CN110763456B - Automobile safety belt rollback endurance test machine - Google Patents

Abstract

The invention relates to an automobile safety belt rewinding endurance test machine. The automobile safety belt rewinding endurance test machine comprises a frame; the safety belt extraction 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 member, wherein the first guide rail is horizontally arranged, and the accelerating motor can enable the accelerating member to rapidly move on the first guide rail for a set distance; the guide buffer device comprises a buffer device substrate, a first force sensor and a guide force measuring wheel, wherein the guide force measuring wheel is arranged on the buffer device substrate through the first force sensor, and the first force sensor is used for measuring the pressure value received by the guide force measuring wheel; the clamping device comprises a second guide rail, a clamping mechanism and a safety belt pulling motor. The invention provides an automobile safety belt rewinding endurance testing machine, which can realize two testing schemes, is convenient to operate and control and effectively improves testing efficiency.

Description

Automobile safety belt rollback endurance test machine

Technical Field

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

Background

As consumer demand for automotive products increases, host factories become an indispensable requirement for subjective evaluation of consumers, and so does the demand for such development tests. In particular, the test methods and contents for automobile safety belts are also increasing and expanding. There is an urgent need in the market to develop a rapid rewind test system for car seat belt retractors to cope with this.

The existing passenger car safety belt rollback endurance test needs to be carried out with two test functions: the first type is to withdraw all the webbing from the webbing retractor, then to unwind the webbing, then to retract the webbing retractor by itself, then to withdraw the webbing, and then to retract the webbing, and so on, at least five times (the number of times can be set as required). The second pulls out 2/3 of the total length of the webbing from the webbing retractor, and then pulls out the webbing of 100mm length from the webbing retractor, and releases the webbing of 100mm length to retract into the webbing retractor. The 100mm seat belt is pulled out again and retracted again, and the cycle is performed. Both tests can be understood as operating conditions in actual use.

The existing automobile safety belt rewinding endurance test machine can only implement one of the tests, and is low in test 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 endurance test machine for testing a safety belt retractor, comprising,

A frame;

The safety belt extraction 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 member, wherein the first guide rail is horizontally arranged, and the accelerating motor can enable the accelerating member to rapidly move on the first guide rail for a set distance;

The guide buffer device comprises a buffer device substrate, a first force sensor and a guide force measuring wheel, wherein the guide force measuring wheel is arranged on the buffer device substrate through the first force sensor, and the first force sensor is used for measuring the pressure value received by the guide force measuring wheel;

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

The safety belt extraction device, the guide buffer device, the accelerating device and the clamping device are sequentially arranged on the frame from top to bottom along the vertical direction;

the automobile safety belt rewinding endurance test machine further comprises a safety belt retractor mounting plate, wherein the safety belt retractor mounting plate for testing 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 the rack and is positioned 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 the safety belt in the safety belt retractor to be tested is wound on the guide buffer device upwards and then fixed on the take-up reel; when the seat belt retractor mounting plate is arranged on the frame and below the clamping device, the seat belt in the seat belt retractor is wound upwards after the clamping device and is fixed to the take-up reel upwards.

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

The upper guide wheel and the lower guide wheel are arranged on the buffer device substrate up and down in the vertical direction, the guide force measuring wheel is positioned 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 upwards bypasses the lower guide wheel, the guide force measuring wheel and the upper guide wheel in sequence and is then fixed on the take-up reel.

According to one embodiment of the invention, the guiding and buffering device further comprises a third guide rail, a sliding block and a first electromagnetic chuck, wherein 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 guide rail is horizontally arranged on the buffering device substrate, the sliding block is fixedly arranged on the guiding and assembling mounting plate, the third guide rail is matched with the sliding block, and the guiding and assembling mounting plate can move along the horizontal groove in a power failure state of the first electromagnetic chuck.

According to one embodiment of the invention, a guide pin is further arranged on the buffer device base plate, the guide pin stretches into the horizontal groove, a pin hole is formed in the guide assembly mounting plate, the guide pin penetrates into the pin hole, a first reset spring is sleeved on the guide pin, one end of the first reset spring abuts against one side of the guide assembly mounting plate, and the other end of the first reset spring abuts against the inner wall of the horizontal groove.

According to one embodiment of the invention, the seat belt retractor is adjustable in its position on the seat belt retractor mounting plate such that the exit opening of the seat belt retractor and the take-up opening of the take-up spool are aligned in a vertical direction.

