Finished rubber testing device

Abstract

The present invention relates to the technical field of rubber performance testing, and specifically to a finished rubber testing device, comprising a base and a guide rail fixed on the base, and further comprising: a first clamping mechanism, wherein two groups of the first clamping mechanisms are symmetrically arranged on the base, and the two groups of the first clamping mechanisms are respectively used to clamp the ends of the rubber strip to be tested, and two supporting rollers are symmetrically and movably arranged on the base, and the supporting rollers are connected to a height control mechanism installed on the base, and the rubber strip passes over the two supporting rollers to form an inverted "U" shape; a threaded driving mechanism can adjust the spacing between the two groups of second clamping mechanisms before performing a pulling action, so as to achieve the effect that the length of the pulled part of the rubber strip decreases during the testing process, while the pulled length remains constant, that is, the tension on the rubber strip is increased by changing the length of the pulled part of the rubber strip and keeping the pulled length of the rubber strip constant.

Description

Technical Field

[0001] The invention relates to the technical field of rubber performance detection, in particular to a finished rubber detection device. Background Art

[0002] Rubber is a material with elasticity and ductility. However, in some usage scenarios, there are certain requirements for its elasticity and ductility. Therefore, it is necessary to test its mechanical properties in rubber production. The basic principle of rubber ductility testing is to measure the stress-strain characteristics of the rubber material during the stretching process by applying gradually increasing tensile force, thereby evaluating its strength, ductility and material properties.

[0003] There are usually two testing methods: unidirectional tension and bidirectional tension. The unidirectional tension test focuses on the performance of the material in a single stress direction, while the bidirectional tension test provides a more comprehensive evaluation method that can reveal the true mechanical behavior of the material under complex stress states.

[0004] When testing rubber, longer rubber strips may be more advantageous in ductility testing because they can withstand greater tensile forces without breaking, thus providing more accurate measurement results. Nowadays, the clamping points of the rubber are usually fixed. During the test, the elongation of the rubber gradually increases, which requires sufficient pulling stroke. Moreover, when the rubber elongation exceeds the limit and breaks, it will also cause greater destructive force, which may cause damage to the measuring instruments used in the test. Summary of the invention

[0005] The object of the present invention is to provide a finished rubber detection device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A finished rubber testing device comprises a base and a guide rail fixed on the base, and further comprises:

[0008] A first clamping mechanism, wherein two groups of the first clamping mechanisms are symmetrically arranged on the base, and the two groups of the first clamping mechanisms are respectively used to clamp the ends of the rubber strip to be tested, and two supporting rollers are symmetrically and movably arranged on the base, and the supporting rollers are connected to a height control mechanism installed on the base, and the rubber strip passes over the two supporting rollers to form an inverted "U" shape;

[0009] Two vertical arms are symmetrically arranged on the guide rail, the two vertical arms are connected to a threaded driving mechanism installed on the guide rail, one end of the vertical arm away from the guide rail is connected to a pulling driving mechanism, the pulling driving mechanism is connected to a second clamping mechanism, the second clamping mechanism is used to clamp the portion of the rubber strip between the two support rollers, the pulling driving mechanism drives the second clamping mechanism to perform a bidirectional pulling action on the rubber strip, and the height control mechanism drives the support roller to descend;

[0010] The threaded drive mechanism can drive the two vertical arms to move toward or away from each other along the length direction of the guide rail, so that during the detection process, the length of the pulled portion of the rubber strip changes, while the pulled length remains constant.

[0011] As a further solution of the present invention: the second clamping mechanism includes two relatively arranged assembly plates, two guide columns are fixed on the assembly plates, and two clamping plates are symmetrically slidably provided on the two guide columns. A double-headed hydraulic cylinder is also installed on the assembly plate, and the two ends of the double-headed hydraulic cylinder are respectively fixedly connected with connecting plates, and the two connecting plates are respectively fixed to the two clamping plates.

[0012] As a further solution of the present invention: the pulling drive mechanism includes a power assembly installed on the base and a fixed-length pulling structure connecting the power assembly and the vertical arm, and the fixed-length pulling structure is connected to the assembly plate.

