A high-precision positioning mechanism

Abstract

The application discloses a high-precision positioning mechanism in the field of welding positioning devices, which comprises a positioning assembly and a fixedly arranged first guide part, the positioning assembly comprises a movable pin head; a second guide part is slidably matched with the first guide part, and the second guide part is connected with the pin head; wherein the second guide part is slidably installed on the first guide part along the moving direction of the pin head; in the application, the first guide part and the second guide part are slidably matched, the first guide part is fixedly arranged, in use, the pin head is connected with the second guide part, when the pin head moves, the relative position of the first guide part and the second guide part is restricted, at this time, the movement of the pin head will not produce shaking, the positioning precision is greatly improved, the rework phenomenon is avoided, and the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of welding positioning device technology, specifically to a high-precision positioning mechanism. Background Technology

[0002] Welding is very common in industrial production. When assembling large workpieces by welding, it is necessary to fix various parts. Workpieces often have holes such as pin holes and positioning holes. After the workpiece is initially fixed, a positioning mechanism is needed to extend a positioning pin to abut against these holes. Generally, this mechanism has the pin directly connected to the telescopic rod of the cylinder. The positioning pin is positioned by driving the telescopic rod. Because the piston is prone to shaking in the cylinder, the positioning pin also shakes, ultimately leading to inaccurate positioning. This can easily cause rework in production applications, greatly increasing production costs and processing time, among other problems. Utility Model Content

[0003] The purpose of this application is to provide a high-precision positioning mechanism to overcome the aforementioned defects caused by the prior art.

[0004] To achieve the above objectives, this application employs the following technical solution: This application discloses a high-precision positioning mechanism, which includes: A positioning component, the positioning component including a movable pin; A first guide portion is fixedly arranged, and a second guide portion is slidably fitted on the first guide portion, the second guide portion being connected to the pin head; The second guide portion is slidably mounted on the first guide portion along the moving direction of the pin head.

[0005] A further embodiment of this application includes a pin seat, wherein a connecting plate is fixed between the pin seat and the second guide portion, the connecting plate is movable, and the pin head is connected to the pin seat.

[0006] In a further embodiment, the connecting plate has an installation area at its center, and the pin seat is placed in the installation area and fixedly connected to the connecting plate.

[0007] A further embodiment also includes a drive unit, wherein the connecting plate is fixed to the telescopic rod of the drive unit by fasteners.

[0008] In a further embodiment, the pin head is detachably connected to the pin seat, and the pin head is threadedly engaged with the pin seat for fixation.

[0009] A further embodiment also includes a mounting bracket, which is fixedly connected to the surface of the drive component, the first guide portion is fixedly connected to the mounting bracket, and the mounting end of the pin seat is clearance-fitted to the mounting bracket.

[0010] In a further embodiment, the mounting bracket includes a fixedly connected limiting seat and a mounting frame, the first guide portion is fixedly connected to the mounting frame, and the mounting end of the pin seat is clearance-fitted to the limiting hole on the limiting seat.

[0011] In a further embodiment, the central axis of the mounting bracket and the central axis of the telescopic rod of the drive component are arranged collinearly.

[0012] The beneficial effects of this application are as follows: This application provides a sliding fit first guide and a second guide. The first guide is fixedly installed. In use, the pin head is connected to the second guide. When the pin head moves, it is constrained by the relative positions of the first guide and the second guide. At this time, the movement of the pin head will not cause shaking, which greatly improves its positioning accuracy, eliminates rework, and improves production efficiency.

[0013] The pin is driven by a drive component, which has a mounting bracket and a guide seat fixed to its surface. Under the constraint of the guide hole on the guide seat, the eccentric stress on the pin is reduced, preventing the pin from breaking during use. The length of the pin can be relatively extended during use, thus improving the durability of the mechanism. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the high-precision positioning mechanism in the embodiments of this application; Figure 2 This is a schematic diagram of the positioning component in an embodiment of this application; Figure 3 This is a schematic diagram of the internal structure of the high-precision positioning mechanism in the embodiments of this application.

[0015] The components are: 1. Positioning component; 2. Mounting bracket; 3. Protective cover; 11. Pin head; 12. Pin seat; 13. Connecting plate; 14. Second guide part; 15. First guide part; 16. Driving component; 17. Fastener; 21. Limit seat; 22. Mounting frame. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use.

[0017] like Figure 1 and Figure 2As shown, this application discloses an embodiment of a high-precision positioning mechanism, which includes a positioning component 1 and a fixedly arranged first guide portion 15. The positioning component 1 includes a movable pin head 11. A second guide portion 14 is slidably fitted on the first guide portion 15 and is connected to the pin head 11. The second guide portion 14 is slidably mounted on the first guide portion 15 along the moving direction of the pin head 11.

