An electric machine

Abstract

This invention provides an electric motor, belonging to the field of electric motor technology. It includes a housing with a front cover mounting end and a rear cover mounting end. A front cover is mounted on the front cover mounting end, and a rear cover is mounted on the rear cover mounting end. The front cover, housing, and rear cover form a receiving chamber. A wire outlet hole is provided on the side of the housing near the rear cover. A stator winding and a rotor passing through the stator winding are installed in the receiving chamber. The stator winding and rotor divide the receiving chamber into a first chamber and a second chamber. The first chamber is formed on the side near the front cover and is configured to house the coil. The second chamber is formed on the side near the rear cover and is configured as a brake. The coil has a lead wire. A guide groove is also provided on the housing, configured to guide the lead wire from the coil in the first chamber to the second chamber and out through the wire outlet hole on the housing. This invention effectively shortens the overall length of the electric motor, reduces material consumption, and lowers costs.

Description

Technical Field

[0001] This invention belongs to the field of electric motors, and particularly relates to an electric motor. Background Technology

[0002] Currently, conventional motor windings are tied at the rear end of the motor. After the stator is tied, the lead wires are passed out through the socket holes in the housing. However, the wire coil occupies part of the housing space after tying. Since the space in the rear cover is already occupied by the brake, the housing must be lengthened to increase the space for the wire coil, which increases the overall length of the motor and leads to an increase in material costs.

[0003] In view of this, the present invention is proposed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a motor.

[0005] To solve the above technical problems, this invention provides a motor, which includes a housing. The housing has a front cover mounting end and a rear cover mounting end. A front cover is mounted on the front cover mounting end, and a rear cover is mounted on the rear cover mounting end. The front cover, the housing, and the rear cover form an accommodating cavity. A wire outlet hole is provided on the side of the housing near the rear cover.

[0006] The accommodating cavity is equipped with a stator winding and a rotor that passes through the stator winding. The stator winding and the rotor divide the accommodating cavity into a first chamber and a second chamber.

[0007] The first chamber is formed on the side near the front end cover and is configured to house the coil, and the second chamber is formed on the side near the rear end cover and is configured to house the brake. The coil has lead wires.

[0008] The housing is also provided with a guide groove, which is configured to guide the lead wire of the coil in the first chamber to the second chamber and out from the wire outlet hole on the housing.

[0009] In the above technical solution, the guide groove includes a first groove segment and a second groove segment formed on the housing and interconnected with each other;

[0010] The first groove is provided in two sets along the axial direction of the casing. One set of the first groove is located near the front cover mounting end, and the other set of the first groove is located near the rear cover mounting end.

[0011] The second slot is positioned between the two sets of first slots and is configured to connect the two sets of first slots.

[0012] In the above technical solution, each group of first slots includes at least two first slot units extending along different radial directions of the housing, and the first slot units of the two groups of first slots are arranged one-to-one in the axial direction of the housing.

[0013] The second slot segment includes at least two second slot segment units, each of which extends along the axial direction of the housing and is connected between two corresponding first slot segment units. The second slot segment units are configured to conduct the two symmetrical first slot segment units.

[0014] In the above technical solution, both sets of first slots include three first slot units, and the second slot includes three second slot units.

[0015] In the above technical solution, the first slot segment unit includes a first slot extending in the thickness direction of the housing and opening in the inner wall surface of the housing, and the second slot segment unit includes a second slot extending inside the housing and extending along the length direction of the housing. The first slot and the second slot are circular holes and the first slot is connected to the second slot.

[0016] In the above technical solution, the first slot is opened along the radial direction of the housing, and the second slot is opened along the axial direction of the housing.

[0017] In the above technical solution, a rounded corner is formed at the connection between the first slot and the second slot, and the radius of the rounded corner is between 3mm and 8mm.

[0018] In the above technical solution, the guide groove also includes a third groove section formed on the housing, which is located near the rear cover mounting end.

[0019] In the above technical solution, the third groove segment includes an annular groove formed on the inner wall surface of the housing.

[0020] In the above technical solution, the first groove segment located near the mounting end of the rear cover is formed at the bottom of the third groove segment and is connected to the third groove segment.

[0021] In the above technical solution, the surface of the lead wire of the coil is fitted with a heat insulation tube.

[0022] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0023] I. This invention adopts the method of front-mounting the stator winding lead wire, which can make full use of the remaining space of the front cover to place the coil, making the motor structure more compact, effectively shortening the overall length of the motor, solving the industry difficulty of excessive motor length affecting installation, reducing motor material consumption, and lowering costs.

