CN211630019U

CN211630019U - Transmission structure directly driven by torque motor

Info

Publication number: CN211630019U
Application number: CN202020527449.4U
Authority: CN
Inventors: 任东; 陈锦杰; 崔德友
Original assignee: Nantong Guosheng Intelligent Technology Group Co ltd
Current assignee: Nantong Guosheng Intelligent Technology Group Co ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2020-10-02
Anticipated expiration: 2030-04-10

Abstract

The utility model discloses a transmission structure that torque motor directly driven, include: the transmission rod is fixedly arranged; the transmission seat is sleeved on the transmission rod and is in transmission fit with the transmission rod, and the transmission fit is used for converting the rotary motion of the transmission seat into linear motion along the axial direction of the transmission rod; and the rotor of the motor is sleeved outside the transmission rod and is fixedly connected with the transmission seat. In this way, the utility model discloses can avoid the vibration of transmission in-process radial production at the transfer line effectively.

Description

Transmission structure directly driven by torque motor

Technical Field

The utility model relates to a mechanical transmission field especially relates to a transmission structure that torque motor directly drives.

Background

The machine tool comprises a feeding system, and the feeding system is mainly used for driving the workbench to realize linear feeding through the ball screw pair under the driving of the servo motor, so that the processing precision of the machine tool is directly influenced by the reliability of the feeding system.

Currently, the feeding system comprises: the screw rod mechanism comprises a motor mechanism, a screw rod mechanism and a screw seat, wherein the motor mechanism is used for controlling the linear motion of the screw seat through the rotary motion of the driving screw rod mechanism, and the screw seat is used for installing a workbench. Wherein, screw mechanism includes the lead screw, and motor mechanism includes: the torque motor rotor, the torque motor stator and the motor base are sequentially sleeved at the driving end of the screw rod from inside to outside, and the torque motor rotor and the screw rod are connected through a tensioning sleeve or rigidly connected in an interference fit manner.

The straightness of lead screw can receive the influence of processing technology and lead screw atress, leads to the lead screw to rotate the in-process and can drive the screw seat and can beat in radial reciprocating to lead to the workstation vibration.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves provides a torque motor directly drives transmission structure, can avoid vibration among the transmission process.

In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a transmission structure that torque motor directly drives is provided, includes:

the transmission rod is fixedly arranged;

the transmission seat is sleeved on the transmission rod and is in transmission fit with the transmission rod, and the transmission fit is used for converting the rotary motion of the transmission seat into linear motion along the axial direction of the transmission rod; and

and the rotor of the motor is sleeved outside the transmission rod and is fixedly connected with the transmission seat.

The utility model has the advantages that: be different from prior art's condition, the utility model discloses well transfer line is fixed, and the rotor of motor passes through the transmission seat and cooperates with the transfer line transmission, and the rotary motion of motor converts the linear motion along the transfer line into. The straightness of the transmission rod does not affect the stability of the motor in the moving process, and the vibration generated in the radial direction of the transmission rod in the transmission process is effectively avoided.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment of a direct drive transmission structure of a torque motor according to the present application;

FIG. 2 is a sectional view A-A of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a schematic cross-sectional view of a stator sleeve in a direct drive transmission structure of a torque motor according to the present application;

FIG. 5 is a schematic cross-sectional view of a gland in a transmission structure directly driven by a torque motor according to the present application;

FIG. 6 is a schematic cross-sectional view of a bearing sleeve in a transmission structure directly driven by a torque motor.

In the figure:

1. a base;

2. a transmission rod;

3. a transmission seat;

4. the motor comprises a motor, 9, a stator sleeve, 901, a first cavity, 902, a first mounting plane, 903, a second cavity, 10, a first bearing, 11, a stator, 1101, a first end face, 1102, a second end face, 12, a rotor, 13, a gland, 1301, a second mounting plane, 14, a second bearing, 15, a bearing sleeve, 1501, a main body part, 1502 and a limiting part;

5. a moving member;

6. guide assembly, 7 guide rails, 8 sliding blocks.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive step are within the scope of the present application.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1 and fig. 2, an embodiment of a direct-drive transmission structure of a torque motor of the present application includes: base 1, transfer line 2, transfer seat 3, motor 4 and moving part 5.

