Water immersion test device and test method for aluminum alloy cab

Abstract

The invention relates to an aluminum alloy cab immersion test device, which comprises a water tank assembly, a cab fixing assembly and a connecting and fastening mechanism, the water tank assembly comprises a test water tank, the cab fixing assembly comprises a cab and a bracket for fixing the cab, and the cab fixing assembly is placed in the test water tank and is fixed to the test water tank through the connecting and fastening mechanism. According to the immersion test device and method provided by the invention, a counterweight does not need to be added in the cab during test, and the risk of cab damage caused by exceeding the cab bearing capacity is avoided; according to the device, the cab fixing assembly of a unique structure is designed, the structure can be suitable for fixing different cabs, universality is achieved, meanwhile, operation is convenient, the water immersion test efficiency is improved, and the test cost is reduced.

Description

Technical Field

[0001] The invention belongs to the field of waterproof sealing test of special automobile cabs, and particularly relates to a water immersion test device and a test method for an aluminum alloy cab. Background Art

[0002] After the cab of a special vehicle is manufactured, it is necessary to conduct a waterproof and sealing performance test. In the past, the carbon steel cab was heavy, and after being placed in a water tank, it could directly reach the immersion depth by its own weight for waterproof and sealing testing. In recent years, aluminum alloy materials have been widely used in the design of automobile cabs due to their high strength, light weight, and corrosion resistance. However, the aluminum alloy cab is light in weight. For example, the required immersion depth is 850mm. At this time, the upward buoyancy of the cab is nearly 30KN, while the gravity of the vehicle body is only 8.5KN. The buoyancy is much greater than the gravity of the cab. During the immersion test, the cab's own weight alone cannot reach the required immersion depth. During the test, adding counterweights to the cab to increase gravity has the risk of exceeding the cab's load-bearing capacity and causing damage to the cab, which is manifested in the following two aspects:

[0003] 1. The existing aluminum alloy cab immersion test is to increase all the weights in the car body to reach the immersion depth. This method may exceed the load-bearing capacity of the cab floor and damage the cab.

[0004] 2. The existing aluminum alloy cab immersion test is carried out by adding some counterweights inside the car body. When the water reaches a certain depth, a counterweight is added on the top of the cab to reach the immersion depth. The top counterweight is not easy to fix and there is a possibility of sliding and damaging the cab. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides an aluminum alloy cab immersion test device and test method, which avoids damage to the cab during the immersion test. In order to achieve this effect, the present invention provides the following technical solutions:

[0006] As a first aspect of the present invention, there is provided an aluminum alloy cab immersion test device, comprising a water tank assembly, a cab fixing assembly, and a connecting and fastening mechanism, wherein the water tank assembly comprises a test water tank, the cab fixing assembly comprises a cab and a bracket for fixing the cab, the cab fixing assembly is placed in the test water tank, and is fixed to the test water tank by the connecting and fastening mechanism.

[0007] In an embodiment of the present invention, the water tank assembly further comprises a storage water tank for supplying water to the test water tank.

[0008] Preferably, the water tank assembly is divided into two parts, a test water tank and a storage water tank, by a partition, and the storage water tank is used to store water; the water tank assembly is provided with a water circulation system to realize water recycling.

[0009] In the embodiment of the present invention, a test water tank water pipe and a storage water tank water pipe are respectively connected to the test water tank and the storage water tank on one side of the water tank assembly, a 2# valve is arranged between the test water tank water pipe and the storage water tank water pipe, and the storage water tank water pipe is also connected to the 1# valve through a three-way joint; the water circulation system is a pumping system arranged on the other side of the water tank assembly. The water inlet end of the pumping system is located at the bottom of the test water tank, the water outlet end is located at the top of the storage water tank, and a pumping pump is arranged on the pipeline between the water inlet end and the water outlet end.

[0010] Preferably, the test water tank is provided with four locking pin holes, which are manufactured through separate processing, with one end processed into a boss for convenient welding and limiting function, and the other end processed into a cylindrical surface; the inner hole of the locking pin hole is used for the eccentric pin shaft to pass through and out to press the cab fixing assembly against the test water tank.

