A two-stage transmission gearbox

Abstract

This invention discloses a two-stage transmission gearbox, comprising: an upper housing lifting screw seat, a traction motor connecting seat, an upper gearbox housing, a lower gearbox housing, connecting bolts, an oil drain plug, a nameplate, an oil filling plug, a lower housing lifting screw seat, and reinforcing plates. The connecting bolts are divided into two groups and welded to the outer walls of the upper and lower gearbox housings respectively. The upper and lower gearbox housings are connected by the connecting bolts. By sequentially removing the connecting bolts and screws, the equipment can be disassembled. The simple assembly and disassembly structure facilitates rapid repair of damaged internal components, shortens the contact distance between each gear, increases the gear rotation ratio, stabilizes the normal operation of the equipment, and employs a reasonable oil filling method to ensure rapid lubrication of the gears, preventing insufficient lubrication that could damage the gear teeth and effectively improving the service life of the equipment.

Description

Technical Field

[0001] This invention relates to a gearbox, specifically a two-stage transmission gearbox. Background Technology

[0002] With the development of railway transportation, passenger locomotives, freight locomotives, and shunting locomotives are being used more and more widely in various industries. At present, traction motors are generally used to drive gearboxes to provide power for locomotives.

[0003] The main performance indicators of existing gearbox products include structural strength, service life, stable operation, and ease of installation and maintenance. However, the two-stage transmission gearboxes that are currently widely used have relatively complex internal structures, poor operating efficiency leading to short service life, and inconvenient disassembly and maintenance after damage to gearbox components.

[0004] Therefore, we propose a two-stage transmission gearbox to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a two-stage transmission gearbox to solve the problems mentioned in the background art, such as the inconvenience of disassembly and maintenance after component damage due to the complex internal structure of the gearbox, and the short service life due to poor operating efficiency. This invention provides a new gearbox design that fully considers the above-mentioned performance indicators, combines the design input parameters, gear transmission ratio, rated torque, common operating speed, selects a reasonable gear lubrication method, and incorporates a labyrinth seal structure in the design.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a two-stage transmission gearbox, comprising: an upper housing lifting screw seat, a traction motor connecting seat, an upper gearbox housing, a lower gearbox housing, connecting bolts, an oil drain plug, a nameplate, an oil filling plug, a lower housing lifting screw seat, and stiffening plates. The connecting bolts are divided into two groups and are respectively welded to the outer walls of the upper gearbox housing and the lower gearbox housing. The upper gearbox housing and the lower gearbox housing are connected by connecting bolts, and a sealing strip is provided between the bottom of the upper gearbox housing and the top of the lower gearbox housing.

[0007] Preferably, there are two upper housing lifting screw seats, and the two upper housing lifting screw seats are respectively fixedly installed on the left and right sides of the outer wall of the upper housing of the gearbox.

[0008] Preferably, one side of the outer wall of the traction motor connecting seat is welded to the outer wall of the gearbox upper housing, and a connecting seat with the same shape as the upper housing lifting screw seat is welded to one side of the outer wall of the gearbox upper housing. Multiple threaded sleeves are fixedly inserted between the connecting seat and the opposite side of the upper housing lifting screw seat.

[0009] Preferably, the drain plug is fixedly installed on one side of the outer wall of the lower gearbox housing, and the oil inlet end of the drain plug penetrates through the outer wall of the lower gearbox housing and extends into the interior of the lower gearbox housing. The nameplate is set on one side of the outer wall of the lower gearbox housing.

[0010] Preferably, the oil filling plug is fixedly installed on the outer wall of the lower gearbox housing, and the oil outlet end of the oil filling plug penetrates through the outer wall of the lower gearbox housing and extends into the interior of the lower gearbox housing.