The base 1 may be a separate component which is, in use, fixedly mounted to the machine body, or may be part of the machine body.

The transmission rod 2 is in a long rod shape and is fixedly arranged on the base 1. In this embodiment, the two ends of the transmission rod 2 are fixed on the base 1, and the middle part is used for transmission. In other embodiments, the transmission rod 2 can be fixed to the base 1 by other portions as long as a sufficient length is reserved for transmission.

The transmission seat 3 is sleeved on the transmission rod 2 and is in transmission fit with the transmission rod 2, and the transmission fit is used for converting the rotary motion of the transmission seat 3 into the linear motion along the axial direction of the transmission rod 2.

The rotor of the motor 4 is sleeved outside the transmission rod 2 and is fixedly connected with the transmission seat 3, and the rotor drives the transmission seat 3 to rotate. The motor 4 is a device for converting electric energy into mechanical energy, and drives the rotor to rotate by generating a rotating magnetic field by the stator and acting on the rotor to form a rotating torque. The motor 4 of the present embodiment is slightly different from a commercially available motor. In order to facilitate the output of the rotating torque of the commercially available motor, a rotating shaft exposed out of the motor housing is arranged on the rotor and used for being connected with an object to be driven. The rotor of the motor 4 of the present embodiment is directly fixedly connected to the transmission housing 3, and therefore, a rotating shaft is not required. In addition, the rotor is directly connected with the transmission seat 3, and the rotating torque is directly transmitted to the transmission seat 3, so that a middle transmission structure is omitted, and the assembling deviation is reduced.

The moving part 5 is mounted on the motor 4 and moves along the transmission rod 2 under the driving of the motor 4. The moving part 5 may be a table of a machine tool for carrying an article to be machined.

In particular, the motor 4 may be a torque motor. The torque motor is a special motor with a large number of poles, can continuously run at a low speed of the motor even when the motor is locked (namely, a rotor cannot rotate), and cannot cause the damage of the motor. The motor can provide a stable torque to the load. The torque motor may also provide a torque (braking torque) in the opposite direction to the operation. The moment motor has small rotational inertia and can exert the maximum performance. In addition, the torque motor has large driving force and can be used under the heavy-load working condition.

In particular, the transmission rod 2 and the transmission seat 3 may constitute a ball screw pair. The ball screw pair is a screw transmission element which uses steel balls as rolling bodies between a screw and a nut, can convert rotary motion into linear motion, and is a transmission device with higher precision and more common use in transmission machinery. The ball screw pair is prior art and will not be described herein. Because the torque motor is the prior art, the torque motor can be directly purchased from the market and then assembled with the motor 4, and the manufacturing cost of the direct-drive transmission structure of the torque motor can be reduced. In addition, in other embodiments, the transmission rod 2 and the transmission seat 3 may also adopt other structural forms on the premise of meeting the transmission precision, for example, the transmission rod 2 is a screw rod, and the transmission seat 3 is connected to the transmission rod 2 in a threaded manner.

As shown in fig. 2 and fig. 3, the transmission structure directly driven by the torque motor of the present embodiment may further include: and the guide assembly 6 is connected with the motor 4 and used for guiding the motor 4 to move in the axial direction of the transmission rod 2. The provision of the guide assembly 6 enhances the stability of the motor 4 and prevents the housing portion of the motor 4 from rotating relative to the drive rod 2.

In particular, the guide assemblies 6 can be provided in two, spaced apart from the transmission rod 2 and located on both sides of the transmission rod 2, by which the motor 4 is stressed more evenly, which ensures that the motor 4 is more stable.

In particular, the guide assembly 6 may comprise: the guide rail 7 is fixedly arranged on the base 1, the extending direction of the guide rail 7 is consistent with the axial direction of the transmission rod 2, the sliding block 8 is clamped on the guide rail 7 and slides in a reciprocating mode along the extending direction of the guide rail 7, the sliding block 8 is fixedly connected with the motor 4, and the sliding block 8 can be fixed on the moving part 5.

Further, the guide rail 7 and the slider 8 constitute a linear guide rail. The linear guide rail is used in the linear reciprocating motion occasion, can bear certain torque, and can realize high-precision linear motion under the condition of high load. The linear guide is prior art and will not be described herein.