According to one embodiment of the invention, the accelerating device further comprises a ball screw and a second electromagnetic chuck, the accelerating motor is in threaded fit connection with the accelerating member through the ball screw, the second electromagnetic chuck is arranged on one side of the accelerating member, and the accelerating member is adsorbed to the seat belt retractor mounting plate through the second electromagnetic chuck.

According to one embodiment of the invention, the second electromagnetic chuck is fixed on the accelerating member in a floating spherical manner, a circular plate is arranged on one side of the seat belt retractor mounting plate, and the second electromagnetic chuck is opposite to the second electromagnetic chuck and can be attracted and fixed with 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 seat belt retractor mounting plate and is used for detecting the stress condition of the seat belt retractor.

According to one embodiment of the present invention, the clamping mechanism includes a clamping upper plate and a clamping lower plate, the clamping upper plate being movable in a horizontal direction to bring the clamping upper plate and the clamping lower plate toward and away from each other to clamp or release the webbing interposed therebetween.

According to one embodiment of the invention, the clamping lower plate is in sliding fit with the second guide rail, and the safety belt pulling motor is connected with the clamping lower plate through a connecting rod mechanism, so that the clamping mechanism is driven to slide on the second guide rail.

According to one embodiment of the invention, the clamping lower plate is provided with a plurality of clamping guide posts, the clamping upper plate is provided with corresponding mounting through holes, the clamping guide posts respectively penetrate through the corresponding through holes, the clamping lower plate is also provided with a third electromagnetic chuck, the clamping upper plate is provided with a third suction plate, and the third electromagnetic chuck and the third suction plate are mutually and magnetically fixed in a power-on state so as to clamp the safety belt.

According to one embodiment of the invention, a second reset spring is further sleeved on the clamping guide post, the second reset spring is arranged between the clamping upper plate and the clamping lower plate, and the second reset 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 frame in parallel, one safety belt drawing motor is arranged between the two clamping devices, two sets of connecting rod mechanisms meshed through gears are respectively connected into clamping lower plates in the two clamping devices, and when the safety belt drawing motor works, the safety belt drawing motor drives the clamping mechanism in one clamping device to ascend, and the clamping mechanism in the other clamping device to descend.

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 application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application.

In the accompanying drawings:

fig. 1 is a schematic view showing the structure of an automobile seat belt rewind endurance test machine 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 shows a partial schematic view of an automotive seat belt rewind endurance test machine according to one embodiment of the present invention.

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

Fig. 6 shows a perspective view of an automobile seat belt rewind endurance test machine according to an embodiment of the present invention.

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

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

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

Fig. 10 is a schematic view 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 schematic view of fig. 10.

Wherein the above figures include the following reference numerals:

automobile safety belt rollback endurance test machine 100 rack 101

Seat belt extraction device 102 accelerator 103

Guide buffer 104 clamping device 105

Reel motor 106 reel 107

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

Acceleration motor 110 acceleration member 111

Seatbelt retractor 112 seatbelt 113

Buffer substrate 114 first force sensor 115

Second guide rail 117 of guiding force measuring wheel 116

Clamping mechanism 118 belt pullout motor 119

The seatbelt retractor mounting plate 120 guides the mounting plate 121

Upper guide wheel 122 and lower guide wheel 123

Third guide rail 125 of horizontal groove 124

First electromagnetic chuck 127 of slider 126

Guide pin 128 first return spring 129

The second electromagnetic chuck 130 clamps the upper plate 131

Clamping guide post 133 for clamping lower plate 132

Third electromagnetic absorber 134 and third absorber plate 135

Cylinder 136 holds rubber 137

Roller 138 electric control cabinet 139

Second return spring 140 suction plate spring 141

Detailed Description

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

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the 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 exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present application, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative 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 in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present application. Furthermore, although terms used in the present application are selected from publicly known and commonly used terms, some terms mentioned in the present specification 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. Furthermore, it is required that the present application is understood, not simply by the actual terms used but by the meaning of each term lying within.

Fig. 1 is a schematic view showing the structure of an automobile seat belt rewind endurance test machine 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 shows a partial schematic view of an automotive seat belt rewind endurance test machine according to one embodiment of the present invention. Fig. 5 is a right side view of fig. 4. Fig. 6 shows a perspective view of an automobile seat belt rewind endurance test machine according to an embodiment of the present invention. As shown in the figure, an automobile seat belt retractor durability test machine 100 for testing a seat belt retractor 112 includes a frame 101, a seat belt extracting device 102, an accelerating device 103, a guide buffer device 104, and a clamping device 105. Wherein the frame 101 has a frame structure, and the webbing extraction device 102, the guide buffer device 104, the accelerator device 103, and the clamp device 105 are arranged on the frame 101 in this order from top to bottom in the vertical direction.

