A turning and milling combined spindle bearing unloading protection structure

Abstract

The utility model discloses a kind of turning-milling composite spindle bearing unloading protection structures, including static tooth disc and dynamic tooth disc, static tooth disc is fixed in shell, dynamic tooth disc is sleeved in main shaft, dynamic tooth disc is rotatably connected in static tooth disc, static tooth disc both sides are equipped with oil cavity, oil cavity is located in shell, piston and common tooth disc are slidably fitted in two oil cavities respectively, piston and common tooth disc are clamped static tooth disc and dynamic tooth disc, common tooth disc is engaged with static tooth disc and dynamic tooth disc, static tooth disc is equipped with reset unit, reset unit is used to reset piston and common tooth disc, the utility model discloses a kind of turning-milling composite spindle bearing unloading protection structures, static tooth disc and dynamic tooth disc are set using split, before tool changing, static tooth disc and dynamic tooth disc are clamped by common tooth disc and piston first, so that common tooth disc engages static tooth disc and dynamic tooth disc, then carry out automatic tool changing action, can unload in dynamic tooth disc and static tooth disc on the force of beating sword, so that bearing is not stressed, protect bearing, prolong the service life of bearing.

Description

Technical Field

[0001] This utility model relates to milling and turning spindle technology, specifically a bearing unloading and protection structure for a milling and turning composite spindle. Background Technology

[0002] A machine spindle is the shaft on a machine tool that drives the workpiece or cutting tool to rotate. It typically consists of a spindle, bearings, and transmission components (gears or pulleys). The motion accuracy and structural rigidity of the spindle assembly are crucial factors determining machining quality and cutting efficiency.

[0003] Existing milling and turning spindles generate a cutting force during tool changes, which acts directly on the bearings. Prolonged stress on the bearings leads to rapid wear and reduces their lifespan. Utility Model Content

[0004] To address the shortcomings of the prior art, this utility model provides a bearing unloading and protection structure for a milling and turning composite spindle. Before tool changing, the gear plate is engaged, and then the automatic tool changing action is performed. This unloads the cutting force onto the moving and stationary gear plates, ensuring that the bearing is not subjected to force, thereby protecting the bearing and extending its service life.

[0005] To achieve the above technical objectives, this utility model adopts the following technical solution: a bearing unloading protection structure for a milling and turning composite spindle, disposed between a housing and a shaft body. The shaft body is fitted with several angular contact ball bearings, the outer walls of which are fixed to the housing. Each bearing includes a stationary gear plate and a movable gear plate. The stationary gear plate is fixed to the housing, and the movable gear plate is fitted onto the spindle. The movable gear plate is rotatably connected within the stationary gear plate. The movable gear plate and the stationary gear plate are coaxially arranged. Oil chambers are provided on both sides of the stationary gear plate, located within the housing. A piston and a common gear plate are slidably fitted within each of the two oil chambers. The piston and the common gear plate clamp the stationary gear plate and the movable gear plate. The common gear plate meshes with both the stationary and movable gear plates. The stationary gear plate is equipped with a reset unit for resetting the piston and the common gear plate.

[0006] Preferably, the reset unit includes a reset spring, which passes through a through hole in the stationary gear disk. The through hole is located in the stationary gear disk, and both ends of the reset spring are respectively located in spring mounting slots. The two spring mounting slots are respectively located in the piston and the common gear disk.

[0007] Preferably, the housing is provided with an oil passage that connects the two oil chambers to the hydraulic device.

[0008] In summary, this utility model achieves the following technical effects:

[0009] The milling and turning composite spindle bearing unloading protection structure of this utility model adopts a separate stationary gear plate and a moving gear plate. Before tool changing, the stationary gear plate and the moving gear plate are clamped by a common gear plate and a piston. The stationary gear plate and the moving gear plate are engaged by the common gear plate before the automatic tool changing action is performed. The tool changing force can be unloaded on the moving gear plate and the stationary gear plate, so that the angular contact ball bearing is not stressed, protecting the bearing and extending the service life of the bearing. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the internal structure of the milling and turning composite spindle bearing unloading protection structure of this utility model;

[0011] Figure 2 yes Figure 1 Enlarged view of part A;

[0012] Explanation of reference numerals in the accompanying drawings: 1. Housing; 2. Shaft; 3. Angular contact ball bearing; 4. Oil passage; 5. Oil cavity; 6. Stationary gear disc; 7. Moving gear disc; 8. Common gear disc; 9. Piston; 10. Return spring. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to the accompanying drawings.

