Performance testing device for automobile brake hose

Abstract

The invention relates to the technical field of automobile part testing, in particular to a performance testing device for an automobile brake hose, which comprises a connecting frame, a two-shaft electric platform, an electric control rotating frame and the like, two two-shaft electric platforms are mounted on the connecting frame; each two-shaft electric platform is connected with an electric control rotating frame. And the two electric control rotating frames are symmetrically arranged. The first driving part drives the insertion pipe to fit the screw joint, the operation of screwing the screw joint is omitted under the condition of realizing sealing, the convenience of mounting and dismounting the brake hose is improved, the test efficiency is improved, the displacement of the screw joint is limited through the limiting groove, the screw joint is prevented from twisting when being connected with the insertion pipe, and the service life of the brake hose is prolonged. The situation that local internal stress of the brake hose is increased due to torsion, and the brake hose is damaged in advance in the pulse pressure resistance test is avoided, and the accuracy of the pulse pressure resistance test is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive component testing, and particularly to a performance testing device for automotive brake hoses. Background Art

[0002] Existing automotive brake hoses usually need to be subjected to factory tests, and one of the tests is the pulse pressure resistance test, that is, connecting the brake hose to the hydraulic circuit of the pulse pressure resistance test device, and applying periodic pressure pulses to the brake hose by controlling the hydraulic circuit to simulate the load of frequent braking of the automotive braking system, so as to detect the durability and reliability of the brake hose under dynamic pressure cycling; however, before the pulse pressure resistance test, the two ends of the brake hose need to be connected to the pulse pressure resistance test device, and the connection method of the brake hose is usually threaded connection. Therefore, when installing and disassembling the brake hose, the nut needs to be repeatedly screwed, the operation is cumbersome, and the test efficiency is reduced. Moreover, in order to simulate the bending state of the brake hose in the actual working condition, during the test, the brake hose needs to be in a bent state, and when the operator bends the brake hose and screws the nut, the brake hose is easily twisted circumferentially, so that the local internal stress of the brake hose increases. If the pulse pressure resistance test is carried out in this state, the twisted part of the brake hose is easily damaged in advance, thus reducing the accuracy of the pulse pressure resistance test result.

[0003] In summary, the present application proposes a performance testing device for automotive brake hoses to improve the above-mentioned technical problems. Summary of the Invention

[0004] In order to overcome the disadvantages that during the process of the operator installing the brake hose onto the test device, the nut needs to be repeatedly screwed, resulting in cumbersome installation operation, reduced test efficiency, and easy twisting of the brake hose in the bent state, increasing the local internal stress and affecting the accuracy of the test result, the present invention provides a performance testing device for automotive brake hoses.

[0005] Technical solution: A performance testing device for automotive brake hoses, including a connecting frame; also including a two-axis electric platform, an electronically controlled rotating frame, a fixed frame, a first driving member, a pressing plate, and an insertion connecting pipe; two two-axis electric platforms are installed on the connecting frame; each two-axis electric platform is connected to an electronically controlled rotating frame; the two electronically controlled rotating frames are symmetrically arranged; each electronically controlled rotating frame is rotatably connected to a fixed frame for fixing the brake hose; several slots are opened on each fixed frame; a limiting groove for preventing the brake hose from twisting is opened on each fixed frame; the limiting groove communicates with the adjacent slot; the contour size of the limiting groove matches the inside of the screw joint of the brake hose; several first driving members are fixedly connected to each fixed frame; all the telescopic ends of the first driving members on the same fixed frame are jointly fixedly connected to a pressing plate; a first cavity is opened in each pressing plate; the two first cavities are respectively connected to the liquid inlet and outlet of an external circulating hydraulic system; several insertion connecting pipes are fixedly connected to each pressing plate, and the insertion connecting pipes are aligned with the adjacent limiting grooves; the insertion connecting pipes are fitted with the inside of the screw joint.

[0006] As an improvement to the above solution, in the performance testing device for automotive brake hoses, it also includes a liquid storage frame; a liquid storage frame for storing mud is fixedly connected to the middle of the connecting frame; the liquid storage frame is located between the two two-axis electric platforms; the liquid storage frame is provided with a liquid inlet and a liquid outlet.

