A rotary positioning fixture

Abstract

The present invention aims to provide a rotary positioning fixture with a compact overall structure, suitable for welding work, and capable of satisfying the positioning effect through fine adjustment. The present invention includes a mounting seat, a rotating seat, and a driving assembly arranged on the mounting seat, the two ends of the rotating seat are respectively rotatably connected to the mounting seat, the output shaft of the driving assembly is coaxially arranged with the rotating seat, the rotary positioning fixture also includes a positioning seat, a lateral fine-tuning assembly and a longitudinal fine-tuning assembly connected to the positioning seat, the positioning seat is arranged on the rotating seat, the positioning seat is provided with two groups of profiling grooves, and a parts station is arranged between the two groups of the profiling grooves, and the parts station realizes the three-dimensional positioning of parts through the fine adjustment of the lateral fine-tuning assembly and the longitudinal fine-tuning assembly. The present invention is applied to the technical field of fixtures.

Description

Technical Field

[0001] The present invention is applied to the technical field of clamps, and particularly relates to a rotary positioning clamp. Background Art

[0002] Touch screens are widely used in electronic products. Users need to use their fingers or capacitive pens to press the touch screen to perform related operations. When a finger or capacitive pen touches the surface of the touch screen, a contact capacitor is formed between the touch object and the transparent conductive layer on the surface of the touch screen. By sensing the electrical signal between the touch point and each electrode of the transparent conductive layer, the capacitive sensing is enhanced, thereby determining the specific position of the touch point on the touch screen, reducing the contact area, and significantly enhancing the user experience with a thin pen tip.

[0003] During the assembly process of the capacitive pen, the two ends of the tiny parts need to be welded to the workpiece to achieve signal conduction. If manual positioning of the welding points is used for welding, the accuracy of the welding points is poor and the welding efficiency is low. The positioning fixtures available on the market can position and clamp the parts and workpieces to avoid displacement during the welding process. At the same time, the positioning fixture needs to drive the parts and workpieces to rotate at a certain angle to meet the welding requirements. For example, the invention patent with the publication number CN206588648U discloses a rotating positioning fixture, which places the workpiece in the slot, installs the cover plate on the mold plate to hold the workpiece, the first cylinder drives the pressure block to fix the mold plate, the cover plate and the workpiece on the bracket, the driving member drives the rotating column to rotate the workpiece to a predetermined angle, and the second cylinder drives the positioning column to be inserted into the corresponding positioning hole, thereby accurately positioning the workpiece at a predetermined position. The above patent can realize the positioning of the workpiece and can drive the workpiece to rotate. However, it is suitable for positioning workpieces with larger sizes, and it is difficult to meet the needs of workpieces with smaller sizes and high positioning accuracy. In addition, it uses multiple cylinders for driving, the equipment cost is high, the overall structure is large, and it is not conducive to maintenance. At the same time, the impact force of the cylinder is large, and the moving stroke of the clamp is long, which makes it difficult to achieve fine adjustment of the clamp. Therefore, it is necessary to provide a rotary positioning fixture with a compact overall structure, suitable for welding work, and can meet the positioning effect through fine adjustment. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a rotary positioning fixture which has a compact overall structure, is suitable for welding work, and can satisfy the positioning effect through fine adjustment.

[0005] The technical solution adopted by the present invention is: the present invention includes a mounting seat, a rotating seat and a driving assembly arranged on the mounting seat, the two ends of the rotating seat are respectively rotatably connected to the mounting seat, the output shaft of the driving assembly is coaxially arranged with the rotating seat, the rotary positioning fixture also includes a positioning seat, a lateral fine-tuning assembly and a longitudinal fine-tuning assembly connected to the positioning seat, the positioning seat is arranged on the rotating seat, the positioning seat is provided with two groups of profiling grooves, and a parts station is arranged between the two groups of the profiling grooves, and the parts station realizes the three-dimensional positioning of the parts by fine-tuning the lateral fine-tuning assembly and the longitudinal fine-tuning assembly.

