CN210637396U - Motor-driven screw mechanism - Google Patents

Motor-driven screw mechanism Download PDF

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Publication number
CN210637396U
CN210637396U CN201920408885.7U CN201920408885U CN210637396U CN 210637396 U CN210637396 U CN 210637396U CN 201920408885 U CN201920408885 U CN 201920408885U CN 210637396 U CN210637396 U CN 210637396U
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CN
China
Prior art keywords
motor
sleeve
cover
screw
expansion sleeve
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Active
Application number
CN201920408885.7U
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Chinese (zh)
Inventor
施琴慧
潘理平
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Nanjing Institute of Mechatronic Technology
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Nanjing Institute of Mechatronic Technology
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Priority to CN201920408885.7U priority Critical patent/CN210637396U/en
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Publication of CN210637396U publication Critical patent/CN210637396U/en
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Abstract

A motor-driven screw rod mechanism comprises a coupling sleeve, a left end cover arranged on the left side of the coupling sleeve, a right end cover arranged on the right side of the coupling sleeve, a screw rod shaft expansion sleeve and a motor shaft expansion sleeve, wherein a step inner hole is formed in the coupling sleeve, and the screw rod shaft expansion sleeve and the motor shaft expansion sleeve are respectively arranged in the step inner hole. As a mechanical structure device in mechanical equipment, the design and manufacturing cost is reduced, and the motor-driven screw mechanism has the advantages of simple structure, convenient assembly, disassembly and adjustment, reliable use, certain universality, economic practicability and novelty, and particularly relates to the field of machinery requiring torque transmission.

