Split main shaft structure

Abstract

This utility model discloses a split-type spindle structure, including a spindle connected to a pulley via a drive transmission. The pulley is connected to a connecting disc. A convex ring is provided at the front end of the spindle. A front spacer ring and a front spacer sleeve are detachably connected to one side of the convex ring, with a front bearing between them. A front bearing seat is provided on the outer periphery of the front bearing, and a positioning flange is provided on the outer periphery of the front bearing seat. A detachable bearing cap is provided at the front end of the front bearing seat, and a sealing structure is provided on the opposite side of the bearing cap and the front spacer ring. A rear spacer sleeve and a rear spacer ring are connected to one end of the pulley, with a rear bearing between them. A rear bearing seat is provided on the outer periphery of the rear bearing. The entire structure is a detachable split-type structure, significantly reducing maintenance costs. Components can be disassembled and assembled individually, greatly shortening maintenance time. The spindle assembly method and structure can be fine-tuned according to different processing requirements, enhancing the machine tool's adaptability to various processing needs.

Description

Technical Field

[0001] This utility model relates to the field of machine tool technology, and in particular to a split spindle structure. Background Technology

[0002] In the machine tool industry, the spindle is a core component, and its performance has a significant impact on machining accuracy and efficiency.

[0003] While traditional integral spindles have a simple structure, they have many drawbacks. If any part of the spindle is damaged, the entire spindle needs to be replaced, which is costly and time-consuming, seriously affecting production schedules.

[0004] Moreover, when faced with different processing requirements, the integral spindle is difficult to adjust its structure and parameters flexibly, which limits the processing range and adaptability of the machine tool. Utility Model Content

[0005] This invention provides a split-type spindle structure to solve the problems mentioned in the background section. It can reduce maintenance costs, shorten maintenance time, and improve the spindle's adaptability to different machining tasks.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A split-type spindle structure includes a spindle, the tail end of which is connected to a pulley via a flat key, and the tail end of the pulley is fastened to a connecting disc; the front end of the spindle is provided with a protruding ring.

[0008] The convex ring portion is detachably connected to a front spacer ring and a front spacer sleeve on the side away from the workpiece direction, and a front bearing is provided between the front spacer ring and the front spacer sleeve. A front bearing seat is provided on the outer periphery of the front bearing, and a detachably connected positioning flange is provided on the outer periphery of the front bearing seat. A detachably connected bearing cover is provided at the front end of the front bearing seat, and a sealing structure is provided on the opposite side of the bearing cover and the front spacer ring.

[0009] The pulley is detachably connected to a rear spacer sleeve and a rear spacer ring at one end facing the workpiece, and a rear bearing is provided between the rear spacer sleeve and the rear spacer ring, with a rear bearing seat provided on the outer periphery of the rear bearing.

[0010] Preferably, the sealing structure is a series of mutually adaptable and close-fitting bends.

[0011] Preferably, the outer edge of the convex ring is provided with a front cover that is fastened to the bearing cap.

[0012] Preferably, the main shaft is provided with a limiting groove near the front spacer sleeve.

[0013] Preferably, the main shaft has a stepped portion near the rear spacer ring.

[0014] Preferably, the outer diameter of the stepped portion is smaller than the inner diameter of the front spacer sleeve and the front spacer ring.

[0015] Preferably, the front cover has a sealing ring groove on the side near the convex ring portion.

[0016] Preferably, the front bearing housing has a sealing ring groove two on the side near the front spacer sleeve.

[0017] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows:

[0018] 1. Maintenance costs are significantly reduced. When a part of the spindle is damaged, only that part needs to be disassembled and reassembled. Maintenance time is greatly shortened, improving the efficiency of machine tool use.

[0019] 2. The spindle assembly method and structure can be finely adjusted according to different processing requirements, which enhances the machine tool's adaptability to various processing needs.

[0020] 3. The stability of the spindle system has been significantly improved. By controlling the quality of each component and strictly selecting and matching important components such as bearings during assembly, every step is done with meticulous care, providing strong support for the stability of the spindle system. Attached Figure Description

[0021] Appendix Figure 1 This is a three-dimensional schematic diagram of the structure of this utility model;

[0022] Appendix Figure 2 This is a schematic front view of the structure of this utility model;

[0023] Appendix Figure 3 For the appendix Figure 2 Schematic sectional view of the structure along the AA direction;

[0024] Appendix Figure 4 For the appendix Figure 3 Enlarged view of the structure at point B in the middle;

[0025] Appendix Figure 5 This is a three-dimensional schematic view of the structure of this utility model after the pulley is removed.

