System for testing mechanical properties of seat bearing dynamic load

Abstract

The utility model relates to the technical field of motor vehicle seat testing, in particular to a mechanical property testing system for a seat bearing a dynamic load effect. The utility model discloses a mechanical property test system for a seat bearing a dynamic load effect. The system comprises force application equipment, seat fixing equipment and control equipment, the force application equipment comprises an impact device and a lifting and releasing device. The impact device is provided with an impact head, and a sensor is arranged on the impact head. The lifting and releasing device comprises a telescopic driving mechanism and a telescopic piece. The telescopic piece is connected with the impact device and drives the impact device to move upwards in the Z-axis direction. The telescopic piece is separated from the impact device, and the impact device does free falling motion. The seat fixing device comprises a fixing seat which can move along an X axis and a Y axis and can rotate around the X axis. The mechanical property testing system for the seat bearing the dynamic load effect has the advantages that the testing system is practical, detection is easy to achieve, detection data are complete, and detection results are accurate.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor vehicle seat test technical field especially, it relates to a kind of mechanical property test system of seat bears dynamic load action. BACKGROUND

[0002] During the manufacture of motor vehicle, in order to ensure the safety, operability and comfort of vehicle, etc., a large number of tests need to be carried out on each part of the motor vehicle. Among them, the seat will give the human body a rebound force in the process of driving, and the size of the rebound force determines the comfort of the passenger, and the rebound force depends on the impact force and the structure and material of the seat. Therefore, the comfort detection of the seat under dynamic load is also an important detection project in the production process of motor vehicle.

[0003] The comfort detection of motor vehicle seat has been a project that each manufacturer must detect, for example, a kind of seat vibration test method is disclosed in Chinese patent CN104019888A, which comprises a vibration excitation device, a vibration platform, a simulated foot pedal, a first three-axis acceleration sensor, a second three-axis acceleration sensor, a third three-axis acceleration sensor, a data acquisition front end and an upper computer; the first three-axis acceleration sensor, the second three-axis acceleration sensor and the third three-axis acceleration sensor are respectively connected with the data acquisition front end, and the data acquisition front end is connected with the upper computer; the vibration excitation device is arranged on the ground, the vibration platform is located directly above the vibration excitation device, and the bottom surface of the vibration platform is connected with the output shaft of the vibration excitation device; the simulated foot pedal is arranged on the vibration platform. This patent is to detect the comfort of passengers caused by the bumping of uneven road in the process of driving. In reality, the situation of continuous bumping caused by uneven road is relatively rare, and more often, the passengers will be impacted by the seat when they accidentally encounter a large bump in the process of high-speed driving, and the size of the reaction force of the seat to the passengers, and the comfort detection of the passengers to the force is more practical than the above-mentioned patent. In addition, the above-mentioned patent is detected by real people with different body sizes, and this detection method brings difficulties to the detection, and once a person with special body size is missing, it will lead to the problem of incomplete detection data. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims at providing a kind of mechanical property testing system of seat bearing dynamic load effect, adopt the lifting release device of movement along Z axis drive impact device to rise to certain height after release impact head, impact head free fall impact seat, the displacement of seat is received by the sensor set on impact head, the displacement is analyzed and calculated by control equipment, obtain the mechanical property of seat, impact head can increase multiple weights, seat is fixed on fixed seat, fixed seat can move along X axis and Y axis, and can rotate around X axis, it solves the problems, such as seat detection does not have practicality, detection process is difficult to realize, detection data is incomplete, detection result accuracy is poor.

[0005] To solve the above problems, the utility model provides a kind of mechanical property testing system of seat bearing dynamic load effect, comprising:

[0006] Force applying equipment, comprising:

[0007] Impact device, is equipped with impact head, is equipped with sensor on the impact head;

[0008] Lifting release device, comprising:

[0009] Telescopic drive mechanism, can move along Z axis;

[0010] Telescopic part, with the telescopic drive mechanism is connected, can move in the direction of away from and close to the impact device;

[0011] When the lifting release device falls to the position of the impact device, it can be connected with the impact device, and the lifting release device drives the impact device to move upwards along Z axis;

[0012] When the lifting release device moves to the preset height, the telescopic part is separated from the impact device, and the impact device does free fall motion under the action of gravity;

[0013] Seat fixing equipment, comprising:

[0014] Fixed seat, for fixing seat, the fixed seat can move along X axis and Y axis, and can rotate around X axis;

[0015] Control equipment, comprising:

[0016] Processing device, receives the seat deformation information sent by the sensor, and the mechanical property of seat is obtained by analyzing the seat deformation information by the processing device.

