Series excited motor convenient for replacing carbon brush

Abstract

The utility model discloses a series excited motor convenient to replace a carbon brush, which comprises a replacement mechanism and a carbon brush body arranged in the replacement mechanism, a cleaning mechanism is arranged at the bottom of the replacement mechanism, a spiral cleaning brush is arranged in the cleaning mechanism, and the replacement mechanism comprises a motor end cover. A first cleaning groove is formed in the inner side of the bottom of the motor end cover, mounting sleeves are symmetrically mounted on the two sides of the middle of the motor end cover, sliding rods are slidably connected into the mounting sleeves, a plurality of fixing holes are symmetrically formed in the tops and the bottoms of the sliding rods, and conductive cores are fixedly mounted in the sliding rods; by arranging the replacement mechanism, the arc-shaped groove of the carbon brush body can be always attached to the rotor of the motor by utilizing the elastic force effect of the connecting spring, and meanwhile, when the carbon brush body is abraded, sliding of the fixed insertion rod is realized by pressing the unlocking button, so that the carbon brush body is attached to the rotor, and the service life of the carbon brush body is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of series-excited motors, in particular to a series-excited motor which is convenient for replacing carbon brushes. Background Art

[0002] Single-phase series-excited motors are commonly known as series-excited motors or general-purpose motors. They are named because the excitation winding and the field winding are connected in series to work together. Single-phase series-excited motors are dual-purpose motors for AC and DC purposes. They can work with both AC and DC power supplies. Single-phase series-excited motors have high speed, small size, light weight, and convenient speed regulation. Therefore, they are used as power sources in most power tools. Carbon brushes are also called brushes. As a sliding contact, when the motor rotates, the electrical energy is transmitted to the coil through the commutator. Carbon brushes are easy to wear and need regular maintenance and replacement to ensure the normal use of the motor. Existing series-excited motors generally use a threaded structure to fix the carbon brushes, but the threaded structure fixing method is time-consuming, which makes the motor inconvenient to assemble and reduces production efficiency.

[0003] Publication No. CN216122160U discloses a series-excited motor that is convenient for replacing carbon brushes. By setting a limit groove and a limit rod, when the rotating rod slides in the sliding groove, it drives the rotating rod to rotate ninety degrees in the sliding groove, so that the clamping plate can rotate in the rotating groove to clamp the pipe cover to lock and release the pipe cover to remove the carbon brush. By setting a support arm, a clamping block and a clamping groove, each time the pipe cover is pressed, the support seat can drive the support arm to rotate, so that the clamping block slides in the clamping groove, so that the clamping block clamps the support seat and does not move, so as to keep the rotating rod fixed and realize the function of the push-type switch. However, the patent still has the following problems in actual use:

[0004] The series-excited motor, which is easy to replace the carbon brush, is provided with a limit groove and a limit rod, so that when the rotating rod slides in the sliding groove, it drives the rotating rod to rotate ninety degrees in the sliding groove, so that the clamping plate can be rotated in the rotating groove to clamp the tube cover to lock and loosen the tube cover to remove the carbon brush. However, the carbon brush will be worn to a certain extent during long-term use, and the powder generated by the wear of the carbon brush will fall into the inside of the motor end cover, which is not convenient for cleaning. At the same time, the carbon brush can be connected to the rotor through the connecting spring, but as the carbon brush wears, the elastic force of the spring will be weakened, so that the connection between the carbon brush and the rotor is not tight enough, which affects the current flowing from the power supply through the carbon brush into the rotor.

