CN216312533U

CN216312533U - Bidirectional mechanical braking paying-off tackle

Info

Publication number: CN216312533U
Application number: CN202122514926.0U
Authority: CN
Inventors: 不公告发明人
Original assignee: Guizhou Xinghai Yaoyang Technology Co ltd
Current assignee: Guizhou Xinghai Yaoyang Technology Co ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2022-04-15
Anticipated expiration: 2031-10-19

Abstract

The utility model discloses a bidirectional mechanical braking paying-off tackle which comprises a paying-off tackle main body, a forward overspeed braking mechanism and a reverse emergency braking mechanism, wherein the forward overspeed braking mechanism and the reverse emergency braking mechanism are respectively positioned on two sides of the paying-off tackle main body. The utility model realizes the forward overspeed braking and reverse emergency braking functions which are needed urgently on the basis of considering the tension stringing function of the traditional paying-off tackle. The utility model has the advantages of full mechanical structure design, compact structure, convenient installation and maintenance, lower cost and convenient batch popularization and use.

Description

Bidirectional mechanical braking paying-off tackle

Technical Field

The utility model relates to the technical field of electric power fittings, in particular to a bidirectional mechanical braking paying-off tackle.

Background

The paying-off tackle is a tackle for paying off corresponding cables when the cables are tensioned and strung. The paying-off tackle can be divided into a wire paying-off tackle, a ground wire paying-off tackle, an optical fiber composite overhead ground wire paying-off tackle and the like according to the types of threads. The pulley can be classified according to the number of pulleys, and can be divided into a single pulley, a three-wheel pulley, a five-wheel pulley, a seven-wheel pulley, a nine-wheel pulley and the like.

When the paying-off tackle is used for tension stringing, the cable in each paying-off tackle can droop and fall due to sudden traction loss or traction rope breakage, and serious casualties and property loss are caused below the cable.

To solve this problem, a device is needed to brake the cable in time when an abnormal situation (forward overspeed or reverse movement) occurs in the cable during the tension stringing process.

The device needs to fulfill the following functions:

1. the cable, the splicing sleeve and the traction rope can pass through the cable, the splicing sleeve and the traction rope, and the base function of the paying-off tackle is achieved;

2. enough braking force can be provided, braking is realized, and the braking distance meets the requirement;

3. the brake has the unlocking function, and can be unlocked after braking to restore normal work.

4. The cable is convenient to assemble and disassemble, and the device can be conveniently taken down after the stringing is completed.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems, the utility model provides a bidirectional mechanical braking paying-off tackle, which changes the situation that a common paying-off tackle cannot brake cables and cannot cope with traction loss or traction rope fracture, realizes normal stringing under common working conditions, can timely and actively brake the cables in emergency situations such as traction loss or traction rope fracture, continues stringing after traction is recovered to be normal, and avoids secondary disasters caused by accidents.

The utility model adopts the following technical scheme:

a bi-directional mechanical brake payoff block comprising: a paying-off pulley body; the positive overspeed braking mechanism is arranged on one side of the pay-off tackle main body along the movement direction of a cable and comprises a positive overspeed mounting bracket, a positive overspeed triggering assembly and a positive overspeed braking assembly, wherein when the cable moves in the positive direction and exceeds the speed limit, the positive overspeed triggering assembly drives the positive overspeed braking assembly to clamp the cable to realize braking; the reverse emergency braking mechanism is arranged on the other side of the paying-off tackle main body along the movement direction of the cable and comprises a reverse emergency mounting bracket, a reverse emergency triggering assembly and a reverse emergency braking assembly, and when the cable moves reversely, the reverse emergency triggering assembly drives the reverse emergency braking assembly to clamp the cable to realize braking.

Preferably, positive overspeed brake subassembly and reverse emergency braking subassembly all include hasp, couple, brake spring, connecting seat, two brake pads and two braking seat that slide, brake spring is fixed in the connecting seat both sides respectively with the couple along the direction that is on a parallel with the cable motion, and two brake pads are located the cable both sides respectively, the hasp links to each other with the couple lock, and when the hasp is rotatory, hasp and couple break away from the lock, and the connecting seat moves along being on a parallel with the cable motion direction under brake spring's pulling, can drive two brake pads and slide respectively on two braking seats that slide, and the slip of brake pad on the braking seat that slides has the displacement component of perpendicular to cable motion direction.