[0011] Preferably, the eccentric pin is welded together by a handle and a limit pin to reduce the amount of processing. One end of the limit pin is processed into a boss, which plays a limiting role during assembly, and the cylindrical surface at the other end is processed into a plane to achieve eccentricity. Eccentricity can eliminate the gap between the eccentric pin and the cab fixing assembly to ensure the assembly quality.

[0012] In an embodiment of the present invention, the cab fixing assembly includes a front suspension fixing pin, a support ear, a locking piece, a hook, a spiral buckle, an ear plate, and a rear suspension seat plate arranged on a bracket; the front suspension fixing pin, the support ear, and the locking piece are arranged at the bottom of the bracket, and the bracket is connected to the front suspension of the cab through the front suspension fixing pin, the support ear, and the locking piece; and is connected to the rear suspension of the cab through the hook, the spiral buckle, the ear plate, and the rear suspension seat plate, thereby fixing the cab and the bracket as a whole to form a cab fixing assembly.

[0013] Preferably, the locking plate is fixed to the outer side of the support ear by bolts, and a cubic notch is provided on the side facing the support ear. The front suspension fixing pin includes a handle, a pin and a pin boss which are fixedly connected to each other, and a groove is provided on the pin boss for cooperating with the support ear and the locking plate to achieve locking; the pin boss includes a planar notch for installation and disassembly.

[0014] As a second aspect of the present invention, there is provided a water immersion test method, comprising the following steps:

[0015] S1: Lift the cab fixed assembly to the water tank assembly, put it into the test water tank, and press the cab fixed assembly to the water tank assembly through the eccentric pin shaft;

[0016] S2: Add water to the test water tank to reach the required water level, start the immersion test, record the static time, and observe the waterproof sealing condition of the cab;

[0017] S3: When the immersion time is reached, the water in the test water tank is pumped out and the eccentric pin is removed; the cab fixed assembly is lifted and moved out of the test water tank assembly for inspection to complete one test.

[0018] Preferably, the water in the test water tank is supplied by a storage water tank. Before the immersion test, the storage water tank is first filled with water; in S2, the valve between the storage water tank and the test water tank is opened to add water to the test water tank; in S3, after the immersion time is reached, the pumping system is turned on to pump water from the test water tank to the storage water tank.

[0019] Preferably, when the bracket and the cab front suspension are installed, the front suspension fixing pin shaft boss plane faces downward, and is inserted into the support ear and the cab front suspension in sequence. After installation, the front suspension fixing pin shaft is rotated 90° until the handle faces downward. When disassembling, the front suspension fixing pin shaft is rotated so that its boss plane faces downward, and the front suspension fixing pin shaft is removed.

[0020] The ear plate is welded to the rear suspension seat plate, one end of the spiral buckle is hinged to the ear plate, and the other end is provided with a hanging ring.

[0021] When installing the bracket and cab rear suspension, connect the rear suspension seat plate to the cab rear suspension through bolts, hang one end of the spiral buckle ring on the hook, and connect the other end to the ear plate through the pin and split pin. When disassembling, remove the bolts on the rear suspension seat plate.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The immersion test device and method provided in this application are specifically used for immersion test of a cab made of lightweight aluminum alloy. There is no need to add counterweights in the cab, thus avoiding the risk of damage to the cab due to exceeding the cab's load capacity;

[0024] 2. This device is designed with a unique cab fixing assembly, which can be used to fix different cabs, has universality and is easy to operate, thus improving the efficiency of the immersion test and reducing the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0026] Figure 1 It is a front view of the cab immersion test device provided by the present invention.

[0027] Figure 2 It is a left view of the cab immersion test device provided by the present invention.

[0028] Figure 3It is a front view of a water tank assembly in a cab immersion test device provided by the present invention.

[0029] Figure 4 The present invention is a top view of a water tank assembly in a cab immersion test device.

