Commutator, motor and tool

Abstract

The present invention discloses a commutator, a motor and a tool. The commutator includes: an insulating substrate; a commutator segment, wherein the commutator segment is arranged on the periphery of the insulating substrate, the commutator segment has a plurality of K-shaped inner hooks to be connected to the insulating substrate, and the diameter of the commutator is greater than or equal to 7.8 mm and less than 8.8 mm. A commutator of this structure avoids the situation in the prior art where multiple plow teeth are arranged along the circumferential direction at the same height by changing the setting of the tool, so as to avoid the spacing between adjacent plow teeth being limited by the size of the commutator and the plow teeth being too small, thereby extending the life of the tool, reducing economic costs and having mass production capability, so that a commutator with a diameter less than 8.8 mm and having a K-shaped inner hook can be mass-produced.

Description

Technical Field

[0001] The invention relates to the technical field of commutators, and in particular to a commutator, a motor and a tool. Background Art

[0002] As one of the core components of DC motors and AC motors, the commutator is a rotating electrical switch, a device connected to the winding coil of the motor, which relies on the sliding contact of the motor carbon brush to periodically change the direction of the current between the motor rotor and the external circuit to keep the motor running. The commutator includes commutator segments, and the inner hooks of the commutator segments include C-type inner hooks and K-type inner hooks. The processing technology of the C-type inner hook is more mature, and the K-type inner hook has a larger bonding area and greater bonding force with the insulating substrate than the C-type inner hook, and has better comprehensive mechanical properties. The inner hook of the commutator segment is formed by tool processing. At present, commutators with a diameter greater than or equal to 8.8 mm and a K-type inner hook can be processed.

[0003] The multiple plow teeth of the tool in the prior art are arranged along the circumferential direction at the same height and are arranged one by one corresponding to the gaps between adjacent inner hooks. When a commutator with a diameter less than 8.8 mm and a K-type inner hook needs to be mass-produced, the spacing between adjacent plow teeth will be limited by the size of the commutator and the plow teeth are too small, resulting in too little strength or even no strength, resulting in an extremely short tool life, high economic cost and lack of mass production, which brings difficulties to mass-produced commutators with a diameter less than 8.8 mm and a K-type inner hook. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that when it is necessary to mass-produce a commutator with a diameter less than 8.8 mm and a K-type inner hook, the tool life is extremely short, the economic cost is high, and it is not mass-producible, which brings difficulties to the mass production of commutators with a diameter less than 8.8 mm and a K-type inner hook, thereby providing a commutator, a motor and a tool.

[0005] A commutator, comprising:

[0006] Insulating substrate;

[0007] A commutator segment is arranged on the periphery of the insulating substrate, the commutator segment has a plurality of K-shaped inner hooks for connecting to the insulating substrate, and the diameter of the commutator is greater than or equal to 7.8 mm and less than 8.8 mm.

[0008] Furthermore, each of the K-type inner hooks includes a first inner hook and a second inner hook, and the first inner hook and the second inner hook are arranged in sequence along the direction away from the wire hanging hook of the commutator segment. The upper wall surface of the first inner hook is inclined toward the direction away from the second inner hook, and the bottom wall surface of the second inner hook is inclined toward the direction away from the first inner hook.

[0009] Furthermore, the side portions of the first inner hook and / or the second inner hook are arranged in a dovetail structure.

[0010] Furthermore, the first inner hook includes a first inner hook extension body and a first inner hook connecting body, the first inner hook extension body is symmetrically arranged, and the first inner hook connecting body is connected to the first inner hook extension body; the second inner hook includes a second inner hook extension body, and the second inner hook extension body is symmetrically arranged.

[0011] A motor comprises the above-mentioned commutator.

[0012] A cutting tool comprising:

[0013] Tool bar;

[0014] A plurality of first plowshare teeth, which are arranged on the cutter bar along the circumferential direction;

[0015] A plurality of second coulter teeth are arranged on the cutter bar along the circumferential direction, the first coulter teeth are arranged on the head side of the second coulter teeth close to the cutter bar, and the inner hook of the commutator is processed by the first coulter teeth and the second coulter teeth.

[0016] Furthermore, when the commutator is processed by the tool, the sum of the number of the first coulter teeth and the number of the second coulter teeth is equal to the number of gaps between the K-type inner hooks.

[0017] Furthermore, it also includes a guide head, on which a guide protrusion is provided, wherein the guide head is arranged on the head side of the first plow cutter tooth close to the cutter rod and is sleeved on the cutter rod.

[0018] Furthermore, it also includes a first coulter and a second coulter, wherein the first coulter and the second coulter are installed on the tool bar, wherein the first coulter teeth are arranged on the first coulter, and the second coulter teeth are arranged on the second coulter.

