Positioning clamp capable of automatically clamping in center

Abstract

The utility model discloses a positioning fixture capable of automatically centering, which relates to the technical field of positioning fixtures and comprises a base and a clamping block, a rotating shaft is mounted at the top of the base through a groove, a rotating seat is mounted at the top of the rotating shaft, a connecting block is connected to the top of the rotating seat in a penetrating manner, and the clamping block is mounted on one side of the connecting block. And the bottom of the clamping block is connected with a movable block. When the positioning clamp capable of automatically clamping in the middle is used, a workpiece to be clamped can be placed on the rotating seat, then the driving motor is started, the driving motor drives the rotating disc to rotate through the output shaft, the arc-shaped groove slides through the rotating disc, and the arc-shaped groove slides to drive the movable block to move through the sliding rod; and by means of the three sets of arc-shaped grooves and the sliding rods, the three sets of movable blocks drive the clamping blocks to move mutually through the connecting blocks, the workpiece can be clamped in the middle through the three sets of clamping blocks, and therefore follow-up machining of the workpiece is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning jigs, in particular to a positioning jig capable of automatically centering and clamping. Background Technique

[0002] A positioning jig is a device used in the processes of machining, assembly or inspection to ensure the accurate placement and fixation of workpieces or parts at specific positions. The positioning jig is an indispensable important tool in modern manufacturing, and it plays a crucial role in improving production efficiency and ensuring product quality.

[0003] When the existing positioning jigs are in use, in order to facilitate the clamping of workpieces, many jigs are usually only equipped with two groups on the left and right. Although the two groups of jigs can play a role in clamping and limiting the workpiece, since the jigs can only clamp and limit the left and right ends of the workpiece, the front and back surfaces of the workpiece do not receive the clamping force, so the center position of the workpiece may shift, thus affecting the subsequent processing effect of the workpiece and not having the function of automatically centering the workpiece. Summary of the Invention

[0004] The purpose of the utility model is to provide a positioning jig capable of automatically centering and clamping to solve the problem that the existing positioning jigs in use do not have the function of automatically centering and clamping workpieces proposed in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A positioning jig capable of automatically centering and clamping, comprising: a base and a clamping block. The top of the base is provided with a rotating shaft through a groove, the top of the rotating shaft is provided with a rotating seat, the top of the rotating seat is connected through a connecting block, and the clamping block is installed on one side of the connecting block;

[0006] The bottom of the clamping block is connected with a movable block, a slider is connected between the bottom of the movable block and the chute of the rotating seat, a sliding rod is installed on one side of the movable block through a groove, a turntable is connected to the outside of the sliding rod, an output shaft penetrates through the middle of the turntable, the bottom of the output shaft is connected with a driving motor through a coupling, a movable spring is installed on one side of the clamping block through a groove, and a clamping head penetrating through the clamping block is connected to one side of the movable spring.

[0007] Preferably, an upper tooth disc is installed on the outside of the rotating shaft, and a lower tooth disc is arranged at the bottom of the upper tooth disc.

[0008] Preferably, a guiding block is installed at the bottom of the lower tooth disc, and a wedge block is installed on one side of the guiding block.

[0009] Preferably, a pressing rod penetrating through the base is arranged on one side of the wedge block, and a clamping rod is inserted through the top of the pressing rod.

[0010] Preferably, a telescopic rod is inserted into one side of the clamping rod, and a telescopic spring is connected between the telescopic rod and the clamping rod.

[0011] Preferably, a sliding block is connected between one side of the clamping rod and the sliding groove of the base.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: When the positioning fixture capable of automatically centering and clamping is in use, the workpiece to be clamped can be placed on the rotating seat, and then the driving motor is started, so that the driving motor drives the turntable to rotate through the output shaft, and the arc-shaped groove slides through the turntable. The sliding of the arc-shaped groove will drive the movable block to move through the sliding rod, and relying on the three arc-shaped grooves and the sliding rod, the three movable blocks will drive the clamping blocks to move towards each other through the connecting blocks, and the workpiece can be clamped at the middle position by the three clamping blocks, thus facilitating the subsequent processing of the workpiece. This is the usage feature of the positioning fixture capable of automatically centering and clamping.