[0007] As an improvement to the above solution, in the performance testing device for automotive brake hoses, it also includes an auxiliary testing system; the auxiliary testing system includes a driving component, a mounting frame, a blowing plate, a connecting pipe, and a corrugated pipe; a driving component is installed on the connecting frame; several mounting frames are connected to the driving component; a blowing plate is installed on each mounting frame; a connecting pipe is connected to the driving component; the connecting pipe is communicated with an external air supply device; a second cavity is opened in each blowing plate; several exhaust ports for shortening the time required for mud to dry are opened on each blowing plate, and all the exhaust ports communicate with the adjacent second cavity; a corrugated pipe is communicated between the connecting pipe and each second cavity.

[0008] As an improvement to the above solution, in the performance testing device for automotive brake hoses, the driving component includes a second driving member, a connecting plate, a slide rail, and an electric slider; several second driving members are fixedly connected to the connecting frame; all the telescopic ends of the second driving members are jointly fixedly connected to the connecting plate, and the connecting pipe is fixedly connected to the connecting plate; a slide rail is fixedly connected to the connecting plate; several electric sliders are slidably connected to the slide rail; each electric slider is fixedly connected to the adjacent mounting frame.

[0009] As an improvement to the above solution, a rubber sealing washer is provided on the insertion connecting pipe.

[0010] As an improvement to the above solution, a rubber valve is provided in each exhaust port.

[0011] As an improvement to the above solution, the connecting pipe and the peripheral gas supply device are connected through an electric three-way valve; the other port of the electric three-way valve is communicated with the peripheral water supply device.

[0012] As an improvement to the above solution, in the performance testing device for automotive brake hoses, there are also a direct drive motor, a rotary joint, and a rotating rod; a direct drive motor is fixedly connected to each mounting bracket; the air blowing plate is rotatably connected to the mounting bracket; the rotating shaft of each air blowing plate is fixedly connected to the output end of the adjacent direct drive motor; a rotary joint is communicated between each air blowing plate and the adjacent corrugated pipe; a rotating rod is rotatably connected to each air blowing plate; a cylindrical impact block for simulating the impact of gravel on the brake hose is clamped on each rotating rod, and the cylindrical impact block is made of stone.

[0013] As an improvement to the above solution, in the performance testing device for automotive brake hoses, there are also a micro pump, a liquid discharge plate, a liquid outlet pipe, and a liquid inlet pipe; a micro pump for sucking mud is fixedly connected to each air blowing plate; a liquid discharge plate is fixedly connected to each air blowing plate; the liquid discharge plate is located above the adjacent exhaust port; a liquid discharge groove is formed on the lower side of each liquid discharge plate; a liquid outlet pipe is communicated between the liquid discharge groove and the liquid outlet of the adjacent micro pump; a liquid inlet pipe is communicated with the liquid inlet of the micro pump; the lowest point of the liquid inlet pipe is adjacent to the lowest side of the adjacent air blowing plate.

[0014] As an improvement to the above solution, the air blowing plate is made of wear-resistant and corrosion-resistant aluminum alloy material.

[0015] Beneficial effects: The insertion pipe is driven by the first driving member to fit the screw joint. In the case of achieving sealing, the operation of tightening the screw joint is omitted, improving the convenience of installing and disassembling the brake hose, improving the testing efficiency. Moreover, the displacement of the screw joint is restricted by the limiting groove, preventing the screw joint from twisting when connected to the insertion pipe, avoiding the situation that the local internal stress of the brake hose increases due to twisting, and preventing the brake hose from being damaged in advance during the pulse pressure resistance test, improving the accuracy of the pulse pressure resistance test; When the brake hose is in a straight state, the two-axis electric platform drives the two fixing brackets to move away from each other, making the brake hose in a stressed and stretched state to detect the tensile resistance performance of the brake hose, avoiding using an additional device to test the tensile resistance performance of the brake hose, improving the testing efficiency of the brake hose, and at the same time reducing the testing cost; By making a layer of mud adhere to the surface of the brake hose and then conducting a pulse pressure resistance test on the brake hose, simulating the situation of the brake hose working for a long time under the mud wrapping, making the test conditions fit the actual use conditions, and improving the diversity of the test conditions. Description of the drawings

[0016] Figure 1Schematic three-dimensional structure diagram of the performance testing device for an automotive brake hose of the present invention; Figure 2 Installation state diagram of the brake hose of the present invention; Figure 3 Schematic three-dimensional structure diagram of the brake hose of the present invention; Figure 4 Schematic three-dimensional structure diagram of the combination of the fixing bracket, pressing plate and insertion pipe of the present invention; Figure 5 Bending state diagram of the brake hose of the present invention; Figure 6 Schematic three-dimensional structure diagram of the combination of the connecting bracket and the auxiliary testing system of the present invention; Figure 7 Rotating state diagram of the rotating rod of the present invention; Figure 8 Cross-sectional view of the air blowing plate of the present invention; Figure 9 Combined side view of the brake hose and the air blowing plate of the present invention, where the air blowing plate is in a sectional view.