[0005] A series-excited motor with convenient carbon brush replacement is proposed to solve the above-mentioned problems. Utility Model Content

[0006] The purpose of the utility model is to provide a series-excited motor with easy replacement of carbon brushes, so as to solve the problem proposed in the above background technology that the carbon brushes will be worn to a certain extent during long-term use, and the powder generated by the wear of the carbon brushes will fall into the inside of the motor end cover, which is not convenient for cleaning. At the same time, the carbon brushes can be connected to the rotor through the connecting spring, but as the carbon brushes wear, the elastic force of the spring will weaken, so that the connection between the carbon brushes and the rotor is not tight enough, which affects the problem that the current flows from the power supply through the carbon brushes into the rotor.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a series-excited motor that is easy to replace carbon brushes, comprising a replacement mechanism, and a carbon brush body installed inside the replacement mechanism;

[0008] A cleaning mechanism is provided at the bottom of the replacement mechanism, and a spiral cleaning brush is provided inside the cleaning mechanism;

[0009] Also includes:

[0010] The replacement mechanism comprises a motor end cover, a first cleaning groove is provided on the inner side of the bottom of the motor end cover, and mounting sleeves are symmetrically installed on both sides of the middle part of the motor end cover;

[0011] Wherein, a sliding rod is slidably connected inside the mounting sleeve, and a plurality of fixing holes are symmetrically installed on the top and bottom of the sliding rod;

[0012] Wherein, a conductive core is fixedly installed inside the sliding rod, and a conductive sheet is fixedly connected to one side of the conductive core.

[0013] Preferably, a connecting spring is fixedly connected to the outer side of the conductive sheet, a connecting wire is arranged inside the connecting spring, the carbon brush body is fixedly connected to the connecting wire, the connecting wire is fixedly connected to the conductive sheet, the connecting spring is fixedly connected to the carbon brush body, and an arc groove is provided at the end of the carbon brush body.

[0014] Preferably, fixed blocks are fixedly installed on the top and bottom of the sliding rod, and the fixed block is rotatably connected to a rotating gear inside. Both sides of the rotating gear are meshingly connected with meshing racks, an unlocking button is fixedly connected to the top of the meshing rack on one side, and a fixed plug rod is fixedly connected to the bottom of the meshing rack on the other side.

[0015] Preferably, one end of the meshing rack away from the unlocking button and the fixed insert rod is fixedly connected with a return spring, a spring damper is arranged inside the return spring, and the fixed insert rod is snap-connected with the mounting sleeve through a fixing hole.

[0016] Preferably, the cleaning mechanism comprises a motor bottom cover, which is threadedly connected to the motor end cover, a second cleaning groove is provided on the inner side of the motor bottom cover, a through hole is provided at the inner center position of the motor bottom cover, and a rotating bearing is fixedly installed on the top of the through hole.

[0017] Preferably, the top of the rotating bearing is rotatably connected to a connecting sleeve, the inner periphery of the connecting sleeve is threadedly connected to a locking bolt, the outer side of the locking bolt is fixedly connected to a locking knob, and the end of the locking bolt away from the locking knob is rotatably connected to a locking block.

[0018] Preferably, the spiral cleaning brush is fixedly mounted on the bottom of the connecting sleeve near the locking bolt, the number of the spiral cleaning brushes is six, and the spiral cleaning brushes are closely connected to the bottom cover of the motor.

[0019] Compared with the prior art, the beneficial effects of the utility model are as follows: the series-excited motor that is easy to replace carbon brushes can not only utilize the elastic force of the connecting spring to make the arc groove of the carbon brush body always fit the rotor of the motor by setting the replacement mechanism, but also when the carbon brush body is worn, the sliding of the fixed plug rod can be realized by pressing the unlocking button, so that the carbon brush body and the rotor fit together, thereby improving the service life of the carbon brush body, and by setting the cleaning mechanism, not only can the second cleaning groove be used to collect the powder of the carbon brush body, but also the locking bolt can be driven to rotate inside the connecting sleeve by turning the locking knob, so that the locking blocks are close to each other, thereby fixing the output shaft of the motor, and the specific contents are as follows:

[0020] 1. By setting up the replacement mechanism, not only can the elastic force of the connecting spring be used to make the arc groove of the carbon brush body always fit the rotor of the motor, but also when the carbon brush body is worn, the meshing rack can be driven to rotate by pressing the unlocking button, and the sliding of the fixed plug rod can be realized by utilizing the meshing connection characteristics between the rotating gear and the meshing rack. When the fixed plug rod is separated from the fixed hole, the sliding rod can be pushed to slide inside the installation sleeve, so that the carbon brush body fits the rotor, thereby improving the service life of the carbon brush body;

[0021] 2. By setting up the cleaning mechanism, not only can the second cleaning groove be used to collect the powder of the carbon brush body, but also the locking bolt can be driven to rotate inside the connecting sleeve by turning the locking knob, so that the locking blocks are close to each other, thereby fixing the output shaft of the motor, and the output shaft is used to drive the spiral cleaning brush to rotate, so as to clean the powder inside the motor bottom cover. Under the action of the spiral cleaning brush, the powder is cleaned into the second cleaning groove, and the motor bottom cover is removed by taking advantage of the threaded connection between the motor bottom cover and the motor end cover, which is convenient for cleaning and collection of dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0023] Figure 2 It is a three-dimensional structural schematic diagram of the replacement mechanism in the utility model;

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the cross section of the installation sleeve in the utility model;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the cross section of the fixing block in the utility model;

[0026] Figure 5 It is a three-dimensional structural schematic diagram of the cleaning mechanism in the utility model;

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the connecting sleeve in the utility model.

[0028] In the figure: 1. replacement mechanism; 101. motor end cover; 102. first cleaning groove; 103. mounting sleeve; 104. sliding rod; 105. fixing hole; 106. conductive core; 107. conductive sheet; 108. connecting spring; 109. connecting wire; 110. carbon brush body; 111. arc groove; 112. fixing block; 113. rotating gear; 114. meshing rack; 115. unlocking button; 116. fixing plug rod; 117. reset spring; 118. spring damping; 2. cleaning mechanism; 201. motor bottom cover; 202. second cleaning groove; 203. through hole; 204. rotating bearing; 205. connecting sleeve; 206. locking bolt; 207. locking knob; 208. locking block; 209. spiral cleaning brush. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the implementation regulations described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-6The utility model provides a technical solution: a series-excited motor that is easy to replace carbon brushes, including a replacement mechanism 1, and a carbon brush body 110 installed inside the replacement mechanism 1, a cleaning mechanism 2 is arranged at the bottom of the replacement mechanism 1, and a spiral cleaning brush 209 is arranged inside the cleaning mechanism 2, the replacement mechanism 1 includes a motor end cover 101, a first cleaning groove 102 is opened on the inner side of the bottom of the motor end cover 101, and installation sleeves 103 are symmetrically installed on both sides of the middle part of the motor end cover 101, wherein the interior of the installation sleeve 103 is slidably connected to a sliding rod 104, and the top and bottom of the sliding rod 104 are symmetrically installed There are several fixing holes 105, wherein a conductive core 106 is fixedly installed inside the sliding rod 104, a conductive sheet 107 is fixedly connected to one side of the conductive core 106, a connecting spring 108 is fixedly connected to the outer side of the conductive sheet 107, a connecting wire 109 is arranged inside the connecting spring 108, a carbon brush body 110 is fixedly connected to the connecting wire 109, the connecting wire 109 is fixedly connected to the conductive sheet 107, the connecting spring 108 is fixedly connected to the carbon brush body 110, an arc groove 111 is provided at the end of the carbon brush body 110, and fixed The fixing block 112 is internally connected with a rotating gear 113, and both sides of the rotating gear 113 are meshed with meshing racks 114. The top of the meshing rack 114 on one side is fixedly connected with an unlocking button 115, and the bottom of the meshing rack 114 on the other side is fixedly connected with a fixed plug rod 116. The end of the meshing rack 114 away from the unlocking button 115 and the fixed plug rod 116 is fixedly connected with a return spring 117, and a spring damper 118 is arranged inside the return spring 117. The fixed plug rod 116 is engaged with the mounting sleeve 103 through the fixing hole 105. By setting the replacement machine Structure 1 can not only utilize the elastic force of the connecting spring 108 to make the arc groove 111 of the carbon brush body 110 always fit the rotor of the motor, but also when the carbon brush body 110 is worn, the meshing rack 114 is driven to rotate by pressing the unlocking button 115, and the sliding of the fixed rod 116 is realized by utilizing the characteristics of the meshing connection between the rotating gear 113 and the meshing rack 114. When the fixed rod 116 is separated from the fixing hole 105, the sliding rod 104 can be pushed to slide inside the mounting sleeve 103, so that the carbon brush body 110 fits the rotor, thereby improving the service life of the carbon brush body 110.