[0013] 1. The positioning fixture capable of automatically centering and clamping can place the workpiece to be clamped on the rotating seat, and then drive the turntable to rotate through the driving motor and the output shaft. The rotation of the turntable can make the sliding rod slide along the arc-shaped groove of the turntable. The sliding of the sliding rod along the arc-shaped groove of the turntable can drive the movable block to slide. While the sliding block is sliding, it will drive the three clamping blocks to move closer to each other through the connecting blocks, and the workpiece can be clamped at the middle position of the rotating seat by the three clamping blocks, which has the effect of centering and clamping the workpiece, thus facilitating the processing of the workpiece.

[0014] 2. The positioning fixture capable of automatically centering and clamping can pull the telescopic rod towards one side of the clamping rod according to the usage requirements, so that the telescopic rod does not limit the clamping rod, and the pressing rod can be pulled out of the groove of the base, so that the pressing rod does not squeeze the wedge-shaped block. At this time, under the action of gravity, the lower tooth disc moves downward through the guiding block, and the separation of the lower tooth disc from the upper tooth disc can make the rotating shaft rotate and drive the rotating seat at the top to rotate, so that the clamping angle of the workpiece can be adjusted without re-clamping the workpiece, meeting the different processing requirements of the user for the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic cross-sectional front view structure of the present utility model;

[0016] Figure 2 It is a schematic cross-sectional front view structure of the pressing rod of the present utility model;

[0017] Figure 3 It is a three-dimensional structure schematic diagram of the turntable of the present utility model;

[0018] Figure 4 It is a schematic cross-sectional first perspective structure diagram of the base of the present utility model;

[0019] Figure 5 This is a schematic cross-sectional view of the second perspective of the base of the present utility model.

[0020] In the figure: 1. Base; 2. Rotating shaft; 3. Rotating seat; 4. Connecting block; 5. Clamping block; 6. Movable block; 7. Slide block; 8. Sliding rod; 9. Turntable; 10. Output shaft; 11. Driving motor; 12. Movable spring; 13. Chuck; 14. Upper gear disc; 15. Lower gear disc; 16. Guide block; 17. Wedge block; 18. Pressing rod; 19. Clamping rod; 20. Telescopic rod; 21. Telescopic spring; 22. Sliding block. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figure 1 , the present utility model provides a technical solution: a positioning fixture capable of automatically centering and clamping, comprising: a base 1 and a clamping block 5. The top of the base 1 is provided with a rotating shaft 2 through a groove, the top of the rotating shaft 2 is provided with a rotating seat 3, the top of the rotating seat 3 is connected through a connecting block 4, and the clamping block 5 is installed on one side of the connecting block 4;

[0023] The bottom of the clamping block 5 is connected with a movable block 6. A slide block 7 is connected between the bottom of the movable block 6 and the chute of the rotating seat 3. One side of the movable block 6 is provided with a sliding rod 8 through a groove. The outside of the sliding rod 8 is connected with a turntable 9. The middle of the turntable 9 is connected through an output shaft 10. The bottom of the output shaft 10 is connected with a driving motor 11 through a coupling. One side of the clamping block 5 is provided with a movable spring 12 through a groove. One side of the movable spring 12 is connected with a chuck 13 penetrating through the clamping block 5. The chuck 13 and the clamping block 5 form a telescopic structure through the movable spring 12.

