Broach mechanism for long-span main shaft

Abstract

The broach mechanism for the long-span main shaft comprises a main shaft body, the surface of a pull rod is movably connected with a pull rod sliding sleeve in a sleeved mode, a sealing ring is installed on the surface of one side of the pull rod sliding sleeve in an embedded mode, the outer side of the pull rod sliding sleeve is connected with a sliding sleeve fixing block, and the sliding sleeve fixing block is fixedly connected with the main shaft body. A hexagonal groove hole is fixedly formed in the surface of one side of the sliding sleeve fixing block, four sets of rear bearings and four sets of front bearings are installed on the inner side of the main shaft body, a front bearing seat is fixedly installed on one side of each front bearing, movement of a pull rod is separated from rotation of a rotor assembly, the complexity of the pull rod is reduced, and the service life of the pull rod is prolonged. And the number of structural parts is reduced. The fixing of the pull rod sliding sleeve can effectively reduce vibration and noise caused by too many degrees of freedom of the pull rod, the front bearing and the rear bearing are used at the front end of the main shaft body, through the paired use of the bearings, the axis positioning of the rotor assembly during high-speed rotation can be kept, and vibration and deviation are reduced.

Description

Technical Field

[0001] This utility model belongs to the field of CNC machine tool technology, specifically relating to a broaching mechanism used in a long-span spindle. Background Technology

[0002] The broaching mechanism is a key component of an automatic tool changer spindle. Its main function is to hold the cutting tool during machining operations and, with the assistance of an ATC (Automatic Tool Changer) robot, change the tool as needed. A broaching mechanism typically consists of a catch, drawbar, disc spring, pull stud, and power unit (such as a hydraulic / pneumatic cylinder). These components work together to ensure the stability and accuracy of the cutting tool during machining.

[0003] In existing spindle designs, the drawbar sleeve is fixed to the drawbar, which is affected by centrifugal motion. This increases the accuracy requirements for the sleeve's movement and may lead to increased spindle vibration and decreased machining accuracy. It also increases the complexity of manufacturing and drawbar assembly, resulting in greater spindle machining difficulty and weaker machining performance. Therefore, we propose a broaching mechanism for long-span spindles. Utility Model Content

[0004] The purpose of this invention is to provide a broaching mechanism for long-span spindles to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a broaching mechanism for a long-span spindle, comprising a spindle body, drawbars on both sides of an internal channel of the spindle body, a drawbar sleeve on the surface of the drawbar, a sealing ring on one side of the drawbar sleeve, a rotor assembly at the bottom of the spindle body, a sleeve fixing block on the outer side of the drawbar sleeve, a hexagonal slot on one side of the sleeve fixing block, a cylinder assembly on the upper inner side of the spindle body, a rear bearing and a front bearing on the inner side of the spindle body, a rear bearing seat on one side of the rear bearing, a front bearing seat on one side of the front bearing, a steel cylinder on the outer side of the spindle body, a spacer ring assembly on the inner side of the steel cylinder, a claw mechanism at the bottom of the spindle body, and a disc on the inner side of the spindle body.

[0006] Preferably, a pull rod slide sleeve is movably connected to the surface of the pull rod, and a sealing ring is embedded in one side surface of the pull rod slide sleeve.

[0007] Preferably, a sliding sleeve fixing block is connected to the outer side of the pull rod sliding sleeve, and a hexagonal slot hole is fixedly opened on one side surface of the sliding sleeve fixing block.

[0008] Preferably, a rear bearing and a front bearing are respectively installed on the inner side of the main shaft body, and a total of four sets of the rear bearing and the front bearing are provided.

[0009] Preferably, a front bearing housing is fixedly installed on one side of the front bearing, and steel cylinders are installed at both ends of the outer side of the main shaft body.

[0010] Preferably, a puller mechanism is installed in the bottom channel of the spindle body.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] The movement of the tie rod is separated from the rotation of the rotor assembly, reducing the complexity of the tie rod and the number of structural components. The fixing of the tie rod sleeve can effectively reduce the vibration and noise caused by excessive freedom of the tie rod. The front and rear bearings at the front end of the spindle body, through the paired use of bearings, can maintain the axial positioning of the rotor assembly during high-speed rotation, reduce vibration and misalignment, and enhance the load-bearing capacity of the spindle body. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the sliding sleeve fixing block structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the tie rod structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the cylinder assembly structure of this utility model.

[0017] In the diagram: 1. Main spindle body; 2. Tie rod; 3. Tie rod sleeve; 4. Sealing ring; 5. Rotor assembly; 6. Sleeve fixing block; 601. Hexagonal slot hole; 7. Cylinder assembly; 8. Rear bearing; 9. Rear bearing housing; 10. Front bearing; 11. Front bearing housing; 12. Steel cylinder; 13. Spacer ring assembly; 14. Claw mechanism; 15. Disc. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-4This utility model provides a technical solution: a broaching mechanism for a long-span spindle, including a spindle body 1, pull rods 2 on both sides of the internal channel of the spindle body 1, pull rod sleeves 3 on the surface of the pull rods 2, a sealing ring 4 on one side of the pull rod sleeves 3, a rotor assembly 5 at the bottom end of the spindle body 1, a sleeve fixing block 6 on the outer side of the pull rod sleeves 3, a hexagonal slot 601 on one side of the sleeve fixing block 6, a cylinder assembly 7 on the upper inner side of the spindle body 1, a rear bearing 8 and a front bearing 10 on the inner side of the spindle body 1, a rear bearing seat 9 on one side of the rear bearing 8, a front bearing seat 11 on one side of the front bearing 10, a steel cylinder 12 on the outer side of the spindle body 1, a spacer ring assembly 13 on the inner side of the steel cylinder 12, a claw mechanism 14 at the bottom of the spindle body 1, and a disc 15 on the inner side of the spindle body 1.

