CN214221974U

CN214221974U - Transmission gearbox

Info

Publication number: CN214221974U
Application number: CN202022490015.4U
Authority: CN
Inventors: 肖开勇; 徐仕武; 程同春; 曾夕勇; 刘志华
Original assignee: CRRC Ziyang Transmission Co Ltd
Current assignee: CRRC Ziyang Transmission Co Ltd
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-09-17
Anticipated expiration: 2030-11-02

Abstract

The utility model discloses a transmission gear box, comprising a box body structure, a lubrication system, an input shaft and an output shaft arranged in the box body structure. The box body structure consists of a lower box body, a middle box body, an upper box body and a cover The lubricating system is arranged in the lower box, the output shaft is arranged at the connection between the lower box and the middle box, the input shaft is arranged at the connection between the middle box and the upper box, and the output shaft is respectively connected with the input shaft and the upper box. The lubrication system is connected; the input shaft is connected to the motor to drive the output shaft to rotate, and drives the lubrication system to lubricate the transmission gear box. The transmission gear box provided by the utility model adopts a special lubricating system for cooling, and adopts forced lubrication; the meshing and power transmission between the output shaft and the input shaft are further ensured through the parameter setting of the cylindrical gear pair, and the power transmission is completed; , The bearing capacity is strong, the volume is small, and the transmission is high, and the transmission efficiency and reliability of the gearbox are improved.

Description

Transmission gear box

Technical Field

The utility model relates to a gear drive technical field, in particular to a transmission gear box for hybrid locomotive.

Background

The transmission gear box belongs to an important part in mechanical equipment and bears the power transmission of the mechanical equipment. In the prior art, the pump wheel and the turbine in the hydraulic transmission device enable the gear box to have larger volume, and have the defects of lower transmission efficiency and poor reliability. In addition, two bearings are respectively arranged on two sides of a gear shaft of a common gear box, two ends of the gear shaft bear radial force and axial force simultaneously, the gear shaft bears bidirectional force, and the service life of the gear shaft is influenced after long-term use. For the transmission of the hybrid locomotive, due to the structural limitation of the input end and the output end, the service life of the bearing cannot be increased by increasing the center distance. Therefore, the prior art gear box has the disadvantages of large volume, heavy weight, and inefficient transmission of torque.

SUMMERY OF THE UTILITY MODEL

For solving the problem that exists among the prior art, the utility model aims at providing a transmission gear box for hybrid locomotive for solve among the prior art drive arrangement's gear box bulky, transmission efficiency is low, the poor technical problem of reliability.

In order to achieve the above object, the utility model adopts the following technical scheme:

a transmission gear box comprises a box body structure, a lubricating system, an input shaft and an output shaft, wherein the lubricating system, the input shaft and the output shaft are arranged in the box body structure; the input shaft is connected with the motor to drive the output shaft to rotate, power is transmitted through the output shaft, and the lubricating system is driven to lubricate the transmission gear box.

Furthermore, the input shaft and the output shaft are arranged in the box body structure in parallel through bearing assemblies, and are respectively provided with an input gear and an output gear, and gear transmission is realized through the meshing of the input gear and the output gear.

The bearing assembly comprises a first bearing assembly, a second bearing assembly, a third bearing assembly, a fourth bearing assembly and a fifth bearing assembly, wherein the first bearing assembly and the second bearing assembly are respectively arranged at two ends of the input shaft and support the input shaft; the fourth bearing assembly and the fifth bearing assembly are respectively arranged at two ends of the output shaft and used for supporting the output shaft; the third bearing assembly is arranged on two sides of the output gear of the output shaft and used for positioning the output gear.

Further, the first bearing assembly and the second bearing assembly respectively adopt a cylindrical roller bearing and/or a four-point ball bearing to fix the input shaft; and the third bearing assembly, the fourth bearing assembly and the fifth bearing assembly are respectively mounted on the output shaft by adopting cylindrical roller bearings and/or four-point ball bearings.

Furthermore, an oil pump gear wheel is arranged on the output shaft and is connected with the lubricating system through the oil pump gear wheel to drive the lubricating system.

Further, lubricating system includes that oil pump gear, pump seat, oil pan constitute and the filter, oil pump gear, filter and oil pan constitute and all set up on the pump seat, through the oil pump gear is connected with the oil pump gear wheel that the output shaft is constituteed, and through oil pan is constituteed and is fixed lubricating system.

Furthermore, an oil duct and an adjusting mechanism are further arranged in the transmission gear box, and the oil quantity in the oil duct is adjusted through the adjusting mechanism.

Furthermore, the output shaft is connected with a connecting sleeve through a spline and connected with the output gear through the connecting sleeve.

