A device for improving positioning accuracy of a rotary table structure

Abstract

The utility model discloses a device that improves positioning accuracy of rotary table structure, include: rotating mechanism, set up on the rotary table of rotating mechanism output, along the rotary table circumference interval arrangement's multiple jigs, set up multiple product positioning mechanism under the rotary table, rotating mechanism is used for driving rotary table rotation, and the product on the jig is sent to the product positioning mechanism and is positioned, every product positioning mechanism all includes jacking mechanism, with the jacking mechanism output end connection's jacking plate, set up in the both sides of jacking plate's two clamping components, set up product front and rear positioning spare and product left and right positioning spare on the jacking plate, every clamping component all includes the mechanism of clamping that sets up in the output of pull mechanism, pull mechanism.

Description

Technical Field

[0001] This utility model relates to the field of automation equipment technology, and in particular to a device for improving the positioning accuracy of a turntable structure. Background Technology

[0002] The existing turntable structure of automated equipment involves placing the product to be positioned onto a fixture, then assembling the fixture onto the turntable. This introduces tolerances between the product and the fixture, machining tolerances for the fixture, assembly tolerances for the fixture onto the turntable, and machining tolerances for the turntable itself. The final positioning tolerance of the product equals the cumulative effect of all these tolerances, resulting in a large positioning tolerance and poor positional consistency among the products on the turntable. This fails to meet the high precision requirements of applications and necessitates further improvement. Utility Model Content

[0003] In view of the problems existing in the prior art, this utility model provides a device to improve the positioning accuracy of a turntable structure.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] This utility model provides a device for improving the positioning accuracy of a turntable structure, comprising: a rotating mechanism, a turntable disposed on the output end of the rotating mechanism, a plurality of fixtures spaced apart along the circumference of the turntable, and a plurality of product positioning mechanisms disposed below the turntable;

[0006] The rotating mechanism is used to drive the turntable to rotate, and to send the product on the fixture to the product positioning mechanism for positioning.

[0007] Each of the product positioning mechanisms includes a lifting mechanism, a lifting plate connected to the output end of the lifting mechanism, two clamping assemblies disposed on both sides of the lifting plate, and product front and rear positioning components and product left and right positioning components disposed on the lifting plate;

[0008] Each of the clamping assemblies includes a pull-down mechanism and a clamping mechanism disposed at the output end of the pull-down mechanism.

[0009] Preferably, the rotating mechanism includes a drive motor and a cam divider connected to the output end of the drive motor; the turntable is disposed on the output end of the cam divider.

[0010] Preferably, the lifting mechanism includes a fixed base and a lifting cylinder mounted on the fixed base.

[0011] Preferably, the two clamping assemblies are arranged on both sides of the lifting cylinder and positioned below both sides of the lifting plate.

[0012] Preferably, the pull-down mechanism includes a pull-down cylinder.

[0013] Preferably, the clamping mechanism includes a clamping cylinder and a gripper disposed at the output end of the clamping cylinder.

[0014] Preferably, the product front and rear positioning components include a first positioning pin, a first spring, and a first bushing; the first positioning pin passes through the lifting plate, and its head is opposite to the positioning holes on the front and rear sides of the product; the first positioning pin passes through the lifting plate, the first spring is sleeved on the first positioning pin, the first bushing is sleeved on the first spring, and its head abuts against the upper surface of the lifting plate.

[0015] Preferably, the left and right positioning components of the product include a second positioning pin, a second spring, and a second bushing; the second positioning pin passes through the lifting plate, the second spring is sleeved on the second positioning pin, and its head is opposite to the positioning opening on the product; the second bushing is sleeved on the second spring, and its head abuts against the upper surface of the lifting plate.

[0016] Preferably, the turntable has multiple spaced notches, and fixtures are installed on both sides of each notch.

[0017] Preferably, the fixture is detachably mounted on the turntable, and the fixture has a groove for placing the product.

[0018] The technical solution of this utility model has the following beneficial effects:

[0019] This invention features a product positioning mechanism located beneath the turntable. After the product is conveyed to this mechanism, a lifting plate lifts the product away from the fixture. The product is then flexibly clamped by the combined action of the clamping assembly's pull-down mechanism and the clamping mechanism. A three-coordinate positioning reference is established using the product's front and rear positioning components and left and right positioning components. This effectively eliminates the cumulative effects of fit tolerances, machining tolerances, and assembly tolerances between the product and the fixture, and between the fixture and the turntable. This significantly improves the product's positioning accuracy and positional consistency, meeting high-precision requirements. Furthermore, the device is compact, reliable, and easy to maintain, offering excellent practicality and economy.

