Direct current motor assembly and direct current motor

Abstract

The invention discloses a direct-current motor assembly and a direct-current motor, and relates to the field of direct-current motors, the direct-current motor assembly comprises a rotor and a stator arranged on the outer side of the rotor, rotating shafts are arranged at the two ends of the rotor, and one rotating shaft is sleeved with a commutator; the carbon brush unit is composed of a carbon brush seat, a carbon brush, a positioning structure used for stabilizing the carbon brush and an elastic structure used for enabling the carbon brush to be in contact with the commutator, and a locking insertion hole is formed in the side face of the carbon brush seat; the locking unit comprises a control rod piece and a movable rod; the carbon brush is limited from the side face through the positioning structure, so that the carbon brush can be effectively prevented from shaking, it can be effectively guaranteed that the carbon brush does not deviate from the center line, the insulation roller and the carbon brush are in rolling friction, and replacement operation of the carbon brush is facilitated; the two carbon brush bases can be fixed at the same time through the locking unit, when the locking unit is used in cooperation with the ejection unit, the two carbon brush bases can be ejected out at the same time, carbon brushes can be replaced very conveniently, and time can be saved.

Description

Technical Field

[0001] The present invention relates to the technical field related to direct current motors, and in particular to a direct current motor component and a direct current motor. Background Art

[0002] A DC motor is a rotating motor that converts DC electrical energy into mechanical energy or vice versa. When a DC motor is operated as a motor, it is a DC motor that converts electrical energy into mechanical energy; when a DC motor is operated as a generator, it is a DC generator that converts mechanical energy into electrical energy.

[0003] At present, the carbon brushes of DC motors need to rely on brush holder slots for positioning, and the brush holder slots cooperate with carbon brush springs to ensure that the carbon brushes and commutator can maintain good contact. However, in order to facilitate the replacement of carbon brushes, there will inevitably be a gap between the brush holder slots and the carbon brushes. In addition, the elastic force of the carbon brush springs causes the carbon brushes to deviate from the center line when installing them. The vibration generated during the operation of the motor will also cause the carbon brushes to shake, resulting in poor contact between the carbon brushes and the commutator. Summary of the invention

[0004] In order to solve the defects in the prior art, the present invention provides a DC motor assembly and a DC motor.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: The DC motor assembly of the present invention comprises a rotor and a stator arranged outside the rotor, wherein both ends of the rotor are provided with rotating shafts, and a commutator is arranged on the outer sleeve of one of the rotating shafts; A carbon brush unit, which is composed of a carbon brush holder, a carbon brush, a positioning structure for stabilizing the carbon brush, and an elastic structure for making the carbon brush contact the commutator, wherein a locking socket is provided on the side of the carbon brush holder; The locking unit comprises a control rod and a movable rod, both ends of the movable rod are provided with locking rods plugged into the locking socket; Ejector unit for ejecting the carbon brush holder.

[0006] As a preferred technical solution of the present invention, the positioning structure includes two transmission brackets arranged face to face and a tension spring for connecting the two transmission brackets, one end of the transmission bracket is connected to a mounting plate, an insulating roller is rotatably arranged on the mounting plate to prevent the carbon brush from shaking, and an avoidance groove is provided at the bottom of the transmission bracket, and a T-shaped through hole is also provided on the transmission bracket.

[0007] As a preferred technical solution of the present invention, the elastic structure includes an adjustment plate and an adjustment screw rotatably arranged on one side of the adjustment plate, a positioning guide column is provided on the other side of the adjustment plate, and a carbon brush spring connected to the adjustment plate is provided on the outer sleeve of the positioning guide column.

[0008] As a preferred technical solution of the present invention, an installation groove one slidably matched with the adjusting plate is formed on the carbon brush holder. One end of the installation groove one is communicated with a connection hole matched with the adjusting screw rod, and the other end of the installation groove one is communicated with an installation groove two for installing the carbon brush. Two installation grooves three for accommodating the installation plate are communicated outside the installation groove two, and a conductor contacting the carbon brush is embedded at the bottom of the installation groove two.

