Tensioner strength testing system and method

Abstract

The present invention relates to the technical field of tensioner testing, and more specifically, to a tensioner strength testing system and method. It includes an active component and a driven component. In the present invention, the tensioner to be tested is mounted on a fixed plate, and the motor drives the central coupling shaft to rotate. When the central coupling shaft drives the driving wheel to rotate, it also drives the first roller to rotate, and then drives the second roller to rotate. When the second roller rotates, it drives the driven plate to move, that is, the central coupling shaft drives the driving wheel to rotate on one side, so that the driving wheel drives the driven wheel to rotate through the belt, and the central coupling shaft drives the driven plate to move along the screw shaft on the other side, changing the center distance between the driving wheel and the belt, thereby changing the tightness of the belt, and testing the tensioning strength of the tensioner. When the belt slides relative to the driving wheel or the driven wheel, it means that the tensioning strength of the tensioner is insufficient to maintain the tautness of the belt. The present invention directly tests the tensioner as a whole, which can ensure that the test results of the tensioning strength of the tensioner are accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of tensioner testing, and in particular to a tensioner strength testing system and method. Background Art

[0002] The tensioner is a belt tensioning device used in automobile transmission systems. Its main function is to adjust the tightness of the belt to ensure that the timing belt maintains the optimal tension during long-term use or temperature changes, thereby avoiding slipping or breakage and ensuring the normal operation of the engine.

[0003] The two lever of the upper right corner is connected with the up-down knob of the second end in pinion link fence, and the two link fences are connected with each other with a up-down knob.

[0004] In order to test the tensioner pulley as a whole and ensure the accuracy of the test results, a tensioner pulley strength testing system and method are proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a tensioner strength testing system and method to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, one of the objectives of the present invention is to provide a tensioner strength testing system, comprising an active component and a driven component disposed on the active component;

[0007] The active component includes a test bench and a motor, a coupling structure, a tensioner, and a driving body arranged on the test bench. The motor is in transmission connection with the coupling structure, and the coupling structure is used to drive the driving body to rotate.

[0008] The driven assembly includes a driven plate slidably connected to the test bench and a displacement control structure for controlling the movement of the driven plate. A driven wheel is rotatably connected to the driven plate, and a belt is provided on the driven wheel. The other end of the belt is connected to the driving body through the tensioner pulley. The displacement control structure is connected to one end of the coupling structure. The coupling structure drives the driving body to rotate on one side, and then drives the driving body to rotate the driven wheel through the belt. The other side of the coupling structure drives the driven plate to move through the displacement control structure, thereby changing the distance between the driving body and the driven plate.

[0009] As a further improvement of the present technical solution, a fixed plate is provided on the test bench near one end of the motor, the driving body includes a driving wheel rotatably connected to the fixed plate, the other end of the belt is sleeved on the driving wheel, a displacement groove is provided on the surface of the test bench away from the end of the motor, the driven plate is located in the displacement groove and is horizontally slidably connected to the displacement groove, the tensioning wheel includes a fixed arm fixed to the top of the fixed plate, a movable arm is hinged at one end of the bottom of the fixed arm, an elastic body is hinged at one end of the fixed arm away from the driving wheel, the elastic body is connected to the surface of one end of the movable arm, and one end of the movable arm is rotatably connected to a pressure wheel for tightening the belt.

[0010] As a further improvement of the present technical solution, the fixed plate and the driven plate are both provided with two pairs of limiting wheels, and the belt passes through the limiting wheels.

[0011] As a further improvement of the present technical solution, the coupling structure includes a central coupling shaft rotatably connected to the top of the test bench, the central coupling shaft is engaged with the driving wheel, a coupling is provided at one end of the central coupling shaft, the central coupling shaft is connected to the motor transmission through the provided coupling, and a clamping shaft is provided at the other end of the central coupling shaft, the central coupling shaft is connected to the displacement control structure through the provided clamping shaft.

[0012] As a further improvement of the present technical solution, the displacement control structure includes a control body and a locking body arranged on the driven plate, an opposing frame is provided on the driven plate, a screw shaft is provided on the test bench at the bottom end of the clamping shaft, the control body includes a first roller and a second roller rotatably connected to the opposing frame, the first roller is meshed with the second roller, the clamping shaft is clamped with the inner wall of the first roller, and the screw shaft is threadedly connected to the inner wall of the second roller.

