A test bench for oil cylinder

Abstract

The application discloses an oil cylinder test bench and relates to the technical field of oil cylinder testing. The oil cylinder test bench comprises a main beam, a first mounting seat, a second mounting seat and a third mounting seat. A test cylinder is arranged between the first mounting seat and the second mounting seat. A piston rod of the test cylinder is rotationally connected with the first mounting seat, and a cylinder body of the test cylinder is rotationally connected with the second mounting seat. A loading cylinder is arranged between the second mounting seat and the third mounting seat. A piston rod of the loading cylinder is rotationally connected with the third mounting seat, and a cylinder body of the loading cylinder is rotationally connected with the second mounting seat. The axes of the test cylinder and the loading cylinder are arranged in parallel with the main beam. The first mounting seat with the multi-degree-of-freedom adjusting function is arranged, so that the height difference between the two ends of the test cylinder and the size of the lateral load borne by the test cylinder can be adjusted at will. The main beam with the stroke adjusting hole, the second support and the screw rod constitute a stroke adjusting mechanism, and the stroke adjusting mechanism can realize the arbitrary adjustment of the working stroke.

Description

Technical Field

[0001] This invention relates to the field of hydraulic cylinder testing technology, and in particular to a hydraulic cylinder testing bench. Background Technology

[0002] In hydraulic cylinder testing, a test bench is required to place the test cylinder. In addition to placing the test cylinder, the test bench also needs to apply a load to the test cylinder. Currently, the loading method is usually adopted, that is, a loading cylinder is symmetrically arranged opposite the test cylinder. When the piston rod of the test cylinder extends, the loading cylinder applies a resistance to the test cylinder.

[0003] During the test, high-pressure fluid is first supplied to the rodless chamber of the test cylinder (the rod chamber is connected to the fluid tank). The piston rod of the test cylinder extends, pushing against the piston rod of the loading cylinder. At this time, high-pressure fluid is supplied to the rodless chamber of the loading cylinder (the rod chamber is connected to the fluid tank), adding a load force to the extension of the piston rod of the test cylinder. After the piston rod of the test cylinder is fully extended, high-pressure fluid is supplied to the rod chamber of the test cylinder (the rodless chamber is connected to the fluid tank). At this time, high-pressure fluid is supplied to the rod chamber of the loading cylinder (the rodless chamber is connected to the fluid tank), adding a load force to the retraction of the piston rod of the test cylinder. The above steps are repeated, and the test cylinder repeats the extension and retraction actions.

[0004] In actual use, hydraulic cylinders need to be installed on equipment at both ends, which typically have a certain height difference. The testing equipment needs to be able to simulate this installation height difference to make the test approximate real working conditions. This height difference varies in different working scenarios, and the hydraulic cylinder test bench needs to be able to adjust this height difference.

[0005] Furthermore, due to machining and assembly errors, the position of the cylinder mounting base may deviate from the designed position, causing the direction of the cylinder's output force to be off-axis, resulting in an off-center load. The test bench also needs to simulate this off-center load condition.

[0006] The test bench needs to test various models of hydraulic cylinders, each with different lengths and strokes. The test bench must be able to adjust the test stroke to accommodate cylinders of various sizes. Existing test benches have the following drawbacks:

[0007] (1) The height difference between the two ends of the test cylinder is adjusted by replacing the test bench components. The adjustment process requires disassembling and assembling the test cylinder and test bench components. The adjustment process is cumbersome and cannot adjust any arbitrary height difference value. When there is a new height difference requirement, new test bench components need to be processed, which is time-consuming and labor-intensive.

[0008] (2) By installing pads, the lateral load can be applied, but the lateral load cannot be applied quantitatively. The test is random, the test effect is poor, and it is not easy to summarize the law of the lateral load performance of the hydraulic cylinder.

