Railway switch engine driving device and its housing structure

Abstract

This application discloses a rail shunting locomotive drive device and its housing structure, relating to the field of rail locomotive bogie technology. It includes a gear cover, an axle box, and a traction motor. The gear cover comprises an upper gear cover and a lower gear cover, which are fixedly assembled by a first bolt. Both the upper and lower gear covers are integrally cast structures, avoiding defects caused by welding. A gear set is installed inside the gear cover, and gear lubricating oil is provided to achieve power transmission and gear lubrication. One end of the axle box is fixedly assembled to the gear cover by a second bolt. An axle is installed inside the axle box via a support assembly. The traction motor is installed in the axle box by a third bolt. The traction motor drives the axle via the gear set to achieve power output. Because the upper and lower gear covers of this application do not require welding, cracks at the weld seams that could lead to oil leakage are avoided, ensuring the safe operation of the running gear.

Description

Technical Field

[0001] This invention relates to the field of railway locomotive bogie technology, and more particularly to a railway shunting locomotive drive device and its housing structure. Background Technology

[0002] Rail shunting locomotives are shunting and short-distance traction equipment designed specifically for railway stations, ports, industrial and mining enterprises, etc. The core selection factors are traction capacity, curve passability and adaptability to the operating environment.

[0003] Currently, existing railway shunting locomotive drive systems typically consist of a traction motor, transmission gears, gear cover, motor suspension system, and axle box assembly. The gear cover uses a welded steel plate structure, which is prone to cracking at the gear cover mounting base and flange welds during operation, leading to oil leaks and affecting the running gear's operational safety. Furthermore, the welded steel plate structure increases the weight of the gear cover, increasing the force between the wheel and rail and impacting the service life of the bogie components. Summary of the Invention

[0004] The core of this application is to provide a housing structure for a rail shunting locomotive drive unit. The upper and lower gear covers are bolted together to form the gear cover. Both the upper and lower gear covers are integrally cast structures, eliminating the need for welding and thus avoiding welding cracks. The specific solution is as follows:

[0005] A housing structure for a rail shunting locomotive drive unit includes:

[0006] A gear cover includes an upper gear cover and a lower gear cover, which are fixedly assembled by a first bolt; the gear cover is used to install a gear set.

[0007] The axle housing is fixedly mounted to the gear cover at one end by a second bolt. The axle is installed inside the axle housing by a support assembly. The traction motor is installed in the axle housing by a third bolt. The traction motor drives the axle via the gear set.

[0008] Optionally, the mating surfaces of the upper gear cover and the lower gear cover pass through the axis of the axle and the axis of the output shaft of the traction motor.

[0009] Optionally, the angle between the mating surfaces of the upper gear cover and the lower gear cover and the horizontal plane is 0° to 30°.

[0010] Optionally, the upper part of the axle box is provided with a clearance notch, which allows a partial structure of the traction motor to be embedded.

[0011] Optionally, the clearance notch of the axle box and the traction motor form a limiting fit in a direction perpendicular to the third bolt.

[0012] Optionally, the upper gear cover and the lower gear cover are respectively made of aluminum alloy casting.

[0013] This application also provides a rail shunting locomotive drive device, including the rail shunting locomotive drive device housing structure as described in any of the above claims, and further including an axle, a traction motor, a gear set, and a support assembly;

[0014] The gear set includes a drive gear, a gear ring, and a gear hub. The drive gear is connected to the output shaft of the traction motor. The gear ring and the gear hub are fixed relative to each other. The gear hub is fixed to the axle. The drive gear and the gear ring mesh with each other for transmission.

[0015] Optionally, the support assembly includes a shaft collar, two sets of bearings, and two sets of sealing rings. The shaft collar and the inner ring of the bearings are fixed to the axle, and the sealing rings and the outer ring of the bearings are fixed to the axle housing.

[0016] Optionally, a labyrinth seal is used between the collar and the sealing ring, with the collar and sealing ring interlocking.