Preferably, the forward overspeed trigger assembly comprises a forward trigger support small roller which rolls synchronously when moving along with a cable, and a forward overspeed trigger flywheel which is connected with the forward trigger support small roller through a synchronous belt and a synchronous pulley, the forward overspeed trigger flywheel is provided with a centrifugal device, the centrifugal device comprises a centrifugal channel arranged on the wheel surface of the forward overspeed trigger flywheel, a centrifugal block and a return spring, and the centrifugal block and the return spring are arranged in the centrifugal channel, and the centrifugal block is abutted against the bottom of one end of the hasp to drive the rotation of the hasp.

Preferably, the number of the centrifugal devices is two.

Preferably, the reverse emergency triggering assembly comprises a reverse emergency supporting small roller which rolls synchronously when moving along with the cable and a reverse emergency triggering flywheel which is connected with the reverse emergency supporting small roller through a synchronous belt and a synchronous belt wheel, the outer circumference of the reverse emergency triggering flywheel is provided with one-way helical teeth, and the one-way helical teeth on the reverse emergency triggering flywheel are clamped with one end of the buckle.

Preferably, the distance between the braking sliding seat and the cable is gradually reduced along the direction far away from the hasp, an inclined plane is arranged on the braking block, the braking block is connected with the braking sliding seat in a sliding mode through the inclined plane, and the opposite surfaces of the two braking blocks are arranged in parallel to the movement direction of the cable.

Preferably, the two brake pads have resilient clamping layers secured to opposite faces thereof.

Preferably, a plurality of rotating rollers contacting with the inclined surface of the brake pad are arranged side by side on the brake sliding seat.

Preferably, the forward overspeed triggering assembly, the forward overspeed braking assembly, the reverse emergency triggering assembly and the reverse emergency braking assembly are all externally provided with protective covers.

Preferably, the forward overspeed mounting bracket and the reverse emergency mounting bracket are both hinged to the top of the pay-off tackle body.

The utility model has the beneficial effects that:

1. on the basis of taking the tension stringing function of the traditional stringing pulley into consideration, the utility model realizes the functions of forward overspeed braking and reverse emergency braking which are urgently needed, can generate active braking action on the damage caused by the problems of traction loss and traction rope fracture possibly occurring in the tension stringing operation process, and avoids secondary disaster after the cable slips.

2. The utility model has a modularized design, can realize the function addition of the existing product by additionally installing the installation interface on the common pay-off tackle and further installing the interfaces of the forward overspeed braking component and the reverse emergency braking component, and can also realize the maximum use of the existing equipment by simply dismounting the forward overspeed braking component and the reverse emergency braking component from the bidirectional mechanical braking pay-off tackle and using the bidirectional mechanical braking pay-off tackle as the common pay-off tackle for occasions without braking.

3. The utility model has the advantages of full mechanical structure design, compact structure, convenient installation and maintenance, lower cost and convenient batch popularization and use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention is further described below with reference to preferred embodiments and accompanying drawings. It is to be understood that the following detailed description is intended to be illustrative, and not restrictive, and that the appended drawings in the following description are intended to illustrate only some embodiments of the utility model, and not to limit the utility model.

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a bottom view of fig. 1.

FIG. 3 is a schematic structural diagram of the forward overspeed braking mechanism of FIG. 1.

Fig. 4 is a schematic structural view of the reverse emergency braking mechanism in fig. 1.

Fig. 5 is an internal structural view of the forward overspeed braking mechanism of fig. 3.

Fig. 6 is an internal structural view of the reverse emergency braking mechanism in fig. 4.

FIG. 7 is an enlarged view of the forward overspeed trigger assembly of FIG. 5.

Fig. 8 is an internal structure view of the centrifugal apparatus of fig. 7.

FIG. 9 is an enlarged view of the forward overspeed brake assembly of FIG. 5.

Fig. 10 is a schematic view of the buckle of fig. 9.

Fig. 11 is a schematic view of the structure of the brake shoe and the brake pad in fig. 10.

Fig. 12 is a schematic structural diagram of the reverse emergency triggering assembly in fig. 6.

