CN204794622U - Take wheelchair motors of filtering function - Google Patents
Take wheelchair motors of filtering function Download PDFInfo
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- CN204794622U CN204794622U CN201520450071.1U CN201520450071U CN204794622U CN 204794622 U CN204794622 U CN 204794622U CN 201520450071 U CN201520450071 U CN 201520450071U CN 204794622 U CN204794622 U CN 204794622U
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- carbon brush
- stationary magazine
- magazine creel
- commutator
- fin
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Abstract
The utility model discloses a take wheelchair motors of filtering function, which comprises a motor shell body, the end cover, motor shaft and electric motor rotor, the last cover of electric motor rotor is equipped with the commutator, it has a plurality of carbon brush holes to open on the anchor ring of end cover, the downthehole carbon brush that acts on the commutator of installing of carbon brush, be provided with the stationary magazine creel between two adjacent carbon brush holes, install the filter circuit who is connected with the equal electricity of the root of double -phase adjacent carbon brush in the stationary magazine creel, be provided with a plurality of fin on the outer wall of stationary magazine creel, the fin middle part is sunken along the radial direction outwards of end cover, and the both ends of fin form extension A and extension B respectively. The utility model discloses in, can suppress influences with eliminating motor operation and opening strong electromagnetic interference and the electric spark that the stopping time produced, and then the reduction that realizes electronic wheelchair fault rate in the use with and life's extension.
Description
Technical field
The utility model relates to wheelchair accessory field, especially relates to the wheel chair motor of band filter function.
Background technology
Driving arrangement in electric wheelchair is for its scope of application, be divided into brush motor and brushless electric machine, whether the difference of brush motor and brushless electric machine is configured with conventional brush-commutator, have the commutation of brushless motor always by electrographite brush be arranged on epitrochanterian annular commutator and contact and realize, brushless electric machine then feeds back to control circuit by Hall element rotor-position, can know the correct time that motor phase commutates.The motor that most of brushless electric machine manufacturer produces all has three Hall effect alignment sensors, because brushless electric machine does not have brush, therefore does not also have relevant interface, and therefore cleaner, noise is less, in fact Maintenance free, and the life-span is longer.
But European Union's high standard requires to use brush motor, because brushless electric machine will produce one section and compose electromagnetic signal by force, the normal operation of medicine equipment can be affected like this, such as cardiac pacemaker, CT nulcear magnetic resonance (NMR), these all need to ask and will use in electromagnetic space environment relatively.Therefore, for the wheelchair user that may enter in these regions, brush motor is set in wheelchair and then seems and be necessary very much.But in brush motor running, when brush and the indirect contact of commutator are from an end bay to the moment of another side, the electric current in commutator is reverse, adds coil and there is self inductance, very easily produce certain spark electromagnetic interference between brush and commutator.
Utility model content
The purpose of this utility model overcomes the deficiencies in the prior art, provides the wheel chair motor of band filter function, reduces the probability that brush motor commutator produces electric spark, reduce the loss of brush motor inner part.
The purpose of this utility model is achieved through the following technical solutions:
With the wheel chair motor of filter function, comprise the one end open other end to close and the electric machine casing being provided with motor stator in the inner, for the end cap of closed electric machine casing openend, the machine shaft be connected with motor stator and to be sheathed on machine shaft and to be positioned at the rotor of end cap, rotor is arranged with commutator, the anchor ring of end cap has multiple carbon brush hole, the carbon brush acting on commutator is installed in carbon brush hole, stationary magazine creel that is curved and that be communicated with carbon brush hole is provided with between two adjacent carbon brush holes, the filter circuit that the root being provided with carbon brush adjacent with two in stationary magazine creel is all electrically connected, the outer wall of stationary magazine creel is provided with multiple fin along its circumferencial direction, cave in along the direction radially of end cap in the middle part of fin, and the two ends of fin form extension A and extension B respectively, the height of the summit distance stationary magazine creel outer wall of described extension A is less than the height of summit apart from stationary magazine creel outer wall of extension B, described filter circuit comprises electric capacity C1, C2, C3 and inductance L 1, L2, electric capacity C1, C2 connect, electric capacity C3, inductance L 2 are connected, another termination power cathode of electric capacity C1, C3, another termination power anode of electric capacity C2, inductance L 2, one in adjacent two carbon brush connect with inductance L 1 after, between in another termination power cathode of inductance L 1, adjacent two carbon brush one access electric capacity C3 and inductance L 2.