Description

Motor-driven screw mechanism
Technical Field
The utility model relates to a technical field among the mechanical structure specifically is applied to mechanical equipment in a mechanical device with motor drive lead screw driven mechanical device.
Background
In many mechanical structures of mechanical equipment, power and torque are transmitted through a rotating shaft, and it is common that the power and the torque are transmitted to a screw rod through a motor on a machine tool. The torque equivalent transmission is widely required in the mechanical field, and the direct transmission can ensure the torque equivalent transmission and save space. A motor-driven screw mechanism realizes equivalent transmission of torque. Traditional motor drive screw mechanism, the structure is complicated, and the tight mode that expands that motor shaft and screw shaft adopted is interference not have the key connection or have the key connection moreover, and these two kinds of tight modes that expand have certain defect, for example: the assembly of the interference keyless connection is difficult, the key groove needs to be configured for the keyed connection, and the key groove processing procedure is complex, so that the cost is increased. And if the expansion sleeve is adopted for expansion, the shaft and the hole do not need the requirement of high-precision manufacturing tolerance like interference fit. Therefore, a motor-driven screw mechanism which is simple in structure, stable and reliable in performance, economical and practical and adopts the expansion sleeve mode for expansion is needed.
SUMMERY OF THE UTILITY MODEL
The purpose of the invention is as follows: the utility model discloses an overcome not enough that exists among the prior art, carry out reasonable improvement back to some problems that traditional motor drive screw mechanism exists, provide a practical reliable motor drive screw mechanism.
The technical scheme is as follows: in order to solve the technical problem, the utility model adopts the following technical scheme:
a motor-driven screw rod mechanism comprises a coupling sleeve 3, a left end cover 1 arranged on the left side of the coupling sleeve 3, a right end cover 5 arranged on the right side of the coupling sleeve 3, a screw rod shaft expansion sleeve 2 and a motor shaft expansion sleeve 4, wherein a step inner hole is formed in the coupling sleeve 3, and the screw rod shaft expansion sleeve 2 and the motor shaft expansion sleeve 4 are respectively arranged in the step inner hole.
Further, the diameter of the step hole at the position of the step hole where the screw shaft expansion sleeve 2 is installed is smaller than the diameter of the step hole at the position of the step hole where the motor shaft expansion sleeve 4 is installed.
Further, the screw shaft expansion sleeve 2 is installed between the screw shaft and a step inner hole of the coupling sleeve, and the motor shaft expansion sleeve 4 is installed between the motor shaft and the step inner hole of the coupling sleeve; the small end face of the left end cover 1 is attached to the left end face of the screw shaft expansion sleeve 2, and the small end face of the right end cover 5 is attached to the right end face of the motor shaft expansion sleeve 4.
Furthermore, a step inner hole is arranged in the coupling sleeve 3 and is a straight hole.
Further, the outer periphery of the motor shaft is fittingly mounted inside the motor shaft expansion sleeve 4, and the outer periphery of the screw shaft is fittingly mounted inside the screw shaft expansion sleeve 2.
Furthermore, 4 through threaded holes are uniformly distributed in the circumferential direction of the coupling sleeve 3, and the coupling sleeve corresponds to 4 through holes respectively arranged in the circumferential direction of the left end cover 1 and the right end cover 1.
Further, the lock bolt 6 is passed through the screw hole and the through hole and tightened.
Furthermore, gaps of about 1-2mm are required to be reserved between the end surfaces of the left end cover 1, the right end cover 5 and the coupling sleeve 3 after the screw shaft and the motor shaft are in a tight expansion state.
The utility model discloses following beneficial effect has:
as a mechanical structure device in mechanical equipment, the design and manufacturing cost is reduced, and the motor-driven screw mechanism has the advantages of simple structure, convenient assembly, disassembly and adjustment, reliable use, certain universality, economic practicability and novelty, and particularly relates to the field of machinery requiring torque transmission.
Drawings
Fig. 1 is a schematic structural diagram of the motor-driven screw mechanism of the present invention.
Wherein the reference numerals are: the screw rod comprises a left end cover 1, a screw rod shaft expansion sleeve 2, a connecting sleeve 3, a motor shaft expansion sleeve 4, a right end cover 5 and a plurality of locking bolts 6.
Detailed Description
The present invention will be further described with reference to fig. 1.
As shown in fig. 1, the utility model discloses an install the tight cover of lead screw axle expansion 2 and the tight cover of motor shaft expansion 4, left end lid 1, right-hand member lid 5 and a plurality of locking bolt 6 in connection cover 3, wherein, connection cover 3 in set up the step hole and install the tight cover of lead screw axle expansion 2 and the tight cover of motor shaft expansion 4 respectively, connection cover 3 in set up the step hole and be convenient for process for the straight hole rather than the taper hole, the internal diameter of straight hole respectively with two teams expand the external diameter of tight cover unanimously and have certain tolerance fit requirement. The connecting sleeve 3 is uniformly distributed with 4 threaded holes in the circumferential direction, is through from front to back, and corresponds to the 4 through holes in the circumferential direction of the left end cover 1 and the right end cover 5. The two pairs of expansion sleeves 2 and 4 are respectively arranged between the screw rod shaft, the motor shaft and the inner hole of the connecting sleeve 3, and the small end surfaces of the left end cover and the right end cover are respectively attached to the left end surface and the right end surface of the two pairs of expansion sleeves. The expansion sleeve is installed without heating, cooling or using a pressurizing device, the locking bolt is screwed according to a specified torque value when the expansion sleeve is installed, the locking bolt 6 enables the expansion sleeves 2 and 4 to move axially through the small end faces of the left end cover 1 and the right end cover 5 and to be contained between shafts or sleeves to generate positive pressure and generate friction force along with the positive pressure, and the load transmission is realized to ensure that the motor can reliably drive the screw rod.
Gaps of about 1-2mm need to be reserved between the end surfaces of the left end cover 1, the right end cover 5 and the coupling sleeve 3 after the two shafts are in a tight expansion state to ensure the reliable tight expansion of the motor shaft and the screw shaft (if the end surfaces of the left end cover and the right end cover are firstly attached to the end surface of the coupling sleeve, the end surfaces cannot move axially and cannot generate radial positive pressure through the conical surface of the tight expansion sleeve).
In order to optimize the technical scheme, the specific measures adopted further comprise:
the mechanism realizes the function of converting axial linear movement into radial reliable expansion through the conical surface of the expansion sleeve.
The inner holes of the two pairs of expansion sleeves 2 and 4 are respectively consistent with the outer diameters of the motor shaft and the screw shaft, and the outer diameters of the expansion sleeves 2 and 4 are consistent with the step inner hole of the connecting sleeve 3. The expansion sleeve can bear load, and can be used in combination of a plurality of series connections in order to meet different installation load requirements.
When the expansion sleeve is axially installed, the required axial position size and the relative position of the expansion sleeve and a part can be conveniently adjusted without any axial fixation.
The expansion sleeve is produced in batches by professional matching manufacturers, is cheap and high-quality, and can be purchased domestically and internationally according to quality requirements.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims (8)

