Switched reluctance motor with braking function for loom

Abstract

The application discloses a switched reluctance motor with a braking function for a loom, and belongs to the technical field of switched reluctance motors. The switched reluctance motor comprises a shell (3), a brake is arranged at one end of a motor shaft (1), the brake comprises a brake disc (14) and a brake coil (13), characterized in that a brake seat (5) is fixed at an end cover of one end of the shell (3), the brake coil (13) is fixed on the surface of the brake seat (5), a rear positioning table (9) is formed on the surface of the motor shaft (1), a positioning locking mechanism is clamped and fixed at the rear positioning table (9), and the brake disc (14) is fixed on the inner side of the brake coil (13) through the positioning locking mechanism. In the switched reluctance motor with the braking function for the loom, the rear positioning table is formed on the surface of the motor shaft, and the brake disc is fixed through the positioning locking mechanism at the rear positioning table, so that the brake disc position adjusting defect in the prior art is avoided.

Description

Technical Field

[0001] A switched reluctance motor for looms with braking function belongs to the field of switched reluctance motor technology. Background Technology

[0002] Switched reluctance motors (SRMs) are variable reluctance motors with doubly salient poles on both 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. The application of SRMs in looms can fully utilize these inherent characteristics. However, when SRMs are used in looms, the most traditional braking method after the motor stops is to rely on a clutch brake installed on the loom's main shaft. This significantly increases the load and wear rate of the clutch brake, resulting in a high failure rate.

[0003] To address the aforementioned problems with looms, the applicant of this application filed a Chinese utility model patent (application number 202120490255.6) on March 8, 2021, entitled "A Switched Reluctance Motor Applied to a Loom," which describes a technical solution. In this solution, the brake is mounted on the motor shaft, thus avoiding the time-consuming and labor-intensive process of repairing, replacing, and disassembling the brake when it is mounted on the main shaft of the loom, which is problematic when the brake is damaged.

[0004] However, during long-term implementation of the above-mentioned technical solution, the applicant discovered the following defects: The brake in this technical solution consists of a brake coil and a brake disc. The brake coil is fixed to the end cover of the housing, and the brake disc is located outside the brake coil and coaxially fixed to the motor shaft. This fixing method requires further adjustment of the brake disc position after fixing the brake coil during installation and debugging, making the process quite complex. Furthermore, in this technical solution, the cooling fan located at the end of the motor shaft is actually installed on the side of the brake disc. In actual use, it was found that after long-term use, this installation method causes the cooling fan to affect the position of the brake disc, further impacting the braking effect of the brake. 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 for looms with braking function, which is provided by opening a rear positioning platform on the surface of the motor shaft and fixing the brake disc at the rear positioning platform by a positioning locking mechanism, thus avoiding the drawback of needing to adjust the position of the brake disc in the prior art.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The switched reluctance motor for looms with braking function includes a housing, and the two ends of the motor shaft are respectively led out from the end caps at both ends of the housing. A brake is installed at one end of the motor shaft. The brake includes a brake disc and a brake coil. The feature is that a brake seat is fixed at the end cap at one end of the housing, the brake coil is fixed on the surface of the brake seat, a rear positioning platform is provided on the surface of the motor shaft, and a positioning locking mechanism is fixed at the rear positioning platform. The brake disc is fixed to the inside of the brake coil through the positioning locking mechanism.

[0007] Preferably, the positioning and locking mechanism includes a locking bushing and a connecting sleeve. The locking bushing is locked at the rear positioning platform, and the connecting sleeve has an inner mounting groove at one end facing the motor shaft. The connecting sleeve is fitted onto the end of the motor shaft through the inner mounting groove, and the brake disc is locked and fixed between the locking bushing and the connecting sleeve.

[0008] Preferably, a boss is provided on the surface of the locking bushing, and the brake disc is fitted onto the outside of the locking bushing and locked onto the boss on the surface of the locking bushing.

[0009] Preferably, an external mounting groove is provided at the end of the connecting sleeve facing away from the motor shaft, a fan connecting shaft is coaxially fixed in the external mounting groove, and a cooling fan is installed at the end of the fan connecting shaft.

[0010] Preferably, a sensor cavity is formed between the brake seat and the fixed seat, and a rotary transformer is provided in the sensor cavity. The stator of the rotary transformer is fixed to the surface of the end cover, and the rotor of the rotary transformer is coaxially fixed to the motor shaft through a rotor fixing mechanism.

