A movable drawbar test load loading device and test method

Abstract

The application discloses a movable draw pin test load loading device and a test method, which comprises a loading mechanism; the loading mechanism comprises a loading frame, a rotating wheel assembly is installed at the bottom of the loading frame, the rotating wheel assembly is driven by a driving device, the driving device can drive the rotating wheel assembly to move up and down relative to the bottom surface of the loading frame, a longitudinal loading mechanism, a transverse loading mechanism, a vertical loading mechanism and a supporting seat are installed in the loading frame; a first connecting head is detachably connected to the outside of the loading frame, the first connecting head and a second connecting head are detachably connected, the first connecting head and the second connecting head are connected with longitudinal beams of a walking platform, and the application solves the problems of complicated installation, large installation workload, high personnel demand, difficult weight loading and long test period in the draw pin test, and reduces the installation difficulty, installation workload and test cost of the test device, and obviously improves the test efficiency.

Description

Technical Field

[0001] This invention relates to a traction pin test load loading device, specifically a movable traction pin test load loading device and test method. Background Technology

[0002] In the static strength test of the rail vehicle body, the static strength of the connection structure between the traction pin and the body sleeper beam, as well as the local structure of the sleeper beam, needs to be assessed. A traction pin loading test device needs to be installed.

[0003] Currently, existing testing devices are relatively large in size and have non-disassembly structures. Installation requires removing part of the test platform, hoisting out the test vehicle body, hoisting in and installing the traction pin testing device, positioning and securing the device, and then placing the test vehicle body onto the device. The vehicle body's coupler is then connected to the test platform's top bar. Without removing the platform and hoisting the vehicle body, the testing device cannot be installed correctly. Pre-installing the testing device affects the platform's installation and testing progress, and also poses safety hazards. Furthermore, the existing method is labor-intensive and cumbersome; see patent CN201210258908.3 for details.

[0004] In addition, when the test vehicle is scheduled to undergo a traction pin test, the feasibility of this test must be considered. Therefore, in order to lift the vehicle out of the test bench, the test lines and test equipment used for the test must be fixed to the test vehicle. At the same time, the test lines and test equipment must be fixed neatly. This process significantly increases the workload and reduces the test efficiency. Summary of the Invention

[0005] In view of the current need for static strength testing of traction pins and vehicle body structures, the purpose of this invention is to provide a movable traction pin test load loading device to improve testing efficiency, reduce workload and testing costs.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] In a first aspect, embodiments of the present invention provide a movable traction pin test load loading device, including a loading mechanism; the loading structure includes a loading frame, and a rotating wheel assembly is installed at the bottom of the loading frame. The rotating wheel assembly is driven by a driving device, which can drive the rotating wheel assembly to move up and down relative to the bottom surface of the loading frame. A longitudinal loading mechanism, a transverse loading mechanism, a vertical loading mechanism, and a support base are installed inside the loading frame. A first connector is detachably connected to the outside of the loading frame, and the first connector and a second connector are detachably connected. The first connector and the second connector are connected to a walkway and a longitudinal beam.

[0008] As a further technical solution, the loading frame includes a first load-bearing member, a second load-bearing member, a load-bearing bottom surface, and a lateral stop. The first load-bearing member and the second load-bearing member are connected by a connecting rod to form a whole. The load-bearing bottom surface is located at the bottom of the first load-bearing member and the second load-bearing member, and the lateral stop is set on both sides of the first load-bearing member and the second load-bearing member.

[0009] As a further technical solution, a horizontal jack is also installed on the inner side of the horizontal stop.

[0010] As a further technical solution, the first connector is detachably connected to the lateral stop.

[0011] As a further technical solution, the support base includes two supports, the positions of which are adjustable on the loading frame.

[0012] As a further technical solution, a pad is also installed on the top of the support base.

[0013] As a further technical solution, the inner surfaces of the first connector and the second connector are provided with threads that mate with the longitudinal beam.

