An asynchronous self-cooling grinding motor for a rail grinding vehicle

Abstract

This utility model discloses an asynchronous self-cooling grinding motor for rail grinding vehicles, relating to the field of motor technology. It includes a motor spindle, motor rotor, shaft extension end bearing, non-shaft extension end bearing, motor stator, motor base, grinding head mounting plate, and motor heat dissipation unit. The heat dissipation performance of this grinding motor is significantly improved. The heat dissipation unit and heat dissipation guide plate effectively increase the heat dissipation area, allowing the heat generated during motor operation to dissipate quickly, thereby reducing the motor's operating temperature, improving its efficiency and service life, reducing downtime for maintenance due to overheating or bearing failure, and improving the efficiency and quality of grinding operations. This utility model achieves significant improvements and enhancements in heat dissipation performance, bearing structure, ease of installation and maintenance, and overall performance and reliability, better meeting the application needs of rail grinding vehicles in railway line maintenance.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to an asynchronous self-cooling grinding motor for a rail grinding vehicle. Background Technology

[0002] Rail grinding is a crucial part of railway track maintenance. With the rapid development of railway transportation, problems such as rail wear and wavy wear have become increasingly prominent, seriously affecting driving safety and comfort. Rail grinding vehicles, as a highly efficient maintenance equipment, are widely used in railway track maintenance operations. The grinding motor, as one of the core components of the rail grinding vehicle, directly affects the efficiency and quality of the grinding operation.

[0003] Currently, traditional grinding motors used in rail grinding vehicles have several problems. Firstly, their heat dissipation is insufficient. During prolonged grinding operations, the motor generates a significant amount of heat. If this heat cannot be dissipated effectively, it will overheat, affecting its efficiency and lifespan. Secondly, the bearing structure design is not optimized. Bearings bear substantial loads and friction during motor operation. Traditional bearing structures are prone to wear and loosening, leading to unstable motor operation or even malfunctions, disrupting grinding operations. Furthermore, traditional grinding motors present certain inconveniences in installation and maintenance, increasing repair costs and time. Utility Model Content

[0004] The purpose of this utility model is to provide an invention or utility model name to solve the problems mentioned in the background art, such as insufficient heat dissipation performance, unoptimized bearing structure design, and certain inconveniences in installation and maintenance, which increase maintenance costs and time.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an asynchronous self-cooling grinding motor for a rail grinding vehicle, comprising a motor spindle with a motor rotor located at the middle position, a spindle extension bearing portion located at the spindle extension end, and a non-spindle extension bearing portion located at the non-spindle extension end. A motor stator portion is jointly provided by the spindle extension bearing portion and the non-spindle extension bearing portion, and a motor base is provided on the outer side of the motor stator portion. A grinding head fixing plate is provided at the end of the spindle extension end, and a motor heat dissipation portion is provided at the end of the non-spindle extension end. The motor spindle includes components extending from the spindle extension side to the non-spindle extension side... The grinding head mounting shaft, shaft extension bearing mounting shaft, main shaft rough diameter, main shaft body, non-shaft extension bearing mounting shaft, and main shaft threaded section are coaxially arranged. The motor rotor includes a rotor core sleeved on the outside of the main shaft body, with a rotor squirrel cage passing through it. The shaft extension bearing section includes a shaft extension bearing with an interference fit mounted on the shaft extension bearing mounting shaft, and a shaft extension end cap is provided on the outer side of the outer ring of the shaft extension bearing. The non-shaft extension bearing section includes a non-shaft extension bearing with an interference fit mounted on the non-shaft extension bearing mounting shaft, and a stop is provided on the non-shaft extension side of the non-shaft extension bearing. The retaining washer has a locking nut threaded onto the main shaft thread on its non-extension side; the non-extension bearing has an inner cover on its extension side and an end cover on its non-extension side, and a bolted motor base is provided between the non-extension end cover and the extension end cover at their outermost edges; the motor base includes a cylindrical base cylinder, and a motor stator is provided on the inner wall of the base cylinder; the motor stator includes a cylindrical stator core and a stator coil passes through it, the portion of the stator coil extending beyond the stator core... Thermally conductive silicone is filled between the grinding head and the base cylinder. The grinding head fixing plate includes a fixing plate mounting sleeve sleeved on the outside of the grinding head fixing plate mounting shaft. A coaxial fixing plate is provided on the outside of the shaft extension end of the fixing plate sleeve. A stepped through hole is provided at the center of the fixing plate. The grinding head fixing plate is fixedly connected to the grinding head fixing plate mounting shaft with bolts. The motor heat dissipation part includes a heat dissipation plate sleeved on the outside of the spindle threaded part. The heat dissipation plate is locked and fixed at the tail end of the spindle threaded part by a threaded locking bolt.