[0009] As a preferred technical solution of the present invention, a U-shaped groove for installing the transmission bracket is formed at the bottom of the carbon brush holder. The upper end of the U-shaped groove is communicated with the installation groove two, and two groups of positioning sliding grooves are communicated at the bottom of the U-shaped groove. A support guide rod slidably matched with the T-shaped through hole is arranged in the U-shaped groove. The support guide rod penetrates through the carbon brush holder, and limiting blocks are arranged at both ends of the support guide rod.

[0010] As a preferred technical solution of the present invention, the control rod member includes a control cap, a control rod connected to the control cap, and a transmission sleeve sleeved outside the control rod. 2N L-shaped fitting grooves are formed at one end of the transmission sleeve. Fitting blocks matched with the L-shaped fitting grooves are symmetrically arranged on the outer wall of the control rod, and an extrusion ring plate is sleeved and fixed at one end of the control rod. A return spring is further sleeved on the outer wall of the control rod. The return spring is located between the transmission sleeve and the extrusion ring plate, and one end of the control rod is rotatably connected to the movable rod through a bearing.

[0011] As a preferred technical solution of the present invention, a limiting rod is arranged at one end of the locking plug rod, and a compression spring is sleeved on the outer wall of the limiting rod.

[0012] As a preferred technical solution of the present invention, the ejecting unit includes a cam sleeved and fixed outside the transmission sleeve, two movable plates contacting the cam, and at least two connecting springs for connecting the movable plates. A guiding groove is formed at one end of the movable plate, and an L-shaped transmission rod is installed at the other end. Two top plates are arranged at the end of the L-shaped transmission rod far from the movable plate.

[0013] A DC motor includes a motor housing for installing a stator and the above-mentioned DC motor assembly. End cover one and end cover two are respectively arranged at both ends of the motor housing. An assembly opening for installing the carbon brush holder is formed on end cover two. A support bracket for supporting the carbon brush holder is further arranged inside end cover two. A long conductor contacting the bottom of the conductor is arranged on the support bracket, and a cable is connected to the long conductor. Positioning guide rods slidably matched with the positioning sliding grooves are symmetrically arranged inside the support bracket. A through hole slidably matched with the locking plug rod is further formed on the support bracket, and two rotating shafts are rotatably connected to end cover one and end cover two through bearings respectively.

[0014] As a preferred technical solution of the present invention, the second end cover is also provided with an installation opening for installing a control rod, and the installation opening is rotatably connected to the transmission sleeve through a bearing, and two support columns arranged face to face are also provided in the second end cover, and a guide rod slidingly matched with the guide groove is provided between the two support columns, and a receiving hole for accommodating a limit rod is also provided on the support column, and a compression spring is located between the support column and the movable rod.

[0015] The beneficial effects of the present invention are: 1. This DC motor assembly and DC motor squeeze the insulating roller through the carbon brush, so that the insulating roller drives the mounting plate to move into the mounting groove three, and drives the transmission bracket through the mounting plate to further stretch the tension spring. At the same time, the insulating roller will abut against the carbon brush with the help of the elastic force of the tension spring, and limit the carbon brush from the side, thereby effectively preventing the carbon brush from shaking, and effectively ensuring that the carbon brush does not deviate from the center line. The insulating roller and the carbon brush are in rolling friction, which is conducive to the replacement operation of the carbon brush.

[0016] 2. This type of DC motor assembly and DC motor can adjust the position of the adjusting plate by rotating the adjusting screw, which can not only adjust the elastic force of the carbon brush spring, but also change the position of the carbon brush spring, which can effectively avoid the situation where the carbon brush cannot maintain good contact with the commutator due to insufficient length of the carbon brush spring after the carbon brush is worn, thereby extending the service life of the carbon brush.