[0026] Attached Figure

[0027] 1. Mandrel 101, Stepped platform 102, Raised ring 103, Limiting groove 2, Front cover 21, Sealing ring groove one 3, Bearing cap 4, Positioning flange 5, Front bearing seat 51, Front bearing 52, Sealing ring groove two 6, Rear spacer ring 7, Rear bearing seat 71, Rear bearing 8, Pulley 9, Connecting disc 11, Rear spacer sleeve 12, Front spacer sleeve 13, Front spacer ring 14, Fastener 15, Flat key tooth 16, Stepped platform 17, Sealing structure. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the following is a summary description. Figure 1 To be continued Figure 5 The present invention will be further described in detail with reference to embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of the present invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present invention.

[0029] This embodiment discloses a split spindle structure, which can reduce maintenance costs, shorten maintenance time, and improve the spindle's adaptability to different machining tasks.

[0030] refer to Figures 1 to 5 Specifically, it includes: a main shaft 1, the tail end of which is connected to a pulley 8 via a key 15, thereby driving the main shaft 1 to rotate synchronously. The two can be fixed together by fasteners (such as fastening bolts). The tail end of the pulley 8 (V-belt pulley) is fastened to a connecting disc 9, which can be used to connect other components. The front end of the main shaft 1 is provided with a convex ring 102, and the side facing the workpiece has a threaded hole (such as a through hole or blind hole) for fastening connection, so as to connect various clamps used to grip the workpiece.

[0031] The front spacer ring 13 and the front spacer sleeve 12 are detachably connected to the side of the convex ring portion 102 away from the workpiece direction. They can be disassembled and reassembled, with the front spacer ring 13 contacting and limiting the movement of the convex ring portion 102. A front bearing 51 is provided between the front spacer ring 13 and the front spacer sleeve 12. A front bearing seat 5 is provided on the outer periphery of the front bearing 51. A detachably connected positioning flange 4 is provided on the outer periphery of the front bearing seat 5. The positioning flange 4 is also provided with threaded holes for connecting other components, so that the front bearing seat 5 does not rotate, and the main shaft 1 and the front bearing 51 rotate stably in the axial direction.

[0032] The front bearing housing 5 is provided with a detachable bearing cap 3 at its front end, and the bearing cap 3 and the front spacer ring 13 are respectively provided with sealing structures 17 on their opposite sides. The sealing structures can achieve better sealing of the front bearing 51 without contact. The sealing structure 17 is specifically a bend that fits together. The bends can form multiple bends and gaps, so that various debris or cutting fluid will not enter the front bearing 51 during operation.

[0033] The pulley 8 is detachably connected to a rear spacer sleeve 11 and a rear spacer ring 6 at the end facing the workpiece. They can be disassembled and assembled. A rear bearing 71 is provided between the rear spacer sleeve 11 and the rear spacer ring 6. A rear bearing seat 7 is provided on the outer periphery of the rear bearing 71. Since the rear bearing 71 is away from the workpiece, it does not need to adopt the sealing structure of the front bearing 51, which also facilitates heat dissipation and disassembly.

[0034] To improve the sealing effect, the outer edge of the convex ring portion 102 is provided with a front cover 2 that is fastened to the bearing cover 3. The front cover 2 is fastened to the bearing cover 3 by fasteners to further seal the gaps between the components. In addition, a groove for placing an O-ring can be provided on the side of the front cover 2 near the convex ring portion 102 to improve the sealing performance.

[0035] To facilitate positioning, the main shaft 1 is provided with a positioning groove 103 near the front spacer sleeve 12, where a positioning retaining ring can be installed to limit the front spacer sleeve 12 in the axial direction.

[0036] The main shaft 1 is provided with a stepped portion 101 near the rear spacer 6, which can limit excessive axial movement of the rear spacer 6. Moreover, the outer diameter of the stepped portion 101 is smaller than the inner diameter of the front spacer sleeve 12 and the front spacer 13, thereby facilitating the smooth installation of the front spacer 13, the front spacer sleeve 12 and the front bearing 51.

[0037] To achieve a good sealing effect, the front cover 2 has a sealing ring groove 21 on the side near the convex ring 102. The front bearing seat 5 has a sealing ring groove 52 on the side near the front spacer sleeve 12.