[0006] Preferably, the side of the inner ring of the shaft extension bearing on the non-shaft extension side abuts against the shaft extension side of the main shaft's diameter. The shaft extension bearing is provided with an outer cover on the shaft extension side and an inner cover on the non-shaft extension side. The outer cover, the end cover, and the inner cover are connected as a single unit by bolts.

[0007] Preferably, a shaft extension end labyrinth ring is provided between the outer cover of the shaft extension end bearing and the shaft extension end bearing.

[0008] Preferably, the side edge of the non-shaft extension end bearing inner ring abuts against the non-shaft extension side of the main shaft body.

[0009] Preferably, a plurality of outwardly extending heat dissipation guide plates are evenly distributed in a ring on the outer wall of the base cylinder, and a junction box and a lifting ring are provided on the outer side of the top end of the base cylinder.

[0010] Preferably, the tail end of the mounting sleeve of the fixed disk is inserted into the bearing cover of the shaft extension end to form a sealing surface. The fixed disk is provided with multiple through holes for connecting grinding heads in a ring evenly distributed near the edge, and the grinding heads are fixed with bolts.

[0011] Preferably, the heat sink has radial grooves.

[0012] Preferably, a non-axial extension end labyrinth ring is provided between the heat sink and the non-axial extension end cap.

[0013] Preferably, a protective cover is provided on the outer side of the heat sink, and the protective cover is connected and fixed to the non-shaft extension end cap by bolts.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The heat dissipation performance of the grinding motor provided by this utility model is significantly improved. The use of the motor heat dissipation part and heat dissipation guide plate can effectively increase the heat dissipation area, so that the heat generated by the motor during operation can be quickly dissipated, thereby reducing the working temperature of the motor and improving its working efficiency and service life.

[0016] 2. The optimized bearing structure improves operational stability. The added labyrinth rings effectively prevent the leakage of dust, impurities, and lubricating oil, extending the service life of the bearing. They also help keep the inside of the motor clean and improve its operational reliability.

[0017] 3. The asynchronous self-cooling grinding motor for rail grinding vehicles of this utility model optimizes heat dissipation and bearing structure, enabling the motor to maintain good working condition during long-term operation. This reduces downtime for maintenance due to overheating or bearing failure, improving the efficiency and quality of grinding operations. Simultaneously, its optimized design extends the motor's service life, reduces equipment replacement costs, and provides a more reliable and efficient drive component for railway line maintenance, demonstrating significant economic and social benefits.

[0018] In summary, the asynchronous self-cooling grinding motor for rail grinding vehicles of this invention has achieved significant improvements and enhancements in terms of heat dissipation performance, bearing structure, ease of installation and maintenance, as well as overall performance and reliability, and can better meet the application needs of rail grinding vehicles in railway line maintenance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the present invention;

[0020] Figure 2 for Figure 1 Structural diagram;

[0021] Figure 3 for Figure 2 Enlarged view of A in the middle;

[0022] Figure 4 for Figure 2 Enlarged view of B in the middle;

