A hose flexural fatigue test bench

Abstract

The present invention discloses a hose flexural fatigue test bench, comprising a turntable, a turntable beam, a limit slide and a T-shaped plate arranged in a test box, wherein the turntable beam is fixedly arranged on one side of two turntables; the limit slide is arranged on one side of the turntable, and the T-shaped plate is slidably arranged on the limit slide; a movable air intake joint is arranged on the T-shaped plate through a length fine-tuning joint, and a travel mechanism for driving the T-shaped plate to move linearly is arranged on the limit slide; by arranging the turntable, the turntable beam, the limit slide and the T-shaped plate, and relying on the travel mechanism to drive the T-shaped plate to move linearly on the limit slide to adjust the distance between the T-shaped plate and the turntable beam, an adaptation test of brake hoses of different lengths is realized, and the applicability of the test bench is effectively improved; at the same time, by arranging the length fine-tuning joint, a plurality of brake hoses of different lengths can be tested simultaneously, and the applicability of the test bench is further improved, so that it can meet the simultaneous test of a plurality of brake hoses of different specifications and lengths.

Description

Technical Field

[0001] The invention relates to the technical field of hose flexure testing, in particular to a hose flexure fatigue testing platform. Background Art

[0002] Brake hoses are widely used in brake systems, and the performance of the hoses directly affects the performance of the products they are used in. In particular, brake hoses used in automobile brake systems are components used in automobile brake systems. Their main function is to transfer brake media during automobile braking, ensuring that the braking force is transmitted to the automobile brake shoe or brake caliper to generate braking force, thereby making the brakes timely and effective. Hydraulic brake hoses are mainly used in situations such as cars that require sensitive braking response and high precision.

[0003] The national standard GB16897-1997 specifically regulates various parameters of brake hoses, and particularly emphasizes the importance of hose flexural fatigue and its corresponding test method, that is, after a continuous 35-hour flexural test, the hose assembly must not be damaged. Currently, the equipment used for flexural fatigue testing of brake hoses mainly flexes the brake hose by rotating a turntable, such as a flexural fatigue test method for automobile brake hoses with publication number CN107884293A, which belongs to the field of automobile testing technology. The present invention discloses a flexure fatigue test method for automobile brake hoses, comprising the following steps: a. installing a first automobile brake hose and a second automobile brake hose on a flexure fatigue test device; b. connecting a test medium; c. adjusting the test medium pressure; d. performing flexure movement; e. observing the flexure condition and recording the flexure fatigue test duration of medium leakage; the flexure fatigue test device comprises a workbench, the workbench is fixed with a mounting frame 1 and a mounting frame 2, the mounting frame 1 is provided with a transmission shaft 1 and a transmission shaft 2, the transmission shaft 1 is fixed with an eccentric wheel disc 1, the transmission shaft 2 is fixed with an eccentric wheel disc 2, the eccentric wheel disc 1 and the eccentric wheel disc 2 are fixed with a swivel arm 1 and a swivel arm 2, the swivel arm 1 and the swivel arm 2 are fixed with a test medium transition box 1, and the mounting frame 2 is fixed with a test medium transition box 2.

[0004] The above-mentioned equipment can be used to perform flexural fatigue tests on brake hoses. However, since the equipment cannot be adjusted in length, it can only be used for brake hoses of a specific length and cannot be adapted to brake hoses of various lengths, which reduces its applicability. Therefore, the present application proposes a test equipment suitable for flexural fatigue tests on brake hoses of different lengths. Summary of the invention

[0005] The invention provides a hose flexural fatigue test bench, aiming to solve the problem that the above brake hose flexural fatigue test equipment cannot be adjusted according to the length of the brake hose.

[0006] To achieve the above-mentioned purpose, the present invention provides a hose flexure fatigue test bench, comprising a turntable, a turntable beam, a limit slide and a T-shaped plate arranged in a test box, wherein the turntable beam is fixedly arranged on one side of the two turntables so that the turntable beam can keep a horizontal state and rotate with the turntable; the limit slide is arranged on one side of the turntable, and the T-shaped plate is slidably arranged on the limit slide; it also comprises a plurality of movable air inlet joints for connecting the air inlet end of the hose, the movable air inlet joints are arranged on the T-shaped plate through a length fine-tuning joint, and the turntable beam is provided with a plurality of movable air outlet joints for connecting the air outlet end of the hose; and the limit slide is provided with a travel mechanism for driving the T-shaped plate to move linearly. The turntable is connected to the motor arranged in the test box through a reducer.

[0007] Preferably, the travel mechanism includes a screw, a slider and a rotating component. A test box is provided with a stand, a limit slide is provided on both sides of the stand, a screw is rotatably provided in the middle of the stand, a slider is fixedly provided at the lower end of the T-shaped plate, and the slider is threadedly connected to the screw; the rotating component is connected to the end of the screw. A locking nut for locking the length fine-tuning joint is provided on the T-shaped plate; a pressure sensor is provided on the length fine-tuning joint; and a booster pump is connected to the end of the length fine-tuning joint through a pressure supply hose. An air release valve is provided on the rotating beam, and the air release valve is connected to the movable air outlet joint.

[0008] Preferably, the T-shaped plate includes a first T-shaped plate and a second T-shaped plate, and the slider includes a first slider and a second slider, one end of the first T-shaped plate is slidably connected to one side of the limit slide, and the other end of the first T-shaped plate is fixedly connected to the first slider; one end of the second T-shaped plate is slidably connected to the other side of the limit slide, and the other end of the second T-shaped plate is fixedly connected to the second slider; a screw sleeve is rotatably provided on the first slider and the second slider, and the screw sleeve is threadedly connected to the screw rod; the first slider is provided with a first locking mechanism for limiting the rotation of the screw sleeve, and the second slider is provided with a second locking mechanism for limiting the rotation of the screw sleeve. The first locking mechanism and the second locking mechanism are magnetic locks, which include a lock body and a wire, an iron core, a magnet, a spring and a locking rod arranged in the lock body, the wire is wound around the iron core, the magnet is arranged at the front of the iron core, the locking rod is connected to the magnet, and the spring is sleeved on the locking rod; the outer ring of the screw sleeve is circumferentially provided with a plurality of lock holes plugged with the locking rod. The rotating component is a drive motor, and the output end of the drive motor is connected to one end of the screw rod through a coupling.

[0009] Preferably, a sliding sleeve is slidably sleeved on the outer wall of the lock body, strip-shaped through holes are opened on both sides of the lock body, and the end of the lock rod passes through the strip-shaped through holes and is connected to the sliding sleeve through a connecting protrusion; a push rod is connected to the sliding sleeve, and a locking portion is provided at the end of the push rod, and a plurality of locking grooves are provided at intervals on the inner side of the limit slide, and the lock rod pushes the locking portion at the end of the push rod to engage with the locking groove by contraction. The push rod is slidably provided on the sliding sleeve, and a limit spring is sleeved on the push rod, one end of the limit spring is fixedly connected to the sliding sleeve, and the other end of the limit spring is connected to a fixed clamp on the push rod.

[0010] Compared with the prior art, it has the following beneficial effects:

[0011] The present invention discloses a hose flexural fatigue test bench, which realizes adaptation test of brake hoses of different lengths by arranging a turntable, a turntable beam, a limit slide and a T-plate, and relies on a traveling mechanism to drive the T-plate to perform linear motion on the limit slide to adjust the distance between the T-plate and the turntable beam, thereby realizing adaptation test of brake hoses of different lengths and effectively improving the applicability of the test bench; at the same time, by arranging a length fine-tuning joint, it is possible to realize simultaneous test of multiple brake hoses of different lengths, further improving the applicability of the test bench, so that it can meet the simultaneous test of multiple brake hoses of different specifications and lengths; in addition, the present application also arranges a first slider and a second slider that can work separately, so that a first locking mechanism and a second locking mechanism can respectively control the rotational freedom of the screw sleeves on the first slider and the second slider, so that the screw can drive the first slider and the second slider separately and simultaneously to drive the first T-plate and the second T-plate to perform linear motion, thereby realizing simultaneous flexural fatigue test of multiple brake hoses of different specifications with large length differences. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 A schematic diagram of a hose flexure fatigue test bench for this application;

