Elastomer crack propagation testing device

Abstract

According to the elastomer crack propagation testing device, rotation of a screw rod is controlled through synchronous rotation of a driving gear and a driven gear, so that clamping and loosening effects can be rapidly achieved by a clamping plate. The handle is arranged on the driving gear, so that the clamping and loosening effects of the clamping plate do not need to depend on other tools any more, the rotating angle of the handle is adjustable, and the observation view of the detection piece is prevented from being blocked. The device is simple in structure and convenient to operate, and the test efficiency in the crack propagation test process can be remarkably improved.

Description

Technical Field

[0001] The present application relates to the technical field of crack extension testing, and in particular to an elastomer crack extension testing device. Background Art

[0002] The clamping plate of the crack extension test device in the prior art is usually connected and fixed to the fixed plate by a screw, and the movable plate is clamped to the fixed plate by rotating the screw. However, the multiple screws in the prior art need to be rotated in turn, which is very inconvenient. When the time needs to be adjusted after installation, the movable plates have to be rotated one by one, which makes the movable plates loose, causing the test personnel to often start the test without fully screwing, which leads to insufficient or uneven clamping force. Utility Model Content

[0003] In order to solve the problems raised in the background technology, the purpose of the present application is to provide an elastomer crack propagation testing device, which can reduce the operation process and improve efficiency by operating one of the screws to enable all the screws to rotate accordingly.

[0004] The present application provides an elastic body crack extension test device adopting the following technical solution: comprising a crack extension test device, the clamping plate of the crack extension test device comprises a fixed plate and a movable plate, and the fixed plate and the movable plate are connected by a plurality of screws. At least one screw is connected to a driving gear at the end face away from the clamping plate, and the other screws are connected to a driven gear rotating with the driving gear at the end face on the same side as the driving gear, and the end face of the driving gear away from the screw is provided with a handle

[0005] Preferably, the driving gear is located in the middle of the clamping plate

[0006] Preferably, the thread directions of two adjacent screws are opposite, and the driving gear is meshed with the driven gear.

[0007] Preferably, the thread directions of two adjacent screw rods are the same, and the driving gear is connected to the driven gear through a chain.

[0008] Preferably, a plurality of first protrusions are arranged at intervals along the circumferential direction on the end surface of the driving gear away from the screw rod, and a plurality of second protrusions cooperating with the plurality of first protrusions are arranged at intervals along the circumferential direction on the end surface of the handle facing the driving gear, and the plurality of first protrusions mesh with the plurality of second protrusions.

[0009] Preferably, a spring is rotatably connected between the handle and the driving gear, one end of the spring is connected to the middle of the plurality of first protrusions, and the other end of the spring is connected to the middle of the plurality of second protrusions.

[0010] Preferably, the telescopic rod is connected to a motor, and one end of the telescopic rod away from the clamping plate is connected to an output shaft of the motor.

[0011] In summary, the present application includes the following beneficial technical effects: gears are set to connect multiple screws, and the driven gear is driven to rotate by rotating the driving gear, so that multiple screws can rotate synchronously, achieving simultaneous locking and relaxation, and improving the adjustment process of the clamping work. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the front view of the utility model;

[0013] Figure 2 It is a front view of the upper clamping plate of the utility model;

[0014] Figure 3 It is a front view of the lower clamping plate of the utility model;

[0015] Figure 4 It is a structural diagram of the connection between the handle and the driving gear.

[0016] Description of reference numerals:

[0017] 1. Telescopic rod; 2. Clamping plate; 210. Upper clamping plate; 211. Fixed plate of upper clamping plate; 212. Movable plate of upper clamping plate; 220. Lower clamping plate; 3. Driving gear; 301. First protrusion; 4. Driven gear; 5. Handle; 501. Second protrusion; 6. Motor. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present utility model.

[0019] The following is combined with Figure 1-Figure 4 The present application is further described in detail. The embodiment of the present application discloses an elastomer crack extension test device. It includes a crack extension test device, the clamping plate 2 of the crack extension test device includes a fixed plate and a movable plate, the fixed plate and the movable plate are connected by a plurality of screws, at least one screw is connected to a driving gear 3 at the end face away from the movable plate, and the other screws are connected to a driven gear 4 that rotates with the driving gear 3 at the end face on the same side as the driving gear 3. The driven gear 4 is driven to rotate by rotating the driving gear 3, and the screw can rotate synchronously to control the movable plate to be clamped to the fixed plate or to make the movable plate away from the loose plate. The driving gear 3 and the driven gear 4 can be located on either side of the two outer sides of the clamping plate 2, and the effect is not affected by being close to the fixed plate or close to the movable plate. A handle 5 is provided on the end face of the driving gear 3 away from the screw.

[0020] The driving gear 3 is located in the middle of the clamping plate 2 , so that the operator can have a good field of vision to observe the state of the detection member clamped by the clamping plate 2 no matter whether the operator uses the left hand or the right hand to rotate the handle 5 .

[0021] There are two ways in which the driving gear 3 drives the driven gear 4 to rotate. Figure 2 The first method is that the thread directions of two adjacent screws are opposite, and the driving gear 3 is meshed with the driven gear 4. This method has a more uniform clamping force.