In the utility model, filter circuit is electrically connected on the root of carbon brush, is also namely connected to the contact point place of infinite approach carbon brush and commutator.The carbon brush being positioned at carbon brush hole directly contacts with the commutator segment of commutator; now be fixed on the filter circuit then direct electromagnetic interference elimination that will produce between two adjacent carbon brush holes; and then reduce the number of times of motor field loss protection action chaser; ensure the normal operation of motor; reach and reduce the probability that brush motor commutator produces electric spark, reduce the object of the loss of brush motor inner part.Filter circuit is electrically connected on the root of carbon brush, is also namely connected to the contact point place of infinite approach carbon brush and commutator.Because the spark electromagnetism of carbon brush and commutator contact position is maximum, filter circuit is connected to the root of carbon brush, can filters this spark electromagnetism rapidly, so reach quick jamproof object.Particularly, the inductance value of the capacitance of electric capacity C1, C2, C3 and inductance L 1, L2 can be set respectively, the frequency band of demand can be obtained.Wherein, by the setting of inductance L 1 and L2, both magnetic fluxs can be suppressed to cancel out each other, reduce the variation of the inductance value that magnetic flux density produces.After motor uses for a long time, electric machine casing internal operation assembly can produce a large amount of heats, and the ambient temperature in electric machine casing constantly raises with the accumulation of heat, directly have influence on the job stability of filter circuit, for temperature, filter circuit is affected, the utility model has stationary magazine creel in the outer setting of filter circuit, and on the outer wall of stationary magazine creel, multiple fin is installed, the medial recess of fin, and its two ends form extension A and extension B to outer expansion, fin is made to form bottom thick, the structure of top thin, the stress reduced when processing and manufacturing is concentrated, between extension A and extension B, there is certain difference in height simultaneously, the heat around filter circuit is made to be that level transmission is opened, the situation generation that thermal stress around reduction filter circuit is concentrated and impaired, finally realize the job stability of brush motor.
For realizing the installation of carbon brush in carbon brush hole, further, described carbon brush comprise be installed on upper end open place, described carbon brush hole location upper cover, be fixed on upper cover lower end, location and jointly form location lower cover and the motion bar of zone of action with location upper cover, the upper end of motion bar is positioned at zone of action through location lower cover, and the upper end of avoiding departing from location lower cover is provided with in this end, the lower end of motion bar is fixed with carbon brush head, motion bar is arranged with elastic component, and elastic component acts on carbon brush head and makes the lower end of carbon brush head stretch out the lower ending opening in carbon brush hole.In the utility model, location upper cover can with carbon brush hole upper end open threaded engagement.During application, the lower end of carbon brush head contacts to absorb with the anchor ring of commutator composes electromagnetic interference by force, but unavoidably have a little radial wobble when rotor rotates under magnetic fields, so then can drive a little vibrations that the commutator be sheathed on rotor also occurs in radial direction.And by the setting of elastic component, then effectively can absorb this and shake the shock brought, like this, the mutual wearing and tearing between carbon brush head and commutator can be reduced.Wherein, zone of action moving radially for motion bar of stepping down.
Further, the arc length of described fin is 3/4ths of described stationary magazine creel excircle.Heat in electric machine casing is mainly concentrated from coil, and the heat that coil produces can directly be radiated on end cap, for optimizing end cap inner structure layout and reducing the difficulty of processing of each parts in end cap, the arc length of fin is set to 3/4ths of stationary magazine creel excircle by the utility model, and this section of arc length is just to the commutator segment of commutator, remaining four/a part of stationary magazine creel outer wall then contact internal walls that is direct and end cap is fixed, and finally realizes filter circuit quick heat radiating.
Further, described carbon brush hole is provided with 4, and is uniformly distributed on the anchor ring of described end cap.In the utility model, correspondingly, carbon brush is provided with 4, and filter circuit also should have 4.Setting like this, on the one hand, can strengthen the absorption of carbon brush to strong spectrum electromagnetic signal, the strong electromagnetic produced when suppressing and eliminate motor rotation and start and stop; On the other hand, also can strengthen the absorption of filter circuit to spark electromagnetic interference, realize the electric wheelchair in use reduction of failure rate and the prolongation in its useful life.
