CN202125546U

CN202125546U - Friction type coupler

Info

Publication number: CN202125546U
Application number: CN2011202499069U
Authority: CN
Inventors: 王友山
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-06
Filing date: 2011-07-06
Publication date: 2012-01-25
Anticipated expiration: 2021-07-06

Abstract

The utility model discloses a friction type coupler, which comprises a main transmission shaft (3), a friction disk (7), a clutch shell (5), an internal spline connecting sleeve (17), and a device for axially locating the friction disk (7) and applying an axial spring pressure to the friction disk (7), wherein during start, a friction block (25) has contact and friction with a radial internal surface of the clutch shell (5) by effect of a centrifugal force to control the friction disk (7) to have friction with friction rings (6, 1) on the internal lateral surface of the clutch shell so as to implement power transmission; during overload, the friction disk and the friction rings have friction with each other to cause temperature increment; the liquid in a closed cavity (12) of the friction disk is expanded due to temperature increment to force the friction disk to be separated from the friction rings so as to implement separation of a motor and the load. The friction type coupler is characterized by having light weight, stable junction, sensitive power transmission and large contact friction force, being capable of controlling the surface temperature of the coupler and being effective for a long time in use, etc.; therefore, the friction type coupler completely eliminates the potential safety hazard about over-high temperature, and is particularly suitable for being used in places with high demand in temperature safety.

Description

Friction coupler

Technical field

The utility model relates to a kind of coupler, specifically, relates to a kind of friction coupler.

Background technique

Electromechanical equipments such as mining scraper plate machine, Belt Conveyors engage when starting with speed reducer for making motor automatically, when overload, automatically terminate connection, mainly adopt fluid clutch or centrifugal friction clutch.

Fluid clutch is to charge into liquid medium in clutch inner chamber part, and when the motor drives clutch rotated, the turbine impeller blade of liquid medium impact clutch under action of centrifugal force rotated thereby drive output shaft.Fluid clutch is because generally with oil or the water transmission medium as power, easy generation high temperature in service causes that oil or water expand, boost, and causes being arranged on the fusible plug fusing on the clutch outer member; Oil, water are revealed; Finally cause shutting down, influence proper functioning, so working life is shorter.

Centrifugal friction clutch is to rely on centrifugal with the frictional engagement of clutch disk or separate and realize clutch, and the clutch that uses this structure is owing to this body weight, brake pad contacted with clutch disk moment, so is prone to cause output shaft to rupture because of impact force is excessive; In addition, this blast burning-point of invar is 305 ℃, and country's peace mark is done regulation; The clutch surface temperature of using under the coal mine must not surpass 200 ± 2 ℃, and when existing centrifugal friction clutch overloaded, surface temperature will be above 400 ℃; For preventing temperature exceeding standard, all adopt disposable measure, in case promptly the clutch surface temperature above 200 ℃; Come off after the brake pad efflorescence immediately, cause clutch disposablely to use.For above-mentioned reasons, centrifugal friction clutch is also shorter working life.

On August 18th, 2004, the Chinese utility model patent specification of bulletin disclosed a kind of " friction clutcch " (application number 02241064.3 that the applicant applies for; Notification number CN2634180Y); This friction clutcch; Comprise main drive shaft, land, clutch hoop, output shaft, the internal spline of said land cooperates with the helical gear of main drive shaft one end, and the excircle inclined-plane of land coincide with the friction ring surface that is fixed on the clutch hoop inner side surface; Land is through the location of the pressure spring between two external block plates, interior block plate and the outer block plate and the interior block plate of its both sides.When electric motor starting moves; Helical gear on the main drive shaft overcomes the spring force of pressure spring between interior block plate and the outer block plate to the axial thrust load of land internal spline effect; The promotion land moves axially; Make of the friction ring contact friction of the inclined-plane of land excircle, drive the clutch hoop and rotate, realize transmission of power with the output shaft that is fixedly connected on the clutch hoop with clutch hoop inner side surface.This friction clutcch is compared with above-mentioned existing centrifugal friction clutch, because of being the Mohs friction between the rubbing surface, and has in light weight, advantages such as frictional contact surface is big, contact impact is little, long service life.For making the helical gear on the main drive shaft apply axial force more quickly to land; This friction clutcch evenly is provided with fan blade in the outer circumferential periphery of land; So that when main drive shaft rotated, the rotational resistance of fan blade made land rotational hysteresis in main drive shaft.But find in using; The rotational resistance deficiency of fan blade significantly lags behind main drive shaft so that land rotates; Land and main drive shaft cause the friction ring contact friction force deficiency of the inclined-plane and the clutch hoop inner side surface of land excircle, and transmission of power are sensitive inadequately near synchronous idle during startup.In addition, this friction clutcch, for preventing temperature exceeding standard, employing also be disposable measure.

