High-precision spring fatigue testing device

Abstract

The utility model discloses a high precision spring fatigue test device, relates to the spring fatigue test technical field, and comprises a bottom plate and a fixed shell, the fixed shell is fixedly arranged in the middle of the upper surface of the bottom plate, the two sides of the fixed shell are respectively provided with a detection shell, the lower side of the detection shell is fixedly connected with the bottom plate through a connecting rod, and the connecting rod is fixedly connected with the bottom plate. An opening is formed in the end, away from the fixed shell, of the detection shell, an internal thread is formed in the opening, a plugging block is arranged in the opening in a threaded sleeving mode, a pressing block is slidably arranged in the detection shell, a transverse rod is fixedly arranged on the side, close to the fixed shell, of the pressing block, and through grooves are formed in the two ends of the fixed shell; one end of each transverse rod extends to the inner side of the fixing shell, and a transmission mechanism for driving the transverse rods on the two sides to move in a reciprocating mode is arranged in the fixing shell. According to the utility model, highly continuous spring fatigue test can be carried out, time wasted by resetting of the test mechanism is reduced, and work efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of spring fatigue testing, in particular to a high-precision spring fatigue testing device. Background Art

[0002] Spring fatigue characteristics are an important indicator of the quality of a spring. It refers to the fracture phenomenon caused by the spring being squeezed or stretched. Generally, cracks will appear in metals after deformation. They are usually very small and sometimes even negligible. However, if the deformation is frequent, the cracks will increase and the crack gaps will increase, eventually leading to spring fatigue. The spring fatigue testing machine mainly performs fatigue tests on springs by compressing or stretching the springs to obtain the fatigue characteristics of the tested springs, so that the appropriate springs can be used correctly in different applications.

[0003] Among them, the announcement number CN210347083U discloses a high-precision spring fatigue test device, including a test bench, a turntable is arranged on one side of the upper surface of the test bench, a rotating shaft is vertically arranged on the front of the turntable, the outer surface of the rotating shaft is movably hinged with a connecting rod, and vertical vertical plates are arranged on the front and back of the upper surface of the test bench, a slide rail is arranged on the top of the slide rail, and a fixing rod is arranged at one end of the slide rail away from the turntable. There are still defects in this technical solution:

[0004] In this technical solution, the turntable can only perform a single test action for one rotation, and the process of the turntable driving the connecting rod to move to the side away from the spring is an empty stroke, which will cause a waste of time, and then waste energy and reduce work efficiency. Utility Model Content

[0005] In view of the above problems existing in the existing high-precision spring fatigue testing device, the present utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a high-precision spring fatigue testing device, which solves the problem that in the high-precision spring fatigue testing device in the prior art, the turntable can only perform a single test action after one rotation, and the process of the turntable driving the connecting rod to move to the side away from the spring is an empty stroke, which will cause time to be wasted, and then waste energy and reduce work efficiency.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A high-precision spring fatigue testing device comprises a base plate and a fixed shell, characterized in that the fixed shell is fixedly arranged in the middle of the upper surface of the base plate, detection shells are arranged on both sides of the fixed shell, the lower side of the detection shell is fixedly connected to the base plate through a connecting rod, an opening is provided at one end of the detection shell away from the fixed shell, an internal thread is provided inside the opening and a blocking block is threadedly sleeved, a pressure block is slidably arranged inside the detection shell, a cross bar is fixedly arranged on the side of the pressure block close to the fixed shell, through grooves are provided at both ends of the fixed shell, one end of the cross bar extends to the inner side of the fixed shell, and a transmission mechanism for driving the cross bars on both sides to move back and forth is provided inside the fixed shell.