[0024] Second, the housing of the present invention is provided with a third slot for wiring, which can also be used to arrange and gather the lead wires without affecting the utilization rate of the internal space of the motor, thereby facilitating the management of the lead wires.

[0025] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0026] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0027] Figure 1 This is a schematic diagram of the internal structure of a current technology center motor;

[0028] Figure 2 This is a schematic diagram of the internal structure of the motor according to an embodiment of the present invention;

[0029] Figure 3 This is a three-dimensional structural diagram of the housing in an embodiment of the motor of the present invention;

[0030] Figure 4 for Figure 3 A schematic diagram of the front view structure along direction B in the embodiment;

[0031] Figure 5 A partial cross-sectional view of the housing in an embodiment of the motor of the present invention;

[0032] Figure 6 for Figure 2 An enlarged structural diagram at point A in the embodiment;

[0033] Figure 1 In the middle, 1'-housing, 2'-front end cover, 3'-rear end cover, 4'-coil, 5'-brake;

[0034] Figure 2-6 In the middle, 1-casing, 11-front cover mounting end, 12-rear cover mounting end, 13-outlet hole, 2-front end cover, 21-stator winding, 3-rear end cover, 4-rotor, 5-first chamber, 6-second chamber, 7-coil, 8-brake, 9-guide slot, 91-first slot segment, 911-first slot segment unit, 92-second slot segment, 922-second slot segment unit, 93-third slot segment;

[0035] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0036] In the description of this invention, it should be noted that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "contact," and "communication" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] Currently, conventional motors have the stator windings tied at the rear end. After the stator is tied, the lead wires are passed through the socket holes in the housing. However, the tied wire coil occupies part of the housing space, and the space in the rear cover is already occupied by the brake. Therefore, the housing must be lengthened to accommodate the wire coil, resulting in a longer overall motor length and increased material costs. This invention adopts a front-mounted stator winding tie method. The space required for the wire coil can be fully utilized in the remaining space of the front cover, making the motor structure more compact, effectively shortening the overall motor length, solving the industry difficulty of excessively long motors affecting installation, reducing motor material consumption, and lowering costs.

[0039] To further illustrate the technical solution of this invention, the following is combined with... Figures 1-6 As shown, the following specific embodiments are provided.

[0040] Before describing the embodiments of this application, the winding binding of a conventional motor will be explained in detail:

[0041] like Figure 1 As shown, a conventional motor mainly consists of a housing 1', a front cover 2', a rear cover 3', a coil 4', and a brake 5'. The coil 4' and the brake 5' are both installed at the rear end of the motor (i.e., at the position of the rear cover 3'). However, in this installation method, the coil 4' occupies part of the space in the housing 1', and the space in the rear cover 3' is already occupied by the brake 5'. Therefore, the housing 1' must be lengthened to increase the space for the coil 4', which results in an increase in the overall length of the motor and thus an increase in material costs.

[0042] In order to solve the problems existing in the prior art, this application provides a technical solution to solve the above problems, and the technical solution is specifically illustrated through the following embodiments.

[0043] Example 1

[0044] This application provides a method such as... Figure 2 The motor shown includes a housing 1 with a front cover mounting end 11 and a rear cover mounting end 12. A front cover 2 is mounted on the front cover mounting end 11, and a rear cover 3 is mounted on the rear cover mounting end 12. The front cover 2, housing 1, and rear cover 3 form a receiving chamber. A wire outlet hole 13 is provided on the side of the housing 1 near the rear cover 3. A stator winding 21 and a rotor 4 passing through the stator winding 21 are installed in the receiving chamber. Sub-4 divides the accommodating chamber into a first chamber 5 and a second chamber 6. The first chamber 5 is formed on the side near the front end cover 2 and is configured to accommodate the coil 7. The second chamber 6 is formed on the side near the rear end cover 3 and is configured to accommodate the brake 8. The coil 7 has a lead wire. A guide groove 9 is also provided on the housing 1. The guide groove 9 is configured to guide the lead wire of the coil 7 located in the first chamber 5 to the second chamber 6 and lead it out from the wire outlet hole 13 on the housing 1.