Summary of the invention

The purpose of the utility model is to provide that a kind of transmission of power is sensitive, contact friction force is big, may command coupler surface temperature, can long-acting use friction coupler.

Be to realize that above-mentioned purpose, the utility model friction coupler comprise main drive shaft, friction disk, clutch shell, internal spline connecting sleeve, make the friction disk axially locating and receive the device of axle spring pressure; The interior helical teeth of friction disk cooperates with the helical gear of main drive shaft one end; The excircle of friction disk is a double inclined plane; Friction ring is fixed on the inner side surface of clutch shell; The oblique angle, left and right inclined-plane of friction disk equates that with oblique angle, left and right friction ring surface the internal spline connecting sleeve is connected through bolt with said clutch shell respectively; In friction disk, be provided with airtight cavity, the liquid that burning-point is higher than 300 ℃ is housed in the cavity near bibeveled position; Radial side at friction disk is uniformly distributed with at least two brake pads, and this brake pad is provided with boss at the circumferential two ends of a side that contacts with friction disk, and lever dolly one end is fixed on the radial side of friction disk, and brake pad is movably arranged between two lever dollies; Lever is hinged on the lever dolly, on the boss that the end is hinged, the other end is pressed on brake pad of an end of lever through mandrel and adjacent another lever; Radially be provided with the plunger mat with the brake pad equal number at friction disk; Hinged axle center and the axis of rotation of friction disk of the axis of plunger mat through adjacent two levers is installed in the plunger mat, the mandrel of the other end and hinged adjacent two levers is hinged plunger rod one end liquid sealing.

Motor is in case start; Brake pad under action of centrifugal force promptly with the contact friction of clutch shell inner radial surface; Make the rotational velocity of friction disk lag behind the rotational velocity of main drive shaft; Friction disk axially motion under the promotion of helical gear axial thrust load thereupon, the friction ring friction of the excircle inclined-plane of friction disk and clutch shell inner side surface realizes transmission of power; Therefore, the utility model and application number are that 02241064.3 " friction clutcch " compared, and have transmission of power sensitivity, characteristics that contact friction force is big.In case overload in service, the friction ring temperature arrising caused by friction of the excircle inclined-plane of friction disk and clutch shell inner side surface makes the expansion that heats up immediately of liquid in the friction disk closed cavity; Under the effect of plunger rod and lever; Brake pad separates with the clutch shell, friction disk thereupon with the main drive shaft synchronous idle, lose axial thrust load, under the effect of pressure spring thrust; The excircle inclined-plane of friction disk separates with the friction ring of clutch shell inner side surface, and the realization motor separates with load.Because the overload separation process, not being higher than 150 ℃ in the coupler surface temperature can accomplish rapidly, is lower than the temperature standard that country's peace mark is done regulation, and coupler need not disposable use; In addition, because separating rate is fast, wear phenomenon can not appear between friction disk and the friction ring; Simultaneously; This coupler all can use when motor positive and inverse, and therefore, the utility model and application number are that 02241064.3 " friction clutcch " compared with existing centrifugal friction clutch; Have can long-acting use advantage, thoroughly eliminated the overtemperature potential safety hazard simultaneously.

Description of drawings

Fig. 1 is the axial sectional view of the utility model friction coupler.

Fig. 2 is the radial cross-section of the utility model friction coupler shown in Figure 1.

Fig. 3 is the partial enlarged view at A place among Fig. 1, has looked out the structure of heat radiation valve.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described.

The following stated " existing friction clutcch " is meant that application number that background technique is partly described is 02241064.3 " friction clutcch ".