[0009] (3) The working stroke of the test bench cannot be continuously adjusted, which means that the piston rod of the oil cylinder cannot be fully extended during the test. The test bench can only meet the test of the full stroke of several fixed stroke oil cylinders. Summary of the Invention

[0010] The present invention aims to at least solve the technical problems in the prior art, such as the cumbersome adjustment of the height difference between the two ends of the test cylinder, the inability to quantitatively apply lateral load, and the inability to continuously adjust the working stroke of the test bench.

[0011] Therefore, one object of the present invention is to provide a hydraulic cylinder test bench, including a main beam, a first mounting seat, a second mounting seat and a third mounting seat; the first mounting seat and the third mounting seat are respectively installed on the left and right sides of the main beam, the second mounting seat is disposed between the first mounting seat and the third mounting seat, and the second mounting seat is slidably connected to the main beam;

[0012] The test cylinder is positioned between the first mounting base and the second mounting base. The piston rod of the test cylinder is rotatably connected to the first mounting base, and the cylinder body of the test cylinder is rotatably connected to the second mounting base. The loading cylinder is positioned between the second mounting base and the third mounting base. The piston rod of the loading cylinder is rotatably connected to the third mounting base, and the cylinder body of the loading cylinder is rotatably connected to the second mounting base. During testing, the extension and retraction of the test cylinder can be driven by the movement of the second mounting base, thereby providing a load force to the test cylinder.

[0013] In some embodiments, the first mounting base includes a first slider, a first bracket, and a first hydraulic cylinder. The first bracket is provided with a guide rail, which is vertically arranged and perpendicular to the main beam. The first slider is slidably connected to the guide rail and is connected to the piston rod of the test cylinder. The first slider is also connected to the first hydraulic cylinder, and the vertical extension and retraction of the first hydraulic cylinder can drive the first slider to move up and down along the guide rail.

[0014] In some embodiments, the first mounting base further includes a second slider and a second hydraulic cylinder. The second slider is slidably mounted on the first slider and is rotatably connected to the piston rod of the test cylinder. The second slider is also connected to the piston rod of the second hydraulic cylinder. The lateral extension and retraction of the second hydraulic cylinder can drive the second slider to slide horizontally along the first slider.

[0015] In some embodiments, the first slider includes a first slide rod and a second slide rod arranged parallel to each other vertically. Both ends of the first slide rod and both ends of the second slide rod are provided with a first connecting portion that is slidably connected to the guide rail. The first connecting portion is provided with a second connecting portion, and the second connecting portion is connected to the piston rod of the first oil cylinder.

[0016] In some embodiments, the first slider further includes a first side plate and a second side plate that are spaced apart from each other, the first slide rod and the second slide rod are mounted between the first side plate and the second side plate, and the first connecting portion is located outside the first side plate and the second side plate.

[0017] In some embodiments, the second slider includes a third side plate and a fourth side plate, which are connected as a whole by a third connecting part. The third side plate is provided with a fourth connecting part, which is rotatably connected to the piston rod of the test cylinder.

[0018] In some embodiments, the main beam is provided with a plurality of stroke adjustment holes along its axial direction, and the third mounting base is connected to the main beam through the stroke adjustment holes.

[0019] In some embodiments, the third mounting base includes a second bracket and a lead screw, the lead screw being threadedly connected to the second bracket, the second bracket being connected to the main beam through the stroke adjustment hole; the lead screw is connected to the piston rod of the loading cylinder.

[0020] In some embodiments, a fifth connecting part is connected to one end of the lead screw near the loading cylinder, and the fifth connecting part is rotatably connected to the piston rod of the loading cylinder.

[0021] In some embodiments, the second mounting base is provided with a bearing wheel, and the second mounting base is slidably connected to the side of the main beam through the bearing wheel.

[0022] The hydraulic cylinder test bench disclosed herein has the following advantages:

[0023] (1) The sliding pair consisting of the first slider and the first bracket is controlled by the first hydraulic cylinder to move up and down, thereby driving one end of the test cylinder to move up and down and adjusting the height difference between the two ends of the test cylinder. This adjustment method can adjust the height difference between the two ends of the test cylinder arbitrarily. The adjustment process does not require disassembling the test cylinder, which is more convenient and efficient. It also does not require the replacement of additional parts, thus reducing costs.