[0013] As a further solution of the present invention: a cross arm is fixed to one end of the vertical arm away from the guide rail, the fixed-length pulling structure comprises a cross bar slidably fitted with the cross arm and two connecting arms fixed to the cross bar, and the connecting arms are fixed to the assembly plate;

[0014] A cam is rotatably mounted on the vertical arm, a follower rod is fixed at the end of the cross bar, a slide groove is provided on the follower rod, a convex column adapted to the slide groove is fixed on the cam, the convex column extends into the slide groove and is slidably connected to the follower rod.

[0015] As a further solution of the present invention: the power assembly includes a first drive motor mounted on the base, a horizontal shaft rotatably mounted on the base and connected to the output end of the first drive motor, and two sets slidably sleeved on the horizontal shaft;

[0016] Wherein, the horizontal axis is connected to the height control mechanism, the two kits are rotatably mounted on the two vertical arms respectively, and the rotating shaft of the cam is connected to the kit through a first bevel gear set, and a concave-convex transmission structure is provided between the kit and the horizontal axis.

[0017] As a further solution of the present invention: the concave-convex transmission structure includes two strip-shaped protrusions formed on the outer wall of the horizontal axis and two strip-shaped grooves arranged on the inner wall of the sleeve, the strip-shaped grooves are adapted to the strip-shaped protrusions, and both are parallel to the central axis of the horizontal axis and the sleeve.

[0018] As a further solution of the present invention: the thread drive mechanism includes a second drive motor mounted on the guide rail, a bidirectional screw rod rotatably mounted on the guide rail and connected to the output end of the second drive motor, and two sliders symmetrically slidably engaged on the guide rail;

[0019] The two vertical arms are respectively fixed on the two sliding blocks, the bidirectional screw rod passes through the two sliding blocks, and the two sliding blocks are threadedly connected to the bidirectional screw rod.

[0020] As a further solution of the present invention: the height control mechanism includes a follower structure connected to the horizontal axis and a yielding component connecting the follower structure and the support roller, the follower structure is triggered when the horizontal axis rotates, and can prompt the yielding component to drive the support roller to rise and fall.

[0021] As a further solution of the present invention: the yielding assembly includes a guide plate member fixedly mounted on the base and a lifting plate member slidably fitted with the guide plate member, the support roller is mounted on the lifting plate member, and a transmission arm is fixed to the side of the lifting plate member, and a sleeve connected to the follower structure is rotatably mounted on one end of the transmission arm away from the lifting plate member.

[0022] As a further solution of the present invention: the follower structure includes a vertical shaft rotatably mounted on the side of the guide plate and slidably engaged with the sleeve, the vertical shaft is connected to the transverse shaft through a transmission member, and a limit plate is also fixed on the side of the guide plate, and a through hole for the vertical shaft to pass through is provided at the center of the limit plate;

[0023] Among them, a transverse piece is also provided on the vertical shaft, and the transverse piece can slide along the radial direction of the vertical shaft. One end of the transverse piece is connected to the sleeve through a connecting rod, and the two ends of the connecting rod are respectively hinged to the transverse piece and the sleeve. A column is fixed to the other end of the transverse piece, and an eccentric groove adapted to the column is provided on the limit plate. The column extends into the eccentric groove and is slidably connected to the limit plate.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The two sets of first clamping mechanisms and two support rollers can keep the rubber strip to be tested in an inverted "U" shape, and the second clamping mechanism clamps the straight portion of the rubber strip between the two support rollers;

[0026] The pulling action of the two sets of second clamping mechanisms establishes a mechanical interlock. During the test, the two sets are driven by the horizontal axis to rotate synchronously, so that the two sets of second clamping mechanisms move synchronously, and the two-way pulling of the rubber strip is realized. It can simulate a more complex stress state of the rubber strip, making the deformation of the central area of ​​the rubber strip more uniform, so as to better reveal the more comprehensive mechanical behavior of the material under large deformation conditions, which is helpful to more accurately describe the actual application performance of the material;

[0027] Secondly, the threaded drive mechanism can adjust the spacing between the two groups of second clamping mechanisms before performing the pulling action, so as to achieve the effect that the length of the pulled part of the rubber strip decreases during the detection process, while the pulled length remains constant, that is, the tension on the rubber strip is increased by changing the length of the pulled part of the rubber strip and maintaining the pulled length of the rubber strip constant. Compared with the method of fixing the clamping point during the pulling test, the pulling stroke can be effectively reduced, avoiding the problem of excessive elongation of the rubber strip and excessive rupture causing greater damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The figure is a schematic structural diagram of an embodiment of a finished rubber testing device.

