Direct current motor with easy disassembly

Abstract

The utility model relates to direct current speed reduction motor dismantling technical field, concretely is a kind of direct current speed reduction motor of convenient dismounting, including direct current speed reduction motor main body, the front cover and back cover are respectively installed in the front and rear ends of direct current speed reduction motor main body, the outer ring of direct current speed reduction motor main body is fixed with positioning ring, and multiple sets of positioning holes are arranged on the surface of positioning ring;Beneficial effects are that: by first fixed link and second fixed link pass through positioning hole, the screw joint sleeve of first fixed link bottom end is screwed into the screw joint groove of second fixed link bottom end, and the connecting nut on the groove is screwed to the bottom outer ring of second fixed link, the shape of the convex groove in second fixed link, the screw joint sleeve is fixed, to effectively connect first fixed link and second fixed link, so that the front cover and back cover are connected, when dismounting, only need to unscrew fastening nut and connecting nut, then screw joint sleeve is screwed out from screw joint groove, the front cover and back cover can be dismounted.

Description

Technical Field

[0001] This utility model relates to the field of DC geared motor disassembly, specifically a DC geared motor that is easy to disassemble. Background Technology

[0002] A DC geared motor consists of a housing, front cover, rear cover, stator, rotor, carbon brushes, output shaft, and gearbox. The rotor is composed of armature windings, a commutator, and a shaft, while the gearbox is composed of a gear set and a gear carrier. The DC current flowing through the armature windings generates electromagnetic torque in the fixed magnetic field formed by the permanent magnets in the stator, driving the rotor and shaft to rotate at high speed. The high-speed, low-torque rotation is then converted into low-speed, high-torque output through a multi-stage reduction gear set connected to the shaft, thus achieving power transmission and speed regulation. The entire process relies on the close cooperation of components such as the motor housing, end covers, carbon brush assembly, and gearbox to convert electrical energy into mechanical energy and output stable torque.

[0003] The front and rear covers are located at both ends of the housing, while the remaining components are located inside the housing. During disassembly, only the front and rear covers need to be removed to take out the internal components. The output shaft passes through the front cover to transmit the internal power.

[0004] However, in the existing technology, disassembling a DC geared motor involves removing the front and rear end covers to take out the internal components. However, the traditional front and rear covers cannot be removed at the same time. After removing the front or rear cover, the rear or front cover must be removed, resulting in low work efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a DC geared motor that is easy to disassemble, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: it includes a DC geared motor body, with a front cover and a rear cover respectively installed at the front and rear ends of the DC geared motor body. A positioning ring is fixed on the outer ring of the DC geared motor body, and multiple sets of positioning holes are opened on the surface of the positioning ring. The positioning holes penetrate the side walls of the front cover and the rear cover. Multiple sets of first fixing rods are inserted into the multiple sets of positioning holes, and multiple sets of second fixing rods are inserted into the surface of the front cover. The multiple sets of first fixing rods and the multiple sets of second fixing rods are connected by a connecting structure.

[0007] Preferably, the right surface of the positioning ring is attached to the left surface of the rear cover, the first fixing rod passes through the rear cover, the first fixing rod passes through the positioning hole of the front cover side panel, the second fixing rod passes through the positioning hole of the rear cover side panel, and the diameter of the positioning hole of the rear cover is smaller than the diameter of the positioning hole of the front cover.

[0008] Preferably, fixing plates are respectively fixed on top ends of the first fixing rod and the second fixing rod, a diameter of the fixing plate is larger than a diameter of the corresponding fixing rod, a diameter of the first fixing rod is larger than a diameter of the second fixing rod, and a diameter of a positioning hole on the rear cover is equal to the diameter of the second fixing rod.

[0009] Preferably, a plurality of groups of said first fixing rods and second fixing rods are arranged in a circumferential array around a central shaft of the DC gear motor main body.

[0010] Preferably, the connecting structure comprises a screw coupling sleeve, a groove, a connecting nut and a fastening nut, the screw coupling sleeve is fixed at the bottom end of the first fixing rod, the groove is formed on an outer ring of the first fixing rod and is located at the bottom end of the first fixing rod, a bottom end of the groove is in contact with a top end of the screw coupling sleeve, inner rings of the connecting nut and the fastening nut are screwed on the groove, the inner ring of the connecting nut is of a convex structure, a convex groove of the connecting nut is screwed on the inner ring of the groove, a bottom groove of the connecting nut is screwed with an outer ring of the bottom end of the second fixing rod, when the first fixing rod and the second fixing rod are connected, an outer ring of the screw coupling sleeve is screwed in a screw groove formed at the bottom end of the second fixing rod, a height of the screw groove is equal to a height of the screw coupling sleeve, a top end of the bottom groove of the connecting nut is in contact with the bottom end of the second fixing rod, both the connecting nut and the fastening nut are hexagonal nuts, the fastening nut is in contact with the connecting nut, and the maximum dimension of the end faces of the connecting nut and the fastening nut is smaller than a diameter of the positioning hole.