Further, the webbing extraction device 102 includes a take-up reel motor 106 and a take-up reel 107. The seat belt extraction device 102 is used to extract a seat belt 113. Conventionally, a take-up reel mounting plate 108 is fixedly mounted on the frame 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 a take-up reel motor 106, and the take-up reel motor 106 is configured to rotate the take-up reel 107. When the safety belt 113 is inserted and fixed into the take-up reel 107, the take-up reel motor 106 is started to rotate the take-up reel 107 to withdraw the safety belt 113 from the safety belt retractor 112 to be tested.

The accelerator 103 includes a first rail 109, an accelerator motor 110, and an accelerator member 111. During the test, the accelerator 103 is used to quickly complete the horizontal movement of the seat belt retractor 112 to self-lock the seat belt 113 in the seat belt retractor 112. The first rail 109 is horizontally disposed on the frame 101. The accelerating member 111 is slidably engaged with the first guide rail 109, and the accelerating motor 110 is started to enable the accelerating member 111 to rapidly move on the first guide rail 109 for a set distance. The set distance was set to 50mm during the actual test. By way of example and not limitation, the first rail 109 may be a ball rail that maintains its straightness with minimal friction to reduce the load on the corresponding motor.

The guiding buffer device 104 is used for buffering and protecting the tested safety belt 113 and other related components. The guiding buffer device 104 comprises a buffer device base plate 114, a first force sensor 115 and a guiding load wheel 116. The buffer device base plate 114 is fixedly arranged on the frame 101, the guiding force measuring wheel 116 is arranged on the buffer 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 guiding 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 belt pullout motor 119. The second guide 117 is vertically disposed, and the webbing pull-out motor 119 can move the clamping mechanism 118 a set distance on the second guide 117. To meet the test requirements, the set distance is typically 100mm.

The automobile seat belt rewind endurance test machine 100 further includes a seat belt retractor mounting plate 120 on which the seat belt retractor 112 for test is disposed. The seat belt retractor mounting plate 120 is adapted to be disposed on the first rail 109 to perform a first test or 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 is provided on the first guide rail 109, the seatbelt retractor mounting plate 120 is slidably fitted with the first guide rail 109 and may be interlocked with the acceleration member 111, and the seatbelt 113 in the seatbelt retractor 112 to be tested is wound up on the guide buffer 104 and then fixed to the take-up reel 107. Referring to fig. 4-6, in a second test, a seat belt retractor mounting plate 120 was provided on the frame 101 below the clamping device 105, and the seat belt 113 in the seat belt retractor 112 was wound up around the clamping device 105 and secured directly to the take-up reel 107.

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 schematic view of fig. 10. As shown, the guide buffer 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 is movable along the horizontal groove 124. A first force sensor 115 is mounted on the guide mounting plate 121, and a guide force measuring wheel 116 is mounted on one side of the first force sensor 115. When the guiding force-measuring wheel 116 receives pressure from the safety belt 113, it will be closely attached to the first force sensor 115, and the first force sensor 115 is used for detecting pressure from the safety belt 113.

Specifically, the upper guide wheel 122 and the lower guide wheel 123 are disposed vertically up and down on the buffer substrate 114. The guide day 116 is located between the upper and lower guide wheels 122, 123 and is offset from the vertical projection of the upper and lower guide wheels 122, 123. Referring to fig. 11 and 13, in the first test, the webbing belt 113 was fixed to the take-up reel 107 after passing up around the lower guide wheel 123, the guide dynamometer wheel 116, and the upper guide wheel 122 in this order. When the seat belt 113 is drawn or recovered, the seat belt 113 generates a pressure on the guiding force-measuring wheel 116 toward the upper guiding wheel 122 and the lower guiding wheel 123 under the action of stretching, and the first force sensor 115 is deformed by compression to send an electric signal to be converted into a force value, so that the pressure of the seat belt 113 on the guiding force-measuring wheel 116 is detected.