[0020] This invention utilizes a combination of a drive motor and a cam divider in its rotating mechanism to achieve intermittent, precise rotation of the turntable, improving the stability of product transport and avoiding positioning deviations caused by continuous rotation. The product positioning mechanism of this invention includes a lifting plate, a clamping assembly, and front, rear, left, and right positioning components. It can quickly establish a three-coordinate positioning reference after the product is removed from the fixture, ensuring positioning accuracy down to the micrometer level, making it suitable for precision assembly or testing scenarios. The pull-down mechanism of the clamping assembly works in conjunction with the clamping mechanism to provide flexible clamping, avoiding damage to the product and improving the reliability of the positioning process. The positioning components of this invention incorporate an elastic structure of springs and bushings, buffering positioning impacts and improving the durability and adaptability of the device, enabling it to handle products of different sizes or shapes. Attached Figure Description

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

[0022] Figure 2 This is a schematic diagram of the product positioning mechanism of this utility model. Figure 1 ;

[0023] Figure 3 This is a schematic diagram of the product positioning mechanism of this utility model. Figure 2 . Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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.

[0026] 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.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of 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.

[0028] In this utility model, unless otherwise expressly specified and limited, the first feature is "on" or "on" the second feature.

[0029] The term "below" can include situations where the first and second features are in direct contact, or situations where the first and second features are in contact through another feature between them. Furthermore, "above," "over," and "on top" of the first feature above the second feature includes situations where the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of the first feature below the second feature includes situations where the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] Reference Figures 1 to 3 This utility model provides a device for improving the positioning accuracy of a turntable structure, comprising: a rotating mechanism 1, a turntable 2 disposed on the output end of the rotating mechanism 1, a plurality of fixtures 3 disposed at intervals along the circumference of the turntable 2, and a plurality of product positioning mechanisms 4 disposed below the turntable 2;

[0031] The rotating mechanism 1 drives the turntable 2 to rotate, delivering the product 20 from the fixture 3 to the product positioning mechanism 4 for positioning. Specifically, the rotating mechanism 1 includes a drive motor and a cam divider connected to the output end of the drive motor. The turntable 2 is positioned on the output end of the cam divider. The drive motor provides power, enabling the turntable 2 to rotate intermittently via the cam divider, ensuring that the turntable 2 stops at a preset angle, thereby accurately delivering the product 20 from the fixture 3 to the corresponding product positioning mechanism 4. This design improves the rotational accuracy and stability of the turntable 2, avoiding positioning deviations that may result from continuous rotation.

[0032] Each of the product positioning mechanisms 4 includes a lifting mechanism 40, a lifting plate 41 connected to the output end of the lifting mechanism 40, two clamping assemblies 42 disposed on both sides of the lifting plate 41, and product front and rear positioning members 43 and product left and right positioning members 44 disposed on the lifting plate 41. The lifting mechanism 40 includes a fixed base and a lifting cylinder mounted on the fixed base. The lifting cylinder drives the lifting plate 41 to rise vertically, lifting the product 20 to detach it from the fixture 3, thereby providing space for subsequent positioning operations. The two clamping assemblies 42 are arranged on both sides of the lifting cylinder and positioned below both sides of the lifting plate 41 to ensure that they do not interfere with the movement of the product 20 during the lifting process.

[0033] Each clamping assembly 42 includes a pull-down mechanism 420 and a clamping mechanism 421 disposed at the output end of the pull-down mechanism 420; wherein, the pull-down mechanism 420 includes a pull-down cylinder for driving the clamping mechanism 421 to pull the product 20 down so that it is tightly attached to the lifting plate 41; the clamping mechanism 421 includes a clamping cylinder and a gripper disposed at the output end of the clamping cylinder, which clamps the product 20 from both sides under the drive of the clamping cylinder to achieve initial fixation of the product.

[0034] The product front and rear positioning component 43 includes a first positioning pin 431, a first spring 432, and a first bushing 433. The first positioning pin 431 passes through the lifting plate 41, and its head is opposite to the positioning holes 21 on the front and rear sides of the product 20, for insertion into the positioning holes 21 of the product 20 to achieve precise positioning in the front and rear direction. The first spring 432 is sleeved on the first positioning pin 431 to provide elastic cushioning and prevent damage to the product 20 during positioning. The first bushing 433 is sleeved on the first spring 432, and its head abuts against the upper surface of the lifting plate 41 to ensure the stability and durability of the entire positioning component.