[0024] (2) The sliding pair consisting of the second slider and the first slider is controlled by the second oil cylinder to move left and right, which drives one end of the test cylinder to move left and right. The magnitude of the lateral load is adjusted by adjusting the hydraulic pressure in the second oil cylinder. This adjustment process can quantitatively change the magnitude of the lateral load, making the control more precise and the adjustment process convenient and efficient.

[0025] (3) The working stroke is adjusted by the stroke adjustment hole of the main beam and the pin hole on the second bracket, as well as the threaded connection between the second bracket and the lead screw, so as to realize the continuous and precise adjustment of the working stroke. Moreover, the boltless connection is adopted, and the adjustment process is more time-saving and labor-saving. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of a hydraulic cylinder test bench according to an embodiment of the present invention;

[0028] Figure 2 This is a front view of a hydraulic cylinder test bench according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the test state of a hydraulic cylinder test bench according to an embodiment of the present invention; Figure 3 (a) is a schematic diagram of the test cylinder in the fully retracted state of a hydraulic cylinder test bench in an embodiment of the present invention; Figure 3 (b) is a schematic diagram of the test cylinder in the fully extended state of a hydraulic cylinder test bench in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the first mounting base structure of a hydraulic cylinder test bench in an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the first mounting base structure of a hydraulic cylinder test bench in an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the first and second sliders of a hydraulic cylinder test bench in an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the installation structure of the first and second sliders of a hydraulic cylinder test bench according to an embodiment of the present invention;

[0034] Figure 8 This is a schematic diagram of the first cylinder fully retracted in an embodiment of the present invention.

[0035] Figure 9 This is a schematic diagram of the first cylinder fully extended in an embodiment of the present invention.

[0036] Figure 10 This is a schematic diagram of the piston rod end of the test cylinder in the raised state of a hydraulic cylinder test bench according to an embodiment of the present invention;

[0037] Figure 11This is a schematic diagram of the second slider and the second cylinder structure of a hydraulic cylinder test bench according to an embodiment of the present invention;

[0038] Figure 12 This is a schematic diagram of the third mounting base structure of a hydraulic cylinder test bench in an embodiment of the present invention;

[0039] Figure 13 This is a schematic diagram of the lead screw position adjustment of a hydraulic cylinder test bench according to an embodiment of the present invention.

[0040] Figure label:

[0041] 100. First mounting base; 101. Second slider; 1011. Third side plate; 1012. Third connecting part; 1013. Fourth connecting part; 1014. First mounting hole; 1015. Second mounting hole; 1016. Fourth side plate; 102. First slider; 1021. Second connecting part; 1022. First side plate; 1023. First connecting part; 1024. First slide rod; 1025. Second slide rod; 1026. Second side plate; 103. Second hydraulic cylinder; 104. First bracket; 1041. Guide rail; 105. First hydraulic cylinder; 200. Second mounting base; 300. Third mounting base; 301. Lead screw; 302. Second bracket; 303. Fifth connecting part; 400. Test cylinder; 500. Loading cylinder; 600. Main beam. Detailed Implementation

[0042] Various aspects and features of the present invention are described herein with reference to the accompanying drawings.

[0043] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of the invention will be apparent to those skilled in the art.

[0044] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the invention and, together with the general description of the invention given above and the detailed description of the embodiments given below, serve to explain the principles of the invention.

[0045] These and other features of the invention will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0046] It should also be understood that although the invention has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of the invention, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0047] The above and other aspects, features and advantages of the invention will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0048] Specific embodiments of the invention are described below with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of the invention, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the invention. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use the invention in various ways with substantially any suitable detailed structure.

[0049] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element 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.

