CN110763456A

CN110763456A - Automobile safety belt rewinding durability testing machine

Info

Publication number: CN110763456A
Application number: CN201911282115.3A
Authority: CN
Inventors: 丁珺; 陈吉清; 卢嘉
Original assignee: Shanghai Motor Vehicle Inspection Certification and Tech Innovation Center Co Ltd
Current assignee: Shanghai Motor Vehicle Inspection Certification and Tech Innovation Center Co Ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-02-07
Anticipated expiration: 2039-12-13
Also published as: CN110763456B

Abstract

The invention relates to an automobile safety belt rewinding durability testing machine. The automobile safety belt rewinding durability testing machine comprises a rack; the safety belt drawing device comprises a winding reel motor and a winding reel, wherein the winding reel motor is used for driving the winding reel to rotate; the accelerating device comprises a first guide rail, an accelerating motor and an accelerating component, wherein the first guide rail is horizontally arranged, and the accelerating motor can enable the accelerating component to rapidly move a set distance on the first guide rail; the guide buffering device comprises a buffering device base plate, a first force sensor and a guide force measuring wheel, wherein the guide force measuring wheel is arranged on the buffering device base plate through the first force sensor, and the first force sensor is used for measuring the pressure value applied to the guide force measuring wheel; and the clamping device comprises a second guide rail, a clamping mechanism and a safety belt pulling-out motor. The invention provides an automobile safety belt rewinding durability testing machine which can realize two testing schemes, is convenient to operate and control and effectively improves the testing efficiency.

Description

Automobile safety belt rewinding durability testing machine

Technical Field

The invention relates to the technical field of automobile testing, in particular to an automobile safety belt rewinding durability testing machine.

Background

With the increase of the requirements of consumers on automobile products, the attention of host factories to the subjective evaluation of consumers becomes an indispensable requirement, and the requirements of research and development tests are continuously increased. In particular, the number of methods and contents for testing vehicle seat belts is also increasing and expanding. At present, a set of quick rollback testing system for an automobile safety belt retractor is urgently needed to be developed in the market to deal with the requirement.

The existing passenger car safety belt backrush endurance test needs to carry out two test functions: the first type is loosened after all the safety belts are pulled out from the safety belt retractor, and then the safety belts are automatically retracted by the safety belt retractor, pulled out again and retracted, and the process is repeated for at least five times (the times can be set according to needs). The second type draws 2/3 of the total length of the seat belt from the seat belt retractor, then draws 100mm long safety belt from the seat belt retractor, releases, makes 100mm long safety belt withdraw into the seat belt retractor. The belt is pulled out again by 100mm and then retracted, and the cycle is repeated. Both tests are understood to be the operating conditions in actual use.

At present, the automobile safety belt rewinding endurance testing machine can only implement one of the tests, and is low in testing efficiency and inconvenient to use.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the automobile safety belt rewinding endurance testing machine which can realize two testing schemes, is convenient to operate and control and effectively improves the testing efficiency.

Specifically, the invention provides an automobile safety belt rewinding durability testing machine, which is used for testing a safety belt retractor and comprises,

a frame;

the safety belt withdrawing device comprises a take-up reel motor and a take-up reel, wherein the take-up reel motor is used for driving the take-up reel to rotate;

the accelerating device comprises a first guide rail, an accelerating motor and an accelerating component, wherein the first guide rail is horizontally arranged, and the accelerating motor can enable the accelerating component to rapidly move a set distance on the first guide rail;

the guide buffer device comprises a buffer device base plate, a first force sensor and a guide force measuring wheel, wherein the guide force measuring wheel is arranged on the buffer device base plate through the first force sensor, and the first force sensor is used for measuring the pressure value applied to the guide force measuring wheel;

the clamping device comprises a second guide rail, a clamping mechanism and a safety belt pulling-out motor, wherein the second guide rail is vertically arranged, and the safety belt pulling-out motor can enable the clamping mechanism to move a set distance on the second guide rail;

the safety belt drawing device, the guide buffer device, the accelerating device and the clamping device are sequentially arranged on the rack from top to bottom in the vertical direction;

the automobile safety belt rewinding endurance testing machine further comprises a safety belt retractor mounting plate, the safety belt retractor to be tested is arranged on the safety belt retractor mounting plate, and the safety belt retractor mounting plate is suitable for being arranged on the first guide rail or arranged on the rack and located below the clamping device; when the safety belt retractor mounting plate is arranged on the first guide rail, the safety belt retractor mounting plate is in sliding fit with the first guide rail, and a safety belt in the safety belt retractor to be tested is wound upwards on the guide buffer device and then fixed on the belt winding disc; when the safety belt retractor mounting plate is arranged on the rack and located below the clamping device, the safety belt in the safety belt retractor is wound upwards and fixed on the belt winding disc upwards behind the clamping device.

