A hose fatigue testing device

Abstract

The application relates to the technical field of mechanical test tools, in particular to a rubber pipe fatigue test device which comprises a support, a pressurizing assembly, a pulley assembly and a power assembly, the pressurizing assembly is installed on the support, and the pressurizing assembly is provided with a rubber pipe connecting port; the pulley assembly comprises a first pulley, a first counterweight and a first vertical slide rail, the first slide rail is fixed on the support, the first pulley and the first counterweight are slidably connected to the first slide rail, and the first counterweight is provided with a rubber pipe fixing part; the power assembly is connected with the first pulley and can drive the first pulley to slide on the first slide rail. In the technical scheme, the first counterweight is used to apply a pulling force to the rubber pipe, the mass of the first counterweight is determined, the pulling force can be controlled to be invariable, the stability of test parameters can be controlled, and the test accuracy is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical test tooling, in particular to a rubber pipe fatigue test device. BACKGROUND

[0002] Forklift is an industrial handling vehicle, which is used for loading and unloading, stacking and short-distance transporting goods.

[0003] The basic function of loading and unloading, handling and stacking goods is realized by the mast and the accessory, the accessory completes the relevant operation according to the demand, the mast is provided with multiple levels, and the multiple masts are connected through pulley chains to form a telescopic structure to realize the lifting of the mast, and the accessory is lifted with the mast to realize the operation at different heights. The power for the accessory work comes from the hydraulic system of the forklift, and an oil supply rubber pipe is needed to connect between the hydraulic system and the accessory. The oil supply rubber pipe generally passes through the mast through a pulley and is lifted with the mast.

[0004] In order to ensure the safety in use, the fatigue test needs to be carried out on the oil supply rubber pipe. The applicant believes that in addition to simulating the actual working scene of the rubber pipe, the stability of the test parameters also needs to be maintained as much as possible to improve the accuracy of the test. SUMMARY

[0005] In order to simulate the actual working scene of the rubber pipe and improve the accuracy of the test, the present application provides a rubber pipe fatigue test device, which adopts the following technical scheme:

[0006] A rubber pipe fatigue test device, comprising:

[0007] a support;

[0008] a pressurizing assembly installed on the support, the pressurizing assembly being provided with a rubber pipe connecting port;

[0009] a pulley assembly, the pulley assembly comprising a first pulley, a first counterweight and a first vertical slide rail, the first slide rail being fixed on the support, the first pulley and the first counterweight being slidably connected to the first slide rail, the first counterweight being provided with a rubber pipe fixing portion;

[0010] a power assembly connected to the first pulley and capable of driving the first pulley to slide on the first slide rail.

[0011] The technical scheme is adopted, one end of the rubber tube is connected with the pressurizing assembly and fixed on the support, the rubber tube is wound around the first pulley and the other end of the rubber tube is fixed on the first counterweight, the pressurizing assembly is used to pass the filler such as liquid or gas into the rubber tube to have a certain pressure in the rubber tube, the pressure condition of the oil passing into the rubber tube in the actual working condition is simulated, the power assembly is started to drive the first pulley to move, the rubber tube wound around the first pulley moves with the movement, and the actual working condition of the rubber tube is simulated. The anti-fatigue performance of the rubber tube is judged by observing the liquid leakage, air leakage and crack of the rubber tube after a certain number of movements of the rubber tube.

[0012] The first counterweight is used to apply the pulling force to the rubber tube, the mass of the first counterweight is determined, the pulling force can be controlled to be constant, the stability of the test parameters is controlled, and the test accuracy is improved.

[0013] In one embodiment, the pulley assembly comprises a plate chain and a second pulley coaxial with the first pulley, one end of the plate chain is fixed on the support, the other end of the plate chain is wound around the second pulley and connected with the first counterweight.

[0014] By adopting the technical scheme, the stretching action of the power assembly on the pulley assembly will have acceleration and deceleration, such as acceleration from static to movement, and the first counterweight is difficult to maintain uniform motion, so that the pulling force on the rubber tube will change. By setting the plate chain, the stretching length of the rubber tube is constant, and the pulling force acting on the rubber tube is constant, so that the test accuracy is improved.

[0015] In one embodiment, the support is provided with a plate chain connector which can slide and adjust in the vertical direction, and the plate chain connector is connected with the plate chain.