[0050] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0051] In the description of this invention, "a plurality of" means two or more.

[0052] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0053] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0054] In the description of this invention, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

[0056] like Figure 1 and Figure 2 As shown, this embodiment provides a hydraulic cylinder test bench for placing a test cylinder 400 and applying a load to the test cylinder 400. Specifically, the hydraulic cylinder test bench includes a main beam 600, a first mounting base 100, a second mounting base 200, and a third mounting base 300. The first mounting base 100 and the third mounting base 300 are respectively installed on the left and right sides of the main beam 600. The second mounting base 200 is located between the first mounting base 100 and the third mounting base 300, and the second mounting base 200 is slidably connected to the main beam 600. Specifically, the second mounting base 200 is provided with a bearing wheel, and the second mounting base 200 is slidably connected to the side of the main beam 600 through the bearing wheel.

[0057] In this embodiment, the test cylinder 400 is disposed between the first mounting base 100 and the second mounting base 200. The end of the piston rod of the test cylinder 400 is connected to the first mounting base 100, and the cylinder body of the test cylinder 400 is connected to the second mounting base 200. A loading cylinder 500 is disposed between the second mounting base 200 and the third mounting base 300. The end of the piston rod of the loading cylinder 500 is connected to the third mounting base 300, and the cylinder body of the loading cylinder 500 is connected to the second mounting base 200. During testing, the extension and retraction of the test cylinder 400 can be driven by the movement of the second mounting base 200 to extend and retract the loading cylinder 500, thereby providing a load force for the test cylinder.

[0058] Specifically, such as Figure 3 As shown, in this embodiment, before the test, the piston rod of the test cylinder 400 is fully retracted, the second mounting seat 200 is in the first extreme position, which is the position close to the first mounting seat 100, and the piston rod of the loading cylinder 500 is fully extended.

[0059] During testing, the piston rod of the test cylinder 400 first extends out of the cylinder body, pushing the second mounting seat 200 to move away from the first mounting seat 100, thereby pushing the loading cylinder 500 to retract. Then, the loading cylinder 500 applies a load force to the test cylinder 400 in the opposite direction of the movement of the test cylinder 400 until the piston rod of the test cylinder 400 is fully extended and reaches the second limit position. Here, the limit position of the test cylinder 400 away from the first mounting seat 200 is taken as the second limit position.

[0060] When the test cylinder 400 is fully extended, it is retracted, pulling the second mounting base 200 to move towards the first limit position, which in turn pulls the loading cylinder 500 to extend. Then, the loading cylinder 500 applies a load force to the test cylinder 400 in the opposite direction of the movement of the test cylinder 400 until the test cylinder 400 is fully retracted and reaches the second limit position.

[0061] In this embodiment, a second mounting base 200 is provided, and the test cylinder 400 and the loading cylinder 500 are respectively connected to both sides of the second mounting base 200. In this way, when the test cylinder 400 moves, the loading cylinder 500 applies an action to the test cylinder 400 in the opposite direction of its movement through the second mounting base 200, thereby realizing the testing of the test cylinder 400.

[0062] Furthermore, in this embodiment, in order to meet the different height differences between the two ends of the test cylinder 400 in different working scenarios, this embodiment adjusts the height difference between the two ends of the test cylinder 400 by adjusting the first mounting base 100, so that the test is close to the real working conditions. The hydraulic cylinder test bench provided by the present invention has the ability to adjust the height difference.

[0063] Specifically, in this embodiment, such as Figure 4 and Figure 5 As shown, the first mounting base 100 includes a first slider 102, a first bracket 104, and a first hydraulic cylinder 105. The upper part of the first bracket 104 is provided with a guide rail 1041, which is vertically arranged. The first slider 102 is slidably connected to the guide rail 1041 and is horizontally arranged. The first slider 102 is connected to the end of the piston rod of the test cylinder 400. The first slider 102 is also connected to the first hydraulic cylinder 105. The axial direction of the first hydraulic cylinder 105 is parallel to the axial direction of the guide rail 1041. Under the drive of the first hydraulic cylinder 105, the first slider 102 can slide up and down along the guide rail 1041, thereby adjusting the height difference between the two ends of the test cylinder 400, so that the hydraulic cylinder test bench needs to have the ability to adjust the height difference.