According to one embodiment of the invention, the guide buffer device further comprises a guide assembling and mounting plate, an upper guide wheel and a lower guide wheel, a horizontal groove is formed in the guide buffer device, the guide assembling and mounting plate can move along the horizontal groove, the first force sensor is mounted on the guide assembling and mounting plate, and the guide force measuring wheel is mounted on one side of the first force sensor;

the upper guide wheel and the lower guide wheel are vertically arranged on the buffering device substrate, the guide force measuring wheel is located between the upper guide wheel and the lower guide wheel and deviates from the vertical projection of the upper guide wheel and the lower guide wheel, and the safety belt sequentially bypasses the lower guide wheel, the guide force measuring wheel and the upper guide wheel and is then fixed on the belt coiling disc.

According to an embodiment of the invention, the guide buffer device further comprises a third guide rail, a slider and a first electromagnetic chuck, the first electromagnetic chuck is fixed on the guide assembling mounting plate, the guide assembling mounting plate is magnetically fixed on the buffer device substrate through the first electromagnetic chuck, the third guide rail is horizontally arranged on the buffer device substrate, the slider is fixedly arranged on the guide assembling mounting plate, the third guide rail is matched with the slider, and the guide assembling mounting plate can move along the horizontal groove when the first electromagnetic chuck is in a power-off state.

According to one embodiment of the invention, the base plate of the buffer device is further provided with a guide pin, the guide pin extends into the horizontal groove, the guide assembly mounting plate is provided with a pin hole, the guide pin penetrates through the pin hole, the guide pin is sleeved with a first return spring, one end of the first return spring abuts against one side of the guide assembly mounting plate, and the other end of the first return spring abuts against the inner wall of the horizontal groove.

According to one embodiment of the present invention, the seatbelt retractor is adjustable in its position on the seatbelt retractor mounting plate so that the belt outlet of the seatbelt retractor and the belt take-up opening of the take-up reel are aligned in a vertical direction.

According to an embodiment of the present invention, the acceleration device further includes a ball screw and a second electromagnetic chuck, the acceleration motor is connected with the acceleration member through the ball screw in a screw-fit manner, the second electromagnetic chuck is provided on one side of the acceleration member, and the acceleration member is attracted to the seatbelt retractor mounting plate through the second electromagnetic chuck.

According to an embodiment of the present invention, the second electromagnetic chuck is fixed to the accelerating member in a floating spherical manner, a circular plate is disposed on one side of the seatbelt retractor mounting plate, and the second electromagnetic chuck is opposite to the second electromagnetic chuck, and the second electromagnetic chuck can be attracted to and fixed to the circular plate in a conductive state.

According to one embodiment of the invention, a second force sensor is arranged at the bottom of the mounting plate of the safety belt retractor for detecting the stress condition of the safety belt retractor.

According to one embodiment of the present invention, the clamping mechanism includes a clamping upper plate and a clamping lower plate, and the clamping upper plate is movable in a horizontal direction to be moved closer to and away from the clamping lower plate, so as to clamp or release the seat belt inserted therebetween.

According to an embodiment of the present invention, the clamping lower plate is slidably engaged with the second guide rail, and the seat belt withdrawing motor is connected to the clamping lower plate through a link mechanism, so as to drive the clamping mechanism to slide on the second guide rail.

According to an embodiment of the present invention, the clamping lower plate is provided with a plurality of clamping guide pillars, the clamping upper plate is provided with corresponding mounting through holes, the clamping guide pillars respectively pass through the corresponding through holes, the clamping lower plate is further provided with a third electromagnetic chuck, the clamping upper plate is provided with a third suction plate, and in an electrified state, the third electromagnetic chuck and the third suction plate are magnetically attracted and fixed to each other to clamp the safety belt.

According to an embodiment of the invention, a second return spring is further sleeved on the clamping guide column, the second return spring is arranged between the clamping upper plate and the clamping lower plate, and the second return spring is used for pushing the clamping upper plate away from the clamping lower plate under the power-off state of the third electromagnetic chuck so as to release the safety belt.

According to one embodiment of the invention, two safety belt drawing devices and two clamping devices are arranged on the rack in parallel, one safety belt drawing motor is arranged between the two clamping devices, two sets of link mechanisms meshed through gears are respectively connected into the clamping lower plates of the two clamping devices, and during operation, the safety belt drawing motor drives the clamping mechanism in one clamping device to move upwards, and the clamping mechanism in the other clamping device moves downwards.

The automobile safety belt rewinding endurance testing machine provided by the invention is convenient to operate and control, and can effectively improve the testing efficiency.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention.

In the drawings:

fig. 1 shows a schematic structural view of a seat belt rewinding durability tester of an automobile according to an embodiment of the present invention.

Fig. 2 is a right side view of fig. 1.

Fig. 3 is a perspective view of fig. 1.

Fig. 4 is a partial schematic view showing a seat belt rewinding durability tester for an automobile according to an embodiment of the present invention.

Fig. 5 is a right side view of fig. 4.

Fig. 6 is a perspective view showing a seat belt rewinding durability tester for an automobile according to an embodiment of the present invention.

Fig. 7 is a schematic structural view of the clamping device in fig. 1.

Fig. 8 is a partial cross-sectional view of fig. 7.

Fig. 9 is a side schematic view of fig. 7.

Fig. 10 is a schematic view showing the structure of the guide buffer device of fig. 1.

Fig. 11 is a perspective view of fig. 10.

Fig. 12 is a partial cross-sectional view of fig. 10.