[0014] Secondly, based on the aforementioned movable traction pin test load loading device, this invention also discloses a method of using it, as follows:

[0015] Step 1: Lift the test vehicle body to a certain height at the lifting position, push the dummy trolley out of the support vehicle body area, and at the same time install and tighten the traction pin tooling at the bottom of the test vehicle body. Then push the loading mechanism to the support position of the test vehicle body, and place pads of different thicknesses on the upper surface of the support seat of the loading mechanism to keep the height of the vehicle body constant.

[0016] Step 2: Place the air spring part of the test vehicle body pillow beam on the upper surface of the support seat, adjust the vehicle body so that the test vehicle body is symmetrically set in the width direction; connect the coupler part at one end of the test vehicle body to the loading top bar of the test bench as a longitudinal force reaction support;

[0017] Step 3: The drive device disengages the wheel assembly from the rail surface, while the bearing surface at the bottom of the loading structure contacts the ground, thus fixing the loading mechanism on the ground.

[0018] Step 4: Install the first connector on the outside of the loading mechanism, so that the thread on the first connector mates with the thread on the longitudinal beam.

[0019] Step 5: Connect the first and second load-bearing components using a connecting rod;

[0020] Step 6: Install the second connector, mate the threads on the inner surface of the second connector with the threads on the longitudinal beam, and connect and fasten the first connector and the second connector with bolts and screws.

[0021] Step 7 involves longitudinal and vertical loading;

[0022] Step 8 involves horizontal loading.

[0023] As a further technical solution, after all tests are completed, the vehicle body test line and traction pin tooling are dismantled, and the test vehicle body is hoisted onto the transport vehicle; at the same time, the first connector, the second connector and the anchor bolts are removed, the drive device is operated, the wheel assembly contacts the ground rail, and the bearing surface at the bottom of the loading structure is lifted off the ground; the loading mechanism is moved to the fixed placement location.

[0024] As a further technical solution, before the rail vehicle body test begins, a dummy trolley supporting the vehicle body and the loading device are placed in the test area of ​​the test bench, and the traction pin load test is arranged after other test conditions are completed. The traction pin load test is then carried out after the other test conditions are completed.

[0025] As a further technical solution, before the rail vehicle body test begins, a dummy trolley supporting the vehicle body and the loading device are placed in the test area of ​​the test bench, and the traction pin load test is arranged after other test conditions are completed. The traction pin load test is then carried out after the other test conditions are completed.

[0026] The beneficial effects of the above embodiments of the present invention are as follows:

[0027] The traction pin test load loading device of this invention is movable. When it needs to be moved, the rotating wheel assembly is lowered, allowing the traction pin test load loading device to move along the ground rail. When the traction pin test load loading device reaches the test position, the rotating wheel assembly is raised, and the bearing surface at the bottom of the loading structure contacts the ground, fixing the loading mechanism on the ground. A first connector is detachably connected to the outside of the loading frame, and a second connector is detachably connected to the first connector and the second connector, which are connected to the longitudinal beam of the walkway. The detachable structure results in a smaller overall size for the traction pin test load loading device, and it does not interfere with the walkway. It can be pre-embedded before the test, making installation convenient. Furthermore, it eliminates the need to move the vehicle body, thus avoiding the need to place the test lines and equipment on the vehicle body, reducing the steps of organizing the test lines and installing the test equipment, significantly improving test efficiency and reducing workload. This solves the problems of cumbersome installation of the test device, large installation workload, high personnel requirements, difficulty in loading weights, and long test cycles in traction pin tests. Attached Figure Description

[0028] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0029] Figure 1 This is a front view of the movable traction pin test load loading device proposed in this invention in the loading state;

[0030] Figure 2 This is a top view of the movable traction pin test load loading device proposed in this invention in the loading state;

[0031] Figure 3 yes Figure 1 The D-direction view;

[0032] Figure 4 yes Figure 1 AA section view;

[0033] Figure 5 yes Figure 1 BB section view;

[0034] Figure 6 yes Figure 1 CC section view;