[0017] 3. This DC motor assembly and DC motor, by pulling the control cap outward, the control rod drives the matching block to enter the L-shaped matching groove, and the control rod drives the movable rod and squeezes the reset spring and the compression spring to retract the locking rod into the through hole, and then the control rod is rotated to lock the control rod by clamping the matching block in the L-shaped matching groove. After the carbon brush holder is installed, the control rod is rotated in the opposite direction to complete the unlocking, and the locking rod is driven by the elastic force of the reset spring and the compression spring to insert the locking rod into the locking socket to complete the fixation of the carbon brush holder. Two carbon brush holders can be fixed at the same time. When used in conjunction with the ejection unit, two carbon brush holders can also be ejected at the same time, so that the carbon brushes can be replaced very conveniently and time can be saved.

[0018] 4. This DC motor assembly and DC motor lock the control rod by clamping the matching block in the L-shaped matching groove, so that the transmission sleeve can be driven by rotating the control rod, and the cam is driven to rotate by the transmission sleeve. In the process that the contact part between the cam and the movable plate changes from the short end to the long end, the cam pushes the movable plate to make the two movable plates move away from each other. The movable plate drives the top plate with the help of the L-shaped transmission rod, and the carbon brush holder is pushed out by the moving top plate. When the control rod is not locked, the rotating control cap will not drive the transmission sleeve, which can effectively prevent the carbon brush holder from being pushed out due to misoperation, and is more reliable.

[0019] 5. This DC motor assembly and DC motor can stably insert the locking rod into the locking socket through the elastic force provided by the return spring and the compression spring, thereby improving the stability of the installation of the carbon brush holder. After the control rod is unlocked, the elastic force of the return spring and the compression spring can drive the locking rod to return to its original position. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a structural schematic diagram of a DC motor assembly and a DC motor of the present invention; Figure 2 It is a schematic diagram of the internal structure of the housing of the DC motor assembly and the DC motor of the present invention; Figure 3 It is a schematic diagram of the internal structure of the DC motor assembly and the second end cover of the DC motor of the present invention; Figure 4 It is a schematic diagram of the internal structure of the DC motor assembly and the end cover 2 of the DC motor (the carbon brush unit is omitted); Figure 5 It is a schematic diagram of the second structure of the DC motor assembly and the end cover of the DC motor of the present invention; Figure 6 It is a schematic structural diagram of a DC motor assembly and a carbon brush unit of a DC motor from a first perspective of the present invention; Figure 7 It is a structural schematic diagram of the DC motor assembly and the carbon brush unit of the DC motor from a second viewing angle of the present invention; Figure 8 It is a schematic diagram of the positioning structure and elastic structure of the DC motor assembly and the DC motor of the present invention; Fig. 9 It is a structural schematic diagram of a DC motor assembly and a carbon brush holder of a DC motor from a first perspective of the present invention; Fig.10 It is a structural schematic diagram of the DC motor assembly and the carbon brush holder of the DC motor from a second viewing angle of the present invention; Fig.11 It is a schematic structural diagram of the DC motor assembly and the ejection unit and the locking unit of the DC motor of the present invention from a first perspective; Fig.12 It is a schematic structural diagram of the DC motor assembly and the ejection unit and the locking unit of the DC motor of the present invention from a second viewing angle; Fig.13 It is a third-view structural diagram of the DC motor assembly and the ejection unit and locking unit of the DC motor of the present invention; Fig.14 It is a schematic diagram of the structure of the DC motor assembly and the control rod of the DC motor of the present invention; Fig.15 This is a three-dimensional sectional view of the drive sleeve of the DC motor assembly and the DC motor of the present invention.

[0021] In the figure: 1, rotor; 2, stator; 3, commutator; 4, rotating shaft; 5, carbon brush unit; 51, carbon brush holder; 511, insertion hole; 512, positioning chute; 513, locking insertion hole; 514, conductor; 515, U-shaped groove; 516, second mounting groove; 517, third mounting groove; 52, carbon brush; 53, cover plate; 54, elastic structure; 541, carbon brush spring; 542, positioning guide post; 543, adjusting screw; 544, adjusting plate; 55, drive bracket; 551, avoidance groove; 56, tension spring; 57, mounting plate; 58, insulating roller; 59, support guide rod; 591, limit stop; 6, ejection unit; 61, movable plate; 62, connecting spring; 63, cam; 64, L-shaped transmission rod; 65, top plate; 7, locking unit; 71, movable rod; 72, locking insertion rod; 73, limiting rod; 74, compression spring; 75, drive sleeve; 751, L-shaped mating groove; 76, extrusion ring plate; 77, control rod; 771, mating block; 78, control cap; 79, return spring; 8, housing; 9, second end cover; 91, support bracket; 92, assembly port; 93, support column; 94, long conductor; 95, through hole; 96, guide rod; 10, first end cover. Detailed implementation manners

[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not intended to limit the present invention.