[0023] In the diagram: Motor spindle-1, spindle body-11, spindle diameter-12, shaft extension end bearing mounting shaft-13, grinding head mounting plate mounting shaft-14, non-shaft extension end bearing mounting shaft-15, spindle threaded section-16, motor rotor-2, rotor core-21, rotor squirrel cage-22, shaft extension end bearing section-3, shaft extension end bearing-31, shaft extension end bearing outer cover-32, shaft extension end bearing inner cover-33, shaft extension end end cover-34, shaft extension end labyrinth ring-35, non-shaft extension end bearing section-4, non-shaft extension end bearing-41, locking washer- 42, Locking nut - 43, Inner cover of bearing at non-shaft extension end - 44, End cover at non-shaft extension end - 45, Motor stator section - 5, Stator core - 51, Stator coil - 52, Thermal conductive silicone - 53, Motor base - 6, Base cylinder - 61, Heat dissipation guide plate - 62, Junction box - 63, Lifting ring - 64, Grinding head fixing plate - 7, Fixing plate mounting sleeve - 71, Fixing plate - 72, Stepped through hole - 73, Grinding head connection through hole - 74, Motor heat dissipation section - 8, Heat dissipation plate - 81, Labyrinth ring at non-shaft extension end - 82, Protective cover - 83. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0025] Please refer to Figure 1-4 , Figure 1 This is a schematic diagram of the present invention; Figure 2 for Figure 1 Structural diagram; Figure 3 for Figure 2 Enlarged view of A in the middle; Figure 4 for Figure 2A magnified view of B in the middle.

[0026] This utility model provides an asynchronous self-cooling grinding motor for a rail grinding vehicle, including a motor spindle 1. The motor spindle 1 is provided with a motor rotor 2 located in the middle position, a spindle extension bearing 3 located at the spindle extension end, and a non-spindle extension bearing 4 located at the non-spindle extension end. A motor stator 5 is provided together by the spindle extension bearing 3 and the non-spindle extension bearing 4. A motor base 6 is provided on the outside of the motor stator 5. A grinding head fixing plate 7 is provided at the end of the spindle extension end of the motor spindle 1, and a motor heat dissipation part 8 is provided at the end of the non-spindle extension end.

[0027] The motor spindle 1 includes a cylindrical spindle body 11 located in the middle and a motor rotor 2 sleeved on its outer side. The spindle body 11 has a radially thickened spindle diameter 12 on its shaft extension side. The shaft extension side of the spindle diameter 12 has a shaft extension end bearing mounting shaft 13 with the same diameter as the spindle body 11 and a shaft extension end bearing part 3 is mounted thereon. The shaft extension side of the shaft extension end bearing mounting shaft 13 has a grinding head fixing disc mounting shaft 14 with a truncated cone shape for mounting the grinding head fixing disc 7. The non-shaft extension side of the spindle body 11 has a radially reduced diameter non-shaft extension end bearing mounting shaft 15 and a non-shaft extension end bearing part 4 is mounted thereon. The non-shaft extension end of the non-shaft extension end bearing mounting shaft 15 has a spindle thread part 16, and a motor heat dissipation part 8 is mounted at the end of the spindle thread part 16.

[0028] The motor rotor 2 includes a rotor core 21 that is sleeved on the outside of the main shaft body 11 and fixedly installed, and a rotor cage 22 is inserted inside the rotor core 21.

[0029] The shaft extension bearing section 3 includes a shaft extension bearing 31, which is interference-fitted onto the shaft extension bearing mounting shaft 13 and is mainly used to bear radial force. The side of the inner ring of the shaft extension bearing 31 on the non-shaft extension side abuts against the shaft extension side of the main shaft diameter 12. The shaft extension bearing 31 is provided with a shaft extension bearing outer cover 32 on the shaft extension side and a shaft extension bearing inner cover 33 on the non-shaft extension side. A shaft extension end cover 34 is provided on the outer side of the outer ring of the shaft extension bearing 31. The shaft extension bearing outer cover 32, shaft extension end cover 34 and shaft extension bearing inner cover 33 are connected as a whole by bolts. A shaft extension end labyrinth ring 35 is provided between the shaft extension end bearing outer cover 32 and the shaft extension end bearing 31. The shaft extension end labyrinth ring 35 and the shaft extension end bearing outer cover 32 form a labyrinth structure, which serves to prevent dust from entering the motor bearing.

[0030] The non-shaft extension end bearing part 4 includes a non-shaft extension end bearing 41 that is interference-fitted onto the non-shaft extension end bearing mounting shaft 15. The side edge of the shaft extension side of the inner ring of the non-shaft extension end bearing 41 abuts against the non-shaft extension side of the main shaft body 11. A locking washer 42 is provided on the non-shaft extension side of the non-shaft extension end bearing 41. A locking nut 43 threaded onto the main shaft thread part 16 is provided on the non-shaft extension side of the locking washer 42. The non-shaft extension end bearing 41 and the locking nut 43 together mainly bear the axial force. A non-shaft extension end bearing inner cover 44 is provided on the shaft extension side of the non-shaft extension end bearing 41, and a non-shaft extension end cover 45 is provided on the non-shaft extension side. A motor base 6 is provided together between the non-shaft extension end cover 45 and the shaft extension end cover 34 at their outermost edges and is fixed by bolts.