Like Fig. 1, shown in Figure 2, the utility model friction coupler comprises main drive shaft 3, friction disk 7, clutch shell 5, internal spline connecting sleeve 17, make friction disk 7 axially locating and receive the device of axle spring pressure; The interior helical teeth 2 of friction disk 7 cooperates with the helical gear 4 of main drive shaft 3 one ends; The excircle of friction disk 7 is a double inclined plane; Friction ring 6,11 usefulness sunk screws or be fixed on the inner side surface of clutch shell 5 with the bonding mode of high-temperature plastic; The oblique angle, left and right inclined-plane of friction disk 7 equates (among Fig. 1, main drive shaft one side is a left side, down together) respectively with left and right friction ring 6,11 surperficial oblique angles; Internal spline connecting sleeve 17 is fixedly connected through bolt 18 with said clutch shell 5; Be to guarantee the coaxality of internal spline connecting sleeve 17 and main drive shaft 3, Spielpassung one wear-resisting copper sheathing bearing 15 between the inner radial surface of the radially-outer surface of internal spline connecting sleeve 17 and main drive shaft 3.Above-mentioned mode of execution and existing friction clutcch are basic identical; Its effect is to make friction disk in rotational hysteresis during in main drive shaft; Helical gear on the main drive shaft applies axial thrust load to helical teeth in the friction disk; Promote the friction disk axial motion, thereby make of the friction ring contact friction of the inclined-plane of friction disk excircle, realize transmission of power with clutch shell inner side surface.

Friction disk and main drive shaft are near synchronous idle when avoiding starting; Cause friction disk can not move axially the generation of phenomenon; Like Fig. 1, shown in Figure 2, in friction disk 7, airtight cavity 12 is set near bibeveled position, the liquid that burning-point is higher than 300 ℃ is housed in the cavity 12; Radial side at friction disk 7 is uniformly distributed with at least two brake pads 25; This brake pad 25 is provided with boss at the circumferential two ends of a side that contacts with friction disk 7; Lever dolly 24 1 ends are fixed on the radial side of friction disk 7, and brake pad 25 is movably arranged between two lever dollies 24; Lever 22 is hinged on the lever dolly 24, and an end of lever 22 is hinged with the end of adjacent another lever through mandrel 23, the other end is pressed on the boss of brake pad 25; Radially be provided with the plunger mat 10 with brake pad 25 equal numbers at friction disk 7; Hinged axle center and the axis of rotation of friction disk 7 of the axis of plunger mat 10 through adjacent two levers 22 is installed in the plunger mat 10, the mandrel 23 hinged (this end also can offset with the intersection of adjacent two levers 22) of the other end and hinged adjacent two levers 22 plunger rod 9 one end liquid sealings.

For making friction disk 7 axially locating and receiving axle spring pressure; In the existing friction clutcch; Be oppositely arranged two interior block plates with outer block plate (being the left and right block plate of the utility model); In each block plate its mutually externally a side of block plate be uniformly distributed with outside the identical cylindrical body of block plate quantity, inside and outside pressure spring is installed between the block plate on the relative a pair of cylindrical body; Between interior block plate and land (being the friction disk of the utility model), be evenly distributed to few three steel balls, land can be rotated through the internal mutually block plate of steel ball.This technological scheme although also can be used for the utility model, has and manufactures complicated and pressure spring can relatively rotate the shortcoming of twisting because of friction disk and block plate.Be the shortcoming of avoiding this technological scheme to exist; As shown in Figure 1; The utility model is provided with left block plate 1, right block plate 13 at main drive shaft 3 right-hand members; Left side block plate 1 left end is made of one with main drive shaft with location of the boss on the main drive shaft or left block plate, and right block plate 13 right-hand members are located with the jump ring 14 that is stuck on the main drive shaft; Friction disk is uniformly distributed with at least three through holes on friction disk 7 disc between left block plate 1 and right block plate 13, a hollow conduit 16 is installed in each disc through hole; Guide pillar 20 is cylinders of a band boss, and the styletable of guide pillar 20 assigns in the hollow conduit 16, the end of boss end has the groove that steel ball is installed, and the degree of depth of groove is less than the diameter of institute's dress steel ball 19, can be against on the block plate and rolls so that be contained in steel ball 19 in the groove; Pressure spring 21 is sleeved on the hollow conduit 16, and an end is against on friction disk 7 disc, and the other end is against on the boss of guide pillar 20.