[0016] By adopting the technical scheme, the tensioning degree of the rubber tube can be adjusted by moving the plate chain connector, and the pulling force of the first counterweight acting on the rubber tube can be adjusted. Compared with adjusting by increasing or decreasing the mass of the first counterweight, length adjustment is more convenient and easier to control.

[0017] In one embodiment, the rubber tube fatigue test device further comprises an adjusting assembly, the adjusting assembly comprises a first adjusting assembly for adjusting the position of the pulley assembly, and a second adjusting assembly for adjusting the position of the rubber tube connecting port and the plate chain connector.

[0018] By adopting the technical scheme, different specifications of rubber pipes are used in the test, and different rubber pipes are preferably matched with appropriate first pulleys. Different diameters of the first pulleys change the angle of the rubber pipes relative to the horizontal plane after installation, and the rubber pipes cannot be kept vertical during the test when it is desired to keep the rubber pipes vertical. The adjusting assembly can adjust the verticality of the rubber pipes. By adjusting the positions of the pulley assembly, the rubber pipe connecting port and the plate chain connecting piece, the verticality of the rubber pipes is adjusted, and the rubber pipes on both sides of the pulley assembly tend to be vertical.

[0019] In one of the embodiments, the first adjusting assembly and the second adjusting assembly are installed on the support, the first adjusting assembly is located above the first pulley, and the first adjusting assembly and the second adjusting assembly are both provided with horizontal sliding structures.

[0020] By adopting the technical scheme, the first adjusting assembly can make the section of the rubber pipe connected with the first counterweight vertical. The position of the rubber pipe connecting port on the second adjusting assembly is adjusted to keep the rubber pipe on one side connected with the rubber pipe connecting port and bypassing the first pulley vertical. The rubber pipe keeps vertical during the test, the winding arc of the rubber pipe around the first pulley does not change, and the stability of the test parameters is easy to control. If the rubber pipe is inclined, the winding arc of the rubber pipe around the first pulley will change all the time when the rubber pipe moves up and down, that is, the included angle of the straight lines on both sides of the pulley will change.

[0021] In one of the embodiments, the adjusting assembly further includes a third adjusting assembly, the third adjusting assembly adjusts the position of the connecting point when the plate chain is connected with the first counterweight, and the third adjusting assembly is provided with a sliding groove sliding structure.

[0022] By adopting the technical scheme, the third adjusting assembly adjusts the position of the plate chain to keep the plate chain parallel to the rubber pipe, so that the plate chain keeps synchronous movement with the rubber pipe when the pulley assembly moves, and keeps the tension of the first counterweight on the rubber pipe unchanged.

[0023] In one of the embodiments, the power assembly includes a gear set, a chain and a driving element. The chain has a first end and a second end. The first end is connected with the first pulley, and the second end passes through the gear set and is engaged with the gear set. The gear set includes at least one gear. The driving element drives the chain to move. The first gear through which the first end of the chain passes after being connected with the first pulley is arranged on the first adjusting assembly.

[0024] By adopting the technical scheme, the driving element drives the chain to pull the first pulley to move, the chain is wound on the gear, the gear can change the direction of force as a pulley, and thus the direction of the pulling force of the chain on the first pulley can not be affected by the initial power, i.e. the pulling force direction and the pulling force point of the driving element on the chain, which is beneficial to control the stability of the pulling force on the first pulley and improve the accuracy of the test.

[0025] In one of the embodiments, a second counterweight is connected to the second end of the hinge.

[0026] By adopting the technical scheme, the second end of the hinge is connected with the second counterweight to assist the chain to descend and keep the chain in a straightened state, which is helpful to improve the stability of the gear set operation and the stability of the chain pulling the pulley assembly to move.

[0027] In one of the embodiments, the power assembly further comprises a second sliding rail, which is vertically arranged on the support, and the second counterweight is slidably connected to the second sliding rail.

[0028] By adopting the technical scheme, the second counterweight is connected to the vertically arranged second sliding rail, which reduces the swing of the chain connected to the second counterweight, and is helpful to improve the stability of the gear set operation and the stability of the chain pulling the pulley assembly to move.

