A switched reluctance motor

Abstract

The utility model relates to a kind of switched reluctance motor, belong to switched reluctance motor technical field.It includes casing (2), from the inner wiring (34) leading out from casing (2), and the outer wiring (35) leading into terminal box (1) from outside is connected in terminal box (1) in correspondence, it is characterized by: wire hole (29) is set up in the surface of terminal box (1), at least one set of clamping block assembly for clamping and realizing the outer wiring (35) and the fixation of terminal box (1) is set on the outer end surface of terminal box (1), and each set of clamping block assembly clamps multiple outer wiring (35) simultaneously.In the switched reluctance motor of the present application, the outer wiring is clamped by clamping block assembly at the outlet of terminal box, effectively avoiding the situation that the wiring falls off occurs due to the vibration in the running process of electric locomotive, and compared with the fixing mode of outlet by using terminal in the prior art, its structure is simpler, and the cost is lower.

Description

Technical Field

[0001] A switched reluctance motor, belonging to the field of switched reluctance motor technology. Background Technology

[0002] Switched reluctance motors are variable reluctance motors with doubly salient poles on the stator and rotor. They possess advantages such as simple structure, reliable performance, low starting current, high starting torque, wide speed range, and high efficiency. Due to these advantages, switched reluctance motors are widely used in various equipment requiring high traction, such as electric locomotives.

[0003] In the prior art, switched reluctance motors generally have a junction box on their surface for leading out the wires inside the switched reluctance motor to facilitate external wiring. Examples include the Chinese utility model patent with application number 201721270309.8 (filed September 29, 2017) entitled "A Direct-Drive Switched Reluctance Motor with Geared Shaft Ends," the Chinese utility model patent with application number 201920111833.3 (filed January 23, 2019) entitled "A Switched Reluctance Motor Module for Electric Vehicles," and the Chinese utility model patent with application number 202322510744.5 (filed September 15, 2023) entitled "An Internal Power Connection Line for a Switched Reluctance Motor."

[0004] The drawback of the above-mentioned existing technical solution is that the wires are not constrained at the outlet of the junction box. Since electric locomotives are prone to vibration during operation, external wiring may easily come loose. The technical solutions described in the following Chinese invention patents—application number 201210059820.9, application date March 8, 2012, entitled "Junction Box for Switched Reluctance Motor," application number 202410406438.3, application date April 7, 2024, entitled "A Liquid-Cooled Switched Reluctance Motor," and application number 202010255684.5, application date April 2, 2020, entitled "A High-Power Switched Reluctance Motor"—involve the wires by using copper tube terminals at the outlet of the junction box. This method requires the placement of terminals at the junction box, followed by tightening the wires through these terminals. The drawbacks of this method are its complex structure, high cost, and the potential for loosening during prolonged use. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a switched reluctance motor that clamps the external wiring by setting a clamping block assembly at the outlet of the junction box, which effectively avoids the wiring from falling off due to vibration during the operation of the electric locomotive. At the same time, compared with the prior art of fixing the outlet by using terminal blocks, its structure is simpler and the cost is lower.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The switched reluctance motor includes a housing, a stator is provided inside the housing, a rotor is provided at the center of the stator, the motor shaft is coaxially fixed with the rotor and leads out from one end of the housing, a junction box is provided on the surface of the housing, and the internal wiring led out from the housing and the external wiring introduced into the junction box from the outside are connected in the junction box. The feature is that: a lead hole for the external wiring to pass through is opened on the surface of the junction box, and at least one set of clamping block assemblies is provided on the outer end face of the junction box for clamping the external wiring and fixing the external wiring to the junction box. Each set of clamping block assemblies clamps multiple external wirings at the same time.

[0007] Preferably, each clamping block assembly includes two clamping blocks arranged opposite each other, one of which is a fixed clamping block fixed to the surface of the junction box, and the other is a movable clamping block, with the fixed clamping block and the movable clamping block connected by multiple clamping block bolts.

[0008] Preferably, the fixed clamping block and the movable clamping block are arranged opposite to each other, and grooves corresponding to the external wiring are respectively opened on the opposite surfaces of the fixed clamping block and the movable clamping block.