[0020] Specifically, a pull rod sleeve 3 is movably connected to the surface of the pull rod 2. A sealing ring 4 is embedded in one side surface of the pull rod sleeve 3. A sleeve fixing block 6 is connected to the outside of the pull rod sleeve 3. A hexagonal slot hole 601 is fixedly opened on one side surface of the sleeve fixing block 6. A rear bearing 8 and a front bearing 10 are respectively installed on the inner side of the spindle body 1. There are four sets of rear bearings 8 and front bearings 10. A front bearing seat 11 is fixedly installed on one side of the front bearing 10. Steel cylinders 12 are installed at both ends of the outer side of the spindle body 1. A claw mechanism 14 is installed in the bottom channel of the spindle body 1.

[0021] In this embodiment, the sliding sleeve fixing block 6 is fitted with the front end inner hole of the rotor assembly 5. The inner hole of the rotor assembly 5 is provided with threads and steps. The length of the pull rod sliding sleeve 3 can be controlled by adjusting the distance of the steps to adapt to different working requirements. The center of the surface of the sliding sleeve fixing block 6 is designed with an internal hexagonal slot 601, which is convenient for tightening with an internal hexagonal wrench, thereby ensuring the firmness and stability of the pull rod sliding sleeve 3. By providing a circular groove on the end face of the sliding sleeve fixing block 6, it is possible to effectively prevent the sliding sleeve fixing block 6 from deforming and protruding during the tightening process, which would affect the assembly accuracy of other parts. The pull rod sliding sleeve 3 is relatively stable when fixed on the rotor assembly 5. The movement of the pull rod 2 is separated from the rotation of the rotor assembly 5, which reduces the complexity of the pull rod 2 and the number of structural parts. The fixing of the tie rod sleeve 3 can effectively reduce the vibration and noise caused by excessive freedom of the tie rod 2. The front bearing 10 and the rear bearing 8 are used at the front end of the spindle body 1. Through the pairing of the bearings, the axial positioning of the rotor assembly 5 can be maintained during high-speed rotation, reducing vibration and offset, and enhancing the load-bearing capacity of the spindle body 1. With most of the structure of the spindle body 1 unchanged, the cylinder assembly 7 can be designed as a hydraulic cylinder or a pneumatic cylinder, and the tie rod 2 can have either a center air outlet or a center water outlet. Moreover, by simply changing the structure of the front bearing seat 11 and the rear bearing seat 9, it can be converted to direct injection lubrication or side injection lubrication. With slight design adjustments, the spindle body 1 can be adapted to different tools, working requirements, and processing needs, improving the application range of the spindle body 1, reducing the complexity of design and production, saving costs, and enhancing the competitiveness of enterprises.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A broach mechanism for use in a long span spindle comprising a spindle body (1) characterised in that: The spindle body (1) has pull rods (2) on both sides of its internal channel. The surface of the pull rods (2) is provided with pull rod sleeves (3). A sealing ring (4) is provided on one side of the pull rod sleeves (3). A rotor assembly (5) is provided at the bottom of the spindle body (1). A sleeve fixing block (6) is provided on the outside of the pull rod sleeves (3). A hexagonal slot (601) is provided on one side of the sleeve fixing block (6). A cylinder assembly (7) is provided on the upper inner side of the spindle body (1). The spindle body (1) has a rear bearing (8) and a front bearing (10) on its inner side. The rear bearing (8) has a rear bearing seat (9) on one side and a front bearing seat (11) on one side. The spindle body (1) has a steel cylinder (12) on its outer side and a spacer ring assembly (13) on its inner side. The spindle body (1) has a pull claw mechanism (14) at its bottom and a disc (15) on its inner side.

2. A broach mechanism for use with a long span spindle as claimed in claim 1, wherein: The surface of the pull rod (2) is movably connected to the pull rod sleeve (3), and a sealing ring (4) is embedded in one side surface of the pull rod sleeve (3).

3. A broaching mechanism for a long-span spindle according to claim 1, characterized in that: The outer side of the pull rod slide sleeve (3) is connected to a slide sleeve fixing block (6), and a hexagonal slot hole (601) is fixedly opened on one side surface of the slide sleeve fixing block (6).

4. A broaching mechanism for a long-span spindle according to claim 1, characterized in that: The inner side of the main shaft body (1) is respectively equipped with a rear bearing (8) and a front bearing (10), and there are four sets of the rear bearing (8) and the front bearing (10).

5. A broaching mechanism for a long-span spindle according to claim 1, characterized in that: A front bearing seat (11) is fixedly installed on one side of the front bearing (10), and steel cylinders (12) are installed at both ends of the outer side of the main shaft body (1).

6. A broaching mechanism for a long-span spindle according to claim 1, characterized in that: A claw mechanism (14) is installed in the bottom channel of the main spindle body (1).

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