The long-time running meeting makes friction ring produce certain wearing and tearing.For this reason, like Fig. 1, shown in Figure 3, at least one heat radiation valve 8 is installed on clutch shell 5 excircles, the axial hole 28 of this heat radiation valve 8 communicates with clutch shell 5 inner chambers; Through hole 28 is laid steel ball 29, away from closing shell inner chamber end the plug 26 of tape spool to through hole is being housed at nearly clutch shell inner chamber end, and pressure spring 27 1 ends are against on the steel ball 29, the other end is against on the plug 26; The diameter of said through hole 28 nearly clutch shell inner chamber ends is less than the diameter of steel ball 29.After heat radiation valve 8 was installed, during coupler operation rotation, steel ball 29 made spring 27 compressions under action of centrifugal force, open through hole 28, discharges the dirt that wearing and tearing produce; During shutdown, steel ball 29 seals through hole 28 automatically under the effect of pressure spring 27, keeps the cleaning of coupler body inner chamber.Existing friction clutcch is directly offered through hole on clutch shell excircle, in through hole, place pressure spring and steel ball, and the mode of the inner dirt of this discharge clutch shell also can be used in the utility model.

(motor just changes, reverses, and the utility model all can use, and motor steering is different, can cause friction disk to move axially direction difference, friction disk and move to the left or to the right, and working principle is identical with process.For being illustrated more clearly in the utility model; This paragragh moves right with friction disk and describes) when starting; The empty load of motor operation; The circumferential component of helical teeth 2 active forces rotates friction disk 7 in 4 pairs of friction disks of helical gear on the main drive shaft; Be movably arranged on the brake pad 25 radially outward motion under action of centrifugal force on the friction disk radial side, after the inner radial surface contact friction of the radially-outer surface of brake pad 25 and clutch shell 5, the rotational velocity of friction disk 7 lags behind the rotational velocity of main drive shaft 3; The axial thrust load of helical teeth 2 active forces overcomes the spring force of pressure spring 21 between friction disk 7 and the right block plate 13 in 4 pairs of friction disks of helical gear on the main drive shaft; Promote friction disk 7 and move right, make of right friction ring 11 contact frictions of the right tilted surface of friction disk 7 excircles, drive clutch shell 5 and rotate with the internal spline connecting sleeve 17 that is fixedly connected on the clutch shell with clutch shell inner side surface; Rotate thereby drive the driven shaft (being the input shaft of speed reducer) that is installed in the internal spline connecting sleeve 17, realize transmission of power.During overload; The right tilted surface of friction disk 7 excircles slippage occurs with the right friction ring 11 of clutch shell inner side surface, and temperature arrising caused by friction causes the expansion of liquids in the friction disk closed cavity 12; Force the radially outwards motion of plunger rod 9 on the friction disk; Promote radially outwards to move with plunger rod 9 hinged lever 22 1 ends, lever 22 the other ends promote the radially inwardly motion of boss of brake pad 25, and brake pad 25 is separated with clutch shell 5.Brake pad 25 is with after clutch shell 5 separates; Friction disk 7 and main drive shaft 3 synchronous idles; The axial thrust load of helical teeth 2 active forces is less than the spring force of pressure spring 21 between friction disk 7 and the right block plate 13 in 4 pairs of friction disks of helical gear on the main drive shaft; Under the effect of spring thrust, the inclined-plane of friction disk 7 excircles was opened with the right friction ring of clutch shell inner side surface in 11 minutes, and the realization motor separates with load.After waiting to remove the overload fault, the fluid temperature in the closed cavity 12 descends, and repeats above-mentioned brake pad and clutch shell joint automatically and touches the friction ring contact friction process of the inclined-plane of friction → friction disk excircle with clutch shell inner side surface, and coupler runs well.

Motor just changes, reverses and all can use, and has following effect: when the friction ring of a side weares and teares because of long-term use to some extent, can use the friction ring of opposite side, and needn't change coupler; In addition, when being used for electromechanical equipment coupling such as scraper plate machine, Belt Conveyors, as the overload phenomenon occurring, can be through letting the motor counter-rotating that scraper plate or conveyor belt are retreated, the continued of fixing a breakdown operation.

The control of coupler or clutch surface temperature is that those skilled in the art want to solve and insurmountable problem always, exactly because surface temperature during uncontrollable overload has the disposable use of just having to of coupler or clutch now; In case coupler or clutch surface temperature surpass 200 ℃, promptly to scrap voluntarily, not only increase equipment input, and replacing coupler or clutch also can cause to produce and pause.According to the technological scheme of the utility model, the claimant produces the model machine test of maintaining secrecy, and the result finds: during startup, the coupler transmission of power is sensitive, contact friction force is big; During overload, the coupler surface temperature is not higher than 150 ℃ and can separates automatically immediately.

