CN2821276Y

CN2821276Y - Bistable commutator

Info

Publication number: CN2821276Y
Application number: CN 200520086647
Authority: CN
Inventors: 王雪霖
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-08-26
Filing date: 2005-08-26
Publication date: 2006-09-27
Anticipated expiration: 2015-08-26

Abstract

The utility model relates to a mechanical driving device, particularly a bistable commutator used for changing the direction of torque force. A friction plate clutch is additionally arranged on a gear commutator by the utility model, and simultaneously, the actions of a shifting yoke are controlled through a permanent-magnet operating mechanism to operate the operating mode of the clutch. Commutating actions are rapid and soft, running noise can be effectively reduced and the service life can be extended.

Description

A kind of bistable commutator

Technical field

The utility model relates to a kind of mechanical transmission, especially is used for changing the bistable commutator of the direction of torsion.

Background technique

Having in the existing mechanical device much is the torsion of rotation constantly need be changed direction to export later on, as the lifting of elevator, the actions such as divide-shut brake of high-tension power transmission and transformation equipment.Certainly, these actions have the mode of multiple realization now, as by changing the sense of rotation of drive motor, perhaps reach the purpose of change torsion direction by the reversing arrangement of shift fork, gear structure.But inertia was big when motor changed direction, and especially initial actuating is slow, can not meet the demands sometimes.For example, the divide-shut brake action request initial actuating of high-tension power transmission and transformation equipment is fast, and motor-driven slow Starting mode obviously can not meet the demands.Though the reversing arrangement of shift fork, gear structure can satisfy the fast requirement of toggle speed, the impact force in the time of owing to commutation between the gear is bigger, and noise is big, and it is not steady to commutate, and be affected working life.

Summary of the invention

The purpose of this utility model provides that a kind of simple and reasonable, commutating speed is fast, running steadily, the bistable commutator of long service life.

For achieving the above object, the utility model adopts following technological scheme:

A kind of bistable commutator described in the utility model comprises gear box casing, is installed in input shaft and output shaft in the housing, connect by engaging gear between input shaft and the output shaft, gear box casing also is equipped with jack shaft, have input driven gear and output driving gear on the jack shaft, the input driving gear that input driven gear and key are connected on the input shaft often meshes, and the output driving gear often meshes with the forward output gear that is sleeved on the output shaft; Go back key on the input shaft and connect input shaft gear, this shaftgear often meshes with the reverse output gear that is sleeved on the output shaft; Be set with slide block on the output shaft between reverse output gear and the forward output gear, connect shift fork on the slide block; Respectively fixedly mount a cover friction plate clutch on reverse output gear and the forward output gear.

Above-mentioned friction plate clutch comprises friction plate outer support frame, active friction plate, from movable friction plate, platen, spline housing, the spline housing key is installed on the output shaft, be installed on the spline housing by keyway from movable friction plate, active friction plate is installed on the friction plate outer support frame by keyway, platen is sleeved on the output shaft, is positioned at from the outside of movable friction plate and active friction plate.

The other end of shift fork connects the output shaft of permanent-magnet operating mechanism, be provided with mechanism's output shaft in the shell of this permanent-magnet operating mechanism, it is overhanging that mechanism's output shaft passes the end cap at shell two ends, be fixed with iron core on mechanism's output shaft, the arranged outside of iron core has permanent magnet, permanent magnet is fixedlyed connected with shell, and set of pulses coil respectively is set between the two ends of permanent magnet and the end cap.

After adopting technique scheme, bistable commutator described in the utility model has following advantage:

1), commutation action is fast, will brake earlier when having avoided motor commutation changes long defective of direction action cycle again.

2), commutation action is soft, avoided the collision of commutation process middle gear, help reducing running noise, increase the service life.

3), the action of permanent-magnet operating mechanism control shift fork has well from the locking ability, and has bi-stable function, neutral can not occur, this be general type commutator can not than.

Description of drawings

Fig. 1 is one of the present utility model and implements sharp structural representation;

Fig. 2 is the structure principle chart of clutch part.

Embodiment

As shown in Figure 1, bistable commutator described in the utility model comprises gear box casing 1, be installed in input shaft 2 in the housing 1 and output shaft 3, jack shaft 4, all be installed in abreast in the housing 1 by bearing, wherein the two ends of jack shaft 4 are installed in respectively on the two side of housing 1, input shaft 2 and output shaft 3 are installed in respectively on the two side of housing 1, in order to improve stability of structure, between input shaft 2 and output shaft 3, connect by support 8, certainly, support 8 also has bearings with the joint of this diaxon.Key connects input driving gear 21 and input shaft gear 22 on the input shaft 2, be set with forward output gear 31 and reverse output gear 32, slide block 5 on the output shaft 3, forward output gear 31 and reverse output gear 32 can freely rotate on output shaft 3, and slide block 5 can endwisely slip on output shaft 3.Key connection input driven gear 41 and output driving gear 42 on the jack shaft 4, the input driving gear 21 on input driven gear 41 and the input shaft 2 often meshes, and the forward output gear 31 on output driving gear 42 output shafts 3 often meshes; Respectively fixedly mount a cover friction plate clutch 6 on reverse output gear 32 and the forward output gear 31, lay respectively at the both sides of slide block 5.Connect shift fork 77 on the slide block 5, the stage casing of shift fork 77 is installed on the strong point, the other end connects the output shaft of permanent-magnet operating mechanism 7, be provided with mechanism's output shaft 72 in the shell 71 of this permanent-magnet operating mechanism, it is overhanging that mechanism's output shaft 72 passes the end cap 76 at shell 71 two ends, be fixed with iron core 73 on mechanism's output shaft 72, the arranged outside of iron core 73 has permanent magnet 74, permanent magnet 74 is fixedlyed connected with shell 71, between the two ends of permanent magnet 74 and the end cap 76 set of pulses coil 75 is set respectively, is connected with control circuit.The working principle of permanent-magnet operating mechanism is as follows: add impulsive current for two pulsed coils 75, impulsive current produces induction field in pulsed coil 75, this induction field part is in order to offset the magnetic field that permanent magnet 74 produces, another part acts on iron core 73, produce suction, iron core 73 is moved, and finally under electromagnetic force and permanent magnet attraction force double action, be adsorbed on the side end cap 76.When iron core 73 moves, drive the shift fork execution that is connected on mechanism's output shaft 2.After the current vanishes in the pulsed coil 75, the magnetic field that impulsive current produces also disappears thereupon, and under the action of a magnetic field that permanent magnet 74 produces, iron core 73 still is attracted on the end cap 76, and permanent-magnet operating mechanism keeps original working state.When needs change working state, promptly when the needs shift fork moves, only need in pulsed coil 75, add rightabout impulsive current, mechanism's output shaft 72 is oppositely moved, iron core 73 is adsorbed on the opposite side end cap 76, realizes the transformation of working state, and keeps stable.

