Worm gear rotary table

Abstract

The utility model discloses a worm gear rotary table, which relates to the technical field of mechanical transmission, and comprises a machine base, a rotary table, a worm gear, a worm, a fixed seat, a plane bearing, a motor, a locking seat, a holding hoop, a spring, a movable oil duct, an ejector head, an injection oil duct and a communication oil duct, the worm is rotationally connected into the machine base, the worm gear is connected with the worm in a meshed mode, the pitch of the middle section of the worm is slightly larger than the pitch of the two ends, the fixing base is fixed to one side of the machine base, the pitch of the middle section of the worm is slightly larger than the pitch of the two ends, and the thickness size of a plane bearing is allowed to be replaced. According to the technical scheme, the meshing area of the worm and the worm gear can be flexibly adjusted, so that the small-pitch area of the worm is in meshing connection with the worm gear, the problem that the fit clearance is increased due to abrasion is effectively solved, the transmission precision and stability are remarkably improved, and noise and vibration are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical transmission, and particularly relates to a worm wheel turntable. Background Technique

[0002] In the fields of industrial automation and precision machinery, as a common rotary transmission device, the worm wheel turntable is widely used in occasions that require precise control of the rotation angle and position. In the traditional worm wheel turntable, during the long-term transmission process between the worm wheel and the worm, due to wear, the fit clearance increases, which in turn affects the transmission accuracy and stability, and even generates noise and vibration, shortening its service life. Therefore, we propose a worm wheel turntable. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a worm wheel turntable, which solves the problems put forward in the above background technique.

[0004] To achieve the above purposes, the utility model is realized through the following technical solutions: A worm wheel turntable, comprising:

[0005] A machine base;

[0006] A turntable, which is rotatably connected to the upper part of the machine base;

[0007] A worm wheel, which is fixed to the lower part of the turntable;

[0008] A worm, which is rotatably connected to the inside of the machine base, and the worm wheel and the worm are meshed, and the pitch of the middle section of the worm is slightly larger than the pitch dimensions at both ends;

[0009] A fixing seat, which is fixed to one side of the machine base;

[0010] A plain bearing, which is fixed between the worm and the fixing seat, and the meshing area between the worm and the worm wheel can be adjusted by changing the thickness dimension of the plain bearing.

[0011] Further, the worm wheel turntable further comprises:

[0012] A motor, which is fixed to the other side of the machine base, and the output end of the motor is connected to one end of the worm through a coupling.

[0013] Further, the worm wheel turntable further comprises:

[0014] A locking seat, which is fixed to the lower part of the turntable, penetrates through the middle of the worm wheel and is located inside the machine base;

[0015] Further, the worm wheel turntable further comprises:

[0016] A clamping hoop, which is installed at the bottom of the machine base and is located outside the locking seat;

[0017] A spring is fixed to the open end of the clamping hoop.

[0018] Furthermore, the worm gear rotary table also includes:

[0019] Active oil passages, two groups of active oil passages are provided at the lower part of the machine base;

[0020] The two groups of plugs are slidably connected inside the movable oil channel, and the two groups of plugs are respectively located at both sides of the opening end of the clamping hoop.

[0021] Furthermore, the worm gear rotary table also includes:

[0022] An oil injection channel, wherein the oil injection channel is provided on the side wall of the machine base, and the oil injection channel and a group of mandrels are in a communicating structure;

[0023] The connecting oil passage is arranged on the side wall of the machine base, and the connecting oil passage and the two sets of plugs are a connecting structure.

[0024] Compared with the above-mentioned background technology, the worm gear rotary table provided in the present application includes a machine base, a rotary table, a worm wheel, a worm, a fixed seat and a plane bearing. Since the worm and the fixed seat are rotationally connected through the plane bearing, the pitch of the middle section of the worm is slightly larger than the pitch size at both ends, and then the thickness size of the plane bearing is replaced to adjust the meshing area of ​​the worm and the worm wheel, so that the area with a smaller pitch of the worm is meshed and connected with the worm wheel.

[0025] The utility model provides a worm gear rotary table. Compared with the prior art, it has the following beneficial effects:

[0026] 1. A worm gear rotary table, in which the pitch of the middle section of the worm is slightly larger than the pitch of the two ends, and the thickness of the plane bearing is allowed to be replaced. This technical solution can flexibly adjust the meshing area of ​​the worm and the worm wheel, so that the area with a smaller pitch of the worm is meshed and connected with the worm wheel, effectively compensating for the increase of the fitting clearance caused by wear, significantly improving the transmission accuracy and stability, and reducing the generation of noise and vibration.

[0027] 2. A worm gear rotary table forms a hydraulic oil channel through two sets of active oil channels, an injection oil channel and a connecting oil channel. The combined design of the hydraulic oil channel, the spring and the clamping hoop realizes the rapid locking and unlocking of the rotary table angle. The user only needs to fill the injection oil channel with oil to achieve the firm locking of the locking seat by the clamping hoop; after the oil filling stops, the elastic force of the spring automatically pushes the clamping hoop to reset and release the lock. The structure is easy to operate and responds quickly, which improves the flexibility of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1It is a schematic structural diagram of a worm wheel turntable;

[0029] Figure 2 It is a schematic exploded view of a worm wheel turntable;

[0030] Figure 3 It is a front view of a worm wheel turntable;

[0031] Figure 4 It is Figure 3 the sectional view taken along B - B in

[0032] Figure 5 It is Figure 3 the sectional view taken along C - C in

[0033] In the figure: 1. Machine base; 2. Turntable; 3. Worm wheel; 4. Worm; 5. Fixed seat; 6. Plain bearing; 7. Motor; 8. Locking seat; 9. Clamping hoop; 10. Spring; 11. Movable oil passage; 12. Thrust head; 13. Injection oil passage; 14. Connecting oil passage. Specific embodiments

[0034] 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 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.

