CN108168873B - Distance rod endurance test bed - Google Patents

Abstract

The thrust rod durability test bench of the present invention comprises support A, support B, axial test device, deflection test device and torsion test device; The torsional displacement sensor on the board and the torsional force sensor for measuring the torsional force of the thrust rod; the axial experimental device includes an axial loading cylinder, an axial loading cylinder mounting plate, an axial displacement sensor for measuring the axial displacement of the thrust rod, and a measuring shaft Axial force sensor of the magnitude of the axial loading force to the loading oil cylinder; the deflection test device comprises two connecting rods, deflection cylinder, deflection displacement sensor and deflection force sensor for measuring thrust rod deflection displacement; test bench of the present invention The thrust rod can be rotated, deflected, and axially moved in a single or arbitrary combination. It is easy to install the thrust rod and can quickly and efficiently test the performance of the thrust rod.

Description

Thrust Rod Durability Test Rig

technical field

The invention belongs to the technical field of auto parts test equipment, and more specifically relates to a durability test equipment for thrust rods of heavy vehicles

Background technique

As one of the existing means of transportation, automobiles bring a lot of convenience to human travel, but the traffic accidents caused by them also bring great threats and injuries to human life and property. Therefore, the safety performance of automobiles has become a topic of great concern to automobile manufacturers, consumers, and government departments. Heavy-duty vehicles are mainly used for commercial hauling, logistics, etc. When heavy-duty vehicles are driving on uneven roads or when the car is turning, the middle and rear axles will have left-right displacement problems, which will cause friction between the leaf spring and the tires, and in severe cases will cause tire wear or even rupture. The reason why the thrust rod plays an important role in the chassis suspension of heavy trucks is that on the one hand, it plays the role of transmitting traction force, braking force and its reaction moment, and on the other hand, it also realizes the positioning of the frame and axle to ensure Safety and stability of vehicle driving. Therefore, the durability test of the thrust rod is particularly important. 1. At present, the manufacturer can only conduct force tests in one direction on the thrust rod, which cannot reflect the force state of the thrust rod in all directions when the vehicle is running; It is easy to break the fixture, which has potential safety hazards;

Contents of the invention

The technical problem to be solved by the present invention is to provide a thrust rod durability that enables the thrust rod to perform single or arbitrary combined movements in the three directions of torsion, yaw, and axial direction, facilitates the installation of the thrust rod, and can quickly and efficiently test the performance of the thrust rod Test Bench.

To solve the technical problems described above, the technical solution adopted by the present invention is:

The thrust rod durability test bench includes support A, support B, axial test device, deflection test device and torsion test device; the torsion test device includes a torsion lifting plate, a torsion oil cylinder, The torsional displacement sensor and the torsional force sensor for measuring the torsional force on the thrust rod; the axial test device includes an axial loading cylinder, an axial loading cylinder mounting plate, an axial displacement sensor for measuring the axial displacement of the thrust rod, and a measuring Axial force sensor for the axial loading force of the axial loading cylinder; the deflection test device includes two connecting rods, a deflection cylinder, a deflection displacement sensor for measuring the deflection displacement of the thrust rod, and a deflection cylinder for measuring the deflection load The yaw force sensor of the force size; the yaw support seat is provided on the support A; the track A for sliding the yaw support seat left and right is provided on the left and right direction of the support A, and the yaw support seat is set in the front and rear direction Track B on which the axially loaded cylinder mounting plate slides back and forth;

The support A and the support B are set correspondingly front and back; the support B is vertically provided with a guide rail, and the torsion force lifting plate is slidably arranged on the guide rail, and the top end of the telescopic rod of the torsion oil cylinder passes through the torsion force sensor Connected with the torsion lifting plate, the lifting plate is driven to slide vertically on the guide rail through the torsion cylinder to form the twist of the thrust rod;

The torsional force lifting plate is installed on the support B and connected by guide rails. Due to the force closed loop, the support B and the guide rail are not stressed, and the guide rail only serves as a guide for vertical up and down movement, which is safe and reliable.