Compared with prior art, the utility model has following beneficial effect:
1, when the utility model uses; the carbon brush being positioned at carbon brush hole directly contacts with the commutator segment of commutator; now be fixed on the filter circuit then direct electromagnetic interference elimination that will produce between two adjacent carbon brush holes; and then reduce the number of times of motor field loss protection action chaser; ensure the normal operation of motor; reach and reduce the probability that brush motor commutator produces electric spark, reduce the object of the loss of brush motor inner part.
2, unavoidably have a little radial wobble when rotor rotates under magnetic fields, so then can drive a little vibrations that the commutator be sheathed on rotor also occurs in radial direction.And pass through the setting of elastic component and zone of action, then effectively can absorb this and shake the shock brought, like this, the mutual wearing and tearing between carbon brush head and commutator can be reduced.
3, the arc length of fin is set to 3/4ths of stationary magazine creel excircle by the utility model, and this section of arc length is just to the commutator segment of commutator, remaining four/a part of stationary magazine creel outer wall then contact internal walls that is direct and end cap is fixed, and finally realizes filter circuit quick heat radiating.
4, by the setting of filter circuit, the strong electromagnetic produced when can suppress and eliminate motor rotation and start and stop and electric spark impact, and then realize the electric wheelchair in use reduction of failure rate and the prolongation in its useful life, increase the scope of application of electric wheelchair simultaneously, reduce the limited field of user.
Accompanying drawing explanation
Fig. 1 is the structural representation of a wheel chair motor specific embodiment of band filter function described in the utility model;
Fig. 2 is the structural representation of motor stator and a rotor specific embodiment in the wheel chair motor of band filter function described in the utility model;
Fig. 3 is the structural representation of an end cap specific embodiment in the wheel chair motor of band filter function described in the utility model;
Fig. 4 is the structural representation of a carbon brush specific embodiment in the wheel chair motor of band filter function described in the utility model;
Fig. 5 is the partial structurtes schematic diagram of a stationary magazine creel specific embodiment in the wheel chair motor of band filter function described in the utility model;
Fig. 6 is the partial structurtes schematic diagram of a fin specific embodiment in the wheel chair motor of band filter function described in the utility model;
Fig. 7 is the structural representation of a filter circuit specific embodiment in the wheel chair motor of band filter function described in the utility model.
Name in accompanying drawing corresponding to Reference numeral is called: 1, electric machine casing, 2, motor stator, 3, rotor, 31, commutator, 4, end cap, 41, carbon brush hole, 5, carbon brush, 51, location upper cover, 52, location lower cover, 53, motion bar, 54, carbon brush head, 55, elastic component, 6, stationary magazine creel, 7, filter circuit, 8, fin, 81, extension A, 82, extension B, 9, machine shaft.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.
Embodiment 1
As shown in Figures 1 to 7, with the wheel chair motor of filter function, comprise the one end open other end to close and the electric machine casing 1 being provided with motor stator 2 in the inner, for the end cap 4 of closed electric machine casing 1 openend, the machine shaft 9 be connected with motor stator 2 and to be sheathed on machine shaft 9 and to be positioned at the rotor 3 of end cap 4, rotor 3 is arranged with commutator 31, the anchor ring of end cap 4 has multiple carbon brush hole 41, the carbon brush 5 acting on commutator 31 is installed in carbon brush hole 41, stationary magazine creel 6 that is curved and that be communicated with carbon brush hole 41 is provided with between two adjacent carbon brush holes 41, the filter circuit 7 that the root being provided with carbon brush 5 adjacent with two in stationary magazine creel 6 is all electrically connected, the outer wall of stationary magazine creel 6 is provided with multiple fin 8 along its circumferencial direction, cave in along the direction radially of end cap 4 in the middle part of fin 8, and the two ends of fin 8 form extension A81 and extension B82 respectively, the height of summit distance stationary magazine creel 6 outer wall of described extension A81 is less than the height of summit apart from stationary magazine creel 6 outer wall of extension B82, described filter circuit comprises electric capacity C1, C2, C3 and inductance L 1, L2, electric capacity C1, C2 connect, electric capacity C3, inductance L 2 are connected, another termination power cathode of electric capacity C1, C3, another termination power anode of electric capacity C2, inductance L 2, one in adjacent two carbon brush connect with inductance L 1 after, between in another termination power cathode of inductance L 1, adjacent two carbon brush one access electric capacity C3 and inductance L 2.
