High-precision mechanical rotary table positioning mechanism

Abstract

The utility model discloses a high-precision mechanical rotary table positioning mechanism which comprises a base, a rotary table shaft core is arranged in the middle of the base, a rotary table shaft core sleeve is connected to the upper end of the rotary table shaft core in a sleeved mode, the upper portion of the rotary table shaft core sleeve is fixedly connected with a rotary table, a gear ring is arranged below the rotary table, and a positioning seat is arranged at the position, located on one side of the rotary table shaft core, of the upper portion of the base. An air cylinder mounting plate is arranged on the side, away from the rotary disc shaft core, of the positioning seat, an air cylinder assembly is fixedly mounted on the air cylinder mounting plate, a rotary disc tooth positioning block is arranged at the upper end of the positioning seat, a positioning rack is arranged on the side, close to the gear ring, of the rotary disc tooth positioning block, and a motor mounting seat is arranged on the side, away from the positioning seat, above the base. A motor is fixedly mounted at the lower end of the motor mounting seat, and a gear is arranged on a rotating shaft of the motor. The positioning mechanism is very high in positioning precision, simple to manufacture, low in cost, good in positioning rigidity and suitable for occasions with low cost and high precision.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical turntables, and particularly relates to a high-precision positioning mechanism for a mechanical turntable. Background Art

[0002] Turntables are widely used in mechanical process production to replace traditional production lines, so as to save space, improve efficiency, realize production automation, and save the increasing labor costs. Common turntables include different models such as double-axis and four-axis turntables. Each turntable has a rotating tabletop, and tooling fixtures can be assembled on the rotating tabletop, or operations such as perfusion and mold forming can be carried out. The positioning mechanism of existing precision turntables mainly performs feedback positioning through airtightness detection inside parts. Although it has the beneficial effect of accurate positioning, this requires not only considering accuracy when installing the equipment, but also optimizing the airtightness of the device detection position at the same time. The performance is not stable enough and the manufacturing cost is high. For this reason, we propose a high-precision positioning mechanism for a mechanical turntable. Content of the Utility Model

[0003] In order to solve the above problems, the utility model provides a high-precision positioning mechanism for a mechanical turntable. The utility model solves the problem that the positioning mechanism of existing precision turntables mainly performs feedback positioning through airtightness detection inside parts. Although it has the beneficial effect of accurate positioning, this requires not only considering accuracy when installing the equipment, but also optimizing the airtightness of the device detection position at the same time. The performance is not stable enough and the manufacturing cost is high.

[0004] A high-precision positioning mechanism for a mechanical turntable in the utility model includes a base. A turntable shaft core is arranged in the middle of the base. A turntable shaft core sleeve is sleeved on the upper end of the turntable shaft core. The upper part of the turntable shaft core sleeve is fixedly connected with a turntable. A toothed ring is arranged below the turntable. A positioning seat is arranged above the base on one side of the turntable shaft core. A cylinder mounting plate is arranged on the side of the positioning seat far away from the turntable shaft core. A cylinder assembly is fixedly installed on the cylinder mounting plate. A turntable tooth positioning block is arranged at the upper end of the positioning seat. A positioning rack is arranged on the side of the turntable tooth positioning block close to the toothed ring. A motor mounting seat is arranged above the base on the side far away from the positioning seat. A motor is fixedly installed at the lower end of the motor mounting seat. A gear is arranged on the rotating shaft of the motor.

[0005] In the above scheme, the cylinder assembly includes a shell. The shell is fixedly connected with the positioning seat. A piston is arranged in the middle of the shell. The piston is fixedly connected with a piston rod on the side close to the toothed ring. An air outlet right-angle air joint is arranged on the side of the shell where the piston rod is close to the toothed ring. An air inlet right-angle air joint is arranged on the side of the shell where the piston rod is far away from the toothed ring.

[0006] In the above scheme, the piston rod is fixedly connected with the turntable tooth positioning block through an inner hexagon bolt.

[0007] In the above solution, a tapered roller bearing is provided between the turntable shaft core and the turntable shaft core sleeve.

[0008] In the above solution, a pressing plate is provided above the positioning seat and located above the turntable tooth positioning block.

[0009] In the above solution, a plurality of mounting holes arranged in a matrix are provided on the outer side of the base.