[0064] Preferred, such as Figure 8 and Figure 9 As shown, the first hydraulic cylinder 105 is located below the first slider 102. When the piston rod of the first hydraulic cylinder 105 is fully retracted, the first slider 102, along with the end of the piston rod of the test cylinder 400, is at its lowest position, that is, the distance H0 between the first slider 102 and the main body of the first support 104 is the smallest. When the piston rod of the first hydraulic cylinder 105 is fully extended, the first slider 102, along with the end of the piston rod of the test cylinder 400, is at its highest position, that is, the distance H0 between the first slider 102 and the main body of the first support 104 is the largest.

[0065] like Figure 10 As shown, in this embodiment, the first cylinder 105 drives the first slider 102 to slide on the guide rail 1041, which can adjust the height difference between the two ends of the test cylinder 400 to any value. The adjustment process is simple and can adapt to the adjustment of the height difference under different working conditions.

[0066] Furthermore, such as Figure 6 As shown, the first slider 102 includes a first slide bar 1024 and a second slide bar 1025 arranged parallel to each other. Both ends of the first slide bar 1024 and both ends of the second slide bar 1025 are provided with a first connecting part 1023 that is slidably connected to the guide rail 1041.

[0067] The first slider 102 also includes a first side plate 1022 and a second side plate 1026 that are spaced apart from each other. The first slide rod 1024 and the second slide rod 1025 are installed between the first side plate 1022 and the second side plate 1025. The first connecting part 1023 is located outside the first side plate 1022 and the second side plate 1026.

[0068] Furthermore, the outer end of the first connecting part 1023 is provided with a second connecting part 1021, which is connected to the piston rod of the first oil cylinder 105. Preferably, there are two first oil cylinders 105, which can ensure that the first slider 102 moves up and down more smoothly.

[0069] During actual installation and use, due to machining and assembly errors, the position of the mounting base of the test cylinder 400 may deviate from the designed position. This causes the direction of the output force of the test cylinder 400 to be off-axis, resulting in an off-center load on the test cylinder 400. Therefore, the test bench needs to simulate the off-center load situation of the test cylinder 400.

[0070] Therefore, in this embodiment, as Figure 7As shown, in order to further meet the off-center load test requirements of the hydraulic cylinder test bench, a second slider 101 is installed on the first slider 102. The second slider 101 is slidably connected to the first slider 102, and the sliding direction of the second slider 101 is horizontal. The second slider 101 is rotatably connected to the piston rod end of the test cylinder 400. Specifically, the second slider 101 is connected to the piston rod end of the test cylinder 400 by a pin. The second slider 101 is also connected to the piston rod of the second hydraulic cylinder 103. The second hydraulic cylinder 103 drives the second slider 101 to slide on the first slider 102. Under the action of the second slider 101, the piston rod end of the test cylinder 400 shifts horizontally to the left and right.

[0071] Specifically, when installing the test cylinder 400, adjust the second slider 101 to the middle position of the first slider 102, such as... Figure 11 As shown, the distance between the second slider 102 and the first side plate 1022 is L0; the first side plate 1022 and the second side plate 1026 are used to limit the position of the second slider 101;

[0072] During the test, high-pressure fluid is introduced into the rod chamber of the second cylinder 103, and the rodless chamber is connected to the liquid tank. The second cylinder 103 retracts, pulling the second slider 102 towards the second cylinder 103, thus applying a lateral force to the test cylinder 400 mounted on the second slider 101 towards the second cylinder 103. Then, high-pressure fluid is introduced into the rodless chamber of the second cylinder 103, and the rod chamber is connected to the liquid tank. The second cylinder 103 extends, pushing the second slider 101 away from the second cylinder 103, thus applying a lateral force to the test cylinder 400 mounted on the second slider 101 towards the second cylinder 103.