[0031] The cleaning mechanism 2 includes a motor bottom cover 201, which is threadedly connected to the motor end cover 101, a second cleaning groove 202 is provided on the inner side of the motor bottom cover 201, a through hole 203 is provided at the inner center of the motor bottom cover 201, a rotating bearing 204 is fixedly installed on the top of the through hole 203, a connecting sleeve 205 is rotatably connected to the top of the rotating bearing 204, a locking bolt 206 is threadedly connected to the inner periphery of the connecting sleeve 205, a locking knob 207 is fixedly connected to the outer side of the locking bolt 206, a locking block 208 is rotatably connected to the end of the locking bolt 206 away from the locking knob 207, a spiral cleaning brush 209 is fixedly installed on the bottom of the connecting sleeve 205 near the locking bolt 206, and the spiral cleaning brush 209 is fixedly installed on the bottom of the connecting sleeve 205 near the locking bolt 206. There are six of them, and the spiral cleaning brush 209 is closely connected to the motor bottom cover 201. By setting up the cleaning mechanism 2, not only can the second cleaning groove 202 be used to collect the powder of the carbon brush body 110, but also the locking bolt 206 is driven to rotate inside the connecting sleeve 205 by rotating the locking knob 207, so that the locking blocks 208 are close to each other, thereby fixing the output shaft of the motor, and the output shaft is used to drive the spiral cleaning brush 209 to rotate, so as to clean the powder inside the motor bottom cover 201. Under the action of the spiral cleaning brush 209, the powder is cleaned into the second cleaning groove 202. By utilizing the characteristic of the threaded connection between the motor bottom cover 201 and the motor end cover 101, the motor bottom cover 201 is removed, which is convenient for cleaning and collecting dust.

[0032] Working principle: Before using this series motor with easy replacement of carbon brushes, you need to check the overall condition of the device to make sure it can work normally. Figure 1 - Figure 6As shown, first, the motor bottom cover 201 is installed to the bottom of the motor end cover 101, and the locking knob 207 is turned to drive the locking bolt 206 to rotate inside the connecting sleeve 205, so that the locking blocks 208 are close to each other, thereby fixing the output shaft of the motor, and the output shaft is used to drive the spiral cleaning brush 209 to rotate, so as to clean the powder inside the motor bottom cover 201, and the powder is cleaned into the second cleaning groove 202 under the action of the spiral cleaning brush 209. The motor bottom cover 201 is removed by taking advantage of the threaded connection between the motor bottom cover 201 and the motor end cover 101, so as to facilitate the cleaning and collection of dust. Secondly, the elastic force of the connecting spring 108 is used to make the arc groove 110 of the carbon brush body 110 1 always fits the rotor of the motor so that the current flows from the power supply to the rotor through the carbon brush. Finally, when the carbon brush body 110 is worn, the meshing rack 114 is driven to rotate by pressing the unlocking button 115. The sliding of the fixed plug rod 116 is realized by utilizing the meshing connection between the rotating gear 113 and the meshing rack 114. When the fixed plug rod 116 is separated from the fixing hole 105, the sliding rod 104 can be pushed to slide inside the mounting sleeve 103, so that the carbon brush body 110 fits the rotor, thereby improving the service life of the carbon brush body 110. At the same time, the connecting spring 108 is re-compressed, thereby restoring the spring force, further fitting the carbon brush body 110 with the rotor, and improving the service life of the carbon brush body 110.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A series-excited motor with convenient carbon brush replacement, comprising a replacement mechanism (1), and a carbon brush body (110) installed inside the replacement mechanism (1); A cleaning mechanism (2) is provided at the bottom of the replacement mechanism (1), and a spiral cleaning brush (209) is provided inside the cleaning mechanism (2); It is characterized in that Also includes: The replacement mechanism (1) comprises a motor end cover (101), a first cleaning groove (102) is provided on the inner side of the bottom of the motor end cover (101), and mounting sleeves (103) are symmetrically mounted on both sides of the middle of the motor end cover (101); The installation sleeve (103) is internally slidably connected to a sliding rod (104), and a plurality of fixing holes (105) are symmetrically installed at the top and bottom of the sliding rod (104); A conductive core (106) is fixedly installed inside the sliding rod (104), and a conductive sheet (107) is fixedly connected to one side of the conductive core (106).

