Double-workbench floating positioning mechanism

Abstract

The present invention belongs to the field of mechanical equipment and relates to a double-workbench floating positioning mechanism, which includes an oil cylinder base fixedly connected to the bed base. A positioning seat is fixedly installed at the upper end of the oil cylinder base, and a piston rod is also fitted and installed inside the oil cylinder base; a rotating shaft is fixedly installed at one end of the piston rod away from the oil cylinder base, and a face ball bearing is sleeved on the rotating shaft. One end of the face ball bearing away from the rotating shaft is connected to a support shaft through a fastener. A thrust ball bearing is arranged at one end of the support shaft away from the face ball bearing, and the thrust ball bearing is connected to a positioning adapter plate connected to the turntable; a positioning sleeve is fixedly installed at one end of the positioning seat away from the oil cylinder base; the present invention is used to realize the floating of the double-workbench machine tool during position conversion and the positioning after position conversion. It has a simple structure, high positioning accuracy, good stability and reliability, achieving the purpose of being fast and stable during rotation, having high positioning accuracy and good consistency during processing.

Description

Technical Field

[0001] The present invention belongs to the field of mechanical equipment and relates to a double-workbench floating positioning mechanism. Background Art

[0002] At present, most machine tools on the market adopt a single workbench, such as ordinary gear grinding machines, hobbing machines, etc. Since during the machining process, actions such as clamping and tool setting are required for each workpiece before machining, the auxiliary time is relatively long, and it can no longer fully meet the high-efficiency requirements of users for machining machine tools. For a double-workbench machine tool, while machining at one work station, the workpiece at the other work station can be installed and gear-aligned. After the previous workpiece is machined, only a return and position change are needed to machine the next workpiece, which greatly reduces the auxiliary time and improves the production efficiency. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a double-workbench floating positioning mechanism, which is used to realize the floating during the position change of the double-workbench machine tool and the positioning after the position change, and solve the key technical problems of being fast and stable during rotation, having high positioning accuracy and good consistency during machining.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A double-workbench floating positioning mechanism is installed on the bed base of the machine tool. A turntable is correspondingly arranged on the machine tool bed at one end of the machine tool far from the bed base. A rotary drive mechanism is installed on the turntable, including an oil cylinder base fixedly connected to the bed base. A positioning seat is fixedly installed at the upper end of the oil cylinder base. A piston rod is also correspondingly installed inside the oil cylinder base. The oil cylinder base, the positioning seat, and the piston rod are assembled into a closed oil cylinder;

[0005] A rotating shaft is fixedly installed at one end of the piston rod far from the oil cylinder base. A face ball bearing is sleeved on the rotating shaft. At one end of the face ball bearing far from the rotating shaft, a support shaft is connected through a fastener. A thrust ball bearing is arranged at one end of the support shaft far from the face ball bearing. The thrust ball bearing is connected to a positioning adapter plate, and the positioning adapter plate is fixedly connected to the turntable;

[0006] A positioning sleeve is also fixedly installed at one end of the positioning seat far from the oil cylinder base.

[0007] Optionally, a rotating sleeve is also connected at one end of the positioning adapter plate close to the support shaft. The rotating sleeve and the positioning adapter plate are connected to the turntable correspondingly through screws.

[0008] Optionally, a cylindrical roller bearing and a self-lubricating bearing are arranged between the rotating sleeve and the support shaft.

[0009] Optionally, the rotating sleeve and the positioning sleeve are correspondingly arranged, and a self-lubricating bearing is arranged between the positioning sleeve and the rotating sleeve.

[0010] Optionally, a sealing plug, a sealing ring and a plug are fitted inside the oil cylinder, and a pipe joint for oil inlet and outlet and a pressure measuring joint for measuring oil pressure are also provided.

[0011] Optionally, symmetric through holes for installing a rotating shaft are formed at one end of the piston rod close to the end face ball bearing. The rotating shaft is clamped in the symmetric through holes, and snap rings are fitted at both ends.

[0012] Optionally, the end face ball bearing is connected to the support shaft through a locking nut. A positioning nut and an anti-rotation screw are also installed at one end of the support shaft close to the locking nut to prevent the up-and-down position from changing during movement.