The specific configuration of the guide assembly 6 described above is merely an alternative and the application is not limited thereto and other configurations may be used in other embodiments.

As shown in fig. 1, 4 and 5, the motor 4 of the present embodiment may include: stator housing 9, first bearing 10, stator 11, rotor 12 and gland 13.

The stator sleeve 9 is in a sleeve shape, an inner wall of the stator sleeve 9 expands radially outwards to form a first cavity 901 and forms a first mounting plane 902 perpendicular to an axis of the stator sleeve 9, and an inner wall of the first cavity 901 expands radially outwards to form a second cavity 903. The first bearing 10 is sleeved in the first cavity 901, and an outer ring of the first bearing 10 abuts against the first mounting plane 902. The stator 11 is sleeved in the second cavity 903, the stator 11 has a first end surface 1101 and a second end surface 1102 in the axial direction, and the first end surface 1101 abuts against the outer ring of the first bearing 10. The rotor 12 is sleeved in the stator 11 and has a gap with the stator 11, and the rotor 12 is coaxially arranged with the first bearing 10 and detachably and fixedly connected with the inner ring of the first bearing 10. The gland 13 is fixed on the stator sleeve 9, and is provided with a second mounting plane 1301 perpendicular to the axis of the stator sleeve 9, and the second mounting plane 1301 abuts against the second end face 1102.

In the motor 4, the outer race of the first bearing 10 and the stator 11 are clamped and fixed by the first mounting plane 902 and the second mounting plane 1301.

The assembly process of the motor 4 described above includes the steps of:

placing the first bearing 10 into the first cavity 901 and making the outer ring of the first bearing 10 stick to the first mounting plane 902;

placing the stator 11 in the second cavity 903 and with the first end face 1101 abutting the outer ring of the first bearing 10;

putting the rotor 12 into the cavity of the stator 11, and fixedly connecting the inner ring of the first bearing 10 with the rotor 12;

the gland 13 is fixed to the stator housing 9, and the second mounting plane 1301 is pressed against the second end face 1102, and a force (locking force) is applied to the second end face 1102 in a direction perpendicular to the second mounting plane 1301.

As can be seen from the above-described structure and assembly steps of the motor 4, the motor 4 is compact in structure and convenient to assemble.

In the above-described structure of the motor 4, in order to better clamp the first bearing 10, the depth of the first cavity 901 in the axial direction of the stator can 9 should be smaller than the thickness of the first bearing 10.

The motor 4 is configured to limit and clamp the first bearing 10 and the stator 11 in the axial direction of the stator sleeve 9, so as to achieve the purpose of fixation. In order to fix the first bearing 10 and the stator 11 better, the first bearing 10 and the stator 11 may be limited again in the radial direction of the stator housing 9. Specifically, the first cavity 901 and the second cavity 903 are matched to the shape and size of the first bearing 10 and the stator 11, respectively.

In order to equalize the forces on the rotor 12, the electric motor 4 may further comprise: a second bearing 14. The second bearing 14 is sleeved in the second cavity 903 and is coaxially disposed with the first bearing 10, an outer ring of the second bearing 14 is clamped between the second mounting plane 902 and the second end surface 1102, and an inner ring of the second bearing 14 is detachably and fixedly connected with the rotor 12. With the addition of the second bearing 14, the structure of the motor 4 remains compact and easy to assemble.

To facilitate fixing the rotor 12, the inner ring of the first bearing 10 and/or the second bearing 14 may be detachably fixedly connected to the rotor 12 via a bearing sleeve 15. The term "and/or" means that the inner ring of the first bearing 10 is detachably and fixedly connected with the rotor 12 through the bearing sleeve 15, the inner ring of the second bearing 14 is detachably and fixedly connected with the rotor 12 through the bearing sleeve 15, and the inner rings of the first bearing 10 and the second bearing 14 are detachably and fixedly connected with the rotor 12 through the bearing sleeve 15. The first bearing 10 and the second bearing 14 correspond to two bearing sleeves 15, respectively.

As shown in fig. 1 and 6, a specific fixing structure of the inner race of the first bearing 10 and the rotor 12 will be described below by taking the first bearing 10 as an example. The second bearing 14 may be referenced to the first bearing 10.

