CN210898806U

CN210898806U - Speed limiting device of motor power system

Info

Publication number: CN210898806U
Application number: CN201921978483.7U
Authority: CN
Inventors: 王凯
Original assignee: Wuxi Biyinte Technology Co ltd
Current assignee: Wuxi Biyinte Technology Co ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-06-30
Anticipated expiration: 2029-11-15

Abstract

The utility model discloses an electric machine power system speed limiting device. Comprises a brake device, a speed limiting device and a rotating shaft; the brake device is sleeved on the rotating shaft and comprises a rotor, a spring, friction plates and a rear end cover, wherein the spring is arranged between the rotor and the rear end cover in an overhead mode, and the friction plates are respectively arranged between the spring and the rotor and between the spring and the rear end cover; the speed limiting device comprises a contact block, a centrifugal balancing weight, a speed limiting spring, a power switch and a switch support, wherein the centrifugal balancing weight is sleeved on the rotating shaft, one end of the contact block extends into the centrifugal balancing weight, the other end of the contact block is arranged on the power switch in an overhead mode, the power switch is arranged on the switch support, a slot is formed in the contact block, the speed limiting spring is arranged in the slot, the rotating shaft is connected with the contact block through the inserted slot, and the speed limiting spring is arranged between the rotating shaft and the bottom face of the slot in an. The utility model provides the high running accuracy of motor prevents the motor overspeed operation.

Description

Speed limiting device of motor power system

The technical field is as follows:

the utility model belongs to the technical field of push rod motor control, in particular to electric machine power system speed limiting device.

Background art:

after the power is cut off, the general push rod motor can still continuously rotate for a period of time, and the operation accuracy is not high. In addition, when the motor works, the rotating speed of the motor cannot be effectively limited, so that the motor exceeds the specified speed, and the service life of the motor is influenced.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

The utility model has the following contents:

an object of the utility model is to provide a motor power system speed limiting device to overcome the defect among the above-mentioned prior art.

In order to achieve the above object, the utility model provides an electric machine power system speed limiting device, include: a brake device, a speed limiting device and a rotating shaft; the brake device is sleeved on the rotating shaft and comprises a rotor, a spring, friction plates and a rear end cover, wherein the spring is arranged between the rotor and the rear end cover in an overhead mode, and the friction plates are respectively arranged between the spring and the rotor and between the spring and the rear end cover; the speed limiting device comprises a contact block, a centrifugal balancing weight, a speed limiting spring, a power switch and a switch support, wherein the centrifugal balancing weight is sleeved on the rotating shaft, one end of the contact block extends into the centrifugal balancing weight, the other end of the contact block is arranged on the power switch in an overhead mode, the power switch is arranged on the switch support, a slot is formed in the contact block, the speed limiting spring is arranged in the slot, the rotating shaft is connected with the contact block through the inserted slot, and the speed limiting spring is arranged between the rotating shaft and the bottom face of the slot in an.

Compared with the prior art, the utility model discloses following beneficial effect has:

the rotor can be rapidly stopped after power failure through the friction plate and the spring, and the running precision of the motor is improved. The centrifugal balancing weight drives the contact block to be separated from the power switch when rotating at high speed, so that the motor is prevented from running at an excessive speed.

Description of the drawings:

FIG. 1 is a schematic structural view of a speed limiting device of a motor power system of the present invention;

the reference signs are: 1-rotating shaft, 2-rotor, 3-spring, 4-friction plate, 5-rear end cover, 6-contact block, 7-centrifugal balancing weight, 8-speed limiting spring, 9-power switch, 10-switch bracket and 11-machine shell.

The specific implementation mode is as follows:

the following detailed description of the embodiments of the present invention is provided, but it should be understood that the scope of the present invention is not limited by the embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

As shown in fig. 1, a speed limiting device of an electric machine power system includes: a brake device, a speed limiting device and a rotating shaft 1; the brake device and the rotating shaft 1 are arranged in the shell 11; the brake device is sleeved on the rotating shaft 1 and comprises a rotor 2, a spring 3, friction plates 4 and a rear end cover 5, wherein the spring 3 is arranged between the rotor 2 and the rear end cover 5 in an overhead mode, and the friction plates 4 are respectively arranged between the spring 3 and the rotor 2 and between the spring 3 and the rear end cover 5; the speed limiting device comprises a contact block 6, a centrifugal balancing weight 7, a speed limiting spring 8, a power switch 9 and a switch support 10, wherein the centrifugal balancing weight 7 is sleeved on the rotating shaft 1, one end of the contact block 6 extends into the centrifugal balancing weight 7, the other end of the contact block 6 is arranged on the power switch 9 in an overhead mode, the power switch 9 is arranged on the switch support 10, a slot is formed in the contact block 6, the speed limiting spring 8 is arranged in the slot, the rotating shaft 1 is connected with the contact block 6 through the insertion slot, and the speed limiting spring 8 is arranged between the rotating shaft 1 and the bottom face of the slot in an.

After the motor is powered off, the friction plate is propped against the rear end cover and the rotor by the elastic force of the spring, and because the rear end cover is fixed, the rotor continues to rotate, relative rotation can occur between the rotor and the friction plate and between the friction plate and the rear end cover, friction force is generated, the rotor is prevented from continuing to rotate, the rotor stops rotating very quickly, and the running precision of the motor is improved.

When the motor rotating shaft rotates, the centrifugal balancing weight moves backwards under the action of centrifugal force, backward pressure is applied to the contact block, and when the pressure is greater than the elastic force of the speed-limiting spring, the contact block is far away from the power switch, and the power switch is disconnected. The rotating speed of the motor can be effectively limited, and when the rotating speed of the motor is greater than a set value, the power supply is directly disconnected, so that the rotating speed of the motor is prevented from exceeding the limited rotating speed.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. A speed limiting device of a motor power system is characterized in that: comprises a brake device, a speed limiting device and a rotating shaft; the brake device is sleeved on the rotating shaft and comprises a rotor, a spring, friction plates and a rear end cover, wherein the spring is arranged between the rotor and the rear end cover in an overhead mode, and the friction plates are respectively arranged between the spring and the rotor and between the spring and the rear end cover; the speed limiting device comprises a contact block, a centrifugal balancing weight, a speed limiting spring, a power switch and a switch support, wherein the centrifugal balancing weight is sleeved on the rotating shaft, one end of the contact block extends into the centrifugal balancing weight, the other end of the contact block is arranged on the power switch in an overhead mode, the power switch is arranged on the switch support, a slot is formed in the contact block, the speed limiting spring is arranged in the slot, the rotating shaft is connected with the contact block through the inserted slot, and the speed limiting spring is arranged between the rotating shaft and the bottom face of the slot in an.