CN2252273Y

CN2252273Y - Centrifugal jaw unloading safety clutch

Info

Publication number: CN2252273Y
Application number: CN 96211636
Authority: CN
Inventors: 陈平安
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-05-08
Filing date: 1996-05-08
Publication date: 1997-04-16
Anticipated expiration: 2006-05-08

Abstract

The utility model discloses a centrifugal jaw unloading safety clutch which is used for mechanical driving devices, comprising a spline shaft sleeve, a driving wheel body, a bark seam shaft coupling, a centrifugal block, a housing, a transmission housing, a sliding internal tooth sheath, a driving jaw, a driven jaw, a push-pull rod, etc., wherein the driving wheel body can drive the centrifugal block, the housing, the transmission housing and the spline shaft sleeve to rotate; the driving jaw and the driven jaw are engaged by the trapezoidal teeth; the push-pull bar is provided with a work positioning slot and a neutral positioning slot. The utility model has the advantages of smooth start which can drive a plurality of motors to run symmetrically, safe unloading, simple structure and large output power.

Description

Centrifugal tooth embedding unloading safety clutch

The utility model relates to mechanical transmission, especially relates to a kind of centrifugal tooth embedding unloading safety clutch.

Centrifugal clutch and jaw clutch generally all are safety clutches at present, and centrifugal clutch is centrifugal and shell slide relative overlong time when machine transships, and heating causes the variation of frictional behavior and the reduction of friction material intensity easily; Though jaw clutch has control machine overload function, does not possess safe offloading functions, can not the high speed soft start, can produce impact force during overload, can only be used for the not high transmission system of rotating speed.

The purpose of this utility model be to provide a kind of high-speed starting steadily, can make the multiple electric motors balanced running, have the centrifugal tooth embedding unloading safety clutch of safe offloading functions.

The purpose of this utility model is achieved in that the utility model comprises the floral axis cover, the active wheel body, the bark pocket coupling, front cover, shell, bearing support, bearing, oil sealing etc., the active wheel body, bearing, oil-sealing sleeve is on hub splines, the bark pocket coupling is assemblied on the active wheel body, feature is centrifugal and is installed in by front cover, shell, bearing support, initiatively in the centrifugal chamber that wheel body constitutes, drive shell body and function screw is fixed on bearing support and the shell, friction ring, the dish spring, copper sheathing, from dynamic interlocking teeth, adjusting nut, bearing, oil sealing, rear end cover is enclosed within on the hub splines successively, the rear end cover-use screw is fixed on the transmission housing, be connected with flat key with hub splines from dynamic interlocking teeth, be meshed with the trapezoidal tooth of active jaw end face from the trapezoidal tooth of dynamic interlocking teeth end face, the dish spring withstands the left side of active jaw, copper sheathing then is assemblied on the endoporus of active jaw, tooth on the active jaw external diameter is meshed with the internal tooth of slip internal tooth casing, the external diameter of slip internal tooth casing is connected with flat key with the internal diameter of transmission housing, two T-slots have been processed on the right side of slip internal tooth casing, pull bar is assemblied on the circular hole of T-slot and transmission housing back, be processed with work locating slot and neutral gear locating slot on the pull bar, handle is fixed on the outer end of pull bar, afterbody upper end at the transmission housing is processed with positioning hole, steel ball, spring is successively placed in the positioning hole, screw in pressing spring with screw, steel ball drops in the work locating slot.

The utility model is because organically combining with jaw clutch centrifugal clutch, the soft start of energy high speed, starting steadily, improved starting performance, save electric energy, and can under the situation of machine overload, make it safe unloading, overcome former fluid coupling in use the down-hole during overload insurance fusible plug spray oily fire and cause gas explosion, the shortcoming that the serious threat downhole safety is produced can also be regulated the rotating speed deviation that multiple electric motors drives, and makes the load uniform distribution, and it is little to have boundary dimension, simple in structure, processing and assembling is convenient, output power is big, the advantage of high working efficiency, can be big at dust and condition that the coal mine explosion-proof performance requirement is high under work.

Fig. 1 is a half section structure principle chart of the present utility model.

