CN107917180A - A kind of transmission case for diesel locomotive - Google Patents

Abstract

The invention discloses a transmission box for a diesel locomotive, which comprises a generator connection assembly, an input shaft assembly and a starter motor connection assembly arranged in the transmission box body; the transmission box body includes an upper box body and a lower box body; an input assembly Mesh with the generator connection assembly and the starter motor connection assembly respectively; the generator connection assembly includes a first connection shaft; the first connection shaft is sleeved with a first gear that is close to its stepped surface and fits with the first connection shaft through a taper ; The first connecting shaft at the right end of the first gear is provided with a first distance ring and a sealing structure, and the first connecting shaft at the left end of the first gear is provided with a second distance ring, a first pressure plate and a transmission box A first end cap connected to the body.

Description

Transmission box for diesel locomotive

technical field

The invention belongs to the technical field of transmission boxes, and in particular relates to a transmission box for diesel locomotives.

Background technique

A diesel locomotive is a locomotive that uses an internal combustion engine as a driving force to drive wheels through a transmission. According to the type of internal combustion engine on the locomotive, the vast majority of internal combustion engines used on my country's railways are diesel engines. Fuel (diesel) burns in the cylinder and converts heat energy into mechanical energy output by the diesel crankshaft, but it is not used to directly drive the driving wheel, but is converted into mechanical energy suitable for the traction characteristics of the locomotive through the transmission device, and then drives the locomotive driving wheel through the running part Turn on track. However, the existing transmission device has problems such as low reliability, low efficiency, and high operating noise.

Contents of the invention

The object of the present invention is to provide a transmission box for a diesel locomotive to solve the problem of low reliability of the existing transmission device.

For achieving the above object, the technical scheme that the present invention takes is:

A transmission box for a diesel locomotive is provided, which includes a generator connection assembly, an input shaft assembly, and a starter motor connection assembly arranged in the transmission box body; the transmission box body includes an upper box body and a lower box body; the input assembly is connected with the The generator connection assembly and the starter motor connection assembly are engaged;

The generator connection assembly includes a first connecting shaft; the first connecting shaft is sleeved with a first gear close to its stepped surface and matched with the first connecting shaft through a taper; the first connecting shaft located at the right end of the first gear is sleeved A first distance ring and a sealing structure are provided, and a second distance ring, a first pressure plate and a first end cover connected to the transmission box body are provided on the first connecting shaft at the left end of the first gear;

The input shaft assembly includes an input shaft, the input shaft is provided with a second gear close to its stepped surface and meshed with the first gear; the second gear and the input shaft are connected through taper fit; the input gear located at the right end of the second gear A sealing structure, a third distance ring, a flange and a second pressure plate are sleeved on the shaft, and a fourth distance ring and a first gland are provided on the input shaft at the left end of the second gear;

The starter motor connection assembly includes a second connection shaft; the second connection shaft is sleeved with a third gear that is close to its step surface and meshed with the second gear; the third gear and the second connection shaft are fitted through a taper; The second connecting shaft at the right end of the third gear is provided with the fifth distance ring, the sealing structure and the connecting flange, and the second connecting shaft at the left end of the third gear is provided with the sixth distance ring, the third pressing plate and the connecting shaft successively. Second end cap.

Preferably, the first gear and the first connecting shaft, the second gear and the input shaft, and the third gear and the second connecting shaft are all connected with a taper fit of 1:50, and the interference of the taper fit is 0.13 mm -0.15mm, 0.17mm-0.19mm and 0.11mm-0.13mm, the contact between the outer cone surface of the first connecting shaft and the inner cone surface of the first gear, the second gear and the input shaft and the third gear and the second connecting shaft The areas are all greater than or equal to 85%.

Preferably, both the first spacer ring and the bearing and the second spacer ring and the bearing sleeve are respectively provided on both sides of the first gear through interference fit; the left side of the second distance ring is provided with a first As for the pressing plate, the left side of the first pressing plate is provided with a first end cover connected with the transmission box body through bolts.