Preferably, the guiding buffer device 104 further comprises a third guide rail 125, a slider 126 and a first electromagnetic chuck 127. The first electromagnetic chuck 127 is fixed to the buffer substrate 114, and the guide mounting plate 121 is magnetically fixed to the buffer substrate 114 by the first electromagnetic chuck 127. The third guide rail 125 is horizontally arranged on the buffer device substrate 114, the sliding block 126 is fixedly arranged on the guide assembly mounting plate 121, the third guide rail 125 is matched with the sliding block 126, and the guide assembly mounting plate 121 can move along the horizontal groove 124 towards the stress direction of the guide force measuring wheel 116 in the power-off state of the first electromagnetic chuck 127 so as to play a role of buffer. More preferably, a guide pin 128 is further disposed on the buffer device substrate 114, the guide pin 128 extends into the horizontal slot 124, a pin hole is formed on the guide assembly mounting plate 121, the guide pin 128 is inserted into 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 assembly mounting plate 121, and the other end abuts against the inner wall of the horizontal slot 124. In fact, when the pressure of the safety belt 113 applied to the guiding force-measuring wheel 116 detected by the first force sensor 115 exceeds a threshold value, the first electromagnetic chuck 127 is powered down. Under the pressure of the safety belt 113, the guide mounting plate 121 is driven to move in the horizontal direction of the horizontal groove 124, that is, in the direction of the guide pin 128, and the first return spring 129 is contracted and deformed. After the pressure of the safety belt 113 is buffered, the first electromagnetic chuck 127 is powered on, and the guide mounting plate 121 returns to the initial position along the guide pin 128 under the reset action of the first reset spring 129, so that the guide mounting plate 121 is magnetically fixed on the buffer device substrate 114 again through the first electromagnetic chuck 127. The guide buffer 104 buffers and protects the components of the car seat belt retractor durability test machine 100 and the seat belt 113 mainly by a combination of the first electromagnetic chuck 127 and the first return spring 129.

Turning back to fig. 1, the seat belt retractor 112 is preferably capable of adjusting its position on the seat belt 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 so that the webbing take-up edge of the take-up spool 107 is aligned with the webbing exit of the belt retractor 112 (i.e., the retraction of the webbing 113 in a direction perpendicular to the horizontal plane is ensured). And the seat belt retractor 112 can also rotate in the front-back direction and turn over at an angle to the horizontal to meet the angle change of the belt outlet of different types of seat belt retractors 112. Optionally, a second force sensor is provided at the bottom of the seat belt retractor mounting plate 120 to detect the force applied to the seat belt retractor mounting plate 120 throughout the test. 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 acceleration device 103 further comprises a ball screw and a second electromagnetic chuck 130. The accelerating motor 110 is connected with the accelerating member 111 in a threaded fit through a ball screw, a second electromagnetic chuck 130 is provided on one side of the accelerating member 111, and the accelerating member 111 is attracted to the seatbelt retractor mounting plate 120 through the second electromagnetic chuck 130. The accelerating motor 110 is started, and the accelerating member 111 is driven to linearly move along the first guide rail 109 under the action of the ball screw. The seatbelt retractor mounting plate 120 is magnetically fixed to the acceleration member 111 by the second electromagnetic chuck 130 and is linked with the acceleration member 111. During the first test, the accelerator 103 can instantaneously move the seatbelt retractor 112 50mm on the first rail 109. More preferably, the second electromagnetic chuck 130 is fixed on the accelerating member 111 in a floating spherical manner, a circular plate is provided on one side of the seat belt retractor mounting plate 120, and the second electromagnetic chuck 130 can be attracted and fixed with the circular plate in a conductive state opposite to the second electromagnetic chuck 130, and the second electromagnetic chuck 130 and the circular plate are integrally and concentrically moved in alignment.

Fig. 7 is a schematic view of the structure of the clamping device in fig. 1. Fig. 8 is a partial cross-sectional view of fig. 7. Fig. 9 is a schematic side view of fig. 7. As shown, the clamping mechanism 118 includes a clamp upper plate 131 and a clamp lower plate 132. The clamp upper plate 131 and the clamp lower plate 132 are disposed in parallel, and the clamp upper plate 131 can move in the horizontal direction to be brought close to and separated from the clamp lower plate 132 to clamp or release the webbing 113 interposed therebetween. As shown in fig. 1 and 3, in practice, the clamping mechanism 118 is used to clamp the webbing 113 and can 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 pullout motor 119 is adapted to be disposed on the frame 101, and the belt pullout motor 119 is connected to the clamping lower plate 132 through a linkage mechanism, so as to drive the clamping mechanism to slide on the second rail 117.