In the present embodiment, filter circuit 7 is electrically connected on the root of carbon brush 5, is also namely connected to the contact point place of infinite approach carbon brush 5 and commutator 31.The carbon brush 5 being positioned at carbon brush hole 41 directly contacts with the commutator segment of commutator 31; the electromagnetic interference produced then directly is eliminated by the filter circuit 7 be now fixed between two adjacent carbon brush holes 41; and then reduce the number of times of motor field loss protection action chaser; ensure the normal operation of motor; reach and reduce the probability that brush motor commutator produces electric spark, reduce the object of the loss of brush motor inner part.Filter circuit is electrically connected on the root of carbon brush, is also namely connected to the contact point place of infinite approach carbon brush and commutator.Because the spark electromagnetism of carbon brush and commutator contact position is maximum, filter circuit is connected to the root of carbon brush, can filters this spark electromagnetism rapidly, so reach quick jamproof object.Particularly, the inductance value of the capacitance of electric capacity C1, C2, C3 and inductance L 1, L2 can be set respectively, the frequency band of demand can be obtained.Wherein, by the setting of inductance L 1 and L2, both magnetic fluxs can be suppressed to cancel out each other, reduce the variation of the inductance value that magnetic flux density produces.After motor uses for a long time, electric machine casing 1 internal operation assembly can produce a large amount of heats, and the ambient temperature in electric machine casing 1 constantly raises with the accumulation of heat, directly have influence on the job stability of filter circuit 7, for temperature, filter circuit 7 is affected, the present embodiment has stationary magazine creel 6 in the outer setting of filter circuit 7, and multiple fin 8 is installed on the outer wall of stationary magazine creel 6, the medial recess of fin 8, and its two ends form extension A81 and extension B82 to outer expansion, fin 8 is made to form bottom thick, the structure of top thin, so, the stress that can reduce when processing and manufacturing is concentrated, between extension A81 and extension B82, there is certain difference in height simultaneously, the heat around filter circuit 7 is made to be that level transmission is opened, the situation generation that thermal stress around reduction filter circuit 7 is concentrated and impaired, finally realize the job stability of brush motor.
For realizing the installation of carbon brush 5 in carbon brush hole 41, preferably, described carbon brush 5 comprises the location upper cover 51 being installed on upper end open place, described carbon brush hole 41, be fixed on upper cover 51 lower end, location and jointly form location lower cover 52 and the motion bar 53 of zone of action with location upper cover 51, the upper end of motion bar 53 is positioned at zone of action through location lower cover 52, and the upper end of avoiding departing from location lower cover 52 is provided with in this end, the lower end of motion bar 53 is fixed with carbon brush head 54, motion bar 53 is arranged with elastic component 55, elastic component 55 acts on carbon brush head 54 and makes the lower end of carbon brush head 54 stretch out the lower ending opening in carbon brush hole 41.In the present embodiment, location upper cover 51 can with carbon brush hole 41 upper end open threaded engagement.During application, the lower end of carbon brush head 54 contacts to absorb with the anchor ring of commutator 31 composes electromagnetic interference by force, but unavoidably have a little radial wobble when rotor 3 rotates under magnetic fields, so then can drive a little vibrations that the commutator 31 be sheathed on rotor 3 also occurs in radial direction.And pass through the setting of elastic component 55, then effectively can absorb this and shake the shock brought, like this, the mutual wearing and tearing between carbon brush head 54 and commutator 31 can be reduced.Wherein, zone of action moving radially for motion bar 53 of stepping down.
Heat in electric machine casing 1 is mainly concentrated from coil, and the heat that coil produces can directly be radiated on end cap 4, for optimizing end cap 4 inner structure layout and reducing the difficulty of processing of each parts in end cap 4, the arc length of fin 8 is set to 3/4ths of stationary magazine creel 6 excircle by the present embodiment, and this section of arc length is just to the commutator segment of commutator 31, remaining four/a part of stationary magazine creel 6 outer wall then contact internal walls that is direct and end cap 4 is fixed, and finally realizes filter circuit 7 quick heat radiating.