[0017] Further, the telescopic drive mechanism is air cylinder, two are set along X axis direction for the air cylinder, and the piston rod of each air cylinder is connected with one telescopic part.

[0018] Further, the impact device further comprises:

[0019] A connecting beam is connected with the impact head at a preset distance, and the telescopic member is detachably connected with the connecting beam.

[0020] Further, the impact device further comprises:

[0021] A weight increasing member is detachably connected with the impact head, and the weight increasing member comprises a plurality of weight increasing members.

[0022] Further, the impact head is connected with the connecting beam through a connecting rod, a stand is arranged on the impact head, and the weight increasing member is pressed on the impact head through the stand;

[0023] The weight increasing member is clamped by the impact head through a pressing assembly above the weight increasing member;

[0024] The pressing mechanism comprises:

[0025] A clamping assembly comprises a first clamping member and a second clamping member, and the connecting rod is clamped by the first clamping member and the second clamping member;

[0026] A through hole is arranged on the first clamping member, and the stand passes through the through hole;

[0027] A pressing block is arranged on the surface of the first clamping member opposite to the impact head, and the pressing block is pressed on the weight increasing member.

[0028] Further, the seat fixing device further comprises:

[0029] An X-axis moving mechanism comprises a plurality of T-shaped sliding grooves extending along the X-axis, and the fixing seat is connected with the sliding grooves through T-shaped bolts;

[0030] A Y-axis moving mechanism comprises a sliding rail and a sliding block, the sliding rail extends along the Y-axis direction, the sliding block is slidably connected with the sliding rail, and the sliding block is connected with the X-axis moving mechanism.

[0031] Further, the Y-axis moving mechanism further comprises a bottom plate, and the sliding block is fixed on the bottom plate.

[0032] Further, the seat fixing device further comprises:

[0033] An angle adjusting mechanism comprises a worm and a worm wheel which are engaged and connected;

[0034] The worm is fixed on the X-axis moving mechanism, and the worm extends along the Y-axis direction;

[0035] The worm wheel is in a semi-ring shape, and the worm wheel is fixed on the bottom plate.

[0036] Further, the worm wheel is fixed on the bottom plate through a support, and the support is in a semi-cylindrical shape.

[0037] Arc-shaped grooves are arranged on the circumferential surfaces of the two ends of the support respectively, and the two ends of the X-axis moving mechanism are slidably connected with the arc-shaped grooves through bolts.

[0038] Further, a handle is arranged at one end of the worm.

[0039] Compared with the prior art, the mechanical property testing system for bearing dynamic load of the seat has the following advantages:

[0040] The technical scheme has the advantages that the lifting and releasing device moving along the Z axis drives the impact device to ascend to a certain height, and then releases the impact head, the impact head freely falls and impacts the seat, the displacement of the seat is received by the sensor arranged on the impact head, the displacement is analyzed and calculated by the control equipment, the mechanical property of the seat is obtained, multiple weights can be added on the impact head, the seat is fixed on the fixed seat, the fixed seat can move along the X axis and the Y axis, and can rotate around the X axis, the testing system is practical, easy to realize detection, complete in detection data, and accurate in detection result. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 A perspective view of the mechanical property testing system is shown in the embodiment of the utility model;

[0042] Figure 2 A perspective view of the force applying equipment is shown in the embodiment of the utility model;

[0043] Figure 3 A perspective view of the lifting and releasing device is shown in the embodiment of the utility model;

[0044] Figure 4 A perspective view of the seat fixing equipment is shown in the embodiment of the utility model.

[0045] EXPLANATION OF REFERENCE NUMERALS:

[0046] 100-force applying equipment, 110-impact device, 111-impact head, 112-sensor, 113-connection beam, 114-stand, 115-clamping assembly, 116-pressing block, 117-connecting rod, 120-lifting and releasing device, 121-telescopic part, 122-telescopic driving mechanism, 123-sliding rod, 130-Z axis moving mechanism, 200-seat fixing equipment, 210-fixed seat, 220-X axis moving mechanism, 230-Y axis moving mechanism, 240-worm, 250-worm wheel, 260-bottom plate, 270-support, 300-control equipment, 400-rack. DETAILED DESCRIPTION

[0047] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model will be described in detail below with reference to the drawings.