[0035] Figure 7 This is a schematic diagram of the first connector;

[0036] Figure 8 This is a schematic diagram of the second connector;

[0037] In the diagram: 1 Test vehicle body, 2 Loading device, 3 Roller assembly, 4 Anchor bolts, 5 First connector, 5-1 Arc-shaped part, 5-2 Connecting part, 5-3 Bolt hole, 5-4 Bolt hole; 6 Second connector, 6-1 Arc-shaped part, 6-2 Bolt hole, 6-3 Bolt hole; 7 Upper surface of support seat, 8 Transverse jack, 9 Transverse stop, 10 Walkway, 11 Traction pin fixture, 12 Bolt and nut, 13 Bolt, 14 Screw, 15 Connecting rod, 16-1 Connecting seat, 16-2 Connecting seat; 17 Locking screw, 18 Jack, 19 Loading surface, 20 Loading surface, 21 Loading surface, 22 Bearing component, 23 Bearing component, 24 Hanging seat, 25 Trench, 26 Transverse loading surface, 27 Bearing surface, 28 Roller assembly, 29 Screw and nut, 30 Mounting plate, 31 Longitudinal beam, 32 Support seat. Detailed Implementation

[0038] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0039] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0040] For ease of description, the words "up," "down," "left," and "right" appearing in this invention only indicate that they are consistent with the up, down, left, and right directions of the accompanying drawings themselves, and do not limit the structure. They are merely for the purpose of facilitating the description of this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] Terminology Explanation: The terms "installation," "connection," "linking," and "fixing" in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] As described in the background section, existing technologies have shortcomings. To address the problems of cumbersome installation, heavy workload, difficulty in loading and unloading counterweights, long testing cycles, low testing efficiency, and high testing costs associated with current traction pin testing devices, this invention proposes a movable traction pin testing load loading device. This testing device can be pre-embedded and placed in position. The device is equipped with wheels for position adjustment, saving time and effort. The structure of the testing device is detachable, making installation convenient. It does not require disassembling the platform, lifting it off the vehicle body, or placing test lines and testing equipment on the vehicle body.

[0043] This invention relates to a high-efficiency, mobile traction pin test load loading device and test method, which solves the problems of cumbersome installation of test devices, large installation workload, large personnel requirements, difficulty in loading weights, and long test cycle in traction pin tests. This invention reduces the installation difficulty, installation workload, and test cost of the test device, and significantly improves test efficiency.

[0044] In a typical embodiment of the present invention, such as Figure 1 , Figure 2 , Figure 3As shown, this embodiment discloses a movable traction pin test load loading device, which mainly consists of a loading mechanism 2, anchor bolts 4, a first connector 5, a second connector 6, a walkway 10, a traction pin fixture 11, bolts and nuts 12, bolts 13, screws 14, a trench 25, and a longitudinal beam 31.

[0045] In this embodiment, the loading mechanism 2 includes a rotating wheel assembly 3, a support base 32, an upper surface of the support base 7, a transverse jack 8, a transverse stop 9, a connecting rod 15, a connecting seat 16, a locking screw 17, a jack 18, a loading surface 19, a loading surface 20, a loading surface 21, a bearing component 22, a bearing component 23, a hanging seat 24, a transverse loading surface 26, a bearing surface 27, a rotating wheel assembly 28, screws and nuts 29, and a mounting plate 30.

[0046] The load-bearing component 22 is a crossbeam, and the load-bearing component 23 is a column. There are multiple load-bearing components 22 arranged in parallel. The load-bearing component 23 is installed on one side of one of the load-bearing components 22. The load-bearing components 22 and 23 have the same function, which is to bear the longitudinal load. Along the length of the load-bearing components 22, a transverse stop 9 is connected to each end of the multiple load-bearing components 22. The height of the transverse stop 9 is higher than that of the load-bearing components 22 and 23. A mounting plate 30 is fixed to the outside of each transverse stop 9 by bolts. The mounting plate 30 is used to connect the first connector 5. The first connector 5 and the second connector 6 are connected to the longitudinal beam 31 and the walkway 10 by bolts. The load-bearing components 22, 23, the bearing surface 27 and the transverse stops 9 form a loading frame.