The axial loading oil cylinder mounting plate is opposite to the torsional force lifting plate, and the axial loading oil cylinder is fixedly arranged on the axial loading oil cylinder mounting plate; the thrust rod is clamped and fixed on the axial loading oil cylinder mounting plate and the torsional force lifting plate. Between the plates, one end of it is connected to the torsion force lifting plate, and the other end is set opposite to the top end of the telescopic rod of the axial loading cylinder through the axial force sensor;

The two connecting rods are arranged on both sides of the thrust rod in parallel with the thrust rod. The power lifting plate and the axial loading oil cylinder mounting plate form a force-closed parallelogram; the telescopic rod of the yaw oil cylinder is connected with the yaw support seat, and the yaw oil cylinder drives the yaw support seat to move left and right to drive the axial load The oil cylinder mounting plate slides left and right to form the thrust rod yaw; the yaw displacement sensor is arranged on one side of the track A, and the yaw force sensor is arranged between the end of the yaw cylinder telescopic rod and the yaw support seat.

The axial loading oil cylinder is installed on the mounting plate of the axial loading oil cylinder, and the mounting plate of the axial loading oil cylinder is installed on the track B, and can move forward and backward along the track B; the yaw support seat is installed on the track A, and can slide left and right; when twisted When the lifting plate moves up and down, the connecting rods and thrust rods on both sides tilt up and down to form a certain angle with the vertical direction. At this time, the projection of the thrust rod in the horizontal direction becomes shorter. At this time, the axial loading cylinder mounting plate can move forward and backward along the track B movement to compensate for the shortening of its projection. When the telescopic rod of the yaw oil cylinder drives the yaw support seat to move left and right along the track A, the connecting rods and thrust rods on both sides form a certain angle with the current position on the horizontal plane. At this time, the projection of the thrust rod in the horizontal direction becomes shorter. At this time, the axial The loading cylinder mounting plate can move back and forth along track B to compensate for the shortening of its projection. When the yaw and torsion move at the same time, in order to compensate for the shortening of the horizontal projection of the thrust rod, the mounting plate of the axially loaded oil cylinder moves back and forth along the track B; The oil cylinder mounting plate is installed on the yaw support seat through the track B and also yaws left and right together, so the actual movement of the axially loaded oil cylinder mounting plate is: move forward and backward along the track A, and move left and right together with the yaw support seat; A compound movement process.

The connecting rod adopts a double universal joint structure, which can swing while bearing the axial loading force, so the deflection and torsion tests can be carried out at the same time when the axial loading is carried out without affecting each other; after adjusting the length of the connecting rod , put the thrust rod between fixture A and fixture B and lock the screws, the installation is convenient and quick.

The axial loading cylinder is set on the mounting plate of the axial loading cylinder, and the bottom of the mounting plate of the axial loading cylinder is supported by a linear track B. When the yaw and torsional movement occurs, the projection of the thrust rod in the horizontal direction becomes shorter, and this track only bears the shaft The gravity of the loading cylinder mounting plate and the guiding effect of the forward and backward movement of the axial loading cylinder mounting plate.

Further, the clamp includes a clamp A and a clamp B for clamping the thrust rod; the clamp A is arranged at the end of the extension rod of the axially loaded oil cylinder, and the clamp B is arranged in the middle of the torsion lifting plate; the thrust rod One end of it is fixedly connected with the torsion lifting plate through the clamp B; the other end is fixedly connected with the end of the telescopic rod of the axially loaded oil cylinder through the clamp A.

Furthermore, the thrust rod is H-shaped, and its two ends are respectively provided with mounting holes, and the corresponding fixtures are provided with threaded holes corresponding to the mounting holes, and the screws are locked with the corresponding mounting holes and threaded holes on the thrust rod so that achieve mutual fixation.

Further, the torsion oil cylinder is vertically fixed on the support B, and its telescopic rod is vertically set downward.

Further, there are two guide rails arranged on the support B.

Further, the support B is an L-shaped support.

Further, the connecting rod is connected through an adjustable screw thread.

Further, the support A and the support B are arranged on the workbench.

Furthermore, it also includes a push-pull device; the push-pull device is connected to the support B to adjust the distance between the support A and the support B; the workbench is provided with a sliding groove for the support B to slide along the front and rear directions.