[0017] The gear hub and the gear cover are connected by a labyrinth seal with interlocking components.

[0018] Optionally, the labyrinth seal between the gear hub and the gear cover is staggered radially along the axle;

[0019] The labyrinth seal between the axle collar and the sealing ring is staggered along the axial direction of the axle.

[0020] This application provides a housing structure for a rail shunting locomotive drive unit, including a gear cover and an axle holder. The gear cover comprises an upper gear cover and a lower gear cover, which are fixedly assembled by a first bolt, eliminating the need for welding and preventing weld cracks. The gear cover houses a gear set for power transmission. One end of the axle holder is fixedly assembled to the gear cover by a second bolt. An axle is mounted inside the axle holder via a support assembly, and a traction motor is mounted on the axle holder by a third bolt. The traction motor drives the axle via the gear set, achieving power output. Because the gear cover of this application is formed by two components bolted together, and both the upper and lower gear covers are integrally cast structures, welding is eliminated, preventing weld cracks and oil leaks, and ensuring the safe operation of the running gear. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a front view of the track shunting locomotive drive unit of this application;

[0023] Figure 2A This is a front sectional view of the track shunting locomotive drive unit of this application;

[0024] Figure 2B for Figure 2A A magnified view of a section within the dashed circle A;

[0025] Figure 2C for Figure 2A A magnified view of a section within the dashed circle B;

[0026] Figure 3 For this Figure 2A Side view section along the AA direction;

[0027] Figure 4 This is a side view of the gear cover.

[0028] Figure 5 This is a frontal sectional view of the bearing box;

[0029] Figure 6 A partial cross-sectional view from the front direction showing the fit between the axle and the support assembly.

[0030] The annotations in the attached figures are explained as follows:

[0031] Gear cover 10; First bolt 101; Upper gear cover 110; Lower gear cover 120;

[0032] 20; 201; 202; 210; clearance notch;

[0033] 30 axles;

[0034] Traction motor 40;

[0035] Gear set 50; drive gear 510; gear ring 520; gear hub 530;

[0036] Support assembly 60; shaft collar 610; bearing 620; sealing ring 630; adjusting shim 640. Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solution of the present invention, the housing structure of the track shunting locomotive drive device of this application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Combination Figure 1 , Figure 2A As shown, the present invention provides a housing structure for a rail shunting locomotive drive device, including a gear cover 10 and an axle clamping box 20, both of which are housing structures.

[0039] The gear cover 10 includes an upper gear cover 110 and a lower gear cover 120, which are two independent structures. The upper gear cover 110 and the lower gear cover 120 are fixed relative to each other to form a cavity structure. The upper gear cover 110 and the lower gear cover 120 are fixedly assembled by first bolts 101. Specifically, connecting flanges are provided on the contacting edges of the upper gear cover 110 and the lower gear cover 120, and several through holes are opened at intervals on the connecting flanges. Several first bolts 101 pass through the connecting flanges to fix the upper gear cover 110 and the lower gear cover 120 relative to each other. The upper gear cover 110 and the lower gear cover 120 together constitute the gear cover 10.

[0040] The inner cavity of the gear cover 10 is used to install the gear set 50, which is used to realize power transmission. The rotation output by the traction motor 40 is transmitted through the gear set 50, driving the axle 30 to rotate. The gear set 50 contains gear lubricating oil to lubricate the gears.

[0041] One end of the axle housing 20 is fixedly assembled to the gear cover 10 by the second bolt 201, in conjunction with... Figure 2A As shown, the right end of the axle housing 20 along its length (X-axis) is fixed to the gear cover 10, thus fixing the axle housing 20 and the gear cover 10 together. An axle 30 is mounted inside the axle housing 20 via a support assembly 60. The axle 30 can rotate relative to the axle housing 20, with the rotation axis along... Figure 2A In the X-axis direction.