[0013] As a further improvement of the present technical solution, the first roller is a hollow cylinder as a whole, a single tooth is provided on the surface of the first roller, and the second roller is a hollow cylinder with a plurality of tooth-like grooves on the outer surface, and the single tooth engages with the tooth-like grooves.

[0014] As a further improvement of the present technical solution, the locking body includes an end sleeve plate arranged at one end of the driven plate and a top sleeve shell connected to the top of the end sleeve plate, a third roller is provided in the top sleeve shell, the third roller is a hollow cylinder with a recessed outer wall, one end of the clamping shaft passes through the middle of the third roller and is engaged with the third roller, a lifting plate sliding up and down is provided in the end sleeve plate, a return spring is provided at the top bottom of the lifting plate, the lifting plate is connected to the inner wall of the end sleeve plate through the provided return spring, the top of the lifting plate contacts the outer wall of the third roller, the bottom end of the lifting plate is provided with a latching tooth, a tooth groove is correspondingly opened in the displacement groove, and the latching tooth contacts the tooth groove.

[0015] As a further improvement of the present technical solution, a reference groove is provided on the surface of the driven wheel, and a plurality of reference lines are correspondingly provided on the surface of the belt. The spacing between adjacent reference lines on the belt surface is the circumference of the driven wheel, and one of the reference lines is aligned with the reference groove.

[0016] A second object of the present invention is to provide a method for testing a tensioner pulley strength test system using the aforementioned method, the specific steps of which are as follows:

[0017] S1. Install and fix the tensioner to be tested on the top of the fixed plate, and make the pressure pulley of the tensioner contact the belt;

[0018] S2, the motor drives the middle coupling shaft to rotate through the coupling, and when the middle coupling shaft rotates, it drives the driving wheel meshed with the middle coupling shaft to rotate, and then drives the driving wheel to rotate the driven wheel through the belt;

[0019] S3, the middle coupling shaft drives the driven plate to move along the screw shaft, changing the center distance between the driving wheel and the belt to change the tightness of the belt;

[0020] S4. Observe the distance between the reference line and the reference groove. When the distance between the reference line and the reference groove is between 0 and the circumference of the driven pulley, it means that the tensioning strength of the tensioner on the belt is insufficient to keep the belt taut.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the tensioner pulley strength testing system and method, the tensioner pulley to be tested is installed and fixed on a fixed plate, the motor drives the central coupling shaft to rotate, and when the central coupling shaft drives the driving pulley to rotate, it also drives the first roller to rotate, and then drives the second roller to rotate. When the second roller rotates, it drives the driven plate to move along the screw shaft, that is, one side of the central coupling shaft drives the driving pulley to rotate, so that the driving pulley drives the driven pulley to rotate through the belt, and the other side of the central coupling shaft drives the driven plate to move along the screw shaft, changing the center distance between the driving pulley and the belt, thereby changing the tightness of the belt, and testing the tensioning strength of the tensioner pulley. When the belt slides relative to the driving pulley or the driven pulley, it indicates that the tensioning strength of the tensioner pulley is insufficient to maintain the tautness of the belt. The present invention directly tests the tensioner pulley as a whole, which can ensure that the test results of the tensioner pulley tensioning strength are accurate.

[0023] 2. In the tensioner pulley strength testing system and method, when the clamping shaft drives the first roller so that the single tooth is about to contact the tooth-shaped groove of the second roller, the clamping shaft drives the third roller to rotate so that the top of the lifting plate moves along the outer wall of the third roller to the recessed part of the outer wall of the third roller. Under the elastic force of the reset spring, the lifting plate moves up and drives the clamping tooth to move up and out of the tooth groove, thereby facilitating the contact between the single tooth and the tooth-shaped groove and driving the driven plate to move. When the single tooth does not contact the tooth-shaped groove of the second roller, the driven plate will not move, thereby facilitating the determination of the optimal working range of the tensioner pulley. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a left view of the active component structure of the present invention;

[0026] Figure 3 This is a right side view of the active component structure of the present invention;

[0027] Figure 4 It is a left view of the driven component structure of the present invention;

[0028] Figure 5 It is a right side view of the driven assembly structure of the present invention;

[0029] Figure 6 for Figure 4 A schematic diagram of the structure at center A;

[0030] Figure 7 This is a cross-sectional structural diagram of the control body of the present invention;

[0031] Figure 8 This is a cross-sectional structural diagram of the locking body of the present invention;

[0032] Figure 9 This is a left view of the device of the present invention in a testing state;

[0033] Figure 10 It is a right view of the device of the present invention in the testing state.

