Resiliometer for detecting elasticity of rubber

Abstract

The utility model relates to a rubber elasticity detection resiliometer which comprises a support and a swing rod, a sample holder is arranged on the support, a first shaft body is arranged between one end of the swing rod and the support, a pendulum bob capable of impacting the sample holder is arranged at the other end of the swing rod, a transverse scale is arranged on the support, a pointer capable of sliding horizontally is arranged on the transverse scale, and the pointer is hinged to a connecting rod. The connecting rod is hinged to a driving arm, a second shaft body is arranged between one end of the driving arm and the support, the other end of the driving arm is provided with a clamping opening with an opening towards one side of the connecting rod, and the swing rod is provided with a first elastic clamping pin capable of being matched with the clamping opening. In the back-swinging process, the first elastic clamping pin drives the driving arm to axially deflect around the second shaft body, the connecting rod is driven to drive the pointer to slide on the transverse ruler, the corresponding reading when the pendulum bob swings at the maximum amplitude can be read, and compared with an arc-shaped ruler, reading of the reading, zeroing operation and test sample taking and placing operation are facilitated.

Description

Technical Field

[0001] The utility model belongs to the field of rebound testing, and in particular relates to a rubber elasticity detection rebound instrument. Background Art

[0002] The foam rubber end cap is a product formed by foam injection molding. It is lightweight, material-saving, can absorb impact loads, is heat-insulating, sound-insulating, and has high specific strength. It can be used as a sealing end cap and is widely used in various fields. The foam rubber end cap needs to be tested for resilience before storage to verify its surface strength. Compared with the method of using a small ball to hit the surface of the foam rubber end cap with a certain impact kinetic energy to obtain the rebound kinetic energy and read the maximum rebound height of the small ball, the pendulum-type rubber elasticity test rebound instrument uses a pendulum to control the pendulum to swing around one end of the axis to hit the surface of the foam rubber end cap, so that the rebound direction of the pendulum is still around the axis, which can avoid the error problem caused by the uncontrollable rebound direction of the small ball. However, the pendulum-type rubber elasticity testing rebound instrument in the prior art uses the structure of driving the pointer to swing during the rebound and swing of the pendulum to point to the corresponding indication on the arc scale. The main defects are: after the pendulum swings back to the maximum amplitude at high speed, it will swing again to the foam rubber end cap to make multiple impacts with gradually decreasing amplitude. During the impact process, the pointer is easily offset due to the interaction with the pointer, thereby affecting the accuracy of the indication; secondly, it is inconvenient to observe the indication on the arc scale and it is easy to read it wrongly; in addition, it is inconvenient to adjust the pointer to zero, and it is inconvenient to clamp the foam rubber end cap with an additional clamp, which affects the detection efficiency. Utility Model Content

[0003] The utility model aims to solve at least one of the above technical problems to a certain extent. The utility model provides a rubber elasticity detection rebound tester, which can avoid pointer deviation caused by multiple impacts of the pendulum, and is convenient for observing and reading the indication, zeroing operation and taking and placing of test samples.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A rubber elasticity testing rebound instrument comprises a bracket and a pendulum, wherein the bracket is provided with a sample rack, a first shaft is provided between one end of the pendulum and the bracket, a pendulum capable of striking the sample rack is provided at the other end of the pendulum, a transverse scale is provided on the bracket, a pointer capable of horizontal sliding is provided on the transverse scale, the pointer is hinged with a connecting rod, the connecting rod is hinged with a driving arm, a second shaft is provided between one end of the driving arm and the bracket, a bayonet opening toward one side of the connecting rod is provided at the other end of the driving arm, and a first elastic bayonet pin capable of cooperating with the bayonet is provided on the pendulum.

[0006] Furthermore, a limiting member is provided on the bracket, and a zero position is provided on the transverse scale. The limiting member can cooperate with the pointer or the driving arm to limit the pointer from sliding out of the zero position.

[0007] Furthermore, the second shaft is located above the first shaft, and one end of the driving arm close to the bayonet is arc-shaped.