[0006] It can be seen from the above scheme that the two groups of profiling grooves are used to place product components, the parts station is used to place parts, the parts station is located between the two groups of profiling grooves, and the two ends of the parts are respectively welded to the two groups of product components to achieve signal conduction, and the mounting seat drives the rotating seat to rotate a certain angle to meet the welding requirements. Due to the small size of the parts, when the rotating seat rotates, if the parts are not positioned, the parts are prone to shifting, thereby affecting the welding effect. Most of the positioning devices on the market use a driving cylinder for clamping and positioning, but the impact force of the driving cylinder is large, the moving stroke is long, and the parts are easily clamped and exploded. The overall structural design of the present application is reasonable, there is an independent positioning mechanism for the parts, the positioning effect is good, and the unified positioning of the parts and product components can be achieved. It does not affect the welding of the welding equipment during welding, and is suitable for welding work.

[0007] A preferred solution is that the lateral fine-tuning assembly includes a connecting block, a plunger, a V-shaped block, a connecting column, a first compression spring, a rotating shaft, a push block, a bearing seat, a bearing column passing through the bearing seat and three groups of fixed seats, the connecting block, the rotating shaft, the connecting column and the bearing seat are connected to the bottom of the positioning seat in sequence, the intersection end of the V-shaped block is rotatably connected to the rotating shaft, the plunger passes through the connecting block and pushes and cooperates with the side end of one side of the V-shaped block, one side of the V-shaped block is provided with a waist-shaped groove, one end of the bearing column is movably arranged on the waist-shaped groove by a bolt, one end of the first compression spring is connected to the connecting column, the other end of the first compression spring is connected to a side of the V-shaped block close to the plunger, and the other end of the bearing column is connected to the lower end of the push block, and the push block moves along one end of the component station through the rotation of the V-shaped block and the transmission of the bearing column, and the three groups of fixed seats are respectively fixed at the other three ends centered on the component station.

[0008] It can be seen from the above scheme that the three groups of fixed seats are respectively fixed at three ends centered on the component station, and the push block is the other end centered on the component station. The push block gradually approaches the component station through the rotation of the V-shaped block and the transmission of the bearing column, thereby limiting and fixing the component station in the lateral direction.

[0009] A preferred solution is that the longitudinal fine-tuning assembly includes a support column, a second compression spring, a transmission column and a telescopic column. A through hole is provided from top to bottom at the bottom of the component workstation, the support column passes through the through hole, one end of the transmission column is connected to the middle end of the support column, the upper and lower ends of the support column are press-fitted with the positioning seat through the second compression spring, the middle end of the telescopic column is provided with two layers of arc grooves with different diameters, the telescopic column passes through the positioning seat horizontally, the other end of the transmission column is stuck in the arc groove, and the telescopic column is rotated to make the transmission column move back and forth in the two layers of the arc grooves, thereby driving the telescopic column to extend and retract up and down.

[0010] It can be seen from the above scheme that the top end of the support column is used to support parts, and the telescopic column drives the transmission column to rise and fall. Since one end of the transmission column is connected to the middle end of the support column, the upper and lower ends of the support column are pressed together with the positioning seat through the second compression spring, thereby driving the support column to rise and fall.

[0011] A preferred solution is that the rotary positioning fixture further includes a pressing block, one end of which is connected to the top end of the pushing block, the pressing block and the pushing block are connected to form an L-shaped structure, and the pressing block cooperates with the supporting column.

[0012] The above scheme and Figure 5 It can be seen that the pressure block and the push block are connected to form an L-shaped structure, and the L-shaped structure is set and connected to one end of the bearing column. The L-shaped structure not only limits and fixes the component station in the lateral direction, but also realizes the limit and fixation in the longitudinal direction of the component station through the cooperation between the pressure block and the support column.

[0013] A preferred solution is that the rotary positioning fixture also includes a pressure cover, the rear end of the pressure cover is hinged to the top end of the positioning seat, buckles are provided on both sides of the front end of the pressure cover, and the positioning seat is provided with a positioning groove that cooperates with the buckle to limit the position.