[0009] Preferably, the transmission mechanism includes an incomplete gear and a rack, a movable frame is slidably arranged inside the fixed shell, one end of the two cross bars are fixedly connected to one end of the corresponding movable frame, a rotating rod is rotatably arranged inside the fixed shell, the incomplete gear is fixedly sleeved on the rod wall of the rotating rod, the two racks are respectively fixedly arranged on the inner walls on both sides of the movable frame, the incomplete gear is meshed with the rack on one side, a motor is fixedly arranged on the rear side of the fixed shell, and the output end of the motor is fixedly connected to one end of the rotating rod.

[0010] Preferably, both inner walls of the fixed shell are provided with sliding grooves, a sliding rod is fixedly provided inside the sliding groove, a sliding block is movably sleeved on the rod wall of the sliding rod, and one side of the sliding block is fixedly connected to the movable frame.

[0011] Preferably, a rotating wheel is fixedly sleeved on one outer end of the blocking block.

[0012] Preferably, the motor is fixedly connected to the outer wall of the fixed shell via a support frame.

[0013] Preferably, a plurality of exhaust holes are provided on the side wall of the detection shell.

[0014] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0015] The utility model puts two springs into corresponding detection shells, and then uses a blocking block to block the detection shells. Then a motor drives a rotating rod to rotate, and the rotating rod drives an incomplete gear to rotate. The incomplete gear meshes with racks on both sides in turn, and can drive a movable frame to move back and forth, thereby making the two cross bars drive the corresponding pressure blocks to move back and forth, so that the two pressure blocks repeatedly squeeze the corresponding springs, and can realize highly continuous spring fatigue test, reduce the time wasted in resetting the test mechanism, and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 This is a structural schematic diagram of a high-precision spring fatigue testing device proposed by the utility model;

[0018] Figure 2 for Figure 1 A rear view structural diagram of ;

[0019] Figure 3 for Figure 1 Schematic diagram of the enlarged structure of part A in the middle.

[0020] Description of reference numerals:

[0021] 1. Bottom plate; 2. Fixed shell; 3. Movable frame; 4. Detection shell; 5. Press block; 6. Cross bar; 7. Blocking block; 8. Motor; 9. Connecting rod; 10. Incomplete gear; 11. Slider; 12. Sliding rod; 13. Rack; 14. Rotating rod. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] The utility model embodiment discloses a high-precision spring fatigue testing device.

[0024] Embodiment 1

[0025] Reference Figure 1-3 A high-precision spring fatigue testing device comprises a base plate 1 and a fixed shell 2, the fixed shell 2 is fixedly arranged in the middle of the upper surface of the base plate 1, and detection shells 4 are arranged on both sides of the fixed shell 2. The lower side of the detection shell 4 is fixedly connected to the base plate 1 through a connecting rod 9, and an opening is opened at one end of the detection shell 4 away from the fixed shell 2. An internal thread is opened inside the opening and a sealing block 7 is threadedly sleeved. A rotating wheel is fixedly sleeved at one end of the outer side of the sealing block 7 to facilitate the rotation of the sealing block 7. A pressing block 5 is slidingly arranged inside the detection shell 4, and a cross bar 6 is fixedly arranged on one side of the pressing block 5 close to the fixed shell 2. Through grooves are opened at both ends of the fixed shell 2, and one end of the cross bar 6 extends to the inner side of the fixed shell 2. A plurality of exhaust holes are opened on the side wall of the detection shell 4, so that the pressing block 5 can slide smoothly in the detection shell 4.

[0026] Embodiment 2

[0027] Reference Figure 1-3A transmission mechanism for driving the two side cross bars 6 to reciprocate is arranged inside the fixed shell 2, and the transmission mechanism includes an incomplete gear 10 and a rack 13. A movable frame 3 is slidingly arranged inside the fixed shell 2, and one end of the two cross bars 6 is fixedly connected to one end of the corresponding movable frame 3. A rotating rod 14 is rotatably arranged inside the fixed shell 2. The incomplete gear 10 is fixedly sleeved on the rod wall of the rotating rod 14. The two racks 13 are respectively fixedly arranged on the inner walls of the two sides of the movable frame 3. The incomplete gear 10 is meshed and connected with the rack 13 on one side. A motor 8 is fixedly arranged on the rear side of the fixed shell 2, and the output end of the motor 8 is fixedly connected to one end of the rotating rod 14. The motor 8 is fixedly connected to the outer wall of the fixed shell 2 through a support frame, so that the connection between the motor and the fixed shell 2 is more stable.