[0008] Furthermore, the first elastic bayonet includes a first pin rod and a first spring, the first pin rod is provided with a first limiting boss, one end of the first pin rod can extend into the bayonet, the other end of the first pin rod passes through the first spring and the rocker arm and is connected to a nut, and the two ends of the first spring are respectively abutted against the first limiting boss and the rocker arm.

[0009] Furthermore, the bracket is provided with a second elastic latch, and the second elastic latch is used to cooperate with the bottom of the swing rod to limit the swing rod from swinging downward.

[0010] Furthermore, the second elastic latch includes a second pin rod and a second spring, the second pin rod is provided with a second limiting boss, one end of the second pin rod can extend below the rocker arm, the other end of the second pin rod passes through the second spring and the bracket and is connected to an operating head, the two ends of the second spring are respectively abutted against the second limiting boss and the bracket, and the operating head can cooperate with the bracket to limit the position.

[0011] Furthermore, the sample rack includes a base, a clamping ring and a third spring. The base is provided with a sample column, the clamping ring corresponds to the end of the sample column, there are at least two third springs and they are respectively located on both sides of the clamping ring, one end of the third spring is connected to the base, and the other end of the third spring is connected to the clamping ring.

[0012] Furthermore, the sample column is a screw rod that cooperates with the base thread.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] (1) The utility model utilizes that when the pendulum swings downward along with the pendulum around the axial direction of the first axis to hit the sample, the first elastic latch is locked into the latch. During the swing back of the pendulum, the first elastic latch drives the driving arm to deflect axially around the second axis, thereby driving the connecting rod to drive the pointer to slide on the horizontal scale. When the pendulum hits again, the first elastic latch is separated from the driving arm from the opening of the latch, thereby solving the problem of pointer deviation caused by multiple impacts, and the corresponding indication when the pendulum swings to the maximum amplitude can be read.

[0015] (2) The utility model adopts a horizontal scale to replace the arc scale, which is convenient for observing and reading the indication.

[0016] (3) The utility model adopts a limiter to cooperate with the pointer or the driving arm to limit the pointer from sliding out of the zero position. It is sufficient to only put the driving arm in place. There is no need to align the pointer to the zero position for zeroing, which facilitates quick zeroing operation.

[0017] (4) The utility model uses a clamping ring connected by a third spring to clamp the sample on the sample column, which is convenient for taking and placing the test sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is a front structural diagram of an embodiment of the utility model;

[0020] Figure 2 It is a rear view structural diagram of an embodiment of the utility model;

[0021] Figure 3 It is a top view application diagram of one embodiment of the utility model;

[0022] Figure 4 This is an application diagram of an embodiment of the utility model. Figure 1 ;

[0023] Figure 5 This is an application diagram of an embodiment of the utility model. Figure 2 .

[0024] Markings in the figure: bracket 1, swing rod 2, sample rack 3, base 301, clamp ring 302, third spring 303, sample column 304, hand wheel 305;

[0025] First shaft 4, pendulum 5, horizontal scale 6, zero position 601, pointer 7, connecting rod 8, driving arm 9, bayonet 901, second shaft 10;