[0023] Embodiment: As Figure 1-4 , Figure 6 and Fig.11 shown, the DC motor assembly of the present invention includes a rotor 1 and a stator 2 provided outside the rotor 1. Rotating shafts 4 are provided at both ends of the rotor 1, and a commutator 3 is sleeved outside one of the rotating shafts 4; A carbon brush unit 5, which is composed of a carbon brush holder 51, a carbon brush 52, a positioning structure for stabilizing the carbon brush 52, and an elastic structure 54 for making the carbon brush 52 contact with the commutator 3. A locking insertion hole 513 is formed on the side surface of the carbon brush holder 51; A locking unit 7, which includes a control rod member and a movable rod 71. Locking insertion rods 72 inserted into the locking insertion holes 513 are provided at both ends of the movable rod 71; An ejection unit 6 for ejecting the carbon brush holder 51.

[0024] Among them, as Figure 6-8As shown, the positioning structure includes two transmission brackets 55 arranged face to face and a tension spring 56 for connecting the two transmission brackets 55, one end of the transmission bracket 55 is connected to a mounting plate 57, an insulating roller 58 is rotatably provided on the mounting plate 57 for preventing the carbon brush 52 from shaking, and an avoidance groove 551 is provided at the bottom of the transmission bracket 55, and a T-shaped through hole is also provided on the transmission bracket 55.

[0025] After the carbon brush 52 is installed into the second installation groove 516, the insulating roller 58 is squeezed to drive the mounting plate 57 to move into the third installation groove 517, and the transmission bracket 55 is driven by the mounting plate 57 to further stretch the tension spring 56. At the same time, the insulating roller 58 will abut against the carbon brush 52 with the help of the elastic force of the tension spring 56, and limit the carbon brush 52 from the side, so as to effectively prevent the carbon brush 52 from shaking, and effectively ensure that the carbon brush 52 does not deviate from the center line. The insulating roller 58 and the carbon brush 52 are in rolling friction, which is conducive to the replacement operation of the carbon brush 52.

[0026] Among them, Figure 6 and Figure 8 As shown, the elastic structure 54 includes an adjusting plate 544 and an adjusting screw 543 rotatably arranged on one side of the adjusting plate 544, and a positioning guide column 542 is provided on the other side of the adjusting plate 544. The positioning guide column 542 is provided with a carbon brush spring 541 connected to the adjusting plate 544 on its outer sleeve, and the positioning guide column 542 serves to position the carbon brush spring 541, which is convenient for replacing the carbon brush spring 541 at a later stage.

[0027] The position of the adjustment plate 544 can be adjusted by rotating the adjustment screw 543, which can not only adjust the elastic force of the carbon brush spring 541, but also change the position of the carbon brush spring 541, which can effectively avoid the situation where the carbon brush 52 cannot maintain good contact with the commutator 3 due to the insufficient length of the carbon brush spring 541 after the carbon brush 52 is worn, thereby extending the service life of the carbon brush 52.

[0028] Among them, Figure 7 , Fig. 9 and Fig.10 As shown, the carbon brush holder 51 is provided with a mounting groove 1 which is slidably matched with the adjustment plate 544, one end of the mounting groove 1 is connected with a connecting hole which is matched with the adjustment screw 543, the other end of the mounting groove 1 is connected with a mounting groove 2 516 for mounting the carbon brush 52, the mounting groove 2 516 is connected with two mounting grooves 3 517 for accommodating the mounting plate 57, and a conductor 514 which is in contact with the carbon brush 52 is embedded at the bottom of the mounting groove 2 516, and the conductor 514 is used to conduct current from the long conductor 94 to the carbon brush 52; the mounting groove 1 can provide installation space for the adjustment plate 544 and the carbon brush spring 541.