Preferably, a plurality of clamping guide posts 133 are disposed on the clamping lower plate 132 along the horizontal direction, corresponding mounting through holes are formed 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 along the length direction of the clamping guide post 133 and moves toward and away from the clamping lower plate 132. A third electromagnetic chuck 134 is further disposed on the clamping lower plate 132, and a third suction plate 135 is disposed on the clamping upper 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 passing therebetween. The contact surfaces of the third electromagnetic chuck 134 and the third suction plate 135 are all round, and even if the third electromagnetic chuck and the third suction plate rotate during the test, the contact surfaces are not affected by the mutual adhesion and adsorption of the third electromagnetic chuck and the third suction plate.

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 in a power-off state of the third electromagnetic chuck 134, so that a sufficient distance is kept between the clamping upper plate 131 and the clamping lower plate 132, so that the safety belt 113 can smoothly pass through. The spacing is preferably 18mm. The third suction plate 135 is provided at its rear end with a suction plate spring 141, and the suction plate spring 141 can prevent the suction plate from being damaged by rigid collision with the electromagnetic chuck when the clamping upper plate 131 and the clamping lower plate 132 are close.

Preferably, turning 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 upper clamping plate 131 to close to the center of the lower clamping plate 132, and overcomes the restoring force of the second restoring spring 140 to enable the third suction plate 135 to be in adsorption fit with the third electromagnetic chuck 134 in the electrified state. Still preferably, referring to fig. 8 and 9, clamping rubbers 137 are provided on opposite sides of the clamping upper plate 131 and the clamping lower plate 132, and the clamping upper plate 131 and the clamping lower plate 132 tightly clamp the seat belt 113 by the clamping rubbers 137 without being released when the third suction plate 135 is sucked with the third electromagnetic chuck 134. After the clamping of the seat belt 113 is completed, the piston rod is naturally retracted, and the cylinder 136 returns to the original state. The cylinder 136 is mainly used for providing power for the clamping device 105 before clamping, and after the clamping device 105 generates self-locking pressure, the piston of the cylinder 136 is retracted. The clamping device 105 can drive the seat belt 113 up to complete a test cycle.

Referring to fig. 1 and 3, preferably, two webbing extraction devices 102 and two clamping devices 105 are juxtaposed on the frame 101, and a webbing pull-out motor 119 is disposed between the two clamping devices 105, and two sets of link mechanisms engaged by gears are respectively connected to the clamping lower plates 132 in the two clamping devices 105. In operation, the belt pullout motor 119 drives the clamping mechanism 118 in one clamping device 105 upward, and, due to the meshing of the gears, drives the clamping mechanism 118 in the other clamping device 105 downward. The structure simultaneously realizes the test actions of the two groups of safety belts 113 through the set of safety belt drawing motors 119, and improves the service efficiency of the safety belt drawing motors 119. In addition, because the two sets of clamping devices 105 run one above the other, in a round-trip, they are just one full load and one no load, the torque requirements on the belt retractor motor 119 can be reduced, and the power requirements on the belt retractor motor 119 can be reduced. Since the two belts 113 are controlled to operate by the single belt pullout motor 119 and are transmitted by meshing the pair of gears, there is a difference in position between the two clamping devices 105 in the front-rear direction, which is the center distance between the two gears. There is a difference in front-rear position between the two seat belts 113.

Preferably, a glass cover frame is further covered outside the frame 101, so that the observation and the safety protection are facilitated.

Preferably, a roller 138 with a brake is also 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 various components on the automobile seat belt rewinding endurance testing machine 100 to realize the control of the take-up reel motor 106, the acceleration motor 110, the seat belt pullout motor 119, and the like. The electric control cabinet 139 is also connected with the first force sensor 115 and the second force sensor, can set the tested force value, the tested times, the tested error times, the cycle period and the like, and can acquire the tested 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 also has a display screen to display the force value, the number of tests, the number of errors, the cycle period, etc. tested by the car seat belt rewind endurance test machine 100.

Referring to fig. 3, in the embodiment provided by the present invention, four webbing extraction devices 102, four acceleration devices 103, four guide buffers 104, four clamping devices 105, and two webbing pullout motors 119 are simultaneously provided in the vertical direction in the automobile webbing retractor endurance test machine 100 to simultaneously complete the test of four webbing retractors 112. Further improving the efficiency of testing the seatbelt retractor 112.