[0014] 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.

[0015] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0016] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0017] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0018] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0019] Example 1:

[0020] like Figure 1 As shown in Figure 2, a bearing unloading protection structure for a milling and turning composite spindle is disposed between a housing 1 and a spindle body 2. The spindle body 2 is fitted with several angular contact ball bearings 3, the outer walls of which are fixed to the housing 1. The structure includes a stationary gear plate 6 and a movable gear plate 7. The stationary gear plate 6 is fixed to the housing 1, and the movable gear plate 7 is fitted onto the spindle. The movable gear plate 7 is rotatably connected to the stationary gear plate 6 and is coaxially arranged with the stationary gear plate 6. Oil chambers 5 are provided on both sides of the stationary gear plate 6 and are located inside the housing 1. A piston 9 and a common gear plate 8 are slidably fitted in the two oil chambers 5, respectively. The piston 9 and the common gear plate 8 cooperate to clamp the stationary gear plate 6 and the movable gear plate 7. The common gear plate 8 meshes with the stationary gear plate 6 and the movable gear plate 7. The stationary gear plate 6 is provided with a reset unit for resetting the piston 9 and the common gear plate 8.

[0021] The milling and turning composite spindle bearing unloading protection structure of this embodiment adopts a separate stationary gear plate 6 and a moving gear plate 7. Before tool change, the hydraulic device pressurizes, so that the common gear plate 8 and the piston 9 clamp the stationary gear plate 6 and the moving gear plate 7. The common gear plate 8 meshes with the stationary gear plate 6 and the moving gear plate 7, and then the automatic tool change action is performed. The cutting force can be unloaded on the moving gear plate 7 and the stationary gear plate 6, so that the angular contact ball bearing 3 is not stressed, protecting the bearing and extending the service life of the bearing.

[0022] After the tool change operation is completed, the hydraulic device is depressurized, and the reset unit opens the common gear plate 8 and the piston 9, so that the stationary gear plate 6 and the moving gear plate 7 are separated, and the shaft 2 can rotate freely.

[0023] The reset unit includes a reset spring 10, which passes through a through hole in the stationary gear disk 6. The through hole is located in the stationary gear disk 6. Both ends of the reset spring 10 are respectively located in spring mounting slots, and the two spring mounting slots are respectively located in the piston 9 and the common gear disk.

[0024] The outer casing 1 is provided with an oil passage 4, which connects two oil chambers 5 to a hydraulic device. The hydraulic device is located in the machining center and is used to control the liquid pressure in the oil chambers 5 to realize the movement of the piston 9 and the common gear plate 8.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. A bearing unloading protection structure for a milling and turning composite spindle, disposed between a housing and a spindle body, wherein the spindle body is fitted with a plurality of angular contact ball bearings, and the outer wall of the angular contact ball bearings is fixed to the housing, characterized in that, The device includes a stationary gear disk and a movable gear disk. The stationary gear disk is fixed to the outer casing, and the movable gear disk is sleeved on the main shaft. The movable gear disk is rotatably connected inside the stationary gear disk. The movable gear disk and the stationary gear disk are coaxially arranged. Oil chambers are provided on both sides of the stationary gear disk. The oil chambers are located inside the outer casing. A piston and a common gear disk are slidably engaged in the two oil chambers, respectively. The piston and the common gear disk cooperate to clamp the stationary gear disk and the movable gear disk. The common gear disk meshes with the stationary gear disk and the movable gear disk. The stationary gear disk is provided with a reset unit, which is used to reset the piston and the common gear disk.

2. The unloading protection structure for a milling-turning composite spindle bearing according to claim 1, characterized in that, The reset unit includes a reset spring, which passes through a through hole in the stationary gear disk. The through hole is located in the stationary gear disk, and the two ends of the reset spring are respectively located in spring mounting slots. The two spring mounting slots are respectively located in the piston and the common gear disk.

3. The unloading protection structure for a milling-turning composite spindle bearing according to claim 1, characterized in that, The housing is provided with an oil passage that connects two oil chambers to a hydraulic device.

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