[0011] Preferably, a front positioning platform is provided on the surface of the motor shaft, the front positioning platform is located inside the rear positioning platform, and the rotor fixing mechanism includes a bushing and a pressure cover that are simultaneously fitted on the outside of the motor shaft. The bushing is locked at the front positioning platform, the pressure cover is fixed at the end of the bushing, and the rotary transformer rotor is located between the pressure cover and the bushing.

[0012] Preferably, a boss is provided on the surface of the bushing, and the rotary transformer rotor is fitted onto the outside of the bushing and locked onto the boss on the surface of the bushing.

[0013] Compared with the prior art, the beneficial effects of this utility model are: In the switched reluctance motor for looms with braking function of this application, by opening a rear positioning platform on the surface of the motor shaft and fixing the brake disc at the rear positioning platform by a positioning locking mechanism, the drawback of needing to adjust the position of the brake disc in the prior art is avoided.

[0014] The brake disc is fixed to the motor shaft by a positioning and locking mechanism. There is no connection between the cooling fan and the brake disc, which avoids the influence of the cooling fan on the brake disc and ensures the braking effect.

[0015] A front positioning platform is also provided on the motor shaft, and the rotor of the rotary transformer is positioned at the front positioning platform by the cooperation of the pressure cover and the shaft sleeve. Attached Figure Description

[0016] Figure 1 A partial sectional view of a switched reluctance motor for looms with braking function.

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0018] The components include: 1. Motor shaft; 2. Front end cover; 3. Housing; 4. Protective cover; 5. Brake seat; 6. Rear end cover; 7. Rotary transformer stator; 8. Front positioning platform; 9. Rear positioning platform; 10. Connecting sleeve; 11. Cooling fan; 12. Fan connecting shaft; 13. Brake coil; 14. Brake disc; 15. Rotary transformer rotor; 16. Shaft sleeve; 17. Pressure cover; 18. Locking shaft sleeve. Detailed Implementation

[0019] Figures 1-2 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-2 The present invention will be further described below.

[0020] like Figure 1 As shown, a switched reluctance motor for looms with braking function (hereinafter referred to as a switched reluctance motor) includes a housing 3, with a front cover 2 and a rear cover 6 fixed at the front and rear ends of the housing 3, respectively. Similar to the prior art, a motor stator and a motor rotor are arranged inside the housing 3. The motor rotor is rotatably located inside the motor stator. A motor shaft 1 is coaxially fixed at the center of the motor rotor. The front end of the motor shaft 1 extends from the center of the front cover 2 and serves as the output shaft of this switched reluctance motor.

[0021] A brake seat 5 is provided on the outer side of the rear end cover 6. The brake seat 5 is coaxially fixed to the rear end cover 6 by multiple bolts around its perimeter. The rear end of the motor shaft 1 passes through the rear end cover 6 and the brake seat 5 in sequence. At the same time, a sensor cavity for this switched reluctance motor is formed between the brake seat 5 and the rear end cover 6. In this switched reluctance motor, the sensor set in the sensor cavity is implemented using a rotary transformer.

[0022] Combination Figure 2A front positioning platform 8 and a rear positioning platform 9 are sequentially provided at the rear end of the motor shaft 1, with the front positioning platform 8 located within the sensor cavity. A bushing 16 is heat-fitted and fixed to the outer ring of the motor shaft 1, with the front end of the bushing 16 engaging with the front positioning platform 8. A boss is also provided on the surface of the bushing 16. The rotary transformer rotor 15 is fitted onto the outer ring of the bushing 16, and the inner end of the rotary transformer rotor 15 is engaged with the boss on the surface of the bushing 16. A pressure cap 17 is also bolted to the end of the bushing 16, abutting against the outer end of the rotary transformer rotor 15. Therefore, the rotary transformer rotor 15 is positioned by the cooperation of the pressure cap 17 and the bushing 16.

[0023] The rotary transformer stator 7 is bolted to the surface of the rear end cover 6 and engages with the rotary transformer rotor 15. When the rotary transformer rotor 15 rotates with the motor shaft 1, the rotational speed signal of this switched reluctance motor is output through the rotary transformer stator 7. In the switched reluctance motor of this application, the installation position of the bushing 16 is determined by the front positioning platform 8, and then the installation position of the rotary transformer rotor 15 is further determined by the boss on the surface of the bushing 16. Since the position of the rotary transformer rotor 15 is already determined, the relative position between the rotary transformer rotor 15 and the rotary transformer stator 7 can be determined after the rotary transformer stator 7 is installed in the preset position. Therefore, there is no need to further adjust the position of the rotary transformer stator 7, achieving precise positioning of the rotary transformer and ensuring its installation accuracy.