[0073] During the test, the magnitude of the lateral load on the test cylinder 400 is controlled by adjusting the pressure of the high-pressure fluid in the second hydraulic cylinder 103. If the pressure of the high-pressure fluid remains constant during the test, the magnitude of the lateral load on the test cylinder 400 also remains constant.

[0074] In this embodiment, the second cylinder 103 drives the second slider 103 to move left and right, so that the test cylinder can be tested under off-center loading.

[0075] Furthermore, such as Figure 6As shown, the second slider 101 includes a third side plate 1011 and a fourth side plate 1016. The third side plate 1011 and the fourth side plate 1016 are connected as one unit by a third connecting part 1012. The third side plate 1011 is provided with a fourth connecting part 1013. The fourth connecting part 1013 is rotatably connected to the piston rod of the test cylinder 400. The fourth connecting part 1013 has a triangular structure and strong stability. The second slider 101 has a first mounting hole 1014 and a second mounting hole 1015 that pass through the third side plate 1011, the fourth side plate 1016 and the fourth connecting part 1013. The first mounting hole 1014 is slidably connected to the first slide rod 1024, and the second mounting hole 1015 is slidably connected to the second slide rod 1025. This ensures that the first side plate 1011 is in a horizontal state.

[0076] In order to meet the requirements of the hydraulic cylinder test for the working stroke size of the test bench, in this embodiment, the main beam 600 is provided with a plurality of stroke adjustment holes 601 along its axial direction. The corresponding stroke adjustment hole 601 can be selected according to the stroke size required for the hydraulic cylinder test. The third mounting seat 300 is connected to the stroke adjustment hole 601 by a pin to realize the coarse adjustment of the working stroke.

[0077] To further precisely adjust the working stroke of the hydraulic cylinder test bench, such as Figure 12 and Figure 13 As shown, the third mounting base 300 includes a second bracket 302 and a lead screw 301. The lead screw 301 is threadedly connected to the second bracket 302. A fifth connecting part 303 is connected to one end of the lead screw 301 near the loading cylinder 500. The fifth connecting part 303 is rotatably connected to the end of the piston rod of the loading cylinder 500. After coarse adjustment, the lead screw 301 is rotated to adjust its position on the second bracket 302, thereby achieving fine adjustment of the working stroke of the hydraulic cylinder test bench, that is, adjusting the distance D0 between the fifth connecting part 303 and the second bracket 302.

[0078] The present invention, by setting a first mounting base 100 with multi-degree-of-freedom adjustment function, can arbitrarily adjust the height difference between the two ends of the test cylinder 400 and the magnitude of the lateral load; it also sets a stroke adjustment mechanism consisting of a main beam 600 with a stroke adjustment hole 601, a second bracket 302 with a pin hole that mates with the stroke adjustment hole 601, and a lead screw 302, thereby realizing arbitrary adjustment of the working stroke.

[0079] The hydraulic cylinder test bench disclosed herein has the following advantages:

[0080] (1) The sliding pair consisting of the first slider 102 and the first bracket 104, controlled by the first hydraulic cylinder 105, moves up and down, driving one end of the test cylinder 400 to move up and down, thus adjusting the height difference between the two ends of the test cylinder 400. This adjustment method allows for arbitrary adjustment of the height difference between the two ends of the test cylinder 400. The adjustment process does not require disassembling the test cylinder 400, making it more convenient and efficient. It also eliminates the need to replace additional parts, reducing costs.

[0081] (2) The sliding pair consisting of the second slider 101 and the first slider 102 is controlled by the second oil cylinder 103 to move left and right, driving one end of the test cylinder 400 to move left and right. The magnitude of the lateral load is adjusted by adjusting the hydraulic pressure in the second oil cylinder 103. This adjustment process can quantitatively change the magnitude of the lateral load, making the control more precise and the adjustment process convenient and efficient.