The hydraulic servo system is used to act on the thrust rod, and the oil cylinder is used as the actuator. In order not to cause the system to generate force externally, this patent adopts a force-closed form to act on the thrust rod; the axial loading force transmission path is: axial loading oil cylinder movement Force is applied to the thrust rod, and at the same time the force on the thrust rod is transmitted to the torsional force lifting plate, which in turn transmits the force to the connecting rods at both ends, and the connecting rods at both ends are transmitted back to the mounting plate of the axially loaded cylinder And get back on the axially loaded oil cylinder, thus forming a force-closed mode. When deflecting or twisting, due to the parallelogram structure, the axially loaded oil cylinder will not expand and contract with the deflecting and twisting. At the same time, since the axial loading force is an internal force, the axial loading force will not produce any component force on the movement direction of the yaw cylinder and the torsion cylinder when there is a yaw angle or a torsion angle. The yaw and torsion oil cylinder only bears the friction force of each joint, the deformation force of the thrust rod, the inertia force and the gravity of the moving parts.

The vertical movement of the torsion force lifting plate produces a twist on the thrust rod, the left and right movement of the axial loading cylinder produces deflection on the thrust rod, and the axial loading cylinder loads the thrust rod; force and displacement sensors are installed in these three directions, three The magnitude of force and displacement during directional movement can be set and monitored; once the set value is exceeded, it will stop running immediately to ensure safety.

Adopt technical scheme of the present invention, can obtain following remarkable effect:

1) The thrust rod test equipment of the present invention only needs the thrust rod itself to carry out the test, does not need to be installed on a real vehicle, and has a simple structure, does not require complicated mechanical structures, and can be as close as possible to the situation when the real vehicle is running .

2) The present invention can act on the three directions of the thrust rod arbitrarily, which can meet the compound movement of the real vehicle, and can also conduct a single-direction test, which can cover the test of this product by other equipment.

Description of drawings

The following is a brief description of the contents expressed in the drawings of this manual and the marks in the drawings:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a structural representation of the present invention;

Fig. 3 is the enlarged view of place A in Fig. 2;

Among them: 1. Support A; 2. Support B; 31. Torsion lifting plate; 32. Torsion cylinder; 33. Torsion displacement sensor; 34. Torsion sensor; 35. Guide rail; 41. Axial loading cylinder; 42 , Axial load cylinder mounting plate; 43, Axial displacement sensor; 44, Axial force sensor; 51, Connecting rod; 52, Yaw cylinder; 53, Yaw displacement sensor; 54, Yaw force sensor; 61, Fixture A; 62. Fixture B; 7. Thrust rod; 8. Workbench; 81. Slide groove; 9. Push-pull device; 10. Sway support seat; 11. Track A;

Detailed ways

The present invention will be further elaborated below by providing some non-limiting embodiments in conjunction with the accompanying drawings. It should be understood, however, that these descriptions are exemplary only, and are not intended to limit the scope of the invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

As shown in Figures 1, 2, and 3, the thrust rod 7 durability test bench includes a support A1, a support B2, an axial test device, a deflection test device, and a torsion test device; the torsion test device includes a torsional lift Plate 31, torsion oil cylinder 32, torsional displacement sensor 33 arranged on the torsional force lifting plate 31, and torsional force sensor 34 for measuring the torsional force that the thrust rod 7 bears; the axial test device includes an axial loading oil cylinder 41, an axial The loading cylinder mounting plate 42, the axial displacement sensor 43 for measuring the axial displacement of the thrust rod 7, and the axial force sensor 44 for measuring the axial loading force of the axial loading cylinder 41; the deflection test device includes two connecting rods 51 , the yaw cylinder 52, the yaw displacement sensor 53 for measuring the yaw displacement of the thrust rod 7, and the yaw force sensor 54 for measuring the yaw loading force of the yaw cylinder 52; as shown in Figure 3, the bearing A1 is set There is a yaw support seat 10; on the left and right direction of the support A1, there is a track A11 on which the yaw support seat 10 slides left and right, and on the front and back direction of the yaw support seat 10, an axially loaded oil cylinder mounting plate 42 is arranged on it. sliding track B12;

The support A1 and the support B2 are set correspondingly front and back; the support B2 is vertically provided with a guide rail 35, the torsion lifting plate 31 is slidably arranged on the guide rail 35, and the top end of the telescopic rod of the torsion oil cylinder 32 The torsional force sensor 34 is connected to the torsional lifting plate 31, and the torsion cylinder 32 drives the lifting plate to slide vertically on the guide rail 35 to form the twist of the thrust rod 7;

