spindle body. An opening is formed on the inner wall of the cover plate. A slot is formed on the inner wall of the top of the spindle box body. A cam chuck is rotatably mounted on the inner wall of the opening of the cover plate. The cam chuck is clamped onto the inner wall of the slot.

[0007] Preferably, a fixed partition is fixedly connected to the inner wall of the spindle housing, and the drive shaft and the spindle are rotatably connected to the inner wall of the fixed partition.

[0008] Preferably, a rotating handle is fixedly connected to the upper surface of the cam chuck, and the rotating handle extends above the cover plate.

[0009] Preferably, a plurality of anti-slip rubber strips are fixedly connected around the side wall of the cam chuck, and the plurality of anti-slip rubber strips are respectively attached to the inner wall of the spindle housing located in the slot.

[0010] Preferably, a sealing rubber frame is fixedly connected to the inner wall of the bottom end of the cover plate, and the side wall of the sealing rubber frame is pressed against the inner wall of the spindle housing located at the opening.

[0011] Preferably, the inner wall of the spindle housing has a cavity, a spring is fixedly connected to the inner wall of the spindle housing located in the cavity, a locking block is fixedly connected to the end of the spring, a locking slot is opened on the side wall of the cam chuck, and the locking block is locked in place on the inner wall of the locking slot.

[0012] Preferably, a pull rod is fixedly connected at the connection between the locking block and the spring, and the rod extends through the cavity to the outside of the spindle housing.

[0013] Compared with the prior art, this utility model provides a CNC lathe spindle box structure, which has the following beneficial effects:

[0014] 1. The spindle box structure of this CNC lathe drives the cam chuck to rotate by rotating the handle. The eccentric structure of the cam causes its outer peripheral surface to press against the inner wall of the slot of the spindle box. The long axis of the cam chuck is aligned with the slot. The anti-slip rubber strip provides friction to ensure reliable sealing of the cover plate. The cover plate can be removed when the handle is rotated until the short axis of the cam chuck is aligned with the slot.

[0015] 2. The spindle box structure of this CNC lathe uses medical-grade nitrile rubber for the sealing rubber frame to ensure airtightness between the cover plate and the spindle box body, preventing cutting fluid and dust from entering the box. The lip design of the rubber frame can automatically compensate for wear according to the pressure of the cover plate and maintain the sealing performance.

[0016] 3. The spindle box structure of this CNC lathe uses a spring to push the locking block into the slot of the cam chuck, forming a mechanical lock. When the cam chuck locks the cover plate, the locking block automatically locks under the action of the spring to prevent the handle from rotating accidentally. Pulling the pull rod compresses the spring, and the locking block disengages from the slot, allowing the handle to be rotated to unlock. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of a CNC lathe spindle box structure proposed in this utility model;

[0018] Figure 2 This is a partial structural cross-sectional view of a CNC lathe spindle box structure proposed in this utility model;

[0019] Figure 3 for Figure 2 Enlarged structural diagram of part A in the middle section;

[0020] Figure 4 for Figure 3 Three-dimensional view of the middle limiting block.

[0021] In the diagram: 1. Spindle housing, 2. Base plate, 3. Drive shaft, 4. Spindle, 5. Three-jaw chuck, 6. Cover plate, 7. Fixed partition, 8. Drive gear, 9. Transmission gear, 10. Cam chuck, 11. Rotary handle, 12. Anti-slip rubber strip, 13. Sealing rubber frame, 14. Spring, 15. Clamping block, 16. Pull rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-4 A CNC lathe spindle box structure includes a spindle box body 1 and a base plate 2. The base plate 2 is fixedly connected to the bottom of the spindle box body 1. A drive shaft 3 and a spindle 4 are rotatably connected inside the spindle box body 1. The shaft of the spindle 4 extends to the outside of the spindle box body 1 and is fixedly connected to a three-jaw chuck 5. An opening is provided on the inner wall of the top of the spindle box body 1. A cover plate 6 is inserted into the inner wall of the opening of the spindle box body 1. Multiple drive gears 8 are fixedly sleeved on the shaft of the drive shaft 3. Multiple transmission gears 9 are fixedly sleeved on the shaft of the spindle 4. An opening is provided on the inner wall of the cover plate 6. A slot is provided on the inner wall of the top of the spindle box body 1. A cam chuck 10 is rotatably provided on the inner wall of the opening of the cover plate 6. The cam chuck 10 is clamped in place on the inner wall of the slot.

[0024] A fixed partition 7 is fixedly connected to the inner wall of the spindle housing 1. The drive shaft 3 and the spindle 4 are rotatably connected to the inner wall of the fixed partition 7. A rotating handle 11 is fixedly connected to the upper surface of the cam chuck 10, and the rotating handle 11 extends to the top of the cover plate 6.

[0025] Multiple anti-slip rubber strips 12 are fixedly connected around the side wall of the cam chuck 10. The multiple anti-slip rubber strips 12 are respectively attached to the inner wall of the spindle housing 1 located in the slot. A sealing rubber frame 13 is fixedly connected to the bottom inner wall of the cover plate 6. The side wall of the sealing rubber frame 13 is pressed against the inner wall of the spindle housing 1 located in the opening.