[0029] Figure 2 This is a schematic structural diagram of another angle of an embodiment of a finished rubber detection device.

[0030] Figure 3 This is a structural schematic diagram of another angle of an embodiment of a finished rubber detection device.

[0031] Figure 4 for Figure 1 A magnified view of the structure at center.

[0032] Figure 5 for Figure 2 A magnified view of the structure at point B.

[0033] Figure 6 This is a schematic diagram of the structure of a base in one embodiment of a finished rubber testing device.

[0034] Figure 7 This is a schematic structural diagram of a second clamping mechanism in an embodiment of a finished rubber testing device.

[0035] Figure 8 This is a structural explosion diagram of the pulling drive mechanism in one embodiment of the finished rubber testing device.

[0036] Fig. 9 for Figure 8 Schematic diagram of the structure from another angle.

[0037] Fig.10This is a structural explosion diagram of the height control mechanism in one embodiment of the finished rubber testing device.

[0038] In the figure: 1, base; 2, guide rail; 3, vertical arm; 4, cross arm; 401, first through slot; 402, second through slot; 5, cross bar; 6, connecting arm; 601, connecting piece; 7, assembly plate; 701, guide column; 8, clamping plate; 801, serrated surface; 9, double-head hydraulic cylinder; 10, connecting plate; 11, first drive motor; 12, second drive motor; 13, bidirectional screw rod; 14, slider; 15, driven rod; 1501, slider Groove; 16, horizontal axis; 17, kit; 18, cam; 1801, boss; 19, first bevel gear set; 20, second bevel gear set; 21, transmission shaft; 22, transmission belt; 23, vertical shaft; 24, guide plate; 2401, strip groove; 25, lifting plate; 26, support roller; 27, sleeve; 28, connecting rod; 29, transmission arm; 30, horizontal piece; 31, column; 32, limit plate; 3201, eccentric groove. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0040] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0041] See also Figure 1-Figure 10 In an embodiment of the present invention, a finished rubber detection device includes a base 1 and a guide rail 2 fixed on the base 1, and further includes:

[0042] A first clamping mechanism, wherein two groups of the first clamping mechanisms are symmetrically arranged on the base 1, and the two groups of the first clamping mechanisms are respectively used to clamp the ends of the rubber strip to be tested, and two supporting rollers 26 are symmetrically and movably arranged on the base 1, and the supporting rollers 26 are connected to a height control mechanism installed on the base 1, and the rubber strip passes over the two supporting rollers 26 to form an inverted "U" shape;

[0043] Two vertical arms 3 are symmetrically arranged on the guide rail 2, the two vertical arms 3 are connected to a threaded driving mechanism installed on the guide rail 2, one end of the vertical arm 3 away from the guide rail 2 is connected to a pulling driving mechanism, the pulling driving mechanism is connected to a second clamping mechanism, the second clamping mechanism is used to clamp the portion of the rubber strip between the two support rollers 26, the pulling driving mechanism drives the second clamping mechanism to perform a bidirectional pulling action on the rubber strip, and the height control mechanism drives the support roller 26 to descend;

[0044] The threaded drive mechanism can drive the two vertical arms 3 to move toward or away from each other along the length direction of the guide rail 2, so that during the detection process, the length of the pulled portion of the rubber strip changes, while the pulled length remains constant.

[0045] Before the actual test, the corresponding preparation work should be completed. Specifically, the rubber product to be tested should be cut according to the specifications of the first clamping mechanism or the second clamping mechanism. For this application, the rubber product to be tested can be cut into strips of specific length and width.