[0029] In one of the embodiments, the gear set comprises a driving gear and a plurality of reversing gears, the driving element is connected to the driving gear, and along the direction of the chain, the plurality of reversing gears are distributed before and after the driving gear, and the horizontal position of the driving gear is lower than that of the two reversing gears located before and after the driving gear.

[0030] By adopting the technical scheme, the meshing effect of the chain and the gear can be increased, the chain is less likely to slip, the chain can more stably drive the pulley assembly to move up and down, the stability of the test is improved, the speed of the motor can be controlled, the speed of the pulley assembly driving the rubber tube to move is controlled, the consistency of the speed in the test process is maintained, the accuracy of the test is improved, and the speed can be adjusted according to the test requirements to meet the test requirements of different movement speeds.

[0031] In summary, the present application has the following beneficial effects:

[0032] 1. The mass of the first counterweight is determined to control the constant pulling force, control the stability of the test parameters, and improve the test accuracy.

[0033] 2. The adjusting assembly is arranged to adjust the vertical angle of the rubber tube when testing different specifications of rubber tube, keep the vertical, control the direction of the pulling force, control the stability of the test parameters, improve the test accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a structural schematic diagram of the rubber tube fatigue test device of embodiment 1;

[0035] Figure 2 is Figure 1 is an enlarged view of A in

[0036] Figure 3 is Figure 2 is a structural schematic diagram of the gear set exposed by removing the shell;

[0037] Figure 4 is an exploded view of the pulley set and the first adjusting assembly of embodiment 1;

[0038] Figure 5 is Figure 1 is an enlarged view of B in

[0039] Figure 6 is a structural schematic diagram of the third adjusting assembly of embodiment 1 connecting the first counterweight and the plate chain;

[0040] In the figure, 100, support, 110, base, 120, vertical part,

[0041] 200, pressurizing assembly, 210, rubber tube connecting port,

[0042] 310, first pulley, 320, first counterweight, 330, first sliding rail, 340, plate chain, 350, second pulley, 360, plate chain connecting piece, 370, mounting seat, 380, sliding seat, 381, mounting groove,

[0043] 410, first adjusting assembly, 411, first sliding groove, 412, first sliding block, 420, second adjusting assembly, 421, second sliding groove, 430, third adjusting assembly, 431, connecting block, 432, third sliding block, 433, third sliding groove,

[0044] 510, first steering gear, 520, drive gear, 530, chain, 531, first end, 532, second end, 540, second counterweight, 550, second sliding rail,

[0045] 600, rubber tube. DETAILED DESCRIPTION

[0046] The present application will be further described in detail below in conjunction with the accompanying drawings.

[0047] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0048] Embodiment 1: A rubber tube fatigue test device, as shown in Figure 1 , comprising a support 100, a pressurizing assembly 200, a pulley assembly, a power assembly, and an adjusting assembly.

[0049] The support 100 comprises a base 110 and a vertical portion 120, which is fixedly installed on the base 110 in the vertical direction.

[0050] The pressurizing assembly 200 is connected to the support base 110, and the pressurizing assembly 200 is provided with a rubber tube interface 210 for connecting to a rubber tube 600 to be tested. The pressurizing assembly 200 can be a device such as a hydraulic pump that can introduce a filler such as a liquid or gas into the rubber tube 600 to have a certain pressure in the rubber tube, and is provided with a pressure sensor and display device.

[0051] As shown in Figure 2 , the pulley assembly comprises a first pulley 310, a second pulley 350, a plate chain 340, a first counterweight 320, a first sliding rail 330, and a sliding seat 380. The first sliding rail 330 is fixed on the vertical portion 120 of the support in the vertical direction, and the first counterweight 320 and the sliding seat 380 are slidably connected to the first sliding rail 330.

[0052] As shown in Figure 3 Figure 4 , the first pulley 310 and the second pulley 350 are installed on the same mounting seat 370 to realize coaxial rotation, and the mounting seat 370 is detachably installed on the sliding seat 380, which facilitates replacement of the sliding seat 380 or the pulley.

[0053] The plate chain 340 is wound around the second pulley 350, and one end is connected to a plate chain connector 360 provided on the support base 110, and the other end is connected to the first counterweight 320. The first counterweight 320 is also provided with a rubber tube connecting portion to connect with the rubber tube.