[0030] Figure 5 It is a front view of the eccentric pin shaft in the cab immersion test device provided by the present invention.

[0031] Figure 6 It is a front view of the cab fixing assembly in the cab immersion test device provided by the present invention.

[0032] Figure 7 It is a left view of the cab fixing assembly in the cab immersion test device provided by the present invention.

[0033] Figure 8 It is a schematic diagram of the state in which the eccentric pin of the present invention fastens the cab fixing assembly to the water tank assembly.

[0034] Fig. 9 It is a schematic diagram of the bottom fixed state of the cab fixing assembly of the present invention.

[0035] Fig.10 It is a front view of the front suspension fixing pin shaft of the present invention.

[0036] Fig.11 It is a schematic diagram of the side fixing state of the cab fixing assembly of the present invention.

[0037] In the figure, 1, water tank assembly; 2, eccentric pin shaft; 3, cab fixing assembly; 4, cab front suspension; 5, cab rear suspension;

[0038] 101 locking pin hole; 102, test water tank; 103, water pump system; 104, storage water tank; 105, 1# valve; 106, storage water tank water pipe; 107, 2# valve; 108, test water tank water pipe; 201, handle; 202, limit pin; 301, front suspension fixing pin shaft; 302, bracket; 303, support ear; 304, locking plate; 305, hook; 306, turnbuckle; 307, ear plate; 308, rear suspension seat plate. DETAILED DESCRIPTION

[0039] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0040] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0041] A water immersion test device and test method for an aluminum alloy cab. Figure 1 and Figure 2 As shown, it includes a water tank assembly 1, an eccentric pin shaft 2 arranged on the water tank assembly 1, and a cab fixing assembly 3 arranged inside the water tank assembly.

[0042] like Figure 3 and Figure 4 As shown, the water tank assembly 1 is divided into two parts: a test water tank 102 and a storage water tank 104. The test water tank 102 is provided with four locking pin holes 101 for fixing the cab fixing assembly 3, and the storage water tank 104 is used to store circulating water. A test water tank water pipe 108 and a storage water tank water pipe 106 are respectively connected to the test water tank 102 and the storage water tank 104 on one side of the water tank assembly 1. A 2# valve 107 is arranged between the test water tank water pipe 108 and the storage water tank water pipe 106. The storage water tank water pipe 106 is also connected to the 1# valve 105 through a three-way joint; a pumping system 103 is arranged on the other side of the water tank assembly 1. The water inlet end of the pumping system 103 is located at the bottom of the test water tank 102, and the water outlet end is located at the top of the storage water tank 104. A pumping pump is arranged on the pipeline between the water inlet end and the water outlet end. In this embodiment, the 1# valve 105 and the 2# valve 107 are flange-connected with an aluminum alloy ball valve DN65.

[0043] like Figure 5 and Figure 8 As shown, the eccentric pin shaft 2 is composed of a handle 201 and a limit pin 202. The cab fixing assembly 3 is fastened to the water tank assembly 1.

[0044] like Figure 6 and Figure 7 As shown, the cab fixing assembly 3 includes a bracket 302 and a front suspension fixing pin 301, a support ear 303, a locking piece 304, a hook 305, a turn buckle 306, an ear plate 307, and a rear suspension seat plate 308 arranged on the bracket 302. The front suspension fixing pin 301, the support ear 303, and the locking piece 304 are arranged at the bottom of the bracket 302, and the bracket 302 is connected to the cab front suspension 4 through the front suspension fixing pin 301, the support ear 303, and the locking piece 304; and is connected to the cab rear suspension 5 through the hook 305, the turn buckle 306, the ear plate 307, and the rear suspension seat plate 308, so that the cab and the bracket 302 are fixed as a whole to form the cab fixing assembly 3.

