Safety belt tensile strength testing device

Abstract

The utility model relates to a testing device, in particular to a safety belt tensile strength testing device which comprises a machine base, a guide rail side frame installed on the machine base and a lifting plate arranged on the guide rail side frame. The stretching structure comprises a lower fixing base installed on the machine base and a first winding mechanism which rotates on the lower fixing base and is used for winding and fixing one end of the safety belt. In the process of detecting the tensile strength of the safety belt, the design of the tensile structure plays a crucial role, the design not only realizes convenient fixation of the safety belt, but also remarkably improves the stability and the reliability of the detection process, and specifically, the safety belt tensile strength detection device can be used for detecting the tensile strength of the safety belt. The two ends of the safety belt are clamped through the first winding mechanism and the second winding mechanism, so that the safety belt can be firmly fixed in place before detection, the fixing mode is simple and convenient to operate, and the problem of loosening of the safety belt can be effectively avoided in subsequent stretching detection.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of testing devices, specifically a safety belt tensile strength testing device. BACKGROUND

[0002] Safety belt is an important safety device in vehicle and other vehicles, usually composed of webbing, retractor, locking device, etc., it is a band on the seat of vehicle, one end is fixed on the structural member of vehicle, the other end is connected with the fixed point on seat through buckle device, when vehicle collision or emergency braking occurs, passenger can be firmly restrained on seat.

[0003] In the production process of safety belt, in order to ensure that it can meet strict safety standards, protect the life safety of user, testing the tensile strength of safety belt is a crucial link, at present, safety belt tensile strength testing device has certain limitation in actual application, which affects test efficiency and use convenience to some extent.

[0004] Specifically, the existing safety belt tensile strength testing device needs to fix both ends of safety belt on the clamp of device when using, this process needs careful operation of operator, to ensure that safety belt is firmly clamped in clamp, to ensure the accuracy and reliability of test, however, this fixing mode not only consumes time, but also is prone to clamping not firm or position deviation during fixing process, thereby affecting the accuracy of test result, in addition, after safety belt detection is completed, both ends of safety belt also need to be removed from clamp, this removal process also needs to consume certain time and energy, further increase the degree of operation complexity. TECHNICAL CONTENT

[0005] The utility model aims at providing a kind of safety belt tensile strength testing device to solve the problems raised in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A kind of safety belt tensile strength testing device, including machine base, guide rail side frame being installed on the machine base and lifting plate being set on the guide rail side frame, the machine base is provided with tensile structure, and the tensile structure includes:

[0008] Lower fixed base being installed on the machine base and first winding mechanism being rotated on the lower fixed base and winding the one end of safety belt, first worm is engaged on the first winding mechanism;

[0009] The upper fixing base is installed on the lifting plate, and a second winding mechanism for winding and fixing the other end of the safety belt is rotatably arranged on the upper fixing base.

[0010] The two ends of the second worm are rotatably attached with two sleeves, and the sleeves are fixed with limiting racks.

[0011] The limiting racks are installed on the upper fixing base, and the sleeves are slidably arranged on the transmission shaft.

[0012] The first winding mechanism and the second winding mechanism are identical in structure and each include two clamping columns, two ends of one of the clamping columns are fixed with guide blocks, two ends of the other clamping column are fixed with rotating columns, the rotating columns are slidably provided with guide grooves matched with the guide blocks, and worm wheels are fixed on the rotating columns.

[0013] One end of the transmission shaft is rotatably arranged on the guide rail side frame, and the other end is rotatably arranged on the lower fixing base, and the first worm is fixed on the transmission shaft.

[0014] The transmission shaft is vertically provided with a rotation-stopping groove, is provided with a spiral groove, and is provided with a straight groove connected between two ends of the spiral groove and on the transmission shaft.

[0015] The transmission mechanism includes a sleeve slidably arranged on the transmission shaft and fixed on the lifting plate, and a convex ball fixed on the inner wall of the sleeve.

[0016] The convex ball slidably abuts against the spiral groove and the straight groove.