Wherein the reference numerals include:

the cable 1, the pay-off tackle body 2, the main frame 201, the pulley 202, the forward overspeed braking mechanism 3, the reverse emergency braking mechanism 4, the forward overspeed mounting bracket 31, the forward overspeed trigger assembly 32, the forward overspeed trigger flywheel 321, the centrifugal device 3210, the centrifugal block 32101, the return spring 32102, the forward trigger support small roller 322, the forward overspeed braking assembly 33, the buckle 331, the elastic support 3311, the rigid support 3312, the hook 332, the connecting seat 333, the brake block 334, the brake sliding seat 335, the brake spring 336, the reverse emergency mounting bracket 41, the reverse emergency trigger assembly 42, the reverse emergency trigger flywheel 421, the reverse emergency support small roller 422, the one-way inclined teeth 4210 and the reverse emergency braking assembly 43.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the utility model without any inventive step, are within the scope of protection of the utility model.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the word "comprising" or "comprises", and the like, in this disclosure is intended to mean that the elements or items listed before that word, include the elements or items listed after that word, and their equivalents, without excluding other elements or items. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

The utility model is further illustrated with reference to the following figures and examples.

As shown in fig. 1 and 2, a bidirectional mechanical braking pay-off tackle comprises a pay-off tackle main body 2, a forward overspeed braking mechanism 3 and a reverse emergency braking mechanism 4; the forward overspeed braking mechanism 3 and the reverse emergency braking mechanism 4 are respectively arranged at two sides of the pay-off tackle main body 2 along the movement direction of the cable 1, and respectively realize the functions of forward overspeed braking and reverse emergency braking.

The payoff tackle body 2 includes components such as a pulley 202 and a main frame 201.

Forward overspeed brake mechanism 3 is shown in fig. 3 and 5 and comprises a forward overspeed mounting bracket 31, a forward overspeed trigger assembly 32 and a forward overspeed brake assembly 33, wherein when cable 1 moves in a forward direction for overspeed, forward overspeed trigger assembly 32 drives forward overspeed brake assembly 33 to clamp cable 1 for braking;

the reverse emergency brake mechanism 4 is shown in fig. 4 and 6 and comprises a reverse emergency mounting bracket 41, a reverse emergency trigger assembly 42 and a reverse emergency brake assembly 43, wherein when the cable 1 moves reversely, the reverse emergency trigger assembly 42 drives the reverse emergency brake assembly 43 to clamp the cable 1 for braking.

Protective covers are arranged outside the forward overspeed trigger assembly 32, the forward overspeed brake assembly 33, the reverse emergency trigger assembly 42 and the reverse emergency brake assembly 43 and are used for protecting the internal structures of the protective covers.

Forward overspeed mounting bracket 31 and reverse emergency mounting bracket 41 are identical in construction, as are forward overspeed brake assembly 33 and reverse emergency brake assembly 43, i.e., forward overspeed brake mechanism 3 differs from reverse emergency brake mechanism 4 only in that: forward overspeed trigger assembly 32 is of a different construction than reverse emergency trigger assembly 42. The present embodiment is described with respect to the structure of forward overspeed mounting bracket 31 and forward overspeed brake assembly 33 in forward overspeed brake mechanism 3, and the structure of reverse emergency mounting bracket 41 and reverse emergency brake assembly 43 in reverse emergency brake mechanism 4 will not be described again.

The top of the forward overspeed mounting bracket 31, which is used as a mounting component for each sub-component and part in the forward overspeed braking mechanism 3, is hinged on the main frame 201 of the pay-off tackle main body 2 through a pin shaft.

The structure of the forward overspeed brake assembly 33 is shown in fig. 9-11, and includes a buckle 331, a hook 332, a connecting seat 333, a brake spring 336, two brake shoes 334 and two brake sliding seats 335, wherein the brake spring 336 and the hook 332 are respectively fixed on two sides of the connecting seat 333 along a direction parallel to the movement direction of the cable 1, the two brake shoes 334 are respectively connected on two sides of the connecting seat 333 in a sliding manner along a direction perpendicular to the movement direction of the cable 1, the two brake shoes 334 are respectively located on two sides of the cable 1, the buckle 331 is connected with the hook 332 in a buckling manner, the buckle 331 is rotatably connected to the forward overspeed mounting bracket 31, a rigid support 3312 and an elastic support 3311 are respectively installed below two ends of the buckle 331, and the rigid support 3312 is located on a side of the elastic support 3311 away from the connecting seat 333.

