Main transmission mechanism of rotating table

Abstract

The main transmission mechanism comprises a main motor, a speed reducer, a worm and a worm wheel, the speed reducer is connected with the output end of the main motor through a connecting flange, a first belt wheel is arranged on an output shaft of the speed reducer, a second belt wheel is arranged on one side of the first belt wheel, and the first belt wheel and the second belt wheel are connected through a transmission belt for expansion transmission. A connecting shaft of the worm is connected with the second belt wheel through an expansion sleeve, and the tooth face of the peripheral face of the turbine is meshed with the spiral tooth end of the worm. Through the arrangement of the main motor, the speed reducer, the worm and the turbine for combined transmission, large reduction ratio and torque can be obtained, transmission efficiency is improved, noise and vibration can be reduced through the speed reducer and belt transmission, and transmission stability and stability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of numerically controlled rotary tables, in particular to a main transmission mechanism of a rotary table. Background Art

[0002] With the development of my country's machinery industry, the market demand for high-precision processing and compound processing of workpieces is increasing. After various horizontal machining centers, CNC milling and boring machines and compound processing machine tools are equipped with rotary tables, they can complete all or most of the processing procedures of the workpiece through one clamping, greatly improving the processing accuracy and production efficiency of the workpiece. The rotary table refers to a machine tool accessory with a rotatable table top for clamping workpieces and realizing rotation and indexing positioning. It is suitable for continuous rotary processing and multi-faceted processing of engineering machinery, mining equipment, especially box-type workpieces.

[0003] Existing rotary tables generally use motors to drive the table to rotate, and the transmission system generally includes a drive motor, a transmission gearbox, and a transmission gear ring. The transmission gear ring is fixed to the bottom of the table, and the drive motor is connected to the transmission gear ring through the transmission gearbox, transmitting the motor power to the table to drive the table to rotate. Since the load of the turntable is generally large, in order to ensure the service life, a small gear ring is generally used and assembled on the inner edge of the table. This can effectively reduce the force on the gear box and reduce wear and loss. However, with this structural design of the existing transmission mechanism, after a period of use and wear, the meshing clearance between the gears of the gear transmission will increase, resulting in a decrease in rotation accuracy, making it difficult to meet the precision requirements and having low transmission efficiency. It is not suitable for occasions with high reduction ratios and high loads. Summary of the Invention

[0004] In order to solve the above problems, the utility model provides a main transmission mechanism of a rotary table which has a large reduction ratio and torque, can effectively improve the transmission efficiency and is easy to maintain.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solution: a main transmission mechanism of a rotary worktable, including a main motor, a reducer, a worm and a turbine, the bottom surface and side of the housing of the main motor are provided with screw holes that can be connected to the worktable, the reducer is connected to the output end of the main motor through a connecting flange, the input shaft of the reducer is coaxially arranged with the output shaft of the driving machine, and the end of the reducer facing the main motor is provided with a mounting hole matching the output shaft of the main motor, the output shaft of the main motor extends into the mounting hole and is connected to the input shaft of the reducer through a coupling.

[0006] A No. 1 pulley is provided on the output shaft of the reducer, and the No. 1 pulley is connected to the output shaft of the reducer through a tightening sleeve. A No. 2 pulley is provided on one side of the No. 1 pulley. The installation position of the No. 2 pulley is on the same horizontal line as the No. 1 pulley, and the two are connected by a transmission belt for expansion transmission.

[0007] The connecting shaft of the worm is connected to the No. 2 pulley through an expansion sleeve, so that an expansion transmission is achieved between the worm and the No. 2 pulley, and the helical tooth end of the worm is located on the same side as the main motor and is arranged parallel to the output shaft of the main motor. The turbine is arranged on the side of the worm away from the main motor, and the tooth surface of the outer peripheral surface of the turbine is engaged with the helical tooth end of the worm to form a transmission.

[0008] As an optimization solution for this case, after long-term use, the spiral teeth of the worm and the tooth surfaces of the turbine will have gaps due to wear, which will cause the turbine and worm to get stuck or run poorly. In order to facilitate maintenance and quick replacement of the worm, the connecting end sleeve of the worm is provided with a connecting component, and is tightened and connected with the expansion sleeve in the second pulley through the connecting component.