[0026] The first elastic bayonet 11 , the first pin rod 111 , the first spring 112 , the first limiting boss 113 , the nut 114 , the limiting member 12 , the second elastic bayonet 13 , the second pin rod 131 , the second spring 132 , the second limiting boss 133 , the operating head 134 , and the foam rubber end cap 14 . DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the present utility model, it should be understood that the terms "left", "right", "up", "down", "axial", "vertical", "horizontal", "inside", "outside" and the like 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 utility model 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 cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Aiming at the problem that the pendulum-type rubber elasticity testing rebound tester in the prior art has a pointer deviation due to multiple impacts, and the arc-shaped scale is inconvenient to observe the indication, resulting in errors, it is considered to use a horizontal scale and a corresponding pointer structure, such as Figure 1-2As shown, a preferred embodiment of the rubber elasticity testing and rebounding instrument of the utility model is shown, and the rubber elasticity testing and rebounding instrument comprises a bracket 1 and a swing rod 2, wherein the bracket 1 is provided with a sample rack 3, a first shaft body 4 is provided between one end of the swing rod 2 and the bracket 1, and a pendulum 5 which can hit the sample rack 3 is provided at the other end of the swing rod 2, a transverse scale 6 is provided on the bracket 1, and a pointer 7 which can slide horizontally is provided on the transverse scale 6, and the pointer 7 is hinged with a connecting rod 8, and the connecting rod 8 is hinged with a driving arm 9, a second shaft body 10 is provided between one end of the driving arm 9 and the bracket 1, and a bayonet 901 which opens to one side of the connecting rod 8 is provided at the other end of the driving arm 9. The pendulum 2 is provided with a first elastic bayonet 11 that can cooperate with the bayonet 901. When the pendulum 2 swings downward along with the pendulum 5 around the axial direction of the first shaft 4 to hit the sample, the first elastic bayonet 11 is snapped into the bayonet 901. During the swing back of the pendulum 5, the first elastic bayonet 11 drives the driving arm 9 to deflect axially around the second shaft 10, thereby driving the connecting rod 8 and driving the pointer 7 to slide on the transverse scale 6. When the pendulum 5 hits again, the first elastic bayonet 11 is separated from the driving arm 9 from the opening of the bayonet 901, thereby solving the problem of the pointer 7 being offset due to multiple impacts, and the indication on the transverse scale 6 can be quickly read from the pointer 7.

[0031] Furthermore, the bracket 1 is provided with a limiter 12, and the transverse scale 6 is provided with a zero position 601. The limiter 12 can cooperate with the pointer 7 or the driving arm 9 to limit the pointer 7 from sliding out of the zero position 601. Figure 1 As shown, taking the example that the limit member 12 and the first shaft body 4 are respectively located on both sides of the driving arm 9, the limit member 12 can be used to cooperate with the left side of the driving arm 9 to limit the driving arm 9 from continuing to deflect to the left. At this time, the pointer 7 corresponds to the zero position 601 and will not continue to slide to the left side of the horizontal scale 6. It is only necessary to put the driving arm 9 in place, and there is no need to align the pointer 7 with the zero position 601 for zeroing, so it is convenient to quickly return to zero. Similarly, the limit member 12 can also be set on the left side of the pointer 7 for limiting, and the effect is the same. In addition, by limiting the driving arm 9 from continuing to deflect to the left, it can also be prevented that the pendulum 2 pushes the pointer 7 to deflect to the left when the deflection decreases, and the pointer 7 slides out of the zero position 601.

[0032] Furthermore, the second shaft 10 is located above the first shaft 4, and the end of the driving arm 9 close to the bayonet 901 is arc-shaped. Figure 4 As shown, the first elastic latch 11 can slide along the arc-shaped end of the driving arm 9 to further reduce the influence of resistance.

[0033] like Figure 3As shown, further, the first elastic bayonet 11 includes a first pin rod 111 and a first spring 112, the first pin rod 111 is provided with a first limiting boss 113, one end of the first pin rod 111 can be extended into the bayonet 901, the other end of the first pin rod 111 passes through the first spring 112 and the rocker rod 2 and is connected to the nut 114, the two ends of the first spring 112 are respectively abutted against the first limiting boss 113 and the rocker rod 2, then the extension length of the first pin rod 111 can be adjusted by adjusting the position of the nut 114 on the first pin rod 111, the first spring 112 is pre-stressed, and the first pin rod 111 is elastically supported on the rocker rod 2 under the elastic force of the first spring 112, the first pin rod 111 can be compressed along its axial direction to achieve automatic extension and retraction, the structure is simple, and the installation and debugging are convenient.

[0034] Furthermore, the bracket 1 is provided with a second elastic pin 13, which is used to cooperate with the bottom of the pendulum 2 to limit the pendulum 2 from swinging downward. The pendulum 5 can be lowered by controlling the cooperation between the second elastic pin 13 and the pendulum 2, which is easy to operate.