[0046] Secondly, the first clamping mechanism and the second clamping mechanism have the same structure, except that the first clamping mechanism is always on the base 1, and during the detection process, the first clamping mechanism always keeps the end of the rubber strip in a clamped state, while the second clamping mechanism is driven to move by the threaded driving mechanism through the vertical arm 3 during the detection process;

[0047] Furthermore, during the entire detection process, the distance between the two groups of the second clamping mechanisms gradually shortens, so the distance between the two clamping points on the rubber strip gradually shortens, that is, during the detection process, the length of the pulled portion of the rubber strip gradually shortens, while the movement stroke of the pulling drive mechanism each time remains unchanged;

[0048] In summary, on the one hand, the effect of changing the length of the pulled part of the rubber strip during the test while keeping the pulled length constant is achieved, that is, the pulling force on the rubber strip gradually increases. Compared with the conventional unidirectional pulling, in the present application, the rubber strip is pulled in both directions synchronously, which can simulate a more complex stress state of the rubber strip, so that the deformation of the central area of ​​the rubber strip is more uniform, so as to better reveal the more comprehensive mechanical behavior of the material under large deformation conditions, which is helpful to more accurately describe the actual application performance of the material;

[0049] On the other hand, in the specific implementation of the present application, the tension on the rubber strip is increased by changing the length of the pulled portion of the rubber strip and keeping the pulled length of the rubber strip constant. Compared with the method of fixing the clamping point during pulling detection, the pulling stroke can be effectively reduced.

[0050] It should also be noted that during the detection process, the recording of relevant data is essential. In this regard, this application does not make any specific restrictions on the means of recording data, and appropriate existing means can be selected according to actual needs.

[0051] The specific detection process is as follows:

[0052] Initially, two sets of the first clamping mechanisms are used to clamp the two ends of the rubber strip respectively, and ensure that the rubber strip passes over the top of the two support rollers 26. The two support rollers 26 support the rubber strip, so that the rubber strip forms an inverted "U" shape. Therefore, the part of the rubber strip between the two support rollers 26 remains horizontal, so that the second clamping mechanism can smoothly clamp the rubber strip.

[0053] Subsequently, the two sets of the second clamping mechanisms respectively clamp the two symmetrical points of the rubber strip between the two supporting rollers 26, and the pulling drive mechanism drives the two sets of the second clamping mechanisms to move synchronously and in different directions, so that the rubber strip is pulled in both directions;

[0054] After the first pulling is completed, the second clamping mechanism releases the rubber strip, and the threaded driving mechanism drives the two sets of second clamping mechanisms to move closer to each other by one end, and then a second pulling is performed. During the second pulling, the length of the pulled part of the rubber strip is shortened, while the pulled length remains constant, that is, the tension on the rubber strip increases;

[0055] By analogy, the distance between the two sets of second clamping mechanisms is gradually reduced, and multiple pulling tests are performed;

[0056] Finally, the deformation capacity and crack resistance of the rubber strip are evaluated based on the data measured in each round of testing.

[0057] Since the first clamping mechanism and the second clamping mechanism have the same structure, the second clamping mechanism will be described below:

[0058] Please refer again Figure 7 The second clamping mechanism includes two relatively arranged assembly plates 7, two guide columns 701 are fixed on the assembly plates 7, and two clamping plates 8 are symmetrically slidably provided on the two guide columns 701. A double-headed hydraulic cylinder 9 is also installed on the assembly plate 7, and the two ends of the double-headed hydraulic cylinder 9 are respectively fixedly connected with connecting plates 10, and the two connecting plates 10 are respectively fixed to the two clamping plates 8.

[0059] Furthermore, a serrated surface 801 is formed on the clamping plate 8. The serrated surface 801 can effectively improve the stability of the rubber strip clamping and reduce the risk of damage to the instrument due to the rubber strip slipping and falling off during the detection process.

[0060] It should be emphasized that, with respect to the first clamping mechanism, the two assembly plates 7 are fixedly mounted on the base 1 , and with respect to the second clamping mechanism, the two assembly plates 7 are connected to the pulling drive mechanism.

[0061] Please refer again Figure 5 , Figure 8 as well as Fig. 9 The pulling drive mechanism includes a power assembly installed on the base 1 and a fixed-length pulling structure connecting the power assembly and the vertical arm 3, and the fixed-length pulling structure is connected to the assembly plate 7. A cross arm 4 is fixed to the end of the vertical arm 3 away from the guide rail 2, and the fixed-length pulling structure includes a cross bar 5 slidably fitted with the cross arm 4 and two connecting arms 6 fixed to the cross bar 5, and the connecting arms 6 are fixed to the assembly plate 7. A cam 18 is also rotatably mounted on the vertical arm 3, and a driven rod 15 is fixed at the end of the cross bar 5, and a sliding groove 1501 is provided on the driven rod 15, and a convex column 1801 adapted to the sliding groove 1501 is fixed on the cam 18, and the convex column 1801 extends into the sliding groove 1501 and is slidably connected to the driven rod 15.