[0014] Figure 2 For this application Figure 1 A local enlarged schematic diagram;

[0015] Figure 3 This is a schematic diagram of the travel mechanism and two T-shaped plates of the present application;

[0016] Figure 4 This is a schematic diagram of the travel mechanism and two T-shaped plates of the present application;

[0017] Figure 5 For this application Figure 2 B is a partial enlarged schematic diagram;

[0018] Figure 6 This is a schematic diagram of the bottom of the bench for this application;

[0019] Figure 7 For this application Figure 3 A local enlarged schematic diagram of C;

[0020] Figure 8This is a schematic diagram of the locking mechanism and the screw sleeve for this application.

[0021] Figure markings: 1-turntable; 2-turn beam; 3-limit slide; 4-T-shaped plate; 5-movable air inlet joint; 6-length fine-adjustment joint; 7-movable air outlet joint; 8-travel mechanism; 9-stand; 10-locking nut; 11-pressure sensor; 12-air relief valve; 31-locking groove; 41-first T-shaped plate; 42-second T-shaped plate; 81-screw; 82-slider; 83-rotating component; 821-first slider; 822-second slider; 823-screw sleeve; 8201-lock body; 8202-wire; 8203-iron core; 8204-magnet; 8205-spring; 8206-lock rod; 8207-sliding sleeve; 8208-strip through hole; 8209-push rod; 8210-locking part; 8211-limit spring; 8231-lock hole. DETAILED DESCRIPTION

[0022] In order to make it easier to understand the structure of the present invention and the functional features and advantages that can be achieved, the preferred embodiments of the present invention are described in detail with reference to the drawings as follows:

[0023] Example:

[0024] like Figure 1 and Figure 2 As shown, the present invention provides a hose flexural fatigue test bench, comprising a test box and a turntable 1, a turntable beam 2, a limit slide 3 and a T-shaped plate 4 arranged in the test box, the turntable beam 2 is fixedly arranged on one side of the two turntables 1, so that the turntable beam 2 maintains a horizontal state and rotates with the turntable 1; the limit slide 3 is arranged on one side of the turntable 1, and the T-shaped plate 4 is slidably arranged on the limit slide 3; it also includes a plurality of movable air inlet joints 5 for connecting the air inlet end of the hose, and the movable air inlet joint 5 is arranged on the T-shaped plate 4 through a length fine-tuning joint 6; further, the movable air inlet joint 5 is divided into two specifications of external thread and internal thread, and the tightening nut at the tail of the joint is loosened, and the joint can be rotated along the axis, and the movable air inlet joint 5 can be replaced if the nut is removed; the turntable beam 2 is provided with a plurality of movable air outlet joints 7 for connecting the air outlet end of the hose; the limit slide 3 is provided with a traveling mechanism 8 for driving the T-shaped plate 4 to move linearly. The turntable 1 is connected to the motor in the test box through a reducer, so that the motor controls the synchronous rotation of the two turntables 1, thereby driving the rotating beam 2 to rotate horizontally on the turntable 1.

[0025] As another embodiment of the present application, Figure 1As shown, the travel mechanism 8 of the present application includes a screw 81, a slider 82 and a rotating component 83. A stand 9 is provided in the test box, and the limit slide 3 is provided on both sides of the stand 9. The screw 81 is rotatably provided in the middle of the stand 9, and the slider 82 is fixedly provided at the lower end of the T-shaped plate 4. The slider 82 is threadedly connected to the screw 81; the rotating component 83 is connected to the end of the screw 81 so as to rotate the screw 81 by the rotating component 83. The rotating component 83 can be a manual turning handle so as to adjust the distance between the T-shaped plate 4 and the rotating beam 2 by manually rotating the manual turning handle.

[0026] like Figure 2 As shown, a locking nut 10 for locking the length fine-tuning joint 6 is provided on the T-shaped plate 4; when the lengths of multiple hoses to be tested are different, they can be adjusted through this joint, and the locking nuts 10 on both sides of the joint can be loosened to adjust the joint forward or backward, and the adjustment distance is 40-55mm. A pressure sensor 11 is provided on the length fine-tuning joint 6 to monitor the pressure in the brake hose through the pressure sensor 11; the end of the length fine-tuning joint 6 is connected to a booster pump through a pressure supply hose to add a certain pressure of gas and liquid into the brake hose through the booster pump. A relief valve 12 is provided on the rotating beam 2, and the relief valve 12 is connected to the movable air outlet joint 7 to release the pressure in the brake hose through the relief valve 12.

[0027] As another embodiment of the present application, Figures 3 to 8 As shown, the T-shaped plate 4 of the present application includes a first T-shaped plate 41 and a second T-shaped plate 42, and the slider 82 includes a first slider 821 and a second slider 822. One end of the first T-shaped plate 41 is slidably connected to one side of the limiting slide 3, and the other end of the first T-shaped plate 41 is fixedly connected to the first slider 821; one end of the second T-shaped plate 42 is slidably connected to the other side of the limiting slide 3, and the other end of the second T-shaped plate 42 is fixedly connected to the second slider 822; a screw sleeve 823 is rotatably provided on the first slider 821 and the second slider 822, and the screw sleeve 823 is threadedly connected to the screw rod 81; the first slider 821 is provided with a first locking mechanism for limiting the rotation of the screw sleeve 823, and the second slider 822 is provided with a second locking mechanism for limiting the rotation of the screw sleeve 823, so that the first T-shaped plate 41 and the second T-shaped plate 42 can be individually controlled to move linearly by setting the first locking mechanism and the second locking mechanism, so that they can perform individual and synchronous linear motion when the screw rod 81 rotates.

[0028] like Figure 5 and Figure 8As shown, the first locking mechanism and the second locking mechanism are magnetic locks, which include a lock body 8201 and a wire 8202, an iron core 8203, a magnet 8204, a spring 8205 and a locking rod 8206 arranged in the lock body 8201, the wire 8202 is wound around the iron core 8203, the magnet 8204 is arranged at the front of the iron core 8203, the locking rod 8206 is connected to the magnet 8204, and the spring 8205 is sleeved on the locking rod 8206; the outer ring of the screw sleeve 823 is circumferentially provided with a plurality of lock holes 8231 that are plugged into the locking rod 8206. When the wire 8202 is powered, the iron core 8203 is magnetically attracted to the magnet 8204, so that the locking rod 8206 stretches the spring 8205 or compresses the spring 8205 to shrink, thereby disengaging the locking rod 8206 from the locking hole 8231 to release the rotational freedom of the screw sleeve 823, so that it can rotate on the first slider 821 and the second slider 822 by means of the bearing. When the wire 8202 is powered off, the iron core 8203 is demagnetized, so that the locking rod 8206 returns to its original position under the action of the spring 8205 to be plugged into the locking hole 8231 on the screw sleeve 823, so as to lock the screw sleeve 823 to the first slider 821 and the second slider 822. By setting a magnetic lock, the first slider 821 and the second slider 822 can be operated separately or simultaneously to achieve adaptation to brake hoses of different lengths; further, when the screw sleeve 823 on the first slider 821 is locked and the screw sleeve 823 on the second slider 822 is unlocked, the screw 81 rotates to drive the first T-shaped plate 41 to move linearly; on the contrary, when the screw sleeve 823 on the first slider 821 is unlocked and the screw sleeve 823 on the second slider 822 is locked, the screw 81 rotates to drive the second T-shaped plate 42 to move linearly; when the screw sleeves 823 on the first slider 821 and the second slider 822 are both locked with them, the screw 81 rotates to synchronously drive the first T-shaped plate 41 and the second T-shaped plate 42 to move linearly together.