[0034] The meaning of each number in the figure is:

[0035] 1. Active component; 11. Test bench; 111. Fixed plate; 1111. Active pulley; 112. Displacement slot; 1121. Tooth groove; 12. Motor; 13. Center coupling; 131. Coupling; 132. Clamping shaft; 133. Screw shaft; 14. Fixed arm; 15. Movable arm; 16. Elastic body; 17. Pinch roller;

[0036] 2. Driven assembly; 21. Driven plate; 211. Driven pulley; 2111. Reference groove; 212. Belt; 2121. Reference line; 213. Opposing frame; 22. Control body; 221. First roller; 222. Second roller; 223. Single tooth; 23. Locking body; 231. End sleeve; 232. Top sleeve; 233. Third roller; 234. Lifting plate; 235. Gear. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0040] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 As shown, one of the purposes of this embodiment is to provide a tensioner strength testing system, comprising an active component 1 and a driven component 2 disposed on the active component 1;

[0041] The active component 1 includes a test bench 11 and a motor 12, a coupling structure, a tensioner, and a driving body arranged on the test bench 11. The motor 12 is connected to the coupling structure in a transmission manner, and the coupling structure is used to drive the driving body to rotate.

[0042] The driven assembly 2 includes a driven plate 21 that is slidably connected to the test bench 11 and a displacement control structure for controlling the movement of the driven plate 21. A driven wheel 211 is rotatably connected to the driven plate 21, and a belt 212 is sleeved on the driven wheel 211. The other end of the belt 212 is connected to the driving body through a tensioner. The displacement control structure is connected to one end of the coupling structure. Under the drive of the motor 12, the coupling structure drives the driving body to rotate on one side, so that the driving body drives the driven wheel 211 to rotate through the belt 212, and the other side of the coupling structure drives the displacement control structure to drive the driven plate 21 to move, changing the distance between the driving body and the driven plate 21 to adjust the tightness of the belt 212. When the belt 212 is loose, the tensioner will tighten the belt 212 to ensure that there is a gap between the driving body, the driven wheel 211 and the belt 212. There is sufficient friction so that when the driving body rotates, the driven pulley 211 can be driven to rotate through the belt 212. That is, when the tensioner has sufficient tensioning strength, when the tightness of the belt 212 changes, the tensioner can tighten the belt 212 so that there is sufficient friction between the belt 212 and the driving body and the driven pulley 211. When the driving body rotates, the driven pulley 211 is driven to rotate through the belt 212. When the tensioning strength of the tensioner is insufficient, the belt 212 is not fully tightened, so that the friction between the belt 212 and the driving body and the driven pulley 211 is insufficient, which causes the belt 212 to slip relative to the driving body and the driven pulley 211. In short, the tensioning strength of the tensioner is detected by observing whether the belt 212 slips during the test.

[0043] The above structure is disclosed below:

[0044] like Figure 2 、 Figure 3 、 Figure 4, a fixed plate 111 is provided on the test bench 11 near one end of the motor 12, the driving body includes a driving wheel 1111 rotatably connected to the fixed plate 111, and the other end of the belt 212 is sleeved on the driving wheel 1111. A displacement groove 112 is provided on the upper surface of the test bench 11 away from the motor 12. The driven plate 21 is located in the displacement groove 112 and is horizontally slidably connected to the displacement groove 112. The tensioner includes a fixed arm 14 fixed to the top of the fixed plate 111. There are many ways to fix the fixed arm 14 on the test bench 11. In this embodiment, bolt fixation is used as an example. A movable arm 15 is hinged at one end of the bottom of the fixed arm 14, and an elastic body is hinged at one end of the fixed arm 14 away from the driving wheel 1111. 16. The elastic body 16 is connected to the surface of one end of the movable arm 15. One end of the movable arm 15 is rotatably connected to a pressure roller 17 for tightening the belt 212. When the belt 212 is tightened, the rotation of the driving wheel 1111 will drive the rotation of the driven wheel 211, and then the driven plate 21 is slid in the displacement groove 112, so that the belt 212 is close to the driving wheel 1111 to shorten the center distance between the driving wheel 1111 and the driven wheel 211, so that the belt 212 is loosened. Under the elastic force of the elastic body 16, the movable arm 15 rotates with the connection between the movable arm 15 and the fixed arm 14 as the axis, driving the pressure roller 17 to press down the belt 212 so that the belt 212 is in a tightened state.