[0019] Furthermore, it also includes a tool rod sleeve, the tool rod is installed in the tool rod sleeve and the two are connected by a positioning piece, and the guide head, the first plow blade and the second plow blade are located between the limiting step surface of the tool rod and the upper end surface of the tool rod sleeve.

[0020] The technical solution of the present invention has the following advantages:

[0021] 1. The present invention provides a commutator, which includes: an insulating substrate; a commutator segment, wherein the commutator segment is arranged on the periphery of the insulating substrate, and the commutator segment has a plurality of K-shaped inner hooks to connect to the insulating substrate, and the diameter of the commutator is greater than or equal to 7.8 mm and less than 8.8 mm. A commutator of this structure avoids the situation in the prior art where multiple plow teeth are arranged along the circumferential direction at the same height by changing the setting of the tool, so as to avoid the spacing between adjacent plow teeth being limited by the size of the commutator and the plow teeth being too small, thereby extending the life of the tool, reducing economic costs, and having mass production, so that a commutator with a diameter less than 8.8 mm and a K-shaped inner hook can be mass-produced.

[0022] 2. In a commutator provided by the present invention, the side of the first inner hook and / or the second inner hook is arranged in a dovetail structure. A commutator with this structure, through the dovetail structure, has a large bonding area and a large bonding force between the commutator segment and the insulating substrate, thereby ensuring that the commutator segment has excellent rotation performance.

[0023] 3. The present invention provides a motor, which includes the above-mentioned commutator. A motor of this structure, because it includes the above-mentioned commutator, naturally has the advantages brought by including the above-mentioned commutator.

[0024] 4. The present invention provides a tool, which includes: a tool bar; a plurality of first coulter teeth, which are arranged on the tool bar along the circumferential direction; a plurality of second coulter teeth, which are arranged on the tool bar along the circumferential direction, wherein the first coulter teeth are arranged on the side of the head of the second coulter teeth close to the tool bar, and the inner hook of the commutator is processed by the first coulter teeth and the second coulter teeth. A tool of this structure, by providing the first coulter teeth and the second coulter teeth, can avoid the spacing between adjacent coulter teeth being limited by the size of the commutator and the occurrence of the coulter teeth being too small, thereby extending the life of the tool, reducing economic costs, and having mass production, so that a commutator with a diameter of less than 8.8 mm and a K-type inner hook can be mass-produced.

[0025] 5. A tool provided by the present invention further includes a guide head, on which a guide protrusion is provided, wherein the guide head is provided on the head side of the first coulter tooth close to the tool rod and sleeved on the tool rod. A tool of this structure can open the commutator by providing a guide head to avoid burrs when processing the inner hook of the coulter tooth.

[0026] 6. A tool provided by the present invention further includes a first coulter and a second coulter, wherein the first coulter and the second coulter are installed on the tool bar, wherein the first coulter is provided with the first coulter teeth, and the second coulter is provided with the second coulter teeth. It also includes a tool bar sleeve, wherein the tool bar is installed in the tool bar sleeve and the two are connected by a positioning member, and the guide head, the first coulter and the second coulter are located between the limiting step surface of the tool bar and the upper end surface of the tool bar sleeve. A tool of this structure is provided with a first coulter, a second coulter and a tool bar sleeve, that is, the tool is separately provided, and the various parts of the tool can be easily processed separately to improve the processing efficiency, and the corresponding parts can be processed by selecting appropriate materials according to the needs to reduce the economic cost, and the replacement cost of each part is low when it is damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 is a cross-sectional view of a commutator provided in Embodiment 1 of the present invention;

[0029] Figure 2 for Figure 1 The schematic diagram of the structure of the copper shell shown;

[0030] Figure 3 for Figure 2 A schematic diagram of the structure of the copper shell and the insulating substrate shown;

[0031] Figure 4 for Figure 4 A schematic diagram of the structure of the commutator segments and the insulating substrate shown;

[0032] Figure 5 It is a schematic diagram of the structure of the tool provided in Example 3 of the present invention;

[0033] Figure 6 for Figure 5 a cross-sectional view of the tool shown;

[0034] Description of reference numerals:

[0035] 1-insulating substrate, 2-commutator segment, 21-hanging hook, 31-first inner hook, 311-first inner hook extension body, 312-first inner hook connecting body, 32-second inner hook, 321-second inner hook extension body, 4-knife rod, 41-limiting step surface, 51-first plowshare, 52-first plowshare tooth, 61-second plowshare, 62-second plowshare tooth, 71-guide head, 72-guide protrusion, 8-knife rod sleeve, 9-locating pin, 10-copper shell. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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.

