Rail transit gear box test input stage fixing tool

Abstract

The utility model belongs to gear box overhauling technical field discloses a kind of rail transit gear box test input stage fixed tool, and specific technical solutions are as follows: including lower working base and lower vertical bracing, one end of lower working base is connected with base through lower vertical bracing, and between the other end of lower working base and base is supported by stand, lower working base is equipped with lower elastic element, lower pressing plate, upper working base is fixed with adapter seat through upper vertical bracing, adapter seat is movably connected on lower working base, upper working base is equipped with lower pressing support, the cylinder barrel of hydraulic oil cylinder is fixed on lower pressing support, the cylinder rod end of hydraulic oil cylinder is equipped with upper elastic element, the bottom of upper elastic element is equipped with upper pressing plate, gear box test input stage is clamped between upper pressing plate and lower pressing plate, upper elastic element and lower elastic element can alleviate the influence of test bench itself vibration to gear box input stage, ensure that gear box completely simulates actual operation live, and the input stage test of gear box can be well completed.

Description

Technical Field

[0001] This utility model belongs to the field of gearbox maintenance technology, specifically relating to a fixed tooling for testing the input stage of a rail transit gearbox. Background Technology

[0002] The gearbox of a high-speed train is a core component of the train's bogie. Through gear meshing, it reduces motor speed and increases torque, thus enabling train movement. High-speed train gearboxes require advanced overhaul every 2.9 million kilometers. After overhaul, they must undergo rigorous routine testing before being certified as qualified products. Currently, the commonly used tooling in the workshop is a simple support structure with a workbench featuring an inverted T-shaped linear groove. The nut of the locking bolt is engaged within this groove, and the bolt's thread passes through the input stage threaded hole of the gearbox, locking it in place and fixing the input stage to the workbench for operational testing. However, in actual high-speed train operation, the gearbox input stage is connected to the bogie via an elastic element made of vulcanized rubber and steel. Therefore, the current tooling does not accurately reflect actual operating conditions and cannot fully simulate them, making it difficult to obtain test results that closely approximate real-world operating conditions. Utility Model Content

[0003] To address the technical problems of existing fixed fixtures not considering the function of elastic elements during operation, only fixing the lower end of the input stage, and not fully simulating the fixing relationship between the upper end of the input stage and the bogie during operation, this utility model provides a fixed fixture for the input stage of a rail transit gearbox test, which can more closely approximate the normal operating state of the gearbox.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a fixed fixture for the test input stage of a rail transit gearbox, comprising an upper support base, a lower support base, and a base.

[0005] The lower support includes a lower working base and a lower vertical support plate. The lower working base is arranged parallel to the base. One end of the lower working base is connected to the base through the lower vertical support plate. The lower working base, the lower vertical support plate and the base together form a C-shaped structure. The other end of the lower working base is supported to the base by a column. The whole structure is lightweight and easy to assemble and disassemble.

[0006] The lower working base is equipped with a lower elastic element, and the lower elastic element is equipped with a lower pressure plate, which is arranged horizontally.

[0007] The upper support base includes an upper working base and an upper vertical support plate. The upper working base is arranged parallel to the lower working base. The upper working base is fixed to the adapter base through the upper vertical support plate. The upper working base and the upper vertical support plate form an approximately L-shaped structure. The upper vertical support plate is fixed in the middle of the adapter base. The four corners of the adapter base are movably connected to the lower working base by multiple bolts. A lower pressure bracket is installed on the upper working base. The lower pressure bracket is arranged at the bottom of the upper working base. The cylinder of the hydraulic cylinder is fixed on the lower pressure bracket. The cylinder rod of the hydraulic cylinder extends downward. An upper elastic element is installed at the end of the cylinder rod of the hydraulic cylinder. An upper pressure plate is installed at the bottom of the upper elastic element. The upper pressure plate is arranged horizontally. As the cylinder rod of the hydraulic cylinder extends and retracts, it drives the upper pressure plate to move up and down.

[0008] The upper pressure plate and the lower pressure plate are arranged opposite each other, and the gearbox test input stage is clamped between the upper pressure plate and the lower pressure plate.

[0009] The lower support includes a positioning plate. The cylinder of the hydraulic cylinder is installed between the positioning plate and the upper working base. The length of the cylinder determines the distance between the positioning plate and the upper working base. To increase the connection stability between the positioning plate and the upper working base, the upper positioning plate is connected to the upper working base by four studs. The four studs are arranged at the four corners of the positioning plate. The nuts of the studs are stuck at the bottom of the positioning plate. The upper end of the studs passes through the upper working base and is locked by a nut. The cylinder rod of the hydraulic cylinder passes through the through hole on the positioning plate and extends downward.

