CN209959819U

CN209959819U - Double-eccentric bearing linear motion driver

Info

Publication number: CN209959819U
Application number: CN201920500561.6U
Authority: CN
Inventors: 丁海生
Original assignee: Individual
Current assignee: Limited Co Of Dongguan City Ruishi Berg Rail Manufacturing
Priority date: 2019-04-12
Filing date: 2019-04-12
Publication date: 2020-01-17
Anticipated expiration: 2029-04-12

Abstract

The utility model belongs to the technical field of mechanical transmission, a two eccentric bearing linear motion actuators is specifically disclosed. The device comprises a driving bearing, a connecting bearing, an output bearing, a servo motor and an output force arm; a driving bearing shaft core is fixedly connected in the driving bearing, and a power output shaft of the servo motor is fixedly connected to the driving bearing shaft core; an output bearing shaft core is fixedly connected in the output bearing, and an outer ring of the output bearing is connected to an output force arm; the connecting bearing comprises a first bearing head and a second bearing head, the first bearing head is eccentrically connected to the shaft core of the driving bearing, and the second bearing head is eccentrically connected to the shaft core of the output bearing. When the servo motor operates, the conversion from rotary motion to linear motion can be realized through the coupling linkage between the driving bearing and the output bearing. Compare current various other motion conversion mode, this application has that the precision is high, stability is strong, response speed is fast and conversion efficiency is high showing the advantage.

Description

Double-eccentric bearing linear motion driver

Technical Field

The utility model belongs to the technical field of mechanical transmission, a two eccentric bearing linear motion actuators is specifically disclosed.

Background

The rotary motion is converted into linear motion, and the transmission device is a very important transmission application in the modern machine tool industry and other numerical control equipment industries. In the prior art, a rack and pinion mechanism, a link mechanism, a cam mechanism, a screw mechanism, or the like is generally used to convert rotational motion into linear motion, and among these conversion modes, the conversion mode using a ball screw module or a screw sliding table module is the most common. However, limited to the limitations of the implementation mechanism and the structure of the transmission component, in some high-end applications, such as the control fields of numerical control machine, automatic elevator, aerospace craft, etc., the existing motion conversion mode cannot meet the practical application requirements in terms of precision, stability and response speed.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a two eccentric bearing linear motion actuators for realize from rotary motion to linear motion's high accuracy, high stability and efficient conversion to solve the technical problem that exists among the prior art.

The utility model discloses a realize its technological effect and the technical scheme who adopts is:

a double eccentric bearing linear motion actuator comprising: the device comprises a driving bearing, a connecting bearing, an output bearing, a servo motor and an output force arm; a driving bearing shaft core is fixedly connected in the inner ring of the driving bearing, and a power output shaft of the servo motor is fixedly connected to the driving bearing shaft core; an output bearing shaft core is fixedly connected in an inner ring of the output bearing, and an outer ring of the output bearing is connected to an output force arm; the connecting bearing comprises a first bearing head and a second bearing head, the inner rings of the first bearing head and the second bearing head are statically connected or share one inner ring, the first bearing head is eccentrically connected to the shaft core of the driving bearing, and the second bearing head is eccentrically connected to the shaft core of the output bearing; when the servo motor runs, the first bearing head and the second bearing head can be driven to synchronously and eccentrically move by driving the bearing shaft core, and then the movement is transmitted to the output force arm through the output bearing shaft core and the outer ring of the output bearing; then the linear motion is output by the output force arm.

Preferably, in the double eccentric bearing linear motion actuator provided by the utility model, still include a fixing base, the fixing base is used for fixed mounting drive bearing and servo motor. Further preferably, the fixing seat is provided with a bearing mounting position, and the output bearing is fixedly mounted in the bearing mounting position.

Preferably, in the double-eccentric bearing linear motion actuator provided by the utility model, the actuator further comprises a moving part and a linear guide rail matched with the moving part; the moving part is connected to the output force arm and can move linearly along the linear guide rail under the drive of the output force arm. Further preferably, the linear guide is fixedly installed on the fixing seat in the above technical solution.

Preferably, in the double eccentric bearing linear motion actuator provided by the utility model, the output bearing installation position is arranged on the output force arm, and the output bearing is installed in the output bearing installation position.