[0048] In the utility model, the description of "first", "second", "upper", "lower" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", "upper", "lower" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled persons in the art, and when the technical solutions of the embodiments can be combined, they are within the protection scope required by the utility model.

[0049] The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0050] As shown in Figure 1 , a mechanical property test system for a seat subjected to dynamic load, comprising: a force applying device 100, a seat fixing device 200 and a control device 300. As shown in Figure 2 and Figure 3 , the force applying device 100 comprises: an impact device 110 and a lifting release device 120. The impact device 110 is provided with an impact head 111, and a sensor 112 is arranged on the impact head 111. The lifting release device 120 comprises: a telescopic driving mechanism 122 and a telescopic piece 121. The telescopic driving mechanism 122 can move along the Z axis. The telescopic piece 121 is connected with the telescopic driving mechanism 122 and can move away from and close to the impact device 110. When the lifting release device 120 falls to the position of the impact device 110, it can be connected with the impact device 110, and the lifting release device 120 drives the impact device 110 to move upward along the Z axis. When the lifting release device 120 moves to a preset height, the telescopic piece 121 is separated from the impact device 110, and the impact device 110 does free fall under the action of gravity. As shown in Figure 4 , the seat fixing device 200 comprises: a fixed seat 210 for fixing a seat 210, which can move along the X axis and the Y axis and can rotate around the X axis. The control device 300 comprises: a processing device, which receives the seat deformation information sent by the sensor 112, and analyzes the seat deformation information by the processing device to obtain the mechanical property of the seat.

[0051] Specifically, the system is provided with a Z-axis moving mechanism 130, for example, a hydraulic transmission mechanism, a screw nut mechanism or other existing transmission mechanisms, the lifting releasing device 120 is installed on the Z-axis moving mechanism 130, and the lifting releasing device 120 is driven to move up and down by the transmission mechanism. The system of the application can be provided with a rack 400 arranged along the Z-axis and a platform arranged on the XY plane. The Z-axis moving mechanism 130 and the force applying device are arranged on the rack 400, and the seat fixing device 200 is arranged on the XY plane. The telescopic member 121 of the lifting releasing device 120 is telescoped under the action of the telescopic driving mechanism 122, when the lifting releasing device 120 moves to the position of the impact device 110, the telescopic member 121 is extended to lift the impact device 110, under the action of the Z-axis moving mechanism 130, the telescopic member 121 is retracted to release the impact device 110, and the impact device 110 freely falls onto the seat to generate an impact on the seat. According to the test requirements, multiple height detections can be performed to realize the detection of different impact forces.

[0052] The system detects the mechanical properties of the seat under the action of dynamic load, the detection method is practical, easy to realize detection, complete detection data and accurate detection results.

[0053] Further, the telescopic driving mechanism 122 is a pneumatic cylinder, two pneumatic cylinders are arranged along the X-axis direction, and the piston rod of each pneumatic cylinder is connected with one telescopic member 121.

[0054] The telescopic movement of the telescopic member 121 is realized by the pneumatic device, and the device structure is simple. Other existing mechanisms such as electric push rods can also be used.

[0055] Further, the impact device 110 further comprises a connecting beam 113 connected with the impact head 111 at a preset distance, and the telescopic member 121 is detachably connected with the connecting beam 113.

[0056] The connecting beam 113 is arranged above the impact head 111, two slide rods 123 are arranged on the rack 400, the two ends of the connecting beam 113 pass through the slide rods 123, and the connecting beam 113 can slide up and down along the slide rods 123.

[0057] Further, the impact device 110 further comprises a weight increasing member detachably connected with the impact head 111, and the weight increasing member comprises a plurality of weight increasing members with different weights.

[0058] The weight of the impact head 111 is increased by adding weight increasing members with different weights on the impact head 111, the impact force is changed, and the detection of different impact forces required by the test is realized. The weight increasing member can be a weight.

[0059] Further, the impact head 111 is connected with the connecting beam 113 through the connecting rod 117, a stand 114 is arranged on the impact head 111, and the weight increasing member is pressed on the impact head 111 through the stand 114. The weight increasing member is clamped on the impact head 111 through a pressing assembly above the weight increasing member. The pressing mechanism comprises a clamping assembly 115 comprising a first clamping member and a second clamping member, and the connecting rod 117 is clamped through the first clamping member and the second clamping member. A through hole is arranged on the first clamping member, and the stand 114 passes through the through hole. A pressing block 116 is arranged on the surface of the first clamping member opposite to the impact head 111, and the pressing block 116 is pressed on the weight increasing member.