[0009] Preferably, at least one terminal block is provided in the inner cavity of the junction box, and a terminal post is provided on the surface of each terminal block, with a corresponding set of internal and external wires connected to the same terminal post.

[0010] Preferably, a set of flow ports are provided on the surface of the casing, with the opposite flow ports being a cooling air inlet and a cooling air outlet, and multiple air ducts are provided inside the casing, with the beginning and end of the multiple air ducts respectively connecting to the cooling air inlet and the cooling air outlet.

[0011] Preferably, the cooling air inlet is a duct located on one end surface of the housing, and the cooling air outlet is a louver located on the other end surface of the housing.

[0012] Preferably, the air ducts disposed within the housing include a first air duct and a second air duct, with the first air duct formed between the inner wall of the housing and the stator, and the second air duct formed between adjacent rotor teeth on the rotor surface.

[0013] Preferably, a mesh plate is also installed at the port of the air duct.

[0014] Preferably, the motor shaft extends from the front end cover of the housing, and a front bearing is provided in the center hole of the front end cover. An inner front bearing cover and an outer front bearing cover are fixed at the inner and outer ends of the front bearing to limit the outer ring of the front bearing, respectively. A front boss is provided on the surface of the motor shaft. The front boss contacts the rear end of the inner ring of the front bearing. A sealing ring is also provided at the center hole of the outer cover of the front bearing. The sealing ring and the fixing surface of the outer cover of the front bearing are interlocked and inserted. The inner end of the sealing ring contacts the front end of the inner ring of the front bearing.

[0015] Preferably, a rear end cover is provided at the rear end of the housing, a rear bearing is provided in the central hole of the rear end cover, and an inner cover and an outer cover for limiting the outer ring of the rear bearing are respectively fixed at the inner and outer ends of the rear bearing. A rear boss is provided on the surface of the rear end of the motor shaft, and the rear boss contacts the front end of the inner ring of the rear bearing. A bushing is also fitted at the rear end of the motor shaft, and the bushing contacts the front end of the inner ring of the rear bearing.

[0016] Compared with the prior art, the beneficial effects of this utility model are: In the switched reluctance motor of this application, a clamping block assembly is set at the outlet of the junction box to clamp the external wiring, which effectively prevents the wiring from coming loose due to vibration during the operation of the electric locomotive. At the same time, compared with the prior art of using terminals to fix the outlet, its structure is simpler and the cost is lower.

[0017] In the switched reluctance motor of this application, a first air duct and a second air duct are formed inside the housing. When the cooling air passes through the first air duct and the second air duct, it cools the stator and the rotor. In particular, when passing through the second air duct, it also cools the terminals of the internal wiring.

[0018] At the front cover of the housing, the sealing ring and the outer cover of the front bearing are staggered on the fixing surfaces, and staggered annular grooves are respectively set at the staggered surfaces of the sealing ring and the outer cover of the front bearing to form an insertion structure, thereby achieving sealing at the staggered surfaces of the sealing ring and the outer cover of the front bearing. Attached Figure Description

[0019] Figure 1 This is a front view of a switched reluctance motor.

[0020] Figure 2 for Figure 1 Top view.

[0021] Figure 3 for Figure 2 Partial sectional view along the AA direction.

[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0023] Figure 5 for Figure 3 Enlarged view of section B in the middle.

[0024] Figure 6 for Figure 2 Sectional view along the BB direction.

[0025] Figure 7 This is a left view of the junction box.

[0026] Figure 8 for Figure 7 Top view.

[0027] The components include: 1. Junction box; 2. Housing; 3. Louver; 4. Motor shaft; 5. Air duct; 6. Front cover; 7. Front bearing outer cover; 8. Sealing ring; 9. Mesh plate; 10. Rear cover; 11. Sensor end cover; 12. First air duct; 13. Stator; 14. Second air duct; 15. Rotor; 16. Front bearing; 17. Front bearing inner cover; 18. Rear bearing inner cover; 19. Rear bearing; 20. Rear bearing outer cover; 21. Oil slinger; 22. Sensor; 23. Trigger plate; 24. Bushing; 25. Box body; 26. Terminal block; 27. Terminal post; 28. Wiring cavity; 29. ​​Lead hole; 30. Clamp bolt; 31. Clamp fixing bolt; 32. Clamp; 33. Outlet plate; 34. Internal wiring; 35. External wiring. Detailed Implementation

[0028] Figures 1-8 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-8 The present invention will be further described below.