[0009] Furthermore, the connecting component is formed by two hollow cylinders arranged up and down and connected as one body by casting, wherein the larger diameter is the clamping section and the smaller one is the connecting section. The top surface of the clamping section of the connecting component is an open structure, and the inner diameter of the clamping section is the same as the outer diameter of the worm connecting end, and is sleeved on the connecting end of the worm. A threaded hole is provided on its circumference and penetrates to the inner wall. A locking bolt is provided in the threaded hole to lock the worm connecting end extended into the clamping section. The outer diameter of the connecting section of the connecting component is the same as the outer diameter of the worm connecting end, and is expansion-connected to the expansion sleeve in the No. 2 pulley.

[0010] Beneficial effects: 1. The utility model can obtain a larger reduction ratio and torque by setting a combined transmission of the main motor, reducer, worm and turbine, thereby improving the transmission efficiency. The reducer and belt transmission can reduce noise and vibration, and improve the smoothness and stability of the transmission; the combined transmission has strong adaptability and can adapt to the requirements of different power, speed and operating environment. The use of combined transmission can meet more complex transmission requirements and reduce maintenance costs and frequency; and the belt transmission can play a certain overload protection role. In the case of overload, the belt transmission will slip, thereby avoiding excessive damage to the reducer and motor.

[0011] ②. By providing a connecting component between the worm and the expansion sleeve of the second pulley, the helical teeth of the worm can be quickly replaced when damaged, thereby improving maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the present utility model.

[0013] Figure 2 It is a structural schematic diagram of the utility model when in use.

[0014] Figure 3 This is a schematic structural diagram of the utility model in Example 2.

[0015] Figure 4 for Figure 3 Schematic diagram of the structure of the connecting parts.

[0016] In the figure: 1. Main motor; 2. Reducer; 3. Worm; 4. Turbine; 5. Pulley No. 1; 6. Pulley No. 2; 7. Drive belt; 8. Connecting parts; 9. Clamping section; 10. Connecting section; 11. Locking bolt. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a specific component, respectively. The accompanying drawings are highly simplified and use non-precise ratios solely for the purpose of conveniently and clearly illustrating the embodiments of the present invention. Example 1

[0019] like Figure 1-2 As shown, this embodiment discloses a main transmission mechanism of a rotary table, which is used to drive the rotary table of a CNC machine tool, and specifically includes a main motor 1, a reducer 2, a worm 3 and a turbine 4. Figure 1 and Figure 2 The bottom and side of the main motor 1 are provided with screw holes that can be connected to the workbench. Figure 1 It can be seen that the reducer 2 is connected to the output end of the main motor 1 through a connecting flange, the input shaft of the reducer 2 is coaxially arranged with the output shaft of the driving machine, and the end of the reducer 2 facing the main motor 1 is provided with a mounting hole matching the output shaft of the main motor 1. The output shaft of the main motor 1 extends into the mounting hole and is connected to the input shaft of the reducer 2 through a coupling.

[0020] See also Figure 1 A number one pulley 5 is provided on the output shaft of the reducer 2, and the number one pulley 5 is connected to the output shaft of the reducer 2 through a tightening sleeve. A number two pulley 6 is provided on one side of the number one pulley 5. The installation position of the number two pulley 6 is on the same horizontal line as the number one pulley 5, and the two are connected by a transmission belt 7 for expansion transmission.

[0021] from Figure 2 It can be seen that the connecting shaft of the worm 3 is connected to the No. 2 pulley 6 through a tightening sleeve, so that an expansion transmission is formed between the worm 3 and the No. 2 pulley 6, and the helical tooth end of the worm 3 is located on the same side as the main motor 1 and is arranged parallel to the output shaft of the main motor 1. The turbine 4 is arranged on the side of the worm 3 away from the main motor 1, and the tooth surface of the outer peripheral surface of the turbine 4 is engaged with the helical tooth end of the worm 3 to form a transmission. Example 2

[0022] like Figure 2-4 The specific implementation and structure are as shown in Example 1, except that: Figure 3 It can be seen that the connecting end of the worm 3 is sleeved with a connecting component 8 and is expansion-connected to the expansion sleeve in the second pulley 6 through the connecting component 8 .