[0038] By adopting the above structure, the maintenance cost of this invention is significantly reduced. When a part of the spindle is damaged, only that part needs to be disassembled and reassembled, greatly shortening the maintenance time and improving the efficiency of the machine tool. The spindle assembly method and structure can be fine-tuned according to different processing requirements, enhancing the machine tool's adaptability to various processing needs. The stability of the spindle system is significantly improved. By controlling the quality of each component and strictly selecting and matching important components such as bearings during assembly, every step is meticulously executed, providing strong support for the stability of the spindle system.

[0039] The spindle adopts an integral cylindrical structure design, providing robust support for the connections between various components. It also serves as the foundation of the entire spindle system, ensuring the stability of component assembly and the overall precision of the system. The front end of the spindle features a high-precision clamping interface and bearing mounting positions. The rear end of the spindle can be connected to the drive unit, providing rotational power to the spindle system. The interaction of various components and bearings constitutes the front and rear structure of the spindle.

[0040] The components used in this invention include high-strength, high-precision locating pins, bearing seats, locating flanges, and V-belt pulleys. These components together form the front and rear ends of the spindle. Through high-precision spindle series connection, the coaxiality runout of the front and rear ends of the spindle system is ensured, guaranteeing rotational accuracy.

[0041] The assembly principle of this utility model is as follows:

[0042] 1. First, select appropriate bearings and parts according to assembly requirements, ensuring that their materials, dimensions and performance meet the requirements.

[0043] 2. Assemble the selected bearings onto the spindle mandrel and fix them in place using bearing housings, spacers, etc.

[0044] 3. Assemble the positioning flange, spacer sleeve, etc. onto the mandrel.

[0045] 4. Connect and fix the V-belt pulley and the flat key with connecting disc, bolts, etc. During the assembly process, use high-precision measuring instruments to monitor the coaxiality of each component of the spindle to ensure that the assembly accuracy requirements are met.

[0046] 5. After assembly, perform dynamic balancing and precision testing on the split-type spindle. Once it passes the test, it can be installed on the machine tool and put into use. During use, regularly maintain and inspect the spindle, and adjust it as needed based on the machining requirements.

[0047] This invention can meet different customer needs by replacing its internal bearing unit, such as heavy cutting machine tools and high-speed machine tools. Compared with integral spindles, split spindles have the advantages of convenient maintenance and easy configuration replacement, and are more in line with customer needs.

[0048] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A split spindle structure, comprising a spindle (1), wherein the tail end of the spindle (1) is connected to a pulley (8) via a flat key (15), and a connecting disc (9) is fastened to the tail end of the pulley (8); the front end of the spindle (1) is provided with a protruding ring (102). Its features are: The convex ring (102) is detachably connected to a front spacer ring (13) and a front spacer sleeve (12) on the side away from the workpiece direction. A front bearing (51) is provided between the front spacer ring (13) and the front spacer sleeve (12). A front bearing seat (5) is provided on the outer periphery of the front bearing (51). A detachably connected positioning flange (4) is provided on the outer periphery of the front bearing seat (5). A detachably connected bearing cap (3) is provided at the front end of the front bearing seat (5). A sealing structure (17) is provided on the opposite side of the bearing cap (3) and the front spacer ring (13). The pulley (8) is detachably connected to a rear spacer sleeve (11) and a rear spacer ring (6) at one end facing the workpiece, and a rear bearing (71) is provided between the rear spacer sleeve (11) and the rear spacer ring (6), and a rear bearing seat (7) is provided on the outer periphery of the rear bearing (71).

2. The split-type spindle structure according to claim 1, characterized in that: The sealing structure (17) is a bent part that fits together.

3. The split-type spindle structure according to claim 2, characterized in that: The outer edge of the convex ring (102) is provided with a front cover (2) that is fastened to the bearing cover (3).

4. The split-type spindle structure according to claim 1, characterized in that: The main shaft (1) is provided with a limiting groove (103) near the front spacer sleeve (12).

5. The split-type spindle structure according to claim 1, characterized in that: The main shaft (1) is provided with a stepped portion (101) near the rear spacer ring (6).

6. The split-type spindle structure according to claim 5, characterized in that: The outer diameter of the stepped portion (101) is smaller than the inner diameter of the front spacer sleeve (12) and the front spacer ring (13).

7. The split-type spindle structure according to claim 3, characterized in that: The front cover (2) has a sealing ring groove (21) on the side near the protruding ring (102).

8. The split-type spindle structure according to claim 1, characterized in that: The front bearing housing (5) has a sealing ring groove 2 (52) on the side near the front spacer sleeve (12).

Images