[0010] The advantages and beneficial effects of the present utility model are as follows: The present utility model provides a high-precision mechanical turntable positioning mechanism. The turntable is installed on the turntable core shaft through the turntable shaft core sleeve. The turntable can rotate around the turntable core shaft through the tapered roller bearing. The cylinder assembly pushes the turntable tooth positioning block. The turntable tooth positioning block and the tooth ring are positioned by meshing teeth with the same module. When the turntable tooth positioning block moves backward, the originally meshed teeth of the turntable tooth positioning block and the tooth ring are completely disengaged. The motor can rotate a turntable tooth positioning block according to the program, and then the cylinder assembly is used to push the turntable tooth positioning block forward to mesh with the corresponding tooth of the tooth ring, thus completing one indexing and precise positioning. This kind of positioning mechanism has very high positioning accuracy, is simple to manufacture, has low cost, good positioning rigidity, and is suitable for occasions with low cost and low to medium precision. Description of the Drawings

[0011] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to 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 of 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.

[0012] Figure 1 is a structural schematic diagram of the present utility model;

[0013] Figure 2 is a structural schematic diagram of the present utility model after removing the turntable;

[0014] Figure 3 is a cross-sectional view of the present utility model;

[0015] Figure 4 is a structural schematic diagram of part A of the present utility model.

[0016] In the figure: 1, base; 2, turntable shaft core; 3, turntable shaft core sleeve; 4, turntable; 5, positioning seat; 6, cylinder mounting plate; 7, cylinder assembly; 71, housing; 72, piston; 73, piston rod; 74, outlet right-angle air joint; 75, inlet right-angle air joint; 8, tapered roller bearing; 9, mounting hole; 10, gear; 11, turntable tooth positioning block; 12, positioning rack; 13, hexagon socket head cap screw; 14, pressing plate; 15, tooth ring; 16, motor mounting seat; 17, motor. Specific embodiments

[0017] The following combines the drawings and embodiments to further describe the specific embodiments of the present invention. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0018] As Figures 1-4 shown, the present invention is a high-precision mechanical turntable positioning mechanism, including a base 1. A turntable shaft core 2 is provided in the middle of the base 1. A turntable shaft core sleeve 3 is sleeved on the upper end of the turntable shaft core 2. The upper part of the turntable shaft core sleeve 3 is fixedly connected to a turntable 4. The turntable 4 is installed on the turntable core shaft 2 through the turntable shaft core sleeve 3. The turntable 4 can rotate around the turntable core shaft 2 through a tapered roller bearing 8. A tooth ring 15 is provided below the turntable 4. A positioning seat 5 is provided above the base 1 on one side of the turntable shaft core 2. A cylinder mounting plate 6 is provided on the side of the positioning seat 5 away from the turntable shaft core 2. A cylinder assembly 7 is fixedly installed on the cylinder mounting plate 6. A turntable tooth positioning block 11 is provided at the upper end of the positioning seat 5. The turntable tooth positioning block 11 is movably connected to the positioning seat 5. A positioning rack 12 is provided on the side of the turntable tooth positioning block 11 close to the tooth ring 15. When the cylinder assembly 7 works, the cylinder assembly 7 can push the turntable tooth positioning block 11 to move in the horizontal direction. Through the transmission of the turntable tooth positioning block 11, the positioning rack 12 can move in the horizontal direction. The positioning rack 12 is entirely inserted into the tooth ring 15. Through the mutual cooperation between the positioning rack 12 and the tooth ring 15, the positioning purpose of the tooth ring 15 can be achieved. A motor mounting seat 16 is provided above the base 1 on the side away from the positioning seat 5. A motor 17 is fixedly installed at the lower end of the motor mounting seat 16. A gear 10 is provided on the rotating shaft of the motor 17. When the motor 17 works, the motor 17 drives the gear 10 to rotate. Through the mutual cooperation between the gear 10 and the tooth ring 15, the tooth ring 15 can drive the turntable 4 to rotate.

[0019] The cylinder assembly 7 includes a housing 71, the housing 71 is fixedly connected to the positioning seat 5, a piston 72 is provided in the middle of the housing 71, the piston 72 can move horizontally inside the housing 71, one side of the piston 72 close to the gear ring 15 is fixedly connected to a piston rod 73, an air outlet right-angle air joint 74 is provided on the housing 71 on the side of the piston rod 73 close to the gear ring 15, an air inlet right-angle air joint 75 is provided on the housing 71 on the side of the piston rod 73 away from the gear ring 15, the air inlet right-angle air joint 75 and the air outlet right-angle air joint 74 are respectively connected to the air inlet pipe and the air outlet pipe, through the mutual cooperation between the air inlet right-angle air joint 75 and the air outlet right-angle air joint 74, the piston 72 can drive the piston rod 73 to move horizontally, and through the transmission of the piston rod 73, the turntable tooth positioning block 11 also moves accordingly.

