CN204794479U - A there is brush motor for wheelchair - Google Patents
A there is brush motor for wheelchair Download PDFInfo
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- CN204794479U CN204794479U CN201520443351.XU CN201520443351U CN204794479U CN 204794479 U CN204794479 U CN 204794479U CN 201520443351 U CN201520443351 U CN 201520443351U CN 204794479 U CN204794479 U CN 204794479U
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- carbon brush
- brush
- motor
- stationary magazine
- magazine creel
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Abstract
The utility model discloses a there is brush motor for wheelchair, 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 element who is connected with the carbon brush electricity 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, lie in the direct switching -over piece contact with the commutator of the downthehole carbon brush of carbon brush, fix the filter element between double -phase adjacent carbon brush hole then direct electromagnetic interference with producing eliminates, and then reach and reduce the probability that has brush motor commutator to produce the electric spark, reduce to have the purpose of the loss of brush motor inner part.
Description
Technical field
The utility model relates to wheelchair accessory field, especially relates to a kind of brush motor for wheelchair.
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 a kind of brush motor for wheelchair, 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:
A kind of brush motor for wheelchair, 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 element be electrically connected with carbon brush is installed in stationary magazine creel, 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.
In the utility model; the carbon brush being positioned at carbon brush hole directly contacts with the commutator segment of commutator; now be fixed on the filter element 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.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 element, for temperature, filter element is affected, the utility model has stationary magazine creel in the outer setting of filter element, 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 element is made to be that level transmission is opened, the situation generation that thermal stress around reduction filter element is concentrated and impaired, finally realize the job stability of brush motor.
For strengthening filter element to the filtration of spark electromagnetism, further, the root of the two ends of filter element described carbon brush adjacent with two is respectively connected.Filter element 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 element is connected to the root of carbon brush, can filters this spark electromagnetism rapidly, so reach quick jamproof object.
For realizing the filter action of filter element to spark electromagnetic interference, further, described filter element is EMC filter.EMC filter has another name called Electro Magnetic Compatibility filter, 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.
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 element 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 element 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 element 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 element 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, the setting of EMC filter, 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.
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 element quick heat radiating.
Accompanying drawing explanation
Fig. 1 is the structural representation of an a kind of brush motor specific embodiment for wheelchair described in the utility model;
Fig. 2 is a kind of structural representation for motor stator in the brush motor of wheelchair and a rotor specific embodiment described in the utility model;
Fig. 3 is a kind of structural representation for an end cap specific embodiment in the brush motor of wheelchair described in the utility model;
Fig. 4 is a kind of partial structurtes schematic diagram for a stationary magazine creel specific embodiment in the brush motor of wheelchair described in the utility model;
Fig. 5 is a kind of partial structurtes schematic diagram for a fin specific embodiment in the brush motor of wheelchair 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, 6, stationary magazine creel, 7, filter element, 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 5, a kind of brush motor for wheelchair, 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 element 7 be electrically connected with carbon brush 5 is installed in stationary magazine creel 6, 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.
In the present embodiment, filter element 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 element 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.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 element 7, for temperature, filter element 7 is affected, the present embodiment has stationary magazine creel 6 in the outer setting of filter element 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 element 7 is made to be that level transmission is opened, the situation generation that thermal stress around reduction filter element 7 is concentrated and impaired, finally realize the job stability of brush motor.
Preferably, the root of the two ends of filter element 7 described carbon brush 5 adjacent with two is respectively connected.Filter element 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.Because carbon brush 5 is maximum with the spark electromagnetism of commutator 31 contact position, filter element 7 is connected to the root of carbon brush 5, can filters this spark electromagnetism rapidly, so reach quick jamproof object.
As preferably, EMC filter has another name called Electro Magnetic Compatibility filter, 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.
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 element 7 quick heat radiating.
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 element 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 element 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 (5)
1. the brush motor for wheelchair, 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 element (7) be electrically connected with carbon brush (5) is installed in stationary magazine creel (6), 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).
2. a kind of brush motor for wheelchair according to claim 1, is characterized in that: the root of the two ends of filter element (7) described carbon brush (5) adjacent with two is respectively connected.
3. a kind of brush motor for wheelchair according to claim 1, is characterized in that: described filter element (7) is EMC filter.
4. a kind of brush motor for wheelchair 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.
5. according to a kind of brush motor for wheelchair in Claims 1 to 4 described in any one, it 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 |
|---|---|---|---|
| CN201520443351.XU CN204794479U (en) | 2015-06-25 | 2015-06-25 | A there is brush motor for wheelchair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520443351.XU CN204794479U (en) | 2015-06-25 | 2015-06-25 | A there is brush motor for wheelchair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204794479U true CN204794479U (en) | 2015-11-18 |
Family
ID=54534455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520443351.XU Active CN204794479U (en) | 2015-06-25 | 2015-06-25 | A there is brush motor for wheelchair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204794479U (en) |
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2015
- 2015-06-25 CN CN201520443351.XU patent/CN204794479U/en active Active
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |