Fatigue testing machine for automobile spring

Abstract

The utility model relates to a fatigue testing machine for an automobile spring, and the fatigue testing machine comprises a rack, an upper pressing plate and a lower pressing plate are installed on the rack in a sliding manner, clamping assemblies are arranged on the upper pressing plate and the lower pressing plate, each clamping assembly comprises a rotating part and a clamping plate, the clamping plates are installed on the lower pressing plate in a sliding manner, the rotating parts are arranged on the lower pressing plate, and the clamping plates are arranged on the rotating parts. The clamping assemblies on the two sides are oppositely distributed, and a driving mechanism is arranged on the rack. A spring is placed between the upper pressing plate and the lower pressing plate, at the moment, the rotating piece drives the clamping plates on the two sides to clamp the spring, the clamping plates on the upper pressing plate and the clamping plates on the lower pressing plate clamp the two ends of the spring respectively, at the moment, the driving mechanism drives the lower pressing plate to slide in a reciprocating mode to conduct fatigue testing, and the spring is limited and clamped through the clamping plates; the spring clamping device has the good effect of clamping springs with different outer diameters.

Description

Technical Field

[0001] This application relates to the field of spring fatigue testing machines, and more particularly to a fatigue testing machine for automotive springs. Background Technology

[0002] The spring fatigue testing machine consists of a motor, a reducer, and a cam that drives a connecting rod in a reciprocating motion to compress the spring. It is mainly used for low-frequency fatigue performance testing of various helical springs.

[0003] In related technologies, reference can be made to utility model patent CN215492324U, which discloses a spring fatigue testing machine, including a base, on which are provided several lower fixed seats arranged in a straight line. The base has a support side plate on one side of the lower fixed seats, and a lifting plate is connected to the support side plate through a lifting mechanism. Several lifting seats are slidably installed on the lifting plate, and the lifting seats are set perpendicular to the lifting plate and can slide up and down relative to the lifting plate. The bottom end of each lifting seat is provided with an upper fixed seat, and the positions of the upper fixed seats and the lower fixed seats correspond one-to-one. A controller is provided on the base, and the lifting mechanism is electrically connected to the controller. The spring fatigue testing machine can effectively improve the efficiency of spring fatigue testing.

[0004] In the aforementioned related technologies, the limiting space of the upper and lower fixed seats is limited. When testing springs with different outer diameters, in order to ensure testing accuracy, it is necessary to replace the upper and lower fixed seats with the corresponding sizes before conducting fatigue testing. This makes the fatigue testing of springs inconvenient. Utility Model Content

[0005] To address the inconvenience of using a single device for fatigue testing of springs with different outer diameters, this application provides a fatigue testing machine for automotive springs.

[0006] The fatigue testing machine for automotive springs provided in this application adopts the following technical solution:

[0007] A fatigue testing machine for automotive springs includes a frame on which an upper pressure plate and a lower pressure plate are slidably mounted. The upper and lower pressure plates are parallel to each other. A clamping assembly is provided on the side of the lower pressure plate facing the upper pressure plate. The clamping assembly includes a rotating member and a clamping plate. The clamping plate is slidably mounted on the lower pressure plate. Two clamping plates are provided and distributed opposite to each other. The clamping plates on both sides form a clamping space for clamping the spring. The rotating member is provided on the lower pressure plate and is used to drive the clamping plates on both sides to slide in opposite directions. The upper pressure plate has the same clamping assembly on the side facing the lower pressure plate. The clamping assemblies on both sides are distributed opposite to each other. A driving mechanism is provided on the frame for driving the lower pressure plate to reciprocate in the direction of sliding towards or away from the upper pressure plate.

[0008] By adopting the above technical solution, the spring is placed between the upper pressure plate and the lower pressure plate. At this time, the rotating component drives the clamping plates on both sides to clamp the spring. The clamping plates on the upper and lower pressure plates clamp the two ends of the spring respectively. At this time, the driving mechanism drives the lower pressure plate to slide back and forth to perform fatigue testing. The clamping plates limit the clamping of the spring, which has a good clamping effect on springs with different outer diameters and the testing operation is convenient.

[0009] Optionally, the rotating component includes a rotating frame and a connecting rod. The rotating frame is rotatably mounted on the lower pressure plate. The rotation axis of the rotating frame is perpendicular to the plane of the lower pressure plate. The connecting rod is disposed on the rotating frame and rotatably connected to the rotating frame. One end of the connecting rod away from the rotating frame is rotatably connected to the clamping plate. The lower pressure plate is provided with a driving component for driving the rotating frame to rotate.

[0010] By adopting the above technical solution, the driving component drives the rotating frame to rotate, the rotating frame drives the connecting rod to rotate, one end of the connecting rod drives the clamping plate to slide, and at the same time drives the clamping plates on both sides to slide in opposite directions, making the driving operation convenient.

[0011] Optionally, the driving component includes a worm gear and a worm, a rotating disk is provided on the rotating frame, the rotating disk is rotatably mounted on the lower pressure plate, the worm gear is coaxially connected to the rotating disk, the worm is rotatably mounted on the lower pressure plate, and the worm meshes with one side of the worm gear.

[0012] By adopting the above technical solution, rotating the worm gear drives the worm wheel to rotate, which in turn drives the rotating disk to rotate, which in turn drives the rotating frame to rotate, driving the clamping plates on both sides to slide. The spring is limited and clamped by the self-locking of the worm wheel and worm gear, making adjustment and operation convenient.

[0013] Optionally, a sliding groove is provided on the lower pressure plate, and a sliding strip is slidably installed on the lower pressure plate at the sliding groove. The sliding strip slides in a direction perpendicular to the clamping plate. The clamping plate is disposed on the sliding strip, and one end of the sliding strip is rotatably connected to the end of the connecting rod away from the rotating frame.