Preferably, the third spacer ring and the flange are fitted on the input shaft through a taper of 1:50, and the contact area of the taper surface is greater than or equal to 85%; the second pressure plate is set on the right side of the input shaft through bolts; the fourth The settlement ring and the bearing are arranged on the left side of the second gear through interference fit; the fourth spacer ring is fixedly connected with the second gland through the cooperation between the bearing sleeve and the bearing.

Preferably, a square-shaped hole is provided in the second gland and is mated with the transmission shaft of the gear oil pump.

Preferably, the gear oil pump communicates with several oil pipes through an oil separator.

Preferably, the fifth distance ring and the coupling flange are fitted on the second connecting shaft through a taper of 1:50, and the contact area of the taper surface is greater than or equal to 85%; the sixth distance ring is arranged close to the third gear, and the second The left side of the six distance rings is provided with a third pressure plate; the left side of the third pressure plate is provided with a third end cover connected with the transmission box body through bolts.

Preferably, the sealing structure includes an oil throwing ring and a bearing sleeve; the oil throwing ring is sleeved on the first connecting shaft, the input shaft and the second connecting shaft, and forms a labyrinth oil seal with the bearing sleeve.

Preferably, the lower box is provided with an oil filtering structure, and the oil filtering structure includes a magnetic head seat, a support frame and a mounting flange fixed on the lower box body; one end of the magnetic head seat is provided with a magnet, and the other end of the magnetic head seat is threaded with the mounting flange Connection; clearance fit between the mounting flange and the support frame; a filter screen is set on the support frame.

Preferably, the upper box and the lower box are connected by conical pins and bolts; the upper box is provided with a ventilator and a pressure gauge; the lower end of the pressure gauge communicates with the oil separator, and the oil separator is equipped with a The adjusting bolt; the lower box is equipped with an oil standard assembly and a screw plug.

The transmission box for a diesel locomotive provided by the present invention has the following beneficial effects:

In the present invention, the power and rotational speed are input from the input shaft assembly, and the power and rotational speed are respectively transmitted to the generator connection assembly and the starter motor connection assembly, so as to realize the transmission of mechanical energy. And the first gear is connected with the first connecting shaft, the second gear and the input shaft, and the second connecting shaft of the third gear, so that the first gear is connected with the first connecting shaft, the second gear is connected with the input shaft and the third gear. The connection between the second connecting shafts of the gears is more compact and firm, which reduces the loss of mechanical energy and increases the reliability of power transmission during the power transmission process. In addition, distance rings, pressure plates and end covers are provided on both sides of the first connecting shaft, the input shaft and the second connecting shaft through bearings for positioning the first connecting shaft, the input shaft and the second connecting shaft. To move to prevent its axial movement, thereby increasing the reliability of transmission box power transmission.

The invention has compact structure and novel conception, effectively solves the problem of poor reliability of transmission boxes of traditional internal combustion locomotives, and has strong practicability and good popularization.

Description of drawings

Fig. 1 is a structural diagram of a transmission box for a diesel locomotive.

Fig. 2 is a structural diagram of a gearbox-generator connection assembly for a diesel locomotive.

Fig. 3 is a block diagram of a gearbox input shaft assembly for a diesel locomotive.

Fig. 4 is a structural diagram of a starter motor connection assembly for a transmission case of a diesel locomotive.

Fig. 5 is a lubricating structural diagram of a transmission case for a diesel locomotive.

Fig. 6 is a structural diagram of an oil filter for a transmission case of a diesel locomotive.

Fig. 7 is a sealing structure diagram of a transmission case for a diesel locomotive.