[0047] Two support seats 32 are also installed inside the loading frame. The two support seats 31 are symmetrically arranged on the left and right sides relative to the center line of the load-bearing component. The position of the support seats 31 on the loading frame can be adjusted. After adjustment, the support seats 31 are fastened to the loading frame with screws and nuts 29. The air spring part of the test vehicle body pillow beam is placed on the upper surface 7 of the support seat.

[0048] One side of each support 31 is the loading surface 21 of the transverse loading device, used to fix the transverse loading device; the inner side of the bearing 22 is the loading surface 19 of the first longitudinal loading device, used to fix the first longitudinal loading device; the inner side of the bearing 23 is the loading surface 20 of the second longitudinal loading device, used to fix the second longitudinal loading device.

[0049] The bottom of the loading frame is equipped with a rotating wheel assembly 3 and a rotating wheel assembly 28. The rotating wheel assembly 3 and the rotating wheel assembly 28 can move along the ground rails on both sides of the trench 25, so that the entire loading mechanism 2 can move.

[0050] The shape of the first connector 5 is as follows: Figure 7As shown, it includes an arc-shaped part 5-1 that mates with the longitudinal beam 31 and a connecting part 5-2. The inner surface of the arc-shaped part 5-1 is provided with threads, and the top of the arc-shaped part 5-1 is provided with bolt holes 5-3. The connecting part 5-2 is used to connect with the transverse stop 9; the connecting part 5-2 is also provided with bolt holes 5-4.

[0051] The shape of the second connector 6 is as follows: Figure 8 As shown, it includes an arc-shaped portion 6-1 that mates with the longitudinal beam 31. The inner surface of the arc-shaped portion 6-1 is provided with threads. The top of the arc-shaped portion 6-1 is provided with a bolt hole 6-2, and the bottom is provided with a bolt hole 6-3. The bolt passes through the bolt hole 6-2 and the bolt hole 5-3 at the top to realize the connection between the upper parts of the first connector 5 and the second connector 6. The bolt passes through the bolt hole 6-3 and the bolt hole 5-4 to realize the connection between the lower parts of the first connector 5 and the second connector 6.

[0052] The loading frame also includes a longitudinal loading mechanism, a transverse loading mechanism, and a vertical loading mechanism. The specific structures of the longitudinal loading mechanism, transverse loading mechanism, and vertical loading mechanism can be found in patent CN201210258908.3. The longitudinal loading mechanism, transverse loading mechanism, and vertical loading mechanism are all connected to the control unit, which controls the longitudinal loading mechanism, transverse loading mechanism, and vertical loading mechanism.

[0053] In this invention, the installation of the traction pin loading device does not require the removal of the platform 10, and the test line and test equipment do not need to be placed on the vehicle body. There are no strict requirements for the layout of the test line and test equipment, and it does not affect the construction efficiency of the test line layout.

[0054] The specific experimental methods are as follows:

[0055] Before the rail vehicle body test begins, the dummy trolley supporting the vehicle body and the loading mechanism 2 are placed in the test area of ​​the test bench, and the traction pin load test condition is arranged after other test conditions. After the other conditions are completed, the traction pin load test is carried out. At this time, the test vehicle body is supported by the dummy trolley.

[0056] First, the test vehicle body is lifted to a certain height at the lifting position, and the dummy trolley is pushed out of the supporting vehicle body area. At the same time, the traction pin tool 11 is installed and tightened at the bottom of the test vehicle body. Then, the loading mechanism 2 is pushed to the supporting position of the test vehicle body, and pads of different thicknesses are placed on the upper surface 7 of the support seat of the loading mechanism 2 so that the height of the vehicle body remains unchanged.

