Commutator sleeve and commutator tightening structure for Z450 direct current motor

Abstract

The invention relates to the technical field of commutators, and discloses a commutator sleeve for a Z450 direct current motor and a commutator tightening structure, the commutator sleeve comprises a commutator main body, the commutator main body comprises a commutator sleeve, a commutator front pressing ring, a commutator mica ring and commutator segments, and the commutator segments are arranged on the outer ring of the commutator sleeve in a sleeving manner. The commutator front pressing ring is located on the back face of the commutator sleeve, the commutator mica ring is located at the joint of the commutator segment assembly and the commutator sleeve and the commutator front pressing ring, and the commutator sleeve is internally provided with ventilation holes and combining holes which are the same in number. By designing the air duct, the structure of the associated part of the commutator main body and the shaft is convenient to ventilate, high in lightness and capable of bearing large torque, the combining hole and the ventilation hole are formed in the commutator sleeve, the ventilation area of the commutator main body is increased, heat dissipation of a motor is more facilitated, and meanwhile, the commutator is made of forge pieces and has the advantages of being high in strength and easy to machine.

Description

Technical Field

[0001] The invention relates to the technical field of commutators, in particular to a commutator sleeve and a commutator tightening structure for a Z450 DC motor. Background Art

[0002] The commutator sleeve is an important component of the commutator, which plays the role of supporting and fixing the commutator.

[0003] The commutator is a key component unique to DC motors. In order to ensure commutation performance and operational reliability, it must be carefully designed and manufactured, and must also be carefully maintained during operation. During operation, the commutator must have no eccentricity, convex pieces or oval shapes, and a smooth surface with a thin layer of light brown oxide film to ensure smooth sliding contact with the brushes and a high contact voltage drop.

[0004] DC motors often operate in humid and polluted environments, especially in industries such as metallurgy and mining. A loose commutator can lead to poor commutation, sparks between the brushes and the commutator segments, and can also cause motor vibration or unstable operation.

[0005] Reasonable commutator sleeve structure design and commutator grip structure design can effectively prevent commutator loosening, convex pieces, etc., reduce the possibility of sparks and reduce mechanical vibration.

[0006] Therefore, in view of the above problems, we propose a commutator sleeve and a commutator clamping structure for a Z450 DC motor. Summary of the invention

[0007] 1. Technical issues to be solved

[0008] The present invention designs an air duct on a commutator sleeve and a commutator clamping structure for a Z450 DC motor, so that the structure at the connection between the commutator body and the shaft is easy to ventilate, light and high, and can withstand large torque. The commutator sleeve is provided with a clamping hole and a ventilation hole to increase the ventilation area at the commutator body, which is more conducive to the heat dissipation of the motor. At the same time, the commutator material adopts a forging, which has the advantages of high strength and easy processing, and solves the problem that the DC motor often runs in a humid and polluted environment, especially in the metallurgy, mining and other industries, and the loose commutator will lead to poor commutation, sparks between the brush and the commutator segment, and also cause vibration or unstable operation of the motor.

[0009] (II) Technical solution

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a commutator sleeve and a commutator clamping structure for a Z450 DC motor, comprising a commutator body, wherein the commutator body comprises a commutator sleeve, a commutator front pressure ring, a commutator mica ring and a commutator segment assembly, wherein the commutator segment assembly is set on the outer ring of the commutator sleeve, the commutator front pressure ring is located on the back of the commutator sleeve, and the commutator mica ring is located at the connection between the commutator segment assembly and the commutator sleeve and the commutator front pressure ring, and the commutator sleeve is provided with the same number of ventilation holes and clamping holes, wherein the ventilation holes and the clamping holes are distributed in a circle around the commutator sleeve and are distributed at intervals.

[0011] The commutator sleeve comprises a commutator sleeve forging and a steel block, wherein the steel block is welded to the commutator sleeve forging, and a cylindrical pin is driven between the steel block and the commutator front pressing ring for positioning.

[0012] A screw rod passes through the handle hole, a through hole for the screw rod to pass through is opened inside the commutator front pressure ring, nuts are threadedly connected at both ends of the screw rod, and an outer tongue stop washer is also sleeved on the end of the screw rod close to the commutator front pressure ring, wherein the outer tongue stop washer is located between the nut and the commutator front pressure ring.

[0013] One side of the commutator body is located inside the DC motor and an armature core and an air guide ring are sequentially distributed thereon. A rotating shaft is arranged in the middle of the armature core, and an air duct is provided between the commutator body and the armature core.

[0014] The stop diameter of the commutator sleeve (1) is smaller than the sum of the distribution diameter of the tightening screw (6) and the e value of the nut (7), but larger than the sum of the distribution diameter of the tightening screw (6) and the s value of the nut (7). The nut (7) is first screwed into the tightening screw (6) and then brought into the stop along with the tightening screw (6) and stuck at the stop.

[0015] (III) Beneficial effects

[0016] The present invention provides a commutator sleeve and a commutator tightening structure for a Z450 DC motor, which has the following beneficial effects:

[0017] 1. The present invention designs an air duct on a commutator sleeve and a commutator clamping structure for a Z450 DC motor, so that the structure at the connection between the commutator body and the shaft is easy to ventilate, light and high, and can withstand large torque.

[0018] 2. The present invention designs engagement holes and ventilation holes on a commutator sleeve and a commutator clamping structure for a Z450 DC motor, thereby increasing the ventilation area at the commutator body, which is more conducive to the heat dissipation of the motor. At the same time, the commutator material is forged, which has higher strength and is easier to process than castings.

[0019] 3. The present invention designs a commutator sleeve and a commutator tightening structure for a Z450 DC motor so that the diameter of the stop on one side of the commutator sleeve is smaller than the distribution diameter of the tensioning screw + the size of the nut e, so that the nut can be effectively stuck at the stop to prevent the nut from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the commutator sleeve of the present invention;

[0021] Figure 2 It is a cross-sectional schematic diagram of the commutator sleeve AA of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the commutator of the present invention;

[0023] Figure 4 It is a cross-sectional schematic diagram of the commutator CC of the present invention;

[0024] Figure 5 It is a cross-sectional schematic diagram of the commutator BB of the present invention;

[0025] Figure 6 It is a schematic diagram of the armature structure of the present invention;

[0026] Figure 7 It is a schematic diagram of the size structure of the nut of the present invention.

[0027] In the figure: 1. Commutator sleeve forging; 2. Steel block; 3. Commutator sleeve; 4. Commutator front pressure ring; 5. Commutator segment assembly; 6. Screw; 7. Nut; 8. External tongue stop washer; 9. Cylindrical pin; 10. Commutator body; 11. Armature core; 12. Air guide ring; 13. Commutator mica ring; 14. Air duct; 15. Rotating shaft. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1:

[0030] See also Figure 1-7A commutator sleeve and commutator clamping structure for a Z450 DC motor, including a commutator body 10, the commutator body 10 includes a commutator sleeve 3, a commutator front pressure ring 4, a commutator mica ring 13 and a commutator segment assembly 5, wherein the commutator segment assembly 5 is sleeved on the outer ring of the commutator sleeve 3, the commutator front pressure ring 4 is located on the back of the commutator sleeve 3, and the commutator mica ring 13 is located at the connection between the commutator segment assembly 5 and the commutator sleeve 3 and the commutator front pressure ring 4, and the commutator sleeve 3 is provided with the same number of ventilation holes and clamping holes, wherein the ventilation holes and the clamping holes are distributed in a circle around the commutator sleeve 3 and are distributed at intervals.

[0031] During specific use: the commutator sleeve 3 and the commutator front pressure ring 4, the commutator mica ring 13, the commutator segment assembly 5 and other main components are tightened into a whole through the screw 6, the nut 7, and the outer tongue stop washer 8 to form a commutator body 10, and 11 engagement holes and ventilation holes are distributed on the contact surface between the nut 7 and the commutator sleeve 3, among which the 11 engagement holes are used for installing the screw 6, and the ventilation holes serve as part of the armature air path.

[0032] The stop diameter of the commutator sleeve 1 is smaller than the sum of the distribution diameter of the tightening screw 6 and the nut 7e value, but larger than the sum of the distribution diameter of the tightening screw 6 and the nut 7s value. The nut 7 is first screwed into the tightening screw 6 and then brought into the stop with the tightening screw 6 and stuck at the stop.

[0033] In this embodiment: the commutator sleeve 3 includes a commutator sleeve forging 1 and a steel block 2, wherein the steel block 2 is welded to the commutator sleeve forging 1, and a cylindrical pin 9 is driven between the steel block 2 and the commutator front pressure ring 4 for positioning.