[0042] The axle-mounted housing 20 mounts the traction motor 40 via a third bolt 202. The traction motor 40 has a flange structure on its housing for mounting the third bolt 202. The traction motor 40 is fixedly assembled with bolts and is supported by the axle-mounted housing 20. The output shaft of the traction motor 40 drives the axle 30 to rotate via a gear set 50, thus achieving power output.

[0043] This application sets the gear cover 10 as a separate upper gear cover 110 and lower gear cover 120, and fixes them with bolts. This eliminates the need for welding, avoids oil leakage caused by welding cracks, and ensures the safe operation of the running gear.

[0044] In one specific embodiment of this application, the upper gear cover 110 and the lower gear cover 120 are respectively made of aluminum alloy casting. The density of aluminum alloy material is much smaller than that of steel. Compared with the traditional steel plate welding structure, the upper gear cover 110 and the lower gear cover 120 are made of aluminum alloy material, that is, the entire gear cover 10 is made of aluminum alloy material, which can reduce the weight of the entire shell structure, reduce the force between the wheel and the rail, and improve the service life of the bogie components.

[0045] In one specific embodiment of this application, the mating surfaces of the upper gear cover 110 and the lower gear cover 120 pass through the axis of the axle 30 and the axis of the output shaft of the traction motor 40. The edge of the mating surface of the upper gear cover 110 is provided with a semi-circular notch for accommodating the axle 30 and the output shaft of the traction motor 40. Similarly, the edge of the mating surface of the lower gear cover 120 is provided with a semi-circular notch for accommodating the axle 30 and the output shaft of the traction motor 40. When the upper gear cover 110 and the lower gear cover 120 are fixed relative to each other, they together surround the axle 30, and together they surround the output shaft of the traction motor 40. With this structural design, when assembling and connecting the upper gear cover 110 and the lower gear cover 120 to the axle 30 and the output shaft of the traction motor 40, only the upper gear cover 110 and the lower gear cover 120 need to be spliced ​​and fixed, simplifying the assembly process.

[0046] In one specific embodiment of this application, the angle between the mating surfaces of the upper gear cover 110 and the lower gear cover 120 and the horizontal plane is 0°~30°. Figure 3 , Figure 4 As shown, the included angle α represents the angle between the mating surfaces of the upper gear cover 110 and the lower gear cover 120 and the horizontal plane. Since the mating surfaces of the upper gear cover 110 and the lower gear cover 120 need to pass through the axis of the axle 30 and the output shaft axis of the traction motor 40, when the axis of the axle 30 and the output shaft axis of the traction motor 40 are not on the same horizontal plane, an included angle is formed between the mating surfaces of the upper gear cover 110 and the lower gear cover 120 and the horizontal plane.

[0047] In one specific embodiment of this application, combined with Figure 5 As shown, the upper part of the axle box 20 is provided with a clearance notch 210. The clearance notch 210 is a hollowed-out structure in the upper part of the axle box 20. There is no solid structure at the clearance notch 210. The clearance notch 210 is for the partial structure of the traction motor 40 to be embedded.

[0048] Since the clearance gap 210 has no solid structure blocking it, when the traction motor 40 is fixed to the axle box 20, the distance between the output shaft of the traction motor 40 and the axle 30 is smaller, thereby reducing the volume of the gear set 50 and other related structures, which helps to reduce the weight of the entire bogie component.

[0049] In one specific embodiment of this application, the clearance notch 210 of the axle box 20 and the traction motor 40 form a limiting fit in the direction perpendicular to the third bolt 202. That is, the axle box 20 and the traction motor 40 bear the force in the direction perpendicular to the third bolt 202. The third bolt 202 is only subjected to tensile force along its own length direction, and there is almost no shear force perpendicular to its own length direction.

[0050] This application also provides a rail shunting locomotive drive device, including the above-mentioned rail shunting locomotive drive device housing structure, and further including an axle 30, a traction motor 40, a gear set 50, and a support assembly 60.

[0051] Combination Figure 2A As shown, the gear set 50 includes a drive gear 510, a gear ring 520, and a gear hub 530. The drive gear 510 is connected to the output shaft of the traction motor 40, and the output shaft of the traction motor 40 drives the drive gear 510 to rotate.