Among them, 1. Generator connection assembly; 2. Input shaft assembly; 3. Starter motor connection assembly; 4. Upper box; 5. Lower box; 6. Pressure gauge; 7. Oil separator; 8. Adjusting bolt; 9. Oil standard assembly; 10. First connecting shaft; 11. First gear; 12. First distance ring; 13. Oil throwing ring; 14. Bearing sleeve; 15. Seventh distance ring; 16. Second Distance ring; 17, first pressure plate; 18, first end cover; 19, input shaft; 20, second gear; 21, third distance ring; 22, flange; 23, second pressure plate; 24, the first Four distance rings; 25, gland; 26, the eighth distance ring; 27, gear oil pump; 28, the second connecting shaft; 29, the third gear; 30, the fifth distance ring; 31, coupling flange; 32. The sixth spacer ring; 33. The magnetic head seat; 34. The magnet; 35. The mounting flange; 36. The support frame; 37. The filter screen; 38. The third pressure plate; 39. The second end cover; 40. The oil pipe; 41, filter oil outlet; 42, spring.

Detailed ways

The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

According to one embodiment of the present application, as shown in Figures 1-7, the transmission box for a diesel locomotive of this solution includes a generator connection assembly 1, an input shaft assembly 2 and a starter motor connection assembly arranged in the transmission box body 3. The transmission box body includes an upper box body 4 and a lower box body 5, and the input components are engaged with the generator connection component 1 and the starter motor connection component 3 respectively.

A pressure gauge 6 is installed on the upper box body 4, and the pressure gauge 6 communicates with the oil separator 7, and the oil separator 7 is provided with an adjusting bolt 8 for adjusting the oil flow; through the adjusting bolt 8, the flow of the oil is controlled, That is, through the pressure gauge 6 and the oil separator 7, the oil pressure in the transmission box is controlled to ensure the working efficiency of the transmission box. The oil standard assembly 9 is arranged on the lower casing 5 by a screw plug and a washer.

Referring to Fig. 2, the generator connecting assembly 1 includes a first connecting shaft 10, the first gear 11 is sleeved on the stepped surface of the first connecting shaft 10 through an interference fit, and the interference is between 0.13mm-0.15mm, and The taper fit connection of 1:50 is adopted between the first connecting shaft 10 and the first gear 11, and the contact area between the outer tapered surface of the first connecting shaft 10 and the inner tapered surface of the first gear 11 is greater than or equal to 85%, and the first The hardness of the outer tapered surface of the connecting shaft 10 is 45-50HRC, DS≥1.5mm, and the dismounting oil pressure P≤209MPa, which makes the structure between the first connecting shaft 10 and the first gear 11 more compact and increases the reliability of its transmission. A connecting shaft 10 is made of carbon steel 45#, and the quenched and tempered hardness is 260-300HBs.

The first distance ring 12 cooperates with the bearing, and is sleeved on the right side of the first gear 11 through an interference connection, and then the oil throwing ring 13, the bearing sleeve 14, and the seventh distance ring 15 are sleeved on the first connecting shaft 10, the first connecting shaft 10 is positioned, thereby limiting the movement of the first connecting shaft 10 in the axial direction, avoiding excessive energy loss during power transmission, and increasing the reliability of power transmission. At the left end of the first gear 11, the second distance ring 16 is sleeved on the first connecting shaft 10 close to the first gear 11 by the bearing sleeve 14 and the bearing, and on the left side of the second distance ring 16, the bearing is installed. Insert the first pressure plate 17, and fix the first pressure plate 17 with bolts, install the first end cover 18 on the left side of the first pressure plate 17, and fix it with bolts and washers. The cover 18 is fixed on the transmission box body.

Referring to FIG. 3 , the input shaft assembly 2 includes an input shaft 19 , and the second gear 20 meshes with the first gear 11 to realize power transmission between the input shaft assembly 2 and the generator connection assembly 1 . The second tooth is fitted tightly on the stepped surface of the input shaft 19 through interference fit, and its interference is between 0.13mm-0.15mm. In addition, a 1 : 50 taper fit connection, and the contact area of the taper surface between the input shaft 19 and the first gear 11 is greater than or equal to 85%, and the hardness of the taper surface of the input shaft 19 is 45-50HRC, DS≥1.5mm. Make the structure between the input shaft 19 and the second gear 20 more compact, and increase the reliability of its transmission, wherein the material of the input shaft 19 is carbon steel 45#, and the quenched and tempered hardness is 260-300HBs.

