High-precision positioning tool

Abstract

The invention relates to the technical field of rotating shaft positioning tools, in particular to a high-precision positioning tool which is characterized in that a movable block is tightly and slidably connected into each second groove, a first connecting plate is fixedly connected to each movable block, and a plurality of fixed seats are connected to the inner wall of a groove seat at equal intervals in the axis direction; each fixing base is rotationally connected with a rotating plate through a fixing shaft, and the upper end of each rotating plate is fixedly connected with an extrusion ball. A set amount of pressurized gas is guided into the first groove through the gas injection hole, and the multiple extrusion balls are driven by gas pressure to fix the machining shaft, so that the extrusion strength of the multiple extrusion balls is the same as that of the machining shaft, the phenomenon that the machining shaft is extruded too loosely or too tightly is avoided, the fixing effect on the machining shaft is improved, and the machining efficiency is improved. And air is introduced to change the air pressure in the first groove to fix the machining shaft, tedious adjustment is not needed, the clamping time of the machining shaft is shortened, and therefore the clamping and positioning speed of the machining shaft is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of shaft positioning tooling, and particularly relates to a high-precision positioning tooling. Background Art

[0002] A shaft is one of the main components of a machine. A shaft that bears both bending moment and torque during operation is called a rotating shaft. A rotating shaft is a mechanical component that supports rotating parts and rotates with them to transmit motion, torque, or bending moment.

[0003] When machining a shaft, a positioning tooling is required to position and fix the shaft being machined. The shaft being machined is clamped and fixed by a clamping member on the positioning tooling. Each time the shaft being machined is installed and removed, the clamping tooling needs to be adjusted to change the clamping tightness. If the clamping is too tight, it is easy to cause deformation of the shaft being machined, resulting in unqualified machined shafts and an increase in the scrap rate. If the clamping is too loose, positioning and fixing cannot be achieved, and the clamping degree cannot be controlled, thus reducing the fixing effect of the shaft being machined. At the same time, it takes a long time to adjust the clamping tooling, increasing the clamping time of the shaft being machined, and thus reducing the clamping and positioning speed of the shaft being machined. Summary of the Invention

[0004] The purpose of the present invention is to solve the disadvantages in the prior art that the clamping degree cannot be controlled, thus reducing the fixing effect of the shaft being machined, and it takes a long time to adjust the clamping tooling, reducing the clamping and positioning speed of the shaft being machined, and to propose a high-precision positioning tooling.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] Design a high-precision positioning tooling, including a groove seat. A perforated limiting frame is connected to the upper end of the groove seat. A first groove is opened at the bottom end inside the groove seat. A plurality of second grooves are equidistantly opened on the inner wall of the first groove along the axial center line direction. A movable block is closely slidably connected in each second groove. A first connecting plate is fixedly connected to each movable block. A plurality of fixed seats are equidistantly connected to the inner wall of the groove seat along the axial center line direction. A rotating plate is rotatably connected to each fixed seat through a fixed shaft. An extrusion ball is fixedly connected to the upper end of each rotating plate. A first spring is connected between each rotating plate and the inner wall of the groove seat.

[0007] Preferably, each of the extrusion balls is a hardened steel ball.

[0008] Preferably, a first cylindrical block is fixedly connected to the bottom end of each rotating plate. A second cylindrical block is fixedly connected to one end of each first connecting plate. Each second cylindrical block is in contact with the corresponding first cylindrical block.

[0009] Preferably, a limiting projection is fixedly connected to the upper end of each of the first connecting plates, and the limiting projection and the first connecting plate are of an integral structure.

[0010] Preferably, a second spring is fixedly connected to each movable block, and one end of each second spring is fixedly connected to the second groove.

[0011] Preferably, a cooperation mechanism for synchronously moving a plurality of movable blocks is connected in the first groove. The cooperation mechanism includes a movable plate which is closely slidably connected into the groove seat. The movable plate divides the first groove into a first chamber and a second chamber. A third spring is fixedly connected to the bottom end of the movable plate, and one end of the third spring is fixedly connected to the second chamber. A plurality of pushing blocks are connected to the upper end of the movable plate at equal intervals along the axial direction. An inclined surface is provided on each pushing block. A second connecting plate is fixedly connected to each movable block, and a roller is connected to one end of each movable block. Each roller is in contact with the corresponding inclined surface.

[0012] Preferably, a plurality of the third springs are provided and are distributed at equal intervals along the axial direction of the movable plate.