[0052] The gear hub 530 is fixed to the axle 30. The drive gear 510 and the gear ring 520 mesh with each other for transmission. The gear ring 520 and the gear hub 530 are relatively fixed. The drive gear 510 meshes and drives the gear ring 520 to rotate, which in turn drives the gear hub 530 and the axle 30 to rotate. The gear ring 520 and the gear hub 530 can be relatively fixedly connected by several bolts.

[0053] In one specific embodiment of this application, combined with Figure 2A , Figure 6 As shown, the support assembly 60 includes a shaft collar 610, two sets of bearings 620 and two sets of sealing rings 630. The two sets of bearings 620 form two support positions between the axle 30 and the axle housing 20, and the two sets of sealing rings 630 form two sealing positions between the axle 30 and the axle housing 20.

[0054] The axle collar 610 and the inner ring of the bearing are fixed to the axle 30, and the sealing ring 630 and the outer ring of the bearing are fixed to the axle housing 20. The sealing ring forms a seal at the mating surface of the axle 30 and the axle housing 20.

[0055] Both the gear hub 530 and the shaft collar 610 serve an axial positioning function, such as... Figure 2A As shown, when installing the support assembly on the right, first install the gear hub 530, and then install the bearing 620 with the gear hub 530 as the reference; when installing the support assembly on the left, first install the shaft collar 610, and then install the bearing 620 with the shaft collar 610 as the reference.

[0056] In one specific embodiment of this application, combined with Figure 2BAs shown, a labyrinth seal is used between the shaft collar 610 and the sealing ring 630, which means that a number of interlocking protrusions and recesses are provided at the contact positions of the shaft collar 610 and the sealing ring 630 respectively. The protrusions of the shaft collar 610 are inserted into the recesses of the sealing ring 630, and the protrusions of the sealing ring 630 are inserted into the recesses of the shaft collar 610.

[0057] Combination Figure 2C As shown, a labyrinth seal is used between the gear hub 530 and the gear cover 10, which means that a number of interlocking protrusions and recesses are provided at the contact positions of the gear hub 530 and the gear cover 10. The protrusions of the gear hub 530 are interlocked in the recesses of the gear cover 10 (upper gear cover 110 and lower gear cover 120), and the protrusions of the gear cover 10 (upper gear cover 110 and lower gear cover 120) are interlocked in the recesses of the gear hub 530.

[0058] The labyrinth seal between the shaft collar 610 and the sealing ring 630 and the labyrinth seal between the gear hub 530 and the gear cover 10 adopt different structural forms, specifically, in combination Figure 2B As shown, the labyrinth seal between the axle collar 610 and the sealing ring 630 is staggered along the axial direction of the axle 30, that is, the protrusions and recesses of the axle collar 610 and the sealing ring 630 are interlocked along the axial direction of the axle 30. When assembling the sealing ring 630, the axle collar 610 and the sealing ring 630 are brought closer to each other along the axial direction to achieve the interlocking of the labyrinth seal.

[0059] Combination Figure 2C As shown, the labyrinth seal between the gear hub 530 and the gear cover 10 is radially intersected along the axle 30. When the upper gear cover 110 and the lower gear cover 120 are assembled, the upper gear cover 110 and the lower gear cover 120 are respectively inserted into the gear hub 530 radially to achieve the labyrinth seal insertion of the gear hub 530 and the gear cover 10.

[0060] To ensure the installation accuracy of the sealing ring 630, an adjusting shim can be set at the joint surface of the sealing ring 630 and the bearing housing 20, and the coaxiality of the sealing ring 630 and the bearing housing 20 can be adjusted by adjusting the adjusting shim 640.

