CN214326984U

CN214326984U - Overweight-preventing pulley device with mechanical self-locking function

Info

Publication number: CN214326984U
Application number: CN202023086943.0U
Authority: CN
Inventors: 刘海南; 辛亮智
Original assignee: Guangzhou Lianchuang Stage Equipment Co ltd
Current assignee: Guangzhou Lianchuang Stage Equipment Co ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-10-01
Anticipated expiration: 2030-12-18

Abstract

The utility model relates to a take overweight pulley gear of preventing of mechanical auto-lock, including interior gallows, outer gallows, main shaft and pulley, interior gallows and outer gallows all are "the U" type form, the pulley is located the interior gallows inboard, the main shaft middle part is connected fixedly with the pulley, the both ends of main shaft respectively with the pin joint of interior gallows, interior gallows is located the outer gallows inboard, open the vertical slot hole that allows the main shaft to pass on two curb plates of the left and right sides of outer gallows respectively, two curb plate outsides of the left and right sides of outer gallows are located the slot hole below and are equipped with the auto-lock groove, the both ends of main shaft are connected with the auto-lock spare with the auto-lock groove complex respectively, when the auto-lock spare imbeds in the auto-lock groove, the main shaft can't rotate; the top of the inner hanger is fixedly connected with a connecting rod, the connecting rod upwards passes through the outer hanger, the limiting part is fixed at the upper end of the connecting rod, and the compression spring compression sleeve is sleeved on the connecting rod and compressed between the limiting part and the outer hanger. The defect that the service life of the steel wire rope is shortened and even the personal safety of operators is threatened due to overload operation can be avoided.

Description

Overweight-preventing pulley device with mechanical self-locking function

Technical Field

The utility model belongs to the technical field of mechanical hoisting equipment and specifically relates to a take overweight pulley gear of preventing of machinery auto-lock is related to.

Background

The conventional hanging pulley of the existing winch only plays a hanging role and is not used for overload prevention detection, the condition that an operator cannot evaluate the weight of a lifted heavy object on site can be met, the overload operation of equipment is caused, the service life of a steel wire rope is shortened, and the steel wire rope is likely to be worn and broken after a long time, so that the personal safety of the operator on site cannot be guaranteed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough, provide a take overweight pulley gear of preventing of mechanical auto-lock, when the weight that the heavy object was hung to the pulley surpassed the default, the pulley will unable continuation rotation, can remind the overweight off-load of operating personnel this moment, can avoid the overload operation and the wire rope life who leads to reduces the defect that constitutes the threat even to operating personnel personal safety from this.

The purpose of the utility model is realized through the following technical scheme:

an overweight-preventing pulley device with mechanical self-locking comprises an inner hanger, a main shaft and pulleys, wherein the inner hanger is in an inverted U shape, the pulleys are located on the inner side of the inner hanger, the middle of the main shaft is fixedly connected with the pulleys, two ends of the main shaft are respectively pivoted with the inner hanger, the pulley device further comprises an outer hanger, a pressure spring and a limiting part, the outer hanger is in an inverted U shape, the inner hanger is located on the inner side of the outer hanger, vertical long holes allowing the main shaft to pass through are respectively formed in the left side plate and the right side plate of the outer hanger, self-locking grooves are formed below the long holes in the outer side of the left side plate and the right side plate of the outer hanger, two ends of the main shaft are respectively connected with self-locking pieces matched with the self-locking grooves, and when the self-locking pieces are embedded into the self-locking grooves, the main shaft cannot rotate; the top of the inner hanger is fixedly connected with a connecting rod, the connecting rod upwards penetrates through the outer hanger, the limiting part is fixed at the upper end of the connecting rod, and the pressure spring compression sleeve is sleeved on the connecting rod and compressed between the limiting part and the outer hanger.

As a further extension of the above scheme, the connecting rod is a threaded rod, the limiting member is an adjusting nut in threaded connection with the connecting rod, and the compression length of the pressure spring can be adjusted by rotating the limiting member.

As a further extension of the above scheme, the self-locking piece is a ratchet wheel, and the self-locking groove is a U-shaped groove.

As a further extension of the above scheme, bearings are respectively arranged on the left side plate and the right side plate of the inner hanger, and the main shaft is connected with the bearings.