[0014] It can be seen from the above solution that the pressure cover is used to press the product components on the two groups of the contoured grooves to prevent the positioning seat from shifting during the rotation process, thereby affecting the welding effect.

[0015] A preferred solution is that a plurality of soft blocks are arranged at the bottom end of the pressure cover, and when the pressure cover is rotated and pressed downward, the soft blocks are pressed into engagement with the product components on the contoured groove.

[0016] It can be seen from the above solution that when the pressure cover is rotated and pressed downward, the soft block is pressed against the product on the contoured groove, further improving the positioning effect of the product component.

[0017] A preferred solution is that the rotating seat is in a U-shaped structure, and the two ends of the rotating seat are rotatably connected to the two ends of the mounting seat through the bearing seat respectively, and the driving assembly includes a servo motor, a synchronous belt, a driving wheel and a driven wheel. The output shaft of the servo motor is transmission-connected to the driving wheel, the synchronous belt is arranged on the driving wheel and the driven wheel, and the driven wheel is coaxially arranged with one of the bearing seats.

[0018] It can be seen from the above solution that the driving assembly serves as a power source for the rotation of the rotating seat, and the bearing seat provides rotation support for both ends of the mounting seat.

[0019] A preferred solution is that the rotary positioning fixture further includes a sensing sheet and a photoelectric sensor, the sensing sheet is connected to the lower end of the rotating seat, the photoelectric sensor is arranged on the mounting seat, and the sensing sheet cooperates with the electrical signal of the photoelectric sensor.

[0020] It can be seen from the above scheme that the induction sheet cooperates with the electrical signal of the photoelectric sensor to ensure that the rotating seat rotates into place, which is beneficial to improving the welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention during welding;

[0023] Figure 3 is a schematic diagram of the three-dimensional structure of the positioning seat when it is opened;

[0024] Figure 4 is a schematic diagram of the three-dimensional structure of the positioning seat;

[0025] Figure 5 is a schematic diagram of the three-dimensional structure of the lateral fine-tuning component;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the longitudinal fine-tuning component. DETAILED DESCRIPTION

[0027] like Figures 1 to 6As shown, in this embodiment, the present invention includes a mounting seat 1, a rotating seat 2 and a driving assembly 3 arranged on the mounting seat 1, the two ends of the rotating seat 2 are respectively rotatably connected to the mounting seat 1, the output shaft of the driving assembly 3 is coaxially arranged with the rotating seat 2, and the rotary positioning fixture also includes a positioning seat 4, a lateral fine-tuning assembly 5 and a longitudinal fine-tuning assembly 6 connected to the positioning seat 4, the positioning seat 4 is arranged on the rotating seat 2, the positioning seat 4 is provided with two groups of profiling grooves 7, and a parts station 8 is arranged between the two groups of the profiling grooves 7, and the parts station 8 realizes three-dimensional positioning of parts by fine-tuning the lateral fine-tuning assembly 5 and the longitudinal fine-tuning assembly 6. The mounting seat 1 and the rotating seat 2 are both U-shaped structures. The rotating seat 2 is located in the middle depression of the mounting seat 1, and its two ends are rotatably connected to the two ends of the mounting seat 1 respectively. The positioning seat 4 serves as a mold for parts and product components. The transverse fine-tuning component 5 is used to position the parts in the X and Y axis directions, and the longitudinal fine-tuning component 6 is used to position the parts in the Z axis direction, so as to achieve three-dimensional fine-tuning positioning of the parts. When the rotating seat 2 drives the positioning seat 4 to rotate a certain angle, the external welding equipment welds the parts to the product components.