As shown in Figure 2, friction plate clutch 6 comprises friction plate outer support frame 61, active friction plate 62, from movable friction plate 63, platen 64, spline housing 65, spline housing 65 keys are installed on the output shaft 3, be installed on the spline housing 65 by keyway from movable friction plate 63, active friction plate 62 is installed on the friction plate outer support frame 61 by keyway, platen 64 is sleeved on the output shaft 3, is positioned at from the outside of movable friction plate 63 and active friction plate 62.Friction plate clutch 6 is fixedly mounted on the output shaft gear by friction plate outer support frame 61.This clutch also can adopt multi-plate friction clutch, multi-disc active friction plate 62 and arranged in a crossed manner from movable friction plate 63.

During this commutator work, the impulsive current of input different direction just can produce the electromagnetic force of different direction in pulsed coil 75, this electromagnetic force and permanent magnet results of interaction are done axial moving with regard to pushing mechanism output shaft 72, pulling shift fork when mechanism's output shaft 72 moves slidably reciprocates on output shaft 3 thereby drive slide block 5.In Fig. 1, when slide block 5 slides into the left side, compress with the active friction plate 62 of left side clutch with from movable friction plate 63 by platen 64, the power of input shaft 2 is by input driving gear 21, input driven gear 41, jack shaft 4, output driving gear 42, forward output gear 31, friction plate outer support frame 61, active friction plate 62, from movable friction plate 63, spline housing 65, be delivered to output shaft 3, drive output shaft 3 rotations, this moment, output shaft 3 was identical with the sense of rotation of input shaft 2; When needs change the sense of rotation of output shaft 3, if in pulsed coil 75 the opposite impulsive current of input, slide block 5 slides into the right side, and the clutch friction plate on right side is compressed, the clutch in left side unclamps naturally.Though input driving gear 21 can also drive jack shaft 4 rotations, forward output gear 31 dallies on output shaft 3.This moment, the power of input shaft 2 was by input shaft gear 22 and reverse output gear 32, friction plate outer support frame 61, active friction plate 62, from movable friction plate 63, spline housing 65, was delivered to output shaft 3, drove output shaft 3 rotations.At this moment output shaft 3 is opposite with the sense of rotation of input shaft 2.

Claims

1, a kind of bistable commutator, comprise gear box casing (1), be installed in input shaft (2) and output shaft (3) in the housing (1), connect by engaging gear between input shaft (2) and the output shaft (3), it is characterized in that: gear box casing (1) also is equipped with jack shaft (4), have input driven gear (41) and output driving gear (42) on the jack shaft (4), input driven gear (41) often meshes with the input driving gear (21) that key is connected on the input shaft (2), output driving gear (42) and normal engagement of forward output gear (31) that is sleeved on the output shaft (3); Go back key on the input shaft (2) and connect input shaft gear (22), this shaftgear (22) and the normal engagement of reverse output gear (32) that is sleeved on the output shaft (3); Be set with slide block (5) on the output shaft (3) between reverse output gear (32) and the forward output gear (31), slide block (5) is gone up and is connected shift fork (77); Respectively fixedly mount a cover friction plate clutch (6) on reverse output gear (32) and the forward output gear (31).

2, a kind of bistable commutator according to claim 1, it is characterized in that: described friction plate clutch (6) comprises friction plate outer support frame (61), active friction plate (62), from movable friction plate (63), platen (64), spline housing (65), spline housing (65) key is installed on the output shaft (3), be installed on the spline housing (65) by keyway from movable friction plate (63), active friction plate (62) is installed on the friction plate outer support frame (61) by keyway, platen (64) is sleeved on the output shaft (3), is positioned at from the outside of movable friction plate (63) and active friction plate (62).

3, a kind of bistable commutator according to claim 1 and 2, it is characterized in that: the other end of shift fork connects the output shaft of permanent-magnet operating mechanism (7), be provided with mechanism's output shaft (72) in the shell of this permanent-magnet operating mechanism (71), it is overhanging that mechanism's output shaft (72) passes the end cap (76) at shell (71) two ends, be fixed with iron core (73) on mechanism's output shaft (72), the arranged outside of iron core (73) has permanent magnet (74), permanent magnet (74) is fixedlyed connected with shell (71), between the two ends of permanent magnet (74) and the end cap (76) set of pulses coil (75) is set respectively.