[0017] Names of the reference numerals in the figure: 1 - connecting bracket, 2 - fixing bracket, 2001 - slot, 2002 - limiting groove, 3 - pressing plate, 3001 - first cavity, 4 - insertion pipe, 5 - brake hose, 5001 - screw joint, 201 - two-axis electric platform, 202 - electric control rotating frame, 203 - first driving member, 204 - liquid storage frame, 301 - second driving member, 302 - connecting plate, 303 - slide rail, 304 - electric slider, 305 - mounting frame, 306 - air blowing plate, 30601 - second cavity, 30602 - exhaust port, 307 - connecting pipe, 308 - corrugated pipe, 401 - direct drive motor, 402 - rotary joint, 403 - rotating rod, 40301 - cylindrical impact block, 404 - micro pump, 405 - liquid drainage plate, 406 - liquid outlet pipe, 407 - liquid inlet pipe. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Embodiment 1 Refer to Figures 1-9 As shown, a performance testing device for an automotive brake hose includes a connecting bracket 1; It also includes a two-axis electric platform 201, an electric control rotating frame 202, a fixed frame 2, a first driving member 203, a pressing plate 3 and an inserting pipe 4; two two-axis electric platforms 201 are installed on the connecting frame 1; each two-axis electric platform 201 is connected with an electric control rotating frame 202; the two electric control rotating frames 202 are symmetrically arranged; the adjacent electric control rotating frame 202 is driven by the two-axis electric platform 201 to move up and down and left and right; each electric control rotating frame 202 is rotatably connected with a fixed frame 2; the fixed frame 2 is driven to rotate by the electric control rotating frame 202; the electric control rotating frame 202 is composed of a bottom frame and a servo motor, and the output shaft of the servo motor is fixedly connected with the fixed frame 2; four slots 2001 are formed in each fixed frame 2; a preventing limiting groove 2002 is formed in each fixed frame 2; the limiting groove 2002 communicates with the adjacent slot 2001; the contour dimension of the limiting groove 2002 matches the inside of the screw joint 5001 of the brake hose 5; two first driving members 203 are fixedly connected to each fixed frame 2, and the first driving member 203 is an electric push rod; the telescopic ends of all the first driving members 203 on the same fixed frame 2 are commonly fixedly connected with a pressing plate 3; a first cavity 3001 is formed in each pressing plate 3; the two first cavities 3001 are respectively connected with the liquid inlet and the liquid outlet of the external circulating hydraulic system; four inserting pipes 4 are fixedly connected to each pressing plate 3, and the inserting pipe 4 is opposite to the adjacent limiting groove 2002; the inserting pipe 4 is fitted with the inside of the screw joint 5001.

[0020] It also includes a liquid storage frame 204; a liquid storage frame 204 is fixedly connected to the middle of the connecting frame 1; the liquid storage frame 204 is located between the two two-axis electric platforms 201; a liquid inlet and a liquid outlet are arranged on the liquid storage frame 204.

[0021] It also includes an auxiliary test system; the auxiliary test system includes a driving component, a mounting frame 305, a blowing plate 306, a connecting pipe 307 and a corrugated pipe 308; the driving component is installed on the connecting frame 1; eight mounting frames 305 are connected to the driving component; the mounting frame 305 is driven by the driving component to move up and down and back and forth; a blowing plate 306 is installed on each mounting frame 305; the connecting pipe 307 is connected to the driving component; the connecting pipe 307 is communicated with an external air supply device; a second cavity 30601 is formed in each blowing plate 306; a number of exhaust ports 30602 are formed in each blowing plate 306, and all the exhaust ports 30602 communicate with the adjacent second cavity 30601; a corrugated pipe 308 is communicated between the connecting pipe 307 and each second cavity 30601.

[0022] The driving assembly includes a second driving member 301, a connecting plate 302, a slide rail 303 and an electric slider 304; two second driving members 301 which are symmetrically arranged front and back are fixedly connected to the connecting frame 1, and the second driving member 301 is an electric push rod; the telescopic ends of all the second driving members 301 are fixedly connected to a connecting plate 302 together, and the communicating pipe 307 is fixedly connected to the connecting plate 302; the slide rail 303 is fixedly connected to the lower side of the connecting plate 302; eight electric sliders 304 are slidably connected to the slide rail 303; each electric slider 304 is fixedly connected to an adjacent mounting bracket 305.