[0057] Next, the air spring portion of the test vehicle body's bolster beam is placed on the upper surface 7 of the support seat, and the vehicle body is adjusted to be symmetrical in the width direction. The coupler portion at one end of the test vehicle body is connected to the loading top bar of the test bench as a longitudinal force reaction support.

[0058] Next step, such as Figure 5 As shown, the jack 18 is used to lift the lifting seat 24, compressing the return springs in the wheel assembly 3 and wheel assembly 28, causing the wheel assembly 3 and wheel assembly 28 to disengage from the rail surface, while the bearing surface 27 contacts the ground. The loading mechanism 2 is then fixed by the anchor bolts 4 through the ground groove.

[0059] Next step, such as Figure 2 As shown, the first connector 5 is installed by a hydraulic lifting vehicle. The thread on the first connector 5 is engaged with the thread on the longitudinal beam 31. The mounting surface of the connecting part of the first connector 5 is engaged with the mounting surface of the mounting plate 30. The first connector 5 and the mounting plate 30 are connected and fastened by bolts and nuts 12. Both connectors 5 are installed in this way.

[0060] Next step, such as Figure 6 As shown, Figure 1 The CC sectional view shows that the connecting seat 16-1 and the connecting seat 16-2 are connected by two horizontally arranged connecting rods 15, which connect the bearing 22 and the bearing 23 into a whole, and then the locking screw 17 is used for adjustment and locking; wherein the connecting seat 16-1 is set on the bearing 23, and the connecting seat 16-2 is set on the bearing 22;

[0061] Next, install the second connector 6, mate the threads on the inner surface of the second connector 6 with the threads on the longitudinal beam 31, and connect and fasten the first connector 5 and the second connector 6 with bolts 13 and screws 14. The other second connectors 6 are also installed using the same method.

[0062] The longitudinal load is transmitted to the longitudinal beam 31 by the loading mechanism 2, the first connector 5, and the second connector 6. At this time, the traction pin test loading device and the test bench form an integral loading device, and the test load is applied by the internal force of the integral loading device.

[0063] Next, according to the test requirements, this overall loading device can perform loading in two longitudinal directions, or simultaneously with vertical loads. Loading is achieved through a loading cylinder, electric pump, force sensor, loading surface 19 or 20, load-bearing component 22, and load-bearing component 23. Vertical loads are applied through a combination of the loading cylinder, electric pump, and suitable counterweights. Suitable counterweights are pre-placed in the trench 25.

[0064] Next, after the longitudinal load test is completed, the lateral load test will be conducted. The longitudinal test loading cylinder, electric pump, and force sensor will be moved between the lateral loading surface 26 and the traction pin fixture 11. The vehicle body reaction point will be achieved using a combination of lateral jacks 8 and lateral stops 9. The load will be applied through the loading cylinder to complete the lateral load test. Vertical test loads can also be applied simultaneously during the lateral load test.

[0065] Next, after all tests are completed, the vehicle body test line and traction pin fixture will be dismantled, and the test vehicle body will be hoisted onto the transport vehicle. Simultaneously, the first connector 5, the second connector 6, and the anchor bolts 4 will be removed. The jack 18 will be operated to release the force, and the return springs in the wheel assembly 3 and wheel assembly 28 will lift the loading mechanism 2, causing the bearing surface 27 to detach from the ground. The loading mechanism 2 can then be moved to its designated location, thus completing the entire test.

