Steel ball self-centering positioning mechanism

Abstract

The utility model discloses a steel ball self-centering positioning mechanism, which relates to the technical field of self-centering positioning mechanisms and comprises a positioning shaft, a first movable groove is arranged in the positioning shaft, a first steel ball is arranged in the first movable groove, and a limiting mechanism is arranged on the positioning shaft and positioned on the outer side of the first movable groove. A reset mechanism is arranged at the position, located at the bottom of the first movable groove, in the positioning shaft, a flange is arranged above the positioning shaft, the flange and the positioning shaft are fixedly connected through a mounting mechanism, a control mechanism is arranged on the flange, the mounting mechanism can be detached, and the limiting mechanism can limit and fix parts through the control mechanism; and the reset mechanism can jack up and reset the first steel ball, so that the mounting and dismounting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of self-centering positioning mechanisms, in particular to a steel ball self-centering positioning mechanism. Background Technique

[0002] The domestic automobile industry has been using processes such as hot forming, welding, shaping, and surface treatment to manufacture pipe parts. When laser cutting and welding processes are carried out on pipe fittings, robots are currently used for automatic cutting and welding, and the tooling for robot automatic cutting and welding uses external positioning and clamping of workpieces.

[0003] The inner support type self-centering tooling described in the patent with the patent announcement number CN211136136U includes a central shaft. The central shaft is provided with a piston guide hole along its central axis. The piston guide hole is coaxially arranged with the tooling to be processed. Two conical pistons are arranged inside the piston guide hole. The two conical pistons are placed in opposite directions, and there is a gap between the two conical pistons. A spring is placed in the gap. The central shaft is provided with a steel ball guide hole at the conical surface position corresponding to the conical piston. The steel ball guide hole is arranged along the radial direction of the central shaft, and a tapered reduced diameter hole is provided at one end of the steel ball guide hole close to the outer diameter of the central shaft. Steel balls of the same size are plugged in each steel ball guide hole. The steel balls can move freely in the steel ball guide hole. The steel balls are pushed by the spring and the piston, and simultaneously have the functions of supporting and fixing the workpiece and guiding. However, this mechanism is complex to use, cannot quickly position and fix parts, affects the efficiency of installation and disassembly, and has poor practicability.

[0004] Based on this, a steel ball self-centering positioning mechanism is now provided, which can eliminate the disadvantages of existing devices. Content of the Utility Model

[0005] The purpose of the utility model is to provide a steel ball self-centering positioning mechanism to solve the problems that the existing mechanism is complex to use, cannot quickly position and fix parts, affects the efficiency of installation and disassembly, and has poor practicability.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A steel ball self-centering positioning mechanism includes a positioning shaft. A first movable groove is arranged inside the positioning shaft. A first steel ball is arranged inside the first movable groove. A limiting mechanism is arranged on the positioning shaft outside the first movable groove. A reset mechanism is arranged at the bottom of the first movable groove inside the positioning shaft. A flange is arranged above the positioning shaft. The flange and the positioning shaft are fixedly connected through an installation mechanism. A control mechanism is arranged on the flange.

[0008] On the basis of the above technical solutions, the utility model also provides the following optional technical solutions:

[0009] In an alternative solution: The limiting mechanism includes positioning grooves, and a plurality of positioning grooves are arranged on the outer side of the first movable groove on the positioning shaft. A second steel ball is arranged in the positioning groove, and the diameter of the second steel ball is larger than the diameter of the outer port of the positioning groove.

[0010] In an alternative solution: The second steel ball is located below the first steel ball, and the surface of the second steel ball is in contact with the surface of the first steel ball.

[0011] In an alternative solution: The installation mechanism includes first threaded holes, and a plurality of first threaded holes are arranged at the top end of the positioning shaft. Second threaded holes are arranged at positions on the flange corresponding to the first threaded holes, and the first threaded holes and the second threaded holes are fixedly connected by installation screws.

[0012] In an alternative solution: An annular limiting block is arranged in the first movable groove on the bottom surface of the flange, and the annular limiting block is located above the first steel ball.

[0013] In an alternative solution: The control mechanism includes a pressing screw, the pressing screw is rotationally connected to the flange by threads, and a pressing block is arranged at the bottom end of the pressing screw in the annular limiting block.