Furthermore, the input gear and the output gear are in interference fit, and the interference magnitude is 0.18-0.20 mm.

Furthermore, the box body structure is provided with a box cover, a mounting seat, an oil filling port, an oil discharging port and an oil pointer, and the box cover is arranged on the lower box body and used for observing and maintaining the interior of the gear box; the mounting seat is arranged on the middle box body and used for mounting the transmission gear box; the oil quantity in the gear box is adjusted and checked through the oil filling port, the oil discharging port and the oil pointer; and the cover plate is covered on the upper box body through a fiber mat.

The utility model has the advantages that:

the transmission gear box provided by the utility model has compact structure, and adopts reasonable structure to facilitate assembly and detection; and a special lubricating system is adopted for cooling, forced lubrication is adopted, the sealing structure reasonably prevents oil leakage, and the reliability is high. The meshing and power transmission of the output shaft and the input shaft are further ensured through the parameter setting of the cylindrical gear pair, and both ends of the cylindrical gear pair can be connected with corresponding motors or corresponding control parts to finish the power transmission; the gear box has the characteristics of strong bearing capacity, high efficiency, long service life, low noise, dust prevention and water prevention, and has the advantages of simple and convenient installation and stable and reliable work.

Drawings

Fig. 1 is an appearance structure schematic diagram of the gear box of the embodiment of the present invention.

Fig. 2 is a schematic longitudinal cross-sectional view of a gear box according to an embodiment of the present invention.

Fig. 3 is a schematic transverse cross-sectional view of a gear box according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of an input shaft assembly according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of an output shaft assembly according to an embodiment of the present invention.

Fig. 6 is an installation structure diagram of the lubricating system of the embodiment of the present invention.

Fig. 7 is a front view of the lubricating system according to the embodiment of the present invention.

Fig. 8 is a right side view of the lubricating system according to the embodiment of the present invention.

Fig. 9 is a front view of a gear box according to an embodiment of the present invention.

Reference numerals: 1-lower box body; 2-a middle box body; 3, putting the box body; 4-cover plate; 5-a fiber mat; 6-mounting a base; 7-a breather; 8-a first cover; 9-a second cover; 10-oil filler; 11-oil discharge port; 12-oil mark; 13-an input shaft; 14-an output shaft; 101-input gear; 102-oil slinger I; 103-end cover I, 104-bearing sleeve I; 105-spacer ring i; 106-distance ring I; 107-plug I; 201-cylindrical roller bearing II; 202-four-point ball bearing I; 203-spacer ring II; 204-spacer ring III; 205-distance ring II; 206-pin; 207-bearing housing II; 208-end cap II; 301-output gear; 302-connecting sleeve; 303-bearing pressing ring; 304-a bearing pad; 305-bearing housing iii; 306-cylindrical roller bearing iii; 307-four-point ball bearing IV; 401-oil pump gear wheel; 402-cylindrical roller bearing II; 403-bearing sleeve IV; 404-a gland; 405-flange i; 406-Flange cover plate I; 501-oil pump gear; 502-pump mount; 503-oil pan composition; 504-a filter; 505-oil ducts; 506-oil outlet channel; 507-steel balls; 508-a spring; 509-oil baffle.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are described clearly and completely below, and it is obvious that the described embodiments are some embodiments of the present invention, not all embodiments.

The following description of the present invention will be made with reference to the accompanying drawings 1 to 9.

In the embodiment, as shown in fig. 1 to 3, a transmission gear box for a hybrid locomotive comprises a lower box body 1, a middle box body 2, an upper box body 3 and a cover plate 4, wherein the lower box body is of a top opening structure, the middle box body and the upper box body are both of an upper opening structure and a lower opening structure, the upper opening and the lower opening of the middle box body are respectively connected with the upper box body and the lower box body, the top opening of the upper box body is covered by the cover plate, and the whole gear box is closed. Preferably, a fiber mat 5 is arranged below the cover plate, and the cover plate is tightly covered on the upper box body through the fiber mat, so that the sealing performance of the gear box is ensured.

The outer surface of the gear box of the embodiment is provided with a nameplate, a first box cover 8, a second box cover 9, a mounting seat 6, an oil filling port 10, an oil discharging port 11 and an oil pointer 12; the left side and the right side of the middle box body are symmetrically provided with mounting seats for mounting and fixing the gear box; the first box cover and the second box cover are fixedly arranged around the lower box body through bolts and gaskets, wherein the first box cover is arranged on the left side and the right side of the lower box body, and the second box cover is arranged on the front side and the rear side of the lower box body and is used for observing or maintaining the interior of the lower box body of the gear box; and the front side is also provided with a nameplate, an oil filling port, an oil discharging port and an oil pointer, the gear box is subjected to oil adding and reducing through the oil filling port, the oil discharging port and the oil pointer, and the oil quantity in the gear box is observed.