[0082] (3) The working stroke is adjusted by the stroke adjustment hole of the main beam 600 and the pin hole on the second bracket 302, as well as the threaded connection between the second bracket 302 and the lead screw 301, so as to realize the continuous and precise adjustment of the working stroke. Moreover, the boltless connection is adopted, and the adjustment process is more time-saving and labor-saving.

Claims

1. A hydraulic cylinder test bench, characterized in that, It includes a main beam, a first mounting base, a second mounting base, and a third mounting base; the first mounting base and the third mounting base are respectively installed on the left and right sides of the main beam, and the second mounting base is disposed between the first mounting base and the third mounting base, and the second mounting base is slidably connected to the main beam; The test cylinder is positioned between the first mounting base and the second mounting base. The piston rod of the test cylinder is rotatably connected to the first mounting base, and the cylinder body of the test cylinder is rotatably connected to the second mounting base. The loading cylinder is positioned between the second mounting base and the third mounting base. The piston rod of the loading cylinder is rotatably connected to the third mounting base, and the cylinder body of the loading cylinder is rotatably connected to the second mounting base. During testing, the extension and retraction of the test cylinder can be driven by the movement of the second mounting base, thereby providing a load force to the test cylinder. The first mounting base includes a first slider, a first bracket, and a first hydraulic cylinder. The first bracket is provided with a guide rail, which is vertically arranged and perpendicular to the main beam. The first slider is slidably connected to the guide rail and connected to the piston rod of the test cylinder. The first slider is also connected to the first hydraulic cylinder. The vertical extension and retraction of the first hydraulic cylinder can drive the first slider to move up and down along the guide rail. The first mounting base also includes a second slider and a second hydraulic cylinder. The second slider is slidably mounted on the first slider and is rotatably connected to the piston rod of the test cylinder. The second slider is also connected to the piston rod of the second hydraulic cylinder. The lateral extension and retraction of the second hydraulic cylinder can drive the second slider to slide horizontally along the first slider.

2. The hydraulic cylinder test bench according to claim 1, characterized in that, The first slider includes a first slide rod and a second slide rod arranged parallel to each other. Both ends of the first slide rod and both ends of the second slide rod are provided with a first connecting part that is slidably connected to the guide rail. The first connecting part is provided with a second connecting part, and the second connecting part is connected to the piston rod of the first oil cylinder.

3. The hydraulic cylinder test bench according to claim 2, characterized in that, The first slider also includes a first side plate and a second side plate that are spaced apart from each other, the first slide rod and the second slide rod are installed between the first side plate and the second side plate, and the first connecting part is located on the outside of the first side plate and the second side plate.

4. The hydraulic cylinder test bench according to claim 2, characterized in that, The second slider includes a third side plate and a fourth side plate, which are connected as a whole by a third connecting part. The third side plate is provided with a fourth connecting part, which is rotatably connected to the piston rod of the test cylinder.

5. The hydraulic cylinder test bench according to claim 1, characterized in that, The main beam has multiple stroke adjustment holes along its axial direction, and the third mounting base is connected to the main beam through the stroke adjustment holes.

6. The hydraulic cylinder test bench according to claim 5, characterized in that, The third mounting base includes a second bracket and a lead screw. The lead screw is threadedly connected to the second bracket, and the second bracket is connected to the main beam through the stroke adjustment hole. The lead screw is connected to the piston rod of the loading cylinder.

7. The hydraulic cylinder test bench according to claim 6, characterized in that, The lead screw is connected to a fifth connecting part at one end near the loading cylinder, and the fifth connecting part is rotatably connected to the piston rod of the loading cylinder.

8. The hydraulic cylinder test bench according to claim 1, characterized in that, The second mounting base is provided with a bearing wheel, and the second mounting base is slidably connected to the side of the main beam through the bearing wheel.

Images