[0010] Both the upper and lower elastic elements are stacked springs. The stacked spring has a flat structure, which ensures a certain rebound force without causing lateral swaying. The stacked spring consists of multiple steel plates connected by rubber layers. The topmost steel plate is connected to the end of the hydraulic cylinder rod. The steel plates and the rubber layer are disc-shaped structures with a thickness much smaller than their diameter.

[0011] The upper working base and the upper vertical support plate are connected by an inclined plate, which improves the connection rigidity between the upper working base and the upper vertical support plate and ensures the stability of the test.

[0012] The upper and lower elastic elements are arranged coaxially, which ensures the installation stability of the gearbox input stage and makes the test results closer to the actual working conditions.

[0013] Compared with the prior art, the specific advantages of this utility model are as follows: This utility model uses an upper pressure plate and a lower pressure plate to press down on the gearbox input stage, avoiding rigid connection during the gearbox input stage test. The upper and lower elastic elements can alleviate the influence of the test bench vibration on the gearbox input stage, ensuring that the gearbox completely simulates the actual operating conditions. There is no need to use the original threaded holes on the gearbox body for fixing, avoiding damage to the gearbox threaded holes during the test. Without affecting the overall structure of the gearbox, the gearbox input stage test can be completed well and test results closer to the actual operating conditions can be obtained. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present invention.

[0015] Figure 2 This is the front view of the present invention.

[0016] Figure 3 This is a side view of the present invention.

[0017] Figure 4 for Figure 2 A magnified view of a portion of point A in the middle.

[0018] Figure 5 for Figure 2 A magnified view of a section at point B.

[0019] In the diagram, 1 is the upper support base, 11 is the upper working base, 12 is the upper vertical support plate, 13 is the adapter base, 14 is the lower pressure bracket, 141 is the positioning plate, 142 is the stud, 15 is the hydraulic cylinder, 16 is the upper elastic element, 161 is the steel plate, 162 is the rubber layer, 17 is the upper pressure plate, 18 is the inclined plate, 2 is the lower support base, 21 is the lower working base, 22 is the lower vertical support plate, 23 is the column, 24 is the lower elastic element, 25 is the lower pressure plate, and 3 is the base. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] like Figure 1-5 As shown, a fixed fixture for testing the input stage of a rail transit gearbox includes an upper support 1, a lower support 2, and a base 3.

[0022] The lower support base 2 includes a lower working base 21 and a lower vertical support plate 22. The lower working base 21 is arranged parallel to the base 3. One end of the lower working base 21 is connected to the base 3 through the lower vertical support plate 22. The lower working base 21, the lower vertical support plate 22 and the base 3 together form a C-shaped structure. The other end of the lower working base 21 is supported to the base 3 through a column 23 to ensure the structural rigidity of the lower working base 21. The whole structure is lightweight and easy to disassemble and assemble.

[0023] The lower working base 21 is equipped with a lower elastic element 24, and the lower elastic element 24 is equipped with a lower pressure plate 25, which is arranged horizontally.

[0024] The upper support base 1 includes an upper working base 11 and an upper vertical support plate 12. The upper working base 11 is arranged parallel to the lower working base 21. The upper working base 11 is fixed to the adapter 13 through the upper vertical support plate 12. The upper working base 11 and the upper vertical support plate 12 form an approximately L-shaped structure. The upper vertical support plate 12 is fixed in the middle of the adapter 13. The four corners of the adapter 13 are movably connected to the lower working base 21 by multiple bolts. A lower pressure bracket 14 is mounted on the upper working base 11. The lower pressure bracket 14 is arranged at the bottom of the upper working base 11. The cylinder of the hydraulic cylinder 15 is fixed on the lower pressure bracket 14. The cylinder rod of the hydraulic cylinder 15 extends downward. An upper elastic element 16 is mounted at the end of the cylinder rod of the hydraulic cylinder 15. An upper pressure plate 17 is mounted at the bottom of the upper elastic element 16. The upper pressure plate 17 is arranged horizontally. As the cylinder rod of the hydraulic cylinder 15 extends and retracts, it drives the upper pressure plate 17 to move up and down.

[0025] The upper pressure plate 17 and the lower pressure plate 25 are arranged opposite to each other, and the gearbox test input stage is located between the upper pressure plate 17 and the lower pressure plate 25.

[0026] The lower support 14 includes a positioning plate 141. The cylinder of the hydraulic cylinder 15 is installed between the positioning plate 141 and the upper working base 11. The length of the cylinder of the hydraulic cylinder 15 determines the distance between the positioning plate 141 and the upper working base 11. In order to increase the connection stability between the positioning plate 141 and the upper working base 11, the upper positioning plate 141 is connected to the upper working base 11 by four studs 142. The four studs 142 are arranged at the four corners of the positioning plate 141. The nuts of the studs 142 are locked at the bottom of the positioning plate 141. The upper end of the studs 142 passes through the upper working base 11 and is locked by a nut. The cylinder rod of the hydraulic cylinder 15 passes through the through hole on the positioning plate 141 and extends downward.