[0017] The second worm is slidably arranged on the transmission shaft, and the inner wall of the second worm is slidably fixed with a rotation-stopping convex.

[0018] Compared with the prior art, the safety belt tensile strength testing device has the following beneficial effects:

[0019] In the process of safety belt tensile strength detection, the design of the stretching structure plays a crucial role. This design not only achieves convenient fixation of the safety belt, but also significantly improves the stability and reliability of the detection process. Specifically, by clamping the two ends of the safety belt with the first and second winding mechanisms, the safety belt can be firmly fixed in place before detection. This fixing method is not only simple to operate, but also effectively prevents the safety belt from loosening during subsequent stretching detection.

[0020] When the first and second winding mechanisms start to rotate, the safety belt is gradually wound and fixed. This process not only ensures the stability of the safety belt during detection, but also improves the accuracy of the detection. Since the safety belt is firmly fixed on the winding mechanism, there is no accidental loosening or slipping during detection, ensuring the reliability and repeatability of the detection results. Another significant advantage of this design is its efficiency. Through the optimization of the stretching structure, the operator can quickly complete the fixation and removal of the safety belt, greatly improving the detection efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Structure diagram of safety belt tensile strength testing device.

[0022] Figure 2 Structure diagram of the base of the safety belt tensile strength testing device.

[0023] Figure 3 Structure diagram of the guide rail side frame of the safety belt tensile strength testing device.

[0024] Figure 4 Structure diagram of the first winding mechanism of the safety belt tensile strength testing device.

[0025] Figure 5 Structure diagram of the first winding mechanism of the safety belt tensile strength testing device.

[0026] Figure 6 Structure diagram of the transmission shaft of the safety belt tensile strength testing device.

[0027] Figure 7 Structure diagram of the transmission mechanism of the safety belt tensile strength testing device.

[0028] Figure 8 Structure diagram of the second winding mechanism of the safety belt tensile strength testing device.

[0029] Figure 9 Structure diagram of the second worm of the safety belt tensile strength testing device.

[0030] In the figure: 1, base; 2, guide rail side frame; 3, lifting plate; 4, lower fixing seat; 5, clamping column; 6, guide block; 7, rotating column; 8, guide groove; 9, worm; 10, first worm; 11, transmission shaft; 12, rotation stopping groove; 13, helical groove; 14, straight groove; 15, sleeve; 16, convex ball; 17, upper fixing seat; 18, limiting frame; 19, sleeve ring; 20, second worm; 21, rotation stopping convex. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0032] Please refer to Figures 1-3 In the embodiments of the utility model, a safety belt tensile strength testing device comprises a base 1, a guide rail side frame 2 mounted on the base 1 and a lifting plate 3 arranged on the guide rail side frame 2, and a tensile structure is arranged on the base 1, wherein the tensile structure comprises:

[0033] A lower fixing seat 4 mounted on the base 1 and a first winding mechanism rotating on the lower fixing seat 4 and winding and fixing one end of the safety belt, and a first worm 10 is engaged on the first winding mechanism;

[0034] An upper fixing seat 17 mounted on the lifting plate 3 and a second winding mechanism rotating on the upper fixing seat 17 and winding and fixing the other end of the safety belt, a second worm 20 is engaged on the second winding mechanism, a transmission shaft 11 is connected between the second worm 20 and the first worm 10, the transmission shaft 11 is connected with a transmission mechanism on the lifting plate 3, when the lifting plate 3 is adjusted to ascend and descend, the transmission shaft 11 is driven to rotate through the transmission mechanism, and then the first winding mechanism and the second winding mechanism control winding and fixing of the two ends of the safety belt.