The right side of second gear 20 installs NU314E cylindrical roller bearing, then packs into bearing sleeve 14, oil throwing ring 13 and felt ring, prevents lubricating oil from leaking. The third spacer ring 21 and the flange 22 are arranged on the input shaft 19 through a taper fit of 1:50, the interference is 0.13-0.15mm, and the contact area of the taper surface is not less than 85%, and then the second pressure plate is fixed by bolts 23 is located at the limit end of input shaft 19, compresses the left end structure of input shaft 19, makes its structure more compact. In addition, the matching connection between the third distance ring 21 , the flange 22 and the input shaft 19 prevents the axial movement of the input shaft 19 and reduces the power loss of the input shaft 19 . The fourth distance ring 24 and the NU314E bearing are installed on the left end of the second gear 20 through interference fit, and the bearing sleeve 14, QJ214Q2Q1 bearing, gland 25 and bolts are installed in sequence on the left end of the fourth distance ring 24 for Compress the inner ring of the bearing. The input shaft 19 assembly 2 is horizontally placed on the transmission box body through M10 screws and washers, and then a distance ring and a gear oil pump 27 are installed on one end of the input shaft 19, and the transmission shaft in the gear oil pump 27 is inserted into the rectangular hole opened on the gland 25 , when the input shaft 19 rotates, it drives the gland 25 to rotate, and the gland 25 drives the gear oil pump 27 to rotate.

Referring to FIG. 4, the starter motor connection assembly 3 includes a second connection shaft 28, and the third gear 29 is sleeved on the stepped surface of the second connection shaft 28 through an interference fit, and the interference is between 0.13mm-0.15mm, and Adopt 1:50 taper fit connection between the second connection shaft 28 and the third gear 29, the contact area between the second connection shaft 28 outer cone surface and the third gear 29 inner cone surface is greater than or equal to 85%, and the second The hardness of the outer tapered surface of the connecting shaft 28 is 45-50HRC, DS≥1.5mm, and the oil pressure P≤209MPa for disassembly makes the structure between the second connecting shaft 28 and the third gear 29 more compact and increases the reliability of its transmission. The material of the second connecting shaft 28 is carbon steel 45#, and the quenched and tempered hardness is 260-300HBs.

The right end of the third gear 29 on the second connecting shaft 28 is sleeved with the fifth distance ring 30, and the fifth distance ring 30 is fixed by the NU2214E cylindrical roller bearing, and then installed on the right end of the fifth distance ring 30 The bearing sleeve 14, the oil throwing ring 13 and the felt ring are installed with a connecting flange 31 at the right side of the second connecting shaft 28, and the connecting flange 31 is connected with the second connecting shaft 28 with a taper of 1:50. The interference is 0.11-0.13mm, and the contact area between the connecting flange 31 and the second connecting taper surface is not less than 85%, which is used for positioning and preventing axial movement of the bearing. Mount the pressure plate and bolt M8 on the inner side of the connecting flange 31 to fix and compress the right part of the second connecting shaft 28, and then put pins, rubber rings, washers and stop pads into the holes of the connecting flange 31 A piece and a nut M16 are used to further fix the connecting flange 31 on the second connecting shaft 28 .

The left end of the third gear 29 on the second connecting shaft 28 is sheathed and installed with the sixth distance ring 32, and the sixth distance ring 32 is fixed to the second connection through a conventional small interference fit through the NU2214E bearing. On the shaft 28, on the left side of the sixth spacer ring 32, continue to install bearing sleeve 14, bearing, the third pressing plate 38 and bolts, for compressing the sixth spacer ring 32, making the structure more compact. Install the second end cover 39 on the side end of the third pressure plate 38, and fix the second end cover 39 on the second connecting shaft 28 by bolts M12 and washers, and at the same time, fix the end cover to the transmission box through the cooperation of the bolts and washers On the body, and then the starter motor connection assembly 3 is placed horizontally on the transmission box body.