[0023] Furthermore, to improve the sealing performance between the insertion pipe 4 and the screw joint 5001, a rubber sealing gasket is provided on the insertion pipe 4.

[0024] Furthermore, to avoid the situation that the exhaust port 30602 is blocked by mud, a rubber valve is provided in each exhaust port 30602.

[0025] Furthermore, to simulate the situation where the bent part of the brake hose 5 comes into contact with water after the vehicle passes through a puddle after frequent braking, the communicating pipe 307 is connected to an external air supply device through an electric three-way valve; the other port of the electric three-way valve is communicated with an external water supply device.

[0026] It further includes a direct drive motor 401, a rotary joint 402 and a rotating rod 403; a direct drive motor 401 is fixedly connected to each mounting bracket 305; the blowing plate 306 is rotatably connected to the mounting bracket 305; the rotating shaft of each blowing plate 306 is fixedly connected to the output end of the adjacent direct drive motor 401; a rotary joint 402 is communicated between each blowing plate 306 and the adjacent corrugated pipe 308; a rotating rod 403 is rotatably connected to each blowing plate 306; a cylindrical impact block 40301 is clamped on each rotating rod 403, and the cylindrical impact block 40301 is made of stone.

[0027] During the pulse withstand voltage test, to solve the problems of cumbersome operation of installing and disassembling the brake hose 5, which reduces the test efficiency, and at the same time to solve the problem that the pulse withstand voltage test result accuracy decreases due to the torsion of the brake hose 5 during installation, the following describes the test process of the brake hose 5 in detail: Before the pulse withstand voltage test, as Figure 2As shown, the fixing bracket 2 and the pressing plate 3 are initially in a horizontal state, and the distance between the opposite sides of the two fixing brackets 2 is less than the distance between the two screw joints 5001 on the brake hose 5. Subsequently, the staff sequentially snap the screw joints 5001 of the brake hose 5 into the corresponding slots 2001, so that the screw joints 5001 are embedded into the corresponding limit slots 2002. At this time, the brake hose 5 is in a straight state without torsion. Then, control the first driving member 203 to drive the adjacent pressing plates 3 to move towards each other, so that the insertion pipe 4 is engaged with the corresponding screw joint 5001. Since the screw joint 5001 is stuck in the limit slot 2002 and cannot move, the end face of the insertion pipe 4 is pressed against the end face of the screw joint 5001 by the pressure applied to the pressing plate 3 by the first driving member 203, ensuring the sealing between the insertion pipe 4 and the screw joint 5001; it should be noted here that by providing a rubber sealing gasket on the insertion pipe 4, the sealing between the insertion pipe 4 and the screw joint 5001 is further ensured; then, taking the front-to-back as the reference, control the servo motor in the right-side electric control rotating frame 202 to drive the right-side fixing bracket 2 to rotate counterclockwise by 90 degrees, control the servo motor in the left-side electric control rotating frame 202 to drive the left-side fixing bracket 2 to rotate counterclockwise by 90 degrees, and during the rotation of the fixing bracket 2, synchronously control the two-axis electric platform 201 to drive their respective electric control rotating frames 202 to move upward, and make the two electric control rotating frames 202 move towards each other, so that both ends of the brake hose 5 are bent upward, as Figure 5 shown. At this time, the brake hose 5 is bent into a U shape. Then, control the peripheral circulating hydraulic system to deliver brake fluid into the first cavity 3001 on the right side, so that the brake fluid passes through the right-side insertion pipe 4, the brake hose 5, the left-side insertion pipe 4, and the left-side first cavity 3001, and then flows back to the peripheral circulating hydraulic system. During the circulation process, a periodic pressure pulse is applied to the brake hose 5 by the peripheral circulating hydraulic system, so as to detect the durability and reliability of the brake hose 5 in a conventional use scenario.

[0028] Compared with the conventional installation method, in the present invention, the first driving member 203 drives the insertion pipe 4 to fit the screw joint 5001. In the case of achieving sealing, the operation of tightening the screw joint 5001 is omitted, thereby improving the convenience of installing and disassembling the brake hose 5, and thus improving the test efficiency. Moreover, the displacement of the screw joint 5001 is avoided by the limit slot 2002, preventing the screw joint 5001 from twisting when connected to the insertion pipe 4, thereby avoiding the increase of local internal stress in the brake hose 5 due to torsion, and further preventing the situation that the brake hose 5 is prematurely damaged during the pulse withstand voltage test, improving the accuracy of the pulse withstand voltage test.