[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] Example 1

[0041] This embodiment provides Figures 1 to 4A commutator shown in the figure comprises an insulating substrate 1 and a commutator segment 2. The commutator segment 2 is arranged on the periphery of the insulating substrate 1, and the commutator segment 2 has a plurality of K-shaped inner hooks to connect to the insulating substrate 1. The diameter of the commutator is greater than or equal to 7.8 mm and less than 8.8 mm. Specifically, the commutator segment 2 is made of copper or other materials. It should be noted that the diameter of the commutator refers to the diameter of the outer wall surface of the enclosed commutator segment 2, wherein Figure 1 The outer wall of the middle commutator segment 2 is gradually contracted in the direction away from the wire hook 21 of the commutator segment 2. At this time, the diameter of the commutator refers to the diameter of the end of the outer wall of the commutator segment 2 close to the wire hook 21.

[0042] like Figure 1 and Figure 2 As shown, each K-type inner hook includes a first inner hook 31 and a second inner hook 32, which are sequentially arranged in a direction away from the wire hook 21 of the commutator segment 2, the upper wall surface of the first inner hook 31 is inclined toward the direction away from the second inner hook 32, and the bottom wall surface of the second inner hook 32 is inclined toward the direction away from the first inner hook 31. The first inner hook 31 and the second inner hook 32 are arranged at intervals.

[0043] In this embodiment, the side of the first inner hook 31 and the second inner hook 32 are arranged in a dovetail structure. As an alternative embodiment, the side of the first inner hook 31 or the second inner hook 32 is arranged in a dovetail structure. The dovetail structure is arranged so that the commutator segment 2 and the insulating substrate 1 have a large bonding area and a strong bonding force, ensuring that the commutator segment 2 has excellent rotation performance; there is almost no gap visible to the naked eye at the interface between the commutator segment 2 and the insulating substrate 1 (especially after welding), and the roundness and step difference after fine turning are maintained relatively well, especially under complex working conditions.

[0044] In this embodiment, the first inner hook 31 includes a first inner hook extension body 311 and a first inner hook connecting body 312, the first inner hook extension body 311 is symmetrically arranged, and the first inner hook connecting body 312 is connected to the first inner hook extension body 311; the second inner hook 32 includes a second inner hook extension body 321, and the second inner hook extension body 321 is symmetrically arranged. The first inner hook extension body 311 and the second inner hook extension body 321 are arranged correspondingly.

[0045] A commutator in this embodiment avoids the situation in the prior art where multiple plow teeth are arranged along the circumferential direction at the same height by changing the setting of the tool, so as to avoid the spacing between adjacent plow teeth being limited by the size of the commutator and the plow teeth being too small. This can extend the life of the tool, reduce economic costs, and have mass producibility, so that commutators with a diameter of less than 8.8 mm and a K-type inner hook can be mass-produced.

[0046] Example 2

[0047] This embodiment provides a motor, which includes the commutator of Embodiment 1. It should be noted that the commutator in Embodiment 1 is suitable for motors with low noise, long life and high safety requirements.

[0048] Example 3

[0049] This embodiment provides Figure 5 and Figure 6 The tool shown in FIG. 1 comprises a tool bar 4, a plurality of first coulter teeth 52, a plurality of second coulter teeth 62, a guide head 71, a first coulter 51, a second coulter 61 and a tool bar sleeve 8. Figure 5 and Figure 6 As shown, a plurality of first coulter teeth 52 are arranged on the cutter bar 4 along the circumferential direction; a plurality of second coulter teeth 62 are arranged on the cutter bar 4 along the circumferential direction, and the first coulter teeth 52 are arranged on the head side of the second coulter teeth 62 close to the cutter bar 4, and the inner hook of the commutator is processed by the first coulter teeth 52 and the second coulter teeth 62.

[0050] When the commutator in Example 1 is processed by the tool, the sum of the number of the first coulter teeth 52 and the second coulter teeth 62 is equal to the number of gaps between the K-type inner hooks. That is, during processing, the first coulter teeth 52 and the second coulter teeth 62 pass through the gaps between the K-type inner hooks to form the inner hooks. It should be noted that the tool can also process a commutator with a diameter greater than or equal to 8.8 mm. Combined with Example 1, a commutator with a diameter greater than or equal to 7.8 mm can be processed.

[0051] like Figure 5 As shown, a guide protrusion 72 is provided on the guide head 71, wherein the guide head 71 is provided on the head side of the first coulter tooth 52 close to the cutter bar 4 and is sleeved on the cutter bar 4. Specifically, the guide protrusion 72 protrudes radially from the first coulter tooth 52 and the second coulter tooth 62. By providing the guide head 71, the commutator can be propped open to avoid burrs when processing the inner hook of the coulter tooth.

[0052] like Figure 5 and Figure 6 As shown, the first coulter 51 and the second coulter 61 are mounted on the cutter bar 4, wherein the first coulter 51 is provided with a first coulter tooth 52, and the second coulter 61 is provided with a second coulter tooth 62. The first coulter 51 and the second coulter 61 can be made of alloy material or other materials.