Referring to Fig. 1 and Fig. 5, the gear oil pump 27 communicates with a plurality of oil pipes 40 through the oil separator 7, the transmission shaft in the gear oil pump 27 is inserted into the rectangular hole groove opened on the gland 25, and the input shaft 19 drives the gland 25 while rotating Rotate, the gland 25 drives the gear oil pump 27 to rotate, and the gear oil pump 27 rotates to transmit the oil to each component through the oil pipe 40, lubricate each component, and ensure the efficient operation of the transmission box at all times.

Referring to FIG. 6 , an oil filter structure is installed on the lower case 5 , the oil filter structure includes a magnetic head seat 33 mounted on a mounting flange 35 through threaded connection, and a plurality of magnets 34 are installed on the magnetic head seat 33 . Mounting flange 35 and supporting frame 36 gap fits, and spring 42 is arranged between mounting flange 35 and supporting frame 36, is used for promoting supporting frame 36 to move, and forces supporting frame 36 to withstand in the hole of lower box body 5, and supporting frame 36 is sleeved with one deck filter screen 37.

The lubricating oil passes through the filter screen 37 to initially filter the impurities in the lubricating oil, and then the lubricating oil enters the inner cavity of the support frame 36, the magnet 34 on the magnetic head seat 33 absorbs the iron powder in the lubricating oil, and the filtered lubricating oil It is discharged from the filter oil outlet 41, and then the lubricating oil is filtered again to ensure the lubricating effect of the lubricating oil.

Referring to Fig. 7, a sealing structure is provided on the generator connection assembly 1, the input shaft assembly 2 and the starter motor connection assembly 3, and the sealing structure includes the first connection shaft 10, the input shaft 19 and the second connection shaft 28 respectively. Oil throwing ring 13 and is fixed on the transmission box body, and forms the bearing sleeve 14 of labyrinth seal with oil throwing ring 13.

When the oil throwing ring 13 rotates with the rotation of the first connecting shaft 10, the input shaft 19 and the second connecting shaft 28, the oil is thrown into the groove on the bearing sleeve 14 and removed. In addition, the oil throwing ring 13 and the bearing The gap between the teeth of the sleeves 14 is 0.2-0.5 mm. The labyrinth seal is composed of the teeth on the oil throwing ring 13 and the groove group on the bearing sleeve 14. The throttling effect is caused by the drastic change of the gap between the teeth and the section of the groove group. The oil leaked in the transmission box undergoes many times of oil throwing, throttling, throwing oil, throttling, throwing oil, and throttling. , Effectively avoid oil leakage, at the same time, the sealing structure has no contact friction during operation, the sealing performance is stable, and the service life is long.

The invention has compact structure and novel conception, effectively solves the problem of poor reliability of transmission boxes of traditional internal combustion locomotives, and has strong practicability and good popularization.

Although the specific embodiment of the invention has been described in detail in conjunction with the accompanying drawings, it should not be construed as limiting the scope of protection of this patent. Within the scope described in the claims, various modifications and deformations that can be made by those skilled in the art without creative efforts still belong to the protection scope of this patent.

Claims (10)