[0029] On this basis, considering that the existing pulse voltage withstand test is divided into a static test (detecting when the brake hose 5 is in a stationary state) and a dynamic test (detecting when the brake hose 5 is in a moving state, simulating vehicle operation, and the brake hose 5 moves), when performing the static pulse voltage withstand test, since the brake hose 5 has different bending degrees when installed on the vehicle brake system, therefore, by controlling the electric control rotating frame 202 to adjust the rotation angles of the two fixing frames 2, and at the same time by controlling the two-axis electric platform 201 to adjust the distance between the two fixing frames 2, so as to adjust the bending degree of the brake hose 5, and then detect the durability and reliability of the brake hose 5 under different static bending stresses. Moreover, when the brake hose 5 is in a straight state, the two-axis electric platform 201 drives the two fixing frames 2 to move away from each other, so that the brake hose 5 is in a stressed tensile state, thereby detecting the tensile resistance performance of the brake hose 5. In this way, it is avoided to use an additional device to test the tensile resistance performance of the brake hose 5, improving the test efficiency of the brake hose 5 and reducing the test cost at the same time.

[0030] When performing the dynamic pulse voltage withstand test, by controlling the two-axis electric platform 201 on one side to drive the corresponding fixing frame 2 to move left and right repeatedly, so that the lowest point of the brake hose 5 in the U-shaped state is in a dynamic bending state, thereby detecting the durability and reliability of the brake hose 5 under dynamic bending stress. On this basis, by controlling the two-axis electric platform 201 to drive the corresponding fixing frame 2 to adjust up and down, so that one screw joint 5001 of the brake hose 5 is higher than the other screw joint 5001, thereby changing the dynamic bending part of the brake hose 5, so as to perform dynamic bending tests on different parts of the brake hose 5, thus improving the diversity of the dynamic pulse voltage withstand test. Here it is noted that when performing the static pulse voltage withstand test, the bending part of the brake hose 5 is changed in the same operation mode as above, so as to perform static bending tests on different parts of the brake hose 5 and improve the diversity of the static voltage withstand test.

[0031] It is also considered that the brake hose 5 is usually close to the tire in actual settings. When the vehicle is driving on a road section with poor road conditions (such as passing through a mud pit) and frequent braking is often required, at this time, the vehicle tire enters the mud pit, and a layer of mud is easily attached to the surface of the brake hose 5. The mud will affect the heat dissipation of the brake hose 5. Especially in the case of frequent braking, it is easy for cracks to appear on the surface of the brake hose 5 due to non-uniform heating, affecting the service life of the brake hose 5. The test conditions of the conventional pulse pressure resistance test device for the brake hose 5 are relatively ideal and do not consider the situation of the brake hose 5 being used in vehicles that often drive on mountain roads such as off-road vehicles. Therefore, in the case of the brake hose 5 being used in vehicles that often drive on mountain roads such as off-road vehicles, before performing static or dynamic pulse pressure resistance testing, first inject mud into the liquid storage frame 204 through the liquid inlet on the liquid storage frame 204, and then control the two-axis electric platform 201 to drive the fixing frame 2 and the brake hose 5 to move downward synchronously, so that the brake hose 5 is immersed in the mud in the liquid storage frame 204, and then move the brake hose 5 upward to separate it from the mud, so that a layer of mud is attached to the surface of the brake hose 5. Subsequently, perform pulse pressure resistance testing on the brake hose 5 to simulate the situation of the brake hose 5 working for a long time under the mud wrap, making the test conditions fit the actual use conditions, thereby improving the diversity of the test conditions.