[0035] In this embodiment, during the safety belt tensile strength detection, first, the two ends of the safety belt are fixed on the first winding mechanism and the second winding mechanism respectively, and this fixing mode provides a stable basis for subsequent tensile test, with the start of the detection process, the lifting plate 3 starts to perform the lifting action, the transmission mechanism is arranged on the lifting plate 3, the transmission mechanism can drive the rotation of the transmission shaft 11 when the lifting plate 3 rises, the rotation of the transmission shaft 11 further drives the rotation of the second worm 20 and the first worm 10 connected therewith, because the first winding mechanism and the first worm 10 have the engagement relationship, and the second winding mechanism and the second worm 20 also have the engagement relationship, therefore, when the transmission shaft 11 rotates, the first winding mechanism and the second winding mechanism can realize synchronous rotation;

[0036] The synchronous rotating mechanism enables the two ends of the safety belt to be uniformly and stably wound, and when the safety belt is subjected to tensile strength detection, the fixing effect of the safety belt becomes more firm as the tensile force gradually increases, ensuring that the end of the safety belt is still stable and reliable when subjected to a larger tensile force, thereby effectively avoiding the problem of safety belt loosening due to poor fixing.

[0037] Please refer to Figure 3 、 Figure 8 and Figure 9 , as a further scheme of the present application, two collars 19 are rotatably attached to the two ends of the second worm 20, and a limiting frame 18 is fixed on the collar 19.

[0038] The limiting frame 18 is installed on the upper fixed seat 17, and the collar 19 is slidably sleeved on the transmission shaft 11.

[0039] In this embodiment, the upper fixed seat 17 is installed on the lifting plate 3, which plays a role of stable support, and the limiting frame 18 is installed on the upper fixed seat 17, so when the lifting plate 3 performs lifting action, due to the correlation of the structure, the limiting frame 18 can realize synchronous action with the lifting plate 3,

[0040] Further, two collars 19 are fixed on the limiting frame 18, and the second worm 20 is rotatably attached between the two collars 19, so that the second worm 20 can be synchronously lifted and lowered when the lifting plate 3 is adjusted.

[0041] Please refer to Figure 5 and Figure 8 , as a further scheme of the present application, the first winding mechanism and the second winding mechanism are structurally identical, each comprising two clamping columns 5, two ends of one of the clamping columns 5 being fixed with a guide block 6, two ends of the other clamping column 5 being fixed with a rotating column 7, a guide groove 8 being slidably provided on the rotating column 7 in cooperation with the guide block 6, and a worm 9 being fixed on the rotating column 7.

[0042] In the embodiment, the two rotating columns 7 of the first winding mechanism and the second winding mechanism are respectively installed on the lower fixed seat 4 and the upper fixed seat 17, the two clamping columns 5 are combined into a cylindrical structure, in the initial state of the device, the clamping column 5 with the guide block 6 is located at the upper side, and the clamping column 5 fixed with the rotating column 7 is located at the lower side, the guide block 6 can freely slide in the guide groove 8, and the sliding mechanism provides accurate guidance for the movement of the clamping column 5, under the action of gravity, the clamping column 5 at the upper side can naturally slide downward, when it is necessary to fix the safety belt, only the end of the safety belt is placed between the two clamping columns 5, and under the action of gravity, the clamping column 5 at the upper side moves downward, so that the end of the safety belt is clamped between the two clamping columns 5;

[0043] The first worm 10 and the second worm 20 arranged on the transmission shaft 11 can be engaged with the worm gears 9 on the first winding mechanism and the second winding mechanism, when the transmission shaft 11 rotates, the first winding mechanism and the second winding mechanism can rotate synchronously through the engagement transmission of the worm gears 9 and the worms, so that the winding and fixing of the safety belt are realized, in the winding process, the safety belt is wound on the combined rollers of the two clamping columns 5, and the design not only ensures the stability of the safety belt in the winding process, but also provides a reliable fixing basis for subsequent stretching detection;

[0044] In the subsequent stretching detection process, the safety belt will be subjected to a certain tension, the tension will make the two clamping columns 5 close to each other, and the fixing effect of the two clamping columns 5 on the safety belt is further enhanced, the self-enhancing clamping mechanism not only improves the stability of the safety belt in the detection process, but also ensures the accuracy and reliability of the detection result.