[0011] Preferably, the lower housing lifting screw seat is fixedly installed on the outer wall of the lower housing of the gearbox, and the number of the stiffening plates is two sets, with the two sets of stiffening plates respectively distributed on the outer surfaces of the upper housing and the lower housing of the gearbox.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] This invention involves assembling the equipment and then connecting the hooks on the hoisting equipment to the lifting screw seats on the upper housing for transport. Before use, the protective cover of the oil filling plug is opened, lubricating oil is injected into the equipment, and a rotation test is performed before installation on the target object. When maintenance is required, the protective cover of the drain plug is opened to quickly drain the lubricating oil. The connecting bolts and screws are then removed sequentially using the above method, allowing the equipment to be disassembled. The simple assembly structure and convenient disassembly method facilitate rapid repair of damaged internal components. It also shortens the contact distance between each gear, increases the gear rotation ratio, stabilizes the normal operation of the equipment, and uses a reasonable oil filling method to ensure rapid gear maintenance, preventing insufficient lubrication that could damage gear teeth and effectively extending the equipment's service life. Attached Figure Description

[0014] Figure 1 This is a perspective view of the main structure of a two-stage transmission gearbox according to the present invention;

[0015] Figure 2 This is a perspective view of the rear structure of a two-stage transmission gearbox according to the present invention.

[0016] In the diagram: 1. Upper housing lifting screw seat; 2. Traction motor connecting seat; 3. Upper gearbox housing; 4. Lower gearbox housing; 5. Connecting bolt; 6. Oil drain plug; 7. Nameplate; 8. Oil filling plug; 9. Lower housing lifting screw seat; 10. Rib plate. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1-2 As shown, the present invention provides a technical solution: a two-stage transmission gearbox, comprising: an upper housing lifting screw seat 1, a traction motor connecting seat 2, an upper gearbox housing 3, a lower gearbox housing 4, connecting bolts 5, an oil drain plug 6, a nameplate 7, an oil filling plug 8, a lower housing lifting screw seat 9, and a reinforcing plate 10. The connecting bolts 5 are divided into two groups and are respectively welded to the outer walls of the upper gearbox housing 3 and the lower gearbox housing 4. The upper gearbox housing 3 and the lower gearbox housing 4 are connected by the connecting bolts 5. A sealing strip is provided between the bottom of the upper gearbox housing 3 and the top of the lower gearbox housing 4.

[0019] according to Figure 1-2 As shown, there are two upper housing lifting screw seats 1. The two upper housing lifting screw seats 1 are fixedly installed on the left and right sides of the outer wall of the gearbox upper housing 3 respectively. Setting up the upper housing lifting screw seats 1 makes it convenient for the gearbox upper housing 3 to be quickly connected to the lifting equipment after production, thus reducing the lifting time.

[0020] according to Figure 1-2 As shown, one side of the outer wall of the traction motor connecting seat 2 is welded to the outer wall of the gearbox upper housing 3. One side of the outer wall of the gearbox upper housing 3 is welded with a connecting seat that is the same shape as the upper housing lifting screw seat 1. Multiple threaded sleeves are fixedly inserted between the connecting seat and the opposite side of the upper housing lifting screw seat 1. The connecting hole on the motor and the threaded sleeve on the traction motor connecting seat 2 are aligned, and a fixing screw is driven between them to quickly fix the motor.

[0021] according to Figure 1-2 As shown, the drain plug 6 is fixedly installed on one side of the outer wall of the lower gearbox 4, and the oil inlet end of the drain plug 6 penetrates through the outer wall of the lower gearbox 4 and extends into the interior of the lower gearbox 4. The nameplate 7 is set on one side of the outer wall of the lower gearbox 4. When the gearbox is under maintenance, the cover in the drain plug 6 can be opened to quickly drain the lubricating oil from the lower gearbox 4, reducing the time required for manual handling.

[0022] according to Figure 1-2As shown, the oil filling plug 8 is fixedly installed on the outer wall of the gearbox lower housing 4, and the oil outlet end of the oil filling plug 8 penetrates through the outer wall of the gearbox lower housing 4 and extends into the interior of the gearbox lower housing 4. The oil filling plug 8 can quickly inject lubricating oil into the gearbox lower housing 4, avoiding the need to disassemble the housing to complete the task.

[0023] according to Figure 1-2 As shown, the lower housing lifting screw seat 9 is fixedly installed on the outer wall of the lower housing 4 of the gearbox. There are two sets of stiffening plates 10, and the two sets of stiffening plates 10 are respectively distributed on the outer surface of the upper housing 3 and the lower housing 4 of the gearbox, which increases the structural strength of the upper housing 3 and the lower housing 4 of the gearbox, extends the service life of the upper housing 3 and the lower housing 4 of the gearbox, and prevents breakage.

