Cylindrical workpiece centering and positioning device

Abstract

The utility model relates to the technical field of automobile part manufacturing, and particularly discloses a cylindrical workpiece centering and positioning device. The cylindrical workpiece centering and positioning device comprises a base, a rotary table is rotationally arranged on the base, a positioning seat is connected to the rotary table, a lower positioning ring block and an upper positioning ring block located above the lower positioning ring block are connected to the positioning seat, and the central axis of the upper positioning ring block and the central axis of the lower positioning ring block are collinear with the rotating central axis of the rotary table; a positioning boss is arranged on the inner side of the lower positioning ring block in a protruding mode, a set of clamping jaws are arranged above the positioning boss in the annular direction at intervals, the clamping jaws can slide in the radial direction of the lower positioning ring block, and elastic pieces are arranged between the outer ends of the clamping jaws and the positioning base. And the turntable is connected with a turntable driving piece for driving the turntable to rotate. The cylindrical workpiece centering and positioning device can be compatible with centering and positioning of long cylindrical workpieces, and is high in positioning precision and high in applicability.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts manufacturing technology, and in particular to a cylindrical workpiece centering and positioning device. Background Technology

[0002] During the assembly of automotive parts such as motor stators, cylindrical workpieces such as connecting shafts need to be centered to ensure assembly accuracy.

[0003] Utility model patent CN212761156U discloses a lathe fixture with centering positioning, which makes the end face of the workpiece flush with the end face of the positioning sleeve and the end face of the centering positioning block. When flush, the error of the workpiece blank size is adjusted by spring, and then the workpiece is clamped by two jaws, thereby achieving centering positioning and clamping of the workpiece. However, this centering positioning structure is suitable for centering short cylindrical workpieces, but not suitable for precise centering of long cylindrical workpieces. Summary of the Invention

[0004] The purpose of this invention is to provide a cylindrical workpiece centering and positioning device that can center and position long cylindrical workpieces with high positioning accuracy and strong applicability.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A cylindrical workpiece centering and positioning device includes a base, a turntable rotatably mounted on the base, a positioning seat connected to the turntable, a lower positioning ring block and an upper positioning ring block located above the lower positioning ring block connected to the positioning seat, and the central axis of the upper positioning ring block and the central axis of the lower positioning ring block are both collinear with the rotation center axis of the turntable.

[0007] The lower positioning ring block has a positioning boss protruding on its inner side. A set of claws is arranged circumferentially above the positioning boss. The claws can slide radially along the lower positioning ring block, and an elastic element is provided between the outer end of the claws and the positioning seat.

[0008] The turntable is connected to a turntable drive unit that drives its rotation.

[0009] Furthermore, the upper positioning ring block includes an inner ring block and an outer ring block coaxially connected, and the inner diameter of the inner ring block is the same as the upper inner diameter of the lower positioning ring block.

[0010] Furthermore, the upper end of the inner hole of the inner ring block is trumpet-shaped.

[0011] Furthermore, the upper positioning ring block is detachably connected to the positioning seat, and several equal-height pads are provided between the upper positioning ring block and the positioning seat.

[0012] Furthermore, a window is provided on the side of the lower positioning ring block, and a first detection sensor for detecting cylindrical workpieces is installed at the window.

[0013] Furthermore, a mounting plate is provided below the turntable, and the mounting plate is connected to a locking assembly for locking the turntable; the locking assembly includes a pin and a limiting block with a second insertion hole, the limiting block being connected to the mounting plate; the pin can be vertically inserted into the second insertion hole opened on the turntable and into the second insertion hole.

[0014] Furthermore, a second detection sensor for detecting the pin is connected to the limiting block or the mounting plate.

[0015] Furthermore, the mounting plate is connected to a pin holder for placing the pin.

[0016] Furthermore, a positioning sensor is connected to the mounting plate, and a positioning plate for triggering the positioning sensor is connected to the turntable.

[0017] Furthermore, the turntable drive is an electrically controlled rotary table, and the turntable is coaxially connected to the rotating platform of the electrically controlled rotary table.