1. The motor-driven screw rod mechanism comprises a coupling sleeve (3), a left end cover (1) arranged on the left side of the coupling sleeve (3) and a right end cover (5) arranged on the right side of the coupling sleeve (3), and is characterized by further comprising a screw rod shaft expansion sleeve (2) and a motor shaft expansion sleeve (4), wherein a step inner hole is formed in the coupling sleeve (3), and the screw rod shaft expansion sleeve (2) and the motor shaft expansion sleeve (4) are respectively arranged in the step inner hole.
2. The motor-driven screw mechanism according to claim 1, wherein the diameter of the stepped hole at the position of the stepped hole where the screw shaft expansion sleeve (2) is mounted is smaller than the diameter of the stepped hole at the position of the stepped hole where the motor shaft expansion sleeve (4) is mounted.
3. The motor-driven screw mechanism according to claim 1, wherein the screw shaft expansion sleeve (2) is mounted between the screw shaft and the stepped inner hole of the coupling sleeve, and the motor shaft expansion sleeve (4) is mounted between the motor shaft and the stepped hole of the coupling sleeve; the small end face of the left end cover (1) is attached to the left end face of the screw shaft expansion sleeve (2), and the small end face of the right end cover (5) is attached to the right end face of the motor shaft expansion sleeve (4).
4. A motor-driven screw mechanism according to claim 1, characterized in that the stepped inner bore in the coupling sleeve (3) is a straight bore.
5. A motor-driven screw mechanism according to claim 3, characterized in that the outer circumference of the motor shaft is snugly mounted inside the motor shaft expansion sleeve (4) and the outer circumference of the screw shaft is snugly mounted inside the screw shaft expansion sleeve (2).
6. The motor-driven screw mechanism according to claim 1, wherein the coupling sleeve (3) has 4 threaded holes distributed uniformly in the circumferential direction, and the 4 threaded holes correspond to the 4 through holes arranged in the circumferential direction of the left end cover (1) and the right end cover (5).
7. The motor-driven screw mechanism according to claim 6, further comprising a locking bolt (6), wherein the locking bolt (6) is passed through the threaded hole and the through hole and tightened.
8. The motor-driven screw mechanism according to claim 5, wherein a clearance of about 1-2mm is reserved between the end surfaces of the left end cover (1), the right end cover (5) and the coupling sleeve (3) after the screw shaft and the motor shaft are in a tight expansion state.
CN201920408885.7U 2019-03-28 2019-03-28 Motor-driven screw mechanism Active CN210637396U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920408885.7U CN210637396U (en) 2019-03-28 2019-03-28 Motor-driven screw mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920408885.7U CN210637396U (en) 2019-03-28 2019-03-28 Motor-driven screw mechanism

Publications (1)

Publication Number Publication Date
CN210637396U true CN210637396U (en) 2020-05-29

Family

ID=70792266

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920408885.7U Active CN210637396U (en) 2019-03-28 2019-03-28 Motor-driven screw mechanism

Country Status (1)

Country Link
CN (1) CN210637396U (en)

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