Automatic clamp rotary table

Abstract

The utility model discloses an automatic clamp rotary table which comprises a fixed seat, a rotary seat and a clamp seat. A round downward concave position is formed in the center of the fixing base to form a rotating base groove, a rotating base of a disc structure is arranged in the rotating base groove in a rotating fit mode, a center column of a cylindrical structure is arranged in the center of the lower portion of the rotating base, a hole position for the center column to be inserted in a rotating fit mode is formed in the center of the rotating base groove to form a center hole, and the bottom of the center hole is open. A central bearing concentric with the central column is arranged below the opening, a gear shaft is rotationally matched in the central bearing, and the upper part of the gear shaft is fixedly inserted into the central column; a gear is concentrically embedded and fixed outside the gear shaft; a servo electric cylinder is fixed below the fixing seat through an electric cylinder support, a rack is fixed at the telescopic end of the servo electric cylinder, and the rack is meshed with the gear; a clamp base is detachably connected to the rotating base, and a clamp is fixed to the clamp base. The method has the beneficial effects of wide application range; the rotation is stable.

Description

Technical Field

[0001] The utility model belongs to the technical field of machining, and particularly relates to an automatic fixture turntable. Background Art

[0002] When machining some workpieces, it is necessary to machine multiple angles of the workpiece. At this time, the workpiece can be fixed on the fixture turntable, and then by rotating the turntable, the workpiece is rotated to a specific angle for machining.

[0003] The Chinese patent document with the publication number CN219403312U discloses a fixture positioning turntable, which only relies on two clamping plates (labeled 11 in the comparative document) to clamp the workpiece. Therefore, it is necessary to ensure that the two surfaces of the workpiece being clamped are parallel planes, resulting in a relatively single type of workpiece that can be clamped by the comparative document. However, most of the workpieces that need to be machined at multiple angles are irregular workpieces. Therefore, the above-mentioned comparative technical document cannot meet most of the clamping requirements when dealing with most irregular workpieces. Therefore, the existing technology needs a multi-angle machining fixture turntable suitable for most workpieces. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an automatic fixture turntable to solve the technical problem that the types of workpieces that can be clamped by the above background art are relatively single.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions:

[0006] An automatic fixture turntable includes: a fixed seat, a rotating seat, and a fixture seat; a circular downward concave position is provided at the center of the fixed seat to form a rotating seat groove. A rotating seat with a disc structure is rotatably fitted in the rotating seat groove. A cylindrical central column is provided at the center of the lower part of the rotating seat. A hole for the central column to be rotatably fitted and inserted is provided at the center of the rotating seat groove to form a central hole. The bottom of the central hole is open, and a central bearing concentric with the central column is provided below the opening. A gear shaft is rotatably fitted in the central bearing, and the upper part of the gear shaft is fixedly inserted into the central column; a gear is fixedly embedded concentrically outside the gear shaft; a servo electric cylinder is fixed below the fixed seat by an electric cylinder bracket, and a rack is fixed to the telescopic end of the servo electric cylinder. The rack and the gear are meshed with each other; a fixture seat is detachably connected to the rotating seat, and a fixture is fixed on the fixture seat.

[0007] Furthermore: In order to facilitate replacing different fixture seats according to the fixture, a horizontally arranged embedded block with a plate structure is fixed to the bottom of the fixture seat through a vertical plate. An embedded groove for the horizontal sliding and embedding of the embedded block and the vertical plate thereon is provided in the rotating seat. After the embedded block is slid into the embedded groove, bolts are screwed into the side or bottom of the embedded groove to clamp and fix the embedded block.

[0008] Further: To facilitate infinite-position blocking when the embedded block is inserted into the embedded slot, a side opening is provided on one side of the rotating seat groove of the fixed seat, and the side opening can expose the side surface of the rotating seat.

[0009] Further: To increase the rotation smoothness and stability between the rotating seat groove and the rotating seat, a ring-shaped bead holder with a ring structure is provided on the lower surface of the rotating seat. A number of balls are embedded in the circumferential bottom of the ring-shaped bead holder. The balls are in spherical rolling fit with the ring-shaped bead holder. An annular track for all the balls to roll around the center circumference of the rotating seat is provided on the rotating seat groove to form a ball groove.