The bearing housing 15 includes: a body portion 1501 and a stopper portion 1502. The main body portion 1501 is cylindrical, and extends outward from the edge of one end in the radial direction to form a limiting portion 1502, the main body portion 1501 is matched with the inner ring of the first bearing 10 and sleeved in the inner ring, the main body portion 1501 is detachably and fixedly connected with the rotor 12, and the inner ring of the first bearing 10 is clamped between the rotor 12 and the limiting portion 1502 and is subjected to clamping force.

The first bearing 10 and the second bearing 14 may be a single bearing or may be a coaxially disposed bearing set.

In order to conveniently disassemble and assemble the motor 4, the gland 13 can be detachably connected with the stator sleeve 9.

Specifically, the gland 13 may be threadedly coupled with the stator can 9 so that the second mounting plane 1301 on the gland 13 may better provide the locking force. Of course, the connection of the gland 13 to the stator can 9 is not limited thereto, and other detachable connections are possible.

In this embodiment, the rotor of the motor 4 is in transmission fit with the transmission rod 2 through the transmission seat 3, and after the motor 4 is powered on, the rotary motion of the rotor is converted into linear motion along the transmission rod 2. The straightness of the transmission rod 2 does not affect the stability of the motor 4 in the moving process, and the vibration in the transmission process is effectively avoided. In addition, in the embodiment, the transmission rod 2 is fixedly arranged, the rotor of the motor 4 can rotate at a high speed, and the linear movement speed of the motor 4 (the moving part 5) can be increased.

The above description is only an embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes performed by the content of the present specification and the attached drawings, or directly or indirectly applied to other related technical fields, are also included in the scope of the present invention.

Claims

1. The utility model provides a transmission structure that torque motor directly driven which characterized in that includes:

the transmission rod is fixedly arranged;

2. The torque motor direct drive transmission structure as claimed in claim 1, wherein the motor is a torque motor.

3. The torque motor direct-drive transmission structure as claimed in claim 1, wherein the transmission rod and the transmission seat form a ball screw pair.

4. The torque motor direct drive transmission structure as claimed in claim 1, further comprising: and the guide assembly is connected with the motor and used for guiding the motor to move in the axial direction of the transmission rod.

5. The torque motor direct drive transmission structure as claimed in claim 4, wherein the guide assembly comprises: the guide rail is fixedly arranged, the extending direction of the guide rail is consistent with the axial direction of the transmission rod, the sliding block is clamped on the guide rail and slides back and forth along the extending direction of the guide rail, and the sliding block is fixedly connected with the motor.

6. The torque motor direct drive transmission structure as claimed in claim 5, wherein the guide rail and the slide block form a linear guide rail.

7. The torque motor direct drive transmission structure as claimed in claim 1, wherein the motor comprises:

the stator comprises a sleeve-shaped stator sleeve, wherein a first mounting plane perpendicular to the axis of the stator sleeve is arranged on the inner wall of the stator sleeve;

the first bearing is sleeved in the stator sleeve, and the outer ring of the first bearing is abutted against the first mounting plane;

the stator is sleeved in the stator sleeve, the stator is provided with a first end face and a second end face in the axial direction, and the first end face abuts against the outer ring of the first bearing;

the rotor is sleeved in the stator and a gap is reserved between the rotor and the stator, and the rotor and the first bearing are coaxially arranged and detachably and fixedly connected with the inner ring of the first bearing; and

and the gland is fixed on the stator sleeve and is provided with a second mounting plane perpendicular to the axis of the stator sleeve, and the second mounting plane is abutted against the second end face.

8. The torque motor direct drive transmission structure as claimed in claim 7, wherein the motor further comprises:

the second bearing is sleeved in the stator sleeve and is coaxially arranged with the first bearing, an outer ring of the second bearing is clamped between the second mounting plane and the second end face, and an inner ring of the second bearing is detachably and fixedly connected with the rotor.

9. The torque motor direct drive transmission structure as claimed in claim 8, wherein the inner ring of the first bearing and/or the second bearing is detachably and fixedly connected with the rotor through a bearing sleeve.

10. The torque motor direct drive transmission structure as claimed in claim 7, wherein the gland is detachably connected with the stator sleeve.