[0024] During specific implementation, when the positioning fixture capable of automatically centering and clamping needs to clamp a workpiece, the workpiece to be clamped can be placed between the three groups of clamping blocks 5 on the rotating base 3. Then, the driving motor 11 is started. The driving motor 11 will drive the output shaft 10 to rotate through the coupling. There is a turntable 9 connected to the outside of the output shaft 10. Therefore, when the output shaft 10 rotates, it will drive the turntable 9 to rotate. There are three arc-shaped grooves formed around the turntable 9, and a sliding rod 8 is slidably connected inside the arc-shaped groove. The sliding rod 8 is connected in the groove of the movable block 6. When the turntable 9 rotates, it will drive the arc-shaped groove to rotate. Since one end of the arc-shaped groove is far from the center of the turntable 9 and the other end is close to the center of the turntable 9, when the arc-shaped groove rotates, it will drive the three sliding rods 8 to move closer to the center of the turntable 9. The sliding rod 8 is installed in the groove of the movable block 6, and the bottom of the movable block 6 is slidably connected to the chute on the top of the rotating base 3 through the slider 7. Due to the guiding effect of the slider 7 on the movable block 6, when the sliding rod 8 slides along the arc-shaped groove of the turntable 9, it will pull the movable block 6 to move linearly, and make the three movable blocks 6 move closer to each other. When the three movable blocks 6 move closer to each other, they can drive the connecting block 4 and the clamping block 5 on the top to move closer to each other. At this time, the clamping block 5 can play a role in clamping and limiting the workpiece on the rotating base 3. And different positions of the workpiece will exert pressure on the chuck 13 on one side of the clamping block 5. The chuck 13 at different positions is squeezed by the workpiece to different degrees, so that the telescopic distances of the chuck 13 at different positions are different. Through the reset function of the chuck 13 and the movable spring 12, it can play a role in clamping workpieces of different shapes. At the same time, since the three movable blocks 6 drive the clamping block 5 to move towards the center of the rotating base 3 through the connecting block 4, the workpiece can be stably clamped in the middle position through the clamping block 5, having the function of automatically centering and clamping.

[0025] Refer to Figure 1 And Figure 3 As can be seen, during use, the workpiece can be placed on the rotating base 3, and then the driving motor 11 and the output shaft 10 are used to drive the turntable 9 to rotate. At the same time, in cooperation with the arc-shaped groove and the sliding rod 8, the movable block 6 is driven to slide. By driving the three connecting blocks 4 and the clamping block 5 to move closer to each other through the movable block 6, it can play a role in clamping and limiting the workpiece, having the function of centering and clamping the workpiece, thus facilitating the processing of the workpiece.

[0026] An upper gear disc 14 is installed on the outer side of the rotating shaft 2. A lower gear disc 15 is arranged at the bottom of the upper gear disc 14. A guide block 16 is installed at the bottom of the lower gear disc 15. A wedge block 17 is installed on one side of the guide block 16. A pressure rod 18 penetrating through the base 1 is arranged on one side of the wedge block 17. A clamping rod 19 is inserted through the top of the pressure rod 18. A telescopic rod 20 is inserted on one side of the clamping rod 19. A telescopic spring 21 is connected between the telescopic rod 20 and the clamping rod 19. A sliding block 22 is connected between one side of the clamping rod 19 and the chute of the base 1. The mutually approaching ends of the wedge block 17 and the pressure rod 18 are both inclined plane structures.

[0027] During specific implementation, for the positioning fixture that can automatically center and clamp, when the clamping angle of the workpiece needs to be adjusted, the telescopic rod 20 on one side of the clamping rod 19 can be pulled to one side, so that the telescopic rod 20 moves out of the groove of the base 1. Without the obstruction of the telescopic rod 20, the clamping rod 19 can be pulled upward through the sliding block 22. During the upward movement of the clamping rod 19, it will move out of the through groove of the pressure rod 18, so that the clamping rod 19 does not limit the pressure rod 18. Then the pressure rod 18 can be pulled to the outside of the base 1. The mutually approaching sides of the pressure rod 18 and the wedge block 17 are both inclined plane structures. At this time, the pressure rod 18 does not exert extrusion on the wedge block 17. Under the action of gravity, the lower gear disc 15 at the top of the wedge block 17 will move downward along the groove of the base 1 through the guide block 16 at the bottom, making the movement of the lower gear disc 15 more stable. When the lower gear disc 15 moves to the bottom, the lower gear disc 15 no longer docks and limits the upper gear disc 14 outside the rotating shaft 2. At this time, the rotating shaft 2 can be rotated, so that the rotating shaft 2 drives the rotating seat 3 at the top to rotate. Through the rotation of the rotating seat 3, the clamping angle of the workpiece can be adjusted, and there is no need to disassemble the workpiece again to adjust the clamping angle of the workpiece.