[0045] First, when the center distance between the driving pulley 1111 and the driven pulley 211 is reduced, and the tensioner pulley tightens the belt 212, the downward pressure of the tensioner pulley on the belt 212 will tighten the belt, resulting in an increase in the contact area between the belt 212 and the driving pulley 1111 or the driven pulley 211, which will cause additional variables to appear in the test process, which is not conducive to the test of the strength of the tensioner pulley. In order to reduce the changes of other variables in the test process and ensure the accuracy of the test results, two pairs of limiting wheels are provided on the fixed plate 111 and the driven plate 21, and the belt 212 passes through the limiting wheels. By providing the limiting wheels, when the tensioner pulley tightens the belt 212, the belt 212 only bends from the limiting wheels, and the contact area between the belt 212 and the driving pulley 1111 and the driven pulley 211 remains unchanged, thereby avoiding other variables in the test process and ensuring the accuracy of the test structure.

[0046] After the tensioner to be tested and the driven plate 21 are set to their initial positions in the displacement slot 112 on the device, in order to drive the driving wheel 1111 to rotate and start the strength test of the tensioner, as shown in FIG. Figure 2 、 Figure 3As shown, the coupling structure includes a central coupling shaft 13 rotatably connected to the top of the test bench 11, the central coupling shaft 13 is meshed with the driving wheel 1111, a coupling 131 is provided at one end of the central coupling shaft 13, the central coupling shaft 13 is transmission-connected to the motor 12 through the provided coupling 131, and a clamping shaft 132 is provided at the other end of the central coupling shaft 13, the central coupling shaft 13 is connected to the displacement control structure through the provided clamping shaft 132, the motor 12 drives the central coupling shaft 13 to rotate through the coupling 131, and when the central coupling shaft 13 rotates, it drives the driving wheel 1111 meshed with the central coupling shaft 13 to rotate, so that the driving wheel 1111 drives the driven wheel 211 to rotate through the belt 212, and the central coupling shaft 13 drives the displacement control structure, thereby driving the driven plate 21 to move in the displacement groove 112 to change the center distance between the driving wheel 1111 and the driven wheel 211, and change the tightness of the belt 212 to test the tensioning strength of the tensioner on the belt 212.

[0047] The above displacement control structure is disclosed below. Figure 3 、 Figure 4 、 Figure 5 As shown, the displacement control structure includes a control body 22 and a locking body 23 provided on the driven plate 21.

[0048] Specifically, such as Figure 7 As shown, an opposing frame 213 is provided on the driven plate 21, and a screw shaft 133 is provided at the bottom end of the card shaft 132 on the test bench 11. The control body 22 includes a first roller 221 and a second roller 222 that are rotatably connected to the opposing frame 213. The first roller 221 is meshed with the second roller 222. A groove is provided on the surface of the card shaft 132, and a first protrusion is correspondingly provided on the inner wall of the first roller 221. The first protrusion is located in the groove and is slidably connected to the groove. One end of the card shaft 132 passes through the first roller 221 and is engaged with the inner wall of the first roller 221. One end of the screw shaft 133 passes through the middle of the second roller 222 and is threadedly connected to the inner wall of the second roller 222. The middle joint shaft 13 is at When the driving wheel 1111 engaged with the central coupling shaft 13 is driven to rotate, the central coupling shaft 13 drives the first roller 221 to rotate through the clamping shaft 132, and then drives the meshed second roller 222 to rotate through the first roller 221. Since the second roller 222 is threadedly connected to the screw shaft 133, and the screw shaft 133 is fixedly set on the test bench 11, the second roller 222 can drive the driven plate 21 to move along the screw shaft 133 when it rotates. That is, the central coupling shaft 13 drives the driving wheel 1111 to rotate on one side, so that the driving wheel 1111 drives the driven wheel 211 to rotate through the belt 212, and the central coupling shaft 13 drives the driven plate 21 to move along the screw shaft 133 on the other side. Figure 9 、 Figure 10As shown by the middle arrow a, the center distance between the driving pulley 1111 and the belt 212 is changed to change the tightness of the belt 212, and the tensioning strength of the tensioner is tested. When the belt 212 slides relative to the driving pulley 1111 or the driven pulley 211, it means that the tensioning strength of the tensioner is insufficient to maintain the tautness of the belt 212.