[0066] Finally, it should be noted that relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0067] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A movable traction pin test load loading device, characterized in that, Including the loading mechanism; The loading structure includes a loading frame, with a rotating wheel assembly installed at the bottom of the loading frame. The rotating wheel assembly is driven by a drive device, which can drive the rotating wheel assembly to move up and down relative to the bottom surface of the loading frame. A longitudinal loading mechanism, a transverse loading mechanism, a vertical loading mechanism, and a support base are installed inside the loading frame. A first connector is detachably connected to the outside of the loading frame. The first connector and a second connector are detachably connected and are connected to the longitudinal beam of the walkway. When the traction pin test load loading device moves to the test position, the wheel assembly is lifted, and at the same time the bearing surface at the bottom of the loading structure contacts the ground, fixing the loading mechanism on the ground. The loading mechanism is fixed by using anchor bolts through the ground groove. The first connector includes an arc-shaped part that mates with the longitudinal beam and a connecting part. The inner surface of the arc-shaped part is provided with threads, and the top of the arc-shaped part is provided with bolt holes. The connecting part is used to connect with the transverse stop; the connecting part is also provided with bolt holes. The second connector includes an arc-shaped portion that mates with the longitudinal beam. The inner surface of the arc-shaped portion is threaded. Bolt holes are provided at the top and bottom of the arc-shaped portion. Bolts pass through the bolt holes at the top and bottom to connect the upper parts of the first connector and the second connector. Bolts also pass through the bolt holes at the bottom to connect the lower parts of the first connector and the second connector.

2. The movable traction pin test load loading device as described in claim 1, characterized in that, The loading frame includes a first load-bearing member, a second load-bearing member, a load-bearing bottom surface, and a lateral stop. The first load-bearing member and the second load-bearing member are connected by a connecting rod to form a whole. The load-bearing bottom surface is located at the bottom of the first load-bearing member and the second load-bearing member, and the lateral stop is set on both sides of the first load-bearing member and the second load-bearing member.

3. The movable traction pin test load loading device as described in claim 2, characterized in that, A horizontal jack is also installed on the inside of the horizontal stop.

4. The movable traction pin test load loading device as described in any one of claims 2, characterized in that, The first connector is detachably connected to the lateral stop.

5. The movable traction pin test load loading device as described in any one of claims 1-4, characterized in that, The support base includes two supports, and the positions of the two supports on the loading frame are adjustable.

6. The movable traction pin test load loading device as described in claim 5, characterized in that, A pad is also installed on the top of the support base.

7. The loading method of the movable traction pin test load loading device as described in any one of claims 1-6, characterized in that, Step 1: Lift the test vehicle body to a certain height at the lifting position, push the dummy trolley out of the support vehicle body area, and at the same time install and tighten the traction pin tooling at the bottom of the test vehicle body. Then push the loading mechanism to the support position of the test vehicle body, and place pads of different thicknesses on the upper surface of the support seat of the loading mechanism to keep the height of the vehicle body constant. Step 2: Place the air spring part of the test vehicle body pillow beam on the upper surface of the support seat, adjust the vehicle body so that the test vehicle body is symmetrically set in the width direction; connect the coupler part at one end of the test vehicle body to the loading top bar of the test bench as a longitudinal force reaction support; Step 3: The drive device disengages the wheel assembly from the rail surface, while the bearing surface at the bottom of the loading structure contacts the ground, thus fixing the loading mechanism on the ground. Step 4: Install the first connector on the outside of the loading mechanism, so that the thread on the first connector mates with the thread on the longitudinal beam. Step 5: Connect the first and second load-bearing components of the loading mechanism via a connecting rod; Step 6: Install the second connector, mate the threads on the inner surface of the second connector with the threads on the longitudinal beam, and connect and fasten the first connector and the second connector with bolts and screws. Step 7 involves longitudinal and vertical loading; Step 8 involves horizontal loading.

8. The loading method as described in claim 7, characterized in that, After all tests are completed, the vehicle body test line and traction pin fixture are removed, and the test vehicle body is hoisted onto the transport vehicle; at the same time, the first connector, the second connector and the anchor bolts are removed, the drive device is operated, the wheel assembly contacts the ground rail, and the bearing surface at the bottom of the loading structure is lifted off the ground; the loading mechanism is moved to the designated placement location.

9. The loading method as described in claim 7, characterized in that, Before the rail vehicle body test begins, the dummy trolley supporting the car body and the loading device are placed in the test area of ​​the test bench, and the traction pin load test condition is arranged after other test conditions are completed. The traction pin load test is then carried out after the other test conditions are completed.

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