Speed reducer for positioner

Abstract

The speed reducer comprises a box body and a box cover which are arranged front and back, a transmission assembly is installed in the box body, and the transmission assembly comprises a first gear, a gear shaft, a gear ring, an output shaft, an installation bearing and a base plate; the first gear is installed on the gear shaft, the gear shaft is meshed with the gear ring, and the gear ring is installed on the output shaft. The first gear, the gear shaft and the gear ring are each of a variable-tooth-thickness structure. The gear adopts the variable tooth thickness design, the axial distance is adjusted through assembly, zero backlash transmission is finally achieved, and it is guaranteed that the speed reducer meets the precision requirement of a robot.

Description

Technical Field

[0001] The utility model relates to the technical field of reducer structures, in particular to a reducer for a positioner. Background Art

[0002] The existing robot positioner reducers are generally imported products. There are no related products in China. The reducer is installed on the base and driven by a servo motor to drive the base installed on the reducer to rotate. The robot is installed on the base. Due to the high precision requirements of the robot, the reducer is required to have good rotation accuracy to ensure the accuracy of the robot. At present, conventional reducers cannot achieve "0" backlash transmission, so it is necessary to develop a special reducer with good rotation accuracy. Utility Model Content

[0003] The technical problem to be solved by the utility model is: to provide a speed reducer for a positioner in order to overcome the deficiencies in the prior art.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a reducer for a positioner, comprising a box body and a box cover arranged at the front and rear, a transmission assembly is installed in the box body, and the transmission assembly comprises a first gear, a gear shaft, a gear ring, an output shaft, a mounting bearing and a pad;

[0005] The first gear is mounted on the gear shaft, the gear shaft is meshed with the gear ring, and the gear ring is mounted on the output shaft;

[0006] The first gear, gear shaft and gear ring all adopt a variable tooth thickness structure.

[0007] By adopting the above technical solution, a variable tooth thickness design is adopted for the gear, and the axial distance is adjusted through assembly, ultimately achieving "0" side clearance transmission, ensuring that the reducer meets the accuracy requirements of the robot; during the operation of the reducer, if the required side clearance becomes larger due to increased temperature, the gear shaft is adjusted through assembly to reserve the required axial displacement distance, thereby ensuring the required side clearance.

[0008] Furthermore, the front end of the output shaft of the utility model is connected to the matching hole of the box body through a mounting bearing, and the rear end of the output shaft is connected to the matching hole of the box cover through a mounting bearing and a pad.

[0009] Furthermore, the output shaft described in the utility model is a hollow shaft structure.

[0010] Furthermore, the first gear described in the utility model is meshingly connected with a transmission gear on an external servo motor.

[0011] The beneficial effects of the utility model are as follows: the special reducer for the positioner of the utility model overcomes the shortcomings of traditional technology and has the following advantages: 1. It adopts servo motor control to achieve control accuracy; 2. It utilizes the characteristics of variable tooth thickness gears to improve the rotation accuracy, and adjusts the axial distance through assembly to ultimately achieve "0" side clearance transmission; 3. It has a compact structure, small size and light weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Numbers in the figure: 1. box body, 2. box cover, 3. gear shaft, 4. gear ring, 5. output shaft, 6. mounting bearing, 7. pad, 8. first gear. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] like Figure 1 The reducer for a positioner shown in the figure comprises a housing 1 and a housing cover 2 arranged front and rear, a transmission assembly is installed in the housing 1, and the transmission assembly comprises a first gear 8, a gear shaft 3, a gear ring 4, an output shaft 5, a mounting bearing 6 and a pad 7;

[0017] The first gear 8 is mounted on the gear shaft 3 , the gear shaft 3 is meshed with the gear ring 4 , and the gear ring 4 is mounted on the output shaft 5 ; the first gear 8 , the gear shaft 3 and the gear ring 4 all adopt a variable tooth thickness structure.

[0018] The front end of the output shaft 5 is connected to the matching hole of the box body 1 through the mounting bearing 6, and the rear end of the output shaft 5 is connected to the matching hole of the box cover 2 through the mounting bearing 6 and the backing plate 7.

[0019] The output shaft 5 is a hollow shaft structure. The first gear 8 is meshedly connected with a transmission gear on an external servo motor.

[0020] Working principle:

[0021] The positioner-specific reducer is driven by a servo motor. A transmission pinion is installed on the servo motor shaft. The transmission gear is kneaded with the first gear on the reducer to transmit torque and speed data. The first gear is installed together with the gear shaft and transmits torque to the next gear ring through the gear shaft. The gear ring is connected to the hollow output shaft, and finally drives the hollow shaft to rotate and transmit torque. In order to achieve "0" side clearance gear transmission, the gear adopts a variable tooth thickness design, and the axial distance is adjusted through assembly, and finally "0" side clearance transmission is achieved to ensure that the reducer meets the accuracy requirements of the robot.

[0022] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A reducer for a positioner, Features: It comprises a box body (1) and a box cover (2) arranged front and rear, a transmission assembly is installed in the box body (1), and the transmission assembly comprises a first gear (8), a gear shaft (3), a gear ring (4), an output shaft (5), a mounting bearing (6) and a pad (7); The first gear (8) is mounted on the gear shaft (3), the gear shaft (3) is meshed with the gear ring (4), and the gear ring (4) is mounted on the output shaft (5); The first gear (8), the gear shaft (3) and the gear ring (4) all adopt a variable tooth thickness structure.

2. A reducer for a positioner according to claim 1, Features: The front end of the output shaft (5) is connected to the matching hole of the box body (1) through the mounting bearing (6), and the rear end of the output shaft (5) is connected to the matching hole of the box cover (2) through the mounting bearing (6) and the pad (7).

3. A reducer for a positioner according to claim 1, Features: The output shaft (5) is a hollow shaft structure.

4. A reducer for a positioner according to claim 1, Features: The first gear (8) is meshedly connected with a transmission gear on an external servo motor.

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