As a further extension of the above scheme, the left end and the right end of the main shaft are respectively fixedly sleeved with a shaft sleeve, and the two shaft sleeves are respectively positioned at the outer side ends of the two bearings and abut against the bearings.

The utility model discloses following beneficial effect has: the utility model discloses a take overweight pulley gear of preventing of mechanical auto-lock, the pulley passes through the main shaft and installs on the inner hanger, the both ends of pulley are equipped with respectively and are used for with the self-locking piece of self-locking groove complex, during the use, hoist whole pulley gear fixedly through outer hanger, the inner hanger can reciprocate relatively to outer hanger at this moment, the bounce that utilizes the pressure spring to produce after being compressed can jack up the inner hanger, if the gravity of the heavy object that the pulley suspends in midair is less than or equal to the pressure spring to the elasticity of locating part at this moment, then the self-locking piece can not move down and imbed in the self-locking groove at this moment, pulley and main shaft all can free rotation; if the gravity of the weight that the pulley suspends in midair is greater than when pressure spring is to the elasticity of locating part, the weight will stimulate the pulley and move down together with interior gallows, reach and can drop down the pulley to when the self-locking piece card goes into the self-locking groove until the gravity of weight, the pulley can't rotate again this moment, staff's pulling wire rope can obviously feel the frictional force grow, wire rope is difficult to continue the pulling, so can remind operating personnel to stop promoting and inspect the weight of partial shipment weight, with this extension wire rope's life, avoid overweight, guarantee below operating personnel's safety.

Drawings

Fig. 1 is a schematic structural view of the overweight prevention pulley device with mechanical self-locking of the present invention;

fig. 2 is a schematic view of the middle section of the overweight prevention pulley device with mechanical self-locking of the present invention.

The specific structure in the figure illustrates that: the self-locking device comprises an outer hanger 1, a long hole 11, a self-locking groove 12, an inner hanger 2, a pulley 3, a main shaft 4, a self-locking piece 41, a bearing 42, a shaft sleeve 43, a connecting rod 51, a pressure spring 52 and a limiting piece 53.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments shown in the drawings.

Referring to fig. 1-2, an overweight prevention pulley device with mechanical self-locking comprises an inner hanger 2, a main shaft 4 and a pulley 3, wherein the inner hanger 2 is in an inverted U shape, the pulley 3 is positioned at the inner side of the inner hanger 2, the middle part of the main shaft 4 is fixedly connected with the pulley 3, two ends of the main shaft 4 are respectively pivoted with the inner hanger 2, the pulley device further comprises an outer hanger 1, a pressure spring 52 and a limiting piece 53, the outer hanger 1 is in an inverted U shape, the inner hanger 2 is positioned at the inner side of the outer hanger 1, two vertical long holes 11 allowing the main shaft 4 to pass through are respectively arranged on two left and right side plates of the outer hanger 1, self-locking grooves 12 are respectively arranged below the long holes 11 on the outer sides of the two left and right side plates of the outer hanger 1, two ends of the main shaft 4 are respectively connected with self-locking pieces 41 matched with the self-locking grooves 12, when the self-locking pieces 41 are embedded into the self-locking grooves 12, the spindle 4 cannot rotate; the top of the inner hanger 2 is fixedly connected with a connecting rod 51, the connecting rod 51 upwards passes through the outer hanger 1, the limiting part 53 is fixed at the upper end of the connecting rod 51, and the pressure spring 52 is sleeved on the connecting rod 51 in a compression manner and compressed between the limiting part 53 and the outer hanger 1.

When the pulley device is used, the whole pulley device is hoisted and fixed through the outer hanger 1, the inner hanger 2 can move up and down relative to the outer hanger 1 at the moment, the inner hanger 2 can be jacked up by utilizing the rebounding force generated after the pressure spring 52 is compressed, at the moment, if the gravity of a heavy object suspended by the pulley 3 is less than or equal to the elastic force of the pressure spring 52 on the limiting part 53, the self-locking piece 41 cannot move down to be embedded into the self-locking groove 12 at the moment, and the pulley 3 and the main shaft 4 can freely rotate; if the gravity of the weight suspended by the pulley 3 is greater than the elastic force of the pressure spring 52 on the limiting part 53, the weight pulls the pulley 3 and the inner hanger 2 to move downwards until the gravity of the weight reaches the value that the pulley can be pulled downwards to the self-locking part 41 to be clamped into the self-locking groove 12 (the load at the moment is greater than the preset maximum load value), at the moment, the pulley 3 cannot rotate any more, a worker pulls the steel wire rope to obviously feel the increase of the friction force, the steel wire rope is difficult to pull continuously, so that the operator can be reminded to stop lifting and check the weight of the split-charging weight, the service life of the steel wire rope is prolonged, overweight is avoided, and the safety of the operator below is ensured.