[0013] Preferably, a lubrication mechanism for reducing friction is connected to each inclined surface. The lubrication mechanism includes a third groove which is opened on the inclined surface. A plurality of rotating rods are rotatably connected in the third groove at equal intervals along the length direction.

[0014] Preferably, a third chamber is opened on the pushing block, and a lubricating liquid is provided in the third chamber. A liquid injection port is opened on the third chamber. A coating pad is connected in the third groove. The coating pad is in contact with the plurality of rotating rods. A liquid absorbing column is fixedly connected to the coating pad, and one end of the liquid absorbing column extends into the third chamber.

[0015] Preferably, the coating pad is a sponge pad, and the coating pad and the liquid absorbing column are of an integral structure.

[0016] A high-precision positioning tooling proposed by the present invention has the beneficial effects that:

[0017] By introducing a set amount of pressurized gas into the first groove through the air injection hole, a plurality of extrusion balls fix the processing shaft under the push of air pressure. By introducing a set amount of gas, the extrusion strength of the plurality of extrusion balls on the processing shaft is the same, so that the phenomenon of over-loose or over-tight extrusion of the processing shaft will not occur, the fixing effect on the processing shaft is improved, and the air pressure in the first groove is changed by introducing gas to fix the processing shaft, without cumbersome adjustment, reducing the clamping time of the processing shaft, and thus improving the clamping and positioning speed of the processing shaft. Description of the Drawings

[0018] Figure 1Structural schematic diagram of a high-precision positioning tooling proposed by the present invention Figure 1 ;

[0019] Figure 2 Structural schematic diagram of a high-precision positioning tooling proposed by the present invention Figure 2 ;

[0020] Figure 3 Cross-sectional structural schematic diagram of a high-precision positioning tooling proposed by the present invention;

[0021] Figure 4 Structural schematic diagram of the connection between the groove seat and the fixed seat in a high-precision positioning tooling proposed by the present invention;

[0022] Figure 5 Structural schematic diagram of the connection between the rotating plate and the extrusion ball in a high-precision positioning tooling proposed by the present invention;

[0023] Figure 6 Structural schematic diagram of the connection between the first groove and the cooperation mechanism in a high-precision positioning tooling proposed by the present invention;

[0024] Figure 7 Structural schematic diagram of the connection between the cooperation mechanism and the lubrication mechanism in a high-precision positioning tooling proposed by the present invention;

[0025] Figure 8 is Figure 7 Partial enlarged structural schematic diagram at position A above;

[0026] Figure 9 Cross-sectional structural schematic diagram of the connection between the cooperation mechanism and the lubrication mechanism in a high-precision positioning tooling proposed by the present invention;

[0027] Figure 10 is Figure 9 Partial enlarged structural schematic diagram at position B above.

[0028] In the figure: 1. Groove seat; 2. Perforated limit frame; 3. Positioning column; 4. First groove; 5. Sealing plate; 6. Air injection hole; 7. Second groove; 8. Movable block; 9. First connecting plate; 10. Fixed seat; 11. Fixed shaft; 12. Rotating plate; 13. Extrusion ball; 14. First spring; 15. First cylindrical block; 16. Second cylindrical block; 17. Limit protrusion; 18. Second spring; 19. Cooperation mechanism; 20. Lubrication mechanism; 191. Movable plate; 192. First chamber; 193. Second chamber; 194. Third spring; 195. Pushing block; 196. Inclined plane; 197. Second connecting plate; 198. Roller; 201. Third groove; 202. Rotating rod; 203. Third chamber; 204. Liquid injection port; 205. Coating pad; 206. Liquid absorption column. Detailed implementation manners

