Elastomer fatigue test equipment for weighing equipment

Abstract

The utility model relates to an elastomer fatigue test device used on a weighing device, which comprises a device body, the device body comprises a placing rack, the top of a bottom plate in the placing rack is fixedly provided with a test cylinder, an elastomer is placed in the test cylinder, a product is not contacted with the inner circumferential wall of the test cylinder, and the elastic body is placed in the test cylinder. A telescopic part is arranged at the bottom of a top plate in the placing frame, a pressing plate is arranged at the telescopic end in the telescopic part, the pressing plate directly faces an elastic body placed in the testing cylinder, and two first through holes are symmetrically formed in the peripheral surface of the testing cylinder. The utility model relates to the technical field of elastomer pressure resistance test equipment. According to the utility model, the elastic body does not need to be manually staring at the state all the time, operators are liberated, and meanwhile, the accuracy of test results is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of elastomer pressure resistance testing equipment, and in particular to an elastomer fatigue testing equipment for use on weighing equipment. Background Technology

[0002] Elastomers are materials that can return to their original shape after the removal of external force. Elastomers are used extensively in weighing equipment.

[0003] To ensure the quality of weighing equipment, one aspect is to test the elastomers used in it, the most common test being the elastomer fatigue test.

[0004] Chinese patent CN206192802U discloses a high-efficiency elastomer fatigue life testing device, including a base frame, an elastomer sample, and a power unit, a crankshaft connecting rod linkage unit, and a sample clamping unit mounted on the base frame. The crankshaft connecting rod linkage unit includes a crankshaft, a fork-shaped connecting rod, a rotating shaft, a bearing, a bearing housing, and a bearing cover. The crankshaft is supported and mounted on the bearing housing by the bearing. The central section of the crankshaft is connected to the power unit, and the eccentric section of the crankshaft is connected to the rod end of the fork-shaped connecting rod through the bearing to realize the horizontal reciprocating motion of the fork-shaped connecting rod.

[0005] The patent description states, "The process flow is as follows: prepare the elastomer sample → install the elastomer sample on the sample clamping unit → test rotation device → start the motor → record the testing time → observe whether the elastomer to be tested sheds powder → calculate the number of fatigue test cycles → end the experiment." This requires manual observation of whether the elastomer sheds powder. Since testing a single elastomer is time-consuming, if the operator is not at their post for a period of time or does not carefully observe the elastomer, the time of elastomer damage and the number of compression cycles cannot be accurately recorded, leading to reduced test accuracy. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an elastomer fatigue testing device for weighing equipment, which can eliminate the need for manual monitoring of the elastomer, freeing up operators while ensuring the accuracy of test results.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0008] An elastomer fatigue testing device for weighing equipment includes a device body, the device body including a placement frame, a test cylinder fixedly installed on the top of the bottom plate of the placement frame, an elastomer placed inside the test cylinder, the product not in contact with the inner peripheral wall of the test cylinder, a telescopic part provided at the bottom of the top plate of the placement frame, a pressure plate provided at the telescopic end of the telescopic part, the pressure plate facing the elastomer placed inside the test cylinder, and two first through holes symmetrically opened on the outer peripheral surface of the test cylinder;

[0009] It also includes a failure monitoring component, which includes a laser emitter and a laser receiver. The laser emitter and the laser receiver are respectively disposed at the corresponding first through hole, and the laser emitter and the laser receiver are at the same height.

[0010] In a preferred embodiment, the present invention can be further configured such that: a lifting assembly is provided on the bottom plate of the placement frame, and the lifting assembly simultaneously changes the height of the laser emitting end and the laser receiving end.

[0011] In a preferred embodiment, the present invention can be further configured as follows: the lifting assembly includes two frames, which are symmetrically fixed on the top of the base plate of the placement frame, and both sides of the frames facing the test cylinder are processed into an open shape;

[0012] Each of the frames is slidably provided with a placement plate, and a sleeve is fixedly provided on the top of the placement plate. The laser emitting end and the laser receiving end are both passed through the corresponding sleeve.

[0013] Each of the frames has a motor installed at the top of its base plate, and a screw is installed at the output end of the motor. The screw passes through the corresponding placement plate, and the placement plate is threadedly connected to the corresponding screw.

[0014] Each of the frames is provided with a first fixing rod at the top and bottom, one end of the first fixing rod extends into the corresponding screw, and the first fixing rod is rotatably connected to the corresponding screw.

[0015] In a preferred embodiment, the present invention can be further configured such that: two sliding grooves are symmetrically opened on both sides of the inner wall of each frame, and sliding blocks are fixedly provided on both sides of the sleeve, the sliding blocks are located in the corresponding sliding grooves, and the sliding blocks are slidably connected to the corresponding sliding grooves;

[0016] Each of the grooves is vertically provided with a guide rod, which passes through the corresponding sliding block and is slidably connected to the corresponding sliding block.

[0017] In a preferred embodiment, the present invention can be further configured such that the sleeve is connected to either the laser transmitter or the laser receiver via a locking nut.