[0029] In this embodiment, the connecting hole is composed of a threaded hole screwed with the adjusting screw rod 543 and a sliding hole capable of accommodating the head of the adjusting screw rod 543. The cross-sectional shape of the connecting hole is T-shaped. The provided sliding hole facilitates the rotational movement of the adjusting screw rod 543 and provides sufficient space for the adjusting screw rod 543 to move into the carbon brush holder 51.

[0030] In this embodiment, a plugging hole 511 is further formed at the top of the carbon brush holder 51. A detachable cover plate 53 is provided at the top of the first installation groove. A plugging member inserted into the plugging hole 511 is provided at the bottom of the cover plate 53. The cover plate 53 is installed on the carbon brush holder 51 through the plugging connection between the plugging member and the plugging hole 511, making the cover plate 53 easy to disassemble and facilitating the repair or replacement of the elastic structure 54.

[0031] Among them, as Figure 8 and Fig. 9 shown, a U-shaped groove 515 for installing the transmission bracket 55 is formed at the bottom of the carbon brush holder 51. The upper end of the U-shaped groove 515 is communicated with the second installation groove 516. Two groups of positioning sliding grooves 512 are communicated and provided at the bottom of the U-shaped groove 515. And a support guide rod 59 slidably matched with the T-shaped through hole is provided in the U-shaped groove 515. The support guide rod 59 penetrates through the carbon brush holder 51. Limit stop blocks 591 are provided at both ends of the support guide rod 59. The provided limit stop blocks 591 play a limiting role on the transmission bracket 55; through the sliding fit between the support guide rod 59 and the T-shaped through hole, the deviation of the moving direction of the transmission bracket 55 can be effectively avoided.

[0032] Among them, as Fig.11 、 Fig.14 and Fig.15 shown, the control rod member includes a control cap 78, a control rod 77 connected to the control cap 78, and a transmission sleeve 75 sleeved outside the control rod 77. 2N L-shaped fitting grooves 751 are formed at one end of the transmission sleeve 75. Fitting blocks 771 matched with the L-shaped fitting grooves 751 are symmetrically provided on the outer wall of the control rod 77. An extrusion ring plate 76 is sleeved and fixed at one end of the control rod 77. Through the cooperation between the provided extrusion ring plate 76 and the transmission sleeve 75, the return spring 79 can be jointly extruded; the fitting blocks 771 can be clamped through the L-shaped fitting grooves 751, so as to realize the locking of the control rod 77; A return spring 79 is further sleeved on the outer wall of the control rod 77. The return spring 79 is located between the transmission sleeve 75 and the extrusion ring plate 76. And one end of the control rod 77 is rotatably connected to the movable rod 71 through a bearing.

[0033] The control cap 78 is pulled outward to make the control rod 77 drive the matching block 771 to enter the L-shaped matching groove 751, and the control rod 77 drives the movable rod 71 and squeezes the return spring 79 and the compression spring 74, so that the locking rod 72 is retracted into the through hole 95, and then the control rod 77 is rotated to lock the matching block 771 through the L-shaped matching groove 751, and then the carbon brush holder 51 with the carbon brush 52 is installed from the assembly opening 92, and then the control rod 77 is rotated in the opposite direction to complete the unlocking, and the locking rod 72 is driven by the elastic force of the return spring 79 and the compression spring 74 to insert the locking rod 72 into the locking hole 513 to complete the fixation of the carbon brush holder 51, and two carbon brush holders 51 can be fixed at the same time; When it is necessary to remove the carbon brush holder 51, operate the control rod 77 to disengage the locking rod 72 from the locking socket 513, then lock the control rod 77, and then continue to rotate the control rod 77. The control rod 77 will rotate with the transmission sleeve 75, and the cam 63 will rotate through the transmission sleeve 75, and the ejection unit 6 will start to operate. The two carbon brush holders 51 are ejected from the assembly port 92 at the same time by the ejection unit 6, so that it is convenient for the operator to remove the carbon brush holder 51. The set locking unit 7 can not only fix the two carbon brush holders 51 at the same time, but also can eject the two carbon brush holders 51 at the same time when used in conjunction with the ejection unit 6, so that the carbon brush 52 can be replaced very conveniently, and when the control rod 77 is not locked, the rotating control cap 78 will not drive the transmission sleeve 75, which can effectively prevent the carbon brush holder 51 from being ejected due to misoperation, which is more reliable.