[0010] Further: To increase the meshing tightness of the rack and the gear and prevent the rack from deflecting and disengaging the teeth due to the rotational load, an anti-disengaging tooth mechanism is provided on the fixed seat. The main body of the anti-disengaging tooth mechanism is a bracket and a limiting bearing. The axis line of the limiting bearing is parallel to the axis line of the gear. The limiting bearing is attached to the side of the rack away from the gear. The rack and the limiting bearing are in rolling fit. A sliding column is fixed at the center of the limiting bearing, and the sliding column is fixed to the bracket by a locking bolt.

[0011] Further: To enable the limiting bearing to be closely attached to the rack, an elastic wheel sleeve is fixedly covered on the outer circumferential wall of the limiting bearing, and the elastic wheel sleeve is in elastic interference fit between the limiting bearing and the rack.

[0012] Further: To be able to change the distance between the limiting bearing and the rack according to the thickness of the elastic wheel sleeve and also to facilitate the replacement of the elastic wheel sleeve as a consumable, the part of the bracket connected to the locking bolt is a notch counterbore.

[0013] Further: To prevent slipping between the gear shaft and the jack during rotation, a key is fixed on the outer circumference of the gear shaft in cooperation with the jack, and a strip-shaped vertical groove for the key to be embedded is provided on the jack.

[0014] Further: To be able to visually observe the deflection angle of the rotating seat, an indicating arrow is provided on the rotating seat, and annularly distributed angle scale lines are provided on the side of the fixed seat away from the side opening.

[0015] Further: To be able to adjust the angle of the fixture and at the same time adjust the height of the fixture, a lifting platform is fixedly connected to the lower part of the fixed seat by feet.

[0016] In summary, the present utility model has the following beneficial effects:

[0017] ①Wide application range: By setting up a detachable fixture base, the required fixture and its matching fixture base can be selected according to different types of parts. Through an external servo controller, the opening of the embedded groove is rotated to the side opening of the turret groove, the limit on the opening of the embedded groove is cancelled, and then the old fixture base is taken out from the embedded groove. A new fixture base is replaced. The embedded block at the bottom of the new fixture base is inserted into the designated position in the embedded groove of the turret, and then bolts are screwed into the side or bottom of the embedded groove to clamp and fix the embedded block. Then, the fixture is fixed on the fixture base by bolts or buckles. The fixture is used to clamp parts for processing, and the weight of the fixture is not limited. Compared with the prior art, more types of workpieces can be processed, and the application range of this application is wider.

[0018] ②Smooth rotation: By setting up balls and ball grooves, when the turret rotates, the balls at the bottom of the turret roll in the ball grooves, providing rolling support for the rotation of the turret and ensuring the smoothness of the turret rotation. Brief description of the drawings

[0019] Figure 1 is the overall structural schematic diagram of the present utility model;

[0020] Figure 2 is the bottom structural schematic diagram of the present utility model;

[0021] Figure 3 is Figure 2 the enlarged view of the structure at A in

[0022] Figure 4 is the bottom structural schematic diagram of the turret in the present utility model;

[0023] Figure 5 is the structural schematic diagram of the turret groove in the present utility model;

[0024] Figure 6 is the installation structural schematic diagram of the fixture and the fixture base in the present utility model;

[0025] Figure 7 is the matching structural schematic diagram of the lifting table in the present utility model;

[0026] In the figure, 1, fixed seat; 2, turret groove; 3, turret; 4, fixture base; 5, fixture; 6, servo cylinder; 7, rack; 8, gear; 9, anti - tooth - falling mechanism; 10, lifting table; 11, support feet; 12, angle scale line; 13, indicating arrow; 21, ball groove; 22, central bearing; 23, central hole; 24, side opening; 31, central column; 32, jack; 33, annular bead holder; 34, ball; 35, embedded groove; 41, embedded block; 61, cylinder support; 81, gear shaft; 82, key; 91, support; 92, countersunk hole in the groove; 93, sliding column; 94, limit bearing; 95, elastic wheel sleeve; 96, locking bolt. Detailed implementation mode