The operation of the automobile seat belt rewind endurance test 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 motor 106 rotates according to the set rotation speed, so that the belt reel 107 rotates to pull out all the safety belt 113 from the safety belt retractor 112, then the safety belt 113 is automatically retracted by the retractor, pulled out and retracted again, and when the time reaches the fifth time (the time can be set according to the needs), the accelerating motor 110 acts to drive the safety belt retractor 112 to quickly move backwards for a horizontal distance of 50mm, the safety belt 113 is forced to be self-locked and then released, and the safety belt 113 is retracted by the retractor. The above steps are repeatedly performed according to the test requirement.

According to the first test requirement, the seatbelt retractor mounting plate 120 is first provided on the first guide rail 109, the seatbelt retractor 112 for test is provided on the seatbelt retractor mounting plate 120, and the position of the seatbelt retractor 112 on the seatbelt retractor mounting plate 120 is adjusted so that the webbing exit port of the seatbelt retractor 112 is aligned with the webbing take-up edge of the take-up spool 107, and the direction of the seatbelt 113 perpendicular to the horizontal plane is ensured. The acceleration member 111 is attracted to the seatbelt retractor mounting plate 120 by the second electromagnetic chuck 130. Then, the webbing 113 in the webbing retractor 112 is drawn out, and then sequentially passed upward around the lower guide wheel 123, the guide dynamometer wheel 116, and the upper guide wheel 122 in the guide buffer 104, and then continues to be 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 is reversed, the take-up reel 107 is then reversed, i.e., the webbing 113 is unwound, and the webbing 113 pulled out is fully retracted into the retractor by the torsion spring inside the retractor 112. During the test of the safety belt 113, a pressure is generated on the guiding force measuring wheel 116 in the directions of the upper guiding wheel 122 and the lower guiding wheel 123, and the first force sensor 115 is pressed and deformed to send out an electric signal to be converted into a force value, so that the pressure of the safety belt 113 on the guiding force measuring wheel 116 is detected. The accelerator 103 can instantaneously move the seatbelt retractor 112 50mm in the direction of the first rail 109, thereby self-locking the seatbelt 113. When the pressure of the safety belt 113 borne by the guiding force-measuring wheel 116 detected by the first force sensor 115 instantaneously exceeds a threshold value, the first electromagnetic chuck 127 is powered off. Under the pressure of the safety belt 113, the guide mounting plate 121 is driven to move in the horizontal direction of the horizontal groove 124, and the first return spring 129 contracts and deforms. After the buffer device acts, the first electromagnetic chuck 127 is powered on, and the guide assembly mounting plate 121 returns to the initial position along the guide pin 128 under the reset action of the first reset spring 129, so that the guide assembly mounting plate 121 is magnetically fixed on the buffer device substrate 114 again through the first electromagnetic chuck 127. The take-up reel motor 106 then reverses to unwind the seat belt 113, the seat belt 113 being retracted by the retractor. The reel motor 106 is started to drive the reel 107 to pull the safety belt 113 upwards, and the above steps are repeated to complete the first test.

The automobile seat belt rewind endurance test machine 100 provided by the invention can simultaneously perform the test of the first test on four seat belt retractors 112. If any one of the four belts 113 is abnormal or out of standard several times (the number of times can be set) continuously during the test, the second electromagnetic chuck 130 and the reel motor 106 connected to and driving the belt 113 stop working, the belt 113 is not tested to the exception removal, but the test of the rest belts 113 is not affected.

Second test:

the entire length of the webbing 113 is pulled out from the webbing retractor 112 by 2/3, and then the webbing 113 of 100mm length is pulled out from the webbing retractor 112 and released, so that the webbing 113 is fully retracted into the webbing retractor 112. The above steps are repeatedly performed according to the test requirement.

Before testing, the seat belt retractor mounting plate 120 is rearranged on the frame 101 and positioned below the clamping device 105, and the position of the seat belt retractor 112 on the seat belt retractor mounting plate 120 is adjusted, so that the belt outlet of the seat belt retractor 112 is aligned with the belt collecting edge of the belt collecting disc 107, and the seat belt 113 is collected and released in the direction perpendicular to the horizontal plane. After the webbing 113 in the webbing retractor 112 passes upward between the clamping upper plate 131 and the clamping lower plate 132 of the clamping device 105, the tongue of the webbing 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 toward the transverse center position of the rack 101 along the frame of the rack 101, so that the buffer devices 104 avoid the travel of the safety belt 113 during the second test process, and ensure the accuracy of the second test.

