CN201201882Y - Electric hoist safety brake - Google Patents

Abstract

The utility model relates to an electric hoist safety brake, which comprises a brake housing (12), a sensor (1), a ring gear (2), a traction electromagnet (3), a steel wire rope (4), and a sensor (1) arranged in the brake housing (12). Spring (5), pulley assembly (6), pawl (7), ratchet (8) and brake ring (10), the brake ring (10) is compounded on the inner ring of the ratchet (8), and the ratchet (8) Tightly sleeved on the reel (9) of the electric hoist; the ring gear (2) is fixedly installed on the reel (9) of the electric hoist close to the ratchet (8); the traction electromagnet (3) and the pulley assembly (6) Fixedly installed on the brake housing (12), the ratchet (7) is placed beside the ratchet (8), the middle of the ratchet (7) is hinged on the brake housing (12), the traction electromagnet (3) and the wire rope (4) one end is connected, and the other end of the wire rope (4) walks around the pulley assembly (6) and then connects with the pawl (7), and the pawl (7) cooperates with the ratchet (8), and the sensor (1) is fixedly installed on On the brake housing (12), and placed on the side of the outer edge of the ring gear (2), a certain detection distance is kept from the outer edge of the ring gear (2), and the sensor (1) is connected to the traction electromagnet (3) through a wire. The utility model has high braking sensitivity, safe and reliable braking.

Description

Electric hoist safety brake

technical field

The utility model relates to an electric hoist safety brake. It belongs to the technical field of safety devices for hoisting machinery.

Background technique

The previous electric hoist safety brake includes a ratchet, its matching pawl and the corresponding pulling spring. The ratchet is set on the reel of the electric hoist and closely matched with the reel. There is a lotus disc on the side of the ratchet, and a One rotating wheel, when working, the ratchet rotates with the reel at a normal speed, and at the same time, the rotating wheel on the ratchet keeps tracking and circumscribed with the lotus disc all the time. When the hoisted object drives the reel to rotate at a sudden speed, the wheel on the ratchet that tracks and rotates relative to the lotus disc suddenly breaks away, causing the wheel to swing, and the ratchet pushes into the ratchet wheel and blocks the ratchet wheel, so as to achieve safe braking. Purpose. In actual manufacturing and use, the lotus disk is difficult to process, difficult to grasp the size, and low braking sensitivity. If the runner does not swing in place, the pawl will not be able to block the ratchet, and the safety of the above products cannot be guaranteed.

Contents of the invention

The purpose of the utility model is to overcome the shortcomings of the prior art, and provide a safety brake for an electric hoist with high braking sensitivity, safety and reliability, so as to ensure safe braking of the electric hoist.

The purpose of this utility model is achieved as follows: an electric hoist safety brake, which is characterized in that the brake includes a brake housing and a sensor, a ring gear, a traction electromagnet, a wire rope, a spring, a pulley assembly, a ratchet claws, ratchets and brake rings,

The brake ring is compounded on the inner ring of the ratchet, and the ratchet is tightly sleeved on the reel of the electric hoist;

The ring gear is fixedly installed on the reel of the electric hoist close to the ratchet wheel;

The traction electromagnet and the pulley assembly are fixedly installed on the brake housing, the pawl is placed beside the ratchet, the middle of the pawl is hinged on the brake housing, the traction electromagnet is connected to one end of the wire rope, and the other end of the wire rope bypasses the pulley assembly and then connects with the ratchet. The claws are connected, and the pawls cooperate with the ratchet,

The sensor is fixedly installed on the brake casing, and placed beside the outer edge of the ring gear, keeping a certain detection distance from the outer edge of the ring gear, and the sensor is connected with the traction electromagnet through a wire.

working principle

The safety brake is used when the hoisted object accelerates and falls uncontrollably, the sensor obtains a signal by detecting the number of teeth of the ring gear (the number of operating teeth can be adjusted according to needs), and transmits it to the traction electromagnet, and the traction electromagnet moves upward to pull the wire rope. Thereby pulling the tail of the ratchet, the ratchet pushes into the ratchet wheel and blocks the ratchet wheel, the ratchet wheel stops rotating, the brake ring of the inner ring of the ratchet wheel rubs against the reel, and the reel is forcibly restricted from continuing to rotate, thereby achieving the purpose of safe braking.

The beneficial effects of the utility model are:

When the electric hoist is accelerated and falls uncontrollably by heavy objects, it can automatically realize safety braking, with high sensitivity and good reliability, thus avoiding possible accidents such as personal injury and property damage, and improving the safety of the electric hoist. sex.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the electric hoist safety brake of the utility model.

Among the figure: sensor 1, ring gear 2, traction electromagnet 3, wire rope 4, spring 5, pulley assembly 6, pawl 7, ratchet 8, reel 9, brake ring 10, screw 11, brake housing 12.

Detailed ways

Referring to Fig. 1, the utility model is an electric hoist safety brake, which mainly consists of a brake housing 12 and a sensor 1, a ring gear 2, a traction electromagnet 3, a steel wire rope 4, a spring 5, a pulley assembly 6, Pawl 7, ratchet 8 and brake ring 10 are formed.

The brake ring 10 is glued to the inner ring of the ratchet 8 with glue, and the ratchet 8 is divided into two halves, and screwed with screws 11 to be fitted on the reel 9 of the electric hoist and closely matched with the reel 9;

The ring gear 2 is fixedly installed on the reel 9 of the electric hoist close to the ratchet 8;

The traction electromagnet 3 and the pulley assembly 6 are fixedly installed on the brake housing 12, the pawl 7 is placed beside the ratchet 8, the middle of the pawl 7 is hinged on the brake housing 12, the traction electromagnet 3 is connected to one end of the steel wire rope 4, and the steel wire rope 4 The other end goes around the pulley assembly 6 and then connects with the tail of the ratchet 7, a spring 5 is embedded between the other end of the wire rope 4 and the tail of the ratchet 7, and the ratchet 7 cooperates with the ratchet 8,

The sensor 1 is fixedly installed on the brake housing 12, and placed beside the outer edge of the ring gear 2, keeping a certain detection distance with the outer edge of the ring gear 2, and the sensor 1 is connected with the traction electromagnet 3 through a wire.

Claims (2)

1. An electric hoist safety brake, characterized in that the brake includes a brake housing (12) and a sensor (1), a ring gear (2), a traction electromagnet (3), and a wire rope arranged in the brake housing (12). (4), spring (5), pulley assembly (6), pawl (7), ratchet (8) and brake ring (10), The brake ring (10) is compounded on the inner ring of the ratchet (8), and the ratchet (8) is tightly sleeved on the reel (9) of the electric hoist; The ring gear (2) is fixedly set on the reel (9) of the electric hoist close to the ratchet (8); The traction electromagnet (3) and the pulley assembly (6) are fixedly installed on the brake housing (12), the pawl (7) is placed beside the ratchet (8), and the middle of the ratchet (7) is hinged on the brake housing (12 ), the traction electromagnet (3) is connected with one end of the wire rope (4), and the other end of the wire rope (4) bypasses the pulley assembly (6) and then connects with the pawl (7), and the pawl (7) is connected with the ratchet (8) Cooperate, The sensor (1) is fixedly installed on the brake housing (12), and is placed beside the outer edge of the ring gear (2), keeping a certain detection distance from the outer edge of the ring gear (2). The sensor (1) passes the wire Connect with traction electromagnet (3). 2. The electric hoist safety brake according to claim 1, characterized in that a spring (5) is embedded between the other end of the wire rope (4) and the tail of the ratchet (7).

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