[0024] The rear positioning platform 9 is located outside the front positioning platform 8. A locking sleeve 18 is fitted onto the rear positioning platform 9, passing through the center hole of the brake seat 5. The inner end of the locking sleeve 18 is engaged with the rear positioning platform 9. A boss is formed on the surface of the locking sleeve 18, and a brake disc 14 is fitted onto the boss on the surface of the locking sleeve 18. A connecting sleeve 10 is bolted to the end of the motor shaft 1.

[0025] The connecting sleeve 10 has mounting grooves at both ends. The mounting groove at the inner end of the connecting sleeve 10 covers the end of the motor shaft 1. A fan connecting shaft 12 is fixed in the mounting groove at the outer end of the connecting sleeve 10 by bolts. The rear end of the fan connecting shaft 12 extends to the protective cover 4, and a cooling fan 11 is fixed at the end of the fan connecting shaft 12.

[0026] A brake coil 13 is also fitted outside the connecting sleeve 10, and the brake coil 13 is fixed to the outer end face of the brake seat 5 by multiple bolts around its outer circumference. The connecting sleeve 10 and the fan connecting shaft 12 both pass through the center of the brake coil 13. In combination with the above, the boss on the surface of the locking bushing 18 and the connecting sleeve 10 installed at the end of the motor shaft 1 jointly position the brake disc 14 to ensure the distance between the brake disc 14 and the brake coil 13. This effectively avoids the drawback of the existing brake structure, where the position of the brake disc 14 still needs to be adjusted after the brake coil 13 is fixed. At the same time, placing the brake disc 14 inside the brake coil 13 avoids the influence of external structures on the position of the brake disc 14, thus ensuring the braking effect.

[0027] 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 for a loom with braking function, comprising a housing (3), with both ends of a motor shaft (1) extending from end caps at both ends of the housing (3), and a brake installed at one end of the motor shaft (1), the brake comprising a brake disc (14) and a brake coil (13), characterized in that: A brake seat (5) is fixed at one end of the housing (3), and a brake coil (13) is fixed on the surface of the brake seat (5). A rear positioning platform (9) is provided on the surface of the motor shaft (1), and a positioning locking mechanism is fixed at the rear positioning platform (9). The brake disc (14) is fixed to the inside of the brake coil (13) through the positioning locking mechanism.

2. The switched reluctance motor for looms with braking function according to claim 1, characterized in that: The positioning and locking mechanism includes a locking bushing (18) and a connecting sleeve (10). The locking bushing (18) is locked at the rear positioning platform (9). The connecting sleeve (10) has an inner mounting groove at one end facing the motor shaft (1). The connecting sleeve (10) is fitted onto the end of the motor shaft (1) through the inner mounting groove. The brake disc (14) is fixed between the locking bushing (18) and the connecting sleeve (10).

3. The switched reluctance motor for looms with braking function according to claim 2, characterized in that: A boss is provided on the surface of the locking bushing (18), and the brake disc (14) is fitted on the outside of the locking bushing (18) and is locked on the boss on the surface of the locking bushing (18).

4. The switched reluctance motor for looms with braking function according to claim 2, characterized in that: An external mounting groove is provided at one end of the connecting sleeve (10) facing away from the motor shaft (1), and a fan connecting shaft (12) is coaxially fixed in the external mounting groove. A cooling fan (11) is installed at the end of the fan connecting shaft (12).

5. The switched reluctance motor for looms with braking function according to claim 1, characterized in that: A sensor cavity is formed between the brake seat (5) and the rear end cover (6). A rotary transformer is installed in the sensor cavity. The stator (7) of the rotary transformer is fixed on the end cover surface. The rotor (15) of the rotary transformer is coaxially fixed with the motor shaft (1) through a rotor fixing mechanism.

6. The switched reluctance motor for a loom with braking function according to claim 5, characterized in that: A front positioning platform (8) is provided on the surface of the motor shaft (1). The front positioning platform (8) is located inside the rear positioning platform (9). The rotor fixing mechanism includes a bushing (16) and a cover (17) that are simultaneously fitted on the outside of the motor shaft (1). The bushing (16) is locked at the front positioning platform (8), and the cover (17) is fixed at the end of the bushing (16). The rotary transformer rotor (15) is located between the cover (17) and the bushing (16).

7. The switched reluctance motor for looms with braking function according to claim 6, characterized in that: A boss is provided on the surface of the bushing (16). The rotary transformer rotor (15) is fitted onto the outside of the bushing (16) and is locked onto the boss on the surface of the bushing (16).

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