[0061] The gear hub 530, the inner ring of the bearing 620, and the shaft collar 610 are sequentially press-fitted onto the axle 30 using an interference fit, with the gear hub 530 serving as the mounting and positioning reference for other components on the axle 30; the transmission end ( Figure 2A (middle right end) and non-transmission end ( Figure 2AThe outer ring of the bearing 620 (middle left end) is installed in the mounting holes at both ends of the bearing housing 20 by a small interference fit; the transmission end sealing ring bearing 620, the non-transmission end sealing ring bearing 620 and the adjusting shim 640 are installed at both ends of the bearing housing 20 by internal hexagon screws, which provide positioning constraints for the bearing 620. At the same time, the adjusting shim 640 can be configured as needed to facilitate the adjustment of the bearing 620 clearance.

[0062] The labyrinth seal improves the sealing performance and prevents the lubricating oil in the gear cover 10 from entering the bearing chamber and contaminating the grease. The labyrinth seal between the non-transmission end sealing ring 630 and the shaft collar 610 forms a dynamic sealing structure to prevent foreign objects from entering the bearing chamber. At the same time, the shaft collar 610 also plays a role in bearing positioning.

[0063] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A housing structure for a rail shunting locomotive drive unit, characterized in that, include: The gear cover (10) includes an upper gear cover (110) and a lower gear cover (120), which are fixedly assembled by a first bolt (101); the gear cover (10) is used to install a gear set (50). A jacking box (20) is fixedly mounted to the gear cover (10) at one end by a second bolt (201). An axle (30) is installed inside the jacking box (20) by a support assembly (60). A traction motor (40) is installed in the jacking box (20) by a third bolt (202). The traction motor (40) drives the axle (30) via the gear set (50).

2. The housing structure of the track shunting locomotive drive device according to claim 1, characterized in that, The mating surfaces of the upper gear cover (110) and the lower gear cover (120) pass through the axis of the axle (30) and the output shaft axis of the traction motor (40).

3. The housing structure of the track shunting locomotive drive device according to claim 2, characterized in that, The angle between the mating surfaces of the upper gear cover (110) and the lower gear cover (120) and the horizontal plane is 0°~30°.

4. The housing structure of the track shunting locomotive drive unit according to any one of claims 1 to 3, characterized in that, The upper part of the bearing box (20) is provided with a clearance notch (210), which allows the partial structure of the traction motor (40) to be embedded.

5. The housing structure of the track shunting locomotive drive device according to claim 4, characterized in that, The clearance notch (210) of the axle box (20) and the traction motor (40) form a limiting fit in the direction perpendicular to the third bolt (202).

6. The housing structure of the track shunting locomotive drive device according to claim 1, characterized in that, The upper gear cover (110) and the lower gear cover (120) are respectively made of aluminum alloy casting.

7. A track shunting locomotive drive device, characterized in that, The track shunting locomotive drive unit housing structure according to any one of claims 1 to 6 further includes an axle (30), a traction motor (40), a gear set (50), and a support assembly (60). The gear set (50) includes a drive gear (510), a gear ring (520), and a gear hub (530). The drive gear (510) is connected to the output shaft of the traction motor (40). The gear ring (520) and the gear hub (530) are fixed relative to each other. The gear hub (530) is fixed to the axle (30). The drive gear (510) and the gear ring (520) mesh with each other for transmission.

8. The rail shunting locomotive drive device according to claim 7, characterized in that, The support assembly (60) includes a shaft collar (610), two sets of bearings (620) and two sets of sealing rings (630). The shaft collar (610) and the inner ring of the bearing are fixed to the axle (30), and the sealing ring (630) and the outer ring of the bearing are fixed to the axle housing (20).

9. The rail shunting locomotive drive device according to claim 8, characterized in that, The collar (610) and the sealing ring (630) are connected by a labyrinth seal with interlocking fittings; The gear hub (530) and the gear cover (10) are connected by a labyrinth seal with interlocking components.

10. The rail shunting locomotive drive device according to claim 9, characterized in that, The labyrinth seal between the gear hub (530) and the gear cover (10) is radially intersected along the axle (30); The labyrinth seal between the axle collar (610) and the sealing ring (630) is interlaced along the axial direction of the axle (30).

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