[0027] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0028] Embodiment:

[0029] Please refer to Figures 1-7 , the present utility model provides a technical solution:

[0030] An automatic fixture turntable, comprising: a fixed seat 1, a rotating seat 3, and a fixture seat 4; a circular downward concave position is provided at the center of the fixed seat 1 to form a rotating seat groove 2, a rotating seat 3 with a disc structure is rotatably fitted in the rotating seat groove 2, a cylindrical central column 31 is provided at the center below the rotating seat 3, a hole position for the central column 31 to be rotatably fitted and inserted is provided at the center of the rotating seat groove 2 to form a central hole 23, the bottom of the central hole 23 is open, a central bearing 22 concentric with the central column 31 is provided below the opening, a gear shaft 81 is rotatably fitted in the central bearing 22, and the upper part of the gear shaft 81 is fixedly inserted into the central column 31; a gear 8 is fixedly embedded concentrically outside the gear shaft 81; a servo cylinder 6 is fixed below the fixed seat 1 by an electric cylinder bracket 61, a rack 7 is fixed to the telescopic end of the servo cylinder 6, and the rack 7 and the gear 8 are meshed with each other; a fixture seat 4 is detachably connected to the rotating seat 3, and a fixture 5 is fixed on the fixture seat 4.

[0031] In order to facilitate replacing different fixture seats 4 according to the fixture, a horizontal plate structure inner embedding block 41 is fixed to the bottom of the fixture seat 4 through a vertical plate, an inner embedding groove 35 for the inner embedding block 41 and the vertical plate thereon to slide horizontally and be embedded is provided in the rotating seat 3, after the inner embedding block 41 slides and inserts into the inner embedding groove 35, bolts are screwed into the side or bottom of the inner embedding groove 35 to clamp and fix the inner embedding block 41.

[0032] In order to facilitate the inner embedding block 41 to be embedded into the inner embedding groove 35 without any position-blocking, a side opening 24 is provided on one side of the rotating seat groove 2 of the fixed seat 1, and the side surface of the rotating seat 3 can be exposed through the side opening 24.

[0033] In order to increase the rotation smoothness and stability of the rotating seat groove 2 and the rotating seat 3, an annular bead holder 33 with an annular structure is provided on the lower surface of the rotating seat 3, a plurality of balls 34 are embedded in the bottom circumference of the annular bead holder 33, the balls 34 and the annular bead holder 33 are in spherical rolling fit, and an annular track for all the balls 34 to roll around the center circumference of the rotating seat 3 is provided on the rotating seat groove 2 to form a ball groove 21.

[0034] To increase the meshing tightness of the rack 7 and the gear 8 and prevent the rack 7 from deflecting and disengaging from the teeth due to the rotational load, an anti-tooth-disengagement mechanism 9 is provided on the fixed seat 1. The main body of the anti-tooth-disengagement mechanism 9 is a bracket 91 and a limit bearing 94. The axis line of the limit bearing 94 is parallel to the axis line of the gear 8. The limit bearing 94 is attached to the side of the rack 7 away from the gear 8. The rack 7 and the limit bearing 94 are in rolling contact. A sliding column 93 is fixed at the center of the limit bearing 94, and the sliding column 93 is fixed to the bracket 91 by a locking bolt 96.

[0035] To enable the limit bearing 94 to be closely attached to the rack 7, an elastic wheel sleeve 95 is fixedly covered on the outer circumferential wall of the limit bearing 94, and the elastic wheel sleeve 95 is in elastic interference fit between the limit bearing 94 and the rack 7.

[0036] To be able to change the distance between the limit bearing 94 and the rack 7 according to the thickness of the elastic wheel sleeve 95 and also to facilitate the replacement of the elastic wheel sleeve 95 as a consumable, the part of the bracket 91 connected to the locking bolt 96 is a notch counterbore 92.

[0037] To prevent the rotation and slipping between the gear shaft 81 and the jack 32, a key 82 is fixed on the outer circumference of the gear shaft 81 in cooperation with the jack 32, and a strip-shaped vertical groove for the key 82 to be embedded is provided on the jack 32.