[0049] It is worth noting that in order to determine the optimal working range of the tensioner, that is, when the tensioning strength of the tensioner is sufficient to maintain the tension of the belt 212, the center distance variation range between the driving wheel 1111 and the driven wheel 211 or the tightness variation range of the belt 212, the first roller 221 is a hollow cylinder as a whole, and a single tooth 223 is provided on the surface of the first roller 221. The second roller 222 is a hollow cylinder with a plurality of tooth-like grooves on the outer surface. The single tooth 223 meshes with the tooth-like grooves. By providing only one single tooth 223 on the surface of the first roller 221, the first roller 221 is provided with a plurality of tooth-like grooves. In a complete cycle, only when the single tooth 223 contacts the tooth-shaped groove of the second roller 222, the first roller 221 will drive the second roller 222 to rotate, and then drive the movement of the driven plate 21. That is, the driven plate 21 will remain in a stopped state for a long time after moving to change the center distance between the driving wheel 1111 and the driven wheel 211 or the tightness of the belt 212, so as to facilitate testing whether the tensioning strength of the tensioner can maintain the tension of the belt 212 when the center distance between the driving wheel 1111 and the driven wheel 211 is different or the tightness of the belt 212 is different, which is conducive to determining the optimal working range of the tensioner.

[0050] When determining the optimal working range of the tensioner, when the driving wheel 1111 drives the driven wheel 211 to rotate through the belt 212, the driven wheel 211 will be subjected to a force toward the driving wheel 1111, resulting in that when the single tooth 223 does not contact the tooth-shaped groove of the second roller 222, the driven plate 21 will still move, thereby affecting the determination of the optimal working range of the tensioner. In order to avoid this situation, as shown in FIG. Figure 8As shown, the locking body 23 includes an end sleeve 231 provided at one end of the driven plate 21 and a top sleeve shell 232 connected to the top of the end sleeve 231. A third roller 233 is provided in the top sleeve shell 232. The third roller 233 is a hollow cylinder with a depression on the outer wall. A second protrusion is correspondingly provided on the inner wall of the third roller 233. The second protrusion is located in the groove and is slidably connected to the groove. One end of the clamping shaft 132 passes through the middle of the third roller 233 and is engaged with the third roller 233. The screw shaft 1 33 passes through the end sleeve 231, and a lifting plate 234 is provided in the end sleeve 231 to slide up and down. A reset spring is provided at the bottom of the top of the lifting plate 234. The lifting plate 234 is connected to the inner wall of the end sleeve 231 through the reset spring. The top of the lifting plate 234 contacts the outer wall of the third roller 233. A locking tooth 235 is provided at the bottom of the lifting plate 234. A tooth groove 1121 is correspondingly opened in the displacement groove 112. The locking tooth 235 contacts the tooth groove 1121. When the card shaft 132 When the first roller 221 is driven so that the single tooth 223 of the first roller 221 is about to contact the tooth-shaped groove of the second roller 222, the clamping shaft 132 drives the third roller 233 to rotate so that the top of the lifting plate 234 moves along the outer wall of the third roller 233 to the recessed part of the outer wall of the third roller 233. Under the elastic force of the return spring, the lifting plate 234 moves upward and drives the clamping tooth 235 to move upward and out of the tooth groove 1121, thereby making it easier for the single tooth 223 to contact the tooth-shaped groove and drive the driven When the plate 21 moves, when the single tooth 223 is not in contact with the tooth-shaped groove, the top end of the lifting plate 234 just leaves the recess of the third roller 233, so that the lifting plate 234 overcomes the elastic force of the return spring and moves down along the end sleeve plate 231, and the locking tooth 235 is locked in the tooth groove 1121, so that the driven plate 21 is fixed and cannot move, that is, when the single tooth 223 is not in contact with the tooth-shaped groove of the second roller 222, the driven plate 21 will not move, thereby facilitating the determination of the optimal working range of the tensioner.