[0011] Compared with the prior art, the beneficial effects of the present utility model are: In the DC gear motor that is easy to disassemble proposed by the present utility model, the DC gear motor is disassembled, that is, the front end cover and the rear end cover of the DC gear motor are disassembled, so that internal components can be taken out. However, the conventional front cover and rear cover cannot be disassembled at the same time, resulting in low working efficiency. In the present utility model, the first fixing rod and the second fixing rod pass through the positioning holes, the screw coupling sleeve at the bottom end of the first fixing rod is screwed into the screw groove formed at the bottom end of the second fixing rod, the connecting nut on the groove is screwed onto the outer ring of the bottom end of the second fixing rod, the screw coupling sleeve is fixed through the convex groove shape inside the second fixing rod, thereby effectively connecting the first fixing rod and the second fixing rod together, so that the front cover and the rear cover are connected together. When disassembling, it is only necessary to unscrew the fastening nut and the connecting nut, then unscrew the screw coupling sleeve out of the screw groove, and then the front cover and the rear cover can be disassembled. Description of Drawings Figure 1 is an overall structural schematic diagram of the present utility model; Figure 2 is a schematic diagram of the Figure 1 disassembly structure of the front cover and the rear cover of the present utility model; Figure 3 is a structural schematic diagram of the first fixing rod and the second fixing rod of the present utility model; Figure 4 is a top-view structural schematic diagram Figure 3 of the present utility model; Figure 5 This utility model Figure 4 Schematic diagram of the cross-sectional structure along the central AA direction; Figure 6 This utility model Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a schematic diagram of the connecting nut structure of this utility model.

[0012] In the diagram: 1. DC geared motor body; 2. Front cover; 3. Rear cover; 4. Positioning ring; 5. Positioning hole; 6. First fixing rod; 7. Threaded sleeve; 8. Groove; 9. Second fixing rod; 10. Threaded groove; 11. Connecting nut; 12. Fastening nut. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0014] Example 1 Please see Figures 1-7 This utility model provides a technical solution: a DC geared motor that is easy to disassemble, including a DC geared motor body 1, a front cover 2 and a rear cover 3 respectively installed at the front and rear ends of the DC geared motor body 1, a positioning ring 4 fixed on the outer ring of the DC geared motor body 1, and multiple sets of positioning holes 5 opened on the surface of the positioning ring 4, and the positioning holes 5 penetrate through the side of the front cover 2 and the rear cover 3. Specifically, refer to Figure 1 and Figure 2 It can be seen that the main body 1 of the DC geared motor consists of a shell, a front cover 2, a rear cover 3, a stator, a rotor, carbon brushes, an output shaft, and a gearbox. The rear cover 3 contains carbon brushes and brush holder assemblies, which are in contact with the commutator at the tail end of the rotor and conduct electricity. Current enters the rotor winding through the carbon brushes and generates electromagnetic torque in the fixed magnetic field provided by the permanent magnet of the stator, driving the rotor and the shaft mounted on it to rotate at high speed. The rotational power is transmitted to the gearbox closely connected to the front through the output shaft. The gearbox is equipped with a multi-stage gear set and gear carrier to convert the high-speed, low-torque force of the rotor into a low-speed, high-torque output. The gearbox is installed inside the front cover 2 of the motor housing. The front cover 2 and the rear cover 3 are located at both ends of the shell, covering the internal components. When disassembling, only the front cover 2 and the rear cover 3 need to be removed to take out the internal components. It is further described that the rotor is composed of an armature winding, a commutator and a rotating shaft, the reduction gearbox is composed of a gear set and a gear carrier, the armature winding is mounted on the rotating shaft and connected to the commutator, current enters the winding through carbon brushes and the commutator, generates electromagnetic torque in the fixed magnetic field provided by the permanent magnet of the stator, and drives the rotating shaft to rotate. The front end of the rotating shaft is connected to the gear set in the reduction gearbox, the interior of the reduction gearbox is composed of multi-stage gear sets and a gear carrier, the power of the rotating shaft is first transmitted to the input gear, then undergoes multi-stage meshing speed reduction in the gear carrier, and finally outputs power with low rotation speed and high torque through the output shaft.