[0018] The beneficial effects of this utility model are as follows: The cylindrical workpiece centering positioning device of this utility model positions the lower end face of the cylindrical workpiece through the positioning boss. Under the elastic force of each elastic element, each gripper cooperates to clamp the cylindrical workpiece. Driven by the turntable drive, the turntable rotates, causing the positioning seat, upper positioning ring block, lower positioning ring block and the cylindrical workpiece held by the grippers to rotate together, thereby realizing the rotational centering positioning of the cylindrical workpiece. This cylindrical workpiece centering positioning device can be compatible with centering positioning of long cylindrical workpieces, with high positioning accuracy and strong applicability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a cylindrical workpiece centering and positioning device provided by this utility model.

[0020] Figure 2 yes Figure 1 A schematic diagram of the positioning seat, lower positioning ring block, and chuck in the middle. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] like Figures 1 to 2As shown, a cylindrical workpiece centering positioning device includes a base 1, a turntable 2 rotatably mounted on the base 1, a positioning seat 3 connected to the turntable 2, a lower positioning ring block 4 and an upper positioning ring block 5 located above the lower positioning ring block 4 connected to the positioning seat 3, the central axis of the upper positioning ring block 5 and the central axis of the lower positioning ring block 4 being collinear with the rotation center axis of the turntable 2; a positioning boss 41 protrudes from the inner side of the lower positioning ring block 4, a set of claws 6 are arranged circumferentially above the positioning boss 41, the claws 6 can slide radially along the lower positioning ring block 4, and an elastic element is provided between the outer end of the claws 6 and the positioning seat 3; the turntable 2 is connected to a turntable drive 7 for driving its rotation.

[0023] Specifically, such as Figure 1 As shown, the positioning base 3 includes an upper connecting plate 31 and a lower connecting plate 32 arranged parallel to each other. The upper connecting plate 31 and the lower connecting plate 32 are connected to a number of intermediate plates 33 distributed in a circumferential direction. The lower positioning ring block 4 is located between the intermediate plates 33 and is connected to the lower connecting plate 32. The upper positioning ring block 5 is connected to the upper connecting plate 31.

[0024] Furthermore, the upper positioning ring block 5 is detachably connected to the upper connecting plate 31, and several equal-height pads 8 are provided between the upper positioning ring block 5 and the upper connecting plate 31. In use, the appropriate equal-height pads 8 can be selected according to the length of the cylindrical workpiece.

[0025] In this embodiment, the upper positioning ring block 5 includes an inner ring block 51 and an outer ring block 52 coaxially connected, wherein the inner diameter of the inner ring block 51 is the same as the upper inner diameter of the lower positioning ring block 4. Further, the upper end of the inner hole of the inner ring block 51 is trumpet-shaped to facilitate the smooth entry of cylindrical workpieces into the inner hole of the inner ring block 51.

[0026] In this embodiment, a window is provided on the side of the lower positioning ring block 4, and a first detection sensor for detecting cylindrical workpieces is installed in the window.

[0027] In this embodiment, three grippers 6 are evenly spaced along the circumferential direction on the lower positioning ring block 4, and the elastic element at the outer end of the gripper 6 is preferably a spring pin. In use, under the elastic force of the three spring pins, the three grippers 6 clamp the cylindrical workpiece.

[0028] like Figure 1 As shown, a mounting plate 11 is provided below the turntable 2, and a locking assembly for locking the turntable 2 is connected to the mounting plate 11. The locking assembly includes a pin 91 and a limiting block 92 with a second insertion hole, and the limiting block 92 is connected to the mounting plate 11. The pin 91 can be vertically inserted into the first insertion hole and the second insertion hole on the turntable 2. Further, a pin holder 94 for placing the pin 91 is connected to the mounting plate 11. A second detection sensor 93 for detecting the pin 91 is connected to the limiting block 92 or the mounting plate 11.

[0029] When it is necessary to release the lock on turntable 2, simply pull out pin 91; the pulled-out pin 91 can be placed on pin holder 94. After the operation is completed, remove pin 91 from pin holder 94 and insert pin 91 into the first and second sockets to lock turntable 2.