[0035] Please refer to Figures 1-5, the present utility model provides a technical solution for a worm wheel turntable: a worm wheel turntable, including a machine base 1, a turntable 2, a worm wheel 3, a worm 4, a fixed seat 5, a plain bearing 6, a motor 7, a locking seat 8, a clamping hoop 9, a spring 10, a movable oil passage 11, a top head 12, an injection oil passage 13 and a communicating oil passage 14. Specifically, the motor 7 drives the worm 4 to rotate. The worm wheel 3 and the worm 4 are in meshing connection. Thus, the worm 4 drives the worm wheel 3 to rotate, causing the turntable 2 and the locking seat 8 to rotate. During the long-term transmission process between the worm wheel 3 and the worm 4, wear occurs between the worm wheel 3 and the worm 4, resulting in an increase in the mating clearance. Since the worm 4 and the fixed seat 5 are rotationally connected through the plain bearing 6, the pitch of the middle section of the worm 4 is slightly larger than the pitch dimensions at both ends. Therefore, the thickness dimension of the plain bearing 6 is replaced to adjust the meshing area between the worm 4 and the worm wheel 3, enabling the smaller pitch area of the worm 4 to be meshed with the worm wheel 3, increasing the meshing stability and avoiding noise and vibration. The spring 10 is installed at the open end of the clamping hoop 9. Thus, the clamping hoop 9 is elastically pushed by the spring 10 to be located outside the locking seat 8. Also, the two movable oil passages 11, the injection oil passage 13 and the communicating oil passage 14 form a hydraulic oil passage. When oil is filled into the injection oil passage 13, the oil pushes the two top heads 12 to squeeze the open end of the clamping hoop 9, causing the clamping hoop 9 to lock the locking seat 8. When the filling of the injection oil passage 13 stops, the open end of the clamping hoop 9 is elastically pushed by the spring 10 to move outward, causing the clamping hoop 9 to be located outside the locking seat 8, thus releasing the fixation of the locking seat 8.

[0036] In actual use of this worm wheel turntable, when starting the motor 7 to drive the worm 4 to rotate, and then the worm 4 drives the worm wheel 3 to rotate, causing the turntable 2 and the locking seat 8 to rotate. When it is necessary to limit the angle of the turntable 2, oil is filled into the injection oil passage 13. The oil pushes the two top heads 12 to squeeze the open end of the clamping hoop 9, causing the clamping hoop 9 to lock the locking seat 8. When releasing the angle limit of the turntable 2, when the filling of the injection oil passage 13 stops, the open end of the clamping hoop 9 is elastically pushed by the spring 10 to move outward, causing the clamping hoop 9 to be located outside the locking seat 8, thus releasing the fixation of the locking seat 8.

[0037] And after wear occurs between the worm wheel 3 and the worm 4, the thickness of the plain bearing 6 is selected and replaced to enable the smaller pitch area of the worm 4 to be meshed with the worm wheel 3, increasing the meshing stability.

Claims

1. A worm gear rotating table, characterized in that, Comprising: Machine base (1); Rotary table (2), the rotary table (2) is rotatably connected to the upper part of the machine base (1); Worm gear (3), the worm gear (3) is fixed to the lower part of the rotary table (2); Worm (4), the worm (4) is rotatably connected inside the machine base (1), and the worm gear (3) and the worm (4) are meshed, and the pitch of the middle section of the worm (4) is slightly larger than the pitch dimensions at both ends; Fixed seat (5), the fixed seat (5) is fixed to one side of the machine base (1); Plain bearing (6), the plain bearing (6) is fixed between the worm (4) and the fixed seat (5), and by replacing the thickness dimension of the plain bearing (6), the meshing area between the worm (4) and the worm gear (3) can be adjusted.

2. A worm wheel turntable according to claim 1, characterized in that, Also comprising: Motor (7), the motor (7) is fixed to the other side of the machine base (1), and the output end of the motor (7) is connected to one end of the worm (4) through a coupling.

3. A worm wheel turntable according to claim 1, characterized in that Also comprising: Locking seat (8), the locking seat (8) is fixed to the lower part of the rotary table (2), the locking seat (8) penetrates through the middle of the worm gear (3), and is located inside the machine base (1).

4. A worm wheel turntable according to claim 1, characterized in that, Also comprising: Clamping hoop (9), the clamping hoop (9) is installed at the bottom of the machine base (1), and is located outside the locking seat (8); Spring (10), the spring (10) is fixed to the open end of the clamping hoop (9).

5. A worm wheel rotating table according to claim 1, characterized in that, Also comprising: Movable oil passage (11), two groups of the movable oil passages (11) are opened in the lower part of the machine base (1); Piston head (12), two groups of the piston heads (12) are slidably connected inside the movable oil passage (11), and the two groups of the piston heads (12) are respectively located on both sides of the open end of the clamping hoop (9).

6. A worm wheel turntable according to claim 1, characterized in that, Also comprising: Injection oil passage (13), the injection oil passage (13) is opened on the side wall of the machine base (1), and the injection oil passage (13) and one group of the piston heads (12) are of a communicating structure; Connecting oil passage (14), the connecting oil passage (14) is opened on the side wall of the machine base (1), and the connecting oil passage (14) and the two groups of the piston heads (12) are of a communicating structure.

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