[0034] In this embodiment, marks, such as arrow marks, can be set on both the control cap 78 and the transmission sleeve 75. The mark on the control cap 78 corresponds to the mating block 771, and the mark on the transmission sleeve 75 corresponds to the L-shaped mating groove 751, which is convenient for the operator to align the mating block 771 with the L-shaped mating groove 751; at the same time, an angle mark is set on the installation port to facilitate the operator to determine the rotation angle.

[0035] Among them, Figure 11-13 As shown, a limiting rod 73 is provided at one end of the locking rod 72, and a compression spring 74 is sleeved on the outer wall of the limiting rod 73. The elastic force provided by the compression spring 74 enables the locking rod 72 to be stably inserted into the locking hole 513. After the control rod 77 is unlocked, the locking rod 72 can be driven back to its original position by the elastic force of the reset spring 79 and the compression spring 74.

[0036] Among them, Figure 11-13As shown, the ejection unit 6 includes a cam 63 which is sleeved and fixed outside the transmission sleeve 75, two movable plates 61 which are in contact with the cam 63, and at least two connecting springs 62 for connecting the movable plates 61. A guide groove is provided at one end of the movable plate 61, and an L-shaped transmission rod 64 is installed at the other end. Two ejector plates 65 are provided at the end of the L-shaped transmission rod 64 away from the movable plate 61.

[0037] The cam 63 is driven to rotate by the transmission sleeve 75. When the contact portion between the cam 63 and the movable plate 61 changes from the short end to the long end, the cam 63 pushes the movable plate 61 to move the two movable plates 61 away from each other. The movable plate 61 drives the top plate 65 with the help of the L-shaped transmission rod 64, and the carbon brush holder 51 is pushed out by the moving top plate 65.

[0038] In this embodiment, the two ends of the connecting spring 62 are respectively connected to the support column 93 and the movable plate 61. During the rotation of the cam 63, when the contact portion between the cam 63 and the movable plate 61 changes from the long end to the short end, the elastic force of the connecting spring 62 drives the movable plate 61 so that the movable plate 61 can always be in contact with the cam 63.

[0039] like Figure 1-5 As shown, the DC motor comprises a housing 8 for mounting the stator 2 and the above-mentioned DC motor assembly, the two ends of the housing 8 are respectively provided with an end cover 10 and an end cover 2 9, the end cover 2 9 is provided with an assembly port 92 for mounting the carbon brush holder 51, and the end cover 2 9 is further provided with a support bracket 91 for supporting the carbon brush holder 51, the support bracket 91 is provided with a long conductor 94 in contact with the bottom of the conductor 514, and the long conductor 94 is connected with a cable; the conduction of current is achieved through the long conductor 94 in contact with the bottom of the conductor 514; the assembly port 92 is used to assemble the carbon brush holder 51, and cooperates with the support bracket 91 capable of supporting the carbon brush holder 51 to position the carbon brush holder 51; The support bracket 91 is symmetrically provided with a positioning guide rod that slides with the positioning groove 512. The support bracket 91 is also provided with a through hole 95 that slides with the locking rod 72, and the two rotating shafts 4 are rotatably connected to the end cover 10 and the end cover 2 9 through bearings; the through hole 95 serves to guide the locking rod 72, which is conducive to aligning the locking rod 72 with the locking hole 513.

[0040] In this embodiment, the carbon brush holder 51 can be quickly assembled on the end cover 2 9 through the sliding cooperation between the positioning guide rod and the positioning slide groove 512 .

[0041] In this embodiment, a cable hole for leading out cables is provided on the second end cover 9 to facilitate wiring.