[0018] When in use, after receiving the drive from the drive device, the pin head 11 is limited by the cooperation of the first guide part 15 (which can be a guide rail) and the second guide part 14 (which can be a slider), which greatly improves the stability of the movement of the pin head 11, prevents the pin head 11 from shaking during use, and improves the positioning accuracy of the workpiece.

[0019] In some embodiments, a high-precision positioning mechanism is specifically designed as follows; The positioning mechanism has a driving component 16 as the power source for moving the pin head 11. The driving component 16 is usually a hydraulic cylinder or a pneumatic cylinder. In this embodiment, a pneumatic cylinder is used. To facilitate the installation of the pin head 11, a pin seat 12 is provided in the positioning assembly 1. The pin head 11 is installed on the pin seat 12. A connecting plate 13 is fixed between the pin seat 12 and the second guide part 14. The second guide part 14, the connecting plate 13 and the pin seat 12 are fixed by bolts. The connecting plate 13 is fixed to the telescopic rod of the pneumatic cylinder by fasteners 17.

[0020] In another embodiment, two second guide portions 14 are provided. The two second guide portions 14 are symmetrically slidably installed on both sides of the first guide portion 15, and the connecting plate 13 has an installation area in the center. The pin seat 12 is placed in the installation area and fixed to the connecting plate 13. Here, the pin head 11 is detachably connected to the pin seat 12, and the pin head 11 and the pin seat 12 are threaded together for fixation. Normally, the two ends of the pin seat 12 are Z-shaped, one end is threaded, and the pin head 11 is threaded. The two are threaded together. In actual use, one pin seat 12 can be equipped with several pin heads 11 of different diameters to expand the applicability of the mechanism.

[0021] During installation, the first guide part 15 can be directly fixed to the cylinder body, but this is not aesthetically pleasing. Technicians added a mounting bracket 2, which is fixed to the cylinder body, and the first guide part 15 is fixedly connected to the mounting bracket 2. The mounting bracket 2 includes a fixedly connected limiting seat 21 and a mounting frame 22. The first guide part 15 is fixedly connected to the inner wall of the mounting frame 22. The mounting end of the pin seat 12 is fitted with a limiting hole on the limiting seat 21. The presence of the limiting seat 21 greatly reduces the risk of the pin breaking during use, significantly reducing production costs and improving production efficiency. Furthermore, an inspection port can be opened on the mounting frame 22, and the installation can be sealed by a protective cover 3.

[0022] To increase the overall stability of the mechanism, the central axis of the mounting frame 2 and the central axis of the telescopic rod of the drive component 16 are arranged collinearly.

[0023] In use, the drive component 16 (cylinder body), the mounting bracket 2, and the first guide part 15 are fixed. During operation, the drive component 16 is fixedly set, and the telescopic rod of the cylinder moves in and out, driving the connecting plate 13, the pin seat 12, and the pin head 11 to move synchronously. At this time, the second guide part 14 limits the movement path on the first guide part 15, ensuring the positioning accuracy of the pin head 11 after it moves, so that it can stably contact the positioning hole on the workpiece. At the same time, the pin head 11 is greatly reduced in risk of breakage under the protection of the limit seat 21.

[0024] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not 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 on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

Claims

1. A high-precision positioning mechanism, characterized in that, include A positioning component, the positioning component including a movable pin; A first guide portion is fixedly arranged, and a second guide portion is slidably fitted on the first guide portion, the second guide portion being connected to the pin head; The second guide portion is slidably mounted on the first guide portion along the moving direction of the pin head.

2. The high-precision positioning mechanism according to claim 1, characterized in that, It also includes a pin seat, and a connecting plate is fixed between the pin seat and the second guide portion. The connecting plate is movable, and the pin head is connected to the pin seat.

3. The high-precision positioning mechanism according to claim 2, characterized in that, The connecting plate has an installation area in the center, and the pin seat is placed in the installation area and fixedly connected to the connecting plate.

4. The high-precision positioning mechanism according to claim 2, characterized in that, It also includes a drive unit, and the connecting plate is fixed to the telescopic rod of the drive unit by fasteners.

5. The high-precision positioning mechanism according to claim 2, characterized in that, The pin head is detachably connected to the pin seat, and the pin head is threadedly engaged with the pin seat for fixation.

6. The high-precision positioning mechanism according to claim 5, characterized in that, It also includes a mounting bracket, which is fixedly connected to the surface of the drive component, the first guide portion is fixedly connected to the mounting bracket, and the mounting end of the pin seat is clearance-fitted to the mounting bracket.

7. The high-precision positioning mechanism according to claim 6, characterized in that, The mounting bracket includes a fixedly connected limiting seat and a mounting frame. The first guide portion is fixedly connected to the mounting frame, and the mounting end of the pin seat is clearance-fitted to the limiting hole on the limiting seat.

8. The high-precision positioning mechanism according to claim 6, characterized in that, The central axis of the mounting bracket and the central axis of the telescopic rod of the drive component are collinear.

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