[0060] As an embodiment, the first clamping member and the second clamping member are in a plate shape, semicircular holes are arranged at two ends of the first clamping member respectively, two second clamping members are arranged, and semicircular holes are also arranged on the second clamping members. The semicircular holes of the first clamping member and the second clamping member are oppositely arranged to clamp the connecting rod 117 and are fastened through screws. After the clamping assembly 115 clamps the connecting rod 117, a preset gap is formed between the first clamping member and the second clamping member. When the weight is added, the weight of the preset weight is passed through the stand 114 and is stacked on the impact head 111 according to the test requirement, the clamping assembly 115 is clamped on the connecting rod 117, the clamping assembly 115 is moved until the pressing block 116 is tightly pressed on the weight, the clamping assembly 115 is fastened, and the weight is prevented from being separated from the impact head 111 due to inertia when the impact head 111 falls, so that the weight increasing effect on the impact head 111 is lost.

[0061] Further, the seat fixing device 200 further comprises an X-axis moving mechanism 220 comprising a plurality of T-shaped sliding grooves extending along the X-axis, and the fixing seat 210 is connected with the sliding grooves through T-shaped bolts. The Y-axis moving mechanism 230 comprises a sliding rail and a sliding block, the sliding rail extends along the Y-axis direction, the sliding block is slidably connected with the sliding rail, and the sliding block is connected with the X-axis moving mechanism 220.

[0062] The movement of the seat in the X-axis direction and the Y-axis direction is realized through the X-axis moving mechanism 220 and the Y-axis moving mechanism 230, and the movement of the overall device in the three coordinate axes is realized by cooperating with the movement of the force applying device 100 in the Z-axis direction.

[0063] Further, the Y-axis moving mechanism 230 further comprises a bottom plate 260, and the sliding block is fixed on the bottom plate 260.

[0064] The movement of the seat fixing device 200 in the Y-axis direction is realized through the movement of the bottom plate 260 in the Y-axis direction, and the fixing seat 210 can be fixed on the bottom plate 260.

[0065] Further, the seat fixing device 200 further comprises an angle adjusting mechanism, which comprises a worm 240 and a worm wheel 250 in meshing connection.

[0066] The worm 240 extends along the Y axis, the tooth portion arranged on the outer circumferential surface of the worm 240 extends along the Y axis, the worm 240 cooperates with the worm wheel 250, and when the worm 240 rotates, the worm 240 rotates around the worm wheel 250, so that the seat rotates around the X axis. On the basis of the movement of the seat fixing device 200 in the X axis and Y axis directions, the rotation of the seat fixing device 200 around the X axis direction is added, which conforms to the adjustment operation of the actual motor vehicle seat, and the comfort detection of the seat in various conditions can be performed.

[0067] Further, the worm wheel 250 is fixed on the bottom plate 260 through a support 270, and the support 270 is in a semi-cylindrical shape. Arc-shaped grooves are arranged on the circumferential surfaces of the two ends of the support 270, respectively, and the two ends of the X axis moving mechanism 220 are slidably connected with the arc-shaped grooves through bolts.

[0068] The semi-annular worm wheel 250 is arranged on the semi-cylindrical support 270, so that the fixation of the worm wheel 250 is realized, and the support 270 can also fix the X axis moving mechanism 220 of the seat fixing base 210 of the seat 210. The arc-shaped grooves arranged at the two ends of the support 270 can cooperate with the rotation of the X axis moving mechanism 220 around the X axis, so that the angle adjustment of the seat is realized.

[0069] Further, a handle is arranged at one end of the worm 240.

[0070] The handle can be in a wrench type, a hand wheel type, or any other form capable of driving the rotation of the worm 240. In order to facilitate operation, it is preferred that an electric mechanism is used to drive the rotation of the worm 240, and any existing technical scheme can be used, and thus detailed description is not given herein.

[0071] Although the utility model discloses as above, the utility model is not limited to this. Any person skilled in the art, without departing from the spirit and scope of the utility model, can make various changes and modifications, and thus the protection scope of the utility model should be limited by the range defined in the claims.