[0022] Please refer to Figure 3 Different from the first method, the other method is that the thread directions of two adjacent screws are the same, and the driving gear 3 is connected to the driven gear 4 through a chain, and this method can use fewer gears. Both methods can be used alone or in combination.

[0023] The end surface of the driving gear 3 away from the screw rod is provided with a plurality of first protrusions 301 at intervals along the circumferential direction, and the end surface of the handle 5 facing the driving gear 3 is provided with a plurality of second protrusions 501 at intervals along the circumferential direction to cooperate with the plurality of first protrusions 301, and the plurality of first protrusions 301 mesh with the plurality of second protrusions 501. In order to prevent the handle 5 from blocking the field of vision after being rotated and locked, the handle 5 and the driving gear 3 are provided with a detachable connection mode, and when in use, the plurality of second protrusions 501 of the handle 5 are inserted into the intervals between the plurality of first protrusions 301 of the driving gear 3 to achieve meshing, and after the rotation is completed, the handle 5 is directly removed or replaced to an angle that does not block the field of vision and reinserted into the driving gear 3.

[0024] A spring is rotatably connected between the handle 5 and the driving gear 3, one end of the spring is connected to the middle of the plurality of first protrusions 301, and the other end of the spring is connected to the middle of the plurality of second protrusions 501, so that after the handle 5 adjusts its angle to release the obstruction to the detection member, the spring pulls back the driving gear 3, thereby adjusting the position of the handle 5 and facilitating the next rotation operation.

[0025] The telescopic rod 1 of the crack extension test device is connected to a motor 6, a threaded hole is provided on the end face of the output shaft of the motor 6 away from the motor 6, a corresponding threaded hole is provided on the fixed plate of the clamping plate 2, and the output shaft of the motor 6 is connected to the fixed plate of the clamping plate 2 by a screw, thereby adding a rotation test function to the crack extension test device.

[0026] Working principle: Turn the handle 5 to rotate the driving gear 3, drive the driven gear 4 to rotate, and then rotate the screw connected to the driving gear 3 and the driven gear 4, so that the movable plate is away from the fixed plate, and the two sides of the detection part are respectively placed between the fixed plate and the movable plate of the upper clamping plate and the lower clamping plate, and the handle 5 is turned to move the movable plate toward the fixed plate to achieve clamping. After clamping, if the handle 5 blocks the observation field, pull the handle 5 away from the driving gear 3 to disengage the multiple first protrusions 301 and the multiple second protrusions 501, then turn the handle 5 to an angle that does not block the observation field, release the handle 5, and the handle 5 moves toward the driving gear 3 under the tension of the spring.

[0027] After the crack extension test device is started, the test function of rotating the detection piece is realized through the motor 6 on the basis of the original stretching function.

[0028] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, and may be located in one place or distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0029] In the present application, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation", "screw-on" 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 an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in this application according to the specific circumstances.

[0030] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and concept of the present application, and all these changes or substitutions should fall within the protection scope of the claims attached to the present application.

Claims

1. An elastic body crack extension test device, comprising a crack extension test device, wherein the clamping plate (2) of the crack extension test device comprises a fixed plate and a movable plate, the fixed plate and the movable plate are connected by a plurality of screws, characterized in that: At least one screw rod is connected to a driving gear (3) at its end face away from the clamping plate (2), and the other screw rods are connected to driven gears (4) rotating along with the driving gear (3) at their end faces on the same side as the driving gear (3), and a handle (5) is provided on the end face of the driving gear (3) away from the screw rod.

2. The elastic body crack extension testing device according to claim 1, characterized in that: The driving gear (3) is located in the middle of the clamping plate (2).

3. The elastic body crack extension testing device according to claim 1, characterized in that: The thread directions of two adjacent screw rods are opposite, and the driving gear (3) is meshed with the driven gear (4).

4. The elastic body crack growth test device according to claim 1, characterized in that: The thread directions of two adjacent screw rods are the same, and the driving gear (3) is connected to the driven gear (4) via a chain.

5. The elastic body crack growth test device according to claim 1, characterized in that: The end surface of the driving gear (3) away from the screw rod is provided with a plurality of first protrusions (301) at intervals along the circumferential direction, and the end surface of the handle (5) facing the driving gear (3) is provided with a plurality of second protrusions (501) matching the plurality of first protrusions (301) at intervals along the circumferential direction, and the plurality of first protrusions (301) are meshed with the plurality of second protrusions (501).

6. The elastic body crack growth test device according to claim 5, characterized in that: A spring is rotatably connected between the handle (5) and the driving gear (3), one end of the spring is connected to the middle of the plurality of first protrusions (301), and the other end of the spring is connected to the middle of the plurality of second protrusions (501).

7. The elastic body crack growth test device according to claim 1, characterized in that: The telescopic rod (1) of the crack extension test device is connected to a motor (6); a threaded hole is provided on the end face of the output shaft of the motor (6) away from the motor (6); a corresponding threaded hole is provided on the fixing plate of the clamping plate (2); and the output shaft of the motor (6) is connected to the fixing plate of the clamping plate (2) via a screw.

Images