[0062] It should be supplemented that the connecting arm 6 is fixed to the cross bar 5 through multiple connecting members 601, and the driven rod 15 is fixed to the cross bar 5 through a connecting column (not shown in the figure). Accordingly, the cross arm 4 is provided with a first through groove 401 and a second through groove 402 for the movement of the connecting member 601 and the connecting column respectively.

[0063] During each round of detection, the power assembly can drive the cam 18 to complete one circle of rotation. During the first half of the rotation of the cam 18, the boss 1801 will slide with the driven rod 15 through the slide groove 1501, so that the driven rod 15 drives the cross bar 5 to slide toward one side on the cross arm 4. Correspondingly, the connecting arm 6 moves with the cross bar 5, and the second clamping mechanism performs a pulling action on the rubber strip. During the second half of the rotation of the cam 18, each component is reset and the rubber strip returns to its original length.

[0064] The power assembly includes a first drive motor 11 mounted on the base 1, a transverse shaft 16 rotatably mounted on the base 1 and connected to the output end of the first drive motor 11, and two sets 17 slidably sleeved on the transverse shaft 16. The transverse shaft 16 is connected to the height control mechanism, the two sets 17 are rotatably mounted on the two vertical arms 3, and the rotating shaft of the cam 18 is connected to the sets 17 through a first bevel gear set 19, and a concave-convex transmission structure is provided between the sets 17 and the transverse shaft 16.

[0065] Specifically, the first bevel gear set 19 includes a first bevel gear fixedly mounted on the kit 17 and a second bevel gear fixedly mounted coaxially with the cam 18 , and the second bevel gear meshes with the first bevel gear.

[0066] The concave-convex transmission structure includes two strip-shaped protrusions formed on the outer wall of the transverse axis 16 and two strip-shaped grooves arranged on the inner wall of the sleeve 17. The strip-shaped grooves are adapted to the strip-shaped protrusions, and both are parallel to the central axes of the transverse axis 16 and the sleeve 17.

[0067] Each time pulling is performed, the first driving motor 11 drives the horizontal shaft 16 to rotate, and accordingly, the horizontal shaft 16 can drive the kit 17 to rotate through the adaptation relationship between the strip-shaped protrusion and the strip-shaped groove, and then, the kit 17 drives the cam 18 to rotate one circle through the first bevel gear set 19, and the boss 1801 completes a circular motion, so that the cross bar 5 slides back and forth once on the cross arm 4.

[0068] Please refer again Figure 6 and Fig. 9 The thread drive mechanism includes a second drive motor 12 mounted on the guide rail 2, a bidirectional screw rod 13 rotatably mounted on the guide rail 2 and connected to the output end of the second drive motor 12, and two sliders 14 symmetrically slidably engaged on the guide rail 2. The two vertical arms 3 are respectively fixed on the two sliders 14, the bidirectional screw rod 13 passes through the two sliders 14, and the two sliders 14 are threadedly connected to the bidirectional screw rod 13.

[0069] After each round of pulling test, the second driving motor 12 is started to drive the bidirectional screw 13 to rotate, so that under the guidance of the guide rail 2, the two sliders 14 are threadedly matched with the bidirectional screw 13 at the same time. Specifically, the two sliders 14 slide close to each other for a distance. During the whole testing process, the distance between the two sliders 14 is intermittently shortened, so as to achieve the effect that the length of the pulled part of the rubber strip decreases during the testing process, while the pulled length remains constant.

[0070] Secondly, the distance between the two sliders 14 is adjusted by the bidirectional screw 13 , because the threaded fit between the bidirectional screw 13 and the slider 14 is of high precision, thus effectively ensuring the accuracy of variable control during detection.

[0071] Please refer again Figure 4 and Fig.10The height control mechanism includes a follower structure connected to the horizontal shaft 16 and a yielding assembly connecting the follower structure and the support roller 26. The follower structure is triggered when the horizontal shaft 16 rotates, and can prompt the yielding assembly to drive the support roller 26 to rise and fall. The yielding assembly includes a guide plate 24 fixedly mounted on the base 1 and a lifting plate 25 slidably fitted with the guide plate 24. The support roller 26 is mounted on the lifting plate 25, and a transmission arm 29 is fixed to the side of the lifting plate 25. A sleeve 27 connected to the follower structure is rotatably mounted on the end of the transmission arm 29 away from the lifting plate 25.