[0018] In a preferred embodiment, the present invention can be further configured such that one end of the laser emitting end and one end of the laser receiving end are both located inside the corresponding first through hole.

[0019] In summary, this utility model has at least one of the following beneficial technical effects:

[0020] 1. By setting up a failure monitoring component, the ability of the laser receiver to continuously receive signals from the laser transmitter is used as the basis for judging whether the elastomer has failed. This eliminates the need for manual monitoring of the elastomer's status, freeing up operators while ensuring the accuracy of test results.

[0021] 2. By incorporating a lifting assembly, the position and height of the laser emitter and receiver can be adjusted according to actual conditions, thereby expanding the usability of the equipment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the entire half-section structure of this embodiment;

[0023] Figure 2 yes Figure 1 Enlarged structural diagram at point A in the middle.

[0024] In the figure, 1. Equipment body; 11. Placement rack; 12. Test cylinder; 13. Pressure plate; 2. First through hole; 3. Failure monitoring component; 31. Laser emitter; 32. Laser receiver; 4. Lifting component; 41. Frame; 42. Placement plate; 43. Sleeve; 44. Motor; 45. Screw; 46. First fixing rod; 5. Slide groove; 51. Sliding block; 52. Guide rod. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Example:

[0027] Reference Figures 1-2 As shown, this utility model discloses an elastomer fatigue testing device for weighing equipment, including a device body 1. The device body 1 includes a placement frame 11, and a placement plate 42 including a top plate, a bottom plate, and a vertical plate connecting the top plate and the bottom plate.

[0028] A test cylinder 12 is fixedly mounted on the top of the base plate of the placement rack 11. A tray is placed inside the test cylinder 12. The shape of the tray matches the shape of the inner hole of the test cylinder 12. The elastomer is placed on the tray, with the elastomer positioned at the center inside the test cylinder 12. The product does not contact the inner peripheral wall of the test cylinder 12. The test cylinder 12 is selected according to the size of the elastomer to ensure that the elastomer will not come into contact with the inner peripheral wall of the test cylinder 12 during the test.

[0029] The bottom of the top plate of the placement frame 11 is provided with a telescopic part, and the telescopic end of the telescopic part is provided with a pressure plate 13, which faces the elastic body placed inside the test cylinder 12. The cross-sectional shape of the pressure plate 13 is adapted to the cross-sectional shape of the inner hole of the test cylinder 12.

[0030] The main body of the equipment 1 is also equipped with a PLC controller (not shown in the figure), which controls the telescopic part through a program.

[0031] The outer circumference of the test cylinder 12 has two first through holes 2 symmetrically opened, and both first through holes 2 are set vertically.

[0032] The device body 1 also includes a failure monitoring component 3, which includes a laser emitter 31 and a laser receiver 32. A lifting component 4 is provided on the bottom plate of the placement rack 11, which simultaneously changes the height of the laser emitter 31 and the laser receiver 32.

[0033] The lifting assembly 4 includes two frames 41, which are symmetrically fixed on the top of the base plate in the placement frame 11. Both sides of the frames 41 facing the test cylinder 12 are machined into an open shape.

[0034] Each frame 41 has a sliding plate 42. Two symmetrical grooves 5 are formed on both sides of the inner wall of each frame 41. Sliding blocks 51 are fixedly installed on both sides of the sleeve 43, each sliding block 51 located within its corresponding groove 5 and slidably connected to it. A guide rod 52 is vertically installed within each groove 5, passing through the corresponding sliding block 51 and slidably connected to it.

[0035] A sleeve 43 is fixedly installed on the top of the placement plate 42, and the laser emitting end 31 and the laser receiving end 32 are both inserted through the corresponding sleeve 43. The sleeve 43 is connected to the laser emitting end 31 or the laser receiving end 32 by a lock nut.

[0036] One end of the laser emitting end 31 and one end of the laser receiving end 32 are both located inside the corresponding first through hole 2, and the laser emitting end 31 and the laser receiving end 32 are at the same height.

[0037] Each frame 41 has a motor 44 installed at the top of its base plate. The output end of the motor 44 is equipped with a screw 45, which passes through the corresponding placement plate 42 and is threadedly connected to the corresponding screw 45. Each frame 41 also has a first fixing rod 46 installed at its top and bottom. One end of the first fixing rod 46 extends into the corresponding screw 45, and the first fixing rod 46 is rotatably connected to the corresponding screw 45.

[0038] An alarm is installed on the top of one of the frames 41. The PLC controller controls two motors 44 through a program, making the two motors 44 move synchronously at the same speed.

[0039] The PLC controller also controls the opening and closing of the laser transmitter 31 and the laser receiver 32.

[0040] The laser transmitter 31, the laser receiver 32, and the alarm are all electrically connected.

[0041] The implementation principle of the above embodiments is as follows:

[0042] When an elastomer fails, the deformed elastomer cannot return to its initial shape.

[0043] The operator first adjusts the position and height of the laser receiver 32 and the laser emitter 31 according to the height of the elastic body.