[0032] On this basis, considering that it takes a relatively long time for the mud to dry on the brake hose 5, which reduces the detection efficiency. Therefore, after the brake hose 5 is separated from the mud in the liquid storage frame 204, first control the two two-axis electric platforms 201 to drive their respective fixing frames 2 to move away from each other, and at the same time control the electric control rotating frame 202 to rotate to the initial position, so that the brake hose 5 is in the initial straight state. Then control the second driving member 301 to drive the connecting plate 302 and its connecting parts to move downward, so that the exhaust ports 30602 on both sides of the air blowing plate 306 are aligned with the brake hose 5. At this time, control the electric control three-way valve on the connecting pipe 307 to open, so that the connecting pipe 307 is connected to the external air supply device. Then, send warm air into the connecting pipe 307 through the external air supply device, so that the warm air passes through the corrugated pipe 308, the rotary joint 402, and the second cavity 30601, and then blows from the exhaust port 30602 to the surface of the brake hose 5. And while blowing air, control the two two-axis electric platforms 201 to drive their respective fixing frames 2 to move left and right synchronously, so that the brake hose 5 moves left and right in a straight state, so that the warm air flow blows over the surface of the brake hose 5 in turn, and the moisture evaporation of the mud on the surface of the brake hose 5 is accelerated by the warm air, shortening the time required for the mud to dry. After the mud on the surface of the brake hose 5 is dry, then perform a pulse withstand voltage test to improve the test efficiency. Further, after the mud on the surface of the brake hose 5 is dry, the brake hose 5 can be immersed in the mud in the liquid storage frame 204 again, and then the drying operation is performed. In this way, the thickness of the mud on the surface of the brake hose 5 can be increased, and the brake hose 5 can be subjected to a pulse withstand voltage test under different mud thicknesses, making the test conditions more abundant. Here, it should be noted that when the mud on the upper surface of the brake hose 5 moves left and right, at this time, the air blowing plate 306 is relatively close to the brake hose 5, and there is a situation where the mud splashes into the exhaust port 30602. Therefore, the rubber valve on the exhaust port 30602 blocks the mud from splashing into the exhaust port 30602, thus avoiding the situation where the exhaust port 30602 is blocked due to the mud.

[0033] Furthermore, after frequent braking of the brake hose 5, the temperature of the brake fluid will increase. If the surface of the brake hose 5 comes into contact with water at this time, it is easy to cause a sudden change in the surface temperature of the brake hose 5. Repeatedly like this will accelerate the material fatigue of the brake hose 5 and reduce the pressure resistance performance of the brake hose 5. Therefore, during the pulse pressure resistance test, the two-axis electric platform 201 and the electric control rotating frame 202 can be periodically controlled to cooperate and move, so that the brake hose 5 is in a straight state, and the second driving member 301 is controlled to align the exhaust port 30602 with the surface of the brake hose 5. Then, the electric control three-way valve on the connecting pipe 307 is controlled to connect the connecting pipe 307 with an external water supply device, and cold water is supplied to the connecting pipe 307 through the external water supply device, so that the cold water is sprayed onto the surface of the brake hose 5 through the exhaust port 30602, simulating the situation where the bent part of the brake hose 5 comes into contact with water after the vehicle passes through a puddle after frequent braking, thereby testing the anti-fatigue performance of the brake hose 5.

[0034] It is also considered that during the frequent braking process of the vehicle, when the tire rolls over a stone, the stone will fly, and there is a situation where the stone flies onto the brake hose 5 and then squeezes the brake hose 5. Since the temperature of the brake hose 5 increases after frequent braking, the elasticity of the brake hose 5 is weakened, and at this time, the anti-extrusion ability of the brake hose 5 decreases. To test the anti-extrusion performance of the brake hose 5 in this situation, as Figure 7 shown, before the test, based on looking from front to back, the rotating rod 403 on one side of the brake hose 5 is manually unfolded so that the rotating rod 403 forms a 90-degree angle with the adjacent blowing plate 306, and the second driving member 301 is controlled to align the center of the cylindrical impact block 40301 of the rotating rod 403 with the brake hose 5. Then, based on looking from top to bottom, the direct drive motor 401 is controlled to drive the corresponding blowing plate 306 and the rotating rod 403 to rotate, so that the cylindrical impact block 40301 quickly impacts the surface of the brake hose 5, simulating the situation where the brake hose 5 is squeezed when the stone flies, thereby detecting the anti-extrusion performance of the brake hose 5 under frequent braking and improving the accuracy and diversity of the test results.

[0035] When the pulse pressure resistance test is completed, at this time, mud adheres to the brake hose 5, the blowing plate 306 and the rotating rod 403. To reduce the cleaning workload, first, the mud is discharged through the liquid outlet on the liquid storage frame 204, and clean water is injected into the liquid storage frame 204. Then, the two-axis electric platform 201 is controlled to drive the brake hose 5 to move downward, and the second driving member 301 is controlled to drive the blowing plate 306 to move downward, so that the brake hose 5, the blowing plate 306 and the rotating rod 403 are immersed in the clean water. In this way, the residual mud on their surfaces is washed clean by the clean water. Then, the blowing plate 306 and the rotating rod 403 are moved upward to the initial position, and then the two-axis electric platform 201 is controlled to drive the fixing frame 2 to move to the initial position, and the electric control rotating frame 202 is controlled to drive the fixing frame 2 to rotate to the initial angle, that is, as Figure 2As shown, the brake fluid in the brake hose 5 is pumped away through the peripheral circulating hydraulic system, and then the first driving member 203 is controlled to move the two pressing plates 3 away from each other, so that the insertion pipe 4 is separated from the corresponding screw joint 5001. Then, the tested brake hose 5 can be quickly taken out, and the installation of the next batch of brake hoses 5 can be carried out.