[0028] In this embodiment, the lateral fine-tuning assembly 5 includes a connecting block 9, a plunger 10, a V-shaped block 11, a connecting column 12, a first compression spring 13, a rotating shaft 14, a push block 15, a bearing seat 16, a bearing column 17 passing through the bearing seat 16, and three sets of fixed seats 18. The connecting block 9, the rotating shaft 14, the connecting column 12 and the bearing seat 16 are connected to the bottom of the positioning seat 4 in sequence, the intersection end of the V-shaped block 11 is rotatably connected to the rotating shaft 14, the plunger 10 passes through the connecting block 9 and pushes the side end of one side of the V-shaped block 11 to cooperate, and the V-shaped block 11 A waist-shaped groove 19 is opened on one side, and one end of the bearing column 17 is movably set on the waist-shaped groove 19 by a bolt. One end of the first compression spring 13 is connected to the connecting column 12, and the other end of the first compression spring 13 is connected to a side of the V-shaped block 11 close to the plunger 10. The other end of the bearing column 17 is connected to the lower end of the push block 15. Through the rotation of the V-shaped block 11 and the transmission of the bearing column 17, the push block 15 moves along one end of the component station 8, and the three groups of fixed seats 18 are respectively fixed at the other three ends centered on the component station 8. The operator rotates the plunger 10, and the V-shaped block 11 is laterally rotated at the rotating shaft 14 through the push of the plunger 10. Since the bolt at one end of the bearing column 17 is movably set on the waist-shaped groove 19, under the rotation of the V-shaped block 11, the bolt gradually moves from one end of the waist-shaped groove 19 to the other end of the waist-shaped groove 19. The bearing seat 16 plays a sliding support role in the movement of the bearing column 17. The push block 15 is gradually approached to the component station under the transmission of the bearing column 17. The three groups of fixed seats 18 are respectively fixed at the other three ends centered on the component station 8, thereby limiting and fixing the lateral direction of the component station, and the first compression spring 13 provides support for the rotation of the V-shaped block 11.

[0029] In this embodiment, the longitudinal fine-tuning assembly 6 includes a support column 20, a second compression spring 21, a transmission column 22 and a telescopic column 23. A through hole 24 is provided at the bottom of the component station 8 from top to bottom. The support column 20 passes through the through hole 24. One end of the transmission column 22 is connected to the middle end of the support column 20. The upper and lower ends of the support column 20 are press-fitted with the positioning seat 4 through the second compression spring 21. The middle end of the telescopic column 23 is provided with two layers of arc grooves 25 with different diameters. The telescopic column 23 passes through the positioning seat 4 horizontally, and the other end of the transmission column 22 is stuck in the arc groove 25. Rotating the telescopic column 23 causes the transmission column 22 to move back and forth in the two layers of the arc grooves 25, thereby driving the telescopic column 23 to telescope up and down. The support column 20 passes through the through hole 24, and is extended and retracted up and down through the transmission of the transmission column 22. The telescopic column 23 is rotated so that the transmission column 22 moves from one layer of the arc groove 25 to another layer of the arc groove 25. Since the depths of the two layers of the arc grooves are different, the transmission column 22 is driven to rise and fall according to the depth difference. The second compression spring 21 provides support for the lifting and lowering of the support column 20.

[0030] In this embodiment, the rotary positioning fixture further includes a pressing block 26, one end of which is connected to the top of the push block 15, and the pressing block 26 and the push block 15 are connected to form an L-shaped structure, and the pressing block 26 cooperates with the support column 20. When the push block 15 gradually approaches the support column 20, the support column 20 moves upward, and when lifting the parts, the pressing block 26 and the support column 20 just clamp the parts, thereby achieving the longitudinal direction of the part station 8. The depth difference between the two layers of the arc groove is exactly the height that the support column 20 needs to rise.

[0031] In this embodiment, the rotary positioning fixture also includes a pressure cover 27, the rear side end of the pressure cover 27 is hinged to the top end of the positioning seat 4, and buckles 28 are provided on both sides of the front side end of the pressure cover 27. The positioning seat 4 is provided with a positioning groove that cooperates with the buckle 28 to limit the position.