[0035] Further, the second elastic latch 13 includes a second pin rod 131 and a second spring 132, the second pin rod 131 is provided with a second limiting boss 133, one end of the second pin rod 131 can extend below the swing rod 2, the other end of the second pin rod 131 passes through the second spring 132 and the bracket 1 and is connected to a manipulation head 134, the two ends of the second spring 132 are respectively abutted against the second limiting boss 133 and the bracket 1, the manipulation head 134 can be limitedly matched with the bracket 1, and the second spring 132 can be pre-pressed to elastically support the second pin rod 131 on the bracket 1 under the elastic force of the second spring 132, such as Figure 3 As shown in (a), in the natural state, the second pin 131 is supported by the second spring 132 and extends into the lowering of the swing rod 2, which can limit the swing rod 2 from swinging downward, as shown in FIG. Figure 3 As shown in (b), by manually pulling the operating head 134, the second limiting boss 133 is driven to compress the second spring 132, so that the second pin 131 shrinks toward the bracket 1 and makes way with the pendulum 2. Then, the pendulum 2 can swing under the gravity of the pendulum 5, thereby realizing the lowering of the pendulum 5. The structure is simple and the operation is convenient.

[0036] Furthermore, the sample rack 3 includes a base 301, a snap ring 302 and a third spring 303. The base 301 is provided with a sample column 304. The snap ring 302 corresponds to the end of the sample column 304. There are at least two third springs 303, which are respectively located on both sides of the snap ring 302. One end of the third spring 303 is connected to the base 301, and the other end of the third spring 303 is connected to the snap ring 302. The snap ring 302 can be used to move the sample column 304 outward. After the sample is placed on the sample column 304, the snap ring 302 is aligned with the sample. The tension of the third spring 303 is used to make the snap ring 302 clamp the sample on the sample column 304. Compared with an additional clamp structure, it is simpler and easier to operate.

[0037] Furthermore, the sample column 304 is a screw rod that is threadedly matched with the base 301 , and the screw rod can be rotated by the hand wheel 305 to adjust the length of the screw rod extending out of the base 301 , thereby adjusting the impact position according to different samples.

[0038] The working principle of the above-mentioned rubber elasticity testing hammer includes:

[0039] like Figure 1 As shown, taking the foam rubber end cap 14 as an example, initially, the foam rubber end cap 14 is clamped between the clamp ring 302 and the sample column 304, and the position of the sample column 304 is adjusted so that the end of the foam rubber end cap 14 in the clamp ring 302 and the pendulum 5 are located on the same arc with the first shaft body 4 as the center, and the driving arm 9 is matched with the limiter 12 to drive the connecting rod 8 to drive the pointer 7 to move on the horizontal scale 6 and quickly return to zero; Figure 3 As shown in (b), pull the operating head 134 of the second elastic latch 13 to make the second pin 131 and the swing rod 2 give way, swing the swing rod 2 to a horizontal state, and then release the operating head 134. Figure 3 As shown in (a), the second pin 131 extends under the swing rod 2 under the action of the second spring 132 to support the swing rod 2, that is, at this time, the swing rod 2 is in the position as shown in Figure 1 A position shown.

[0040] like Figure 4 As shown, when the operating head of the second elastic latch 13 is pulled out and the pendulum 5 is lowered, the pendulum 2 swings downward along with the pendulum 5 around the axial direction of the first shaft body 4. For example, when the pendulum 2 deflects to the B position, the end of the first pin 111 of the first elastic latch 11 slides relative to the end of the driving arm 9 until the first pin 111 compresses the first spring 112 through the first limiting boss 113, causing the first pin 111 to shrink. When the pendulum 2 deflects to the C position, because the driving arm 9 loses its contact with the first pin 111, the first pin 111 automatically extends into the bayonet 901 of the driving arm 9 under the elastic recovery of the first spring 112. At the same time, the pendulum 5 hits the end face of the foam end cap 14 for the first time from the center of the retaining ring 302.

