Rack bogie gear box assembly platform

Abstract

The utility model discloses a rack rail bogie gear box assembling platform belongs to rack rail bogie gear box assembling technical field, the utility model is provided with frame, and the top fixed link has platform table board eccentric clamping gear box lower box body's clamping area is formed, is equipped with the notch in the both sides of clamping area, and in the clamping area, the platform table board surface is equipped with first aperture, is used for satisfying the vertical brake lever of band type brake device from below the platform table board below from below to the upper wear -and -tear installation, the second aperture is arranged on the platform table board surface, is used for avoiding rack rail wheel, satisfies the manual operation detection demand after gear box assembly, the utility model discloses rack rail bogie gear box assembling platform realizes the merging of multiple processes, and the economic practicality, safe and reliable, effectively improves work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of gearbox assembly technology for rack and pinion bogies, and in particular to a gearbox assembly platform for rack and pinion bogies. Background Technology

[0002] A rack railway is a type of mountain railway with strong climbing ability. It consists of racks (tooth-shaped rails) laid in the middle of ordinary railway tracks. The bogies of rack railway vehicles are equipped with rack wheels. When the train is climbing, traction and braking force are transmitted through the meshing of the rack wheels and racks.

[0003] The gearbox of the rack-and-rail bogie incorporates a band brake system and features a multi-stage transmission design with a retaining shaft. The large gear, rack wheel, and large brake drum are connected in series and mounted on a hollow shaft via tapered bearings. The hollow shaft is then mounted on the axle via self-aligning bearings. The hollow shaft with the large gear and idler shaft are installed in the upper and lower housings, with a separately assembled side housing (containing the input shaft, drive shaft, and two small gear shafts). Two sets of band brakes are provided, each comprising a drive cylinder, lever, and clamping band. Band brake I is installed on the side of the large brake drum, which is connected to the large gear, while band brake II is installed on the side of the small brake drum, which is connected to the input shaft. The clamping band components of the band brakes are connected end-to-end by brake levers, which are connected by pins to apply or release braking force. Therefore, compared to ordinary urban rail passenger car bogie gearboxes, rack-and-rail bogie gearboxes have a more complex structure, larger dimensions, and greater weight, essentially occupying all the space between the two wheels of the drive wheelset.

[0004] Due to its unique structure, the gearbox differs from those of ordinary urban rail vehicle bogies. Besides accommodating the upper and lower housings, sufficient space is required on the sides and below for side housing assembly. Furthermore, during the assembly of the band brake system, adequate operating space is needed at the bottom to facilitate the insertion and installation of vertical levers, pins, and clamps. Additionally, wheel mounting requires placing wheels at both ends of the axle. Since this gearbox structure occupies all the space inside the wheel, the axle can only be supported by the gearbox. Therefore, the wheel mounting and wheelset runout checks in subsequent wheelset mounting processes must be carefully considered. Unlike the assembly process of existing ordinary urban rail vehicle bogie gearboxes, the operations required for gearbox assembly, side housing assembly, and the installation of two sets of band brakes, as well as wheel mounting, cover all spatial positions of the gearbox. Its assembly process differs from that of ordinary rail vehicle bogie gearboxes, involving numerous and complex steps. Utility Model Content

[0005] The purpose of this utility model is to overcome the defects of the existing technology and provide a gearbox assembly platform for a rack bogie, which solves the assembly process difficulties of a rack bogie gearbox with integrated belt braking device.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] The gearbox assembly platform for a rack bogie disclosed in this utility model includes:

[0008] The frame has a platform table fixed to its top, forming a clamping area for eccentrically clamping the lower gearbox housing. Notches are provided on both sides of the clamping area, and a first opening is provided on the surface of the platform table within the clamping area to allow the vertical brake lever of the belt brake device to be inserted from below the platform table for installation. A second opening is provided on the surface of the platform table to avoid the gear train and to meet the manual operation and testing requirements after the gearbox is assembled.