[0038] To be able to visually observe the deflection angle of the rotating seat 3, an indicating arrow 13 is provided on the rotating seat 3, and angular scale lines 12 are annularly distributed on the side of the fixed seat 1 away from the side opening 24.

[0039] To be able to adjust the angle of the fixture 5 and also adjust the height of the fixture, a lifting table 10 is fixedly connected to the lower part of the fixed seat 1 by a support leg 11 (the lifting table 10 is not within the protection scope of this application. In this application, as long as the lifting table can achieve the lifting function, it may be applied in this application, so the specific structure and working principle of the lifting table 10 are omitted. Its reference structure can be found in the lifting workbench shown in CN105124920A).

[0040] Brief description of the usage process:

[0041] During use, select the fixture 5 to be used and its matching fixture seat 4 (because this application can process different types of parts, and the fixtures for different types of parts are different, so the specific structure of the fixture 5 in this application is not limited, and the specific structure and working principle of the fixture 5 are not within the protection scope of this application); first insert the inlaid block 41 at the bottom of the fixture seat 4 into the designated position in the inlaid groove 35 of the rotating seat 3, then screw in bolts on the side or bottom of the inlaid groove 35 to clamp and fix the inlaid block 41, and then fix the fixture 5 to the fixture seat 4 by bolts or buckles. The fixture 5 is used to clamp the parts for processing.

[0042] When the angle of the fixture 5 needs to be adjusted, a servo controller is connected to the servo cylinder 6. The external servo controller controls the extension or shortening of the telescopic end of the servo cylinder 6. The telescopic end of the servo cylinder 6 drives the rack 7 to translate relative to the gear 8. Because the rack 7 and the gear 8 are in a meshing state with each other, the rack 7 drives the gear 8 to rotate. Then, the rotating gear 8 drives the center column 31 and the swivel seat 3 to rotate around their axis through the gear shaft 81, thereby driving the base 4 and the fixture 5 installed on the swivel seat 3 to rotate as a whole, thereby changing the angle of the fixture 5.

[0043] When the rotating seat 3 rotates, the balls 34 at the bottom of the rotating seat 3 roll in the ball grooves 21 , providing rolling support for the rotation of the rotating seat 3 and ensuring the stability of the rotation of the rotating seat 3 .

[0044] The limit bearing 94 in the anti-tooth-off mechanism 9 is used to limit the deflection and bending of the limit rack 7, ensure the meshing tightness of the rack 7 and the gear 8, and prevent the rack 7 from deflecting and toothing due to the rotational load. When it is necessary to change the distance between the limit bearing 94 and the rack 7 according to the thickness of the elastic wheel sleeve 95, or replace the elastic wheel sleeve 95 as a consumable, loosen the locking bolt 96, and slide the locking bolt 96 in the slot countersunk hole 92 to adjust the distance between the limit bearing 94, the sliding column 93 as a whole and the rack 7, then replace the new elastic wheel sleeve 95, and then push the limit bearing 94 and the sliding column 93 as a whole toward the rack 7, so that the elastic wheel sleeve 95 is compressed and elastically interference fit between the limit bearing 94 and the rack 7; then re-lock the locking bolt 96 to complete the adjustment of the distance between the limit bearing 94 and the rack 7.

[0045] The indicating arrow 13 is used to cooperate with the angle scale line 12 to indicate the actual deflection angle of the rotating seat 3 in real time, so as to facilitate the staff to adjust or correct the angle of the rotating seat 3.

[0046] Because the embedded groove 35 will sometimes be blocked by the fixing seat 1 at the angle scale line 12, when the clamp seat 4 needs to be replaced, it will be limited by the fixing seat 1 at the angle scale line 12. Therefore, when replacing the clamp seat 4, it is necessary to rotate the opening of the embedded groove 35 to the side opening 24 of the rotating seat groove 2 through an external servo controller to cancel the limitation on the opening of the embedded groove 35, and then take the old clamp seat 4 out of the embedded groove 35 and replace it with a new clamp seat 4.

[0047] The lifting platform 10 can raise or lower the overall height of the fixed seat 1, the rotating seat 3, the clamp seat 4, and the clamp 5 to achieve height adjustment of the clamp.