[0036] Embodiment 2 On the basis of Embodiment 1, with reference to Figures 6-9 As shown, it further includes a micro pump 404, a liquid discharge plate 405, a liquid outlet pipe 406 and a liquid inlet pipe 407; a micro pump 404 is fixedly connected to each air blowing plate 306; a liquid discharge plate 405 is fixedly connected to each air blowing plate 306; the liquid discharge plate 405 is located above the adjacent exhaust port 30602; a liquid discharge groove is formed on the lower side of each liquid discharge plate 405; a liquid outlet pipe 406 is communicated between the liquid discharge groove and the liquid outlet of the adjacent micro pump 404; a liquid inlet pipe 407 is communicated with the liquid inlet of the micro pump 404; the lowest point of the liquid inlet pipe 407 is adjacent to the lowermost side of the air blowing plate 306.

[0037] Furthermore, in order to avoid the abrasion of the air blowing plate 306 under the long-term scouring of mud and sand particles and extend the service life of the air blowing plate 306, the air blowing plate 306 is set to be made of wear-resistant and corrosion-resistant aluminum alloy material.

[0038] It is also considered that when the vehicle is driving on a normal road section, the tires will continuously splash the sand particles on the ground in all directions, so that the brake hose 5 near the tires is easily continuously scoured by the sand particles. Therefore, a certain proportion of sand particles can be configured in the mud, the two-axis electric platform 201 is controlled to drive the brake hose 5 to move above the mud, and the second driving member 301 and the electric slider 304 are controlled to align the exhaust port 30602 with the adjacent brake hose 5. At this time, the liquid inlet pipe 407 is inserted into the mud, and then the micro pump 404 is controlled to start suction, so that the mud passes through the liquid inlet pipe 407, the micro pump 404, and the liquid outlet pipe 406, and finally passes through the liquid discharge groove of the liquid discharge plate 405 and down through the exhaust port 30602. At the same time, the peripheral air supply device is controlled to supply compressed gas to the second cavity 30601, so that the air flow blows from the front of the exhaust port 30602 to the surface of the brake hose 5, so that the mud falling downward is blown to the brake hose 5 by the air flow, and the sand particles in the mud are quickly scoured to the surface of the brake hose 5, so as to simulate the situation that the brake hose 5 is continuously scoured by sand particles during the driving of the vehicle, improve the comprehensiveness and test quality of the pulse withstand voltage test. On this basis, considering that the air blowing plate 306 is also scoured by sand particles while the brake hose 5 is being scoured by sand particles, therefore, by setting the air blowing plate 306 to be made of wear-resistant and corrosion-resistant aluminum alloy material, the service life of the air blowing plate 306 is extended.

[0039] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art from this disclosure that various changes or modifications can be made to the present invention without departing from the principles and spirit of the present invention as defined by the claims. Therefore, the detailed description of the embodiments of this disclosure is only for explanation and not for limiting the present invention, but the scope of protection is defined by the content of the claims.

Claims

1. A performance testing device for an automotive brake hose, comprising a connecting frame (1); characterized in that, It further includes a two-axis electric platform (201), an electric control rotating frame (202), a fixing frame (2), a first driving member (203), a pressing plate (3) and an inserting pipe (4); two two-axis electric platforms (201) are installed on the connecting frame (1); each two-axis electric platform (201) is connected with an electric control rotating frame (202); the two electric control rotating frames (202) are symmetrically arranged; each electric control rotating frame (202) is rotatably connected with a fixing frame (2) for fixing the brake hose (5); several slots (2001) are formed in each fixing frame (2); a limiting groove (2002) for preventing the brake hose (5) from twisting is formed in each fixing frame (2); the limiting groove (2002) communicates with the adjacent slot (2001); the contour dimension of the limiting groove (2002) matches the inside of the screw joint (5001) of the brake hose (5); several first driving members (203) are fixedly connected to each fixing frame (2); the telescopic ends of all the first driving members (203) on the same fixing frame (2) are jointly fixedly connected with a pressing plate (3); a first cavity (3001) is formed in each pressing plate (3); the two first cavities (3001) are respectively connected with the liquid inlet and the liquid outlet of an external circulating hydraulic system; several inserting pipes (4) are fixedly connected to each pressing plate (3), and the inserting pipes (4) are aligned with the adjacent limiting grooves (2002); the inserting pipes (4) are fitted with the inside of the screw joint (5001).