The gear box of this embodiment is provided with a lubricating system component, a breather 7, and an input shaft component and an output shaft component which are parallel to each other, wherein an input shaft 13 composed of the input shaft is arranged between the upper box body and the middle box body, and an output shaft 14 composed of the output shaft is arranged between the middle box body and the lower box body. The lubricating system consisting of the lubricating system is arranged in the lower box body and used for cooling and lubricating devices in the gear box and preventing the influence of overhigh temperature in the driving device on all parts; the breather 7 is arranged in the middle box body and used for balancing the internal and external pressure of the gear box driving device, ensuring the balance of the gear box and preventing lubricating oil from leaking. The transmission between the input shaft and the output shaft can be realized by a gear transmission mechanism, a worm and gear transmission mechanism, a belt pulley transmission mechanism or a planet gear transmission mechanism and the like.

In another embodiment, the input shaft 13 and the output shaft 14 of the present embodiment use a gear transmission. The gear structure of the input shaft and the gear structure of the output shaft are meshed to complete the drive conversion of the gear box.

As shown in fig. 4, the input shaft of the present embodiment includes: the input shaft is arranged in the gear box and can rotate relative to the gear box through the first bearing assembly and the second bearing assembly.

Wherein, first bearing subassembly sets up in the front end of input shaft, including cylindrical roller bearing I, oil slinger I102, end cover I103, bearing housing I104, spacer ring I105, plug I, distance ring I106, I107 of bolt and I isotructure of packing ring, I fixed cover of cylindrical roller bearing is located on the input shaft, the right side of cylindrical roller bearing I is provided with distance ring I for carry out the distance installation to the mounted position of cylindrical roller bearing I, do not contact with first bearing subassembly when making input gear rotate. And an oil slinger I is arranged on the left side of the cylindrical roller bearing I, and surplus engine oil in the input shaft is thrown out of the gear box through the oil slinger I. An end cover I is embedded on the outer side of the oil slinger I, a bearing sleeve I is arranged on the cylindrical roller bearing I, a spacer ring I is arranged between the end cover I and the bearing sleeve I, and the spacer ring I is fixed through a bolt I and a gasket I. Still be provided with the inlet port on the bearing housing I to carry out the involution through plug I to the plug mouth of bearing housing I, prevent that machine oil from throwing away from the plug mouth.

The second bearing assembly is arranged at the rear end of the input shaft and comprises a cylindrical roller bearing II 201, an oil slinger II, an end cover II 208, a bearing sleeve II 207, a spacer ring II 203, a plug II, a spacer ring II 205, a bolt II, a washer II, a four-point ball bearing I202, a pin 206, a spacer ring III 204 and the like. The second bearing assembly is different from the first bearing assembly in that a bearing of the second bearing assembly consists of a cylindrical roller bearing II and a four-point ball bearing I, a distance ring II is arranged between the cylindrical roller bearing II and the four-point ball bearing I, and a pin for fixing the four-point ball bearing I is further arranged between the cylindrical roller bearing II and the four-point ball bearing I.

As shown in fig. 5, the output shaft assembly of this embodiment includes an output shaft, a third bearing assembly, a fourth bearing assembly, a fifth bearing assembly, an output gear 301 and a connecting sleeve 302, the connecting sleeve is sleeved in the middle of the output shaft, and is fixedly connected with the output gear through a bolt, and is engaged with the input gear through the output gear; the connecting sleeve is sleeved with a third bearing assembly, the fourth bearing assembly and the fifth bearing assembly are respectively sleeved at the front end and the rear end of the output shaft, the output shaft is rotatably arranged in the gear box through the three bearing assemblies, the input shaft is connected with the motor for transmission so as to drive the output shaft to rotate, and the output shaft is connected with a corresponding device for driving.

Further, the third bearing assembly comprises a bearing pressing ring 303, a bearing pad 304, a bearing sleeve III 305, a cylindrical roller bearing III 306, a four-point ball bearing III, a four-point ball bearing IV 307 and the like, wherein the cylindrical roller bearing III and the four-point ball bearing III are arranged on the left side of the connecting sleeve, and the bearing pad is arranged between the cylindrical roller bearing III and the four-point ball bearing III; the four-point ball bearing IV is arranged on the right side of the connecting sleeve and fixes the cylindrical roller bearing III, the four-point ball bearing III and the four-point ball bearing IV through the bearing sleeve III and the bearing pressing ring.