[0042] Among them, Figure 3 and Figure 4As shown, the end cover 2 9 is also provided with a mounting opening for installing a control rod, and the mounting opening is rotatably connected to the transmission sleeve 75 through a bearing, and the end cover 2 9 is also provided with two support columns 93 arranged face to face, and a guide rod 96 slidingly matched with the guide groove is provided between the two support columns 93, and a receiving hole for accommodating the limit rod 73 is also provided on the support column 93, and the compression spring 74 is located between the support column 93 and the movable rod 71; the compression spring 74 is squeezed by the support column 93 and the movable rod 71, and the locking rod 72 is stably inserted into the locking socket 513 through the elastic force of the compression spring 74, thereby improving the stability of the installation of the carbon brush holder 51.

[0043] In this embodiment, the accommodating hole can accommodate the limiting rod 73, providing space for the movement of the limiting rod 73; through the sliding cooperation of the guide rod 96 and the guide groove, the movable plate 61 can be guided to avoid the movement direction of the movable plate 61 from being offset, thereby enabling the ejection unit 6 to operate more stably.

[0044] During operation, the carbon brush 52 is installed into the second installation groove 516, and the insulating roller 58 is squeezed and moved into the third installation groove 517, so that the installation plate 57 drives the transmission bracket 55, and then the tension spring 56 is further stretched. At the same time, the insulating roller 58 will abut against the carbon brush 52 with the elastic force of the tension spring 56, and limit the carbon brush 52 from the side. The position of the adjusting plate 544 can be adjusted by rotating the adjusting screw 543, which can not only adjust the elastic force of the carbon brush spring 541, but also change the position of the carbon brush spring 541, which can effectively avoid the situation that the carbon brush 52 cannot maintain good contact with the commutator 3 due to the insufficient length of the carbon brush spring 541 after the carbon brush 52 is worn; The carbon brush holder 51 is installed from the assembly port 92, and then the control rod 77 is operated to insert the locking rod 72 into the locking socket 513 to complete the fixation of the carbon brush holder 51. When the carbon brush holder 51 needs to be removed, the control rod 77 is operated to disengage the locking rod 72 from the locking socket 513, and then the control rod 77 is locked. Then the control rod 77 is continued to be rotated, and the control rod 77 will rotate with the transmission sleeve 75, and the cam 63 is driven to rotate through the transmission sleeve 75, and the ejection unit 6 starts to operate, and the two carbon brush holders 51 are ejected from the assembly port 92 at the same time through the ejection unit 6, and then the operator can easily pull out the carbon brush holder 51.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A DC motor assembly, characterized in that: Including: A rotor (1) and a stator (2) arranged outside the rotor (1). Both ends of the rotor (1) are provided with rotating shafts (4), and a commutator (3) is sleeved outside one of the rotating shafts (4); A carbon brush unit (5), which is composed of a carbon brush holder (51), carbon brushes (52), a positioning structure for stabilizing the carbon brushes (52), and an elastic structure (54) for making the carbon brushes (52) contact the commutator (3). A locking insertion hole (513) is formed on the side surface of the carbon brush holder (51); A locking unit (7), including a control rod member and a movable rod (71). Locking insertion rods (72) inserted into the locking insertion holes (513) are provided at both ends of the movable rod (71); An ejecting unit (6) for ejecting the carbon brush holder (51).

2. The DC motor assembly according to claim 1, characterized in that: The positioning structure includes two transmission brackets (55) arranged face to face and a tension spring (56) for connecting the two transmission brackets (55). One end of the transmission bracket (55) is connected with a mounting plate (57). An insulating roller (58) for preventing the carbon brush (52) from shaking is rotatably arranged on the mounting plate (57). A relief groove (551) is formed at the bottom of the transmission bracket (55), and a T-shaped through hole is also formed on the transmission bracket (55).

3. The DC motor assembly according to claim 2, characterized in that: The elastic structure (54) includes an adjusting plate (544) and an adjusting screw rod (543) rotatably arranged on one side of the adjusting plate (544). A positioning guide post (542) is arranged on the other side of the adjusting plate (544), and a carbon brush spring (541) connected with the adjusting plate (544) is sleeved outside the positioning guide post (542).

