CN2272509Y

CN2272509Y - Single axle type clutch worm speed-reducer

Info

Publication number: CN2272509Y
Application number: CN 96214058
Authority: CN
Inventors: 李垂滨
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-06-04
Filing date: 1996-06-04
Publication date: 1998-01-14
Anticipated expiration: 2006-06-04

Abstract

The utility model relates to a single axle type clutch worm speed-reducer. The motor worm rod of the single axle type clutch worm speed-reducer is directly engaged with an interlocking worm gear on an output shaft. The interlocking worm gear is integrally provided with a driven gear. The output shaft is integrally provided with the gear and is engaged with a clutch inner gear which can slide according to the control. One end of the output shaft is provided with an accommodated bore and is provided with an operating rod and a spring to be connected with the clutch inner gear to form integration. The operating rod can move forward or backward by operating the adjusting screw sleeve of the operating rod to control the driven gear of the clutch output shaft of the clutch inner gear. Therefore, this can realize that the motor is not interlocked or interlocked together with the motor. Therefore, so long as a single axle can be used to obtain the goal that the power-driven wheelchair can be controlled to manually push no matter the power-driven wheelchair is in power or not in power.

Description

Single axle clutch worm reduction gear

The utility model relates to a kind of worm reduction gear of electric wheelchair, refers to a kind of single axle clutch worm reduction gear especially.

But electric wheelchair must have the worm reduction gear of a clutch so that be the state of " closing " and electronic walking about according to control, or be " from " state and promote it by other people.And the traditional type person all is set as " twin axle ", see also Figure 1A and Figure 1B, worm screw 1 is established in one motor M axle center, be engaged in the interlock worm gear 4 that is integral with couple axle 2, and couple axle 2 and be provided with driven gear 3, it meshes and output shaft 6 all-in-one-piece clutch gears 5 again, and this clutch gear 5 is established ring groove and plugged a clutch turning lever 8, and output shaft 6 promptly makes up wheel hub 7; Clutch gear 5 is broken away from or engagement driven gear 3 by pulling clutch turning lever 8, thus the wheel idle running or the electronic commentaries on classics of control wheel hub 7.Above-mentioned mode, though can reach from, the purpose of closing, it has following shortcoming:

1. it belongs to " twin axle (couple axle 2, output shaft 6 are arranged) ", and its element is many.Complex structure, whole cost is higher, assembling is more difficult.

2. element is many, complicated, and the volume that is constituted is must be big, weight is heavier, for space, the heavy burden of electric wheelchair, causes benzene heavy and not light on foot.

3. motor M power source output is rotated through the contact of element layer by layer, and is inevitable in each interelement consumed power to some extent more or less, and will cause power loss more more than the element.

4. pull type clutch has the anxiety of misoperation.

Therefore, the worm reduction gear of traditional type, in fact remain to be improved part, the purpose of this utility model is to provide that a kind of element minimizing, designs simplification, volume reduce, weight saving, reduce cost, reduce the single axle clutch worm reduction gear that power dissipation rates and Security improve.

According to the utility model, a kind of single axle clutch worm reduction gear is provided, comprise that a groups of motors with worm screw is loaded on the housing, and cooperate oil sealing, bearing, capping, and group is established an output shaft with interlock worm gear, gear, its interlock worm gear does not form one with output shaft, can dally according to control, and be meshed with worm screw; Wherein: one of this output shaft end periphery is provided with thread, and be provided with the receiving hole of hollow, spring is housed in it, and this gear is provided with the chute that runs through receiving hole, and the operating bar of band chute is housed in this receiving hole, is resisted against spring, and gear jacket is established a clutch internal gear with ring groove and perforation, and, clutch internal gear and gear train are integrated to pass the chute of perforation and gear in conjunction with lock, cooperate the C type clasp that prevents in conjunction with the pin disengaging again; The thread of output shaft one end is connected with one and has the perforation and the adjustment swivel nut of thread, and this operating bar exposes the adjustment swivel nut, is provided with the snap ring that prevents that operating bar from deviating from; One side of the corresponding gear of this interlock worm gear is provided with the driven gear of protrusion, meshes with the clutch internal gear.