[0044] Connect the power supply and start the PLC controller. The PLC controller starts two motors 44, which drive the corresponding screws 45 to rotate. The screws 45 drive the placement plate 42 to move along the height of the bolts. The placement plate 42 drives the laser emitter 31 or laser receiver 32 on it to move. The two motors 44 rotate at the same speed and in the same direction, making the laser emitter 31 and laser receiver 32 at the same height.

[0045] Next, the operator places the elastomer on the tray inside the test cylinder 12 and uses glue to fix the bottom of the elastomer to the tray.

[0046] When placing the elastomer, it is important to position it as close to the center of the test cylinder 12 as possible. The laser emitter 31 should be positioned slightly below the top of the elastomer, approximately one centimeter below its height.

[0047] After the elastomer is placed, the PLC controller activates the telescopic mechanism, which drives the pressure plate 13 to move towards the inside of the test cylinder 12. The pressure plate 13 slowly and uniformly presses down. After the pressure plate 13 touches the elastomer, it continues to compress the elastomer. The elastomer deforms but does not contact the inner wall of the test cylinder 12. As the pressure plate 13 continues to press down, there is no elastomer obstructing the laser emitting end 31 and the laser receiving end 32.

[0048] After the pressure plate 13 moves to a certain depth, the top of the elastic body is positioned one centimeter below the laser emitter 31. The telescopic rod in the telescoping device returns to its initial position and waits for approximately five seconds. The initial position of the pressure plate 13 is directly above the test cylinder 12.

[0049] Then the telescopic device continues to move the pressure plate 13 into the test cylinder 12, and this process is repeated. The computer connected to the PLC controller counts the number of times the telescopic device is pressed down.

[0050] If the laser receiver 32 continuously receives the signal light emitted by the laser transmitter 31 for more than five seconds, the alarm will be activated. After the alarm is activated, the PLC controller will shut down the telescopic device. After observing the number of times the elastomer has been compressed, the operator will replace it with a new elastomer for testing.

[0051] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. An elastomer fatigue testing device for weighing equipment, comprising a device body (1), characterized in that, The device body (1) includes a placement frame (11). A test cylinder (12) is fixedly installed on the top of the bottom plate of the placement frame (11). An elastomer is placed inside the test cylinder (12). The product does not contact the inner circumferential wall of the test cylinder (12). A telescopic part is provided at the bottom of the top plate of the placement frame (11). A pressure plate (13) is provided at the telescopic end of the telescopic part. The pressure plate (13) faces the elastomer placed inside the test cylinder (12). Two first through holes (2) are symmetrically opened on the outer circumference of the test cylinder (12). It also includes a failure monitoring component (3), which includes a laser emitting end (31) and a laser receiving end (32). The laser emitting end (31) and the laser receiving end (32) are respectively located at the corresponding first through hole (2), and the laser emitting end (31) and the laser receiving end (32) are at the same height.

2. The elastomer fatigue testing device for weighing equipment according to claim 1, characterized in that: The placement rack (11) has a lifting assembly (4) on its base plate, which simultaneously changes the height of the laser emitting end (31) and the laser receiving end (32).

3. The elastomer fatigue testing device for weighing equipment according to claim 2, characterized in that: The lifting assembly (4) includes two frames (41), which are symmetrically fixed on the top of the bottom plate of the placement frame (11). The two sides of the frames (41) facing the test cylinder (12) are both processed into an open shape. Each of the frames (41) has a sliding plate (42) inside it, and a sleeve (43) is fixedly installed on the top of the placement plate (42). The laser emitting end (31) and the laser receiving end (32) are both installed on the corresponding sleeve (43). Each of the frames (41) has a motor (44) on the top of the bottom plate, and a screw (45) is provided at the output end of the motor (44). The screw (45) passes through the corresponding placement plate (42), and the placement plate (42) is threadedly connected to the corresponding screw (45). Each of the frames (41) is provided with a first fixing rod (46) at the top and bottom. One end of the first fixing rod (46) extends into the corresponding screw (45), and the first fixing rod (46) is rotatably connected to the corresponding screw (45).

4. The elastomer fatigue testing device for weighing equipment according to claim 3, characterized in that: Two sliding grooves (5) are symmetrically opened on both sides of the inner wall of each frame (41). Sliding blocks (51) are fixedly provided on both sides of the sleeve (43). The sliding blocks (51) are located in the corresponding sliding grooves (5) and are slidably connected to the corresponding sliding grooves (5). Each of the grooves (5) is vertically provided with a guide rod (52), which passes through the corresponding sliding block (51) and is slidably connected to the corresponding sliding block (51).

5. The elastomer fatigue testing device for weighing equipment according to claim 4, characterized in that: The sleeve (43) is connected to the laser emitting end (31) or the laser receiving end (32) by a locking nut.

6. The elastomer fatigue testing device for weighing equipment according to claim 1, characterized in that: One end of the laser emitting end (31) and one end of the laser receiving end (32) are both located inside the corresponding first through hole (2).

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