[0024] The working principle of this embodiment is as follows: Move the lower gearbox 4 to the designated installation area and place the required gears in sequence according to the available space. After placement, place a sealing strip on top of the lower gearbox 4, and then cover the upper gearbox 3 with the mounting bolts 5 to form a single unit. Simultaneously, align the motor mounting holes with the threaded sleeve on the traction motor connector 2 and install fixing screws between them. After the equipment is assembled, connect the hooks on the hoisting equipment to the lifting screw seats 1 on the upper gearbox for transport. Before using the equipment, open the protective cover in the oil filler plug 8 and inject lubricating oil. After rotation testing, the equipment is installed in the user's location. When maintenance is required, the cover in the drain plug 6 is opened to quickly drain the lubricating oil. The connecting bolts 5 and screws are then removed in sequence using the above method to disassemble the equipment. The simple loading structure and convenient disassembly and assembly method facilitate quick repair of damaged internal components. At the same time, it shortens the contact distance between each gear, increases the gear rotation ratio, stabilizes the normal operation of the equipment, and uses a reasonable oil injection method to ensure that the gears are quickly lubricated, preventing insufficient lubrication that could damage the gear teeth and effectively improving the service life of the equipment.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A two-stage transmission gearbox for locomotives, characterized in that: include: The upper housing lifting screw seat (1), traction motor connecting seat (2), upper gearbox housing (3), lower gearbox housing (4), connecting bolts (5), drain plug (6), nameplate (7), oil filling plug (8), lower housing lifting screw seat (9), and stiffening plate (10) are provided. The connecting bolts (5) are divided into two groups and are welded to the outer walls of the upper gearbox housing (3) and the lower gearbox housing (4) respectively. The upper gearbox housing (3) and the lower gearbox housing (4) are connected by connecting bolts (5). A sealing strip is provided between the bottom of the upper gearbox housing (3) and the top of the lower gearbox housing (4). The upper gearbox housing (3) has a circular structure. After the upper gearbox housing (3) and the lower gearbox housing (4) are connected, two circular structures are formed. Each circular structure contains a gear. The three gears mesh in pairs to form a two-stage reduction gear set. A traction motor connecting seat (2) is provided on the left side of the top of the housing (3). The traction motor connecting seat (2) is a semi-circular arc structure. The traction motor connecting seat (2) is used to fix the traction motor to the upper housing (3) of the gearbox by bolts. A space is formed between the traction motor connecting seat (2) and the upper housing (3) of the gearbox. The traction motor connecting seat (2) is reinforced with the three circular structures by the rib plate (10). One side of the outer wall of the traction motor connecting seat (2) is welded to the outer wall of the upper housing (3) of the gearbox. A connecting seat with the same shape as the traction motor connecting seat (2) is welded to one side of the outer wall of the upper housing (3). The traction motor connecting seat (2) and the connecting seat are located on opposite sides of the upper housing (3) of the gearbox. Multiple threaded sleeves are fixedly inserted between the connecting seat and the opposite side of the traction motor connecting seat (2).

2. A two-stage transmission gearbox for a locomotive according to claim 1, characterized in that: The number of upper housing lifting screw seats (1) is two, and the two upper housing lifting screw seats (1) are respectively fixedly installed on the left and right sides of the outer wall of the upper housing (3) of the gearbox.

3. A two-stage transmission gearbox for a locomotive according to claim 1, characterized in that: The drain plug (6) is fixedly installed on one side of the outer wall of the lower gearbox housing (4), and the oil inlet end of the drain plug (6) penetrates the outer wall of the lower gearbox housing (4) and extends into the interior of the lower gearbox housing (4). The nameplate (7) is set on one side of the outer wall of the lower gearbox housing (4).

4. A two-stage transmission gearbox for locomotives according to claim 1, characterized in that: The oil filling plug (8) is fixedly installed on the outer wall of the gearbox lower housing (4), and the oil outlet end of the oil filling plug (8) penetrates the outer wall of the gearbox lower housing (4) and extends into the interior of the gearbox lower housing (4).

5. A two-stage transmission gearbox for a locomotive according to claim 1, characterized in that: The lower housing lifting screw seat (9) is fixedly installed on the outer wall of the lower housing (4) of the gearbox. There are two sets of stiffening plates (10), and the two sets of stiffening plates (10) are respectively distributed on the outer surfaces of the upper housing (3) and the lower housing (4) of the gearbox.

Images