[0028] When the angle of the workpiece needs to be fixed, only the pressure rods 18 on both sides of the base 1 need to be squeezed towards the inside of the base 1. At this time, the pressure rod 18 will exert extrusion on the wedge block 17 through the inclined plane, making the wedge block 17 push the lower gear disc 15 upward. When the lower gear disc 15 moves upward, it will dock with the upper gear disc 14 outside the rotating shaft 2. Through the docking of the upper gear disc 14 and the lower gear disc 15, the rotating shaft 2 cannot rotate. The non-rotation of the rotating shaft 2 also makes the rotating seat 3 unable to rotate along the base 1, thus ensuring the stability of the workpiece clamping. At the same time, the clamping rod 19 can be inserted into the groove of the pressure rod 18, and the telescopic rod 20 is released, so that the telescopic rod 20 is reset through the telescopic spring 21. At this time, the telescopic rod 20 can be inserted into the groove on the side of the base 1. The position of the clamping rod 19 can be fixed through the telescopic rod 20, and the clamping rod 19 can limit the pressure rod 18, so that the docking of the lower gear disc 15 and the upper gear disc 14 is more stable.

[0029] Refer to Figure 1, Figure 2 , Figure 4 With Figure 5 It can be seen that during use, the telescopic rod 20 can be pulled to one side according to requirements. Without the limit of the telescopic rod 20 on the clamping rod 19, the clamping rod 19 is pulled upward. At this time, the pressing rod 18 is pulled to the outside of the base 1, so that the pressing rod 18 does not squeeze the lower tooth disc 15 through the wedge-shaped block 17. Due to gravity, the lower tooth disc 15 will move downward and separate from the upper tooth disc 14. At this time, the rotating shaft 2 can drive the rotating seat 3 to rotate, thus facilitating the adjustment of the clamping angle of the workpiece.

[0030] In summary: When using this automatically centered clamping positioning fixture, the base 1 can be placed on a stable position, and then the workpiece to be clamped is placed on the rotating seat 3 according to the usage requirements. At this time, the driving motor 11 can be started. The driving motor 11 and the output shaft 10 cause the turntable 9 to rotate, and cooperate with the sliding rod 8 and the movable block 6 to drive the connecting block 4 and the clamping block 5 to move. The three clamping blocks 5 can clamp and fix the workpiece on the rotating seat 3, thus facilitating the processing of the workpiece. This is the usage feature of this automatically centered clamping positioning fixture. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A positioning fixture capable of automatic centering, comprising: The base (1) and the clamping block (5) are characterized in that: a rotating shaft (2) is installed on the top of the base (1) through a groove, a rotating seat (3) is installed on the top of the rotating shaft (2), a connecting block (4) is connected through the top of the rotating seat (3), and the clamping block (5) is installed on one side of the connecting block (4); The bottom of the clamping block (5) is connected to a movable block (6), a sliding block (7) is connected between the bottom of the movable block (6) and the slide groove of the rotating seat (3), a sliding rod (8) is installed on one side of the movable block (6) through a groove, a rotating disk (9) is connected to the outer side of the sliding rod (8), an output shaft (10) is connected through the middle of the rotating disk (9), and the bottom of the output shaft (10) is connected to a driving motor (11) through a coupling, a movable spring (12) is installed on one side of the clamping block (5) through a groove, and a clamping head (13) that penetrates the clamping block (5) is connected to one side of the movable spring (12).

2. The automatic centering positioning fixture according to claim 1, characterized in that: An upper toothed disc (14) is mounted on the outer side of the rotating shaft (2), and a lower toothed disc (15) is disposed at the bottom of the upper toothed disc (14).

3. The automatic centering positioning fixture according to claim 2 is characterized in that: A guide block (16) is installed at the bottom of the lower toothed disc (15), and a wedge block (17) is installed on one side of the guide block (16).

4. The automatic centering positioning fixture according to claim 3 is characterized in that: A pressure rod (18) penetrating the base (1) is provided on one side of the wedge-shaped block (17), and a clamping rod (19) is inserted through the top of the pressure rod (18).

5. The automatic centering positioning fixture according to claim 4, characterized in that: A telescopic rod (20) is inserted into one side of the clamping rod (19), and a telescopic spring (21) is connected between the telescopic rod (20) and the clamping rod (19).

6. The automatic centering positioning fixture according to claim 4, characterized in that: A sliding block (22) is connected between one side of the clamping rod (19) and the sliding groove of the base (1).

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