The utility model friction coupler is the improvement to existing friction clutcch, because of having kept original Mohs friction structure, and inherited that the frictional contact surface that existing friction clutcch had is big, advantage such as smooth engagement, contact impact are little.Compare with existing friction clutcch, the utility model friction coupler weight does not have to change basically, is example with the rated power that transmits 40Kw, and existing this body weight of friction clutcch 35Kg is transmit same this body weight of power centrifugal friction clutch half the; The utility model friction coupler is compared with existing friction clutcch; Friction disk is by the solid hollow-core construction that changes into; The weight metal that the liquid weight that increases in the hollow-core construction reduces less than friction disk; The brake pad that increases is the compound friction flame retardant material, about only about 120 grams of each brake pad, make the utility model when using 4 brake pads than this friction clutcch light 0.5Kg still.

Claims

1. friction coupler comprises main drive shaft (3), friction disk (7), clutch shell (5), internal spline connecting sleeve (17), makes friction disk (7) axially locating and receives the device of axle spring pressure; The interior helical teeth (2) of friction disk (7) cooperates with the helical gear (4) of main drive shaft (3) one ends; The excircle of friction disk (7) is a double inclined plane; Friction ring (6,11) is fixed on the inner side surface of clutch shell (5), and the oblique angle, left and right inclined-plane of friction disk (7) equates with the surperficial oblique angle of left and right friction ring (6,11) respectively; Internal spline connecting sleeve (17) is fixedly connected through bolt (18) with said clutch shell (5), it is characterized in that:

In friction disk (7), be provided with airtight cavity (12) near bibeveled position, cavity is equipped with the liquid that burning-point is higher than 300 ℃ in (12); Radial side at friction disk (7) is uniformly distributed with at least two brake pads (25); This brake pad (25) is provided with boss at the circumferential two ends of a side that contacts with friction disk (7); Lever dolly (24) one ends are fixed on the radial side of friction disk (7), and brake pad (25) is movably arranged between two lever dollies (24); Lever (22) is hinged on the lever dolly (24), and an end of lever (22) is hinged with the end of adjacent another lever through mandrel (23), the other end is pressed on the boss of brake pad (25); Radially be provided with the plunger mat (10) with brake pad (25) equal number at friction disk (7); Hinged axle center and the axis of rotation of friction disk (7) of the axis of plunger mat (10) through adjacent two levers (22) is installed in the plunger mat (10), the mandrel (23) of the other end and hinged adjacent two levers (22) is hinged plunger rod (9) one end liquid sealings.

2. friction coupler according to claim 1; It is characterized in that: the said device that makes friction disk (7) axially locating and receive axle spring pressure; Be to be provided with left block plate (1), right block plate (13) at main drive shaft (3) right-hand member; Left side block plate (1) left end is with the location of the boss on the main drive shaft, and right block plate (13) right-hand member is with jump ring (14) location that is stuck on the main drive shaft; Friction disk is positioned between left block plate (1) and the right block plate (13), on friction disk (7) disc, is uniformly distributed with at least three through holes, and a hollow conduit (16) is installed in each disc through hole; Guide pillar (20) is the cylinder of a band boss, and the styletable of guide pillar (20) assigns in the hollow conduit (16), the end of boss end has the groove that steel ball is installed, and the degree of depth of groove is less than the diameter of institute's dress steel ball (19); Pressure spring (21) is sleeved on the hollow conduit (16), and an end is against on friction disk (7) disc, and the other end is against on the boss of guide pillar (20).

3. friction coupler according to claim 1 and 2 is characterized in that: on said clutch shell (5) excircle, be provided with at least one heat radiation valve (8), the axial hole (28) of this heat radiation valve (8) communicates with clutch shell (5) inner chamber; Through hole (28) is laid steel ball (29), away from closing shell inner chamber end the plug (26) of tape spool to through hole is being housed at nearly clutch shell inner chamber end, and pressure spring (27) one ends are against on the steel ball (29), the other end is against on the plug (26); The diameter of the nearly clutch shell inner chamber end of said through hole (28) is less than the diameter of steel ball (29).