Adopt the utility model, volume weight and cost are more simplified, reduced to the structure of its speed reducer, and because of element reduces, and reduce the consumption motor power of element operation process, can get higher power utilization.

For making those of ordinary skills to the effect of the utility model understanding completely be arranged, conjunction with figs. is with regard to structure, composition, action, the efficacy characteristics of the utility model, after being described in more detail in now.In the accompanying drawings:

Figure 1A is the schematic representation of the clutch action of traditional type structure;

Figure 1B is the traditional type configuration schematic diagram;

Fig. 2 is the utility model three-dimensional exploded view;

Fig. 3 is the utility model assembled sectional view, and the state that closes is shown;

Fig. 4 is the utility model assembled sectional view, illustrate from state;

Fig. 5 A is that illustration is implemented in the clutch of the utility model pull type;

Fig. 5 B and 5C are the M-M sectional view of Fig. 5 A, crank is shown respectively is in diverse location.

See also Fig. 2,3, the one motor M with worm screw 1 is assembled in the housing 90, and cooperate oil sealing 93, bearing 92, capping 32, and group is established an output shaft 60 with interlock worm gear 66, gear 62, its interlock worm gear 66 is not integral with output shaft 60, be and dally according to control, and be meshed with worm screw 1.

One of this output shaft 60 end periphery is provided with thread 64, and be provided with the receiving hole 61 of hollow, spring 65 is housed in it, and gear 62 is provided with the chute 63 that runs through receiving hole 61, the operating bar 30 of band chute 33 is housed in this receiving hole 61, just be resisted against spring 65, and gear 62 outer sheathed has the clutch internal gear 50 of ring groove 51 and perforation 53, and to pass the chute 63 of perforation 53 and gear 62 in conjunction with pin 52, clutch internal gear 50 and gear 62 are combined into one, cooperate C type clasp 54 to prevent to break away from again in conjunction with pin 52.

The thread 64 of output shaft 60 1 ends is connected with one and has the perforation 42 and the adjustments swivel nut 40 of internal screw thread 41, and makes operating bar 30 expose adjustment swivel nut 40, establishes snap ring 31 again and prevents that operating bar 30 from deviating from.

One side of the corresponding gear 62 of interlock worm gear 66 is provided with the driven gear 67 of protrusion, can with 50 engagements of clutch internal gear.

According to the structure of above-mentioned member, action, the effect of the utility model are described as follows:

Please consult Fig. 3 again, when adjustment swivel nut 40 is not screwed into, operating bar 30 is subjected to the elastic force of spring 65, be fallback state, it promptly drives clutch internal gear 50 in conjunction with pin 52 and retreats (toward driven gear 67 directions), make it and driven gear 67 engagements, and driven gear 67 is to become one with interlock worm gear 66, therefore, the screw rod 1 of motor M rotates interlock worm gear 66, and then rotates clutch internal gear 50, linked gear 62 again, and then rotary output axis 60, be the state of " closing ", and wheel that can electronic rotation wheel hub 7.When desiring to be " not electronic; as to promote " by artificial (other people), must make output shaft 60 idle runnings (not meshed) by worm screw 1, at this moment, as shown in Figure 4, being screwed into adjustment swivel nut 40 advances operating bar 30, it can promote clutch internal gears 50 in conjunction with pin 52, makes it to recess driven gear 67 and no longer is meshing with each other, promptly be " from " state, although the worm screw 1 of motor M is rotated interlock worm gear 66, be sleeved on output shaft 60 because of

interlock worm gear

66,67 of driven gears are, do not become one, therefore, whole output shaft 60 can be not by motor M interlock, and can be artificial promotion.By above-mentioned explanation, the utility model only needs " single shaft ", " swivel nut 40 is adjusted in operation " as can be known, and promptly may command is from, the setting of closing state.