[0009] Furthermore, the platform table is fixedly connected to multiple lateral positioning seats at the edge of the clamping area. The multiple lateral positioning seats together form an L-shaped positioning surface to position the lower gearbox body laterally.

[0010] Furthermore, the platform table is fixedly connected to multiple lateral clamping mechanisms at the edge of the clamping area, which are used to clamp and fix the lower box body toward the lateral positioning seat.

[0011] Furthermore, the platform table is located in the clamping area and has multiple support blocks fixedly connected to the lower surface of the lower box to support the distance between the lower surface of the lower box and the upper surface of the platform table.

[0012] Furthermore, each corner of the quadrilateral platform table is fixed with a lifting ring for lifting the assembly platform.

[0013] Furthermore, the frame is a four-corner frame, and a connecting plate is fixedly connected to the lower corner of the frame for detachable and fixed connection to the ground or foundation platform.

[0014] The rack bogie gearbox assembly platform provided by this utility model, as described above, has the following advantages:

[0015] This utility model designs a gearbox assembly platform for rack bogies. It not only meets the traditional assembly requirements of upper and lower gearbox assembly, but also enables the assembly of side housings and the assembly of the band brake device. Furthermore, it satisfies the requirements for subsequent wheel pressing pretreatment and wheel mounting, wheelset runout detection after wheel pressing, and axle end assembly. It also meets the requirements for the sequential lifting and transport of the wheelset and gearbox as a whole. This design combines multiple processes and is economical, practical, safe, and reliable. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is an overall structural diagram of the gearbox assembly platform for a geared bogie disclosed in this utility model;

[0018] Figure 2 This is a diagram showing the steps for fixing the lower gearbox housing on the assembly platform of the gearbox for the rack bogie.

[0019] Figure 3 This is a diagram showing the assembly steps for assembling the axle belt height compensation device on the gearbox assembly platform of the geared bogie.

[0020] Figure 4 This is a step diagram of the assembly process for the idler shaft system on the gearbox assembly platform of the geared bogie;

[0021] Figure 5 This is a diagram showing the assembly steps of the gearbox assembly platform for the gear rack bogie, including the mounting box and support.

[0022] Figure 6 This is a step diagram of the assembly process for the side housing of the gearbox assembly platform for the geared bogie.

[0023] Figure 7 This is a step diagram of the assembly process for the protective cover on the gearbox assembly platform of the geared bogie;

[0024] Figure 8a This is a step diagram of the assembly of the belt brake device on the gearbox assembly platform of the geared bogie;

[0025] Figure 8b This is a step diagram of assembling the vertical lever I and the clamping belt I in the belt brake device I of the gearbox assembly platform of the gearbox of the rack bogie;

[0026] Figure 9a This is a step diagram of assembling the belt brake device II and the baffle on the gearbox assembly platform of the geared bogie;

[0027] Figure 9b This is another perspective of the assembly process of the belt brake device II and the baffle on the gearbox assembly platform of the geared bogie.

[0028] Figure 10 This is a step diagram of the assembly process for the wheel and axle end axle box assembly on the gearbox assembly platform of the geared bogie. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0030] See Figure 1 As shown;

[0031] A utility model gearbox assembly platform for a rack bogie includes: a frame and a platform table 1;

[0032] The frame adopts a four-legged frame structure, which supports the platform table 1. The platform table 1 meets the working height requirements of the assembly operators and ensures that the maximum load requirement is met. A connecting plate is fixed at the lower corner of the frame. The connecting plate can be detachably fixed to the ground or foundation platform by bolts to ensure the stability when clamping the gearbox.

[0033] The platform table 1 forms a clamping area for the eccentrically clamped lower gearbox housing 100. The lower gearbox housing 100 is clamped and positioned on the platform table 1, and other components are assembled based on this. The clamping position of the lower gearbox housing 100 is eccentrically arranged relative to the shape of the platform table 1, which meets the operating space requirements for the installation of the side housing assembly 105 and the brake lever. The eccentric structure fully considers the changes in the center of gravity position during the assembly process and after the entire assembly is completed, ensuring that the center of gravity remains stable.