[0072] Furthermore, a strip groove 2401 is provided on one side of the guide plate 24 facing the transmission arm 29, and the strip groove 2401 is provided for the movement of the transmission arm 29. The follower structure includes a vertical shaft 23 rotatably mounted on the side of the guide plate 24 and slidably fitted with the sleeve 27, the vertical shaft 23 is connected to the horizontal shaft 16 through a transmission member, and a limit plate 32 is fixed on the side of the guide plate 24, and a through hole for the vertical shaft 23 to pass through is provided at the center of the limit plate 32;

[0073] In detail, the transmission member includes a transmission shaft 21 rotatably mounted on the base 1 and a transmission belt 22 connecting the transmission shaft 21 and the vertical shaft 23, and the transmission shaft 21 is connected to the horizontal shaft 16 through a second bevel gear set 20;

[0074] The second bevel gear set 20 includes a number 3 bevel gear fixedly mounted on the transverse shaft 16 and a number 4 bevel gear fixedly mounted on the transmission shaft 21 , and the number 4 bevel gear is meshed with the number 3 bevel gear.

[0075] A transverse piece 30 is also provided on the vertical shaft 23. The transverse piece 30 can slide radially along the vertical shaft 23. One end of the transverse piece 30 is connected to the sleeve 27 through a connecting rod 28. Both ends of the connecting rod 28 are hinged to the transverse piece 30 and the sleeve 27 respectively. A column 31 is fixed to the other end of the transverse piece 30. An eccentric groove 3201 adapted to the column 31 is provided on the limiting plate 32. The column 31 extends into the eccentric groove 3201 and is slidably connected to the limiting plate 32.

[0076] During the process of the cam 18 rotating one circle, similarly, the horizontal shaft 16 drives the transmission shaft 21 to rotate one circle through the second bevel gear set 20, and the transmission shaft 21 drives the vertical shaft 23 to rotate one circle through the transmission belt 22, and the vertical shaft 23 drives the column 31 to rotate in a circle through the cross member 30. Under the limiting action of the eccentric groove 3201, the movement trajectory of the column 31 is consistent with the shape of the eccentric groove 3201. Specifically, the cross member 30 will slide on the vertical shaft 23 along the radial direction of the vertical shaft 23. In the first stage of the pulling process, the sliding of the cross member 30 will drive the sleeve 27 to slide downward on the vertical shaft 23 through the connecting rod 28. Then, the sleeve 27 drives the lifting plate 25 to slide downward on the guide plate 24 through the transmission arm 29, so that the height of the support roller 26 is reduced to avoid blocking the pulling path.