[0032] The rear side end of the pressure cover 27 is hinged to the top end of the positioning seat 4, and the pressure cover 27 can rotate around the hinged end. The buckle 28 is hinged to the front end of the pressure cover 27 and has a reset ability, which is equivalent to a floating effect. The buckle 28 cooperates with the positioning groove so that the buckle 28 is pressed and fixed on the positioning seat 4, ensuring that the pressure cover 27 fixes the product component in the positioning groove, so as to carry out welding work. A clearance gap is opened on the pressure cover 27, and the clearance gap provides a welding space.

[0033] In this embodiment, a plurality of soft blocks 29 are disposed at the bottom end of the pressure cover 27. When the pressure cover 27 is rotated and pressed downward, the soft blocks 29 are pressed against the product on the profiling groove 7. The soft blocks 29 include rubber blocks and silicone blocks. When the pressure cover 27 is rotated and pressed downward until the buckle 28 is buckled with the positioning groove, the soft blocks 29 are pressed against the product components on the profiling groove 7.

[0034] In this embodiment, the rotating seat 2 is a U-shaped structure, and the two ends of the rotating seat 2 are rotatably connected to the two ends of the mounting seat 1 through the bearing seat 16 respectively. The driving assembly 3 includes a servo motor 30, a synchronous belt 31, a driving wheel 32 and a driven wheel 33. The output shaft of the servo motor 30 is transmission-connected to the driving wheel 32. The synchronous belt 31 is arranged on the driving wheel 32 and the driven wheel 33. The driven wheel 33 is coaxially arranged with one of the bearing seats 16.

[0035] When the pressure cover 27 is rotated and pressed downward until the buckle 28 is engaged with the positioning groove, the servo motor 30 drives the driving wheel 32 to rotate, thereby driving the two ends of the rotating seat 2 to rotate around the bearing seat 16, providing a welding position.

[0036] In this embodiment, the rotary positioning fixture further includes a sensing sheet 34 and a photoelectric sensor 35. The sensing sheet 34 is connected to the lower end of the rotating seat 2, and the photoelectric sensor 35 is arranged on the mounting seat 1. The sensing sheet 34 cooperates with the electrical signal of the photoelectric sensor 35. When the sensing sheet 34 enters the sensing range of the photoelectric sensor 35, the rotating seat 2 stops rotating and detects whether the rotating seat 2 rotates to the welding position, so as to better control it.

[0037] Working principle of the present invention:

[0038] First, the operator opens the buckle 28 and rotates the pressure cover 27 around the hinged end, with the pressure cover 27 in an open state, and places two groups of product components on the two groups of contoured grooves 7 respectively, and places the parts on the support column 20 at the same time, and docks the two ends of the parts with the two groups of product components respectively;

[0039] Secondly, the plunger 10 is rotated, and the V-shaped block 11 is rotated horizontally at the rotating shaft 14 by the push of the plunger 10, and the bolt gradually moves from one end of the waist-shaped groove 19 to the other end of the waist-shaped groove 19, and the push block 15 is gradually approached to the support column 20 under the transmission of the bearing column 17, and the three groups of fixed seats 18 are respectively fixed at the other three ends centered on the component station 8, thereby limiting and fixing the component station 8 in the horizontal direction;

[0040] Then, the telescopic column 23 is rotated so that the transmission column 22 moves from one layer of the arc groove 25 to another layer of the arc groove 25, and the transmission column 22 is driven to rise according to the depth difference between the two groups of the arc grooves until the pressing block 26 and the supporting column 20 just clamp the component, thereby realizing the limit fixation of the component station 8 in the longitudinal direction;

[0041] Finally, the pressure cover 27 is rotated and pressed downward until the buckle 28 is engaged with the positioning groove, and the servo motor 30 drives the driving wheel 32 to rotate, thereby driving the two ends of the rotating seat 2 to rotate around the bearing seat 16. When the sensor sheet 34 enters the sensing range of the photoelectric sensor 35, the rotating seat 2 stops rotating, and the external welding equipment welds the joints between the parts and the product components.

