A turntable positioning device

Abstract

A turntable positioning device includes a base structure, a drive mechanism, a turntable assembly, and a positioning assembly. The base structure is a supporting frame with a central hole in its central area for the turntable assembly to rotate and engage. The turntable assembly includes a turntable body, which is rotatably mounted on the base structure via a central shaft passing through the central hole and forming a rotatable engagement with the base structure. The upper surface of the turntable body has a workpiece mounting hole for mounting the workpiece to be processed. The drive mechanism includes a drive motor mounted on the base structure, the output end of which is connected to the turntable assembly via a linkage transmission assembly. The positioning assembly includes a fixed positioning block mounted on the base structure, a positioning pin seat located on one side of the turntable assembly, a positioning pin slidably disposed inside the positioning pin seat, and an elastic reset mechanism for providing pre-tightening reset force for the positioning pin. This invention achieves high-precision positioning and reliable locking of the turntable while also being easy to operate.

Description

Technical Field

[0001] This utility model relates to a turntable positioning device. Background Technology

[0002] Rotary tables, as core components for workpiece angle indexing, rotary machining, or inspection positioning, are widely used in industrial systems such as CNC machine tools, automated assembly lines, and photoelectric inspection platforms. Traditional rotary table driving and positioning methods mainly include the following categories:

[0003] Manual or electric rotation, manual alignment: Some low-end equipment uses a manual crank or simple electric mechanism to drive the turntable to rotate, and the operator manually aligns and locks it using a ruler or limit structure. This method is inefficient, prone to errors, and highly dependent on manual operation, making it unsuitable for high-precision automation scenarios.

[0004] Gear indexing + chuck locking structure: Some devices use a gear or ratchet indexing system in conjunction with mechanical chucks for position fixing. This structure usually relies on the mechanical meshing accuracy, has high requirements for gear machining and assembly, is prone to backlash accumulation after wear, has poor positioning repeatability, and lacks structural rigidity, making it easy to produce slight angular deviations during operation.

[0005] In summary, the technical background section of this utility model aims to describe the current state of the existing technical field. The deficiencies of the prior art indicate that the content of this section will provide necessary background information for understanding the technical contributions and innovations of this utility model. The signals disclosed in this background section are only intended to enhance the understanding of the overall background of this utility model and should not be regarded as implying any subjective intent in any form. Utility Model Content

[0006] In view of the above, the purpose of this utility model is to provide a turntable positioning device.

[0007] The technical solution adopted to achieve the purpose of this utility model is a turntable positioning device, including a base structure, a drive mechanism, a turntable assembly, and a positioning assembly.

[0008] The base structure is a support frame, the upper surface of which is used to install the drive mechanism and positioning components, and a central hole is provided in the central area for the rotational engagement of the turntable assembly.

[0009] The turntable assembly includes a turntable body, which is rotatably mounted on a base structure via a central rotating shaft. The central rotating shaft passes through a central hole and forms a rotatable connection with the base structure. The upper surface of the turntable body is provided with a workpiece mounting hole for mounting the workpiece to be processed.

[0010] The drive mechanism includes a drive motor mounted on the base structure. The output end of the drive motor is connected to the turntable assembly through a linkage transmission component. The linkage transmission component includes a drive gear mounted on the output end of the drive motor and an annular gear ring meshing with it. The annular gear ring is fixed to the lower surface of the turntable body. The rotation of the drive motor drives the drive gear to rotate, and then drives the turntable assembly to rotate around the central axis through gear meshing, thereby realizing the angle adjustment of the turntable.

[0011] The positioning assembly includes a fixed positioning block mounted on the base structure, a positioning pin seat located on one side of the turntable assembly, a positioning pin slidably disposed inside the positioning pin seat, and an elastic reset mechanism for providing pre-tightening reset force for the positioning pin. The fixed positioning block is fixedly connected to the base structure and extends towards the turntable assembly, with multiple spaced positioning holes along its circumferential direction. The positioning pin seat is a structure fixedly connected to the side edge of the turntable assembly, with a guide cavity at one end for slidably accommodating the positioning pin. The guide cavity is axially oriented towards the fixed positioning block. The positioning pin has a columnar structure, with one end being... The insertion end is the force-bearing end, and the other end is the force-receiving end. The insertion end faces the fixed positioning block. The elastic reset mechanism is located between the positioning pin and the positioning pin seat. It is used to push the positioning pin into the corresponding positioning hole when the turntable assembly rotates to the position aligned with the positioning hole on the fixed positioning block, thereby achieving precise angular positioning of the turntable. The elastic reset mechanism includes an elastic element located inside the guide cavity. When the positioning pin is not aligned with the positioning hole, the elastic element is in a compressed state. After the turntable assembly rotates to the position, the positioning pin automatically springs into the positioning hole under the action of elastic force to complete the positioning and prevent the turntable from rotating or shifting further.