[0045] In this embodiment, by adopting a front-mounted approach, placing the coil 7 in the first chamber 5 near the front cover 2, the remaining space of the front cover 2 can be fully utilized, making the motor structure more compact. Furthermore, while changing the installation position of the coil 7, this embodiment uses a guide groove 9 to guide the lead wire of the coil 7 to the second chamber 6 and out through the wire outlet hole 13 in the second chamber 6. This ensures that the motor structure is compact while guaranteeing that the lead wire of the coil 7 is led out from the rear end of the motor, thus avoiding the problem of motor installation difficulties caused by the lead wire of the coil 7 being led out from the front end of the motor.

[0046] The specific structure of guide groove 9 is described below:

[0047] like Figures 3-5 As shown, the guide groove 9 includes a first groove segment 91 and a second groove segment 92 formed on the housing 1 and connected to each other. The first groove segment 91 is arranged in two sets along the axial direction of the housing 1. One set of the first groove segment 91 is located near the front cover mounting end 11, and the other set of the first groove segment 91 is located near the rear cover mounting end 12. The second groove segment 92 is located between the two sets of the first groove segment 91 and is configured to connect the two sets of the first groove segment 91.

[0048] When installing the coil 7, the lead wire of the coil 7 extends from the first groove 91 near the front cover mounting end 11 into the second groove 91, and extends along the extension path of the second groove 91 from the second groove 92 near the rear cover mounting end 12, and is led out through the outlet hole 13 provided near the rear cover mounting end 12.

[0049] Specifically, such as Figure 5As shown, each set of first slot segments 91 includes at least two first slot segment units 911 extending along different radial directions of the housing 1, and the first slot segment units 911 of the two sets of first slot segments 91 are correspondingly arranged one-to-one in the axial direction of the housing 1. The second slot segment 92 includes at least two second slot segment units 922, each second slot segment unit 922 extending along the axial direction of the housing and connected between the two correspondingly arranged first slot segment units 911. The second slot segment unit 922 is configured to conduct the two symmetrical first slot segment units 911. Each second slot segment unit 922 can allow one lead wire of the coil 7 to pass through, that is, one lead wire of the coil 7 enters through the first slot segment unit 911 near the front end cover 2 of the two symmetrical first slot segment units 911, passes through the second slot segment unit 922, and extends out from the first slot segment unit 911 near the rear end cover 2.

[0050] It is worth noting that the number of first slot segment units 911 and second slot segment units 922 can be adjusted according to the phase of the motor. For example, when the motor is a single-phase motor, it has two coil 7 leads. In this case, the first slot segment 91 includes two first slot segment units 911, and the corresponding second slot segment 92 includes two second slot segment units 922. As another example, when the motor is a three-phase motor, it has three coil 7 leads. In this case, the first slot segment 91 includes three first slot segment units 911, and the corresponding second slot segment 92 includes three third slot segment units 922.

[0051] For ease of explanation, the following description uses a three-phase motor as an example:

[0052] Specifically, such as Figure 3 and Figure 5 As shown, the first slot segment unit 911 includes a first slot extending in the thickness direction of the housing 1 and having an opening in the inner wall surface of the housing 1, and the second slot segment unit includes a second slot extending inside the housing 1 and along the length direction of the housing 1. The first slot and the second slot are circular holes and the first slot is connected to the second slot.

[0053] After the stator winding 21 is tied, the three-phase lead wires of the coil 7 are respectively inserted into the three second slot units 922 arranged along the axial direction of the housing through the three first slot units 911 set near the front end cover 2, and then out through the three first slot units 911 set near the rear end cover 3 to the rear end of the motor. After the three-phase wires are out through the three first slot units 911 set near the rear end cover 3, they are out through the wire outlet holes 13 on the inner wall of the housing 1.

[0054] Furthermore, such as Figure 6As shown, in order to facilitate the threading of the three-phase power lines to the rear end of the motor, a rounded corner is formed between the first slot and the second slot in this embodiment of the application. The radius of the rounded corner is between 3mm and 8mm. By setting this rounded corner, the jamming phenomenon during the threading process can be avoided, and the lead wire can enter the second slot more smoothly from the first slot.

[0055] Furthermore, such as Figure 3 and Figure 5 As shown, to facilitate the coiling of the lead wires, the guide groove 9 in this embodiment further includes a third groove segment 93 formed on the housing 1, wherein the third groove segment 93 is located near the rear cover mounting end 12. When the lead wire of the coil 7 emerges from the first slot near the rear cover 3, it is coiled and gathered through the third groove segment 93 on the housing 1, and the gathered lead wire exits from the outlet hole 13 on the housing 1.