[0045] like Fig. 9 , Fig.10 As shown, the locking piece 304 is fixedly arranged on the outer side of the support ear 303 by bolts, and a cubic notch is arranged on the side facing the support ear 303. The front suspension fixing pin 301 includes a handle, a pin and a pin boss which are fixedly connected to each other, and a groove is arranged on the pin boss for cooperating with the support ear 303 and the locking piece 304 to achieve locking; the pin boss includes a planar notch for installation and disassembly.

[0046] When installing the bracket 302 and the cab front suspension, the front suspension fixing pin shaft 301 has its boss plane facing downwards, and is inserted into the support ear 303 and the cab front suspension in sequence. After installation, the front suspension fixing pin shaft is rotated 90° until the handle faces downwards. When removing, the front suspension fixing pin shaft 301 is rotated so that its boss plane faces downwards, and the front suspension fixing pin shaft 301 is removed.

[0047] like Figure 7 and Fig.11 As shown, the ear plate 307 is welded to the rear suspension seat plate 308, one end of the spiral buckle 306 is hinged to the ear plate 307, and the other end is provided with a hanging ring.

[0048] When the bracket 302 and the cab rear suspension are installed, the rear suspension seat plate 308 is connected to the cab rear suspension by bolts, one end of the spiral buckle 306 hanging ring is hung on the hook 305, and the other end is connected to the ear plate 307 through a pin shaft and a split pin. When disassembling, the bolts on the rear suspension seat plate 308 are removed.

[0049] During the test, first close the 2# valve 107, open the 1# valve 105, fill the storage water tank 104 with water, hoist the cab fixed assembly 3 to the test water tank 102, press the cab fixed assembly 3 into the test water tank 102 through the eccentric pin shaft 2 through the four lock pin holes 101, open the 2# valve 107, and water flows from the storage water tank 104 through the storage water tank pipe 106 and the test water tank pipe 108 to the test water tank 102 until the test water tank reaches the required water level, then close the 2# valve 107, record the static time, observe the waterproof sealing of the cab, and after the immersion time is reached, open the pump system 103 in the test water tank 102 to pump the water in the test water tank 102 to the storage water tank 104. Remove the four eccentric pin shafts 2, hoist the cab fixed assembly 3 out of the test water tank 102, and then check to complete a test. After all tests are completed, open valve 105 #1 to drain all the water in the storage water tank 104.

[0050] As an implementation method, the storage tank 104 is designed to determine the amount of water stored according to the depth of water in the cab, thereby determining the size of the storage tank 104. During the test, the amount of water flowing from the storage tank 104 into the test tank 102 is just enough to meet the test requirements. This is determined by the following calculation method:

[0051]

[0052] The steps include:

[0053] 1. Determination of test water tank size

[0054] According to the vehicle body dimensions, the test water tank is determined to be 3600mm long and 2800mm wide.

[0055] When the vehicle body is immersed in water to a depth of 850 mm, the volume of the test water tank below the water surface V1 is:

[0056] V1=3600×2800×850×10 -9 =8.57m 3

[0057] The outer volume of the car body below the water surface V2 = 2.88m 3

[0058] Volume of support below water surface V3:

[0059] Query the volume V3=0.04m through the three-dimensional model of the bracket 3

[0060] The test water tank is pre-filled with water before the test.

[0061] V4 = 3600 × 2800 × 300 × 10 -9 =3m 3

[0062] Water volume V of the test water tank during the test:

[0063] V=V1-V2-V3-V4=8.57-2.88-0.04-3=2.65m 3

[0064] 2. Determine the size of the storage tank

[0065] The volume of the part above 850mm from the box body is V'≥V=2.65m 3

[0066] The length of the storage water tank is selected to be equal to the width of the test water tank 2800mm, the width of the storage water tank is 1450mm, and the depth H1 of the part above 850mm from the tank body is:

[0067]

[0068] Therefore, the water tank depth H≥850+653=1503mm, take H=1505mm.