[0034] Notches A1 and A2 are provided on both sides of the clamping area of ​​the platform table 1 to facilitate the hanging of wheels, and at the same time to allow the wheels to be lowered as a whole after pressing and the wheelset to be manually rotated for runout detection.

[0035] Within the clamping area, the platform table 1 has a first opening B1 on its surface, which allows the vertical brake lever of the belt brake device to be inserted and installed from below the platform table 1 from bottom to top.

[0036] The platform table 1 is located within the clamping area, and its surface is provided with a second opening B2 to avoid the gear wheel (connected to the large gear) and meet the manual operation and testing requirements after the gearbox is assembled.

[0037] The lateral positioning seats include three: lateral positioning seat 2, lateral positioning seat 3, and lateral positioning seat 4, which together form an L-shaped positioning surface to position the lower gearbox housing 100 laterally.

[0038] Platform table 1 is fixedly connected to multiple support blocks 5, 6, 7, 8 in the clamping area. These blocks are used to fit the lower surface of the lower housing 100 to form a positioning surface and support the gearbox lower housing 100. The contact area between the support blocks and the housing is made of nylon material. At the same time, it ensures that there is sufficient distance between the gearbox lower housing 100 and platform table 1 to meet the requirements of brake band installation and pin installation.

[0039] The platform table 1 is fixedly connected to two sets of lateral clamping mechanisms at the edge of the clamping area. The lateral clamping mechanisms 9 and 10 are used to clamp and fix the lower box body 100 towards the lateral positioning seats 2, 3, and 4. There are two lateral clamping mechanisms 10, which are symmetrically distributed at both ends of the notch A2. Both the lateral clamping mechanisms 9 and 10 are equipped with lead screws. The lead screws and the base are screwed together with the positioning surface of the lateral positioning seats to clamp and fix the lower box body 100.

[0040] Install lifting eye 11 in the M24 lifting eye screw mounting hole at one corner of the quadrilateral platform table to meet the transportation needs of the assembly platform and the overall lifting needs of the assembled workpiece together with the fixture.

[0041] A utility model assembly method for a gearbox of a rack bogie, based on the above-mentioned assembly platform, includes the following steps:

[0042] Step 1: Pre-assembly of height compensation device 101;

[0043] First, the large gear, gear wheel, large brake drum, and other components are connected and fixed together using bolts and cylindrical pins, forming a cylindrical shape; bearing outer rings are press-fitted at both ends; after the aforementioned components are assembled, they are fitted onto the hollow shaft, and inner rings of roller-bearing tapered bearings are press-fitted or heat-fitted from both ends to mate with the aforementioned bearing outer rings; bushings are installed at both ends of the hollow shaft.

[0044] Step 2: Assembly of the height compensation device 101 with the axle;

[0045] The components from step 1 are assembled onto the axle, and self-aligning bearings are installed in the bushings at both ends; the combination and assembly of the height compensation device and the axle are completed through steps 1 and 2.

[0046] Step 3: Assemble the axle belt height compensation device 101 with the lower gearbox housing 100 (e.g., Figure 2 , 3 (as shown)

[0047] The gearbox lower housing 100 is clamped and fixed on the assembly platform using a lateral positioning seat, a support block, and a lateral clamping mechanism; the axle component with the height compensation device with a large gear, which was assembled in step 2 above, is placed in the corresponding assembly position of the lower housing 100.