[0051] Furthermore, in order to conveniently observe whether the belt 212 generates relative sliding when the driving wheel 1111 drives the driven wheel 211 to rotate through the belt 212, Figure 4 、 Figure 6As shown, a reference groove 2111 is opened on the surface of the driven wheel 211, and a plurality of reference lines 2121 are opened on the surface of the belt 212. The distance between adjacent reference lines 2121 on the surface of the belt 212 is the circumference value of the driven wheel 211, and one of the reference lines 2121 is aligned with the reference groove 2111. During the test, by detecting the distance between the reference line 2121 and the reference groove 2111, it can be determined whether the belt 212 has a relative slip with the driven wheel 211, and the judgment standard is whether the belt 212 has a relative slip with the driven wheel 211. Select the reference line 2121 closest to the reference groove 2111. When the distance between the reference line 2121 and the reference groove 2111 is 0 or a multiple of the circumference of the driven wheel 211, it means that the belt 212 does not slide relative to the driven wheel 211. When the distance between the reference line 2121 and the reference groove 2111 is in the range of 0 to the circumference of the driven wheel 211, the belt 212 slides relative to the driven wheel 211, indicating that the tensioning strength of the tensioning wheel on the belt 212 is insufficient to maintain the tautness of the belt 212.

[0052] A second purpose of this embodiment is to provide a method for testing the tensioner strength test system described above, the specific steps of which are as follows:

[0053] S1. Install and fix the tensioner to be tested on the top of the fixed plate 111, and make the pressure roller 17 of the tensioner contact the belt 212;

[0054] S2. The motor 12 drives the middle coupling shaft 13 to rotate through the coupling 131. When the middle coupling shaft 13 rotates, the driving wheel 1111 engaged with the middle coupling shaft 13 rotates, and then the driving wheel 1111 drives the driven wheel 211 to rotate through the belt 212.

[0055] S3, the middle coupling shaft 13 drives the driven plate 21 to move along the screw shaft 133, changing the center distance between the driving wheel 1111 and the belt 212, thereby changing the tightness of the belt 212;

[0056] S4. Observe the distance between the reference line 2121 and the reference groove 2111. When the distance between the reference line 2121 and the reference groove 2111 is within the range of 0 to the circumference of the driven pulley 211, it indicates that the tensioning strength of the tensioner on the belt 212 is insufficient to keep the belt 212 taut.

