CN213976769U

CN213976769U - Speed-limiting fixed pulley

Info

Publication number: CN213976769U
Application number: CN202022270321.7U
Authority: CN
Inventors: 王松伟; 孙吉
Original assignee: Jilin Xinda Iron and Steel Co Ltd
Current assignee: Jilin Xinda Iron and Steel Co Ltd
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2021-08-17
Anticipated expiration: 2030-10-13

Abstract

A speed-limiting fixed pulley comprises a side plate, a top plate, a rotating shaft, a positioning cylinder, a contact type rotating speed sensor, a spring, a cross beam, a cylinder, a CPU and a speed reducing block; the number of the side plates is two, and the side plates are arranged oppositely; the rotating shaft is arranged between the two side plates; the uppermost ends of the two side plates are connected through a top plate; a positioning cylinder is arranged at the center of the lower end face of the top plate; a spring is arranged in the positioning cylinder, one end of the spring is connected with the lower end face of the top plate, and the other end of the spring is connected with a contact type rotation speed sensor; the contact type rotating speed sensor is arranged in the positioning cylinder; the cross beam is arranged on the side plate; and the cross beam is provided with an air cylinder, and a piston rod of the air cylinder is respectively connected with two ends of the speed reducing block. The utility model discloses the effectual moving speed who controls the rope.

Description

Speed-limiting fixed pulley

Technical Field

The utility model relates to a fixed pulley, especially a fixed pulley that can restrict the haulage rope speed belongs to lifting device technical field.

Background

The fixed pulley is a pulley with a fixed shaft position and is used for changing the direction of force, one end of a rope on the fixed pulley is connected with a force application direction, and the other end of the rope is connected with goods; when a heavy object is pulled, the force application direction can be converted into the direction of the easy-to-pull force by using the fixed pulley, so that the goods can be lifted more easily; however, in the actual use process, sometimes the force application party does not grasp the rope, or the rope moving speed is too fast due to the failure of mechanical equipment, which may cause the goods to be crashed due to too fast speed when falling to the ground; therefore, a fixed pulley capable of ensuring that the moving speed of the rope is not too high when the rope pulls the goods is needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a speed-limiting fixed pulley, it not only can guarantee that the rope moving speed on the fixed pulley is not too fast, but also can protect the safety of goods to a certain extent.

The problem is solved through following technical scheme:

a speed-limiting fixed pulley comprises a side plate, a top plate, a rotating shaft, a positioning cylinder, a contact type rotating speed sensor, a spring, a cross beam, a cylinder, a CPU and a speed reducing block; the number of the side plates is two, and the side plates are arranged oppositely; the rotating shaft is arranged between the two side plates; the uppermost ends of the two side plates are connected through a top plate; a positioning cylinder is arranged at the center of the lower end face of the top plate; a spring is arranged in the positioning cylinder, one end of the spring is connected with the lower end face of the top plate, and the other end of the spring is connected with a contact type rotation speed sensor; the contact type rotating speed sensor is arranged in the positioning cylinder; the cross beam is arranged on the side plate; the cross beam is provided with an air cylinder, and a piston rod of the air cylinder is connected with the speed reducing block; the signal output end of the contact type rotating speed sensor is connected with the signal input end of the CPU through an A/D converter; and the signal output end of the CPU is connected with the signal control end of the air cylinder through a D/A converter.

The speed limiting fixed pulley is additionally provided with a universal ball; the universal balls are uniformly arranged on the inner wall of the side plate.

In the speed-limiting fixed pulley, the axis of the positioning cylinder points to the central point of the rotating shaft.

In the speed-limiting fixed pulley, the center line of the cylinder points to the center point of the rotating shaft.

The utility model discloses a contact rotational speed sensor detects the moving speed of rope effectively to give CPU with this signal transmission, CPU is judging the rope and is speeding up the back, and the control cylinder stretches out the speed reduction piece, makes speed reduction piece and pivot centre gripping rope, thereby slows down the moving speed of rope and gets off, and the effectual overspeed accident of controlling the rope has guaranteed the safety of goods.

Drawings

Fig. 1 is a schematic view of the three-dimensional structure of the present invention.

The list of labels in the figure is: 1. the device comprises a side plate, a top plate, a rotating shaft, a positioning cylinder, a contact type rotating speed sensor, a universal ball, a cross beam, an air cylinder and a speed reducing block, wherein the top plate is 2, the rotating shaft is 3, the positioning cylinder is 4, the contact type rotating speed sensor is 5, the universal ball is 6, the cross beam is 7, the air cylinder is 8, and.