The take-up reel 107 is activated and 2/3 of the total length of the webbing 113 is pulled out from the webbing retractor 112. The cylinder 136 is activated to extend the piston rod forward, the front end of the piston rod is aligned with the center of the upper clamping plate 131, the upper clamping plate 131 is pushed to close to the lower clamping plate 132, and the restoring force of the second restoring spring 140 is overcome to enable the third suction plate 135 and the third electromagnetic chuck 134 to be in adsorption fit in the electrified state. The clamp upper plate 131 and the clamp lower plate 132 clamp the webbing 113 tightly by the clamp rubber 137. The piston rod is naturally retracted and the cylinder 136 is reset. Then, the belt pullout motor 119 is started, and the link mechanism operates to drive the entire clamping mechanism 118 to move upward along the second rail 117 by 100mm, which corresponds to the upward pullout of the belt 113 by 100mm. The clamping mechanism 118 is de-energized and released, i.e., the third electromagnetic chuck 134 is de-energized, and the second return spring 140 pushes the clamping upper plate 131 away from the clamping lower plate 132, maintaining a sufficient spacing therebetween to release the seat belt 113. The seat belt 113 is fully retracted into the seat belt retractor 112 by a torsion spring inside the retractor. The clamping mechanism 118 is lowered to the starting position, during which the take-up reel motor 106 that is connected to the belt 113 is not operated, but the take-up reel motor 106 is reversed by a set angle before the next cycle begins, which corresponds to releasing the belt 113 to release the possible self-locking of the belt 113 during rapid recovery, and continuing the test for the next cycle. The above steps were repeated to complete the second test.

The automobile seat belt rewind endurance test machine 100 provided by the invention can simultaneously perform the test of the second test on the four seat belt retractors 112. And only two belt pullout motors 119 are needed, so that the two groups of clamping mechanisms 118 run up and down, the torque requirement on the belt pullout motors 119 is reduced, and the power requirement on the belt pullout motors 119 can be reduced.

The automobile safety belt rewinding endurance test 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 due to the adoption of more shared components, and the space between the components is also compressed, so that the movable space for installing the safety belt is increased.

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

4. Detection of all types of seat belts is applicable, including facilitating adjustment of the angular change of the seat belt as it is pulled from its retractor.

5. The safety belt clamping mechanism pulls out the safety belt to move upwards, and the safety belt is driven to move upwards by clamping the safety belt instead of the air cylinder, so that the air cylinder with a thicker air pipe is prevented from occupying a larger space along with the up-down motion.

6. For the second test function, the two belt clamping devices connected by one motor are one on top of the other and one off the other, and in one round trip, the two belt clamping devices are just one full load and one no load, so that the torque requirement on the motor can be reduced.

7. And detecting four safety belts simultaneously, wherein any one safety belt is out of order or has abnormality, and the test of the safety belt is stopped without influencing the continuous normal test of the other three safety belts.

8. The guiding buffer device combines the first electromagnetic chuck with the first reset spring, shortens the signal triggering time when in overload, and then the spring is pressed to absorb overload force, so that the motor and the tested safety belt are protected from being damaged.

9. The accelerating motor is respectively connected with the two safety belt retractor mounting plates through two electromagnetic chucks at two ends, and the actions of the two 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, which is convenient for observation and plays a role in safety protection.

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. Therefore, 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 (13)

1. An automobile safety belt rewinding endurance test machine for testing a safety belt retractor comprises,

A frame;

The safety belt extraction 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 member, wherein the first guide rail is horizontally arranged, and the accelerating motor can enable the accelerating member to rapidly move on the first guide rail for a set distance;

The guide buffer device comprises a buffer device substrate, a first force sensor and a guide force measuring wheel, wherein the guide force measuring wheel is arranged on the buffer device substrate through the first force sensor, and the first force sensor is used for measuring the pressure value received by the guide force measuring wheel;

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

The safety belt extraction device, the guide buffer device, the accelerating device and the clamping device are sequentially arranged on the frame from top to bottom along the vertical direction;

the automobile safety belt rewinding endurance test machine further comprises a safety belt retractor mounting plate, wherein the safety belt retractor mounting plate for testing 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 the rack and is positioned 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 the safety belt in the safety belt retractor to be tested is wound on the guide buffer device upwards and then fixed on the take-up reel; when the seat belt retractor mounting plate is arranged on the frame and below the clamping device, the seat belt in the seat belt retractor is wound upwards after the clamping device and is fixed to the take-up reel upwards.