[0029] like Figures 1-2 As shown, a switched reluctance motor includes a housing 2, with a front cover 6 and a rear cover 10 fixed at both ends of the housing 2. A motor shaft 4 is rotatably mounted inside the housing 2, extending from the center of the front cover 6. A junction box 1 is mounted at one end of the upper surface of the housing 2 and is soldered to the surface of the housing 2. The internal wiring 34 of the switched reluctance motor (see...) Figure 8 ), connect to junction box 1.

[0030] Combination Figure 3 A stator 13 is disposed inside the housing 2, and a rotor 15 is disposed at the center of the stator 13. The motor shaft 4 passes through the center of the rotor 15 and extends to the rear end cover 10, and is fixed coaxially with the rotor 15. Inside the housing 2, a first air duct 12 is formed between the inner wall of the housing 2 and the stator 13, and a second air duct 14 is formed between adjacent rotor teeth of the rotor 15.

[0031] A fan duct 5 is also provided on the surface of the housing 2. The fan duct 5 and the junction box 1 are located on opposite sides of the housing 2, and the fan duct 5 is located at the rear end cover 10. A mesh plate 9 is provided at the air inlet (outer port) of the fan duct 5, and the inner port of the fan duct 5 is located inside the housing 2. The external air source is connected to the air inlet of the fan duct 5 and enters the housing 2 through the fan duct 5. After entering the housing 2, it enters the first air duct 12 and the second air duct 14 respectively, and flows axially towards the front end cover 6 as cooling air. Several louvers 3 are evenly opened on the surface of the front end cover 6, and the cooling air is finally blown out through the louvers 3 on the surface of the front end cover 6.

[0032] When the cooling air flows inside the housing 2, the portion of the cooling air flowing through the first air duct 12 cools the stator 13; the portion of the cooling air flowing through the second air duct 14 cools the rotor 15 and the stator 13 respectively, and at the same time cools the terminals of the internal wiring 34 inside the housing 2.

[0033] like Figure 4 As shown, a front bearing 16 is installed in the central hole of the front cover 6. A front bearing inner cover 17 and a front bearing outer cover 7 are coaxially fixed to the inner and outer ends of the central hole of the front cover 6, respectively. Multiple bolts arranged around the front bearing inner cover 17 (and the front bearing outer cover 7) secure the front bearing inner cover 17, the front bearing outer cover 7, and the front cover 6. The combination of the front bearing inner cover 17 and the front bearing outer cover 7 serves a limiting function, restricting the outer ring of the front bearing 16 from both the front and rear sides.

[0034] Both the inner front bearing cover 17 and the outer front bearing cover 7 are annular structures. The front end of the motor shaft 4 passes sequentially through the inner front bearing cover 17, the front end cover 6, and the outer front bearing cover 7 before exiting from the front end of the housing 2. A front boss is formed on the surface of the motor shaft 4, and the front boss contacts the rear end of the inner ring of the front bearing 16. A sealing ring 8 is also provided at the center hole of the outer front bearing cover 7, and the inner end of the sealing ring 8 contacts the front end of the inner ring of the front bearing 16. The front boss on the surface of the motor shaft 4 and the sealing ring 8 together limit the inner ring of the front bearing 16.

[0035] The sealing ring 8 and the front bearing outer cover 7 are staggered on their fixed surfaces, and staggered annular grooves are respectively set at the staggered surfaces of the sealing ring 8 and the front bearing outer cover 7 to form an insertion structure, thereby achieving sealing at the staggered surfaces of the sealing ring 8 and the front bearing outer cover 7.