Fig. 13 is a rear side schematic view of fig. 10.

Wherein the figures include the following reference numerals:

automobile safety belt rewinding endurance testing machine 100 rack 101

Acceleration device 103 of seat belt retractor 102

Guide buffer 104 clamping device 105

Tape reel motor 106 tape reel 107

First guide rail 109 of take-up reel mounting plate 108

Acceleration component 111 of acceleration motor 110

Seat belt retractor 112 seat belt 113

The damper base plate 114 first force sensor 115

Second guide rail 117 of guide force measuring wheel 116

Clamping mechanism 118 seat belt pull-out motor 119

Safety belt retractor mounting plate 120 guide assembly mounting plate 121

Upper guide wheel 122 and lower guide wheel 123

Horizontal groove 124 third guide rail 125

First electromagnetic chuck 127 of slide block 126

Guide pin 128 first return spring 129

The second electromagnetic chuck 130 clamps the upper plate 131

The clamping lower plate 132 clamps the guide post 133

Third electromagnet 134 third suction plate 135

Air cylinder 136 clamps rubber 137

Roller 138 electric control cabinet 139

Second return spring 140 suction plate spring 141

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.

Fig. 1 shows a schematic structural view of a seat belt rewinding durability tester of an automobile according to an embodiment of the present invention. Fig. 2 is a right side view of fig. 1. Fig. 3 is a perspective view of fig. 1. Fig. 4 is a partial schematic view showing a seat belt rewinding durability tester for an automobile according to an embodiment of the present invention. Fig. 5 is a right side view of fig. 4. Fig. 6 is a perspective view showing a seat belt rewinding durability tester for an automobile according to an embodiment of the present invention. As shown in the drawing, an automotive seat belt backout endurance tester 100 for testing a seat belt retractor 112 includes a frame 101, a seat belt withdrawing device 102, an accelerating device 103, a guide cushion device 104, and a clamping device 105. Wherein the frame 101 has a frame structure, and the webbing take-up mechanism 102, the guide cushion mechanism 104, the accelerator mechanism 103, and the gripper mechanism 105 are arranged on the frame 101 in this order from top to bottom in the vertical direction.

Further, the webbing draw mechanism 102 includes a take-up reel motor 106 and a take-up reel 107. The seatbelt retracting device 102 is used to retract the seatbelt 113. Conventionally, a take-up reel mounting plate 108 is fixedly mounted on the chassis 101, and a take-up reel 107 and a take-up reel motor 106 are mounted on the take-up reel mounting plate 108. The take-up reel 107 is electrically connected to the take-up reel motor 106, and the take-up reel motor 106 is used for rotating the take-up reel 107. When seat belt 113 is inserted into and secured to take-up reel 107, activation of take-up reel motor 106 can rotate take-up reel 107 to withdraw seat belt 113 from seat belt retractor 112 to be tested.

The acceleration device 103 includes a first guide rail 109, an acceleration motor 110, and an acceleration member 111. During the test, the acceleration device 103 is used to quickly complete the horizontal movement of the belt retractor 112 so that the belt 113 in the belt retractor 112 is self-locking. The first guide rail 109 is horizontally disposed on the frame 101. The accelerating member 111 is slidably engaged with the first guiding rail 109, and the accelerating member 111 can be rapidly moved on the first guiding rail 109 by a set distance by activating the accelerating motor 110. The set distance was set to 50mm during actual testing. By way of example and not limitation, the first rail 109 may be a ball-bearing rail capable of maintaining its linearity to reduce the load on the corresponding motor with minimal friction.

The guide buffer device 104 is used for buffering and protecting the safety belt 113 to be tested and other related components. Guide cushion 104 includes a cushion base plate 114, a first force sensor 115, and a guide force wheel 116. The damping device base plate 114 is fixedly arranged on the frame 101, the guide force measuring wheel 116 is arranged on the damping device base plate 114 through a first force sensor 115, and the first force sensor 115 is used for measuring the pressure value received by the guide force measuring wheel 116.

The clamping device 105 is used to clamp and lift the seat belt 113 during testing. The clamping device 105 includes a second rail 117, a clamping mechanism 118, and a webbing-pull-out motor 119. The second rail 117 is vertically disposed and the belt-drawing motor 119 enables the clamping mechanism 118 to move a set distance on the second rail 117. To meet the test requirements, the set distance is typically 100 mm.

The seatbelt retractor durability tester 100 further includes a seatbelt retractor mounting plate 120 on which a seatbelt retractor 112 to be tested is disposed. The seatbelt retractor mounting plate 120 is adapted to be disposed on the first rail 109 to perform a first test or disposed on the frame 101 below the clamping device 105 to perform a second test. Referring to fig. 1 to 3, in the first test, when the seatbelt retractor mounting plate 120 was disposed on the first guide rail 109, the seatbelt retractor mounting plate 120 was slidably engaged with the first guide rail 109 and allowed to move in conjunction with the accelerating member 111, and the seatbelt 113 of the seatbelt retractor 112 to be tested was wound upward around the guide cushion 104 and fixed to the take-up reel 107. Referring to fig. 4-6, in a second test, the seatbelt retractor mounting plate 120 was disposed on the frame 101 below the clamping device 105, and the seatbelt 113 in the seatbelt retractor 112 was threaded upwardly around the clamping device 105 and secured directly to the take-up reel 107 upwardly.

Fig. 10 is a schematic structural view of the guide buffer 104 in fig. 1. Fig. 11 is a perspective view of fig. 10. Fig. 12 is a partial cross-sectional view of fig. 10. Fig. 13 is a rear side schematic view of fig. 10. As shown, the guide cushion 104 further includes a guide mounting plate 121, an upper guide wheel 122, and a lower guide wheel 123. A horizontal groove 124 is formed in the guide buffer 104, and the guide mounting plate 121 can move along the horizontal groove 124. A first force sensor 115 is mounted on the guide mounting plate 121 and a guide force wheel 116 is mounted on one side of the first force sensor 115. When the guide force wheel 116 receives a pressure from the webbing 113, it abuts against the first force sensor 115, and the first force sensor 115 detects the pressure from the webbing 113.

Specifically, the upper guide wheels 122 and the lower guide wheels 123 are disposed vertically up and down on the buffer substrate 114. The guide force measuring wheel 116 is located between the upper guide wheel 122 and the lower guide wheel 123 and is offset from the vertical projection of the upper guide wheel 122 and the lower guide wheel 123. Referring to fig. 11 and 13, in a first test, seat belt 113 was secured to take-up reel 107 by passing it up and around lower guide wheel 123, guide tension wheel 116 and upper guide wheel 122 in that order. When the webbing 113 is being withdrawn or retracted, the webbing 113 is under tension, and a pressure is applied to the guide tension wheel 116 toward the upper guide wheel 122 and the lower guide wheel 123, the first force sensor 115 is deformed by the pressure and generates an electrical signal which is converted into a force value, thereby detecting the pressure of the webbing 113 applied to the guide tension wheel 116.

Preferably, the guiding and buffering device 104 further comprises a third guiding rail 125, a sliding block 126 and a first electromagnetic chuck 127. The first electromagnetic chuck 127 is fixed on the buffer device base plate 114, and the guide assembling and mounting plate 121 is magnetically fixed on the buffer device base plate 114 through the first electromagnetic chuck 127. The third guide rail 125 is horizontally disposed on the damping device base plate 114, the sliding block 126 is fixedly disposed on the guide mounting plate 121, the third guide rail 125 and the sliding block 126 are matched, and when the first electromagnetic chuck 127 is in a power-off state, the guide mounting plate 121 can move along the horizontal groove 124 in the direction of the force applied to the guide force measuring wheel 116, so as to play a damping role. Preferably, a guide pin 128 is further disposed on the buffer device base plate 114, the guide pin 128 extends into the horizontal groove 124, a pin hole is formed in the guide mounting plate 121, the guide pin 128 penetrates through the pin hole, a first return spring 129 is sleeved on the guide pin 128, one end of the first return spring 129 abuts against one side of the guide mounting plate 121, and the other end of the first return spring 129 abuts against the inner wall of the horizontal groove 124. In fact, when the pressure of the belt 113 on the guide measuring wheel 116 detected by the first force sensor 115 exceeds a threshold value, the first electromagnetic suction cup 127 is de-energized. The guide mounting plate 121 is moved in the horizontal direction of the horizontal groove 124, i.e., in the direction of the guide pin 128, by the pressure of the seat belt 113, and the first return spring 129 is contracted and deformed. After the pressure of the seat belt 113 is buffered, the first electromagnetic chuck 127 is powered, and the guide mounting plate 121 returns to the initial position along the guide pin 128 under the restoring action of the first restoring spring 129, so that the guide mounting plate 121 is magnetically attracted and fixed on the buffer device substrate 114 again by the first electromagnetic chuck 127. The guiding buffer device 104 mainly buffers and protects various components of the automobile seat belt rewinding endurance testing machine 100 and the seat belt 113 through the combination of the first electromagnetic chuck 127 and the first return spring 129.

Turning to fig. 1, the seatbelt retractor 112 is preferably adjustable in its position on the seatbelt retractor mounting plate 120. Corresponding to the belt retractor 112 being movable in the horizontal plane in the left-right and front-back directions, the adjustment is facilitated to align the take-up edge of the take-up reel 107 with the exit of the belt retractor 112 (i.e. to ensure that the belt 113 is retracted in a direction perpendicular to the horizontal plane). And the seat belt retractor 112 can also rotate in the fore-and-aft direction and turn over at an angle to the horizontal plane to meet the angle change of the belt outlets of different types of seat belt retractors 112. Optionally, a second force sensor is disposed at the bottom of the seat belt retractor mounting plate 120 to detect a stress condition of the seat belt retractor mounting plate 120 in the whole testing process. For example, if the second force sensor detects that the set threshold is exceeded 8 times, the test of the seat belt 113 is stopped.