As shown in fig. 11, the distance between the brake sliding seat 335 and the cable 1 is gradually decreased along a direction away from the connection seat 333, an inclined surface is provided on the brake pad 334, the brake pad 334 is slidably connected with the brake sliding seat 335 through the inclined surface, and a plurality of rotating rollers contacting the inclined surface of the brake pad 334 are provided on the brake sliding seat 335 side by side, which is more beneficial to smooth sliding of the brake pad 334 on the brake sliding seat 335.

During implementation, in order to guarantee the clamping effect of the two brake pads 334 on the cable 1, the opposite surfaces of the two brake pads 334 are all parallel to the movement direction of the cable 1, and an elastic clamping layer is fixed on the opposite surfaces of the two brake pads 334 and is in close contact with the surface of the cable 1, so that the clamping force of the brake pads 334 on the cable 1 can be guaranteed while the cable 1 is protected from being damaged by friction.

The braking principle of forward overspeed brake assembly 33 is as follows: when the hasp 331 rotates, the hasp 331 is separated from the hook 332, the connecting base 333 moves along the movement direction of the cable 1 under the pulling of the braking spring 336, the two braking blocks 334 are driven to respectively slide on the two braking sliding bases 335, the two braking blocks 334 approach to each other until contacting with the cable 1 and forming preliminary clamping, after the preliminary clamping, a certain friction force is generated between the braking blocks 334 and the cable 1, and the braking blocks 334 continuously move for a distance together with the cable 1 by virtue of the friction force and further clamp the cable 1 until the friction force is large enough to brake the cable 1.

The structure of the forward overspeed triggering assembly 32 is shown in fig. 5, 7 and 8, and includes a forward overspeed triggering supporting small roller 322 rolling synchronously when moving along with the cable 1 and a forward overspeed triggering flywheel 321 connected with the forward overspeed triggering supporting small roller 322 through a synchronous belt and a synchronous pulley, wherein a centrifugal device 3210 is arranged on the forward overspeed triggering flywheel 321, one or more centrifugal devices 3210 are provided, and in this embodiment, two centrifugal devices 3210 are provided. The centrifugal device 3210 includes a centrifugal channel opened on the wheel surface of the forward overspeed trigger flywheel 321, and a centrifugal block 32101 and a return spring 32102 disposed in the centrifugal channel.

The triggering principle of the forward overspeed trigger assembly 32 is: when the cable 1 moves in an overspeed manner, the rotating speed of the small forward trigger supporting roller 322 which synchronously rolls along with the movement of the cable 1 is increased to drive the rotating speed of the forward overspeed trigger flywheel 321 to be increased, the centrifugal force borne by the centrifugal block 32101 on the forward overspeed trigger flywheel 321 overcomes the elastic force of the return spring 32102 to move towards the outer end of the centrifugal channel, and after the centrifugal block 32101 is abutted against the bottom of one end of the buckle 331, the centrifugal block 32101 drives the buckle 331 to rotate together along with the rotation of the forward overspeed trigger flywheel 321, so that the forward overspeed trigger is realized.

The reverse emergency triggering assembly 42 is structured as shown in fig. 6 and 12, and includes a reverse emergency supporting small roller 422 rolling synchronously when moving along with the cable 1, and a reverse emergency triggering flywheel 421 connected with the reverse emergency supporting small roller 422 through a synchronous belt and a synchronous pulley, wherein a unidirectional helical tooth 4210 is arranged on the outer circumference of the reverse emergency triggering flywheel 421, and the unidirectional helical tooth 4210 on the reverse emergency triggering flywheel 421 is engaged with one end of the buckle 331.