[0054] As shown in Figures 2 to 6 , the adjusting assembly comprises a first adjusting assembly 410 for adjusting the positions of the coaxial first pulley 310 and the second pulley 350, a second adjusting assembly 420 for adjusting the positions of the rubber tube connecting port 210 and the plate chain connector 360, and a third adjusting assembly 430 for adjusting the verticality of the plate chain 340.

[0055] The first adjusting assembly 410 and the second adjusting assembly 420 can adjust the vertical angle of the rubber tube. Specifically, the first adjusting assembly 410 is arranged on the bracket base 110 and above the pulley assembly, the top of the vertical part 120 is provided with a first sliding groove 411 and a first sliding block 412 which can slide along the first sliding groove 411, and the first sliding block 412 can be tightened by a screw to prevent the first sliding block 412 from continuing to slide. The mounting seat 370 is provided with a mounting groove 381, and the mounting seat 370 can slide along the mounting groove 381 to adjust the mounting position, and the position is fixed by tightening the screw. The mounting seat 370, the first sliding block 412 and the corresponding sliding structure constitute the first adjusting assembly 410.

[0056] As shown in Figure 5 , the second adjusting assembly 420 is fixed on the bracket base 110 and provided with a second sliding groove 421, the rubber tube connecting port 210 and the plate chain connecting piece 360 can move along the second sliding groove 421, and the plate chain connecting piece 360 can move in the vertical direction, and the rubber tube connecting port 210 and the plate chain connecting piece 360 can be prevented from continuing to move by tightening the screw to be fixed.

[0057] The third adjusting assembly 430 adjusts the verticality of the section where the plate chain 340 is connected with the first counterweight 320. Specifically, as shown in Figure 6 , the third adjusting assembly 430 includes a connecting plate 431 and a third sliding block 432, the connecting plate is provided with a third sliding groove 433 which is opened in the horizontal direction, the third sliding block 432 is slidably installed on the sliding groove 433, the connecting plate 431 is connected with the first counterweight 320, the sliding block 432 is connected with the plate chain 340, or the connecting plate 431 is connected with the plate chain 340 and the sliding block is connected with the first counterweight 320.

[0058] The power assembly includes a gear set, a chain 530, a driving element, a second counterweight 540 and a second sliding rail 550, the second sliding rail 550 is installed on the vertical part 120, and the second counterweight 540 is slidably connected to the second sliding rail 550. The chain 530 has two ends, which are called the first end 531 and the second end 532, the mounting seat 370 is connected with the first end 531 through the mounting groove 381, the second end 532 is engaged with the gear set through the gear set and finally connected to the second counterweight 540.

[0059] The gear set includes a driving gear 520 and a plurality of reversing gears, and the driving element can be set as a motor such as a servo motor, the driving element is connected with the driving gear 520 for driving the driving gear 520 to rotate in forward and reverse directions to rotate uniformly to drive the gear set and the chain 530 to move, drive the pulley assembly to reciprocate, and different rotating speeds can be set according to requirements.

[0060] The first end 531 of the chain after connecting the first pulley 310 passes through the first gear arranged on the first adjusting assembly, which is referred to as the first steering gear 510, and the first steering gear 510 is installed on the first sliding block 421 of the first adjusting member 410.

[0061] A plurality of reversing gears are distributed in front of and behind the driving gear 520 along the chain direction, and the horizontal position of the driving gear 520 is lower than that of the two reversing gears located in front and behind the driving gear 520.

[0062] In Example 2, the force of the first counterweight 310 acting on the rubber tube is constant, but the size of the force cannot be determined. In order to maintain a constant force while also knowing the size of the pulling force on the rubber tube 600, the rubber tube connecting port 210 is provided with a pulling force sensor, which monitors the pulling force of the first counterweight 320 acting on the rubber tube 600.

[0063] Working principle:

[0064] During the test, one end of the rubber tube 600 to be tested is connected to the pressurizing assembly and fixed to the support base 110. The rubber tube 600 is wound around the first pulley 310, and the other end of the rubber tube 600 is fixed to the first counterweight 320 to keep the rubber tube port sealed. The pressurizing assembly is used to introduce liquid or gas into the rubber tube to simulate the pressure condition of the oil in the rubber tube under actual working conditions.

