CN211239593U

CN211239593U - Direct current motor reducing gear box anti-sticking is constructed

Info

Publication number: CN211239593U
Application number: CN201922410068.8U
Authority: CN
Inventors: 邓水平
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-28
Filing date: 2019-12-28
Publication date: 2020-08-11
Anticipated expiration: 2029-12-28

Abstract

The utility model discloses an anti-jamming structure of a direct current motor reduction box, which comprises a motor, a worm, a motor output shaft, a motor oil-containing bearing, a reduction box shell, a reduction box inner U-shaped support, a gear set, an output shaft, a motor rotor and a main shaft gear; the worm is sleeved on the motor output shaft in an interference fit mode, and the motor output shaft penetrates through the worm and protrudes out of the head. The motor shell is fixed on the reduction gearbox shell by screws, and the output shaft of the motor penetrates through the worm and the head part is provided with a U-shaped support inside the reduction gearbox. When the direct current motor is locked, the worm on the output shaft of the motor is axially blocked by the U-shaped support in the shell of the reduction gearbox without moving, so that the axial sticking of a rotor in the motor and the end face of an oil-containing bearing is prevented; when the motor rotates reversely, the starting torque is small, and the starting is easy, so that the reduction gearbox is prevented from being blocked.

Description

Direct current motor reducing gear box anti-sticking is constructed

Technical Field

The utility model relates to a domestic kitchen appliance field, concretely relates to direct current motor reducing gear box anti-sticking is dead structure.

Background

The exhaust inlet of the range hood in the household kitchen appliance is provided with a turning plate, and a direct current motor reduction box is used for providing power. When the motor is opened or closed, the stopping or stopping is realized by adopting the locked-rotor current change of a direct current motor reduction box and the electric control matching.

After the turning plate is opened in place, the motor is locked, the motor with large locked torque is easy to block, and when the turning plate is closed, the motor cannot be started reversely, so that accidental faults of the turning plate cannot be closed are caused.

After the turning plate is closed in place, the motor is locked, the inside of the motor with large locked torque is easy to block, and when the turning plate is opened, the motor cannot be started reversely, so that accidental faults of the turning plate cannot be caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome foretell not enough, provide a direct current motor reducing gear box anti-sticking dead structure.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

the device comprises a motor, a worm, a motor output shaft, a motor oil-containing bearing, a reduction gearbox shell, a U-shaped support in the reduction gearbox, a gear set and an output shaft; the worm is sleeved on the motor output shaft in an interference fit mode, and the motor output shaft penetrates through the worm and protrudes out of the head. The motor shell is fixed on the reduction gearbox shell by screws, and the output shaft of the motor penetrates through the worm and the head part is provided with a U-shaped support inside the reduction gearbox. When the direct current motor is locked, the worm on the output shaft of the motor is axially blocked by the U-shaped support in the shell of the reduction gearbox without moving, so that the axial sticking of a rotor in the motor and the end face of an oil-containing bearing is prevented; when the motor rotates reversely, the starting torque is small, and the starting is easy, so that the reduction gearbox is prevented from being blocked.

Preferably, the worm is sleeved on the output shaft of the motor in an interference fit mode, the output shaft penetrates through the worm and protrudes out of the head, and the protruding part is provided with a U-shaped support on the shell of the reduction gearbox.

Preferably, a U-shaped supporting motor output shaft is arranged in the shell of the reduction gearbox, penetrates through the head outlet part of the worm, and is clamped on the U-shaped support to freely rotate without axially moving.

Preferably, the diameter of the worm is larger than the U-shaped supporting section in the shell of the reduction gearbox, the worm is axially blocked, and the worm and the motor output shaft are prevented from axially moving. The end face of the inner rotor on the output shaft is prevented from being stuck to the end face of the oil-retaining bearing in the axial direction.

The utility model has the advantages that: when the direct current motor reduction box is locked, the worm wheel has an axial force to act on the worm and the motor output shaft, and the U-shaped support blocks the axial movement of the worm and the motor output shaft because the diameter of the worm is larger than that of the U-shaped support, so that the motor rotor is prevented from contacting with the end face of the oil-retaining bearing.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is an internal three-dimensional view of the present invention;

fig. 3 is a three-dimensional view of the present invention;

in the figure: 1. the motor, 2, a reduction gearbox shell, 3, a main shaft bearing, 4, a main shaft, 5, a main shaft gear, 6, a rotor, 7, an oil-retaining bearing, 8, a motor output shaft, 9, a worm, 10, a U-shaped support and 11, a gear set.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

Example 1:

as shown in fig. 1, 2 and 3, an anti-jamming structure of a reduction gearbox of a direct current motor comprises a motor 1, a worm 9, a motor output shaft 8, a motor oil-retaining bearing 7, a reduction gearbox shell 2, a U-shaped support 10 inside the reduction gearbox, a gear set 11, a main shaft 4, a motor rotor 6 and a main shaft gear 3;

the worm 9 is sleeved on the motor output shaft 8 in an interference fit mode, and the motor output shaft 8 penetrates through the worm 9 and protrudes out of the head. The shell of the motor 1 is fixed on the shell 2 of the reduction gearbox by screws, and the output shaft 8 of the motor penetrates through the worm 9 and the head part of the output shaft is provided with a U-shaped support 10 inside the reduction gearbox. When the direct current motor is locked, the worm 9 on the motor output shaft 8 is axially blocked by the U-shaped support 10 in the reduction gearbox shell without moving, so that the axial sticking of the rotor 6 in the motor and the end face of the oil-containing bearing 7 is prevented; when the motor rotates reversely, the starting torque is small, and the starting is easy, so that the reduction gearbox is prevented from being blocked.

In this example: the worm 9 is sleeved on the motor output shaft 8 in an interference fit mode, the output shaft 8 penetrates through the worm 9 and extends out of the head, and the head extending part is provided with a U-shaped support 10 on the reduction gearbox shell 2.

In this example: a U-shaped support 10 is arranged in the reduction gearbox shell 2, and a motor output shaft 8 penetrates through the head part of the worm 9 and is clamped on the U-shaped support 10 to freely rotate and cannot axially move.

In this example: the diameter of the worm 9 is larger than the section of the U-shaped support 10 in the reduction gearbox shell 2, the worm 9 is axially blocked, and the worm 9 and the motor output shaft 8 are prevented from axially moving. The end face of the inner rotor 6 on the output shaft 8 is prevented from being stuck to the end face of the oil-retaining bearing 7 in the axial direction.

In light of the above, the present invention is not limited to the above embodiments, and various changes and modifications can be made by the worker without departing from the scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a dead structure of DC motor reducing gear box anti-sticking which characterized in that: comprises the following steps: the motor, the worm, the motor output shaft, the motor oil-containing bearing, the reduction gearbox shell, the U-shaped support in the reduction gearbox, the gear set and the output shaft are sleeved on the motor output shaft in an interference fit mode, the output shaft penetrates through the worm and extends out of the head, and the U-shaped support is arranged on the reduction gearbox shell of the head extending part.

2. The direct current motor reduction box anti-jamming structure according to claim 1, characterized in that: a U-shaped supporting motor output shaft is arranged in the shell of the reduction gearbox, penetrates through the head outlet part of the worm, is clamped on the U-shaped support, can freely rotate and cannot axially move.

3. The direct current motor reduction box anti-jamming structure according to claim 1, characterized in that: the diameter of the worm is larger than the U-shaped supporting section in the shell of the reduction gearbox, the worm is axially blocked, the worm and the motor output shaft are prevented from axially moving, and the end face of an inner rotor on the output shaft is prevented from being axially attached to the end face of an oil-retaining bearing.