[0023] For detailed structure, see Figure 4 The connecting component 8 is composed of two hollow cylinders arranged up and down and connected as one body by casting, among which the larger diameter is the clamping section 9, and the smaller one is the connecting section 10. The top surface of the clamping section 9 of the connecting component 8 is an open structure. The inner diameter of the clamping section 9 is the same as the outer diameter of the connecting end of the worm 3, and is sleeved on the connecting end of the worm 3. A threaded hole is opened on its circumference and penetrates the inner wall. A locking bolt 11 is provided in the threaded hole to lock the connecting end of the worm 3 inserted into the clamping section 9. The outer diameter of the connecting section 10 of the connecting component 8 is the same as the outer diameter of the connecting end of the worm 3, and is tightly connected with the expansion sleeve in the second pulley 6.

[0024] When using, see Figure 2 , install the worm 3 and the turbine 4 in the rotary worktable base, the main motor 1 in the mechanism is directly installed on the reducer 2, the No. 1 pulley 5 and the reducer 2 are tightened and transmitted through the expansion sleeve, the No. 2 pulley 6 and the worm 3 are tightened and transmitted through the expansion sleeve, the No. 1 pulley 5 and the No. 2 pulley 6 are tightened and transmitted through the belt, and the worm 3 and the turbine 4 are engaged and transmitted, thereby driving the worktable to rotate.

[0025] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A main transmission mechanism of a rotary table, comprising a main motor (1), a reducer (2), a worm (3) and a turbine (4), characterized in that: The bottom surface and side of the housing of the main motor (1) are provided with screw holes that can be connected to the workbench, the reducer (2) is connected to the output end of the main motor (1) through a connecting flange, the input shaft of the reducer (2) is coaxially arranged with the output shaft of the driving machine, and the end of the reducer (2) facing the main motor (1) is provided with a mounting hole that matches the output shaft of the main motor (1), the output shaft of the main motor (1) extends into the mounting hole and is connected to the input shaft of the reducer (2) through a coupling; A first pulley (5) is provided on the output shaft of the reducer (2), and the first pulley (5) is connected to the output shaft of the reducer (2) through an expansion sleeve. A second pulley (6) is provided on one side of the first pulley (5), and the installation position of the second pulley (6) is on the same horizontal line as the first pulley (5), and the two are connected by an expansion transmission through a transmission belt (7); The connecting shaft of the worm (3) is connected to the second pulley (6) through an expansion sleeve, so that an expansion transmission is formed between the worm (3) and the second pulley (6), and the spiral tooth end of the worm (3) is located on the same side as the main motor (1) and is arranged parallel to the output shaft of the main motor (1). The turbine (4) is arranged on the side of the worm (3) away from the main motor (1), and the tooth surface of the outer peripheral surface of the turbine (4) is meshed with the spiral tooth end of the worm (3) to form a transmission.

2. The main transmission mechanism of the rotary table according to claim 1, characterized in that: The connecting end sleeve of the worm (3) is provided with a connecting component (8) and is expansion-connected to the expansion sleeve in the second pulley (6) via the connecting component (8).

3. The main transmission mechanism of the rotary table according to claim 2, characterized in that: The connecting component (8) is formed by two hollow cylinders arranged in an upper and lower manner and connected as a whole. The larger diameter is the clamping section (9) and the smaller diameter is the connecting section (10). The top surface of the clamping section (9) of the connecting component (8) is an open structure. The inner diameter of the clamping section (9) is the same as the outer diameter of the connecting end of the worm (3) and is sleeved on the connecting end of the worm (3). A threaded hole is provided on the circumference of the clamping section (9) and passes through the inner wall. A locking bolt (11) is provided in the threaded hole to lock the connecting end of the worm (3) inserted into the clamping section (9). The outer diameter of the connecting section (10) of the connecting component (8) is the same as the outer diameter of the connecting end of the worm (3) and is tightly connected to the expansion sleeve in the second pulley (6).

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