阅读说明：本技术 一种新型小体积的力矩输出轴 (Novel small-size torque output shaft ) 是由 任梦晴 王晓卿 郭志 王飞 程扬 于 2021-08-25 设计创作，主要内容包括：本发明公开了一种新型小体积的力矩输出轴,涉及力矩输出轴技术领域,包括基座体,所述基座体的外部安装有位置传感器,所述角接触球轴承安装在基座体的内部,且角接触球轴承的内侧安装有旋转蜗轮轴,所述电机组件安装在基座体的外部右侧,且电机组件的内部上方安设有编码器,所述编码器的底部电性连接有直流电机,所述直流电机的底部安装有第一传动齿轮,且第一传动齿轮的左侧配合安装有第二传动齿轮。本发明中,设置有基座体、角接触球轴承、旋转蜗轮轴以及传动蜗轮,力矩输出轴的外壳采用基座体,将所有零部件都安装在基座体上,使得整体的集成度大大提高,并且还能够减小力矩输出轴的外形尺寸。(The invention discloses a novel small-size torque output shaft, which relates to the technical field of torque output shafts and comprises a base body, wherein a position sensor is arranged outside the base body, an angular contact ball bearing is arranged inside the base body, a rotary worm gear shaft is arranged on the inner side of the angular contact ball bearing, a motor assembly is arranged on the right side of the outside of the base body, an encoder is arranged above the inside of the motor assembly, the bottom of the encoder is electrically connected with a direct current motor, a first transmission gear is arranged at the bottom of the direct current motor, and a second transmission gear is arranged on the left side of the first transmission gear in a matched mode. According to the invention, the base body, the angular contact ball bearing, the rotary worm gear shaft and the transmission worm gear are arranged, the base body is adopted by the shell of the torque output shaft, and all parts are arranged on the base body, so that the integral integration degree is greatly improved, and the overall dimension of the torque output shaft can be reduced.)

1. A novel small-size torque output shaft is characterized by comprising:

a base body (1), wherein a position sensor (9) is mounted outside the base body (1);

the angular contact ball bearing (5), the said angular contact ball bearing (5) is installed in the inside of the base body (1), and the inboard of the angular contact ball bearing (5) is fitted with the rotating worm gear shaft (7);

novel small-size torque output shaft still includes motor element (4), motor element (4) are installed in the outside right side of base body (1), and motor element (4) inside top has installed encoder (11), the bottom electric connection of encoder (11) has direct current motor (12), first drive gear (3) is installed to the bottom of direct current motor (12), and the left side cooperation of first drive gear (3) installs second drive gear (2), the back of second drive gear (2) is connected with transmission worm wheel (8).

2. A novel low-volume torque output shaft according to claim 1, wherein: and a position feedback (10) is arranged outside the rotating worm wheel shaft (7), and a screw (6) is connected between the position feedback (10) and the rotating worm wheel shaft (7).

3. A novel low-volume torque output shaft according to claim 1, wherein: a rotating structure is formed between the rotating worm wheel shaft (7) and the base body (1) through the angular contact ball bearing (5), and the outer wall of the rotating worm wheel shaft (7) is tightly attached to the inner wall of the angular contact ball bearing (5).

4. A novel low-volume torque output shaft according to claim 1, wherein: the angular contact ball bearing (5) is matched with the rotary worm wheel shaft (7) in a small interference mode, and pretightening force is applied during installation.

5. A novel low-volume torque output shaft according to claim 1, wherein: the first transmission gear (3) and the second transmission gear (2) are matched to form a gear pair, and the first transmission gear (3) and the second transmission gear (2) adopt an anti-backlash structure.

6. A novel low-volume torque output shaft according to claim 1, wherein: the transmission worm wheel (8) is matched with the rotary worm wheel shaft (7) to form a worm wheel and worm pair, the rotary worm wheel shaft (7) is made into two pieces, and the middle of the two pieces is connected through a spring.

7. A novel low-volume torque output shaft according to claim 1, wherein: the direct current motor (12) is a direct current coreless motor, the size is small, the conversion efficiency is high, and the specification of the encoder (11) is a high-precision absolute type.

8. A novel low-volume torque output shaft according to claim 1, wherein: the position sensor (9) is a correlation photoelectric switch, and the angular repeatability is not more than 2'.

Technical Field

The invention relates to the technical field of torque output shafts, in particular to a novel small-size torque output shaft.

Background

For rotary calibration products such as a rotary table and a transposition mechanism which need to work in a rotating mode, a torque motor and a rotary shaft system are combined to be used as a torque output shaft, indexes such as an accurate angular position and an angular speed are obtained, the form that a rotary shaft is directly driven by the motor can ensure the closed loop of the rotating angle, the rotating speed and the rotating acceleration, and the torque output shaft has strong functionality, but the form has the problems of large power consumption, small output torque, large size and the like, and therefore a novel torque output shaft with small size is provided.