[0014] In an alternative solution: The reset mechanism includes a second movable groove, the second movable groove is located at the bottom of the first movable groove in the positioning shaft, a compression spring is arranged in the second movable groove, the bottom end of the compression spring is fixedly connected to the bottom of the second movable groove, and the top end of the compression spring is located below the first steel ball.

[0015] In an alternative solution: A plurality of through grooves are arranged on the bottom surface of the first movable groove on the outer side of the first movable groove.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] In the present utility model, a first movable groove is arranged in the positioning shaft, a first steel ball is arranged in the first movable groove, a limiting mechanism is arranged on the outer side of the first movable groove on the positioning shaft, a reset mechanism is arranged at the bottom of the first movable groove in the positioning shaft, a flange is arranged above the positioning shaft, the flange and the positioning shaft are fixedly connected by an installation mechanism, a control mechanism is arranged on the flange, the installation mechanism can be disassembled, the limiting mechanism can limit and fix parts through the control mechanism, and the reset mechanism can push up and reset the first steel ball, improving the installation and disassembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0019] Figure 2 It is a schematic diagram of the overall internal structure of the present utility model.

[0020] Figure 3 Schematic diagram of the internal structure of the positioning shaft of the present utility model.

[0021] Figure 4 Schematic diagram of the structure of the limiting mechanism of the present utility model.

[0022] Annotation of reference numerals: 1. Positioning shaft; 2. First movable groove; 3. First steel ball; 4. Positioning groove; 5. Second steel ball; 6. Through groove; 7. Second movable groove; 8. Compression spring; 9. First threaded hole; 10. Flange; 11. Second threaded hole; 12. Mounting screw; 13. Annular limiting block; 14. Compression screw; 15. Pressing block. Detailed implementation manners

[0023] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] In one embodiment, as Figures 1-4 shown, a steel ball self-centering positioning mechanism includes a positioning shaft 1. A first movable groove 2 is provided inside the positioning shaft 1. A first steel ball 3 is provided inside the first movable groove 2. A limiting mechanism is provided on the positioning shaft 1 outside the first movable groove 2. A reset mechanism is provided at the bottom of the first movable groove 2 inside the positioning shaft 1. A flange 10 is provided above the positioning shaft 1. The flange 10 and the positioning shaft 1 are fixedly connected through a mounting mechanism. A control mechanism is provided on the flange 10. The mounting mechanism can be disassembled. Through the control mechanism, the limiting mechanism can limit and fix parts. The reset mechanism can push up and reset the first steel ball, improving the efficiency of installation and disassembly.

[0025] In one embodiment, as Figure 4 shown, the limiting mechanism includes a positioning groove 4. A plurality of positioning grooves 4 are provided on the positioning shaft 1 outside the first movable groove 2. A second steel ball 5 is provided inside the positioning groove 4. And the diameter dimension of the second steel ball 5 is larger than the diameter dimension of the outer port of the positioning groove 4. The second steel ball 5 can move in the positioning groove 4.

[0026] In one embodiment, as Figure 2 shown, the second steel ball 5 is located below the first steel ball 3, and the surface of the second steel ball 5 is in contact with the surface of the first steel ball 3. When the first steel ball 3 moves downward, it will squeeze the second steel ball 5, so that it protrudes from the positioning groove 4, quickly limiting and fixing internal and external parts.

[0027] In one embodiment, as Figure 2As shown in the figure, the installation mechanism includes a plurality of first threaded holes 9 provided at the top end of the positioning shaft 1. Second threaded holes 11 are provided at positions corresponding to the first threaded holes 9 on the flange 10, and the first threaded holes 9 and the second threaded holes 11 are fixedly connected by installation screws 12. The flange 10 can be disassembled by the installation screws 12.

[0028] In one embodiment, as Figure 2 shown, an annular limiting block 13 is provided at the bottom surface of the flange 10 within the first movable groove 2. The annular limiting block 13 is located above the first steel ball 3, and the annular limiting block 13 can limit the moving distance of the first steel ball 3.

[0029] In one embodiment, as Figure 2 shown, the control mechanism includes a pressing screw 14 which is threadedly rotatably connected to the flange 10. A pressing block 15 is provided at the bottom end of the pressing screw 14 within the annular limiting block 13. Rotating the pressing screw 14 can cause the pressing screw 14 to move downward, so that the pressing block 15 at the bottom end of the pressing screw 14 presses the first steel ball 3 downward.