[0012] Furthermore, the drive gear in the linkage transmission assembly is coaxially connected to the output shaft end of the drive motor, and the ring gear is fixedly set on the outer edge of the lower surface of the turntable assembly. The drive gear and the ring gear are meshed and connected in the horizontal direction. After the drive motor starts, it drives the drive gear to rotate, thereby realizing the rotation of the turntable assembly through meshing transmission.

[0013] Furthermore, the positioning pin seat is fixedly installed below or on the side of the turntable assembly, and its internal guide cavity is a through hole structure arranged along the sliding direction of the positioning pin. The inner wall of the guide cavity and the outer wall of the positioning pin form a sliding relationship to ensure that the positioning pin moves linearly along the guide direction under the action of the elastic reset mechanism.

[0014] Furthermore, the number of positioning holes on the fixed positioning block corresponds to the number of workstations that the turntable needs to be positioned, and they are arranged at equal angular intervals on the circumferential trajectory of the turntable's rotation. The center line of each positioning hole matches the insertion direction of the positioning pin set on the turntable, ensuring that at any target position, the positioning pin can be smoothly inserted into the corresponding positioning hole after the turntable is rotated and aligned, thus achieving high-precision repeatable positioning of multi-angle workstations.

[0015] The beneficial effects of this utility model are:

[0016] High-precision angular positioning capability: By setting angularly arranged positioning holes on the base structure and aligning positioning pins on the turntable assembly, combined with the automatic pushing action of the elastic reset mechanism, high-precision angular positioning of the turntable between different workstations is achieved. This structure effectively eliminates positional offsets caused by gear meshing backlash, transmission errors, or inertial motion, improving the repeatability of the equipment.

[0017] The separation of the drive and positioning structures facilitates maintenance and debugging: the drive mechanism achieves turntable rotation through gears and gear rings, while the positioning component completes position locking through a mechanical structure. The two are relatively independent but work together, reducing the failure rate caused by system complexity, and facilitating independent maintenance and debugging of each subsystem. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of 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.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a top view of the present invention;

[0021] In the figure, 101-base structure, 102-turntable assembly, 103-fixed positioning block, 104-positioning pin seat, 105-positioning pin, 106-workpiece mounting hole. Detailed Implementation

[0022] The present invention will now be described in this embodiment with reference to the accompanying drawings and some embodiments.

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0024] The following description, in conjunction with the accompanying drawings and embodiments, further illustrates the turntable positioning device of this utility model, aiming to help understand the technical concept and specific implementation of this utility model. However, this description should not be construed as limiting the scope of protection of this utility model.

[0025] See Figure 1-2As shown, a turntable positioning device includes a base structure 101, a drive mechanism, a turntable assembly 102, and a positioning assembly.

[0026] In this embodiment, the base structure 101 is a frame-type support structure, which is made of steel by welding or casting. Its upper surface is provided with an installation platform for fixing the drive mechanism and positioning components. A central hole is provided in the central area of ​​the base structure 101, which penetrates the upper surface and the lower space of the base structure 101. Structurally, it is used to provide a rotational support for the central axis of the turntable assembly 102.

[0027] In this embodiment, the turntable assembly 102 includes a turntable body and a central rotating shaft. The turntable body has a columnar structure, with the central rotating shaft connected to its central portion. The central rotating shaft passes axially through the central hole and is rotatably connected to the base structure 101 via a bearing. The upper surface of the turntable body is provided with a workpiece mounting hole 106 for detachably mounting the workpiece to be processed.

[0028] In this embodiment, the drive mechanism is mounted on the upper platform of the base structure 101 and includes a drive motor, preferably a servo motor, with a drive gear coaxially mounted on its output shaft. The drive gear meshes with a ring gear, which is fixedly connected to the lower surface edge area of ​​the turntable body. The drive gear and the ring gear are arranged horizontally, so that when the drive motor is powered on, it can drive the drive gear to rotate, thereby driving the turntable assembly 102 to rotate around the central axis through meshing transmission, thus realizing the angle adjustment function. The transmission method of the drive structure can be helical, spur, or bevel gear design, depending on the specific transmission efficiency and processing difficulty.

[0029] In this embodiment, the positioning component includes a fixed positioning block 103, a positioning pin seat 104, a positioning pin 105, and an elastic reset mechanism. The fixed positioning block 103 extends along the platform direction of the base structure 101, and its body is provided with multiple positioning holes at equal angular intervals. The central axis of all positioning holes faces the insertion direction of the positioning pin 105 on the turntable assembly 102, ensuring that each target positioning angle has accurate alignment capability.

[0030] In this embodiment, the positioning pin seat 104 has a guide cavity at its end. This guide cavity is a through-hole structure that is aligned with the sliding direction of the positioning pin 105, and its inner wall forms a tight sliding fit with the outer wall of the positioning pin 105. The positioning pin 105 is a columnar structure with its front end being the insertion force end and its rear end being the receiving force end. The insertion force end faces the fixed positioning block 103 and can be inserted into the positioning hole when aligned. During installation, the positioning pin 105 moves axially along the guide cavity to ensure linear movement under the action of the elastic reset mechanism.