[0057] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A tensioner strength testing system, characterized by: It comprises an active component (1) and a driven component (2) arranged on the active component (1); The active component (1) includes a test bench (11), a motor (12), a coupling structure, a tensioner, and a driving body arranged on the test bench (11), wherein the motor (12) is connected to the coupling structure in a transmission manner, and the coupling structure is used to drive the driving body to rotate; The driven assembly (2) includes a driven plate (21) slidably connected to the test bench (11) and a displacement control structure for controlling the movement of the driven plate (21); a driven wheel (211) is rotatably connected to the driven plate (21); a belt (212) is sleeved on the driven wheel (211); the other end of the belt (212) is connected to the driving body through a tensioning wheel; the displacement control structure is connected to one end of the coupling structure; one side of the coupling structure drives the driving body to rotate, and then drives the driving body to drive the driven wheel (211) to rotate through the belt (212); the other side of the coupling structure drives the driven plate (21) to move through the displacement control structure, thereby changing the distance between the driving body and the driven plate (21); A fixed plate (111) is provided on the test bench (11) near one end of the motor (12); a driving body includes a driving wheel (1111) rotatably connected to the fixed plate (111); a coupling structure includes a middle coupling shaft (13) rotatably connected to the top of the test bench (11); the middle coupling shaft (13) is meshed with the driving wheel (1111); a coupling (131) is provided at one end of the middle coupling shaft (13); the middle coupling shaft (13) is transmission-connected to the motor (12) through the provided coupling (131); a clamping shaft (132) is provided at the other end of the middle coupling shaft (13); the middle coupling shaft (13) is connected to the displacement shaft (12) through the provided clamping shaft (132). The control structure is connected, and the displacement control structure includes a control body (22) and a locking body (23) arranged on the driven plate (21); an opposing frame (213) is provided on the driven plate (21); a screw shaft (133) is provided at the bottom end of the clamping shaft (132) on the test bench (11); the control body (22) includes a first roller (221) and a second roller (222) rotatably connected to the opposing frame (213); the first roller (221) is meshed with the second roller (222); the clamping shaft (132) is engaged with the inner wall of the first roller (221); and the screw shaft (133) is threadedly connected to the inner wall of the second roller (222); The first roller (221) is a hollow cylinder as a whole, and a single tooth (223) is provided on the surface of the first roller (221). The second roller (222) is a hollow cylinder with a plurality of tooth-shaped grooves formed on the outer surface, and the single tooth (223) meshes with the tooth-shaped grooves. The locking body (23) includes an end sleeve (231) provided at one end of the driven plate (21) and a top sleeve shell (232) connected to the top of the end sleeve (231). A third roller (233) is provided in the top sleeve shell (232). The third roller (233) is a hollow cylinder with a recessed outer wall. One end of the clamping shaft (132) passes through the middle of the third roller (233) and is engaged with the third roller (233). An up-and-down sliding mechanism is provided in the end sleeve (231). A movable lifting plate (234) is provided with a return spring at the bottom of the top of the lifting plate (234). The lifting plate (234) is connected to the inner wall of the end sleeve plate (231) through the provided return spring. The top of the lifting plate (234) contacts the outer wall of the third roller (233). A latching tooth (235) is provided at the bottom of the lifting plate (234). A tooth groove (1121) is correspondingly provided in the displacement groove (112). The latching tooth (235) contacts the tooth groove (1121). The surface of the driven wheel (211) is provided with a reference groove (2111), and the surface of the belt (212) is correspondingly provided with a plurality of reference lines (2121).

2. The tensioner strength testing system according to claim 1, characterized in that: The other end of the belt (212) is sleeved on the driving wheel (1111), and a displacement groove (112) is provided on the upper surface of the test bench (11) at one end away from the motor (12). The driven plate (21) is located in the displacement groove (112) and is horizontally slidably connected to the displacement groove (112). The tensioner includes a fixed arm (14) fixed to the top of the fixed plate (111), a movable arm (15) is hinged at one end of the bottom of the fixed arm (14), an elastic body (16) is hinged at one end of the fixed arm (14) away from the driving wheel (1111), and the elastic body (16) is connected to the surface of one end of the movable arm (15). One end of the movable arm (15) is rotatably connected to a belt pressure wheel (17) for tightening the belt (212).

3. The tensioner strength testing system according to claim 2, characterized in that: Two pairs of limiting wheels are provided on the fixed plate (111) and the driven plate (21), and the belt (212) passes through the limiting wheels.

4. The tensioner strength testing system according to claim 2, characterized in that: The spacing value between adjacent reference lines (2121) on the surface of the belt (212) is the circumference value of the driven wheel (211), and one of the reference lines (2121) is aligned with the reference groove (2111).

5. A method for testing using the tensioner strength testing system according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. Install and fix the tensioner to be tested on the top of the fixed plate (111), and make the pressure roller (17) of the tensioner contact the belt (212); S2, the motor (12) drives the middle coupling shaft (13) to rotate through the coupling (131), and when the middle coupling shaft (13) rotates, the driving wheel (1111) meshed with the middle coupling shaft (13) rotates, and then drives the driving wheel (1111) to rotate through the belt (212); S3, the middle coupling shaft (13) drives the driven plate (21) to move along the screw shaft (133), changing the center distance between the driving wheel (1111) and the belt (212) to change the tightness of the belt (212); S4. Observe the distance between the reference line (2121) and the reference groove (2111). When the distance between the reference line (2121) and the reference groove (2111) is within the range of 0 to the circumference of the driven wheel (211), it indicates that the tensioning strength of the tensioning wheel on the belt (212) is insufficient to maintain the tautness of the belt (212).

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