The fourth bearing assembly comprises a gland 404, a bearing sleeve IV 403, an oil pump big gear 401, a cylindrical roller bearing II 402, a flange I405, a flange cover plate I406, a gasket, a bolt and the like. The front end of the output shaft is sleeved with a four-point ball bearing II, the right side of the four-point ball bearing II is provided with an oil pump large gear, and the oil pump large gear is abutted to the protruding part of the output shaft and is used for being meshed with a lubricating system; the gland is arranged on the front side of the four-point ball bearing II, the bearing sleeve IV is arranged outside the four-point ball bearing II, and the four-point ball bearing II is covered and fixed by the gland in the bearing sleeve IV. The right side of the gland is also embedded with a flange, the other end of the flange is provided with a groove, the flange pressing plate is arranged in the groove of the flange, and the flange pressing plate is fixed at the end part of the output shaft through a bolt and a gasket.

The fifth bearing assembly is different from the fourth bearing assembly only in that the fifth bearing assembly is not provided with an oil pump gearwheel, the bearing is a cylindrical roller bearing, and other structures are the same as the fourth bearing assembly.

Preferably, an oil baffle 509 is further arranged at the bottom of the gear box, and the output gear is sealed through the oil baffle 509, so that the engine oil in the lower box body cannot directly enter the output gear. Meanwhile, engine oil can enter the input shaft and the output shaft from the upper part of the gear box through corresponding channels to lubricate the machinery in the gear box.

As shown in fig. 6-8, the lubricating system assembly of this embodiment is disposed at the front end of the lower case of the gear case, and includes an oil pump gear 501, a pump seat 502, an oil pan assembly 503, a filter 504, a bolt, a washer, and the like, the oil pump gear is disposed above the pump seat, the filter is disposed at the lower side of the pump seat, an oil duct 505 is disposed in the gear case, the oil duct is connected to the filter, and the filter filters the engine oil entering the lubricating system assembly, so as to adsorb magnetic particles in the engine oil, and prevent dust and impurities from entering the transmission system. The oil pump gear meshes with the oil pump gear wheel that the output shaft constitutes, and when the work was constituteed to the output shaft, the oil pump gear that drives lubricating system and constitutes rotated to make machine oil pass through the filter and get into the oil duct, transport corresponding structurally with machine oil, thereby carry out the oil feeding lubrication to the gear box. The bottom of the pump seat is fixedly arranged on the oil pan assembly and is fixed through bolts and gaskets. Preferably, the pump seat is also provided with an adjusting mechanism for adjusting the oil quantity in the lubricating system; the pump base is provided with an oil outlet 506 connected with the oil passage, and the oil outlet is closed through an adjusting mechanism. The adjusting mechanism comprises a steel ball 507 and a spring 508, when the oil quantity in the oil duct is large, the steel ball is extruded, the spring on the left side of the steel ball is compressed, and the oil is discharged from the oil outlet channel and enters the bottom of the gear box, so that the oil quantity in the oil duct is adjusted.

In another embodiment, the output gear is connected with the connecting sleeve by a bolt, the connecting sleeve is in key connection with the output shaft, preferably in rectangular spline connection, and the circumferential fixation, transmission movement and torque of the output shaft and the connecting sleeve are realized by the key connection. The input gear and the output gear transmit torque through interference fit, the interference range is 0.18-0.20mm, preferably, the input gear and the output gear are in 1:50 taper interference fit, and the interference range is 0.16 mm. Through interference fit, the assembly and disassembly are convenient, the transmission of torque and axial force can be improved, and the positioning precision and the torque of the gear are ensured to be transmitted to the input gear from the input shaft.

The utility model discloses a corresponding motor or corresponding control unit can all be connected at the both ends of gear box, input shaft and output shaft, accomplishes the transmission of power. In addition, the front end and the rear end of the input shaft and the output shaft of the utility model are arranged in the gear box through corresponding bearing assemblies, and the input shaft and the output shaft are meshed with each other to be connected, so that the input shaft drives the output shaft to rotate; the input shaft and the output shaft are separately arranged through the transmission shaft, so that the phenomenon that the transmission shaft generates reverse torque and is damaged or generates overlarge plastic deformation to influence transmission due to reverse acting force of the motor and a control component is avoided.