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

Active wheel body 2 of the present utility model, oil sealing 3, bearing 4 are enclosed within on the hub splines 1, and oil sealing 3, bearing 4 are installed between hub splines 1 and the active wheel body 2.Bark pocket coupling 5 is assemblied on the active wheel body 2, and front cover 6, shell 8, bearing support 9, active wheel body 2 constitute centrifugal chambers, and centrifugal 7 is installed in the centrifugal chamber.Transmission housing 11 usefulness screws 12 are fixed on bearing support 9 and the shell 8, friction ring 19, dish spring 13, steel bushing 14, be enclosed within successively on the hub splines 1 from dynamic interlocking teeth 26, adjusting nut 29, bearing 30, oil sealing 31, rear end cover 27, rear end cover 27 usefulness screws 28 are fixed on the transmission housing 11.Be connected with hub splines 1 usefulness flat key from dynamic interlocking teeth 26, be meshed with the trapezoidal tooth of active jaw 16 end faces from the trapezoidal tooth of dynamic interlocking teeth 26 end faces, dish spring 13 withstands the left side of active jaw 16, by adjusting nut 29 can adjust dish spring 13 press to active jaw 16, from the compressive force of dynamic interlocking teeth 26.Tooth on active jaw 16 external diameters is meshed with the internal tooth of slip internal tooth casing 15, and the external diameter of slip internal tooth casing 15 and the internal diameter of transmission housing 11 are Spielpassung and are connected with flat key.The right side of slip internal tooth casing 15 is processed with two T-slots, pull bar 17 is installed in the circular hole 18 of the T-slot of slip internal tooth casing 15 right sides and transmission housing 11 back, on pull bar 17, be processed with neutral gear locating slot 19, work locating slot 24, handle 25 usefulness round pins are fixed on pull bar 17 outer ends, afterbody upper end at transmission housing 11 is processed with and circular hole 18 orthogonal positioning holes 22, steel ball 23, spring 21 are successively placed in the positioning hole 22, screw in pressing spring 21 in the positioning hole 22 with screw 20 at last, steel ball 23 drops in the locating slot 24.

When motor rotation, active wheel body 2 rotations by bark pocket coupling 5 input tape dynamic clutch, when reaching rated speed, centrifugal 7 internal surface that under action of centrifugal force, compresses shell 8, drive shell 8,

bearing support

9,11 rotations of transmission housing, because transmission housing 11 is connected for flat key with slip internal tooth casing 15, slip internal tooth casing 15 and active jaw 16 are connected for interior external tooth, active jaw 16, from dynamic interlocking teeth 26 is that the trapezoidal tooth of end face connects,, flat key formed a Transmitted chains from dynamic interlocking teeth 26 for being connected with hub splines 1, therefore transmission housing 11 drives slip internal tooth casing 15 successively, active jaw 16, from dynamic interlocking teeth 26, hub splines 1 rotation, hub splines 1 normally rotates by machine tools such as its internal spline drive retarders;

When mechanical load surpasses load rating, just producing from dynamic interlocking teeth 26 on the hub splines 1 braked, trapezoidal tooth by end face produces axial thrust load, make active jaw 16 move axially compact disc spring 13 left, when active jaw 16 moves axially above certain distance (two tooth embeddings still keep being meshed), tooth on active jaw 16 external diameters but breaks away from engagement with slip internal tooth casing 15, clutch begins unloaded lotus running, getting back to when dynamic interlocking teeth 26 is meshed the home position by the compressive force promotion active jaw 16 that dish spring 13 discharges, also promoting slip internal tooth casing 15 automatically moves axially to the right along the flat key on the transmission housing 11, pull bar 17 is also along with moving right, after the steel ball 23 of work in the locating slot 24 is by jack-up, fall into again in the neutral gear locating slot 19, block pull bar 17, whole process links up rapidly automatically, only needed for 2 seconds, make clutch really break away from engagement and carry out the unloaded lotus rotation in overload back, reach the purpose of safety unloading.As will resuming work, only need stop motor and clutch outer member and rotate, driving handle 25 by hand is moved to the left pull bar 17 then, slip internal tooth casing 15 also is moved to the left mesh again with active jaw 16 to get final product.

Claims

1, a kind of centrifugal tooth embedding unloading safety clutch, comprise hub splines (1), active wheel body (2), bark pocket coupling (5), front cover (6), shell (8), bearing support (9), oil sealing (3) and bearing (4), active wheel body (2), oil sealing (3), bearing (4) is enclosed within on the hub splines (1), bark pocket coupling (5) is assemblied on the active wheel body (2), it is characterized in that: centrifugal (7) are installed in by active wheel body (2), front cover (6), in the centrifugal chamber that shell (8) and bearing support (9) constitute, transmission housing (11) is fixed on bearing support (9) and the shell (8) with screw (12), friction ring (10), dish spring (13), copper sheathing (14), from dynamic interlocking teeth (26), adjusting nut (29), bearing (30), oil sealing (31), rear end cover (27) is enclosed within on the hub splines (1) successively, rear end cover (27) is fixed on the transmission housing (11) with screw (28), be connected for flat key with hub splines (1) from dynamic interlocking teeth (26), be meshed with the trapezoidal tooth of active jaw (16) end face from the trapezoidal tooth of dynamic interlocking teeth (26) end face, dish spring (13) withstands the left side of active jaw (16), copper sheathing (14) is assemblied on the endoporus of active jaw (16), tooth on active jaw (16) external diameter is meshed with the internal tooth of slip internal tooth casing (15), the external diameter of slip internal tooth casing (15) is connected with flat key with the internal diameter of transmission housing (11), be processed with two T-slots on the right side of slip internal tooth casing (15), pull bar (17) is assemblied on the circular hole (18) of T-slot and transmission housing (11) back, on pull bar (17), be processed with neutral gear locating slot (19) and work locating slot (24), handle (25) is fixed on the outer end of pull bar (17), afterbody upper end at transmission housing (11) is processed with positioning hole (22), steel ball (23), spring (21) is successively placed in the positioning hole (22), screw in pressing spring (21) with screw (20), steel ball (23) drops in the work locating slot (24).