[0035] The left and right positioning components 44 include a second positioning pin, a second spring, and a second bushing. The second positioning pin passes through the lifting plate 41, with its head facing the positioning port 22 on the product 20, and is used to insert into the positioning port to achieve precise positioning in the left and right directions. The second spring is sleeved on the second positioning pin to provide elastic support; the second bushing is sleeved on the second spring, with its head abutting against the upper surface of the lifting plate 41, similar to the front and rear positioning components 43, to ensure the stability and accuracy of the positioning process.

[0036] Furthermore, the turntable 2 has multiple spaced notches 201, and fixtures 3 are installed on both sides of each notch 201. The fixtures 3 are detachably mounted on the turntable 2, for example, by screws, for easy disassembly and replacement. The fixtures 3 have grooves inside for placing the product 20, ensuring that the product 20 remains stable during the rotation of the turntable 2.

[0037] The working principle of this utility model is as follows:

[0038] First, the drive motor of the rotating mechanism 1 starts, driving the turntable 2 to rotate via the cam divider, transporting the fixture 3 containing the product 20 to below the product positioning mechanism 4. Then, the lifting cylinder drives the lifting plate 41 to rise, lifting the product 20 away from the fixture 3. Simultaneously, the pull-down cylinder drives the clamping mechanism 421 to pull the product 20 downwards, making it fit tightly against the lifting plate 41, while the clamping cylinder drives the grippers to clamp the product 20 from both sides. Based on this, the first positioning pins of the front and rear positioning components 43 are inserted into the positioning holes 21 at the front and rear of the product 20, and the second positioning pins of the left and right positioning components 44 are inserted into the left and right positioning ports 22 of the product 20. Under the combined action of the clamping mechanism 421, the front and rear positioning components 43, and the left and right positioning components 44, a three-coordinate positioning reference for the product 20 is established, achieving high-precision positioning.

[0039] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A device for improving the positioning accuracy of a turntable structure, characterized in that, include: A rotating mechanism, a turntable mounted on the output end of the rotating mechanism, multiple fixtures spaced apart along the circumference of the turntable, and multiple product positioning mechanisms mounted below the turntable; The rotating mechanism is used to drive the turntable to rotate, and to send the product on the fixture to the product positioning mechanism for positioning. Each of the product positioning mechanisms includes a lifting mechanism, a lifting plate connected to the output end of the lifting mechanism, two clamping assemblies disposed on both sides of the lifting plate, and product front and rear positioning components and product left and right positioning components disposed on the lifting plate; Each of the clamping assemblies includes a pull-down mechanism and a clamping mechanism disposed at the output end of the pull-down mechanism.

2. The device for improving the positioning accuracy of a turntable structure according to claim 1, characterized in that, The rotating mechanism includes a drive motor and a cam divider connected to the output end of the drive motor; the turntable is disposed on the output end of the cam divider.

3. The device for improving the positioning accuracy of a turntable structure according to claim 1, characterized in that, The lifting mechanism includes a fixed base and a lifting cylinder mounted on the fixed base.

4. The device for improving the positioning accuracy of a turntable structure according to claim 3, characterized in that, The two clamping assemblies are arranged on both sides of the lifting cylinder and positioned below both sides of the lifting plate.

5. The device for improving the positioning accuracy of a turntable structure according to claim 1, characterized in that, The pull-down mechanism includes a pull-down cylinder.

6. The device for improving the positioning accuracy of a turntable structure according to claim 1, characterized in that, The clamping mechanism includes a clamping cylinder and a gripper located at the output end of the clamping cylinder.

7. The device for improving the positioning accuracy of a turntable structure according to claim 1, characterized in that, The product front and rear positioning components include a first positioning pin, a first spring, and a first bushing; the first positioning pin passes through the lifting plate; the first spring is sleeved on the first positioning pin, the first bushing is sleeved on the first spring, and its head abuts against the upper surface of the lifting plate.

8. The device for improving the positioning accuracy of a turntable structure according to claim 1, characterized in that, The left and right positioning components of the product include a second positioning pin, a second spring, and a second bushing; the second positioning pin passes through the lifting plate, and the second spring is sleeved on the second positioning pin; the second bushing is sleeved on the second spring, and its head abuts against the upper surface of the lifting plate.

9. The device for improving the positioning accuracy of a turntable structure according to claim 2, characterized in that, The turntable has multiple spaced notches, and fixtures are installed on both sides of each notch.

10. The device for improving the positioning accuracy of a turntable structure according to claim 9, characterized in that, The fixture is detachably mounted on the turntable, and a groove is provided inside the fixture for placing the product.

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