[0029] like Figure 3 As shown, the rotating component 83 is a driving motor, and the output end of the driving motor is connected to one end of the screw 81 through a coupling to control the rotation of the screw 81 through the driving motor; further, it also includes a control system for controlling the operation of the driving motor and the turntable 1 as well as the booster pump and the pressure control valve group, so as to improve the degree of automation of the test and the accuracy of the test by setting up the control system.

[0030] As another embodiment of the present application, Figures 3 to 8As shown, a sliding sleeve 8207 is slidably sleeved on the outer wall of the lock body 8201 of the present application, and strip-shaped through holes 8208 are opened on both sides of the lock body 8201. The ends of the locking rod 8206 pass through the strip-shaped through holes 8208 and are connected to the sliding sleeve 8207 via connecting protrusions; a push rod 8209 is connected to the sliding sleeve 8207, and a locking portion 8210 is provided at the end of the push rod 8209. A plurality of locking grooves 31 are provided at intervals on the inner side of the limiting slide 3. The locking rod 8206 pushes the locking portion 8210 at the end of the push rod 8209 to engage with the locking groove 31 by contraction, so that when the locking rod 8206 is disengaged from the screw sleeve 823, the first T-shaped plate 41 or the second T-shaped plate 42 can be locked, so that when the screw rod 81 is rotated, the unlocked screw sleeve 823 can rotate in the first T-shaped plate 41 or the second T-shaped plate 42.

[0031] The push rod 8209 is slidably provided on the sliding sleeve 8207, and the push rod 8209 is sleeved with a limit spring 8211, one end of the limit spring 8211 is fixedly connected to the sliding sleeve 8207, and the other end of the limit spring 8211 is connected to the fixed clamping ring on the push rod 8209. By setting the limit spring 8211, the push rod 8209 can be elastic, so that when the locking rod 8206 is contracted, the push rod 8209 can push the locking part 8210 to be elastically plugged into the locking groove 31; after the wire 8202 is powered off, The demagnetization of the iron core 8203 causes the locking rod 8206 to extend back under the action of the spring 8205, thereby driving the sliding sleeve 8207 to pull the push rod 8209 to disengage the locking portion 8210 from the locking groove 31. At this time, the locking rod 8206 is plugged into the locking hole 8231 on the screw sleeve 823, so that the screw sleeve 823 is locked on the first slider 821 and the second slider 822, so that when the screw rod 81 rotates, the first slider 821 and the second slider 822 can drive the first T-shaped plate 41 and the second T-shaped plate 42 to move.

[0032] The working principle of the present application is as follows: the two ends of the brake hose are respectively connected to the movable air inlet joint 5 and the movable air outlet joint 7, and the rotating component 83 drives the screw 81 to rotate to make the T-shaped plate 4 move linearly on the limit slide 3 to adjust the horizontal distance between it and the rotating beam 2 to adapt the length of the brake hose, and then the locking nuts 10 on both sides of the T-shaped plate 4 are rotated to adjust the elongation of the length fine-tuning joint 6, so as to achieve fine-tuning of the tension or curvature of the brake hose; the rotation of the turntable 1 drives the rotating beam 2 to rotate horizontally, so that the rotating beam 2 drives the brake hose to perform a flexural fatigue test; during this process, the air booster pump injects a certain pressure of gas or gas-liquid into the brake hose through the pressure supply hose.

[0033] The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the above technical content without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments based on the technology of the present invention without departing from the content of the technical solution of the present invention belong to the protection scope of the present technical solution.

