An inverted direct-drive swap worktable

Abstract

The utility model discloses an inverted direct drive exchange workbench, including direct drive motor, axle core, rotary table bearing and static pressure main shaft, axle core rotation is connected on direct drive motor, static pressure main shaft is equipped with two, and all are fixed on direct drive motor, static pressure main shaft is located axle core axial intermediate position, static pressure main shaft bottom fixedly has the shaft sleeve, and rotary table bearing is installed between the shaft sleeve and axle core, the utility model has the advantages of simple structure, high machining precision and more energy -conserving.

Description

Technical Field

[0001] This utility model relates to the field of machine tool technology, specifically to an inverted direct drive exchange worktable. Background Technology

[0002] Currently, external thread grinding on the market can be divided into "multi-line grinding wheel grinding" or "profile grinding wheel grinding." The core principle is to utilize the "interference" between the grinding wheel and the workpiece to generate the thread profile. This method uses a profile grinding wheel with a width greater than the thread length. The cross-sectional shape of this grinding wheel is precisely dressed to perfectly match the tooth groove shape of the workpiece thread (e.g., the trapezoidal shape of a trapezoidal thread, the V-shape of a triangular thread). During operation, a high-precision diamond dressing wheel is used to dress the grinding wheel to create corresponding multi-line annular grooves based on the target thread's profile angle (e.g., 60°), pitch, and depth. The dressed multi-line grinding wheel is then inserted perpendicularly to the workpiece axis, with an angle between the grinding wheel axis and the workpiece axis equal to the workpiece's thread helix angle. This ensures that the grinding wheel surface fully contacts the thread profile, avoiding interference.

[0003] To improve the efficiency of multi-spindle grinding, an exchangeable worktable is used, which employs a dual-spindle structure to grind the workpiece simultaneously. Figure 1 As shown, the current rotary exchange worktable has its spindle located at the bottom of the worktable. When rotating, it generates an outward centrifugal force. After prolonged use, an angular misalignment will occur between the platform and the motor output shaft, which can easily lead to quality problems such as precision issues in the parts that are subsequently processed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an inverted direct drive exchange worktable, which has a simple structure, high machining accuracy and is more energy-efficient.

[0005] To solve the above problems, the present invention adopts the following technical solution: An inverted direct-drive exchange worktable includes a direct-drive motor, a spindle, a turntable bearing, and a hydrostatic spindle. The spindle is rotatably connected to the direct-drive motor. There are two hydrostatic spindles, both of which are fixed to the direct-drive motor. The hydrostatic spindle is located at the axial center of the spindle. A bushing is fixed to the bottom end of the hydrostatic spindle. The turntable bearing is installed between the bushing and the spindle.

[0006] A further technical solution is that the hydrostatic spindle has two spindles with their output ends facing opposite directions. After rotation, the workpiece or grinding wheel can be replaced, or they can rotate together in the same direction.

[0007] A further technical solution is that the lower end of the direct drive motor is connected to a motor mount, and the hydrostatic spindle is connected to the motor mount. The direct drive motor and the motor mount are separate for easy installation and maintenance, but they can also be an integrated structure.

[0008] A further technical solution is that a support bearing is installed between the motor base and the shaft core to support the direct drive motor and maintain stable rotation.

[0009] A further technical solution is that a mounting base plate is fixed to the bottom end of the shaft core, and the mounting base plate is used to fix the entire machine tool.

[0010] The beneficial effects of this utility model are: This utility model relates to an inverted direct-drive exchange worktable, which mounts two hydrostatic spindles in the middle of the shaft core axis. Compared to mounting them at the bottom, the direct-drive motor requires less driving force and centrifugal force. Therefore, it not only saves electricity and energy, but also ensures the rotational accuracy of the worktable after long-term use, reduces steering deviation, and guarantees product quality. The use of a direct-drive motor also results in a faster response speed. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings required for the work described in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the existing exchange workbench; Figure 2 This is a perspective view of an inverted direct-drive exchange worktable according to the present invention; Figure 3 This is a top view of an inverted direct-drive exchange worktable according to the present invention; Figure 4 This is a front view of an inverted direct-drive exchange worktable according to the present invention; Figure 5 This utility model Figure 4 A cross-sectional view along the AA direction; Figure 6 This is a schematic diagram of an inverted direct-drive exchange worktable for mounting workpieces according to this utility model; Figure 7 This is a schematic diagram of the inverted direct drive exchange workbench of this utility model in use.