[0030] In one embodiment, as Figure 2 shown, the reset mechanism includes a second movable groove 7 provided at the bottom of the first movable groove 2 within the positioning shaft 1. A compression spring 8 is provided within the second movable groove 7. The bottom end of the compression spring 8 is fixedly connected to the bottom of the second movable groove 7. The top end of the compression spring 8 is located below the first steel ball 3, and the first steel ball 3 presses the compression spring 8 during the downward movement.

[0031] In one embodiment, as Figure 3 shown, a plurality of through grooves 6 are provided on the bottom surface of the first movable groove 2 outside the first movable groove 2 to allow the internal air to circulate and improve the usage fluency.

[0032] The above embodiment discloses a steel ball self-centering positioning mechanism. During use, rotating the pressing screw 14 can cause the pressing screw 14 to move downward, so that the pressing block 15 at the bottom end of the pressing screw 14 presses the first steel ball 3 downward. When the first steel ball 3 moves downward, it will press the second steel ball 5, causing it to protrude from the positioning groove 4, quickly limiting and fixing the internal and external parts. And during the downward movement of the first steel ball 3, the compression spring 8 is pressed. When disassembling, rotate the pressing screw 14 in the reverse direction so that the top of the first steel ball 3 is not subject to external force. At this time, the compression spring 8 jacks up the first steel ball 3 under the action of reset, causing the second steel ball 5 to retract into the positioning groove 4, thus achieving quick disassembly.

[0033] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A steel ball self-centering positioning mechanism, comprising a positioning shaft (1), characterized in that: A first movable groove (2) is arranged in the positioning shaft (1), a first steel ball (3) is arranged in the first movable groove (2), a limiting mechanism is arranged on the positioning shaft (1) outside the first movable groove (2), a reset mechanism is arranged in the positioning shaft (1) at the bottom of the first movable groove (2), a flange (10) is arranged above the positioning shaft (1), the flange (10) and the positioning shaft (1) are fixedly connected via a mounting mechanism, and a control mechanism is arranged on the flange (10).

2. The steel ball self-centering positioning mechanism according to claim 1, characterized in that: The limiting mechanism comprises a positioning groove (4), wherein a plurality of the positioning grooves (4) are arranged outside the first movable groove (2) on the positioning shaft (1), a second steel ball (5) is arranged in the positioning groove (4), and a diameter of the second steel ball (5) is greater than a diameter of an outer port of the positioning groove (4).

3. The steel ball self-centering positioning mechanism according to claim 2, characterized in that: The second steel ball (5) is located below the first steel ball (3), and the second steel ball (5) is in contact with the surface of the first steel ball (3).

4. The steel ball self-centering positioning mechanism according to claim 1, characterized in that: The mounting mechanism comprises a first threaded hole (9), wherein a plurality of the first threaded holes (9) are arranged at the top end of the positioning shaft (1), and a second threaded hole (11) is arranged on the flange (10) at a position corresponding to the first threaded hole (9), and the first threaded hole (9) and the second threaded hole (11) are fixedly connected by a mounting screw (12).

5. The steel ball self-centering positioning mechanism according to claim 4, characterized in that: An annular limiting block (13) is provided on the bottom surface of the flange (10) located in the first movable groove (2), and the annular limiting block (13) is located above the first steel ball (3).

6. The steel ball self-centering positioning mechanism according to claim 5, characterized in that: The control mechanism comprises a clamping screw (14), the clamping screw (14) being threadably connected to the flange (10), and a clamping block (15) being arranged in the annular limiting block (13) at the bottom end of the clamping screw (14).

7. The steel ball self-centering positioning mechanism according to claim 1, characterized in that: The reset mechanism comprises a second movable groove (7), the second movable groove (7) being located at the bottom of the first movable groove (2) in the positioning shaft (1), a compression spring (8) being arranged in the second movable groove (7), the bottom end of the compression spring (8) being fixedly connected to the bottom of the second movable groove (7), and the top end of the compression spring (8) being located below the first steel ball (3).

8. The steel ball self-centering positioning mechanism according to claim 7, characterized in that: The bottom surface of the first movable groove (2) is provided with a plurality of through grooves (6) located outside the first movable groove (2).

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