Detailed Description

Referring to fig. 1, the utility model comprises a side plate 1, a top plate 2, a rotating shaft 3, a positioning cylinder 4, a contact type rotation speed sensor 5, a spring, a beam 7, a cylinder 8, a CPU and a speed reduction block 9; the number of the side plates 1 is two, and the side plates are arranged oppositely; the rotating shaft 3 is arranged between the two side plates 1; the rope is wound on the rotating shaft 3, the two ends of the rope are respectively connected with the force application part and the goods, and labor is saved by means of the movable pulley; the uppermost ends of the two side plates 1 are connected through a top plate 2; a positioning cylinder 4 is arranged at the center of the lower end face of the top plate 2; a spring is arranged in the positioning cylinder 4, one end of the spring is connected with the lower end face of the top plate 2, and the other end of the spring is connected with a contact type rotation speed sensor 5; the rolling ball on the contact type rotation speed sensor 5 is pressed on the rope in a contact mode, and the spring is used for helping the contact type rotation speed sensor 5 to be tightly pressed on the rope in a contact mode, so that the real-time moving speed of the rope can be detected more accurately;

the contact type rotating speed sensor 5 is arranged in the positioning cylinder 4; the cross beam 7 is arranged on the side plate 1; the cross beam 7 is provided with an air cylinder 8, and a piston rod of the air cylinder 8 is connected with a speed reducing block 9; the cylinder 8 extends out of the piston rod to enable the speed reducing block 9 to tightly press the rope on the rotating shaft 3, so that the moving speed of the rope is reduced; the signal output end of the contact type rotating speed sensor 5 is connected with the signal input end of the CPU through an A/D converter; the signal output end of the CPU is connected with the signal control end of the air cylinder 8 through a D/A converter; when the speed data of rope movement collected by the contact type rotation speed sensor 5 is transmitted to the CPU, and the CPU judges that the rope is overspeed at the moment, the CPU gives a signal to the air cylinder 8 to enable the air cylinder to extend out of the piston rod, and the rope is tightly pressed on the rotating shaft 3 by the speed reducing block 9, so that the moving speed of the rope is reduced, and the safety of goods is protected.

In order to reduce the friction of the rope on the fixed pulley and prolong the service life of the rope, the fixed pulley is provided with a universal ball 6; universal ball 6 evenly sets up on 1 inner wall of curb plate, when the rope removed and rubbed 1 inner wall of curb plate on pivot 3, universal ball 6 on 1 inner wall of curb plate can reduce the friction between rope and the curb plate 1 to the life of extension rope.

The axis of the positioning cylinder 4 points to the central point of the rotating shaft 3, so that the contact type rotating speed sensor 5 can be ensured to be accurately contacted with a rope, and speed data can be acquired.

The central line of the cylinder 8 points to the central point of the rotating shaft 3, so that the deceleration block 9 is ensured to contact and press the rope on the rotating shaft 3 most efficiently.

The model of the CPU module in the utility model is 87C196 KC.

Claims

1. A speed-limiting fixed pulley is characterized in that: the device comprises a side plate (1), a top plate (2), a rotating shaft (3), a positioning cylinder (4), a contact type rotating speed sensor (5), a spring, a cross beam (7), an air cylinder (8), a CPU and a speed reducing block (9); the number of the side plates (1) is two, and the side plates are arranged oppositely; the rotating shaft (3) is arranged between the two side plates (1); the uppermost ends of the two side plates (1) are connected through a top plate (2); a positioning cylinder (4) is arranged at the center of the lower end face of the top plate (2); a spring is arranged in the positioning cylinder (4), one end of the spring is connected with the lower end face of the top plate (2), and the other end of the spring is connected with a contact type rotation speed sensor (5); the contact type rotating speed sensor (5) is arranged in the positioning cylinder (4); the cross beam (7) is arranged on the side plate (1); the cross beam (7) is provided with an air cylinder (8), and a piston rod of the air cylinder (8) is connected with a speed reducing block (9); the signal output end of the contact type rotating speed sensor (5) is connected with the signal input end of a CPU (Central processing Unit) through an A/D (analog/digital) converter; and the signal output end of the CPU is connected with the signal control end of the air cylinder (8) through a D/A converter.

2. The speed-limited fixed sheave of claim 1, wherein: a universal ball (6) is additionally arranged; the universal balls (6) are uniformly arranged on the inner wall of the side plate (1).

3. The speed-limited fixed sheave of claim 2, wherein: the axis of the positioning cylinder (4) points to the central point of the rotating shaft (3).

4. The speed-limited fixed sheave of claim 3, wherein: the central line of the cylinder (8) points to the central point of the rotating shaft (3).