[0031] The motor base 6 includes a cylindrical base cylinder 61. Multiple heat dissipation guide plates 62 extending outward are evenly distributed in a ring on the outer wall of the base cylinder 61. A junction box 63 and a lifting ring 64 are provided on the outer side of the top of the base cylinder 61. The motor stator part 5 is provided on the inner wall of the base cylinder 61.

[0032] The motor stator 5 includes a cylindrical stator core 51, and a stator coil 52 is inserted inside the stator core 51. The portion of the stator coil 52 extending beyond the stator core 51 is filled with thermally conductive silicone 53 between itself and the motor base cylinder 61, which is used to quickly conduct the heat of the stator coil 52 to the motor base 6.

[0033] The grinding head mounting plate 7 includes a mounting sleeve 71 that is sleeved on the outside of the grinding head mounting plate mounting shaft 14. The tail of the mounting sleeve 71 is inserted into the bearing cover 32 at the shaft extension end to form a sealing surface. A coaxial mounting plate 72 is provided on the outside of the shaft extension end of the grinding head mounting plate mounting shaft 14. A stepped through hole 73 is provided at the axial center of the mounting plate 72, and the grinding head mounting plate 7 is fixedly connected to the grinding head mounting plate mounting shaft 14 with bolts. The mounting plate 72 has a plurality of through grinding head connection through holes 74 evenly distributed in a ring near the edge, and grinding heads are fixed thereon with bolts.

[0034] The motor heat dissipation part 8 includes a heat dissipation plate 81 sleeved on the outside of the main shaft threaded part 16. The heat dissipation plate 81 is locked and fixed at the tail end of the main shaft threaded part 16 by a threaded locking bolt. The heat dissipation plate 81 has radial grooves. When the motor main shaft 1 rotates, the grooves on the heat dissipation plate 81 form a centrifugal fan effect, which carries away the heat of the electric rotor 2. A non-shaft extension end labyrinth ring 82 is provided between the heat dissipation plate 81 and the non-shaft extension end cover 45. In addition, a protective cover 83 is provided on the outside of the heat dissipation plate 81, and the protective cover 83 is connected and fixed to the non-shaft extension end cover 45 by bolts to prevent the heat dissipation plate from being bumped or knocked when it rotates.

[0035] Although embodiments of the present invention have been shown and described, it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, it will be understood by those skilled in the art that all other embodiments obtained by making various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the present invention and without creative effort are within the scope of protection of the present invention.