The existing torque output shaft generally needs to be connected with various components to realize different functional effects, the integration level is low, the integral volume of the torque output shaft becomes larger and larger, and the use is troublesome.

Disclosure of Invention

The invention aims to solve the defects that the conventional torque output shaft is generally required to be connected with various components to realize different functional effects, the integration level is low, the integral volume of the torque output shaft becomes larger and larger, and the use is troublesome.

In order to achieve the purpose, the invention adopts the following technical scheme:

a novel low-volume torque output shaft, comprising:

the device comprises a base body, a positioning sensor and a positioning sensor, wherein the position sensor is arranged outside the base body;

the angular contact ball bearing is installed in the base body, and a rotating worm wheel shaft is installed on the inner side of the angular contact ball bearing;

novel small-size torque output shaft still includes motor element, motor element installs on the outside right side of the base body, and motor element's inside top has installed the encoder, the bottom electric connection of encoder has direct current motor, first drive gear is installed to direct current motor's bottom, and the left side cooperation of first drive gear installs second drive gear, second drive gear's back is connected with the transmission worm wheel.

Preferably, a position feedback is installed outside the rotating worm wheel shaft, and a screw is connected between the position feedback and the rotating worm wheel shaft.

Preferably, a rotating structure is formed between the rotating worm gear shaft and the base body through an angular contact ball bearing, and the outer wall of the rotating worm gear shaft is tightly attached to the inner wall of the angular contact ball bearing.

Preferably, the angular contact ball bearing and the rotary worm wheel shaft are in small interference fit, and pre-tightening force is applied during installation.

Preferably, the first transmission gear and the second transmission gear are matched to form a gear pair, and the first transmission gear and the second transmission gear adopt an anti-backlash structure.

Preferably, the transmission worm wheel is matched with the rotary worm wheel shaft to form a worm wheel and worm pair, the rotary worm wheel shaft is made into two pieces, and the middle of the two pieces is connected through a spring.

Preferably, the direct current motor is a direct current coreless motor, the size is small, the conversion efficiency is high, and the specification of the encoder is a high-precision absolute type.

Preferably, the position sensor is a correlation photoelectric switch, and the angular repeatability is not more than 2 ″.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. according to the invention, the base body, the angular contact ball bearing, the rotary worm gear shaft and the transmission worm gear are arranged, the base body is adopted by the shell of the torque output shaft, and all parts are arranged on the base body, so that the integral integration degree is greatly improved, and the overall dimension of the torque output shaft can be reduced.

2. According to the invention, the direct current motor, the first transmission gear, the second transmission gear and the transmission worm gear are arranged, and the output torque of the direct current motor forms two-stage transmission through the first transmission gear and the second transmission gear, so that the torque can be amplified, and the effect can be reduced when large torque is obtained.

3. The invention is provided with the encoder, the direct current motor and the rotating worm wheel shaft, the rotating worm wheel shaft is made into two pieces, the two pieces of worm wheels are connected through the spring to form the anti-backlash structure, and the anti-backlash structure and the encoder are added to provide high-precision angle position and angular speed for the output shaft.

Drawings

FIG. 1 is a schematic view of the overall front structure of the present invention;

FIG. 2 is a schematic view of the overall internal structure of the present invention;

FIG. 3 is a schematic view of the overall rear structure of the present invention;

fig. 4 is a schematic view of the internal structure of the motor assembly according to the present invention.

Illustration of the drawings:

1. a base body; 2. a second transmission gear; 3. a first drive gear; 4. a motor assembly; 5. angular contact ball bearings; 6. a screw; 7. a rotating worm-gear shaft; 8. a drive worm gear; 9. a position sensor; 10. position feedback; 11. an encoder; 12. a direct current motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a novel small-volume torque output shaft comprises a base body 1, a second transmission gear 2, a first transmission gear 3, a motor assembly 4, an angular contact ball bearing 5, a screw 6, a rotary worm gear shaft 7, a transmission worm gear 8, a position sensor 9, a position feedback 10, an encoder 11 and a direct current motor 12, wherein the position sensor 9 is installed outside the base body 1, the position sensor 9 is a correlation photoelectric switch, the angular contact ball bearing 5 is not more than 2', the angular contact ball bearing 5 is installed inside the base body 1, the rotary worm gear shaft 7 is installed inside the angular contact ball bearing 5, the angular contact ball bearing 5 and the rotary worm gear shaft 7 are in small interference fit, pretightening force is applied during installation, the interference fit ensures the stability of connection between the rotary worm gear shaft 7 and the angular contact ball bearing 5, and the rotary structure is formed between the rotary worm gear shaft 7 and the base body 1 through the angular contact ball bearing 5, the outer wall of the rotary worm wheel shaft 7 is tightly attached to the inner wall of the angular contact ball bearing 5, the rotary structure ensures that the rotary worm wheel shaft 7 can rotate around the angular contact ball bearing 5, the tight attachment ensures that the rotary worm wheel shaft 7 does not slip in the rotating process, the motor assembly 4 is arranged on the right side of the outer portion of the base body 1, the encoder 11 is arranged above the inner portion of the motor assembly 4, the bottom of the encoder 11 is electrically connected with the direct current motor 12, the direct current motor 12 is a direct current hollow cup motor, the size is small, the conversion efficiency is high, the specification of the encoder 11 is high-precision absolute type, the bottom of the direct current motor 12 is provided with the first transmission gear 3, the left side of the first transmission gear 3 is provided with the second transmission gear 2 in a matched mode, the first transmission gear 3 is matched with the second transmission gear 2 to form a gear pair, and the first transmission gear 3 and the second transmission gear 2 adopt a gap eliminating structure, the first transmission gear 3 can drive the second transmission gear 2 to rotate by being meshed with the second transmission gear 2 in the rotating process, the backlash eliminating structure can effectively increase the backlash value between tooth surfaces, the first transmission gear 3 and the second transmission gear 2 are ensured not to be locked due to thermal expansion in the rotating process, meanwhile, a certain space can be reserved for lubrication, the back of the second transmission gear 2 is connected with a transmission worm gear 8, the transmission worm gear 8 is matched with a rotating worm gear shaft 7 to form a worm gear pair, the rotating worm gear shaft 7 is made into two pieces, and the middle is connected through a spring, the transmission worm wheel 8 can drive the rotating worm wheel shaft 7 to rotate through meshing in the rotating process, the position feedback 10 is arranged outside the rotating worm wheel shaft 7, and a screw 6 is connected between the position feedback 10 and the rotary worm wheel shaft 7, and the position feedback 10 can be fixed on the rotary worm wheel shaft 7 through the screw 6.

The working principle is as follows: when a product needs an accurate angle position, a starting voltage is loaded on the motor component 4 to drive the direct current motor 12 to rotate, the first transmission gear 3 is driven to rotate, a gear pair formed by matching the first transmission gear 3 and the second transmission gear 2 and a worm gear pair formed by matching the transmission worm gear 8 and the rotating worm gear shaft 7 drive the rotating worm gear shaft 7 to rotate, the rotating worm gear shaft 7 is connected with the product to drive the product to rotate, when the position feedback 10 triggers the position sensor 9, the product rotates to a zero-degree position, then the motor component 4 continues to rotate the direct current motor 12, meanwhile, the encoder 11 of the motor component 4 starts to measure and count from the zero-degree position, the rotation angle of the product driven by the rotating worm gear shaft 7 is subjected to closed-loop control by controlling the count of the encoder 11, when the count of the encoder 11 reaches a set angle value, the direct current motor 12 inside the motor component 4 stops rotating, the rotary worm wheel shaft 7 drives the product to rotate to a designated angle position, because the encoder 11 adopts a high digit number, the motor assembly 4 drives the rotary worm wheel shaft 7 to decelerate through two-stage backlash eliminating transmission, so the encoder 11 in a unit angle can be subdivided into an angle second level, the rotary worm wheel shaft 7 can obtain high angle repeatability and angle precision by controlling the encoder 11 of the motor assembly 4, when the product needs accurate and stable speed precision, the motor assembly 4 loads starting voltage to drive the first transmission gear 3 to rotate, a gear pair formed by matching the first transmission gear 3 and the second transmission gear 2 and a worm gear pair formed by matching the transmission worm wheel 8 and the rotary worm wheel shaft 7 drive the rotary worm wheel shaft 7 to rotate, the rotary worm wheel shaft 7 is connected with the product to drive the product to rotate, and the angle of the rotary worm wheel shaft 7 driving the product to rotate is subjected to closed-loop control by controlling the counting of the encoder 11, when the counting of the encoder 11 reaches a set angle value in unit time, the rotating worm wheel shaft 7 drives the product to rotate at a specified angle speed, and because the encoder 11 adopts a high-digit number, the motor assembly 4 is driven to the rotating worm wheel shaft 7 to decelerate through two-stage anti-backlash transmission, the encoder 11 in the unit angle can be subdivided into an angle second stage, and the rotating worm wheel shaft 7 can obtain high angle speed precision by controlling the encoder 11 of the motor assembly 4.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.