[0013] Optionally, a lower end gear disk is installed on the end face of the machine tool bed away from the base of the machine tool, and an upper end gear disk is installed on the end face of the turntable close to the machine tool bed. The upper end gear disk and the lower end gear disk are arranged in a matching manner.

[0014] The beneficial effects of the present invention are as follows:

[0015] The double-workbench floating positioning mechanism of the present invention is used to realize the floating during the transposition of the double-workbench machine tool and the positioning after transposition. Its structure is simple, the positioning accuracy is high, the stability and reliability are very good, and the key objectives of fast and stable rotation, high positioning accuracy and good consistency during processing are achieved.

[0016] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail preferably with reference to the accompanying drawings, wherein:

[0018] Figure 1 is the front view of the double-workbench floating positioning mechanism of the present invention;

[0019] Figure 2 is the side view of the double-workbench floating positioning mechanism of the present invention.

[0020] Reference numerals: oil cylinder base 1, piston rod 2, positioning seat 3, positioning sleeve 4, support shaft 5, slewing sleeve 6, positioning adapter plate 7, positioning nut 8, anti-rotation screw 9, end face ball bearing 10, pressure measuring joint 11, pipe joint 12, plug 13, sealing plug 14, rotating shaft 15, locking nut 16, cylindrical roller bearing 17, thrust ball bearing 18, lower end gear disk 19, upper end gear disk 20, sealing ring 21, snap ring 22, self-lubricating bearing 23, turntable 24. Detailed implementation mode

[0021] The following uses specific specific examples to illustrate the implementation mode of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0022] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation on the present invention; in order to better illustrate the embodiments of the present invention, some components and structures in the drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0023] In the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and should not be construed as a limitation on the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0024] Please refer to Figures 1 to 2, it is a double-workbench floating positioning mechanism, installed on the bed base of the machine tool. At one end of the machine tool far from the bed base, a turntable 24 is arranged on the machine tool bed in a matching manner. A rotary drive mechanism is installed on the turntable 24. On the end face of the machine tool bed far from the base of the machine tool, a lower end gear disk 19 is arranged. On the end face of the turntable 24 close to the machine tool bed, an upper end gear disk 20 is arranged. The upper end gear disk 20 is arranged in a matching manner with the lower end gear disk 19. It includes an oil cylinder base 1 fixedly connected to the bed base. A positioning seat 3 is fixedly installed at the upper end of the oil cylinder base 1. A piston rod 2 is also installed in the oil cylinder base 1 in a matching manner. The piston rod 2 passes through the positioning seat 3, and the oil cylinder base 1, the positioning seat 3, and the piston rod 2 are assembled into a closed oil cylinder. Different specifications of sealing plugs 14, sealing rings 21, and plugs 13 are installed in the oil cylinder in a matching manner. A pipe joint 12 for oil inlet and outlet and a pressure measuring joint 11 for measuring oil pressure are also provided; on one end of the piston rod 2 close to the end face ball bearing 10, symmetric through holes for installing a rotating shaft 15 are opened. The rotating shaft 15 is clamped in the symmetric through holes, and snap rings 22 are installed at both ends in a matching manner; a face ball bearing 10 is sleeved on the rotating shaft 15. One end of the face ball bearing 10 far from the rotating shaft 15 is connected to a support shaft 5. The position of the overall mechanism's lifting and pulling down can be adjusted by screwing in the depth of the threaded end of the face ball bearing 10 to ensure that the upper and lower end gear disks are meshed in place and tightened during positioning; after adjustment, the position is fixed by a locking nut 16. At the same time, the movable ball head of the face ball bearing 10 ensures that the assembly connection between the piston rod 2 and the support shaft 5 is easy and no lateral force is generated. A positioning nut 8 and an anti-rotation screw 9 are also installed on one end of the support shaft 5 close to the locking nut 16 to prevent the upper and lower positions from changing during the movement process; a thrust ball bearing 18 is arranged at one end of the support shaft 5 far from the face ball bearing 10 to bear the gravity of the turntable 24 and ensure easy and flexible rotation. The thrust ball bearing 18 is connected to a positioning adapter plate 7, and the positioning adapter plate 7 is fixedly connected to the turntable 24; a positioning sleeve 4 is also fixedly installed at one end of the positioning seat 3 far from the oil cylinder base 1. A rotary sleeve 6 is also connected to one end of the positioning adapter plate 7 close to the support shaft 5. The rotary sleeve 6 and the positioning adapter plate 7 are connected to the turntable 24 by screws in a matching manner.