[0031] An elastic reset mechanism is located between the positioning pin 105 and the positioning pin seat 104, preferably employing a helical compression spring structure. One end of the spring abuts against the inner wall of the guide cavity of the positioning pin seat 104, and the other end abuts against the force-bearing end of the positioning pin 105. When the turntable assembly 102 is not aligned with the positioning hole, the positioning pin 105 cannot be inserted into the positioning hole due to the rotation of the turntable. At this time, the elastic reset mechanism is in a compressed state, storing elastic potential energy. When the turntable assembly 102 continues to rotate to a predetermined positioning angle, aligning the positioning pin 105 with the corresponding positioning hole, the elastic element releases its potential energy, pushing the positioning pin 105 to quickly insert into the corresponding positioning hole, thereby achieving precise position locking of the turntable and preventing it from continuing to rotate or experiencing angular deviation.

[0032] This invention improves the automation and repeatability of positioning, and is suitable for high-precision workstation transposition processing systems, such as CNC rotary tables, automated assembly stations, or photoelectric detection platforms.

[0033] The above-described specific embodiments are typical examples of this utility model, but this utility model is not limited thereto. Without departing from the core technical concept of this utility model, reasonable changes can be made to its structure, materials, and control logic, and all improvements based thereon fall within the protection scope of this utility model.

[0034] The specific embodiments described herein are merely illustrative and do not limit the scope of protection of this utility model. Various changes and modifications can be made to the specific embodiments of this utility model without departing from its spirit and essence. All such changes and modifications fall within the scope of this utility model.

[0035] It is worth noting that in the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified. 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 connection; they can also refer to a mechanical connection. The circuits described in this utility model are all commonly used circuits in the art, and other related components are all commonly used existing components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A turret positioning device, characterized by, Includes base structure, drive mechanism, turntable assembly, and positioning assembly. The base structure is a support frame, the upper surface of which is used to install the drive mechanism and positioning components, and a central hole is provided in the central area for the rotational engagement of the turntable assembly. The turntable assembly includes a turntable body, which is rotatably mounted on a base structure via a central rotating shaft. The central rotating shaft passes through a central hole and forms a rotatable connection with the base structure. The upper surface of the turntable body is provided with a workpiece mounting hole for mounting the workpiece to be processed. The drive mechanism includes a drive motor mounted on the base structure. The output end of the drive motor is connected to the turntable assembly through a linkage transmission component. The linkage transmission component includes a drive gear mounted on the output end of the drive motor and an annular gear ring meshing with it. The annular gear ring is fixed to the lower surface of the turntable body. The rotation of the drive motor drives the drive gear to rotate, and then drives the turntable assembly to rotate around the central axis through gear meshing, thereby realizing the angle adjustment of the turntable. The positioning assembly includes a fixed positioning block mounted on the base structure, a positioning pin seat located on one side of the turntable assembly, a positioning pin slidably disposed inside the positioning pin seat, and an elastic reset mechanism for providing pre-tightening reset force for the positioning pin. The fixed positioning block is fixed to the base structure and extends towards the turntable assembly, with multiple spaced positioning holes arranged circumferentially on its body. The positioning pin seat is a structure fixedly connected to the side edge of the turntable assembly, with a guide cavity at one end that can slidably accommodate the positioning pin. The guide cavity is axially oriented towards the fixed positioning block. The positioning pin has a columnar structure, with one end being the insertion force end and the other end being the receiving force end, the insertion force end facing the fixed positioning block. The elastic reset mechanism is located between the positioning pin and the positioning pin seat, and is used to push the positioning pin into the corresponding positioning hole when the turntable assembly rotates to a position aligned with the positioning hole on the fixed positioning block, thereby achieving precise angular positioning of the turntable. The elastic reset mechanism includes an elastic element disposed inside the guide cavity.

2. The turntable positioning apparatus according to claim 1, characterized by The drive gear in the linkage transmission assembly is coaxially connected to the output shaft of the drive motor. The ring gear is fixedly set on the outer edge of the lower surface of the turntable assembly. The drive gear and the ring gear are meshed in the horizontal direction. After the drive motor starts, it drives the drive gear to rotate.

3. The turntable positioning apparatus according to claim 1, wherein The positioning pin seat is fixedly installed below or on the side of the turntable assembly. Its internal guide cavity is a through hole structure arranged along the sliding direction of the positioning pin. The inner wall of the guide cavity and the outer wall of the positioning pin form a sliding relationship.

4. The turntable positioning device according to claim 1, characterized in that, The number of positioning holes on the fixed positioning block corresponds to the number of workstations that need to be positioned on the turntable, and they are arranged at equal angular intervals on the circumferential trajectory of the turntable's rotation. The center line of each positioning hole matches the insertion direction of the positioning pin set on the turntable.

Images