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0030] Example 1: Refer to Figures 1-6 , a high-precision positioning tooling, including a groove seat 1. A perforated limit frame 2 is connected to the upper end of the groove seat 1. A plurality of positioning columns 3 are connected to the upper end of the perforated limit frame 2 at equal intervals along the axial direction. A first groove 4 is opened at the inner bottom end of the groove seat 1. A sealing plate 5 is hermetically connected to the first groove 4. An air injection hole 6 is opened on the first groove 4. A plurality of second grooves 7 are opened on the inner wall of the first groove 4 at equal intervals along the axial direction. An active block 8 is tightly slidably connected in each second groove 7. A first connecting plate 9 is fixedly connected to each active block 8. One end of each first connecting plate 9 extends outside the second groove 7. A plurality of fixed seats 10 are connected to the inner wall of the groove seat 1 at equal intervals along the axial direction. A rotating plate 12 is rotatably connected to each fixed seat 10 through a fixed shaft 11. An extrusion ball 13 is fixedly connected to the upper end of each rotating plate 12. Each extrusion ball 13 is a hardened steel ball. A first spring 14 is connected between each rotating plate 12 and the inner wall of the groove seat 1. A first cylindrical block 15 is fixedly connected to the bottom end of each rotating plate 12. A second cylindrical block 16 is fixedly connected to one end of each first connecting plate 9. Each second cylindrical block 16 is in contact with the corresponding first cylindrical block 15. A limit protrusion 17 is fixedly connected to the upper end of each first connecting plate 9. The limit protrusion 17 and the first connecting plate 9 are of an integral structure. A second spring 18 is fixedly connected to each active block 8. One end of each second spring 18 is fixedly connected to the second groove 7.

[0031] Working principle:

[0032] A plurality of positioning columns 3 limit and fix the perforated limit frame 2, and the perforated limit frame 2 fixes the groove seat 1. One end of the processing shaft passes through the hole on the perforated limit frame 2. After the processing shaft moves downward by a certain distance, it contacts the sealing plate 5, and the sealing plate 5 provides vertical support and limit. At the same time, the perforated limit frame 2 restricts the horizontal displacement of the processing shaft through the hole wall to prevent it from shifting;

[0033] The pressurized gas is introduced into the first groove 4 through the air injection hole 6, so that the pressure in the first groove 4 increases. After the pressure in the first groove 4 increases, it pushes a plurality of active blocks 8 to move towards the inner wall of the groove seat 1. After the active blocks 8 move, they squeeze the second springs 18. After the second springs 18 are compressed, they generate elastic forces. At the same time, each active block 8 also drives the first connecting plate 9 to move, and each first connecting plate 9 drives the second cylindrical block 16 to move. After each second cylindrical block 16 moves a certain distance, it contacts the first cylindrical block 15;

[0034] After the pressurized gas is continuously introduced, each second cylindrical block 16 pushes the first cylindrical block 15 to move. Each first cylindrical block 15 drives the rotating plate 12 to rotate around the fixed shaft 11. Each rotating plate 12 drives the extrusion ball 13 to rotate towards the processing shaft. After each rotating plate 12 rotates, it pulls the first spring 14. After the first spring 14 is pulled, it generates an elastic force. After filling a set amount of gas, the gas injection is stopped. After injecting the set amount of gas, each extrusion ball 13 rotates a set angle, so that each extrusion ball 13 is in extrusion contact with the groove on the processing shaft. A number of extrusion balls 13 press down on the processing shaft to fix the processing shaft.

[0035] After the gas injection stops, the pressure in the first groove 4 is stable. The air pressure in the first groove 4 presses a number of movable blocks 8. Each movable block 8 pushes and presses the second cylindrical block 16 through the first connecting plate 9. Each second cylindrical block 16 presses the first cylindrical block 15 to squeeze and fix a number of first cylindrical blocks 15, so as to keep a number of extrusion balls 13 in the state of pressing down on the processing shaft. Since a set amount of pressurized gas is introduced, the extrusion intensity of a number of extrusion balls 13 on the processing shaft is the same, and thus the phenomenon of over-loose or over-tight extrusion of the processing shaft will not occur, improving the fixing effect on the processing shaft.

[0036] After the processing is completed, the gas in the first groove 4 is released from the air injection hole 6. The air pressure in the first groove 4 returns to the initial pressure. The second spring 18 drives the movable block 8 to move back to its original position. The movable block 8 drives the second cylindrical block 16 to move back to its original position through the first connecting plate 9. After the first connecting plate 9 returns to its original position, the limit protrusion 17 contacts the groove seat 1. The second spring 18 is in a compressed state. After the second cylindrical block 16 is separated from the first cylindrical block 15, the first cylindrical block 15 loses the extrusion force. Under the elastic force of the first spring 14, it drives the rotating plate 12 to rotate upward and return to its original position. The rotating plate 12 drives the extrusion ball 13 to return to its original position. After a number of extrusion balls 13 return to their original positions, they are separated from the groove on the processing shaft, and the processing shaft loses its fixation. The processing shaft is removed from the perforated limit frame 2.