Preferably, the accelerating means 103 further comprises a ball screw and a second electromagnetic chuck 130. The acceleration motor 110 is connected with the acceleration member 111 through a ball screw in a screw-fit manner, a second electromagnetic chuck 130 is provided on one side of the acceleration member 111, and the acceleration member 111 is attracted to the seatbelt retractor mounting plate 120 through the second electromagnetic chuck 130. The acceleration motor 110 is started, and the acceleration member 111 is driven to move linearly along the first guide rail 109 by the action of the ball screw. The seatbelt retractor mounting plate 120 is magnetically attracted and fixed to the accelerating member 111 by the second electromagnetic chuck 130 to be interlocked with the accelerating member 111. During the first test, the acceleration device 103 can instantaneously move the seatbelt retractor 112 by 50mm on the first guide rail 109. Preferably, the second electromagnetic chuck 130 is fixed on the accelerating member 111 in a floating spherical manner, a circular plate is disposed on one side of the seatbelt retractor mounting plate 120, and the second electromagnetic chuck 130 is opposite to the second electromagnetic chuck 130, and the second electromagnetic chuck 130 can be attracted and fixed with the circular plate in a conductive state, so that the two are integrated to move in the same and aligned manner.

Fig. 7 is a schematic structural view of the clamping device in fig. 1. Fig. 8 is a partial cross-sectional view of fig. 7. Fig. 9 is a side schematic view of fig. 7. As shown, the clamping mechanism 118 includes a clamping upper plate 131 and a clamping lower plate 132. The clamping upper plate 131 and the clamping lower plate 132 are arranged in parallel, and the clamping upper plate 131 can move in the horizontal direction to make the clamping upper plate and the clamping lower plate 132 close to and separate from each other to clamp or release the safety belt 113 inserted therebetween. As shown in fig. 1 and 3 in combination, the clamp mechanism 118 is actually used to clamp the webbing 113 and is able to travel up the second rail 117 in the clamped state.

Preferably, the clamping lower plate 132 is in sliding engagement with the second rail 117. The belt-drawing motor 119 is adapted to be disposed on the frame 101, and the belt-drawing motor 119 is connected to the lower clamping plate 132 through a link mechanism, so as to drive the clamping mechanism to slide on the second guide rail 117.

Preferably, a plurality of clamping guide posts 133 are horizontally disposed on the clamping lower plate 132, corresponding mounting through holes are disposed on the clamping upper plate 131, and the clamping guide posts 133 respectively pass through the corresponding through holes. The clamping upper plate 131 moves in the lengthwise direction of the clamping guide post 133 to come close to and separate from the clamping lower plate 132. The third electromagnetic chuck 134 is further disposed on the lower clamping plate 132, the third suction plate 135 is disposed on the upper clamping plate 131, and in the powered state, the third electromagnetic chuck 134 and the third suction plate 135 are magnetically attracted and fixed to each other to clamp the seat belt 113 inserted therebetween. The contact surfaces of the third electromagnetic chuck 134 and the third suction plate 135 are circular, and even if the third electromagnetic chuck and the third suction plate rotate, the mutual adhesion and the adsorption of the third electromagnetic chuck and the third suction plate cannot be influenced.

Preferably, a second return spring 140 is further sleeved on the clamping guide post 133, the second return spring 140 is disposed between the clamping upper plate 131 and the clamping lower plate 132, and the second return spring 140 is used for pushing the clamping upper plate 131 away from the clamping lower plate 132 when the third electromagnetic chuck 134 is in a power-off state, so that a sufficient distance is maintained between the clamping upper plate 131 and the clamping lower plate 132, and the safety belt 113 can smoothly pass through the space. The spacing is preferably 18 mm. The rear end of the third suction plate 135 is provided with a suction plate spring 141, and the suction plate spring 141 can prevent the suction plate and the electromagnetic chuck from being rigidly collided to damage the electromagnetic chuck when the clamping upper plate 131 and the clamping lower plate 132 approach each other.

Preferably, turning back to fig. 1, a cylinder 136 is also provided on the frame 101. The piston rod of the air cylinder 136 extends forward to push the clamping upper plate 131 to approach to the central position of the clamping lower plate 132, and the third suction plate 135 and the third electromagnetic suction cup 134 are attached to each other in an electrified state by overcoming the resetting force of the second resetting spring 140. More preferably, referring to fig. 8 and 9, a clamping rubber 137 is provided on each of the opposing surfaces of the clamping upper plate 131 and the clamping lower plate 132, and when the third suction plate 135 is sucked to the third electromagnetic suction cup 134, the clamping upper plate 131 and the clamping lower plate 132 tightly clamp the seat belt 113 by the clamping rubber 137 and cannot be loosened. After clamping of the belt 113 is completed, the piston rod is naturally retracted, and the cylinder 136 is returned to the initial state. The cylinder 136 is mainly used for providing power for the clamping device 105 before clamping, and the cylinder 136 piston retracts after the clamping device 105 generates self-locking pressure. The clamp 105 may move the belt 113 up to complete a test cycle.