[0015] Second Embodiment Based on the first embodiment, in order to realize simultaneous disassembly and assembly of the front cover 2 and the rear cover 3, the present embodiment provides that a plurality of sets of first fixing rods 6 are respectively inserted into a plurality of sets of positioning holes 5, and a plurality of sets of second fixing rods 9 are inserted into the surface of the front cover 2. The right surface of the positioning ring 4 is attached to the left surface of the rear cover 3, the first fixing rods 6 penetrate the rear cover 3, and the first fixing rods 6 penetrate the positioning holes 5 in the side wall of the front cover 2; the second fixing rods 9 penetrate the positioning holes 5 in the side wall of the rear cover 3, and the diameter of the positioning holes 5 of the rear cover 3 is smaller than that of the positioning holes 5 of the front cover 2. Fixing plates are respectively fixed at the top ends of the first fixing rods 6 and the second fixing rods 9, and the diameter of each fixing plate is larger than that of the corresponding fixing rod; the diameter of the first fixing rods 6 is larger than that of the second fixing rods 9, and the diameter of the positioning holes 5 of the rear cover 3 is equal to that of the second fixing rods 9. The plurality of sets of first fixing rods 6 and the plurality of sets of second fixing rods 9 are all arranged in a circumferential array along the central axis of the DC gear motor main body 1, the plurality of sets of first fixing rods 6 and the plurality of sets of second fixing rods 9 are connected through a connecting structure, and the connecting structure comprises a screw connecting sleeve 7, a groove 8, a connecting nut 11 and a fastening nut 12. The screw connecting sleeve 7 is fixed at the bottom end of the first fixing rod 6, the groove 8 is opened on the outer ring of the first fixing rod 6 and located at the bottom end of the first fixing rod 6, and the bottom end of the groove 8 is in contact with the top end of the screw connecting sleeve 7; the inner rings of the connecting nut 11 and the fastening nut 12 are screwed into the groove 8, the inner ring of the connecting nut 11 is of a convex-shaped structure, the convex groove of the connecting nut 11 is screwed into the inner ring of the groove 8, and the bottom groove of the connecting nut 11 is screwed with the outer ring of the bottom end of the second fixing rod 9. When the first fixing rod 6 and the second fixing rod 9 are connected, the outer ring of the screw connecting sleeve 7 is screwed into the screw connecting groove 10 opened at the bottom end of the second fixing rod 9, the height of the screw connecting groove 10 is equal to that of the screw connecting sleeve 7, and the top end of the bottom groove of the connecting nut 11 is in contact with the bottom end of the second fixing rod 9; the connecting nut 11 and the fastening nut 12 are both hexagon nuts, the fastening nut 12 is in contact with the connecting nut 11, and the maximum end face dimension of the connecting nut 11 and the fastening nut 12 is smaller than the diameter of the positioning hole 5; Specifically, the DC geared motor 1 is disassembled, which means removing the front and rear end covers of the DC geared motor, namely the front cover 2 and the rear cover 3, to remove the internal components. However, the traditional front cover 2 and rear cover 3 cannot be disassembled simultaneously, resulting in low work efficiency. The first fixing rod 6 and the second fixing rod 9 pass through the positioning hole 5, and the screw sleeve 7 at the bottom of the first fixing rod 6 is screwed into the screw groove 10 opened at the bottom of the second fixing rod 9, as shown in the reference... Figure 5 and Figure 6 It can be seen that the connecting nut 11 on the groove 8 is screwed to the bottom outer ring of the second fixing rod 9. The convex shape inside the second fixing rod 9 fixes the screw sleeve 7. Then, the fastening nut 12 provides a pre-tightening force to the connecting nut 11, making it difficult for the connecting nut 11 to fall off freely. Thus, the first fixing rod 6 and the second fixing rod 9 are effectively connected, so that the front cover 2 and the rear cover 3 are connected. When disassembling, it is only necessary to unscrew the fastening nut 12 and the connecting nut 11, and then screw the screw sleeve 7 out from the screw groove 10 to remove the front cover 2 and the rear cover 3.