The axial loading oil cylinder mounting plate 42 is opposite to the torsional lifting plate 31, and the axial loading oil cylinder 41 is fixedly arranged on the axial loading oil cylinder mounting plate 42; the thrust rod 7 is clamped and fixed on the axial loading oil cylinder for installation. Between the plate 42 and the torsional force lifting plate 31, one end thereof is connected with the torsional force lifting plate 31, and the other end is set opposite to the top end of the telescoping rod of the axial loading oil cylinder 41 through the axial force sensor 44;

As shown in Figures 2 and 3, the two connecting rods 51 are arranged on both sides of the thrust rod 7 in parallel with the thrust rod 7. Connected to the loading cylinder mounting plate 42, two connecting rods 51, the torsional lifting plate 31 and the axial loading cylinder mounting plate 42 form a force-closed parallelogram; , through the yaw oil cylinder 52 to drive the yaw support seat 10 to move left and right so as to drive the axially loaded oil cylinder mounting plate 42 to slide left and right to form the thrust rod 7 to yaw; the yaw displacement sensor 53 is arranged on one side of the track A11, so The yaw force sensor 54 is arranged between the end of the telescopic rod of the yaw cylinder 52 and the yaw support base 10 .

As shown in Figure 1, the clamp includes a clamp A61 and a clamp B62 for clamping the thrust rod 7; the clamp A61 is arranged at the end of the extension rod of the axially loaded cylinder 41, and the clamp B62 is arranged at the end of the torsional lift The middle part of the plate 31; one end of the thrust rod 7 is fixedly connected with the torsion lifting plate through the clamp B62; the other end is fixedly connected with the end of the telescopic rod of the axial loading cylinder 41 through the clamp A61. The thrust rod 7 is H-shaped, and its two ends are respectively provided with mounting holes, and the corresponding fixture is provided with threaded holes corresponding to the mounting holes, and the screws are locked with the corresponding mounting holes and threaded holes on the thrust rod 7 to achieve Fixed to each other, the torsion oil cylinder 32 is vertically fixed on the support B2, and its telescopic rod is vertically set downward. There are two guide rails 35 arranged on the support B2. The support B2 is an L-shaped support. The connecting rod 51 is connected through an adjustable screw thread. The support A1 and the support B2 are arranged on the workbench 8 .

It also includes a push-pull device 9; the push-pull device 9 is connected to the support B2 to adjust the distance between the support A1 and the support B2; the workbench 8 is provided with a sliding groove 81 in which the support B2 can slide along the front and rear directions.

The thrust rod 7 durability test bench of the present invention, the equipment is in a force-closed state during the test, and simultaneous tests in three different states can be carried out at the same time; the clamping of the thrust rod 7 is exactly the same as the assembly method of the real vehicle, and the assembly is simple. The corresponding screw holes can be loaded with screws; the durability tests in three directions can be carried out independently or simultaneously, and can also be combined to run in pairs; the two ends of the connecting rod 51 forming a force closed loop adopt universal The method can not only swing, but also bear axial force while swinging; each direction of movement is monitored by force and displacement sensors, which can control displacement or force; the connecting rods 51 on both sides are threaded and can be adjusted Thread, changing the length of connecting rod 51 to meet the installation of thrust rod 7 with different lengths within a certain range; axial loading cylinder 41 is installed on an axial loading cylinder mounting plate 42 that can move back and forth , the projection in the horizontal direction is shortened, and the axially loaded oil cylinder mounting plate 42 can move back and forth for displacement compensation. The movement of the whole mechanism is driven by hydraulic cylinder.

Principle of the present invention is:

After turning on the oil pump and entering the program, raise the torsional lifting plate 31 to be equal to the height of the center of the axially loaded oil cylinder mounting plate 42, and then adjust the axially loaded oil cylinder mounting plate 42 to be opposite to the center of the support B2. Adjust the length of the connecting rod 51 so that the distance between the bearing B2 and the mounting plate 42 of the axial loading cylinder is appropriate, so that the thrust rod 7 can be placed between the clamps normally. After the connecting rod 51 is installed, adjust the yaw cylinder 52 and the torsion cylinder 32 to Connecting rod 51 keeps horizontal state as far as possible, then thrust rod 7 is packed into and locked and can carry out test.

The above embodiments should be understood as only for illustrating the utility model but not for limiting the protection scope of the utility model. After reading the content recorded in the utility model, the skilled person can make various changes or modifications to the utility model, and these equivalent changes and modifications also fall within the scope limited by the patent requirements of the utility model.

Claims (9)

1. distance rod endurance test bed, which is characterized in that including support A, support B, axial test device, beat experimental rig And crane torsion test device；

The crane torsion test device includes twisting resistance lifter plate, reverses oil cylinder, the torsional displacement being arranged on twisting resistance lifter plate Sensor and measurement distance rod bear the torsion force snesor of twisting resistance size；

The axial test device includes axially loaded oil cylinder, axially loaded oil cylinder mounting plate, measurement distance rod axial displacement Shaft position sensor and the axial force transducer for measuring the axially loaded axially loaded power size of oil cylinder；

The beat experimental rig includes two connecting rods, beat oil cylinder, the beat displacement sensor for measuring the displacement of distance rod beat With the beat force snesor of measurement beat oil cylinder beat loading force size；

Beat support base is provided on the support A；It is provided with what beat support base horizontally slipped on the left and right directions of support A Track A is provided with the track B that axially loaded oil cylinder mounting plate slides back and forth on it on beat support base front-rear direction；

The support A and support B correspondence are arranged；Guide rail is vertically arranged on the support B, the twisting resistance lifter plate is sliding Dynamic to be arranged on guide rail, the top of the telescopic rod of the torsion oil cylinder is connect by reversing force snesor with twisting resistance lifter plate, By torsion oil cylinder drive lifter plate on guide rail vertical sliding to forming thrust torsion of bar；

The axially loaded oil cylinder mounting plate is opposite with twisting resistance lifter plate, and the axially loaded oil cylinder is fixed at axial add It carries on oil cylinder mounting plate；The distance rod is clamped between axially loaded oil cylinder mounting plate and twisting resistance lifter plate, one End is connected with twisting resistance lifter plate, and the other end is set by the way that axial force transducer is opposite with the top of axially loaded oil cylinder telescopic rod It sets；

Two connecting rods and distance rod are arranged in parallel in the two sides of distance rod, the both ends of the connecting rod pass through respectively universal joint with Twisting resistance lifter plate is connected with axially loaded oil cylinder mounting plate, two connecting rods, twisting resistance lifter plate and the installation of axially loaded oil cylinder Plate forms force-closed parallelogram；The telescopic rod of the beat oil cylinder is connect with beat support base, passes through beat oil cylinder band The beat support base side-to-side movement is moved to drive axially loaded oil cylinder mounting plate to horizontally slip to form distance rod beat；It is described Beat displacement sensor is arranged in the side of track A, the beat force snesor be arranged in the end of beat oil cylinder telescopic rod with Between beat support base.

2. distance rod endurance test bed as described in claim 1, which is characterized in that fixture includes the fixture for clamping distance rod A and fixture B；The end that axially loaded oil cylinder telescopic rod stretches out is arranged in the fixture A, and the fixture B is arranged in twisting resistance liter The middle part of plate drops；One end of the distance rod is fixedly connected by fixture B with torsion lifter plate；Its other end by fixture A with The end of axially loaded oil cylinder telescopic rod is fixedly connected.

3. distance rod endurance test bed as claimed in claim 2, which is characterized in that the distance rod is H-type, both ends point Be not provided with mounting hole, be provided with threaded hole corresponding with mounting hole on corresponding fixture, by screw with it is mutual right on distance rod The mounting hole answered locks to realize and be fixed to each other with threaded hole.

4. distance rod endurance test bed as described in claim 1, which is characterized in that the torsion oil cylinder is fixed on branch vertically On seat B, telescopic rod is arranged straight down.

5. distance rod endurance test bed as described in claim 1, which is characterized in that the guide rail being arranged on support B is two Item.

6. distance rod endurance test bed as described in claim 1, which is characterized in that the support B is L-type support.

7. distance rod endurance test bed as described in claim 1, which is characterized in that the connecting rod passes through adjustable screw thread Connection.

8. distance rod endurance test bed as described in claim 1, which is characterized in that the support A and support B is arranged in work Make on platform.

9. distance rod endurance test bed as claimed in claim 8, which is characterized in that further include push-pull device at fixed；The push-and-pull Device is connected with support B adjusts distance between support A and support B；Being provided with support B on the workbench along the longitudinal direction can slide Dynamic sliding groove.