[0034] When used specifically: the steel block 2 is welded on the commutator sleeve forging 1 to drive in the cylindrical pin 9, which is used to position the commutator front pressure ring 4 and the commutator sleeve 3. The commutator sleeve 3 is made by welding the steel block 2 to the commutator sleeve forging 1 and then fine-machining. The commutator sleeve forging 1 is made of 20SiMn, first forged into a cylindrical structure, and then wire cut to cut out the required crescent shape.

[0035] In this embodiment: a screw rod 6 passes through the inside of the engagement hole, a through hole for the screw rod 6 to pass through is opened inside the commutator front pressure ring 4, both ends of the screw rod 6 are threadedly connected with nuts 7, and an outer tongue stop washer 8 is also sleeved on the end of the screw rod 6 close to the commutator front pressure ring 4, wherein the outer tongue stop washer 8 is located between the nut 7 and the commutator front pressure ring 4.

[0036] When in use, the commutator sleeve 3, the commutator front pressure ring 4, the commutator mica ring 13, the commutator segment assembly 5 and other main parts are tightened into a whole through the screw 6, the nut 7, and the outer tongue stop washer 8 to form a commutator body 10.

[0037] In this embodiment: one side of the commutator body 10 is located inside the DC motor, and an armature core 11 and an air guide ring 12 are sequentially distributed thereon. A rotating shaft 15 is arranged in the middle of the armature core 11 , and an air duct 14 is opened between the commutator body 10 and the armature core 11 .

[0038] During specific use: the ventilation holes and the air guide ring 12, the ventilation duct in the armature core 11, the air duct 14 between the commutator sleeve 3 and the rotating shaft 15, and the air duct 14 between the commutator lifting plates together serve as part of the armature air path, increasing the area of ​​the armature air outlet part, which is helpful for heat dissipation of the armature core 11 and the commutator body 10.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A commutator sleeve and commutator clamping structure for a Z450 DC motor, comprising a commutator body (10), characterized in that: The commutator body (10) comprises a commutator sleeve (3), a commutator front pressure ring (4), a commutator mica ring (13) and a commutator segment assembly (5), wherein the commutator segment assembly (5) is sleeved on the outer ring of the commutator sleeve (3), the commutator front pressure ring (4) is located on the back of the commutator sleeve (3), and the commutator mica ring (13) is located at the connection between the commutator segment assembly (5) and the commutator sleeve (3) and the commutator front pressure ring (4), and the commutator sleeve (3) is provided with the same number of ventilation holes and handle holes, wherein the ventilation holes and handle holes are distributed in a circular shape around the commutator sleeve (3) and are distributed at intervals.

2. The commutator sleeve and commutator clamping structure for a Z450 DC motor according to claim 1, characterized in that: The commutator sleeve (3) comprises a commutator sleeve forging (1) and a steel block (2), wherein the steel block (2) is welded to the commutator sleeve forging (1), and a cylindrical pin (9) is driven between the steel block (2) and the commutator front pressure ring (4) for positioning.

3. The commutator sleeve and commutator clamping structure for a Z450 DC motor according to claim 1, characterized in that: A screw rod (6) passes through the handle hole, a through hole for the screw rod (6) to pass through is provided inside the commutator front pressure ring (4), nuts (7) are threadedly connected to both ends of the screw rod (6), and an outer tongue stop washer (8) is also sleeved on one end of the screw rod (6) close to the commutator front pressure ring (4), wherein the outer tongue stop washer (8) is located between the nut (7) and the commutator front pressure ring (4).

4. The commutator sleeve and commutator clamping structure for a Z450 DC motor according to claim 1, characterized in that: One side of the commutator body (10) is located inside the DC motor and has an armature core (11) and an air guide ring (12) distributed in sequence. A rotating shaft (15) is arranged in the middle of the armature core (11). An air duct (14) is provided between the commutator body (10) and the armature core (11).

5. The commutator sleeve and commutator clamping structure for a Z450 DC motor according to claim 1, characterized in that: The stop diameter of the commutator sleeve (1) is smaller than the sum of the distribution diameter of the tightening screw (6) and the e value of the nut (7), but larger than the sum of the distribution diameter of the tightening screw (6) and the s value of the nut (7). The nut (7) is first screwed into the tightening screw (6) and then brought into the stop along with the tightening screw (6) and stuck at the stop.

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