As a further extension of the above solution, the connecting rod 51 is a threaded rod, the limiting member 53 is an adjusting nut in threaded connection with the connecting rod 51, and the compression length of the pressure spring 52 can be adjusted by rotating the limiting member 53. That is, the compression length of the pressure spring 52 can be freely and steplessly adjusted by using the thread structure, and further the designed maximum load value can be adjusted, and when the compression amount of the pressure spring 52 is larger, it indicates that the force required for continuously compressing against the spring force is larger, that is, the designed maximum load value is larger.

As a further extension of the above solution, the self-locking piece 41 is a ratchet, and the self-locking groove 12 is a U-shaped groove. Namely, the main shaft 4 can be locked only by clamping the ratchet wheel into the U-shaped groove, and the self-locking structure has simple structure and good reliability.

As a further extension of the above solution, bearings 42 are respectively disposed on the left and right side plates of the inner hanger 2, and the main shaft 4 is connected to the bearings 42. The provision of the bearing 42 can greatly reduce the frictional resistance received when the main shaft 4 rotates, and reduce the weight lifting resistance.

As a further extension of the above scheme, the left end and the right end of the main shaft 4 are respectively fixedly sleeved with a shaft sleeve 43, and the two shaft sleeves 43 are respectively located at the outer ends of the two bearings 42 and abut against the bearings 42. The shaft sleeve 43 is used for limiting the axial movement of the main shaft 4, and the structure is firm and reliable.

The above mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention should not be limited thereby, that is, all the simple equivalent changes and modifications made according to the claims and the description of the present invention are still included in the scope of the present invention.

Claims

1. The utility model provides a take overweight pulley gear of preventing of mechanical auto-lock, includes interior gallows, main shaft and pulley, interior gallows is "the U" type form, the pulley is located interior gallows is inboard, the main shaft middle part is connected fixedly with the pulley, the both ends of main shaft respectively with interior gallows pin joint, its characterized in that: the spindle is characterized by further comprising an outer hanging bracket, a pressure spring and a limiting piece, wherein the outer hanging bracket is in an inverted U shape, the inner hanging bracket is positioned on the inner side of the outer hanging bracket, vertical long holes allowing the spindle to pass through are formed in the left side plate and the right side plate of the outer hanging bracket respectively, self-locking grooves are formed in the outer sides of the left side plate and the right side plate of the outer hanging bracket and below the long holes, self-locking pieces matched with the self-locking grooves are connected to two ends of the spindle respectively, and when the self-locking pieces are embedded into the self-locking grooves, the spindle cannot rotate; the top of the inner hanger is fixedly connected with a connecting rod, the connecting rod upwards penetrates through the outer hanger, the limiting part is fixed at the upper end of the connecting rod, and the pressure spring compression sleeve is sleeved on the connecting rod and compressed between the limiting part and the outer hanger.

2. The device of claim 1, wherein the pulley is a pulley with mechanical self-locking device for preventing overweight, and comprises: the connecting rod is a threaded rod, the limiting part is an adjusting nut in threaded connection with the connecting rod, and the compression length of the pressure spring can be adjusted by rotating the limiting part.

3. The device of claim 1, wherein the pulley is a pulley with mechanical self-locking device for preventing overweight, and comprises: the self-locking piece is a ratchet wheel, and the self-locking groove is a U-shaped groove.

4. The device of claim 1, wherein the pulley is a pulley with mechanical self-locking device for preventing overweight, and comprises: and bearings are respectively arranged on the left side plate and the right side plate of the inner hanging bracket, and the main shaft is connected with the bearings.

5. The device of claim 4, wherein the pulley is a pulley with mechanical self-locking function, and the device comprises: the left end and the right end of the main shaft are respectively fixedly sleeved with a shaft sleeve, and the two shaft sleeves are respectively positioned at the outer side ends of the two bearings and abut against the bearings.