[0026] Drive shaft 3 is driven to rotate by an external motor. Drive gear 8 on the shaft meshes with transmission gear 9 of spindle 4 to transmit power to spindle 4. Fixed partition 7 supports drive shaft 3 and spindle 4 to ensure gear meshing accuracy and avoid transmission vibration. Multiple drive gears 8 and transmission gears 9 form a multi-stage gear pair. By changing gears with different numbers of teeth or adjusting the meshing position, the speed of spindle 4 can be adjusted to adapt to different cutting conditions.

[0027] Rotating the handle 11 drives the cam chuck 10 to rotate. The eccentric structure of the cam causes its outer circumference to press against the inner wall of the slot of the spindle housing 1. The long axis of the cam chuck 10 is aligned with the slot. The anti-slip rubber strip 12 provides friction to ensure that the cover plate 6 is reliably sealed. Rotating the handle 11 until the short axis of the cam chuck 10 is aligned with the slot allows the cover plate 6 to be removed.

[0028] The sealing rubber frame 13 is made of medical-grade nitrile rubber to ensure the airtightness between the cover plate 6 and the spindle housing 1, preventing cutting fluid and dust from entering the housing. The lip design of the rubber frame can automatically compensate for wear according to the pressure of the cover plate and maintain the sealing performance.

[0029] To prevent the cam chuck 10 from shifting and affecting the locking effect, such as Figure 1-4 As shown, the inner wall of the spindle housing 1 has a cavity. A spring 14 is fixedly connected to the inner wall of the spindle housing 1 in the cavity. A locking block 15 is fixedly connected to the end of the spring 14. A slot is opened on the side wall of the cam chuck 10. The locking block 15 is locked in the inner wall of the slot. A pull rod 16 is fixedly connected at the connection between the locking block 15 and the spring 14. The rod of the pull rod 16 extends through the cavity to the outside of the spindle housing 1.

[0030] Spring 14 pushes the locking block 15 into the slot of cam chuck 10 to form a mechanical lock. After cam chuck 10 locks cover plate 6, locking block 15 automatically locks under the action of spring 14 to prevent handle 11 from rotating accidentally. Pulling pull rod 16 compresses spring 14, locking block 15 disengages from slot, and handle 11 can be rotated to unlock.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A CNC lathe spindle box structure, comprising a spindle box body (1) and a base plate (2), characterized in that: The base plate (2) is fixedly connected to the bottom of the spindle housing (1). The spindle housing (1) is rotatably connected to the drive shaft (3) and the spindle (4). The shaft of the spindle (4) extends to the outside of the spindle housing (1) and is fixedly connected to a three-jaw chuck (5). The top inner wall of the spindle housing (1) has an opening. The spindle housing (1) is fitted with a cover plate (6) on the inner wall of the opening. Multiple drive gears (8) are fixedly sleeved on the shaft of the drive shaft (3). Multiple transmission gears (9) are fixedly sleeved on the shaft of the spindle (4). The inner wall of the cover plate (6) has an opening. The top inner wall of the spindle housing (1) has a slot. The cover plate (6) is rotatably fitted with a cam chuck (10) on the inner wall of the opening. The cam chuck (10) is clamped in the inner wall of the slot.

2. The CNC lathe spindle box structure according to claim 1, characterized in that: The inner wall of the spindle housing (1) is fixedly connected to a fixed partition (7), and the drive shaft (3) and the spindle (4) are rotatably connected to the inner wall of the fixed partition (7).

3. The CNC lathe spindle box structure according to claim 1, characterized in that: A rotating handle (11) is fixedly connected to the upper surface of the cam chuck (10), and the rotating handle (11) extends above the cover plate (6).

4. The CNC lathe spindle box structure according to claim 1, characterized in that: Multiple anti-slip rubber strips (12) are fixedly connected around the side wall of the cam chuck (10), and the multiple anti-slip rubber strips (12) are respectively attached to the inner wall of the main shaft housing (1) located in the slot.

5. The CNC lathe spindle box structure according to claim 1, characterized in that: A sealing rubber frame (13) is fixedly connected to the inner wall of the bottom end of the cover plate (6), and the side wall of the sealing rubber frame (13) is pressed and set on the inner wall of the main shaft housing (1) located at the opening.

6. The CNC lathe spindle box structure according to claim 1, characterized in that: The inner wall of the spindle housing (1) has a cavity. A spring (14) is fixedly connected to the inner wall of the spindle housing (1) in the cavity. A locking block (15) is fixedly connected to the end of the spring (14). A locking slot is opened on the side wall of the cam chuck (10). The locking block (15) is locked in place on the inner wall of the locking slot.

7. The CNC lathe spindle box structure according to claim 6, characterized in that: A pull rod (16) is fixedly connected at the connection between the locking block (15) and the spring (14), and the rod of the pull rod (16) extends through the cavity to the outside of the main shaft housing (1).

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