[0069] The above is the calculation method for the water tank depth. When applied, it can be calculated based on the actual width and length of the water tank.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An aluminum alloy cab immersion test device, characterized in that: It includes a water tank assembly, a cab fixing assembly, and a connecting and fastening mechanism. The water tank assembly includes a test water tank. The cab fixing assembly includes a cab and a bracket for fixing the cab. The cab fixing assembly is placed in the test water tank and fixed to the test water tank by the connecting and fastening mechanism.

2. The aluminum alloy cab immersion test device according to claim 1, characterized in that: The water tank assembly also includes a storage water tank for supplying water to the test water tank.

3. The aluminum alloy cab immersion test device according to claim 1, characterized in that: The water tank assembly is divided into a test water tank and a storage water tank by a partition. The storage water tank is used to store water. The water tank assembly is provided with a water circulation system to realize water circulation.

4. The aluminum alloy cab immersion test device according to claim 3, characterized in that: A test water tank water pipe and a storage water tank water pipe respectively connected to the test water tank and the storage water tank are arranged on one side of the water tank assembly, a 2# valve is arranged between the test water tank water pipe and the storage water tank water pipe, and the storage water tank water pipe is also connected to the 1# valve through a three-way joint; the water circulation system is a water pump system arranged on the other side of the water tank assembly; the water inlet end of the water pump system is located at the bottom of the test water tank, and the water outlet end is located at the top of the storage water tank, and a water pump is arranged on the pipeline between the water inlet end and the water outlet end.

5. The aluminum alloy cab immersion test device according to claim 3, characterized in that: The test water tank is provided with four locking pin holes, which are individually processed, with one end processed into a boss and the other end processed into a cylindrical surface; the inner hole of the locking pin hole is used for the eccentric pin shaft to pass through and press the cab fixing assembly against the test water tank.

6. The aluminum alloy cab immersion test device according to claim 5, characterized in that: The eccentric pin is welded together by a handle and a limit pin. One end of the limit pin is processed into a boss to limit the position during assembly, and the cylindrical surface of the other end is processed into a plane to achieve eccentricity.

7. The aluminum alloy cab immersion test device according to claim 1, characterized in that: The cab fixing assembly includes a front suspension fixing pin, a support ear, a locking piece, a hook, a spiral buckle, an ear plate, and a rear suspension seat plate arranged on the bracket; the front suspension fixing pin, the support ear, and the locking piece are arranged at the bottom of the bracket, and the bracket is connected to the front suspension of the cab through the front suspension fixing pin, the support ear, and the locking piece; and is connected to the rear suspension of the cab through the hook, the spiral buckle, the ear plate, and the rear suspension seat plate, so that the cab and the bracket are fixed as a whole to form a cab fixing assembly.

8. The aluminum alloy cab immersion test device according to claim 7, characterized in that: The locking plate is fixed to the outer side of the support ear by bolts, and a cube-shaped notch is arranged on the side facing the support ear. The front suspension fixed pin shaft includes a handle, a pin shaft and a pin shaft boss which are fixedly connected to each other. A groove is arranged on the pin shaft boss for cooperating with the support ear and the locking plate to achieve locking; the pin shaft boss includes a planar notch for installation and disassembly.

9. A water immersion test method, characterized in that: The aluminum alloy cab immersion test device provided according to any one of claims 5 to 8 comprises the following steps: S1: Lift the cab fixed assembly to the water tank assembly, put it into the test water tank, and press the cab fixed assembly to the water tank assembly through the eccentric pin shaft; S2: Add water to the test water tank to reach the required water level, start the immersion test, record the static time, and observe the waterproof sealing condition of the cab; S3: When the immersion time is reached, the water in the test water tank is pumped out and the eccentric pin is removed; the cab fixed assembly is lifted and moved out of the test water tank assembly for inspection to complete one test.

10. The water immersion test method according to claim 9, characterized in that: The water in the test water tank is supplied by the storage water tank. Before the immersion test, the storage water tank is filled with water first; in S2, the valve between the storage water tank and the test water tank is opened to add water to the test water tank; in S3, after the immersion time is reached, the pumping system is turned on to pump water from the test water tank to the storage water tank.

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