[0013] Figure 1-7 In the middle: 1-direct drive motor, 2-support bearing, 3-hydrostatic spindle, 4-turntable bearing, 5-shaft core, 6-shaft sleeve, 7-mounting base plate, 8-motor base, 9-motor housing. Detailed Implementation

[0014] The preferred embodiments of this utility model will be described in detail below so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of this utility model.

[0015] See Figure 1-7 As shown, an inverted direct-drive exchange worktable includes a direct-drive motor 1, a shaft core 5, a turntable bearing 4, and a hydrostatic spindle 3. The shaft core 5 is rotatably connected to the direct-drive motor 1. There are two hydrostatic spindles 3, both of which are fixed to the direct-drive motor 1. The hydrostatic spindle 3 is located at the axial center of the shaft core 5. A bushing 6 is fixed at the bottom end of the hydrostatic spindle 3. The turntable bearing 4 is installed between the bushing 6 and the shaft core 5.

[0016] Two hydrostatic spindles 3 are provided, with their output ends facing opposite directions. Rotation allows for the replacement of workpieces or grinding wheels; alternatively, they can rotate together in the same direction. A motor mount 8 is connected to the lower end of the direct drive motor 1, and the hydrostatic spindle 3 is connected to the motor mount 8. The direct drive motor 1 and motor mount 8 are separate for easy installation and maintenance, but they can also be integrated. A support bearing 2 is installed between the motor mount 8 and the spindle core 5 to support the direct drive motor 1 and maintain stable rotation. A mounting base plate 7 is fixed to the bottom end of the spindle core 5, used to secure the entire machine tool.

[0017] In this embodiment, the direct drive motor 1 is started. Since the shaft core 5 is fixed on the mounting base plate 7, the shaft core 5 cannot rotate, causing the direct drive motor 1 to rotate. The rotation of the direct drive motor 1 drives the hydrostatic spindles 3 on the left and right sides to rotate to adjust the work position. The direct drive motor 1 is fixed to the motor base 8, the motor base 8 is fixed to the hydrostatic spindle 3, and the hydrostatic spindle 3 is fixed to the bushing 6 with bolts. The output end of the hydrostatic spindle 3 can be connected to a grinding wheel or a workpiece can be installed through bolts.

[0018] Among them, such as Figure 6 As shown, when the workpiece is mounted on two hydrostatic spindles 3, one spindle performs machining while the other spindles load and unload, resulting in higher automation efficiency. Figure 2 As shown, when grinding wheels are installed on the hydrostatic spindle 3, one grinding wheel grinds the thread, and the other grinding wheel grinds the outer circle or end face, etc., for composite machining. The direct drive motor 1 includes a stator, a rotor, and a motor housing 9. The rotor is installed and fixed inside the motor housing 9, while the stator is installed and fixed on the outer circumference of the top of the shaft core 5. There is a gap between the stator and the rotor. Since the shaft core 5 and the stator are fixed, the rotation of the motor housing 9 along with the rotor drives the rotation of the hydrostatic spindles 3 on both sides. The motor housing 9 is fixed to the motor base 8 by bolts.

[0019] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that are conceived without creative effort should be covered by the protection scope of this utility model.

Claims

1. An inverted direct-drive exchange worktable, characterized in that: It includes a direct drive motor, a shaft core, a turntable bearing, and a hydrostatic spindle. The shaft core is rotatably connected to the direct drive motor. There are two hydrostatic spindles, both of which are fixed to the direct drive motor. The hydrostatic spindle is located at the axial center of the shaft core. A bushing is fixed to the bottom end of the hydrostatic spindle. The turntable bearing is installed between the bushing and the shaft core.

2. The inverted direct-drive exchange workbench according to claim 1, characterized in that: The hydrostatic spindle has two spindles, and the output ends face opposite directions.

3. The inverted direct-drive exchange worktable according to claim 1, characterized in that: The lower end of the direct drive motor is connected to a motor mount, and the hydrostatic spindle is connected to the motor mount.

4. The inverted direct-drive exchange workbench according to claim 3, characterized in that: A support bearing is installed between the motor base and the shaft.

5. An inverted direct-drive exchange workbench according to claim 1, characterized in that: The bottom end of the shaft is fixed with a mounting base plate.

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