2. The series-excited motor with easy-to-replace carbon brush according to claim 1, characterized in that: A connecting spring (108) is fixedly connected to the outer side of the conductive sheet (107), a connecting wire (109) is arranged inside the connecting spring (108), the carbon brush body (110) is fixedly connected to the connecting wire (109), the connecting wire (109) is fixedly connected to the conductive sheet (107), the connecting spring (108) is fixedly connected to the carbon brush body (110), and an arc groove (111) is provided at the end of the carbon brush body (110).

3. A series-excited motor with easy replacement of carbon brushes according to claim 2, characterized in that: The top and bottom of the sliding rod (104) are fixedly mounted with a fixed block (112), the interior of the fixed block (112) is rotatably connected to a rotating gear (113), both sides of the rotating gear (113) are meshingly connected to meshing racks (114), the top of the meshing rack (114) on one side is fixedly connected to an unlocking button (115), and the bottom of the meshing rack (114) on the other side is fixedly connected to a fixed insertion rod (116).

4. The series-excited motor with easy-to-replace carbon brushes according to claim 3, characterized in that: One end of the meshing rack (114) away from the unlocking button (115) and the fixed insertion rod (116) is fixedly connected to a return spring (117), a spring damper (118) is arranged inside the return spring (117), and the fixed insertion rod (116) is snap-connected with the installation sleeve (103) through the fixing hole (105).

5. The series-excited motor with easy-to-replace carbon brushes according to claim 1, characterized in that: The cleaning mechanism (2) comprises a motor bottom cover (201), the motor bottom cover (201) being threadedly connected to the motor end cover (101), a second cleaning groove (202) being provided on the inner side of the motor bottom cover (201), a through hole (203) being provided at the inner center position of the motor bottom cover (201), and a rotating bearing (204) being fixedly mounted on the top of the through hole (203).

6. A series-excited motor with easy-to-replace carbon brushes according to claim 5, characterized in that: The top of the rotating bearing (204) is rotatably connected to a connecting sleeve (205), the inner periphery of the connecting sleeve (205) is threadedly connected to a locking bolt (206), the outer side of the locking bolt (206) is fixedly connected to a locking knob (207), and the end of the locking bolt (206) away from the locking knob (207) is rotatably connected to a locking block (208).

7. A series-excited motor with easy-to-replace carbon brushes according to claim 6, characterized in that: The spiral cleaning brush (209) is fixedly mounted on the bottom of the connecting sleeve (205) near the locking bolt (206), the number of the spiral cleaning brushes (209) is six, and the spiral cleaning brushes (209) are closely connected to the motor bottom cover (201).

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