The utility model discloses the rated input power P that well input shaft constitutes is 300KW, and rated input rotational speed n is 539rpm continuously, and the technical parameter of the cylindrical gear pair is: the center distance a is 583mm, the normal modulus is 8mm, the gear ratio of output and input can be 97/43, 103/37 or 86/54, and the like, and the gear ratio can adapt to application requirements of various speeds and loads according to different gear ratios; the helix angle is 9-14 degrees, preferably, the helix angle is 13 degrees; the width of the gear is 30mm, the precision grade is 6 grade, and the gear is made of 20 CrMnMoA. And carburizing and quenching the gear teeth, wherein the effective hardened layer depth is 1.2-1.6mm, the tooth surface hardness is 58-62HRC, the core hardness is 33-48HRC, the meshing backlash is 0.3-0.45 mm, and an input gear and an output gear on the input shaft are meshed to form a cylindrical gear pair.

In an actual scene, when the power transmission device is used, power and rotating speed are input through the input shaft, torque is transmitted to the connecting sleeve through the meshing of the gear on the input shaft and the output gear, the torque and the rotating speed are transmitted to the output shaft through the connecting sleeve and the rectangular spline pair of the output shaft, and the torque and the rotating speed are transmitted to the flanges at two ends of the output shaft from the middle part of the output shaft. And the large oil pump gear at the front end of the output shaft is meshed with an oil pump gear in the lower box body to drive the oil pump gear to rotate, so that engine oil enters an oil duct through a filter, and the engine oil is conveyed to a corresponding structure to feed and lubricate the gear box. The utility model discloses a lubricating oil carries out each bearing of forced lubrication and gear pair, and has carried out sealed processing with the position of external contact, prevents that the foreign object from getting into the seepage that prevents inside fluid simultaneously. The utility model discloses a gear box simple installation, bearing capacity are stronger, and the volume is less, have higher drive nature, can improve the transmission efficiency and the reliability of gear box.

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. A transmission gear box is characterized by comprising a box body structure, a lubricating system, an input shaft and an output shaft, wherein the lubricating system, the input shaft and the output shaft are arranged in the box body structure; the input shaft is connected with the motor to drive the output shaft to rotate, power is transmitted through the output shaft, and the lubricating system is driven to lubricate the transmission gear box.

2. The transmission gearbox as recited in claim 1, wherein said input shaft and said output shaft are disposed in parallel in said casing structure through bearing assemblies, and are respectively provided with an input gear and an output gear, and said input gear and said output gear are engaged to realize gear transmission.

3. The transmission gearbox as recited in claim 2, wherein said bearing assembly includes a first bearing assembly, a second bearing assembly, a third bearing assembly, a fourth bearing assembly and a fifth bearing assembly, said first bearing assembly and said second bearing assembly being respectively disposed at both ends of said input shaft for supporting said input shaft; the fourth bearing assembly and the fifth bearing assembly are respectively arranged at two ends of the output shaft and used for supporting the output shaft; the third bearing assembly is arranged on two sides of the output gear of the output shaft and used for positioning the output gear.

4. The transmission gearbox as recited in claim 3, wherein the first bearing assembly and the second bearing assembly each employ a cylindrical roller bearing and/or a four point ball bearing to secure the input shaft; and the third bearing assembly, the fourth bearing assembly and the fifth bearing assembly are respectively mounted on the output shaft by adopting cylindrical roller bearings and/or four-point ball bearings.

5. The transmission gearbox as recited in claim 1, wherein said output shaft is provided with an oil pump gear wheel, said oil pump gear wheel being connected to a lubrication system for driving said lubrication system.

6. The transmission gearbox as recited in claim 5, wherein said lubrication system comprises an oil pump gear, a pump base, an oil pan assembly and a filter, said oil pump gear, said filter and said oil pan assembly are all disposed on said pump base, connected to an oil pump gear wheel formed by said oil pump gear and said output shaft, and secured by said oil pan assembly.

7. The transmission gearbox as recited in claim 1, wherein an oil gallery and an adjustment mechanism are further provided in said transmission gearbox, and the amount of oil in said oil gallery is adjusted by said adjustment mechanism.

8. The transmission gearbox as recited in claim 2, wherein said output shaft is splined to a connection sleeve, through which said output gear is connected.

9. The transmission gearbox as recited in claim 2, wherein said input gear and said output gear are in an interference fit with an interference of 0.18-0.20 mm.

10. The transmission gearbox according to any one of claims 1 to 9, wherein the box body is structurally provided with a box cover, a mounting seat, an oil filling port, an oil discharging port and an oil pointer, and the box cover is arranged on the lower box body and used for observing and maintaining the interior of the gearbox; the mounting seat is arranged on the middle box body and used for mounting the transmission gear box; the oil quantity in the gear box is adjusted and checked through the oil filling port, the oil discharging port and the oil pointer; and the cover plate is covered on the upper box body through a fiber mat.