[0056] Specifically, such as Figure 5 As shown, the third groove segment 93 includes an annular groove formed on the inner wall surface of the housing 1. The first groove segment 91, which is located near the rear cover mounting end 12, is formed at the bottom of the third groove segment 93 and is connected to the third groove segment 93, thereby facilitating the routing of the lead wires without affecting the utilization rate of the internal space of the housing 1.

[0057] In addition, when the three-phase power supply line passes through the second slot on the housing 1 to the rear end of the motor (i.e., the rear end cover 3), the motor will generate high temperature during operation. When the power supply line works in a high-temperature environment, its insulation performance and service life will be affected. Therefore, a heat-insulating protective sleeve for the lead wire of the coil 7 needs to be put on the wire. Preferably, the heat-insulating protective sleeve for the wire is a glass fiber yarn-silicone rubber sleeve, so as to protect the power supply line from working normally in a high-temperature environment.

[0058] Finally, it should be noted that the depth and diameter of the first slot 91, the second slot 92 and the third slot 93 mentioned above are not specifically limited in this embodiment. In actual production, the specific depth and diameter of the first slot 91, the second slot 92 and the third slot 93 can be designed according to the size of the motor and the diameter of the three-phase power line used.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An electric motor, characterized in that, The motor includes a housing (1), which has a front cover mounting end (11) and a rear cover mounting end (12). A front cover (2) is mounted on the front cover mounting end (11), and a rear cover (3) is mounted on the rear cover mounting end (12). The front cover (2), the housing (1), and the rear cover (3) form a receiving chamber. A wire outlet hole (13) is provided on the side of the housing (1) near the rear cover (3). The accommodating cavity is equipped with a stator winding (21) and a rotor (4) passing through the stator winding (21). The stator winding (21) and the rotor (4) divide the accommodating cavity into a first chamber (5) and a second chamber (6). The first chamber (5) is formed on one side near the front end cover (2) and is configured to accommodate the coil (7), and the second chamber (6) is formed on one side near the rear end cover (3) and is configured to accommodate the brake (8), and the coil (7) has a lead wire; The housing (1) is also provided with a guide groove (9), which is configured to guide the lead wire of the coil (7) located in the first chamber (5) to the second chamber (6) and out from the wire outlet hole (13) on the housing (1); The guide groove (9) further includes a third groove section (93) formed on the housing (1). The third groove section (93) is located near the rear cover mounting end (12). The third groove section (93) includes an annular groove formed on the inner wall surface of the housing (1). A first groove section (91) located near the rear cover mounting end (12) is formed at the bottom of the third groove section (93) and is connected to the third groove section (93).

2. The motor according to claim 1, characterized in that, The guide groove (9) includes a first groove segment (91) and a second groove segment (92) formed on the housing (1) and interconnected. The first groove segment (91) is provided in two sets along the axial direction of the housing. One set of the first groove segment (91) is provided close to the front cover mounting end (11), and the other set of the first groove segment (91) is provided close to the rear cover mounting end (12). The second slot (92) is disposed between the two sets of first slots (91) and configured to connect the two sets of first slots (91).

3. The motor according to claim 2, characterized in that, Each group of the first slot segment (91) includes at least two first slot segment units (911) extending along different radial directions of the housing (1), and the first slot segment units (911) of the two groups of the first slot segment (91) are arranged one-to-one in the axial direction of the housing (1). The second slot segment (92) includes at least two second slot segment units (922), each of which extends along the axial direction of the housing (1) and is connected between two corresponding first slot segment units (911), and the second slot segment unit (922) is configured to conduct two symmetrical first slot segment units (911).

4. The motor according to claim 3, characterized in that, Both sets of the first slot segment (91) include three first slot segment units (911), and the second slot segment (92) includes three second slot segment units (922).

5. The motor according to claim 4, characterized in that, The first slot segment unit (911) includes a first slot extending in the thickness direction of the housing (1) and opening in the inner wall surface of the housing. The second slot segment unit includes a second slot extending inside the housing (1) and along the length direction of the housing (1). The first slot and the second slot are circular holes and the first slot is connected to the second slot.

6. The motor according to claim 5, characterized in that, The first slot and the second slot are connected by a rounded corner, the radius of which is between 3mm and 8mm.

7. The motor according to claim 1, characterized in that, The lead wire of the coil (7) is fitted with a heat insulation tube.

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