[0041] like Figure 5 As shown, the pendulum 5 is rebounded by the foam rubber end cap 14, and swings with the axial reverse deflection of the pendulum 2 around the first shaft body 4. For example, when the pendulum 2 swings to the maximum height C position, because Figure 4 When it is in the B position, the first pin 111 has been inserted into the bayonet 901, which can push the driving arm 9 to synchronously deflect upward around the axial direction of the second shaft 10, and then the pointer 7 is pulled by the hinged connecting rod 8 to slide horizontally along the horizontal scale 6. When the pendulum 5 loses its potential energy and swings toward the foam end cap again, as shown in the D position, because the bayonet 901 has an opening on the side of the connecting rod 8, the first pin 111 can remove the bayonet 901 from the opening. Therefore, under the friction resistance between the pointer 7 and the horizontal scale 6, the driving arm 9 will not continue to swing downward with the pendulum 2, but stay at the maximum deflection angle, and the pointer 7 stays at the corresponding position of the horizontal scale 6. When it swings toward the foam end cap 14 for multiple collisions with gradually decreasing amplitude, it will not cause the pointer 7 to deviate, so the corresponding indication of the maximum swing of the pendulum 5 can be read, and the horizontal scale 6 is also convenient for reading, thereby improving accuracy.

[0042] After the test is finished, the clamping ring 302 can be removed from the foaming end cap to release the clamping and take off the foaming end cap. Therefore, the overall operation is simple and convenient, the structure is simple, the device cost is low, and it is suitable for promotion.

[0043] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the protection scope of the present invention. All equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A rubber elasticity testing rebound tester, comprising a bracket (1) and a pendulum (2), wherein a sample holder (3) is provided on the bracket (1), a first shaft (4) is provided between one end of the pendulum (2) and the bracket (1), and a pendulum (5) is provided at the other end of the pendulum (2) for striking the sample holder (3), characterized in that: The bracket (1) is provided with a transverse scale (6), the transverse scale (6) is provided with a pointer (7) that can slide horizontally, the pointer (7) is hinged with a connecting rod (8), the connecting rod (8) is hinged with a driving arm (9), a second shaft (10) is provided between one end of the driving arm (9) and the bracket (1), the other end of the driving arm (9) is provided with a bayonet (901) that opens toward one side of the connecting rod (8), and the rocker arm (2) is provided with a first elastic bayonet (11) that can cooperate with the bayonet (901).

2. The rubber elasticity testing hammer according to claim 1, characterized in that: The bracket (1) is provided with a limiter (12), the transverse scale (6) is provided with a zero position (601), and the limiter (12) can cooperate with the pointer (7) or the driving arm (9) to limit the pointer (7) from sliding out of the zero position (601).

3. The rubber elasticity testing hammer according to claim 1, characterized in that: The second shaft (10) is located above the first shaft (4), and one end of the driving arm (9) close to the bayonet (901) is arc-shaped.

4. The rubber elasticity testing hammer according to claim 1, characterized in that: The first elastic latch (11) comprises a first pin rod (111) and a first spring (112); a first limiting boss (113) is provided on the first pin rod (111); one end of the first pin rod (111) can extend into the bayonet (901); the other end of the first pin rod (111) passes through the first spring (112) and the swing rod (2) and is connected to a nut (114); and two ends of the first spring (112) are respectively in contact with the first limiting boss (113) and the swing rod (2).

5. The rubber elasticity testing hammer according to claim 1, characterized in that: The bracket (1) is provided with a second elastic latch (13), and the second elastic latch (13) is used to cooperate with the bottom of the swing rod (2) to limit the swing rod (2) from swinging downward.

6. The rubber elasticity testing hammer according to claim 5, characterized in that: The second elastic latch (13) comprises a second pin rod (131) and a second spring (132); a second limiting boss (133) is provided on the second pin rod (131); one end of the second pin rod (131) can extend below the swing rod (2); the other end of the second pin rod (131) passes through the second spring (132) and the bracket (1) and is connected to an operating head (134); two ends of the second spring (132) are respectively in contact with the second limiting boss (133) and the bracket (1); and the operating head (134) can cooperate with the bracket (1) in a limiting manner.

7. The rubber elasticity testing hammer according to any one of claims 1 to 6, characterized in that: The sample rack (3) comprises a base (301), a snap ring (302) and a third spring (303); a sample column (304) is arranged on the base (301); the snap ring (302) corresponds to the end of the sample column (304); there are at least two third springs (303) which are respectively located on both sides of the snap ring (302); one end of the third spring (303) is connected to the base (301), and the other end of the third spring (303) is connected to the snap ring (302).

8. The rubber elasticity testing hammer according to claim 7, characterized in that: The sample column (304) is a screw threadedly matched with the base (301).

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