[0045] Please refer to Figure 3 、 Figure 4 and Figure 6 , as a further scheme of the utility model, one end of the transmission shaft 11 rotates on the guide rail side frame 2, the other end rotates on the lower fixed seat 4, and the first worm 10 is fixed on the transmission shaft 11.

[0046] A rotation stopping groove 12 is vertically arranged on the transmission shaft 11, a spiral groove 13 and a straight groove 14 connected to both ends of the spiral groove 13 and arranged on the transmission shaft 11 are arranged on the transmission shaft 11.

[0047] In this embodiment, the transmission shaft 11 is installed between the base 1 and the guide side frame 2, such a layout ensures that the transmission shaft 11 can keep a stable and accurate movement track during operation, at the same time, the transmission shaft 11 is closely connected with the transmission mechanism arranged on the lifting plate 3, when the lifting plate 3 performs the lifting action, the transmission mechanism on it starts to work, it can convert the vertical movement of the lifting plate 3 into the rotary movement of the transmission shaft 11, specifically, with the lifting or lowering of the lifting plate 3, the transmission mechanism drives the transmission shaft 11 to rotate between the base 1 and the guide side frame 2.

[0048] Please refer to Figure 6 and Figure 7 , as a further scheme of the present application, the transmission mechanism comprises a sleeve 15 which is sleeved on the transmission shaft 11 and is fixed on the lifting plate 3, and a convex ball 16 which is fixed on the inner wall of the sleeve 15.

[0049] The convex ball 16 is in sliding abutment with the spiral groove 13 and the straight groove 14.

[0050] In this embodiment, the sleeve 15 is sleeved on the transmission shaft 11, the inner wall of the sleeve 15 is fixed with the convex ball 16, and the transmission shaft 11 is provided with the spiral groove 13 and the straight groove 14, since the sleeve 15 is fixed on the lifting plate 3, when the lifting plate 3 is adjusted in lifting, the sleeve 15 will move synchronously, at this time, the convex ball 16 will abut against the spiral groove 13 or the straight groove 14 on the transmission shaft 11, and this abutment relationship is the core mechanism for realizing movement conversion.

[0051] When the convex ball 16 abuts against the part of the spiral groove 13, the vertical lifting movement of the lifting plate 3 will be converted into the rotary movement of the transmission shaft 11, and this conversion is realized through the slope design of the spiral groove 13, when the convex ball 16 slides along the spiral groove 13, it will push the transmission shaft 11 to rotate, this design not only realizes the conversion of movement form, but also ensures the stability and accuracy of the transmission process, on the contrary, when the convex ball 16 abuts against the part of the straight groove 14, the transmission shaft 11 will keep a locked state during the lifting of the lifting plate 3, the design of the straight groove 14 ensures that the convex ball 16 will not generate a rotary torque when it slides in the straight groove 14, thereby ensuring that the transmission shaft 11 can be stably locked when it needs to keep still.

[0052] Please refer to Figure 3 and Figure 9 , as a further scheme of the present application, the second worm 20 is sleeved on the transmission shaft 11, and a rotation-stopping convex 21 is fixed on the inner wall of the second worm 20 in cooperation with the rotation-stopping groove 12.

[0053] In the embodiment, the inner wall of the second worm 20 is provided with a rotation stopping protrusion 21, and the transmission shaft 11 is correspondingly provided with a rotation stopping groove 12, so that the rotation stopping protrusion 21 and the rotation stopping groove 12 are in sliding connection, which is very crucial, and ensures that the second worm 20 can only slide on the transmission shaft 11 and cannot rotate by itself. When the transmission shaft 11 starts to rotate, the second worm 20 is driven to rotate synchronously due to the sliding connection between the rotation stopping protrusion 21 and the rotation stopping groove 12, so that the movement of the second worm 20 is closely connected with the movement of the transmission shaft 11. The second worm 20 and the worm wheel 9 on the second winding mechanism are in meshing relationship, so that the second winding mechanism can be driven to wind when the second worm 20 rotates.