[0030] In this embodiment, a positioning sensor 12 is connected to the mounting plate 11, and a positioning plate 21 for triggering the positioning sensor 12 is connected to the turntable 2. When the positioning plate 21 triggers the positioning sensor 12, the turntable 2 stops rotating, and at this time, the first socket is exactly above the second socket.

[0031] In this embodiment, the turntable drive 7 is preferably an electrically controlled rotary table, and the turntable 2 is coaxially connected to the rotating platform of the electrically controlled rotary table. The electrically controlled rotary table can be a product from the MISUMI RMWG series.

[0032] This utility model discloses a cylindrical workpiece centering positioning device. In use, the lower end face of the cylindrical workpiece is positioned by the positioning boss 41. Under the elastic force of each elastic element, the grippers 6 cooperate to clamp the cylindrical workpiece. Driven by the turntable drive 7, the turntable 2 rotates, causing the positioning seat 3, upper positioning ring block 5, lower positioning ring block 4, and the cylindrical workpiece held by the grippers 6 to rotate together, thereby achieving rotational centering positioning of the cylindrical workpiece. After the turntable 2 stops rotating, the cylindrical workpiece can be removed. This cylindrical workpiece centering positioning device is compatible with centering long cylindrical workpieces, has high positioning accuracy, and is highly applicable.

[0033] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A device for centering and positioning a cylindrical workpiece, characterized in that, Includes a base (1), on which a turntable (2) is rotatably mounted, and a positioning seat (3) is connected to the turntable (2). The positioning seat (3) is connected to a lower positioning ring block (4) and an upper positioning ring block (5) located above the lower positioning ring block (4). The central axis of the upper positioning ring block (5) and the central axis of the lower positioning ring block (4) are both collinear with the rotation center axis of the turntable (2). The lower positioning ring block (4) has a positioning boss (41) protruding on its inner side. A set of claws (6) are arranged circumferentially above the positioning boss (41). The claws (6) can slide radially along the lower positioning ring block (4), and an elastic element is provided between the outer end of the claws (6) and the positioning seat (3). The turntable (2) is connected to a turntable drive unit (7) that drives its rotation.

2. The cylindrical workpiece centering and positioning device according to claim 1, characterized in that, The upper positioning ring block (5) includes an inner ring block (51) and an outer ring block (52) connected coaxially. The inner diameter of the inner ring block (51) is the same as the upper inner diameter of the lower positioning ring block (4).

3. The cylindrical workpiece centering and positioning device according to claim 2, characterized in that, The upper end of the inner hole of the inner ring block (51) is trumpet-shaped.

4. The cylindrical workpiece centering and positioning device according to claim 1, characterized in that, The upper positioning ring block (5) is detachably connected to the positioning seat (3), and a number of equal-height pads (8) are provided between the upper positioning ring block (5) and the positioning seat (3).

5. The cylindrical workpiece centering and positioning device according to claim 1, characterized in that, The lower positioning ring block (4) has a window on its side, and a first detection sensor for detecting cylindrical workpieces is installed at the window.

6. The cylindrical workpiece centering and positioning device according to claim 1, characterized in that, A mounting plate (11) is provided below the turntable (2), and the mounting plate (11) is connected to a locking assembly for locking the turntable (2); the locking assembly includes a pin (91) and a limiting block (92) with a second insertion hole, the limiting block (92) being connected to the mounting plate (11); the pin (91) can be vertically inserted into the second insertion hole opened on the turntable (2) and into the second insertion hole.

7. The cylindrical workpiece centering and positioning device according to claim 6, characterized in that, A second detection sensor (93) for detecting the pin (91) is connected to the limiting block (92) or the mounting plate (11).

8. A cylindrical workpiece centering and positioning device according to claim 6, characterized in that, The mounting plate (11) is connected to a pin holder (94) for placing the pin (91).

9. A cylindrical workpiece centering and positioning device according to claim 6, characterized in that, A positioning sensor (12) is connected to the mounting plate (11), and a positioning plate (21) for triggering the positioning sensor (12) is connected to the turntable (2).

10. A cylindrical workpiece centering and positioning device according to claim 1, characterized in that, The turntable drive (7) is an electrically controlled rotary table, and the turntable (2) is coaxially connected to the rotating platform of the electrically controlled rotary table.

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