Preferably, in the double eccentric bearing linear motion actuator provided by the present invention, the connecting bearing comprises a first bearing head outer ring, a first bearing head roller group, a second bearing head outer ring, a second bearing head roller group and a connecting bearing shaft core; the first bearing head outer ring, the first bearing head roller group and one end of the connecting bearing shaft core form a first bearing head which is used for establishing rotatable connection between the connecting bearing and the driving bearing; the second bearing head outer ring, the second bearing head roller set and the other end of the connecting bearing shaft core form a second bearing head for establishing rotatable connection with the output bearing. Further preferably, the first bearing head roller combination and the second bearing head roller set may be a ball set and/or a ball set.

The utility model discloses profitable technological effect:

the utility model provides a two eccentric bearing linear motion sensors, through the eccentric linkage of drive bearing and output bearing, can change the rotary motion from servo motor into linear motion via the output power arm. Because the eccentric coupling bearing structure is adopted to realize the conversion of the motion mode, compared with the prior various other motion conversion modes, the device has the remarkable advantages of high precision, strong stability, high response speed and high efficiency.

In order to make the technical scheme and the technical effect of the utility model clearer and clearer, it is right that the following combines description drawings and detailed implementation mode to carry out the detailed description to the double eccentric bearing linear motion actuator disclosed by the utility model.

Drawings

FIG. 1: an exploded perspective view of a dual eccentric bearing linear motion actuator in the preferred embodiment.

And (4) marking and explaining:

10-a driving bearing, 20-a connecting bearing, 30-an output bearing, 40-a servo motor, 50-an output force arm, 60-a moving part, 70-a linear guide rail and 80-a fixed seat;

110-drive bearing core;

210-a first bearing head, 220-a second bearing head;

310-output bearing core;

510-output bearing mounting location;

810-drive bearing mounting location.

Detailed Description

Referring to fig. 1, the double eccentric bearing linear motion actuator disclosed in the present application includes a driving bearing 10, a connecting bearing 20, an output bearing 30, a servo motor 40, an output arm 50, a moving member 60, a linear guide 70, and a fixing base 80.

Drive bearing 10, servo motor 40 and linear guide 70 fixed mounting are on fixing base 80, are provided with drive bearing installation position 810 on the fixing base 80, and drive bearing 10 installs in drive bearing installation position 810. The servo motor 40 is fastened to the fixing base 80 by a fastener such as a screw bolt. The moving member 60 and the linear guide 70 are slidably connected.

The drive bearing 10 comprises an outer ring and an inner ring, a drive bearing shaft core 110 is fixedly assembled in the inner ring of the drive bearing 10, and a power output shaft of the servo motor 40 is fixedly connected to the shaft center position of the drive bearing shaft core 110.

The output bearing 30 also includes an outer ring and an inner ring, the outer ring of the output bearing 30 is connected to the output moment arm 50, and the inner ring of the output bearing 30 is fixedly fitted with the output bearing core 310. The output arm 50 is provided with an output bearing mounting position 510, and the output bearing 30 is mounted in the output bearing mounting position 510.

The connecting bearing 20 comprises a first bearing head outer ring, a first bearing head roller group, a second bearing head outer ring, a second bearing head roller group and a connecting bearing shaft core; the first bearing head outer ring, the first bearing head roller group and one end of the connecting bearing shaft core form a first bearing head 210; the second bearing head outer ring, the second bearing head roller combination and the other end of the connecting bearing shaft core form a second bearing head 220. The first bearing head 210 and the second bearing head 220 are connected in a stationary manner, and the stationary connection means that the first bearing head 210 and the second bearing head 220 which are connected can perform synchronous eccentric motion, that is, when the first bearing head 210 performs eccentric motion, the second bearing head 220 can be driven to perform eccentric motion at the same time. The stationary connection between the first bearing head 210 and the second bearing head 220 can be realized by various technical means, for example, conventional bearings can be used as the first bearing head 210 and the second bearing head 220 of the present application, a common shaft core is arranged in inner rings of the two conventional bearings to realize the stationary connection between the two bearings, or a manner of sharing one inner ring to realize the stationary connection between the two bearings. The technical means adopted in the preferred embodiment is to adopt a common shaft core as a connecting mode, namely, a common shaft core is arranged to replace inner rings of two bearings, so that a static connecting mode with better mechanical strength is formed.