[0036] like Figure 5As shown, a rear bearing 19 is installed in the central hole of the rear end cover 10. An inner rear bearing cover 18 and an outer rear bearing cover 20 are coaxially fixed to the inner and outer ends of the central hole of the rear end cover 10, respectively. Multiple bolts arranged around the inner rear bearing cover 18 (and the outer rear bearing cover 20) secure the inner rear bearing cover 18, the outer rear bearing cover 20, and the rear end cover 10. The combination of the inner rear bearing cover 18 and the outer rear bearing cover 20 serves a limiting function, restricting the outer ring of the rear bearing 19 from both the front and rear sides.

[0037] Both the inner rear bearing cover 18 and the outer rear bearing cover 20 are annular structures. The rear end of the motor shaft 4 passes sequentially through the inner rear bearing cover 18, the rear end cover 10, and the outer rear bearing cover 20. A bushing 24 is fixedly fitted at the rear end of the motor shaft 4, and the center hole of the outer rear bearing cover 20 is rotatably connected to the outer wall of the bushing 24. An oil slinger 21 is also fitted on the rear side of the motor shaft 4. The oil slinger 21 is located between the rear bearing 19 and the bushing 24. After the bushing 24 is fixed to the motor shaft 4, it further contacts the rear end of the inner ring of the rear bearing 19 through the oil slinger 21. A rear boss is formed on the surface of the rear end of the motor shaft 4, and the rear boss contacts the front end of the inner ring of the rear bearing 19. The rear boss on the surface of the motor shaft 4, the oil slinger 21, and the bushing 24 together limit the inner ring of the rear bearing 19.

[0038] A sensor end cover 11 is coaxially fixed to the outside of the rear bearing outer cover 20. A sensor 22 (such as a Hall sensor) is fixed on the inner wall of the sensor end cover 11. A trigger plate 23 is fixed to the outside of the bushing 24. The trigger plate 23 passes through the sensor 22. As the trigger plate 23 passes through the bushing 24 and rotates with the motor shaft 4, it triggers the sensor 22 to measure the speed of the motor shaft 4.

[0039] like Figures 6-8 As shown, the junction box 1 includes a box body 25 fixed to the housing 2. The upper cover of the box body 25 is detachable to facilitate wiring operations. The box body 25 contains a wiring cavity 28. Multiple terminal blocks 26 are provided at the bottom of the wiring cavity 28, and multiple terminal posts 27 are arranged side by side on the surface of each terminal block 26.

[0040] The end face of the housing 25 facing away from the casing 2 is the lead wire end face. A lead wire plate 33 is fixed to the surface of the lead wire end face by multiple bolts around the perimeter. Multiple lead wire holes 29 are sequentially opened on the surface of the housing 25, which simultaneously penetrate the lead wire end face and the lead wire plate 33. Multiple sets of clamping blocks 32 are provided on the surface of the lead wire plate 33, and the number of sets of clamping blocks 32 corresponds one-to-one with the terminal block 26.

[0041] Each set of clamping blocks 32 includes two opposing blocks, one above the other, connected by multiple vertically arranged clamping bolts 30. In each set, the upper clamping block 32 is fixed to the surface of the cable outlet plate 33 by clamping bolts 31. On the opposing surfaces of the two clamping blocks 32 in each set, grooves corresponding to the lead-in holes 29 are respectively formed.

[0042] After the internal wiring 34, which is led out from the housing 2, exits into the junction box 1 and is connected to the external wiring 35, which is led out from the outside, through the terminal block 27. After the connection is completed, the clamping bolt 30 is tightened. During the tightening process, the clamping block 32 located at the bottom gradually moves upward under the action of the clamping bolt 30, and finally clamps the external wiring 35.

[0043] In the switched reluctance motor of this application, by setting a clamping block 32 at the outlet of the junction box 1 to clamp the external wiring 35, the wiring is effectively prevented from falling off due to vibration during the operation of the electric locomotive. At the same time, compared with the prior art of using terminals to fix the outlet, its structure is simpler and the cost is lower.