2. The performance testing device for an automotive brake hose according to claim 1, characterized in that, It further includes a liquid storage frame (204); a liquid storage frame (204) for storing slurry is fixedly connected to the middle of the connecting frame (1); the liquid storage frame (204) is located between the two two-axis electric platforms (201); the liquid storage frame (204) is provided with a liquid inlet and a liquid outlet.

3. The performance testing device for an automotive brake hose according to claim 2, characterized in that, It further includes an auxiliary test system; the auxiliary test system includes a driving assembly, a mounting frame (305), a blowing plate (306), a communicating pipe (307) and a corrugated pipe (308); the driving assembly is installed on the connecting frame (1); several mounting frames (305) are connected to the driving assembly; a blowing plate (306) is installed on each mounting frame (305); the communicating pipe (307) is connected to the driving assembly; the communicating pipe (307) is communicated with an external air supply device; a second cavity (30601) is formed in each blowing plate (306); several exhaust ports (30602) for shortening the time required for the slurry to dry are formed in each blowing plate (306), and all the exhaust ports (30602) communicate with the adjacent second cavity (30601); a corrugated pipe (308) is connected between the communicating pipe (307) and each second cavity (30601).

4. The performance testing device for an automotive brake hose according to claim 3, characterized in that, The driving component includes a second driving member (301), a connecting plate (302), a slide rail (303) and an electric slider (304); a plurality of second driving members (301) are fixedly connected to the connecting frame (1); the telescopic ends of all the second driving members (301) are commonly fixedly connected to the connecting plate (302), and the connecting pipe (307) is fixedly connected to the connecting plate (302); the slide rail (303) is fixedly connected to the connecting plate (302); a plurality of electric sliders (304) are slidably connected to the slide rail (303); each electric slider (304) is fixedly connected to the adjacent mounting bracket (305).

5. The performance testing device for an automotive brake hose according to claim 1, wherein A rubber sealing gasket is provided on the insertion pipe (4).

6. The performance testing device for an automotive brake hose according to claim 3, wherein, A rubber valve flap is provided in each exhaust port (30602).

7. The performance testing device for an automotive brake hose according to claim 4, characterized in that, The connecting pipe (307) is connected to an external air supply device through an electric three-way valve; the other port of the electric three-way valve is communicated with an external water supply device.

8. The performance testing device for an automotive brake hose according to claim 4, characterized in that, It further includes a direct drive motor (401), a rotary joint (402) and a rotating rod (403); a direct drive motor (401) is fixedly connected to each mounting bracket (305); the blowing plate (306) is rotatably connected to the mounting bracket (305); the rotating shaft of each blowing plate (306) is fixedly connected to the output end of the adjacent direct drive motor (401); a rotary joint (402) is communicated between each blowing plate (306) and the adjacent corrugated pipe (308); a rotating rod (403) is rotatably connected to each blowing plate (306); a cylindrical impact block (40301) for simulating the impact of stones on the brake hose (5) is clamped on each rotating rod (403), and the cylindrical impact block (40301) is made of stone material.

9. The performance testing device for an automotive brake hose according to claim 8, wherein, It further includes a micro pump (404), a liquid discharge plate (405), a liquid outlet pipe (406) and a liquid inlet pipe (407); a micro pump (404) for sucking mud is fixedly connected to each blowing plate (306); a liquid discharge plate (405) is fixedly connected to each blowing plate (306); the liquid discharge plate (405) is located above the adjacent exhaust port (30602); a liquid discharge groove is opened on the lower side of each liquid discharge plate (405); the liquid discharge groove is communicated with the liquid outlet of the adjacent micro pump (404) through a liquid outlet pipe (406); the liquid inlet of the micro pump (404) is communicated with a liquid inlet pipe (407); the lowest point of the liquid inlet pipe (407) is adjacent to the lowermost side of the blowing plate (306).

10. A performance testing device for an automotive brake hose according to claim 9, characterized in that, The blowing plate (306) is made of wear-resistant and corrosion-resistant aluminum alloy material.

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