The triggering principle of the reverse emergency triggering component 42 is as follows: when the cable 1 moves forward, the reverse emergency trigger flywheel 421 rotates forward, the front end of the buckle 331 in the reverse emergency brake component 43 passes over the inclined plane of the unidirectional inclined tooth 4210, and the reverse emergency trigger flywheel 421 cannot trigger and push the buckle 331; when the cable 1 moves reversely, the reverse emergency trigger flywheel 421 rotates reversely, the front end of the buckle 331 in the reverse emergency brake assembly 43 is embedded into the space between the adjacent unidirectional helical teeth 4210 of the reverse emergency trigger flywheel 421 under the action of the elastic support body 3311 below the buckle 331, and the buckle 331 is driven to rotate together with the reverse rotation of the emergency trigger flywheel 421, so that the reverse emergency trigger is realized.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A two-way mechanical brake payoff tackle, comprising:

a paying-off pulley body;

the positive overspeed braking mechanism is arranged on one side of the pay-off tackle main body along the movement direction of a cable and comprises a positive overspeed mounting bracket, a positive overspeed triggering assembly and a positive overspeed braking assembly, wherein when the cable moves in the positive direction and exceeds the speed limit, the positive overspeed triggering assembly drives the positive overspeed braking assembly to clamp the cable to realize braking;

the reverse emergency braking mechanism is arranged on the other side of the paying-off tackle main body along the movement direction of the cable and comprises a reverse emergency mounting bracket, a reverse emergency triggering assembly and a reverse emergency braking assembly, and when the cable moves reversely, the reverse emergency triggering assembly drives the reverse emergency braking assembly to clamp the cable to realize braking.

2. The two-way mechanical brake paying-off tackle as claimed in claim 1, wherein the forward overspeed brake assembly and the reverse emergency brake assembly each comprise a hasp, a hook, a brake spring, a connecting seat, two brake blocks and two brake sliding seats, the brake spring and the hook are respectively fixed on two sides of the connecting seat along a direction parallel to the movement direction of the cable, the two brake blocks are respectively located on two sides of the cable, the hasp is connected with the hook in a buckling manner, when the hasp rotates, the hasp is separated from the hook in a buckling manner, the connecting seat moves along a direction parallel to the movement direction of the cable under the pulling of the brake spring, the two brake blocks can be driven to respectively slide on the two brake sliding seats, and the sliding of the brake blocks on the brake sliding seats has a displacement component perpendicular to the movement direction of the cable.

3. The two-way mechanical brake pay-off tackle as claimed in claim 2, wherein the forward overspeed trigger assembly comprises a forward overspeed trigger supporting small roller that rolls synchronously with the movement of the cable and a forward overspeed trigger flywheel that is connected with the forward overspeed trigger supporting small roller through a synchronous belt and a synchronous pulley, the forward overspeed trigger flywheel is provided with a centrifugal device, the centrifugal device comprises a centrifugal channel arranged on the wheel surface of the forward overspeed trigger flywheel and a centrifugal block and a return spring arranged in the centrifugal channel, and the centrifugal block abuts against the bottom of one end of the buckle to drive the buckle to rotate.

4. A bi-directional mechanical brake payoff tackle as claimed in claim 3, wherein said centrifugal means is two in number.

5. The two-way mechanical brake pay-off tackle as claimed in claim 2, wherein the reverse emergency trigger assembly comprises a small reverse emergency support roller capable of synchronously rolling along with the movement of the cable, and a reverse emergency trigger flywheel connected to the small reverse emergency support roller through a synchronous belt and a synchronous pulley, the reverse emergency trigger flywheel is provided with a unidirectional helical tooth on an outer circumference thereof, and the unidirectional helical tooth on the reverse emergency trigger flywheel is engaged with one end of the buckle.

6. The cable tackle as claimed in claim 2, wherein the distance between the brake slider and the cable is gradually decreased in a direction away from the hasp, the brake block is provided with a slope, the brake block is slidably connected with the brake slider through the slope, and the opposite surfaces of the two brake blocks are parallel to the movement direction of the cable.

7. A two-way mechanical brake payoff tackle as claimed in claim 6, wherein resilient clamping layers are secured to opposite faces of said brake shoes.

8. A two-way mechanical brake line tackle as claimed in claim 6, wherein the brake shoes are provided with a plurality of rollers that contact the inclined surfaces of the brake shoes.

9. The bi-directional mechanical brake line tackle as claimed in claim 1, wherein the forward overspeed triggering assembly, the forward overspeed braking assembly, the reverse emergency triggering assembly and the reverse emergency braking assembly are each externally provided with a protective cover.

10. A two-way mechanical brake payoff tackle as claimed in claim 1, wherein said forward overspeed mounting bracket and reverse emergency mounting bracket are both hinged to the top of said payoff tackle body.