[0077] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0078] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A finished rubber testing device, comprising a base (1) and a guide rail (2) fixedly mounted on the base (1); characterized in that: Also includes: A first clamping mechanism, wherein two groups of the first clamping mechanisms are symmetrically arranged on the base (1), and the two groups of the first clamping mechanisms are respectively used to clamp the ends of the rubber strip to be tested, and the base (1) is also symmetrically and movably provided with two support rollers (26), the support rollers (26) being connected to a height control mechanism installed on the base (1), and the rubber strip passes over the two support rollers (26) to form an inverted "U" shape; two vertical arms (3) are symmetrically and movably arranged on the guide rail (2), the two vertical arms (3) are connected to a threaded drive mechanism installed on the guide rail (2), and one end of the vertical arm (3) away from the guide rail (2) is connected to a pulling drive mechanism, and the pulling drive mechanism is connected to a first The second clamping mechanism is used to clamp the portion of the rubber strip between the two support rollers (26), the second clamping mechanism is driven by the pulling drive mechanism to perform a bidirectional pulling action on the rubber strip, and the height control mechanism drives the support roller (26) to descend; wherein the threaded drive mechanism can drive the two vertical arms (3) to move toward or away from each other along the length direction of the guide rail (2), so that during the detection process, the length of the pulled portion of the rubber strip changes, while the pulled length remains constant; the second clamping mechanism comprises two relatively arranged assembly plates (7), two guide posts (701) are fixed on the assembly plates (7), and the two guide posts (701) are symmetrically slidably provided with Two clamping plates (8), a double-headed hydraulic cylinder (9) is also installed on the assembly plate (7), and the two ends of the double-headed hydraulic cylinder (9) are respectively fixedly connected to the connecting plates (10), and the two connecting plates (10) are respectively fixed to the two clamping plates (8); the pulling drive mechanism comprises a power component installed on the base (1) and a fixed-length pulling structure connecting the power component and the vertical arm (3), and the fixed-length pulling structure is connected to the assembly plate (7); a cross arm (4) is fixed at one end of the vertical arm (3) away from the guide rail (2), and the fixed-length pulling structure comprises a cross bar (5) slidably fitted with the cross bar (4) and two connecting arms (6) fixed to the cross bar (5), and the connecting arm (6) is connected to the assembly plate (7). The supporting plate (7) is fixed; wherein a cam (18) is also rotatably mounted on the vertical arm (3); a driven rod (15) is fixed at the end of the cross bar (5); a slide groove (1501) is provided on the driven rod (15); a convex column (1801) adapted to the slide groove (1501) is fixed on the cam (18); the convex column (1801) extends into the slide groove (1501) and is slidably connected to the driven rod (15); the power assembly comprises a first drive motor (11) mounted on the base (1), a transverse shaft (16) rotatably mounted on the base (1) and connected to the output end of the first drive motor (11); and two sets (17) slidably sleeved on the transverse shaft (16);The horizontal axis (16) is connected to the height control mechanism, the two sets (17) are rotatably mounted on the two vertical arms (3), and the rotating shaft of the cam (18) is connected to the set (17) through a first bevel gear set (19), and a concave-convex transmission structure is provided between the set (17) and the horizontal axis (16); the concave-convex transmission structure comprises two strip-shaped protrusions formed on the outer wall of the horizontal axis (16) and two strip-shaped grooves provided on the inner wall of the set (17), the strip-shaped grooves are adapted to the strip-shaped protrusions, and the two are parallel to the central axis of the horizontal axis (16) and the set (17).

2. A finished rubber testing device according to claim 1, characterized in that: The threaded drive mechanism comprises a second drive motor (12) mounted on the guide rail (2), a bidirectional lead screw (13) rotatably mounted on the guide rail (2) and connected to the output end of the second drive motor (12), and two sliders (14) symmetrically slidably engaged on the guide rail (2); wherein the two vertical arms (3) are respectively fixed on the two sliders (14), the bidirectional lead screw (13) passes through the two sliders (14), and the two sliders (14) are threadedly connected to the bidirectional lead screw (13).

3. A finished rubber testing device according to claim 1, characterized in that: The height control mechanism comprises a follower structure connected to the transverse shaft (16) and a clearance component connecting the follower structure and the support roller (26); the follower structure is triggered when the transverse shaft (16) rotates, and can prompt the clearance component to drive the support roller (26) to rise and fall.

4. A finished rubber testing device according to claim 3, characterized in that: The yielding assembly comprises a guide plate (24) fixedly mounted on the base (1) and a lifting plate (25) slidably fitted with the guide plate (24), the support roller (26) being mounted on the lifting plate (25), and a transmission arm (29) being fixed on the side of the lifting plate (25), and a sleeve (27) connected to the follower structure being rotatably mounted on one end of the transmission arm (29) away from the lifting plate (25).

5. A finished rubber testing device according to claim 4, characterized in that: The follower structure comprises a vertical shaft (23) rotatably mounted on the side of the guide plate (24) and slidably fitted with the sleeve (27); the vertical shaft (23) is connected to the transverse shaft (16) via a transmission member; a limit plate (32) is also fixed to the side of the guide plate (24); a through hole for the vertical shaft (23) to pass through is provided at the center of the limit plate (32); wherein the vertical shaft (23) is also provided with a transverse member (30) capable of being moved along the vertical shaft (23) is radially slidable, one end of the cross-piece (30) is connected to the sleeve (27) through a connecting rod (28), two ends of the connecting rod (28) are hinged to the cross-piece (30) and the sleeve (27) respectively, the other end of the cross-piece (30) is fixed with a column (31), the limiting plate (32) is provided with an eccentric groove (3201) adapted to the column (31), the column (31) extends into the eccentric groove (3201) and is slidably connected to the limiting plate (32).

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