[0044] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A switched reluctance motor, comprising a housing (2), a stator (13) disposed within the housing (2), a rotor (15) disposed at the center of the stator (13), a motor shaft (4) coaxially fixed with the rotor (15) and extending from one end of the housing (2), a junction box (1) disposed on the surface of the housing (2), an inner wiring (34) extending from the housing (2), and an outer wiring (35) extending from the outside into the junction box (1) being correspondingly connected within the junction box (1), characterized in that: A lead hole (29) for external wiring (35) to pass through is provided on the surface of the junction box (1). At least one set of clamping block assemblies is provided on the outer end face of the junction box (1) for clamping external wiring (35) and fixing external wiring (35) to the junction box (1). Each set of clamping block assemblies clamps multiple external wiring (35) at the same time.

2. The switched reluctance motor according to claim 1, characterized in that: Each clamping block assembly includes two clamping blocks (32) arranged opposite to each other. One clamping block (32) is a fixed clamping block fixed to the surface of the junction box (1), and the other clamping block is a movable clamping block. The fixed clamping block and the movable clamping block are connected by a plurality of clamping block bolts (30).

3. A switched reluctance motor according to claim 2, characterised in that: The fixed clamp and the movable clamp are arranged opposite to each other, and grooves corresponding to the external wiring (35) are respectively opened on the opposite surfaces of the fixed clamp and the movable clamp.

4. A switched reluctance motor according to claim 1, characterised in that: At least one terminal block (26) is provided in the inner cavity of the junction box (1), and a terminal post (27) is provided on the surface of each terminal block (26). A corresponding set of inner wires (34) and outer wires (35) are respectively connected to the same terminal post (27).

5. The switched reluctance motor of claim 1, wherein: A set of flow ports are provided on the surface of the housing (2), with the opposite flow ports being the cooling air inlet and the cooling air outlet respectively. Multiple air ducts are provided inside the housing (2), with the beginning and end of the multiple air ducts connected to the cooling air inlet and the cooling air outlet respectively.

6. The switched reluctance motor according to claim 5, characterized in that: The cooling air inlet is a duct (5) located on one end surface of the housing (2), and the cooling air outlet is a louver (3) located on the other end surface of the housing (2).

7. A switched reluctance motor according to claim 5 wherein: The air ducts set in the housing (2) include a first air duct (12) and a second air duct (14). The first air duct (12) is formed between the inner wall of the housing (2) and the stator (13), and the second air duct (14) is formed between adjacent rotor teeth on the surface of the rotor (15).

8. The switched reluctance motor according to claim 6, characterized in that: A mesh plate (9) is also installed at the port of the air duct (5).

9. The switched reluctance motor according to claim 1, characterized in that: The motor shaft (4) is led out from the front end cover (6) of the housing (2). A front bearing (16) is provided in the center hole of the front end cover (6). A front bearing inner cover (17) and a front bearing outer cover (7) are fixed at the inner and outer ends of the front bearing (16) respectively to limit the outer ring of the front bearing (16). A front boss is provided on the surface of the motor shaft (4). The front boss contacts the rear end of the inner ring of the front bearing (16). A sealing ring (8) is also provided at the center hole of the outer cover (7) of the front bearing. The sealing ring (8) and the fixing surface of the outer cover (7) of the front bearing are interlocked in an insertion structure. The inner end of the sealing ring (8) contacts the front end of the inner ring of the front bearing (16).

10. The switched reluctance motor according to claim 1, characterized in that: A rear end cover (10) is provided at the rear end of the housing (2). A rear bearing (19) is provided in the center hole of the rear end cover (10). A rear bearing inner cover (18) and a rear bearing outer cover (20) for limiting the outer ring of the rear bearing (19) are respectively fixed at the inner end and the outer end of the rear bearing (19). A rear boss is provided on the surface of the rear end of the motor shaft (4). The rear boss contacts the front end of the inner ring of the rear bearing (19). An oil slinger (21) is installed at the outer end of the rear bearing (19). The oil slinger (21) contacts the rear end of the inner ring of the rear bearing (19). A bushing (24) is also fitted at the rear end of the motor shaft (4). The bushing (24) contacts the rear end of the oil slinger (21).

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