[0037] When the processing shaft is fixed, a set amount of pressurized gas is introduced into the first groove 4 through the air injection hole 6. Under the push of the air pressure, a number of extrusion balls 13 fix the processing shaft. When the processing shaft is removed, the pressurized gas in the first groove 4 is released from the air injection hole 6. After the air pressure in the first groove 4 disappears, a number of extrusion balls 13 are separated from the processing shaft, and the processing shaft loses its fixation. By introducing gas to change the air pressure in the first groove 4 to fix the processing shaft, there is no need for cumbersome adjustment, reducing the clamping time of the processing shaft, thereby improving the clamping and positioning speed of the processing shaft.

[0038] Embodiment 2: When several movable blocks 8 are pushed by the air pressure in the first groove 4, since the pushing by air pressure is non-contact, the space in the first groove 4 is changed after the several movable blocks 8 move, resulting in the inability of the several movable blocks 8 to move synchronously, and thus the several extrusion balls 13 cannot extrude the processing shaft synchronously, thereby reducing the fixing effect. Refer to Figures 7-9 , as another preferred embodiment of the present invention, on the basis of Embodiment 1, a cooperation mechanism 19 for synchronously moving several movable blocks 8 is connected in the first groove 4. The cooperation mechanism 19 includes a movable plate 191, the movable plate 191 is tightly and slidably connected to the groove seat 1, the movable plate 191 divides the first groove 4 into a first chamber 192 and a second chamber 193, the bottom end of the movable plate 191 is fixedly connected with a third spring 194, one end of the third spring 194 is fixedly connected to the second chamber 193, there are several third springs 194 and they are equally spaced along the axial line direction of the movable plate 191, several pushing blocks 195 are equally spaced along the axial line direction at the upper end of the movable plate 191, an inclined surface 196 is formed on each pushing block 195, a second connecting plate 197 is fixedly connected to each movable block 8, a roller 198 is connected to one end of each movable block 8, and each roller 198 is in contact with the corresponding inclined surface 196.

[0039] Working principle:

[0040] Initially, the roller 198 is in extrusion contact with the inclined surface 196. After the pressurized gas is introduced into the first groove 4, the pressure in the second chamber 193 increases. After the pressure in the second chamber 193 increases, it pushes the movable plate 191 to move upward. After the movable plate 191 moves upward, it pulls the third spring 194. After the third spring 194 is pulled, it generates an elastic force. After the movable plate 191 moves upward, the pressure in the first chamber 192 increases, and the gas in the first chamber 192 extrudes the movable block 8;

[0041] At the same time, after the movable plate 191 moves upward, it also drives several pushing blocks 195 to move upward. Each movable plate 191 pushes the corresponding roller 198 through the inclined surface 196. After the roller 198 is pushed, it moves in the horizontal direction. Each roller 198 pushes and presses the movable block 8 through the second connecting plate 197. Several second connecting plates 197 synchronously push the corresponding movable blocks 8, so that several movable blocks 8 move synchronously, so that several extrusion balls 13 synchronously extrude the processing shaft, thereby improving the fixing effect of the processing shaft;

[0042] After discharging the pressurized gas in the second chamber 193, under the elastic force of the third spring 194, it drives the movable plate 191 to move downward and reset, and the movable plate 191 drives the pushing block 195 to move downward and reset.

[0043] Embodiment 3: When the roller 198 is pushed to move by the inclined surface 196, it is easy to get stuck due to friction between the inclined surface 196 and the roller 198, so that the roller 198 cannot be pushed to move in the horizontal direction, and thus several movable blocks 8 cannot be pushed synchronously. Refer to Figure 8 and Figure 10 , as another preferred embodiment of the present invention, on the basis of Embodiment 2, a lubricating mechanism 20 for reducing friction is connected to each inclined surface 196. The lubricating mechanism 20 includes a third groove 201. The third groove 201 is opened on the inclined surface 196. A plurality of rotating rods 202 are rotatably connected in the third groove 201 at equal intervals along the length direction. A third chamber 203 is opened on the pushing block 195. A lubricating liquid is provided in the third chamber 203. A liquid injection port 204 is opened on the third chamber 203. A coating pad 205 is connected in the third groove 201. The coating pad 205 is in contact with the plurality of rotating rods 202. A liquid absorption column 206 is fixedly connected to the coating pad 205. One end of the liquid absorption column 206 extends into the third chamber 203. The coating pad 205 is a sponge pad. The coating pad 205 and the liquid absorption column 206 are of an integral structure.