[0065] The first adjusting assembly 410 is adjusted to keep the section of the rubber tube connected to the first counterweight 410 vertical. The second adjusting member 420 is then adjusted to keep the section of the rubber tube connected to the rubber tube connecting port 210 vertical, and the section of the plate chain 340 connected to the plate chain connecting member 360 vertical. The section of the plate chain 340 connected to the first counterweight 320 moves along the third sliding groove 433 of the third adjusting assembly 430 under the vertical pulling force of the first counterweight 320, so that the plate chain 340 remains vertical. The length of the plate chain 360 is adjusted in the vertical direction to adjust the size of the force of the first counterweight 310 acting on the rubber tube. Then the speed and other parameters of the servo motor are set, and the servo motor is started to drive the driving gear 520 to rotate, which drives the zipper 530 on the gear set to move, thereby pulling the first pulley and the second pulley to move, and the rubber tube and the plate chain on the pulleys move with them. The rubber tube moves up and down with the first pulley to simulate the actual working condition of the rubber tube. After a certain number of movements of the rubber tube, the leakage, air leakage, and cracks of the rubber tube are observed to determine the fatigue resistance of the rubber tube.

[0066] The embodiments of the present application are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, and thus: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A hose fatigue testing apparatus characterized by comprising: The utility model relates to a kind of rubber tube fatigue test device, including: Support (100); Pressurizing assembly (200), the pressurizing assembly is installed to the support (100), the pressurizing assembly (200) is provided with rubber tube connecting port (210); Pulley assembly, the pulley assembly includes first pulley (310), first counterweight (320) and vertically arranged first slide rail (330), the first slide rail (330) is fixed on support (100), the first pulley (310) and the first counterweight (320) are slidably connected on the first slide rail (330), the first counterweight (320) is provided with rubber tube fixing part; Power assembly, the power assembly is connected the first pulley (310) and can drive the first pulley (310) on the first slide rail (330) slip; The pulley assembly further includes plate chain (340) and second pulley (350), the second pulley (350) is coaxial with the first pulley (310), the plate chain (340) one end is fixed on support (100), the other end passes over the second pulley (350) and is connected with the first counterweight (320); The rubber tube fatigue test device further includes adjusting assembly, the adjusting assembly includes first adjusting assembly (410) for adjusting the position of the pulley assembly, and second adjusting assembly (420) for adjusting the position of the rubber tube connecting port (210) and plate chain connecting piece (360); The first adjusting assembly (410) and second adjusting assembly (420) are installed to support (100), the first adjusting assembly (410) is located above the first pulley (310), and the first adjusting assembly (410) and the second adjusting assembly (420) are each provided with horizontal direction sliding structure; The adjusting assembly further includes third adjusting assembly (430), the third adjusting assembly (430) adjusts the position of the connecting point when the plate chain (340) is connected with the first counterweight (320), and the third adjusting assembly (430) is provided with sliding groove sliding structure.

2. The hose fatigue testing apparatus of claim 1, wherein: The support (100) is provided with plate chain connecting piece (360) connected with the plate chain (340), and the plate chain connecting piece is used to be connected with the second adjusting assembly (420).

3. The hose fatigue testing apparatus of claim 1, wherein: The power assembly includes gear set, chain (530) and driving element, the chain (530) has first end (531) and second end (532), the first end (531) is connected with the first pulley (310), the gear set includes at least one gear, the chain (530) passes through the gear set and is engaged with the gear set, the driving element is used to drive the chain (530) movement, and the first end (531) is connected after the first pulley (310) passes through first gear, and the first adjusting assembly (410) is arranged on.

4. A hose fatigue testing apparatus as claimed in claim 3, wherein: Second end (532) of the chain (530) is connected with second counterweight (540).

5. A hose fatigue testing apparatus as claimed in claim 4, wherein: The power assembly further comprises a second sliding rail (550) vertically arranged on the support (100), and the second counterweight (540) is slidably connected to the second sliding rail (550).

6. The hose fatigue testing apparatus of claim 3, wherein: The gear set comprises a driving gear (520) and a plurality of reversing gears, the driving element is connected with the driving gear (520); along the direction of the chain (530), the plurality of reversing gears are distributed before and after the driving gear (520), and the horizontal position of the driving gear (520) is lower than that of the two reversing gears before and after the driving gear (520); the driving element is a motor, and the motor can be set to different rotating speeds.

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