[0054] It is worth noting that the screw directions of the first worm 10 and the second worm 20 on the same transmission shaft 11 are opposite, which is of great significance. It ensures that the first winding mechanism and the second winding mechanism can wind the two ends of the safety belt in opposite directions when the transmission shaft 11 rotates. This opposite winding method not only improves the winding efficiency, but also enhances the stability of winding, so that the safety belt can be wound more uniformly on the winding mechanism during winding. Through the self-locking effect of the worm and the gear, the safety belt can be prevented from loosening during the tensile strength test of the safety belt winding.

[0055] In addition, the two transmission shafts 11, the first worm 10 and the second worm 20 on the first winding mechanism and the second winding mechanism are symmetrically arranged, which not only makes the whole device more balanced in structure, but also ensures that the lifting plate 3 can be used in linkage during lifting. This linkage mechanism makes the whole device more coordinated during operation.

[0056] The above embodiments are exemplary and not restrictive, so that the technical solutions of the present application can be realized in other specific forms without departing from the spirit or basic characteristics of the present application.

Claims

1. A seat belt tensile strength testing device comprising a base (1), a guide rail side frame (2) mounted on the base (1), and a lifting plate (3) provided on the guide rail side frame (2), characterized in that, The base (1) is provided with a stretching structure, which comprises: A lower fixed seat (4) mounted on the base (1) and a first winding mechanism rotating on the lower fixed seat (4) for winding and fixing one end of the safety belt, the first winding mechanism is engaged with a first worm (10); An upper fixed seat (17) mounted on the lifting plate (3) and a second winding mechanism rotating on the upper fixed seat (17) for winding and fixing the other end of the safety belt, the second winding mechanism is engaged with a second worm (20), the second worm (20) and the first worm (10) are connected by a transmission shaft (11), the transmission shaft (11) is connected with a transmission mechanism on the lifting plate (3), when the lifting plate (3) is adjusted up and down, the transmission shaft (11) is driven to rotate through the transmission mechanism, thereby controlling the first winding mechanism and the second winding mechanism to wind and fix both ends of the safety belt.

2. A seat belt tensile strength testing apparatus according to claim 1, wherein, Both ends of the second worm (20) are rotatably attached to two collars (19), the collars (19) are fixed with limit racks (18).

3. A seat belt tensile strength testing apparatus according to claim 2, wherein, The limit racks (18) are mounted on the upper fixed seat (17), and the collars (19) are slidably sleeved on the transmission shaft (11).

4. The seat belt tensile strength testing apparatus of claim 1, wherein, The first winding mechanism and the second winding mechanism are the same structure, both comprising two clamping columns (5), both ends of one of the clamping columns (5) are fixed with guide blocks (6), both ends of the other clamping column (5) are fixed with rotating columns (7), the rotating columns (7) are slidably provided with guide grooves (8) matched with the guide blocks (6), and worm wheels (9) are fixed on the rotating columns (7).

5. The seat belt tensile strength testing apparatus of claim 1, wherein, One end of the transmission shaft (11) is rotatably attached to the guide rail side frame (2), and the other end is rotatably attached to the lower fixed seat (4), and the first worm (10) is fixed on the transmission shaft (11).

6. A seat belt tensile strength testing apparatus as defined in claim 1, wherein, A rotation stopping groove (12) is vertically formed on the transmission shaft (11), a spiral groove (13) is formed on the transmission shaft (11), and a straight groove (14) is formed on the transmission shaft (11) and connected between both ends of the spiral groove (13).

7. A seat belt tensile strength testing apparatus as defined in claim 6, wherein The transmission mechanism comprises a sleeve (15) slidably sleeved on the transmission shaft (11) and fixed on the lifting plate (3), and a convex ball (16) fixed on the inner wall of the sleeve (15); The convex ball (16) is slidably connected with the spiral groove (13) and the straight groove (14).

8. A seat belt tensile strength testing apparatus according to claim 7, wherein The second worm (20) is slidably sleeved on the transmission shaft (11), and a rotation stopping protrusion (21) is slidably fixed on the inner wall of the second worm (20) and matched with the rotation stopping groove (12).

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