Referring to fig. 1 and 3, preferably, two belt extractors 102 and two grippers 105 are arranged side by side on the frame 101, and a belt-drawing motor 119 is arranged between the two grippers 105, and is coupled to the lower clamping plates 132 of the two grippers 105 through two sets of link mechanisms engaged by gears, respectively. In operation, the belt-retracting motor 119 moves the clamping mechanism 118 of one clamping device 105 upward and, due to the gearing, moves the clamping mechanism 118 of the other clamping device 105 downward. This structure realizes the test action to two sets of seatbelts 113 simultaneously through a set of seatbelt pull-out motor 119, has improved the availability factor that the motor 119 was pulled out to the seatbelt. In addition, since the two sets of clamping devices 105 are operated one above the other and are just one full load and one empty load in one reciprocating stroke, the torque requirement on the belt pull-out motor 119 can be reduced and the power requirement on the belt pull-out motor 119 can be reduced. Note that, since the two harnesses 113 are controlled to operate by one harness pull-out motor 119 and are transmitted to each other by meshing a pair of gears, there is a positional difference in the front-rear direction between the two clamps 105, which is the center distance between the two gears. Therefore, a front-rear position difference exists between the two seat belts 113.

Preferably, a glass frame is covered outside the frame 101 for easy observation and safety protection.

Preferably, a roller 138 with a brake is further arranged at the bottom of the frame 101, so that the whole equipment can be conveniently carried or moved.

Preferably, an electric control cabinet 139 is provided at one side of the frame 101. The electric control cabinet 139 is electrically connected to each component of the automobile seat belt rewinding endurance testing machine 100 to control the take-up reel motor 106, the acceleration motor 110, the seat belt pull-out motor 119, and the like. The electric control cabinet 139 is also connected to the first force sensor 115 and the second force sensor, and can set the force value, the test frequency, the error frequency, the cycle period, etc. of the test and obtain the test data in real time. The electronic control cabinet 139 contains a plurality of modules and software running thereon, which are prior art and are not innovative points of the present invention. The electric control cabinet 139 further has a display screen to display the contents of the force value, the number of tests, the number of errors, the cycle period, and the like, which are tested by the automobile seat belt rewinding durability testing machine 100.

Referring to fig. 3, in the embodiment provided by the present invention, four belt extractors 102, four accelerators 103, four guide buffers 104, four clamps 105, and two belt-pullout motors 119 are simultaneously provided in the vertical direction in the automobile seat belt rewind durability tester 100 to simultaneously complete the test of four seat belt retractors 112. Further improving the efficiency of testing the seatbelt retractor 112.

The operation of the seat belt rewinding durability testing machine 100 according to the present invention in the first test and the second test will be described in detail with reference to all the drawings.

First test:

the take-up reel motor 106 rotates according to the set rotating speed, so that the take-up reel 107 rotates to pull out all the seat belts 113 from the seat belt retractor 112, and then the seat belts are automatically retracted by the retractor, pulled out again and retracted again, and by the fifth time (the number of times can be set as required), the acceleration motor 110 acts to drive the seat belt retractor 112 to rapidly move backwards by a horizontal distance of 50mm, so that the seat belts 113 are forced to be self-locked and then released, and the seat belts 113 are retracted by the retractor. The above steps are repeatedly performed as required by the experiment.

According to the requirements of the first test, firstly, the seat belt retractor mounting plate 120 is arranged on the first guide rail 109, the seat belt retractor 112 to be tested is arranged on the seat belt retractor mounting plate 120, the position of the seat belt retractor 112 on the seat belt retractor mounting plate 120 is adjusted, the belt outlet of the seat belt retractor 112 is aligned with the belt take-up edge of the take-up reel 107, and the seat belt 113 is ensured to be taken up and taken down in the direction vertical to the horizontal plane. The accelerating member 111 is attracted to the seatbelt retractor mounting plate 120 by the second electromagnetic chuck 130. Then, the webbing 113 drawn out of the webbing retractor 112 is wound upward around the lower guide wheel 123, the guide tension roller 116, and the upper guide wheel 122 in the guide buffer 104 in this order, and then is fixed upward to the take-up reel 107.

During the test, the take-up reel 107 is rotated by the take-up reel motor 106 to pull out the webbing 113 stored in the webbing retractor 112. When the take-up reel motor 106 rotates reversely, the take-up reel 107 rotates reversely, i.e. releases the seat belt 113, and the seat belt 113 pulled out is retracted into the retractor completely by the torsion spring inside the seat belt retractor 112. During the test, the safety belt 113 applies a pressure to the guide force wheel 116 in the direction of the upper guide wheel 122 and the lower guide wheel 123, and the first force sensor 115 is deformed by the pressure to generate an electric signal which is converted into a force value, thereby detecting the pressure of the safety belt 113 applied to the guide force wheel 116. The accelerator 103 can instantaneously move the seatbelt retractor 112 by 50mm in the direction of the first guide rail 109, and self-lock the seatbelt 113. When the pressure of the safety belt 113 on the guide force wheel 116 detected by the first force sensor 115 momentarily exceeds a threshold value, the first electromagnetic chuck 127 is de-energized. The guide mounting plate 121 is moved in the horizontal direction of the horizontal groove 124 by the pressure of the seat belt 113, and the first return spring 129 is contracted and deformed. After the buffering mechanism is activated, the first electromagnetic chuck 127 is energized, and the guiding assembly mounting plate 121 returns to the initial position along the guide pin 128 under the restoring action of the first restoring spring 129, so that the guiding assembly mounting plate 121 is magnetically attracted and fixed on the buffering mechanism substrate 114 again by the first electromagnetic chuck 127. The take-up reel motor 106 then reverses to unwind the seat belt 113 and the seat belt 113 is retracted by the retractor. The take-up reel motor 106 is started to drive the take-up reel 107 to pull the seat belt 113 upwards, and the above steps are repeated to complete the first test.