[0048] Step 4: Install the idler shaft system 102, then install the housing 103 and support 104 (e.g., Figure 4 , 5 (as shown)

[0049] Step 5: Install the side enclosure to form 105 (e.g.) Figure 6 (as shown)

[0050] During installation, carefully observe and manually rotate the small shaft to ensure the gears are properly engaged, then assemble the protective cover 106 (e.g.). Figure 7 (as shown)

[0051] Step 6: Assemble the band brake device, see [link / reference] Figure 8a , 8b As shown;

[0052] First, assemble the vertical lever I108 and the belt I109 (see...). Figure 8b (as shown)

[0053] Step 6.1: Insert one end of the cassette I109 into the bottom of the large brake drum through the gap between the assembly platform and the large brake drum;

[0054] Step 6.2: Use slings to insert the vertical lever I108 from bottom to top through the first opening B1 at the bottom of the assembly platform and lift it to the assembly position;

[0055] Step 6.3: The bottom of the vertical lever I108 has three pin holes. The middle pin hole is inserted into a pin shaft and fixed to the gearbox body. The other two pin holes are inserted into pin shafts and connected to the two ends of the cassette I109 respectively.

[0056] Step 6.4: Complete the assembly of the upper spring, connecting rod, and other components of the vertical lever I108. Finally, complete the assembly of the band brake device II110 and the baffle 111 (see...). Figure 9a , 9b (as shown)

[0057] Step 7: Pre-treatment of wheelsets before pressing;

[0058] The pre-processing steps for wheel pressing are completed on the assembly platform, and the wheels 112 at both ends are hung (see...). Figure 10 (as shown)

[0059] Step 8: Wheel bounce detection;

[0060] After the wheels are pressed into place, the entire workpiece is lowered back onto the assembly platform for wheelset runout inspection.

[0061] Step 9: Assembly of the shaft end axle box assembly 113 (see...) Figure 10 (As shown).

[0062] In the above technical solution, the gearbox assembly platform and assembly method for the rack bogie provided by this utility model not only meet the traditional assembly requirements of upper and lower gearboxes, but also realize the assembly of the side housing into 105 units and the assembly of the band brake device. Furthermore, it meets the requirements for subsequent pre-pressing treatment and wheel mounting, wheelset runout detection after wheel pressing, and axle end assembly. It also meets the requirements for the sequential lifting and transport of the wheelset together with the gearbox as a whole. It achieves multi-process merging and is economical, practical, safe, and reliable.

[0063] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A gearbox assembly platform for a rack bogie, characterized in that, include: The frame has a platform table (1) fixed to its top to form a clamping area for eccentrically clamping the lower gearbox housing (100). Notches (A1, A2) are provided on both sides of the clamping area. In the clamping area, a first opening (B1) is provided on the surface of the platform table (1) to allow the vertical brake lever of the belt brake device to be inserted from below the platform table (1) and installed from bottom to top. A second opening (B2) is provided on the surface of the platform table (1) to avoid the gear train and meet the manual operation and testing requirements after the gearbox is assembled.

2. The gearbox assembly platform for a rack bogie according to claim 1, characterized in that: The platform table (1) is fixedly connected to multiple lateral positioning seats (2, 3, 4) at the edge of the clamping area. The multiple lateral positioning seats (2, 3, 4) together form an L-shaped positioning surface to position the lower gearbox (100) laterally.

3. The gearbox assembly platform for a rack bogie according to claim 2, characterized in that: The platform table (1) is fixedly connected to multiple lateral clamping mechanisms (9, 10) at the edge of the clamping area, which are used to clamp the lower box body (100) of the fixed box toward the lateral positioning seat (2, 3, 4).

4. The gearbox assembly platform for a rack bogie according to claim 1, characterized in that: The platform table (1) is located in the clamping area and has multiple support blocks (5, 6, 7, 8) fixed to the lower surface of the lower box (100) to support the distance between the lower surface of the lower box (100) and the upper surface of the platform table (1).

5. The gearbox assembly platform for a rack bogie according to claim 1, characterized in that: Each corner of the quadrilateral platform table (1) is fixed with a lifting ring (11) for lifting the assembly platform.

6. The gearbox assembly platform for a rack bogie according to claim 1, characterized in that: The frame is a four-corner frame, and a connecting plate is fixedly connected to the lower corner of the frame for detachable and fixed connection to the ground or foundation platform.

Images