4. The DC motor assembly according to claim 3, characterized in that: An installation groove one slidably matched with the adjusting plate (544) is formed on the carbon brush holder (51). A connection hole matched with the adjusting screw rod (543) is communicated at one end of the installation groove one. An installation groove two (516) for installing the carbon brush (52) is communicated at the other end of the installation groove one. Two installation grooves three (517) for accommodating the mounting plate (57) are communicated outside the installation groove two (516). A conductor (514) contacting the carbon brush (52) is embedded at the bottom of the installation groove two (516).

5. The DC motor assembly according to claim 4, characterized in that: A U-shaped groove (515) for installing the transmission bracket (55) is formed at the bottom of the carbon brush holder (51). The upper end of the U-shaped groove (515) is communicated with the installation groove two (516). Two groups of positioning sliding grooves (512) are communicated at the bottom of the U-shaped groove (515). A support guide rod (59) slidably matched with the T-shaped through hole is arranged in the U-shaped groove (515). The support guide rod (59) penetrates through the carbon brush holder (51), and limit stop blocks (591) are arranged at both ends of the support guide rod (59).

6. The DC motor assembly according to claim 1, characterized in that: The control rod member includes a control cap (78), a control rod (77) connected with the control cap (78), and a transmission sleeve (75) sleeved outside the control rod (77). 2N L-shaped fitting grooves (751) are formed at one end of the transmission sleeve (75). Fitting blocks (771) matched with the L-shaped fitting grooves (751) are symmetrically arranged on the outer wall of the control rod (77). An extrusion ring plate (76) is fixedly sleeved at one end of the control rod (77); A return spring (79) is sleeved on the outer wall of the control rod (77), and the return spring (79) is located between the transmission sleeve (75) and the extrusion ring plate (76). One end of the control rod (77) is rotatably connected to the movable rod (71) via a bearing.

7. The DC motor assembly according to claim 1, characterized in that: A limiting rod (73) is provided at one end of the locking rod (72), and a compression spring (74) is sleeved on the outer wall of the limiting rod (73).

8. The DC motor assembly according to claim 6, characterized in that: The ejection unit (6) comprises a cam (63) sleeved and fixed outside a transmission sleeve (75), two movable plates (61) in contact with the cam (63), and at least two connecting springs (62) for connecting the movable plates (61); a guide groove is provided at one end of the movable plate (61), and an L-shaped transmission rod (64) is installed at the other end; and two ejector plates (65) are provided at one end of the L-shaped transmission rod (64) away from the movable plate (61).

9. A DC motor, comprising a housing (8) for mounting a stator (2) and a DC motor assembly according to any one of claims 1 to 8, characterized in that: The two ends of the housing (8) are respectively provided with an end cover 1 (10) and an end cover 2 (9); the end cover 2 (9) is provided with an assembly opening (92) for mounting a carbon brush holder (51); the end cover 2 (9) is also provided with a support bracket (91) for supporting the carbon brush holder (51); the support bracket (91) is provided with a long conductor (94) in contact with the bottom of the conductor (514); and the long conductor (94) is connected with a cable; The support bracket (91) is symmetrically provided with positioning guide rods that are slidably matched with the positioning slide groove (512), and the support bracket (91) is also provided with a through hole (95) that is slidably matched with the locking plug rod (72), and the two rotating shafts (4) are rotatably connected to the end cover 1 (10) and the end cover 2 (9) respectively through bearings.

10. The DC motor according to claim 9, characterized in that: The second end cover (9) is also provided with an installation opening for installing a control rod, the installation opening is rotatably connected to the transmission sleeve (75) via a bearing, and the second end cover (9) is also provided with two support columns (93) arranged face to face, a guide rod (96) slidably engaged with the guide groove is provided between the two support columns (93), and a receiving hole for accommodating the limit rod (73) is also provided on the support column (93), and a compression spring (74) is located between the support column (93) and the movable rod (71).

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