[0020] The piston rod 73 and the turntable tooth positioning block 11 are fixedly connected by an inner hexagon bolt 13.

[0021] A tapered roller bearing 8 is provided between the turntable shaft core 2 and the turntable shaft core sleeve 3, and the setting of the tapered roller bearing 8 enables the turntable shaft core sleeve 3 to rotate outside the turntable shaft core 2.

[0022] A pressing plate 14 is provided on the positioning seat 5 above the turntable tooth positioning block 11, and the pressing plate 14 can limit the turntable tooth positioning block 11, so that the turntable tooth positioning block 11 can move stably in the horizontal direction.

[0023] A plurality of mounting holes 9 arranged in a matrix are provided on the outside of the base 1, and the positioning mechanism can be fixedly installed through the mounting holes 9.

[0024] Specifically, in the present utility model, the turntable 4 is installed on the turntable core shaft 2 through the turntable shaft core sleeve 3, and the turntable 4 can rotate around the turntable core shaft 2 through the tapered roller bearing 8. When the motor 17 is working, the motor 17 drives the gear 10 to rotate. Through the mutual cooperation between the gear 10 and the gear ring 15, the gear ring 15 can drive the turntable 4 to rotate. The air inlet right-angle air joint 75 and the air outlet right-angle air joint 74 are respectively connected to the air inlet pipe and the air outlet pipe. Through the mutual cooperation between the air inlet right-angle air joint 75 and the air outlet right-angle air joint 74, the piston 72 can drive the piston rod 73 to move horizontally. Through the transmission of the piston rod 73, the turntable tooth positioning block 11 also moves accordingly. Before the motor 17 works, the cylinder assembly 7 pushes the turntable tooth positioning block 11, and the turntable tooth positioning block 11 and the gear ring 15 are meshed and positioned by teeth of the same modulus. When the turntable tooth positioning block 11 moves backward, the teeth originally meshed between the turntable tooth positioning block 11 and the gear ring 15 are completely disengaged. The motor 17 can rotate one turntable tooth positioning block 11 according to the program, and then the cylinder assembly 7 is used to push the turntable tooth positioning block 11 forward to mesh with the corresponding teeth of the gear ring 15, and thus one indexing and precise positioning can be completed.

[0025] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A high-precision mechanical turntable positioning mechanism, comprising a base (1), characterized in that: A turntable shaft core (2) is provided in the middle of the base (1), a turntable shaft core sleeve (3) is sleeved on the upper end of the turntable shaft core (2), the upper end of the turntable shaft core sleeve (3) is fixedly connected to the turntable (4), a gear ring (15) is provided below the turntable (4), a positioning seat (5) is provided above the base (1) on one side of the turntable shaft core (2), a cylinder mounting plate (6) is provided on the side of the positioning seat (5) away from the turntable shaft core (2), a cylinder assembly (7) is fixedly mounted on the cylinder mounting plate (6), a turntable tooth positioning block (11) is provided at the upper end of the positioning seat (5), a positioning rack (12) is provided on the side of the turntable tooth positioning block (11) close to the gear ring (15), a motor mounting seat (16) is provided above the base (1) on the side away from the positioning seat (5), a motor (17) is fixedly mounted on the lower end of the motor mounting seat (16), and a gear (10) is provided on the rotating shaft of the motor (17).

2. A high-precision mechanical turntable positioning mechanism according to claim 1, characterized in that: The cylinder assembly (7) comprises a shell (71), the shell (71) is fixedly connected to the positioning seat (5), a piston (72) is provided in the middle of the shell (71), the piston (72) is fixedly connected to the piston rod (73) on the side close to the gear ring (15), an outlet right-angle gas joint (74) is provided on the shell (71) on the side close to the gear ring (15) of the piston rod (73), and an inlet right-angle gas joint (75) is provided on the shell (71) on the side away from the gear ring (15) of the piston rod (73).

3. A high-precision mechanical turntable positioning mechanism according to claim 2, characterized in that: The piston rod (73) is fixedly connected to the turntable tooth positioning block (11) via a hexagon socket bolt (13).

4. The high-precision mechanical turntable positioning mechanism according to claim 1, characterized in that: A tapered roller bearing (8) is provided between the turntable shaft core (2) and the turntable shaft core sleeve (3).

5. The high-precision mechanical turntable positioning mechanism according to claim 1, characterized in that: The positioning seat (5) is provided with a pressing plate (14) above the turntable tooth positioning block (11).

6. The high-precision mechanical turntable positioning mechanism according to claim 1, characterized in that: The outer side of the base (1) is provided with a plurality of mounting holes (9) arranged in a matrix.

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