[0028] Embodiment 3

[0029] Reference Figure 1-3 The inner walls on both sides of the fixed shell 2 are provided with sliding grooves, and a sliding rod 12 is fixedly arranged inside the sliding groove. A slider 11 is movably sleeved on the rod wall of the sliding rod 12, and one side of the slider 11 is fixedly connected to the movable frame 3, so that the movable frame 3 can slide stably.

[0030] In the utility model, when in use, two springs are placed in the corresponding detection shells 4, and then the detection shells 4 are blocked with the blocking block 7, and then the motor 8 drives the rotating rod 14 to rotate, and the rotating rod 14 drives the incomplete gear 10 to rotate, and the incomplete gear 10 is meshed with the racks 13 on both sides in turn, that is, it can drive the movable frame 3 to move back and forth, and then the two cross bars 6 drive the corresponding pressure blocks 5 to move back and forth, that is, the two pressure blocks 5 repeatedly squeeze the corresponding springs, that is, it can achieve highly continuous spring fatigue testing, reduce the time wasted in resetting the test mechanism, and improve work efficiency.

[0031] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-precision spring fatigue testing device, comprising a base plate (1) and a fixed shell (2), characterized in that: The fixed shell (2) is fixedly arranged at the middle part of the upper surface of the bottom plate (1); detection shells (4) are arranged on both sides of the fixed shell (2); the lower side of the detection shell (4) is fixedly connected to the bottom plate (1) through a connecting rod (9); an opening is provided at one end of the detection shell (4) away from the fixed shell (2); an internal thread is provided inside the opening and a blocking block (7) is threadedly sleeved thereon; a pressure block (5) is slidably arranged inside the detection shell (4); a cross bar (6) is fixedly arranged on one side of the pressure block (5) close to the fixed shell (2); through grooves are provided at both ends of the fixed shell (2); one end of the cross bar (6) extends to the inner side of the fixed shell (2); and a transmission mechanism for driving the cross bars (6) on both sides to move back and forth is provided inside the fixed shell (2).

2. The high-precision spring fatigue testing device according to claim 1, characterized in that: The transmission mechanism comprises an incomplete gear (10) and a rack (13); a movable frame (3) is slidably arranged inside the fixed shell (2); one end of each of the two cross bars (6) is fixedly connected to one end of the corresponding movable frame (3); a rotating rod (14) is rotatably arranged inside the fixed shell (2); the incomplete gear (10) is fixedly sleeved on the rod wall of the rotating rod (14); the two racks (13) are respectively fixedly arranged on the inner walls of both sides of the movable frame (3); the incomplete gear (10) is meshedly connected with one side of the rack (13); a motor (8) is fixedly arranged on the rear side of the fixed shell (2); and the output end of the motor (8) is fixedly connected to one end of the rotating rod (14).

3. The high-precision spring fatigue testing device according to claim 2, characterized in that: The inner walls on both sides of the fixed shell (2) are provided with sliding grooves, a sliding rod (12) is fixedly arranged inside the sliding groove, a sliding block (11) is movably sleeved on the rod wall of the sliding rod (12), and one side of the sliding block (11) is fixedly connected to the movable frame (3).

4. The high-precision spring fatigue testing device according to claim 1, characterized in that: A rotating wheel is fixedly sleeved on one outer end of the blocking block (7).

5. The high-precision spring fatigue testing device according to claim 2, characterized in that: The motor (8) is fixedly connected to the outer wall of the fixed shell (2) via a support frame.

6. The high-precision spring fatigue testing device according to claim 1, characterized in that: The side wall of the detection shell (4) is provided with a plurality of exhaust holes.

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