The automobile seat belt rewinding durability testing machine 100 provided by the invention can simultaneously perform the first test on four seat belt retractors 112. If any one of the four safety belts 113 is abnormal or not according with the standard after a plurality of times (the times can be set) continuously, the second electromagnetic chuck 130 and the take-up reel motor 106 connected with and driving the safety belt 113 stop working, the safety belt 113 is not tested until the abnormality is eliminated, but the test of the rest safety belts 113 is not influenced.

Second test:

2/3 of the total length of the safety belt 113 is pulled out from the safety belt retractor 112, and then the safety belt 113 with the length of 100mm is pulled out from the safety belt retractor 112 and is released, so that the safety belt 113 is completely retracted into the safety belt retractor 112. The above steps are repeatedly performed as required by the experiment.

Before testing, the seat belt retractor mounting plate 120 is reset on the frame 101 and located below the clamping device 105, the position of the seat belt retractor 112 on the seat belt retractor mounting plate 120 is adjusted, a belt outlet of the seat belt retractor 112 is aligned with a belt retracting edge of the belt retracting disc 107, and the seat belt 113 is guaranteed to be retracted in a direction perpendicular to the horizontal plane. After the seat belt 113 in the seat belt retractor 112 is passed upward between the clamping upper plate 131 and the clamping lower plate 132 of the clamping device 105, the tongue of the seat belt 113 is inserted into the take-up reel 107 and fixed.

It should be noted that each group of the buffer devices 104 can move along the frame of the rack 101 to the transverse center of the rack 101, so that the buffer devices 104 avoid the stroke of the safety belt 113 during the second test, and the accuracy of the second test is ensured.

The take-up reel 107 is activated to withdraw 2/3 the full length of belt 113 from the belt retractor 112. The cylinder 136 is activated to extend the piston rod forward, the front end of the piston rod faces the center of the clamping upper plate 131, the clamping upper plate 131 is pushed to approach the clamping lower plate 132, and the third suction plate 135 and the third electromagnetic chuck 134 are attached to each other in an electrified state by overcoming the resetting force of the second resetting spring 140. The grip upper plate 131 and the grip lower plate 132 tightly grip the seat belt 113 by the grip rubber 137. The piston rod is naturally retracted and the cylinder 136 is reset. Then, the belt-drawing motor 119 is started, and the link mechanism operates to move the entire clamping mechanism 118 upward by 100mm along the second rail 117, which corresponds to the belt 113 being drawn upward by 100 mm. When the clamping mechanism 118 is de-energized and released, i.e. the third electromagnetic chuck 134 is de-energized, the second return spring 140 pushes the clamping upper plate 131 away from the clamping lower plate 132, keeping a sufficient distance therebetween to release the safety belt 113. The seat belt 113 is fully retracted into the seat belt retractor 112 by the torsion spring within the retractor. The clamping mechanism 118 moves downward to the initial position, during which the reel motor 106 connected to the seat belt 113 does not work, but before the next cycle starts, the reel motor 106 rotates reversely by a set angle, which is equivalent to loosening the seat belt 113 to release the self-locking phenomenon that may occur when the seat belt 113 is rapidly retracted, and the test of the next cycle is continued. The above steps were repeated to complete the second test.

The automobile seat belt rewinding durability testing machine 100 provided by the invention can simultaneously perform the second test on four seat belt retractors 112. And only two belt-drawing motors 119 are required to operate the two sets of clamping mechanisms 118 one on top of the other, reducing the torque requirement on the belt-drawing motors 119 and at the same time reducing the power requirement on the belt-drawing motors 119.

The automobile safety belt rewinding endurance testing machine 100 provided by the invention has the following characteristics:

1. the whole installation is flexible, convenient and simple, and the whole frame structure is symmetrically arranged, neat and beautiful.

2. The cost is greatly reduced by adopting more shared components, and the space between the components is also compressed, so that the activity space for installing the safety belt is increased.

3. The signal trigger piece when using a plurality of electromagnetic chucks for protection can greatly shorten the reaction time of the electric components.

4. The detection of all types of safety belts is applicable, including the convenience of adjusting the angle change when the safety belt is pulled out of the retractor.

5. The safety belt is pulled out by the safety belt clamping mechanism to move upwards, but the safety belt is driven to move upwards by the clamping of the non-cylinder, so that the phenomenon that the cylinder with a thicker air pipe occupies a larger space along with the up-and-down movement is avoided.

6. For the second test function, the two safety belt clamping devices connected with one motor are arranged one above the other and one below the other in a reciprocating stroke, and the requirements on the torque of the motor can be reduced due to the fact that the safety belt clamping devices are just full load and no load.

7. And in the four safety belt detections, any one safety belt does not meet the requirement or has abnormity, and the detection of the safety belt is stopped without influencing the normal detection of the rest three safety belts.