Again, the utility model is aspect other details, and also imagination is thoughtful, please consults Fig. 2,3 again, is provided with tank filler sleeve 91 on housing 90, can conveniently refuel in the shell, and retaining member is lubricated; Aspect the flexible start of operating bar 30, insert operating bars 30 chutes 33 with locking pin 68, make that operating bar 30 can only start on chute 33 length directions, and do not have the anxiety of adjustment swivel nut 40; Aspect capping 32, be embedded with oil sealing 94 in capping 32 faces, can guarantee that capping 32 places are oil-proof.

In addition, according to above-mentioned main member, technological means, the utility model it " clutch for clutch control " also can be set as pull type, as shown in Figure 5, establishes fit annular groove 72 in clutch internal gear 50 peripheries, and the slide block 71 with L shaped crank 70 just inserts fit annular groove 72 again.When the state of " closing ", slide block 71 and the 72 corresponding not starts of fit annular groove, and allow clutch internal gear 50 engageable driven gears 67, when desire to be set as " from " state the time, switching crank 70 is also located it, its slide block 71 can be stirred clutch internal gear 50, makes it to withdraw from not to be engaged in driven gear 67; Again, also can not establish crank 70, and directly establish electric clutch, connect wheel hub again in output wheel 60 ends, directly by Clutch Control it.

Sum up above-mentionedly, the utility model is real to have following advantages, feature:

1. only need " single shaft (output shaft 60) " can have simultaneously the function of clutch, reduce volume, Element also reduces, and then designs simplification, reduces cost, assembles easily, and fault rate reduces.

2. volume reduces, and easily with cooperating that the wheelchair body disposes, its weight also reduces, and makes wheelchair Light.

3. few, the designs simplification of member, and reduce motor power in the consumption rate of transmission process, because of And can reduce motor horsepower specification, to reducing volume, weight and cost, also benefit to some extent.

4. threaded control clutch, can prevent from, the mistake of closing is touched by foreign object and misoperation takes place.

5. bearing, oil sealing number are reduced to minimumly, can reduce and change bearing cost (bearing must need to change when using time long) and reduce oil impregnate place (lubricant oil is often oozed out by the oil sealing place, and traditional type has more oil sealing).

Claims

1. a single axle clutch worm reduction gear comprises that a groups of motors with worm screw is loaded on the housing, and cooperates oil sealing, bearing, capping, and group is established an output shaft with interlock worm gear, gear, its interlock worm gear does not form one with output shaft, can dally according to control, and be meshed with worm screw; It is characterized in that:

One of this output shaft end periphery is provided with thread, and be provided with the receiving hole of hollow, spring is housed in it, and this gear is provided with the chute that runs through receiving hole, and the operating bar of band chute is housed in this receiving hole, is resisted against spring, and gear jacket is established a clutch internal gear with ring groove and perforation, and, clutch internal gear and gear train are integrated to pass the chute of perforation and gear in conjunction with lock, cooperate the C type clasp that prevents in conjunction with the pin disengaging again;

The thread of output shaft one end is connected with one and has the perforation and the adjustment swivel nut of thread, and this operating bar exposes the adjustment swivel nut, is provided with the snap ring that prevents that operating bar from deviating from;

One side of the corresponding gear of this interlock worm gear is provided with the driven gear of protrusion, meshes with the clutch internal gear.

2. single axle clutch worm reduction gear according to claim 1 is characterized in that the clutch internal gear is provided with the fit annular groove, and is assembled with the switching crank that the state that one has slide block, can make the clutch internal gear be separate or merge moves.

3. single axle clutch worm reduction gear according to claim 1 is characterized in that, plugs a locking pin on the chute of operating bar.

4. single axle clutch worm reduction gear according to claim 1 is characterized in that, adjusts swivel nut and is screwed together on the output shaft by thread.