2. The car seat belt rewind endurance test machine of claim 1, wherein the guide buffer further comprises a guide assembly mounting plate, an upper guide wheel and a lower guide wheel, a horizontal groove is formed in the guide buffer, the guide assembly mounting plate can move along the horizontal groove, the first force sensor is mounted on the guide assembly 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 arranged on the buffer device substrate up and down in the vertical direction, the guide force measuring wheel is positioned 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 upwards bypasses the lower guide wheel, the guide force measuring wheel and the upper guide wheel in sequence and is then fixed on the take-up reel.

3. The car seat belt rewind endurance test machine of claim 2, wherein the guide buffer further comprises a third guide rail, a slider, and a first electromagnetic chuck, the first electromagnetic chuck is fixed on the guide assembly mounting plate, the guide assembly mounting plate is magnetically fixed on the buffer substrate through the first electromagnetic chuck, the third guide rail is horizontally disposed on the buffer substrate, the slider is fixedly disposed on the guide assembly mounting plate, the third guide rail is matched with the slider, and the guide assembly mounting plate can move along the horizontal groove in a power-off state of the first electromagnetic chuck.

4. The car seat belt rewind endurance test machine according to claim 3, wherein a guide pin is further provided on the buffer device substrate, the guide pin extends into the horizontal groove, a pin hole is provided on the guide assembly 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 assembly mounting plate, and the other end abuts against the inner wall of the horizontal groove.

5. The automotive seatbelt retractor durability test machine according to claim 1 wherein said seatbelt retractor is adjustable in its position on said seatbelt retractor mounting plate such that a webbing exit opening of said seatbelt retractor and a webbing take-up opening of said take-up spool are aligned in a vertical direction.

6. The automobile seat belt retractor durability test machine of claim 1 wherein the acceleration device further comprises a ball screw and a second electromagnetic chuck, the acceleration motor is in threaded engagement with the acceleration member through the ball screw, the second electromagnetic chuck is provided on one side of the acceleration member, and the acceleration member is attracted to the seat belt retractor mounting plate through the second electromagnetic chuck.

7. The car seat belt retractor durability test machine according to claim 6 wherein the second electromagnetic chuck is fixed to the acceleration member in a floating spherical manner, a circular plate is provided on one side of the seat belt retractor mounting plate opposite to the second electromagnetic chuck, and the second electromagnetic chuck is capable of being attracted and fixed to the circular plate in a conductive state.

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

9. The car seat belt rewind endurance test machine according to claim 1, wherein the clamping mechanism includes a clamp upper plate and a clamp lower plate, the clamp upper plate being movable in a horizontal direction to bring the clamp upper plate and the clamp lower plate toward and away from each other to clamp or release the seat belt interposed therebetween.

10. The car seat belt rewind endurance test machine of claim 9, wherein the clamp lower plate is slidably engaged with the second rail, and the seat belt pullout motor is connected to the clamp lower plate via a link mechanism, thereby driving the clamp mechanism to slide on the second rail.

11. The car seat belt rewind endurance test machine according to claim 10, wherein a plurality of clamping guide posts are provided on the clamping lower plate, corresponding mounting through holes are provided on the clamping upper plate, the clamping guide posts respectively pass through the corresponding through holes, a third electromagnetic chuck is further provided on the clamping lower plate, a third suction plate is provided on the clamping upper plate, and in the power-on state, the third electromagnetic chuck and the third suction plate are mutually magnetically attracted and fixed to clamp the seat belt.

12. The car seat belt rewind endurance testing machine of claim 11, wherein a second return spring is further sleeved on the clamping guide post, the second return spring being disposed between the clamping upper plate and the clamping lower plate, the second return spring being configured to push the clamping upper plate away from the clamping lower plate in a power-off state of the third electromagnetic chuck, so as to release the seat belt.

13. The automobile safety belt rewinding endurance test machine as claimed in claim 10, wherein two safety belt drawing devices and two clamping devices are arranged in parallel on the frame, one safety belt drawing motor is arranged between the two clamping devices, two sets of connecting rod mechanisms meshed through gears are respectively connected into clamping lower plates in the two clamping devices, and in operation, the safety belt drawing motor drives a clamping mechanism in one clamping device to ascend, and the clamping mechanism in the other clamping device to descend.