Claims

1. An asynchronous self-cooling grinding motor for a rail grinding vehicle, characterized in that: The motor includes a main shaft (1) on which a motor rotor (2) is mounted in the middle position, a shaft extension bearing (3) at the shaft extension end and a non-shaft extension bearing (4) at the non-shaft extension end. A motor stator (5) is provided together by the shaft extension bearing (3) and the non-shaft extension bearing (4). A motor base (6) is provided on the outside of the motor stator (5). A grinding head fixing plate (7) is provided at the end of the shaft extension end of the main shaft (1), and a motor heat dissipation part (8) is provided at the end of the non-shaft extension end. The main shaft (1) includes a grinding head fixing plate mounting shaft (14), a shaft extension bearing mounting shaft (13), and a main shaft, which are coaxially arranged from the shaft extension side to the non-shaft extension side. The main shaft consists of a coarse diameter (12), a main shaft body (11), a non-shaft extension end bearing mounting shaft (15), and a main shaft threaded portion (16). The motor rotor (2) includes a rotor core (21) sleeved on the outside of the main shaft body (11) and a rotor squirrel cage (22) passing through it. The shaft extension end bearing portion (3) includes a shaft extension end bearing (31) with an interference fit mounted on the shaft extension end bearing mounting shaft (13), and a shaft extension end cap (34) is provided on the outer side of the outer ring of the shaft extension end bearing (31). The non-shaft extension end bearing portion (4) includes a non-shaft extension end bearing (41) with an interference fit mounted on the non-shaft extension end bearing mounting shaft (15), and the non-shaft extension end bearing (41) has a non-shaft extension end bearing (41) with an interference fit mounted on the non-shaft extension end bearing mounting shaft (15). A retaining washer (42) is provided on the extended side, and a locking nut (43) threaded onto the main shaft thread (16) is provided on the non-shaft extension side of the retaining washer (42); a non-shaft extension end bearing inner cover (44) is provided on the shaft extension side of the non-shaft extension end bearing (41), and a non-shaft extension end cover (45) is provided on the non-shaft extension side; a motor base (6) is bolted together between the non-shaft extension end cover (45) and the shaft extension end cover (34) at their outermost edges; the motor base (6) includes a cylindrical base cylinder (61), and a motor stator part (5) is provided on the inner wall of the base cylinder (61); the motor stator part (5) includes a cylindrical stator. The iron core (51) is provided with a stator coil (52) inside it. The portion of the stator coil (52) extending beyond the stator iron core (51) is filled with thermally conductive silicone (53) between it and the machine base cylinder (61). The grinding head fixing plate (7) includes a fixing plate mounting sleeve (71) sleeved on the outside of the grinding head fixing plate mounting shaft (14). The fixing plate mounting sleeve (71) has a coaxial fixing plate (72) on the outside of the shaft extension end of the grinding head fixing plate mounting shaft (14). The fixing plate (72) has a stepped through hole (73) at the shaft center. The grinding head fixing plate (7) is fixedly connected to the grinding head fixing plate mounting shaft (14) with bolts.The motor heat dissipation part (8) includes a heat dissipation disc (81) sleeved outside the main shaft threaded part (16), and the heat dissipation disc (81) is locked and fixed by a locking bolt threaded at the tail end of the main shaft threaded part (16).

2. The asynchronous self-cooling structure polishing motor for rail grinding car according to claim 1, characterized in that: The side of the inner ring of the shaft extension bearing (31) on the non-shaft extension side abuts against the shaft extension side of the main shaft diameter (12). The shaft extension bearing (31) is provided with a shaft extension bearing outer cover (32) on the shaft extension side and a shaft extension bearing inner cover (33) on the non-shaft extension side. The shaft extension bearing outer cover (32), shaft extension end cover (34), and shaft extension bearing inner cover (33) are connected as a whole by bolts.

3. The asynchronous self-cooling grinding motor for rail grinding vehicles according to claim 2, characterized in that: A shaft extension end labyrinth ring (35) is provided between the outer cover (32) of the shaft extension end bearing and the shaft extension end bearing (31).

4. The asynchronous self-cooling structure polishing motor for rail grinding car according to claim 3, characterized in that: The side edge of the inner ring of the non-shaft extension end bearing (41) abuts against the non-shaft extension side of the main shaft body (11).

5. The asynchronous self-cooled structure polishing motor for rail grinding car according to claim 4, characterized in that: Multiple heat dissipation guide plates (62) extending outward are evenly distributed in a ring on the outer wall of the base cylinder (61). At the same time, a junction box (63) and a lifting ring (64) are provided on the outer side of the top of the base cylinder (61).

6. The asynchronous self-cooled structure polishing motor for rail grinding car according to claim 5, characterized in that: The tail of the mounting sleeve (71) of the fixed disk is inserted into the outer cover (32) of the bearing at the shaft extension end to form a sealing surface. The fixed disk (72) is provided with multiple through holes (74) for connecting grinding heads in a ring evenly distributed near the edge, and grinding heads are fixed with bolts.

7. The asynchronous self-cooled structure polishing motor for rail grinding car according to claim 6, characterized in that: The heat sink (81) has radial grooves.

8. The asynchronous self-cooled structure polishing motor for rail grinding car according to claim 7, characterized in that: A non-axial extension end labyrinth ring (82) is provided between the heat sink (81) and the non-axial extension end cap (45).

9. The asynchronous self-cooled structure polishing motor for rail grinding car according to claim 8, characterized in that: A protective cover (83) is provided on the outside of the heat sink (81), and the protective cover (83) is connected and fixed to the non-shaft extension end cap (45) by bolts.

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