Claims

1. A system for testing the mechanical properties of a seat subjected to dynamic loads, characterized in that it comprises: The utility model relates to a seat dynamic load bearing mechanical property testing system, including: Force application device (100) including: Impact device (110) is equipped with impact head (111), and sensor (112) is equipped on impact head (111); Lifting release device (120) including: Telescopic drive mechanism (122) can move along Z axle; Telescopic part (121) is connected with telescopic drive mechanism (122), can move in the direction away from and close to impact device (110); When lifting release device (120) falls to the position of impact device (110), can be connected with impact device (110), and lifting release device (120) drives impact device (110) and moves upwards along Z axle; When lifting release device (120) moves to the preset height, telescopic part (121) is separated from impact device (110), and impact device (110) does free fall motion under the action of gravity; Seat fixing device (200) including: Fixed seat (210) is used for fixing seat (210) chair, and fixed seat (210) can move along X axle and Y axle and can rotate around X axle; Control device (300) including: Processing device receives seat deformation information sent by sensor (112), and the mechanical property of seat is obtained by the processing device to the seat deformation information.

2. The mechanical property testing system of the seat bearing dynamic load according to claim 1, wherein the telescopic drive mechanism (122) is a pneumatic cylinder, and two pneumatic cylinders are arranged along the X-axis direction, and the piston rod of each pneumatic cylinder is connected with one telescopic part (121).

3. The mechanical property testing system of the seat bearing dynamic load according to claim 2, wherein the impact device (110) further comprises a connecting beam (113) connected with the impact head (111) at a preset distance, and the telescopic part (121) is detachably connected with the connecting beam (113).

4. The mechanical property testing system of the seat bearing dynamic load according to claim 3, wherein the impact device (110) further comprises a weight increasing part detachably connected with the impact head (111), and the weight increasing part comprises a plurality of weight increasing parts.

5. The mechanical property testing system of the seat bearing dynamic load according to claim 4, wherein the impact head (111) is connected with the connecting beam (113) through a connecting rod (117), a stand (114) is arranged on the impact head (111), the weight increasing part passes through the stand (114) and presses on the impact head (111), a pressing assembly is arranged above the weight increasing part to clamp the weight increasing part on the impact head (111), and the pressing assembly comprises a clamping assembly (115) comprising a first clamping part and a second clamping part, the connecting rod (117) is clamped by the first clamping part and the second clamping part, a through hole is arranged on the first clamping part, and the stand (114) passes through the through hole. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ A pressing block (116) is arranged on the surface of the first clamping member opposite to the impact head (111) and presses on the weight member through the pressing block (116).

6. The dynamic load bearing mechanical performance test system of the seat according to claim 1, characterized in that, The seat fixing device (200) further comprises: An X-axis moving mechanism (220) comprising a plurality of T-shaped sliding grooves extending along the X-axis, the fixing seat (210) being connected with the sliding grooves through T-shaped bolts; A Y-axis moving mechanism (230) comprising a sliding rail extending along the Y-axis and a sliding block slidably connected with the sliding rail, and the sliding block being connected with the X-axis moving mechanism (220).

7. The dynamic load bearing mechanical performance test system of the seat according to claim 6, characterized in that, The Y-axis moving mechanism (230) further comprises a bottom plate (260), and the sliding block is fixed on the bottom plate (260).

8. The dynamic load bearing mechanical performance test system of the seat according to claim 7, characterized in that, The seat fixing device (200) further comprises: An angle adjusting mechanism comprising a worm (240) and a worm wheel (250) engagedly connected; The worm (240) is fixed on the X-axis moving mechanism (220), and the worm (240) extends along the Y-axis; The worm wheel (250) is in a semi-ring shape, and the worm wheel (250) is fixed on the bottom plate (260).

9. The dynamic load bearing mechanical performance test system of the seat according to claim 8, characterized in that, The worm wheel (250) is fixed on the bottom plate (260) through a bracket (270), and the bracket (270) is in a semi-cylindrical shape; Arc-shaped grooves are respectively arranged on the circumferential surfaces of the two ends of the bracket (270), and the two ends of the X-axis moving mechanism (220) are slidably connected with the arc-shaped grooves through bolts.

10. The dynamic load bearing mechanical performance test system of the seat according to claim 8, characterized in that, A handle is arranged on one end of the worm (240).

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