[0025] In this embodiment, a cylindrical roller bearing 17 and a self-lubricating bearing 23 are arranged between the rotary sleeve 6 and the support shaft 5. The rotary sleeve 6 is arranged in a matching manner with the positioning sleeve 4, and a self-lubricating bearing 23 is arranged between the positioning sleeve 4 and the rotary sleeve 6 for radial positioning to ensure that the turntable 24 will not be deflected after floating and can rotate easily and flexibly.

[0026] When the present invention needs to be transposed, the oil cylinder pushes the support shaft 5 to rise through the piston rod 2, thereby lifting the entire turntable 24, separating the upper gear disk 20 from the lower gear disk 19. The rotary drive mechanism with a servo motor above the turntable 24 then rotates the turntable 24, and the two worktables on the turntable 24 complete the transposition. Then the oil cylinder is depressurized, the entire turntable 24 descends, the upper and lower gear disks are engaged in place, and the oil cylinder then tightens the turntable by hydraulic pressure through the piston rod to complete the positioning and enhance the rigidity. The indexing accuracy of the high-precision end face gear disk can reach within ±3″, and the repeat positioning accuracy can reach within ±1″, thus reliably ensuring the machining accuracy consistency of the two worktables.

[0027] The present invention is used to achieve the floating during transposition and the positioning after transposition of a double-worktable machine tool. It has a simple structure, high positioning accuracy, very good stability and reliability, and achieves the key objectives of fast and stable rotation, high accuracy during machining, and good consistency.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. The double-workbench floating positioning mechanism is installed on the bed base of the machine tool. At one end of the machine tool far from the bed base, a turntable is arranged on the machine tool bed in a matching manner, and a rotary drive mechanism is installed on the turntable. It is characterized in that: It includes an oil cylinder base fixedly connected to the bed base. A positioning seat is fixedly installed at the upper end of the oil cylinder base. A piston rod is also fitted inside the oil cylinder base. The oil cylinder base, the positioning seat, and the piston rod are assembled into a closed oil cylinder. A rotating shaft is fixedly installed at the end of the piston rod far from the oil cylinder base. An end face ball bearing is sleeved on the rotating shaft. The end of the end face ball bearing far from the rotating shaft is connected to a support shaft through a fastener. A thrust ball bearing is arranged at the end of the support shaft far from the end face ball bearing. The thrust ball bearing is connected to a positioning adapter plate, and the positioning adapter plate is fixedly connected to the turntable. A positioning sleeve is also fixedly installed at the end of the positioning seat far from the oil cylinder base. A rotating sleeve is also connected at the end of the positioning adapter plate close to the support shaft. The rotating sleeve and the positioning adapter plate are connected to the turntable in a matching manner through screws. A cylindrical roller bearing and a self-lubricating bearing are arranged between the rotating sleeve and the support shaft. The rotating sleeve and the positioning sleeve are arranged in a matching manner, and a self-lubricating bearing is arranged between the positioning sleeve and the rotating sleeve.

2. The double-workbench floating positioning mechanism according to claim 1, characterized in that: A sealing plug, a sealing ring, and a plug are fitted inside the oil cylinder. A pipe joint for oil inlet and outlet and a pressure measuring joint for measuring oil pressure are also provided.

3. A double-workbench floating positioning mechanism according to claim 1, characterized in that: Symmetric through holes for installing the rotating shaft are opened at the end of the piston rod close to the end face ball bearing. The rotating shaft is clamped in the symmetric through holes, and snap rings are fitted at both ends.

4. A double-workbench floating positioning mechanism according to claim 1, characterized in that: The end face ball bearing is connected to the support shaft through a locking nut. A positioning nut and an anti-rotation screw are also installed at the end of the support shaft close to the locking nut to prevent the up and down position from changing during movement.

5. A double-workbench floating positioning mechanism according to claim 1, characterized in that: A lower end gear disc is installed on the end face of the machine tool bed far from the base of the machine tool. An upper end gear disc is installed on the end face of the turntable close to the machine tool bed. The upper end gear disc and the lower end gear disc are arranged in a matching manner for positioning after the turntable rotates into place.

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