1. A transmission box for a diesel locomotive, characterized in that: it includes a generator connection assembly, an input shaft assembly and a starter motor connection assembly arranged in the transmission box body; the transmission box body includes an upper box body and a lower box body body; the input assembly is respectively engaged with the generator connection assembly and the starter motor connection assembly; The generator connecting assembly includes a first connecting shaft; the first connecting shaft is sleeved with a first gear which is close to its stepped surface and fits with the first connecting shaft through a taper; the first gear located at the right end of the first gear A first spacer ring and a sealing structure are sleeved on the connecting shaft, and a second spacer ring, a first pressure plate and a first end cover connected to the transmission box body are provided on the first connecting shaft at the left end of the first gear; The input shaft assembly includes an input shaft, on which a second gear is sheathed close to its stepped surface and engaged with the first gear; the second gear is connected to the input shaft through taper fit; The input shaft at the right end of the second gear is provided with a sealing structure, a third distance ring, a flange and a second pressure plate, and the input shaft at the left end of the second gear is provided with a fourth distance ring and a first gland; The starter motor connection assembly includes a second connection shaft; the second connection shaft is sleeved with a third gear that is close to its step surface and meshed with the second gear; the third gear is connected to the second connection shaft through taper fit; the second connecting shaft at the right end of the third gear is provided with a fifth distance ring, a sealing structure and a connecting flange, and the second connecting shaft at the left end of the third gear is provided with The sixth distance ring, the third pressure plate and the second end cap. 2. The transmission box for a diesel locomotive according to claim 1, characterized in that: the first gear and the first connecting shaft, the second gear and the input shaft, and the third gear and the second connecting shaft are all A 1:50 taper fit connection is adopted, and the interference of the taper fit is 0.13mm-0.15mm, 0.17mm-0.19mm and 0.11mm-0.13mm respectively, the outer tapered surface of the first connecting shaft and the first gear inner The contact areas between the bevel surface, the second gear and the input shaft, and the third gear and the second connecting shaft are all greater than or equal to 85%. 3. The transmission box for a diesel locomotive according to claim 1, characterized in that: between the first spacer ring and the bearing and between the second spacer ring and the bearing sleeve are respectively provided by interference fit. On both sides of the first gear; the left side of the second distance ring is provided with a first pressure plate, and the left side of the first pressure plate is provided with a first end cover connected to the transmission box body through bolts. 4. The transmission box for a diesel locomotive according to claim 1, characterized in that: the third distance ring and the flange are fitted on the input shaft through a taper of 1:50, and the contact area of the taper surface is larger than Equal to 85%; the second pressure plate is set on the right side of the input shaft through bolts; the fourth settlement ring and the bearing are set on the left side of the second gear through interference fit; the fourth spacer ring is set on the left side of the second gear through the bearing The fit between the sleeve and the bearing is fixedly connected with the second gland. 5 . The transmission case for a diesel locomotive according to claim 4 , characterized in that: the second gland is provided with a square hole that is mated with the transmission shaft of the gear oil pump. 6 . 6. The transmission case for a diesel locomotive according to claim 5, wherein the gear oil pump communicates with several oil pipes through an oil separator. 7. The transmission box for a diesel locomotive according to claim 1, characterized in that: the fifth spacer ring and the coupling flange are fitted on the second connecting shaft through a taper of 1:50, and the taper surface The contact area is greater than or equal to 85%; the sixth distance ring is arranged close to the third gear, and the left side of the sixth distance ring is provided with a third pressure plate; the left side of the third pressure plate is provided with a The third end cover connected to the transmission box body. 8. The transmission box for a diesel locomotive according to claim 1, characterized in that: the sealing structure includes an oil throwing ring and a bearing sleeve; the oil throwing ring is sleeved on the first connecting shaft, the input shaft and the second The two are connected on the shaft and form a labyrinth oil seal with the bearing sleeve. 9. The transmission box for a diesel locomotive according to claim 1, characterized in that: the lower box is provided with an oil filter structure, and the oil filter structure includes a magnetic head seat, a support frame and a frame fixed on the lower box. The mounting flange on the top; one end of the magnetic head seat is provided with a magnet, and the other end is threadedly connected with the mounting flange; the mounting flange is in clearance fit with the support frame; the support frame is covered with a filter screen. 10. The transmission box for a diesel locomotive according to claim 1, characterized in that: the upper box and the lower box are connected by conical pins and bolts; the upper box is provided with a breather and a pressure gauge; the lower end of the pressure gauge communicates with the oil separator, and the oil separator is provided with an adjusting bolt for adjusting the oil pressure; the lower box is provided with an oil standard assembly and a screw plug.