[0048] This specific embodiment is only an interpretation of the present utility model, and it is not a limitation to the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment that do not contribute creatively as needed, but as long as it is within the scope of the claims of the present utility model, it is protected by the patent law.

Claims

1. An automated fixture turntable, comprising: Fixed seat (1), rotating seat (3), fixture seat (4); characterized in that: a circular downward concave position is provided at the center of the fixed seat (1) to form a rotating seat groove (2), a rotating seat (3) with a disc structure is rotatably fitted in the rotating seat groove (2), a cylindrical central column (31) is provided at the center of the lower part of the rotating seat (3), a hole for the central column (31) to be rotatably fitted and inserted is provided at the center of the rotating seat groove (2) to form a central hole (23), the bottom of the central hole (23) is open, a central bearing (22) concentric with the central column (31) is provided below the opening, a gear shaft (81) is rotatably fitted in the central bearing (22), and the upper part of the gear shaft (81) is fixedly inserted into the central column (31); a gear (8) is fixedly embedded concentrically outside the gear shaft (81); a servo cylinder (6) is fixed below the fixed seat (1) by an electric cylinder bracket (61), a rack (7) is fixed to the telescopic end of the servo cylinder (6), and the rack (7) and the gear (8) are meshed with each other; a fixture seat (4) is detachably connected to the rotating seat (3), and a fixture (5) is fixed to the fixture seat (4).

2. The automated fixture turntable according to claim 1, wherein: A horizontal plate structure inner embedding block (41) is fixed to the bottom of the fixture seat (4) through a vertical plate, and an inner embedding groove (35) for the inner embedding block (41) and the vertical plate thereon to slide horizontally is provided in the rotating seat (3). After the inner embedding block (41) is slidably inserted into the inner embedding groove (35), bolts are screwed into the side or bottom of the inner embedding groove (35) to clamp and fix the inner embedding block (41).

3. An automated fixture turntable according to claim 1, characterized in that: The fixed seat (1) is provided with a side opening (24) on one side of the rotating seat groove (2), and the side opening (24) can expose the side surface of the rotating seat (3).

4. An automated fixture turntable according to claim 1, wherein: A ring-shaped bead holder (33) with a ring structure is provided on the lower surface of the rotating seat (3), a plurality of balls (34) are embedded in the bottom circumference of the ring-shaped bead holder (33), the balls (34) and the ring-shaped bead holder (33) are in spherical rolling fit, and a ring-shaped track for all the balls (34) to roll around the center circumference of the rotating seat (3) is provided on the rotating seat groove (2) to form a ball groove (21).

5. An automated fixture turntable according to claim 1, characterized in that: An anti-disengaging tooth mechanism (9) is provided on the fixed seat (1), the main body of the anti-disengaging tooth mechanism (9) is a bracket (91) and a limit bearing (94), the axis line of the limit bearing (94) is parallel to the axis line of the gear (8), the limit bearing (94) is attached to the side of the rack (7) away from the gear (8), the rack (7) and the limit bearing (94) are in rolling fit, a sliding column (93) is fixed to the center of the limit bearing (94), and the sliding column (93) is fixed to the bracket (91) by a locking bolt (96).

6. An automated fixture turntable according to claim 5, characterized in that: An elastic wheel sleeve (95) is fixedly covered on the outer circumferential wall of the limit bearing (94), and the elastic wheel sleeve (95) is in elastic interference fit between the limit bearing (94) and the rack (7).

7. An automated fixture turntable according to claim 6, characterized in that: The part of the bracket (91) connected to the locking bolt (96) is a notch counterbore (92).

8. An automated fixture turntable according to claim 1, characterized in that: A key (82) is fixed to the outer circumference of the gear shaft (81) in cooperation with the jack (32), and a strip-shaped vertical groove for the key (82) to be embedded is provided on the jack (32).

9. The automated fixture turntable according to claim 1, characterized in that: An indicating arrow (13) is provided on the transposon (3), and angular scale lines (12) distributed in a ring are provided on one side of the fixed seat (1) away from the side opening (24).

10. An automated fixture turntable according to claim 1, characterized in that: A lifting platform is fixedly connected below the fixed seat (1) by a supporting leg (11).

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