[0053] like Figure 5 and Figure 6As shown, the cutter bar 4 is installed in the guide rod sleeve 8 and the two are connected by a positioning member such as a positioning pin 9, and the guide head 71, the first coulter 51 and the second coulter 61 are located between the limiting step surface 41 of the cutter bar 4 and the upper end surface of the cutter bar sleeve 8. The cutter bar 4, the guide head 71 and the cutter bar sleeve 8 can be made of stainless steel or other materials; the upper end surface of the cutter bar sleeve 8 refers to the end surface of the cutter bar sleeve 8 close to the head of the cutter bar 4.

[0054] By providing the guide head 71, the first plow blade 51, the second plow blade 61 and the tool rod sleeve 8, that is, the tool is separately provided, the various parts of the tool can be easily processed separately to improve the processing efficiency, and suitable materials can be selected according to needs to process the corresponding parts to reduce economic costs, and the replacement cost of each part is low when it is damaged.

[0055] The processing flow of the commutator in this embodiment is as follows: copper shell 10 is stamped → degreased and cleaned → dried → Figure 2 The copper shell 10 and the insulating base 1 made of insulating material are extruded and molded → as shown Figure 3 Heat treatment as shown → Figure 3 Finishing as shown → Figure 4 Test as shown → Figure 4 As shown in the appearance → Figure 4 It should be noted that the commutator segments 2 are formed by processing the copper shell 10 .

[0056] A tool in the present embodiment is provided with a first plow tooth 52 and a second plow tooth 62 to avoid the spacing between adjacent plow teeth being limited by the size of the commutator and the plow teeth being too small. This can extend the life of the tool, reduce economic costs, and have mass producibility, so that a commutator with a diameter of less than 8.8 mm and a K-type inner hook can be mass-produced.

[0057] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A cutting tool, characterized in that: It includes: Tool bar; A plurality of first plowshare teeth, which are arranged on the cutter bar along the circumferential direction; A plurality of second coulter teeth are arranged on the cutter bar along the circumferential direction, the first coulter teeth are arranged on the side of the second coulter teeth close to the head of the cutter bar, and the inner hook of the commutator is processed by the first coulter teeth and the second coulter teeth; The commutator is processed by the tool, wherein the commutator comprises an insulating substrate and a commutator segment, wherein the commutator segment is arranged at the periphery of the insulating substrate, the commutator segment has a plurality of K-shaped inner hooks for connecting to the insulating substrate, and the diameter of the commutator is greater than or equal to 7.8 mm and less than 8.8 mm; The sum of the number of the first coulter teeth and the number of the second coulter teeth is equal to the number of gaps between the K-shaped inner hooks; A guide head is provided with a guide protrusion, wherein the guide head is arranged on the head side of the first coulter tooth close to the knife rod and is sleeved on the knife rod, and the guide protrusion radially protrudes from the first coulter tooth and the second coulter tooth.

2. A tool according to claim 1, characterized in that: It also includes a first coulter and a second coulter, wherein the first coulter and the second coulter are mounted on the tool bar, wherein the first coulter is provided with the first coulter teeth, and the second coulter is provided with the second coulter teeth.

3. A tool according to claim 2, characterized in that: It also includes a tool rod sleeve, the tool rod is installed in the tool rod sleeve and the two are connected by a positioning piece, and the guide head, the first coulter and the second coulter are located between the limiting step surface of the tool rod and the upper end surface of the tool rod sleeve.

4. A commutator, characterized in that: The commutator is manufactured by machining with a tool according to any one of claims 1 to 3, and the commutator comprises: Insulating substrate; A commutator segment is arranged on the periphery of the insulating substrate, the commutator segment has a plurality of K-shaped inner hooks for connecting to the insulating substrate, and the diameter of the commutator is greater than or equal to 7.8 mm and less than 8.8 mm.

5. A commutator according to claim 4, characterized in that: Each of the K-type inner hooks includes a first inner hook and a second inner hook, which are arranged in sequence along the direction of the wire hanging hook away from the commutator segment. The upper wall surface of the first inner hook is inclined toward the direction away from the second inner hook, and the bottom wall surface of the second inner hook is inclined toward the direction away from the first inner hook.

6. A commutator according to claim 5, characterized in that: The side portions of the first inner hook and / or the second inner hook are arranged in a dovetail structure.

7. A commutator according to claim 5, characterized in that: The first inner hook includes a first inner hook extension body and a first inner hook connecting body, the first inner hook extension body is symmetrically arranged, and the first inner hook connecting body is connected to the first inner hook extension body; the second inner hook includes a second inner hook extension body, and the second inner hook extension body is symmetrically arranged.

8. A motor, characterized in that: It comprises a commutator as claimed in any one of claims 4 to 7.

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