The first bearing head 210 is used to establish an eccentric rotational connection with the drive bearing 10 and the second bearing head 220 is used to establish an eccentric rotational connection with the output bearing 30. The connection mode is as follows: the first bearing head 210 is eccentrically coupled to the drive bearing spindle 110 and the second bearing head 220 is eccentrically coupled to the output bearing spindle 310.

When the servo motor rotates forwards or backwards, the first bearing head 210 and the second bearing head 220 can be driven to do synchronous eccentric motion by driving the bearing shaft core 110, and then the motion is transmitted to the output force arm 50 through the output bearing shaft core 310 and the outer ring of the output bearing 30; the output arm 50 drives the moving element 60 to move linearly in a reciprocating manner along the linear guide 70.

As can be seen from the above description, the present application can convert the rotary motion from the servo motor 40 into the linear motion via the output arm 50 by the eccentric linkage of the driving bearing 10 and the output bearing 30. Because the eccentric coupling bearing structure is adopted to realize the conversion of the motion mode, compared with the prior various other motion conversion modes, the device has the remarkable advantages of high precision, strong stability, high response speed and high conversion efficiency.

While the preferred embodiments of the present invention have been illustrated in detail in the accompanying drawings, it should be understood that the scope of the invention includes, but is not limited to, the embodiments described above; the specific structure disclosed in the drawings is only a preferred embodiment of the present invention, and those skilled in the art can also develop other embodiments on this basis, and any simple deformation or equivalent replacement without departing from the innovative concept of the present invention is covered by the present invention, which belongs to the protection scope of the present invention.

Claims

1. A double eccentric bearing linear motion actuator, comprising:

the device comprises a driving bearing (10), a connecting bearing (20), an output bearing (30), a servo motor (40) and an output force arm (50); a driving bearing shaft core (110) is fixedly connected in an inner ring of the driving bearing (10), and a power output shaft of the servo motor (40) is fixedly connected to the driving bearing shaft core (110);

an output bearing shaft core (310) is fixedly connected in an inner ring of the output bearing (30), and an outer ring of the output bearing (30) is connected to the output force arm (50);

the connecting bearing (20) comprises a first bearing head (210) and a second bearing head (220), the inner ring of the first bearing head (210) and the inner ring of the second bearing head (220) are in static connection, the first bearing head (210) is eccentrically connected to the driving bearing shaft core (110), and the second bearing head (220) is eccentrically connected to the output bearing shaft core (310);

when the servo motor (40) runs, the first bearing head (210) and the second bearing head (220) can be driven to synchronously and eccentrically move through the driving bearing shaft core (110), and then the motion is transmitted to the output force arm (50) through the output bearing shaft core (310) and the outer ring of the output bearing (30); and then the linear motion is output through the output force arm (50).

2. The double eccentric bearing linear motion actuator of claim 1, wherein: the double-eccentric bearing linear motion driver further comprises a fixed seat (80), and the fixed seat (80) is used for fixedly mounting the driving bearing (10) and the servo motor (40).

3. A double eccentric bearing linear motion actuator as claimed in claim 2, characterized in that: the double-eccentric bearing linear motion driver also comprises a moving part (60) and a linear guide rail (70); the moving part (60) is connected to the output force arm (50) and can be driven by the output force arm (50) to do linear motion along the linear guide rail (70).

4. A double eccentric bearing linear motion actuator as claimed in claim 3, characterized in that: the linear guide rail (70) is fixedly arranged on the fixed seat (80).

5. A double eccentric bearing linear motion actuator as claimed in claim 2, characterized in that: an output bearing mounting position (810) is arranged on the fixed seat (80), and the output bearing (30) is fixedly mounted in the bearing mounting position (810).

6. The double eccentric bearing linear motion actuator of claim 1, wherein: an output bearing mounting position (510) is arranged on the output force arm (50), and the output bearing (30) is mounted in the output bearing mounting position (510).

7. A double eccentric bearing linear motion actuator as claimed in any of claims 1-6, characterized in that: the connecting bearing (20) comprises a first bearing head outer ring, a first bearing head roller group, a second bearing head outer ring, a second bearing head roller group and a connecting bearing shaft core; the first bearing head outer ring, the first bearing head roller group and one end of the connecting bearing shaft core form the first bearing head (210); the second bearing head outer ring, the second bearing head roller group and the other end of the connecting bearing shaft core form the second bearing head (220).