Claims

1. A rotary positioning fixture, comprising a mounting seat, a rotating seat and a driving assembly arranged on the mounting seat, wherein both ends of the rotating seat are respectively rotatably connected to the mounting seat, and the output shaft of the driving assembly is coaxially arranged with the rotating seat, characterized in that: The rotary positioning fixture includes a positioning seat, a lateral fine-tuning component and a longitudinal fine-tuning component connected to the positioning seat. The positioning seat is arranged on the rotating seat. The positioning seat is provided with two groups of profiling grooves. A parts station is arranged between the two groups of profiling grooves. The parts station realizes three-dimensional positioning of parts through fine-tuning of the lateral fine-tuning component and the longitudinal fine-tuning component; the lateral fine-tuning component includes a connecting block, a plunger, a V-shaped block, a connecting column, a first compression spring, a rotating shaft, a push block, a bearing seat, a bearing column passing through the bearing seat, and Three groups of fixed seats, the connecting block, the rotating shaft, the connecting column and the bearing seat are connected to the bottom of the positioning seat in sequence, the intersection end of the V-shaped block is rotatably connected to the rotating shaft, the plunger passes through the connecting block and pushes and cooperates with the side end of one side of the V-shaped block, one side of the V-shaped block is provided with a waist-shaped groove, one end of the bearing column is movably arranged on the waist-shaped groove by a bolt, one end of the first compression spring is connected to the connecting column, the other end of the first compression spring is connected to a side of the V-shaped block close to the plunger, and the other end of the bearing column is connected to the side of the V-shaped block close to the plunger. One end is connected with the lower end of the push block, and the push block moves along one end of the component station through the rotation of the V-shaped block and the transmission of the bearing column, and the three groups of fixed seats are respectively fixed at the other three ends centered on the component station; the longitudinal fine-tuning component includes a support column, a second compression spring, a transmission column and a telescopic column, a through hole from top to bottom is opened at the bottom of the component station, the support column runs through the through hole, one end of the transmission column is connected to the middle end of the support column, and the upper and lower ends of the support column are both connected by the second compression spring. The spring is press-fitted with the positioning seat, and the middle end of the telescopic column is provided with two layers of arc grooves of different diameters. The telescopic column passes through the positioning seat horizontally, and the other end of the transmission column is clamped in the arc groove. The telescopic column is rotated to make the transmission column move back and forth in the two layers of the arc grooves, thereby driving the telescopic column to telescope up and down; the rotary positioning fixture also includes a pressure cover, the rear side end of the pressure cover is hinged to the top end of the positioning seat, and buckles are provided on both sides of the front side end of the pressure cover, and the positioning seat is provided with a positioning groove that cooperates with the buckle limit.

2. A rotary positioning fixture according to claim 1, characterized in that: The rotary positioning fixture also includes a pressing block, one end of which is connected to the top end of the pushing block, the pressing block and the pushing block are connected to form an L-shaped structure, and the pressing block cooperates with the supporting column.

3. A rotary positioning fixture according to claim 1, characterized in that: A plurality of soft blocks are arranged at the bottom end of the pressure cover. When the pressure cover is rotated and pressed downward, the soft blocks are pressed into engagement with the product components on the contoured groove.

4. A rotary positioning fixture according to claim 1, characterized in that: The rotating seat is in a U-shaped structure, and the two ends of the rotating seat are rotatably connected to the two ends of the mounting seat through the bearing seat respectively. The driving assembly includes a servo motor, a synchronous belt, a driving wheel and a driven wheel. The output shaft of the servo motor is transmission-connected to the driving wheel, the synchronous belt is arranged on the driving wheel and the driven wheel, and the driven wheel is coaxially arranged with one of the bearing seats.

5. The rotary positioning fixture according to claim 1, characterized in that: The rotary positioning fixture further includes a sensing sheet and a photoelectric sensor. The sensing sheet is connected to the lower end of the rotating seat. The photoelectric sensor is arranged on the mounting seat. The sensing sheet cooperates with the photoelectric sensor in electrical signals.

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