8. The guide buffer device combines the first electromagnetic chuck and the first return spring, shortens the signal triggering time during overload, and then absorbs overload force by the compression of the spring to protect the motor and the safety belt to be tested from being damaged.

9. The accelerating motor is respectively connected with two safety belt retractor mounting plates through two electromagnetic suction cups at two ends, and the actions of the accelerating motor and the safety belt retractor mounting plates can be respectively controlled through power-off and power-on.

10. The whole machine outer frame adopts an organic glass cover frame, so that the observation and the safety protection are facilitated.

It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. An automobile safety belt rewinding durability testing machine is used for testing a safety belt retractor and comprises,

a frame;

2. The automotive seat belt rewinding durability testing machine as claimed in claim 1, wherein said guide cushion device further comprises a guide mounting plate, an upper guide wheel and a lower guide wheel, a horizontal groove is formed on said guide cushion device, said guide mounting plate is movable along said horizontal groove, said first force sensor is mounted on said guide mounting plate, and said guide force measuring wheel is mounted on one side of said first force sensor;

3. The testing machine of claim 2, wherein the guiding and buffering device further comprises a third guiding rail, a sliding block and a first electromagnetic chuck, the first electromagnetic chuck is fixed on the guiding and assembling mounting plate, the guiding and assembling mounting plate is magnetically fixed on the buffering device substrate through the first electromagnetic chuck, the third guiding rail is horizontally arranged on the buffering device substrate, the sliding block is fixedly arranged on the guiding and assembling mounting plate, the third guiding rail is matched with the sliding block, and the guiding and assembling mounting plate can move along the horizontal groove in the power-off state of the first electromagnetic chuck.

4. The machine for testing durability of rewinding of an automobile safety belt according to claim 3, wherein a guide pin is further disposed on the base plate of the buffer device, the guide pin extends into the horizontal groove, a pin hole is disposed on the guide mounting plate, the guide pin is inserted into the pin hole, a first return spring is sleeved on the guide pin, one end of the first return spring abuts against one side of the guide mounting plate, and the other end of the first return spring abuts against an inner wall of the horizontal groove.

5. The automotive seat belt rewinding durability testing machine according to claim 1, wherein the seat belt retractor is adjustable in position on the seat belt retractor mounting plate so that the belt outlet of the seat belt retractor and the belt take-up opening of the take-up reel are aligned in a vertical direction.

6. The automotive seat belt rewinding durability testing machine according to claim 1, wherein said accelerating means further includes a ball screw and a second electromagnetic chuck, said accelerating motor is screw-engaged with said accelerating member through said ball screw, said second electromagnetic chuck is provided on one side of said accelerating member, and said accelerating member is attracted to said seat belt retractor mounting plate through said second electromagnetic chuck.

7. The apparatus according to claim 6, wherein the second electromagnetic chuck is fixed to the acceleration member in a floating spherical manner, and a circular plate is provided on one side of the mounting plate of the seatbelt retractor, opposite to the second electromagnetic chuck, and the second electromagnetic chuck is fixed to the circular plate in an attracting manner in a conductive state.

8. The automotive seat belt rewinding durability testing machine according to claim 1, wherein a second force sensor is provided at a bottom of the seat belt retractor mounting plate for detecting a force condition of the seat belt retractor.

9. The automobile seat belt rewinding durability testing machine as claimed in claim 1, wherein said clamping mechanism includes a clamping upper plate and a clamping lower plate, said clamping upper plate being movable in a horizontal direction to move said clamping upper plate and said clamping lower plate toward and away from each other to clamp or release said seat belt inserted therebetween.

10. The automotive seat belt rewinding durability testing machine of claim 9, wherein the clamping lower plate is slidably engaged with the second rail, and the seat belt withdrawing motor is connected to the clamping lower plate through a link mechanism to drive the clamping mechanism to slide on the second rail.

11. The testing machine for durability of rewinding of automobile safety belt as claimed in claim 10, wherein a plurality of clamping guide posts are disposed on the clamping lower plate, corresponding mounting through holes are disposed on the clamping upper plate, the clamping guide posts respectively pass through the corresponding through holes, a third electromagnetic chuck is further disposed on the clamping lower plate, a third suction plate is disposed on the clamping upper plate, and in an energized state, the third electromagnetic chuck and the third suction plate are magnetically attracted and fixed to each other to clamp the safety belt.

12. The rolling durability test machine for the car seat belt according to claim 11, wherein a second return spring is further sleeved on the clamping guide post, the second return spring is disposed between the clamping upper plate and the clamping lower plate, and the second return spring is used for pushing the clamping upper plate away from the clamping lower plate to release the seat belt when the third electromagnetic chuck is in a power-off state.

13. The automotive seat belt rewinding durability testing machine as claimed in claim 9, wherein two seat belt withdrawing devices and two clamping devices are juxtaposed on said frame, one seat belt withdrawing motor is disposed between said two clamping devices, two sets of said link mechanisms engaged through gears are respectively engaged with the lower clamping plates of said two clamping devices, and in operation, said seat belt withdrawing motor drives the clamping mechanism of one of said clamping devices to move upward and the clamping mechanism of the other of said clamping devices to move downward.