[0044] Working principle:

[0045] Initially, the rotating rod 202 is in extrusion contact with the roller 198. During the upward movement of the pushing block 195, it is in rolling contact with the roller 198 through the rotating rod 202. By replacing sliding friction with rolling friction, the friction suffered during the horizontal movement of the roller 198 is reduced, and it will not get stuck due to friction.

[0046] At the same time, the lubricating oil in the third chamber 203 enters the coating pad 205 through the liquid absorption column 206. The coating pad 205 smears the lubricating oil on the rotating rod 202, improving the smoothness of the surface of the rotating rod 202. Thus, when the roller 198 is pushed, the friction between the rotating rod 202 and the roller 198 is reduced, and it will not get stuck when the roller 198 is pushed, ensuring that the roller 198 can be pushed to move in the horizontal direction, and further synchronously pushing several movable blocks 8 to move.

[0047] The above is only a specific and preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A high-precision positioning tooling, comprising a groove seat (1), a perforated limiting frame (2) is connected to the upper end of the groove seat (1), a first groove (4) is opened at the inner bottom end of the groove seat (1), and a plurality of second grooves (7) are equidistantly opened on the inner wall of the first groove (4) along the axial direction, characterized in that, Wherein: An active block (8) is closely and slidably connected in each second groove (7). A first connecting plate (9) is fixedly connected to each active block (8). A plurality of fixed seats (10) are connected to the inner wall of the groove seat (1) at equal intervals along the axial direction. A rotating plate (12) is rotatably connected to each fixed seat (10) through a fixed shaft (11). An extrusion ball (13) is fixedly connected to the upper end of each rotating plate (12). A first spring (14) is connected between each rotating plate (12) and the inner wall of the groove seat (1).

2. The high-precision positioning tooling according to claim 1, wherein Each of the extrusion balls (13) is a hardened steel ball.

3. The high-precision positioning tooling according to claim 1, wherein A first cylindrical block (15) is fixedly connected to the bottom end of each rotating plate (12). A second cylindrical block (16) is fixedly connected to one end of each first connecting plate (9). Each second cylindrical block (16) is in contact with the corresponding first cylindrical block (15).

4. The high-precision positioning tooling according to claim 3, wherein A limiting protrusion (17) is fixedly connected to the upper end of each first connecting plate (9). The limiting protrusion (17) and the first connecting plate (9) are of an integral structure.

5. The high-precision positioning tooling according to claim 1, wherein A second spring (18) is fixedly connected to each active block (8). One end of each second spring (18) is fixedly connected to the second groove (7).

6. The high-precision positioning tooling according to claim 1, wherein A cooperative mechanism (19) for synchronously moving a plurality of active blocks (8) is connected in the first groove (4). The cooperative mechanism (19) includes an active plate (191). The active plate (191) is closely and slidably connected into the groove seat (1). The active plate (191) divides the first groove (4) into a first chamber (192) and a second chamber (193). A third spring (194) is fixedly connected to the bottom end of the active plate (191). One end of the third spring (194) is fixedly connected to the second chamber (193). A plurality of pushing blocks (195) are connected to the upper end of the active plate (191) at equal intervals along the axial direction. An inclined surface (196) is formed on each pushing block (195). A second connecting plate (197) is fixedly connected to each active block (8). A roller (198) is connected to one end of each active block (8). Each roller (198) is in contact with the corresponding inclined surface (196).

7. The high-precision positioning tooling according to claim 6, wherein, A plurality of the third springs (194) are provided and are distributed at equal intervals along the axial direction of the active plate (191).

8. The high-precision positioning tooling according to claim 7, wherein A lubricating mechanism (20) for reducing friction is connected to each inclined surface (196). The lubricating mechanism (20) includes a third groove (201). The third groove (201) is formed on the inclined surface (196). A plurality of rotating rods (202) are rotatably connected in the third groove (201) at equal intervals along the length direction.

9. The high-precision positioning tooling according to claim 8, wherein A third chamber (203) is formed on the pushing block (195), a lubricating fluid is provided in the third chamber (203), a liquid injection port (204) is formed on the third chamber (203), a coating pad (205) is connected in the third groove (201), the coating pad (205) is in contact with a plurality of rotating rods (202), a liquid absorbing column (206) is fixedly connected to the coating pad (205), and one end of the liquid absorbing column (206) extends into the third chamber (203).

10. The high-precision positioning tooling according to claim 9, wherein The coating pad (205) is a sponge pad, and the coating pad (205) and the liquid absorbing column (206) are of an integral structure.

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