[0016] In use, the DC geared motor 1 is disassembled, that is, the front and rear end covers of the DC geared motor, namely the front cover 2 and the rear cover 3, are removed to take out the internal components. However, the traditional front cover 2 and rear cover 3 cannot be disassembled at the same time, resulting in low work efficiency. By passing through the positioning hole 5 with the first fixing rod 6 and the second fixing rod 9, the first fixing rod 6 is fixed in position by the positioning ring 4 to prevent the front cover 2 and the rear cover 3 from moving at any time. The screw sleeve 7 at the bottom of the first fixing rod 6 is screwed into the screw groove 10 opened at the bottom of the second fixing rod 9, as shown in the figure. Figure 5 and Figure 6 It can be seen that the connecting nut 11 on the groove 8 is screwed to the bottom outer ring of the second fixing rod 9. The convex shape inside the second fixing rod 9 fixes the screw sleeve 7. Then, the fastening nut 12 provides a pre-tightening force to the connecting nut 11, making it difficult for the connecting nut 11 to fall off freely. Thus, the first fixing rod 6 and the second fixing rod 9 are effectively connected, so that the front cover 2 and the rear cover 3 are connected. When disassembling, it is only necessary to unscrew the fastening nut 12 and the connecting nut 11, and then screw the screw sleeve 7 out from the screw groove 10 to remove the front cover 2 and the rear cover 3.

[0017] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A DC geared motor that is easy to disassemble, comprising a DC geared motor body (1), wherein a front cover (2) and a rear cover (3) are respectively installed at the front and rear ends of the DC geared motor body (1), characterized in that: A positioning ring (4) is fixed on the outer ring of the DC gear motor main body (1), a plurality of groups of positioning holes (5) are formed on the surface of the positioning ring (4), the positioning holes (5) penetrate through the side walls of the front cover (2) and the rear cover (3), a plurality of groups of first fixing rods (6) are respectively inserted into the plurality of groups of positioning holes (5), a plurality of groups of second fixing rods (9) are inserted into the surface of the front cover (2), and the plurality of groups of first fixing rods (6) and the plurality of groups of second fixing rods (9) are connected through a connecting structure.

2. The DC geared motor with easy disassembly according to claim 1, characterized in that: The right surface of the positioning ring (4) is attached to the left surface of the rear cover (3), the first fixing rod (6) penetrates through the rear cover (3), the first fixing rod (6) penetrates through the positioning hole (5) in the side wall of the front cover (2), the second fixing rod (9) penetrates through the positioning hole (5) in the side wall of the rear cover (3), and the diameter of the positioning hole (5) of the rear cover (3) is smaller than that of the positioning hole (5) of the front cover (2).

3. A DC geared motor that is easy to disassemble according to claim 2, characterized in that: Fixing plates are respectively fixed at the top ends of the first fixing rod (6) and the second fixing rod (9), the diameter of each fixing plate is larger than that of the corresponding fixing rod, the diameter of the first fixing rod (6) is larger than that of the second fixing rod (9), and the diameter of the positioning hole (5) of the rear cover (3) is equal to that of the second fixing rod (9).

4. A DC geared motor that is easy to disassemble according to claim 1, characterized in that: The plurality of groups of the first fixing rods (6) and the second fixing rods (9) are all circumferentially arrayed around the central shaft of the DC gear motor main body (1).

5. A DC geared motor that is easy to disassemble according to claim 1, characterized in that: The connecting structure comprises a threaded sleeve (7), a groove (8), a connecting nut (11) and a fastening nut (12), the threaded sleeve (7) is fixed at the bottom end of the first fixing rod (6), the groove (8) is formed in the outer ring of the first fixing rod (6) and located at the bottom end of the first fixing rod (6), the bottom end of the groove (8) is in contact with the top end of the threaded sleeve (7), the inner rings of the connecting nut (11) and the fastening nut (12) are threaded in the groove (8), the inner ring of the connecting nut (11) is of a convex-shaped structure, the convex groove of the connecting nut (11) is threaded in the inner ring of the groove (8), the bottom groove of the connecting nut (11) is threaded with the outer ring of the bottom end of the second fixing rod (9), when the first fixing rod (6) and the second fixing rod (9) are connected, the outer ring of the threaded sleeve (7) is threaded in a threaded groove (10) formed at the bottom end of the second fixing rod (9), the height of the threaded groove (10) is equal to that of the threaded sleeve (7), the top end of the bottom groove of the connecting nut (11) is in contact with the bottom end of the second fixing rod (9), both the connecting nut (11) and the fastening nut (12) are hexagonal nuts, the fastening nut (12) is in contact with the connecting nut (11), and the maximum end dimension of the connecting nut (11) and the fastening nut (12) is smaller than the diameter of the positioning hole (5).

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