Preferably, described carbon brush hole 41 is provided with 4, and is uniformly distributed on the anchor ring of described end cap 4.In the present embodiment, correspondingly, carbon brush 5 is provided with 4, and filter circuit 7 also should have 4.Setting like this, on the one hand, can strengthen the absorption of carbon brush 5 to strong spectrum electromagnetic signal, the strong electromagnetic produced when suppressing and eliminate motor rotation and start and stop; On the other hand, also can strengthen the absorption of filter circuit 7 pairs of spark electromagnetic interference, realize the electric wheelchair in use reduction of failure rate and the prolongation in its useful life.
Above content is the further description done the utility model in conjunction with concrete preferred implementation, can not assert that embodiment of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, not departing from other execution modes drawn under the technical solution of the utility model, all should be included in protection range of the present utility model.
Claims (4)
1. be with the wheel chair motor of filter function, comprise the one end open other end to close and the electric machine casing (1) being provided with motor stator (2) in the inner, for the end cap (4) of closed electric machine casing (1) openend, the machine shaft (9) be connected with motor stator (2) and to be sheathed on machine shaft (9) upper and be positioned at the rotor (3) of end cap (4), it is characterized in that: rotor (3) is arranged with commutator (31), the anchor ring of end cap (4) has multiple carbon brush hole (41), the carbon brush (5) acting on commutator (31) is installed in carbon brush hole (41), stationary magazine creel (6) that is curved and that be communicated with carbon brush hole (41) is provided with between two adjacent carbon brush holes (41), the filter circuit (7) that the root being provided with carbon brush (5) adjacent with two in stationary magazine creel (6) is all electrically connected, the outer wall of stationary magazine creel (6) is provided with multiple fin (8) along its circumferencial direction, cave in along the direction radially of end cap (4) in fin (8) middle part, and the two ends of fin (8) form extension A (81) and extension B (82) respectively, the height of summit distance stationary magazine creel (6) outer wall of described extension A (81) is less than the height of summit apart from stationary magazine creel (6) outer wall of extension B (82), described filter circuit (7) comprises electric capacity C1, C2, C3 and inductance L 1, L2, electric capacity C1, C2 connect, electric capacity C3, inductance L 2 are connected, another termination power cathode of electric capacity C1, C3, another termination power anode of electric capacity C2, inductance L 2, one in adjacent two carbon brush connect with inductance L 1 after, between in another termination power cathode of inductance L 1, adjacent two carbon brush one access electric capacity C3 and inductance L 2.
2. the wheel chair motor of band filter function according to claim 1, it is characterized in that: described carbon brush (5) comprises the location upper cover (51) being installed on described carbon brush hole (41) upper end open place, be fixed on upper cover (51) lower end, location and jointly form location lower cover (52) and the motion bar (53) of zone of action with location upper cover (51), the upper end of motion bar (53) is positioned at zone of action through location lower cover (52), and the upper end of avoiding departing from location lower cover (52) is provided with in this end, the lower end of motion bar (53) is fixed with carbon brush head (54), motion bar (53) is arranged with elastic component (55), elastic component (55) acts on carbon brush head (54) and makes the lower end of carbon brush head (54) stretch out the lower ending opening of carbon brush hole (41).
3. the wheel chair motor of band filter function according to claim 1, is characterized in that: the arc length of described fin (8) is 3/4ths of described stationary magazine creel (6) excircle.
4. the wheel chair motor of band filter function according to claim 1, is characterized in that: described carbon brush hole (41) is provided with 4, and is uniformly distributed on the anchor ring of described end cap (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520450071.1U CN204794622U (en) | 2015-06-25 | 2015-06-25 | Take wheelchair motors of filtering function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520450071.1U CN204794622U (en) | 2015-06-25 | 2015-06-25 | Take wheelchair motors of filtering function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204794622U true CN204794622U (en) | 2015-11-18 |
Family
ID=54534597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520450071.1U Active CN204794622U (en) | 2015-06-25 | 2015-06-25 | Take wheelchair motors of filtering function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204794622U (en) |
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2015
- 2015-06-25 CN CN201520450071.1U patent/CN204794622U/en active Active
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