[0027] Both the upper elastic element 16 and the lower elastic element 24 are stacked springs. The stacked spring has a flat structure, which can ensure a certain rebound force without lateral swaying. The stacked spring includes multiple steel plates 161, which are connected to each other by rubber layers 162. The topmost steel plate 161 is connected to the end of the cylinder rod of the hydraulic cylinder 15. The steel plates 161 have a disc-shaped structure, and the rubber layer 162 has a disc-shaped structure with a thickness much smaller than its diameter.

[0028] The upper working base 11 and the upper vertical support plate 12 are connected by an inclined plate 18, which improves the connection rigidity between the upper working base 11 and the upper vertical support plate 12 and ensures the stability of the test.

[0029] The upper elastic element 16 and the lower elastic element 24 are arranged coaxially, which can ensure the installation stability of the gearbox input stage and make the test results closer to the actual working conditions.

[0030] The specific working process of this utility model is as follows: Before testing, the base 3 is fixed on the test platform, the cylinder rod of the hydraulic cylinder 15 retracts until the distance between the upper pressure plate 17 and the lower pressure plate 25 is greater than the height of the gearbox input stage, and the hydraulic cylinder 15 is locked. The gearbox is hoisted by a crane and the gearbox input stage is placed on the lower pressure plate 25. The hydraulic cylinder 15 is started, the cylinder rod of the hydraulic cylinder 15 extends outward, and the upper elastic element 16 and the upper pressure plate 17 move downward synchronously until they press against the upper top surface of the gearbox input stage, and the hydraulic cylinder 15 is locked. Under the combined action of the upper pressure plate 17, the upper elastic element 16, the lower pressure plate 25 and the lower elastic element 24, the gearbox input stage is fixed, and the gearbox performs a complete simulated operation. After the test is completed, the cylinder rod of the hydraulic cylinder 15 retracts, the upper elastic element 16 and the upper pressure plate 17 move upward synchronously, the upper pressure plate 17 disengages from the gearbox input stage, and the gearbox is hoisted off the lower pressure plate 25 by a crane, facilitating the simulated operation test of the next gearbox.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model shall be included within the scope of the present utility model.

Claims

1. A fixing fixture for the test input stage of a rail transit gearbox, characterized in that, It includes an upper support base (1), a lower support base (2), and a base (3); The lower support base (2) includes a lower working base (21) and a lower vertical support plate (22). The lower working base (21) is arranged parallel to the base (3). One end of the lower working base (21) is connected to the base (3) through the lower vertical support plate (22). The other end of the lower working base (21) is supported to the base (3) by a column (23). A lower elastic element (24) is installed on the lower working base (21), and a lower pressure plate (25) is installed on the lower elastic element (24). The upper support base (1) includes an upper working base (11) and an upper vertical support plate (12). The upper working base (11) is arranged parallel to the lower working base (21). The upper working base (11) is fixed to the adapter (13) through the upper vertical support plate (12). The adapter (13) is movably connected to the lower working base (21) by multiple bolts. The upper working base (11) is equipped with a lower pressure bracket (14). The cylinder of the hydraulic cylinder (15) is fixed on the lower pressure bracket (14). The cylinder rod of the hydraulic cylinder (15) extends downward. The cylinder rod end of the hydraulic cylinder (15) is equipped with an upper elastic element (16). The bottom of the upper elastic element (16) is equipped with an upper pressure plate (17). The upper pressure plate (17) and the lower pressure plate (25) are arranged opposite to each other.

2. The fixing fixture for the test input stage of a rail transit gearbox according to claim 1, characterized in that, The lower support (14) includes a positioning plate (141), which is connected to the upper working base (11) by four studs (142). The cylinder of the hydraulic cylinder (15) is placed between the positioning plate (141) and the upper working base (11), and the cylinder rod of the hydraulic cylinder (15) extends downward after passing through the through hole on the positioning plate (141).

3. The fixed fixture for the test input stage of a rail transit gearbox according to claim 2, characterized in that, The upper elastic element (16) and the lower elastic element (24) are both stacked springs. The stacked springs include multiple steel plates (161), and adjacent steel plates (161) are connected by a rubber layer (162).

4. The fixed fixture for testing the input stage of a rail transit gearbox according to claim 3, characterized in that, The upper working base (11) and the upper vertical support plate (12) are connected by an inclined plate (18).

5. The fixed fixture for the test input stage of a rail transit gearbox according to claim 4, characterized in that, The upper elastic element (16) and the lower elastic element (24) are arranged on the same axis.

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