Claims

1. A hose flexural fatigue test bench, characterized in that: The test box comprises a turntable (1), a turntable beam (2), a limit slide (3) and a T-shaped plate (4), wherein the turntable beam (2) is fixedly arranged on one side of the two turntables (1) so that the turntable beam (2) remains in a horizontal state and rotates along with the turntable (1); the limit slide (3) is arranged on one side of the turntable (1), and the T-shaped plate (4) is slidably arranged on the limit slide (3); and the test box further comprises a plurality of movable air inlet joints (5) for connecting to the air inlet end of a hose, wherein the movable air inlet joints (5) are arranged on the T-shaped plate (4) via a length fine-tuning joint (6); the turntable beam (2) is provided with a plurality of movable air outlet joints (7) for connecting to the air outlet end of the hose; and the limit slide (3) is provided with a travel mechanism (8) for driving the T-shaped plate (4) to move linearly. The travel mechanism (8) comprises a screw rod (81), a slider (82) and a rotating component (83); a stand (9) is provided in the test box; the limit slide (3) is provided on both sides of the stand (9); the screw rod (81) is rotatably provided in the middle of the stand (9); the slider (82) is fixedly provided at the lower end of the T-shaped plate (4); the slider (82) is threadedly connected to the screw rod (81); and the rotating component (83) is connected to the end of the screw rod (81); The T-shaped plate (4) comprises a first T-shaped plate (41) and a second T-shaped plate (42); the slider (82) comprises a first slider (821) and a second slider (822); one end of the first T-shaped plate (41) is slidably connected to one side of the position-limiting slide (3), and the other end of the first T-shaped plate (41) is fixedly connected to the first slider (821); one end of the second T-shaped plate (42) is slidably connected to the other side of the position-limiting slide (3), and the other end of the second T-shaped plate (42) is fixedly connected to the second slider (822); screw sleeves (823) are rotatably provided on the first slider (821) and the second slider (822), and the screw sleeves (823) are threadedly connected to the screw rod (81); the first slider (821) is provided with a first locking mechanism for limiting the rotation of the screw sleeve (823), and the second slider (822) is provided with a second locking mechanism for limiting the rotation of the screw sleeve (823); The first locking mechanism and the second locking mechanism are magnetic locks, which include a lock body (8201) and a wire (8202), an iron core (8203), a magnet (8204), a spring (8205) and a locking rod (8206) arranged in the lock body (8201), the wire (8202) is wound around the iron core (8203), the magnet (8204) is arranged at the front of the iron core (8203), the locking rod (8206) is connected to the magnet (8204), and the spring (8205) is sleeved on the locking rod (8206); the outer ring of the screw sleeve (823) is circumferentially provided with a plurality of locking holes (8231) plugged into the locking rod (8206).

2. The hose flexure fatigue test bench according to claim 1, characterized in that: The T-shaped plate (4) is provided with a locking nut (10) for locking the length fine-adjusting joint (6); the length fine-adjusting joint (6) is provided with a pressure sensor (11); and the end of the length fine-adjusting joint (6) is connected to a booster pump via a pressure supply hose.

3. The hose flexure fatigue test bench according to claim 2, characterized in that: The rotating beam (2) is provided with an air release valve (12), and the air release valve (12) is in communication with the movable air outlet joint (7).

4. The hose flexure fatigue test bench according to claim 1, characterized in that: The rotating component (83) is a driving motor, and the output end of the driving motor is connected to one end of the screw rod (81) via a coupling.

5. The hose flexure fatigue test bench according to claim 4, characterized in that: A sliding sleeve (8207) is slidably sleeved on the outer wall of the lock body (8201), and strip-shaped through holes (8208) are provided on both sides of the lock body (8201). The end of the locking rod (8206) passes through the strip-shaped through holes (8208) via a connecting protrusion and is connected to the sliding sleeve (8207); a push rod (8209) is connected to the sliding sleeve (8207), and a locking portion (8210) is provided at the end of the push rod (8209). A plurality of locking grooves (31) are provided at intervals on the inner side of the limiting slide (3), and the locking rod (8206) pushes the locking portion (8210) at the end of the push rod (8209) to be plugged into the locking groove (31) by contraction.

6. The hose flexure fatigue test bench according to claim 5, characterized in that: The push rod (8209) is slidably arranged on the sliding sleeve (8207), and a limit spring (8211) is sleeved on the push rod (8209), one end of the limit spring (8211) is fixedly connected to the sliding sleeve (8207), and the other end of the limit spring (8211) is connected to a fixed clamping ring on the push rod (8209).

7. The hose flexure fatigue test bench according to claim 1, characterized in that: The turntable (1) is transmission-connected to a motor disposed in the test box via a reducer.

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