[0014] By adopting the above technical solution, when the rotating frame drives the connecting rod to rotate, the connecting rod pulls the sliding bar to slide, thereby driving the clamping plate to move. The movement of the sliding bar limits the linear movement of the clamping plate.

[0015] Optionally, the lower pressure plate is provided with a return spring at the slide groove, and one end of the return spring is connected to the end of the sliding bar away from the connecting rod.

[0016] By adopting the above technical solution, when the spring to be tested is clamped, the sliding bar slides, and at this time the return spring is stretched. When the clamping plate is released, the return spring pulls the sliding bar back to its original position, which facilitates the next test.

[0017] Optionally, a rotating screw is threaded onto the sliding bar, the rotating screw is distributed along the length of the sliding bar, the clamping plate is slidably mounted on the sliding bar, and the clamping plate is rotatably connected to one end of the rotating screw.

[0018] By adopting the above technical solution, the position of the clamping plate on the sliding bar can be adjusted by rotating the screw, thereby adjusting the relative position between the clamping plates on both sides, which facilitates further adjustment of the clamping position of the clamping plate.

[0019] Optionally, a drive cylinder is provided at the top of the frame, and a connecting plate is provided at one end of the piston rod of the drive cylinder. An adjusting screw is threadedly installed on the connecting plate. The adjusting screw is perpendicular to the upper pressure plate, and one end of the adjusting screw is rotatably connected to the upper pressure plate.

[0020] By adopting the above technical solution, the driving cylinder drives the upper pressure plate to slide, which facilitates the placement of the spring to be tested. The position of the upper pressure plate can be adjusted by rotating the adjusting screw, which is suitable for testing springs of different lengths.

[0021] Optionally, the drive mechanism includes a drive motor and a connecting plate. The drive motor is located at the bottom of the frame, and the connecting plate is located at the output shaft of the drive motor and is coaxial with the output shaft. A swing rod is provided on the connecting plate. One end of the swing rod is eccentrically rotatably connected to the connecting plate, and the end of the swing rod away from the connecting plate is rotatably connected to the lower pressure plate.

[0022] By adopting the above technical solution, the drive motor drives the connecting plate to rotate, which in turn drives the swing rod to swing and move. The swing rod pushes the lower pressure plate to slide back and forth toward the upper pressure plate, so as to perform fatigue testing on the spring to be tested.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. Place the spring between the upper and lower pressure plates. The rotating part drives the clamping plates on both sides to clamp the spring. The clamping plates on the upper and lower pressure plates clamp the two ends of the spring respectively. At this time, the driving mechanism drives the lower pressure plate to slide back and forth to perform fatigue testing. The clamping plates limit the clamping of the spring. The clamping effect is good for springs with different outer diameters and the testing operation is convenient.

[0025] 2. The spring is clamped and limited by a worm gear self-locking mechanism, making adjustment and operation convenient;

[0026] 3. Rotate the adjusting screw to adjust the position of the upper pressure plate, which is suitable for testing springs of different lengths. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of this application.

[0028] Figure 2 This is a cross-sectional structural diagram of the clamping assembly and driving component on the lower pressure plate of this application.

[0029] Figure 3 This is an enlarged cross-sectional structural diagram of part B of this application.

[0030] Figure 4 This is an enlarged cross-sectional structural diagram of part A of this application.

[0031] Those skilled in the art will understand that the elements in the accompanying drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the size and position of some elements in the drawings may be enlarged relative to other elements to aid in understanding the embodiments of the invention.

[0032] Reference numerals: 1. Frame; 11. Drive mechanism; 111. Drive motor; 112. Connecting plate; 113. Swing rod; 12. Drive cylinder; 13. Connecting plate; 14. Adjusting screw; 2. Upper pressure plate; 3. Lower pressure plate; 31. Groove; 32. Rotating disc; 33. Slide groove; 34. Sliding bar; 341. Rotating screw; 35. Return spring; 4. Rotating component; 41. Rotating frame; 411. Rotating shaft; 412. Rotating rod; 42. Connecting rod; 5. Clamping plate; 51. Anti-slip pad; 6. Drive component; 61. Worm gear; 62. Worm; 63. Rotating sleeve. Detailed Implementation

[0033] The present application will be further described in detail below with reference to the accompanying drawings.

[0034] This application discloses a fatigue testing machine for automotive springs, referring to... Figure 1 The machine includes a frame 1, on which an upper pressure plate 2 and a lower pressure plate 3 are slidably mounted along the vertical direction. The upper pressure plate 2 and the lower pressure plate 3 are both horizontally distributed. The upper pressure plate 2 is located above the lower pressure plate 3. Clamping components are provided on the lower side of the upper pressure plate 2 and the upper side of the lower pressure plate 3. The clamping components on the upper and lower sides are relatively distributed.

[0035] Reference Figure 1 and Figure 2The clamping assembly includes a rotating component 4 and a clamping plate 5. The clamping plate 5 is slidably mounted on the lower pressure plate 3. There are two clamping plates 5 arranged opposite each other. The clamping plates 5 on both sides form a clamping space for clamping the spring. There are two sets of clamping plates 5 arranged adjacent to each other. The rotating component 4 is set on the lower pressure plate 3. The rotating component 4 drives the clamping plates 5 on both sides to slide in opposite directions, placing the spring between the upper pressure plate 2 and the lower pressure plate 3. At this time, the rotating component 4 drives the clamping plates 5 on both sides to clamp the spring. The clamping plates 5 on the upper pressure plate 2 and the lower pressure plate 3 clamp the two ends of the spring respectively.

[0036] Reference Figure 1 and Figure 2 A drive mechanism 11 is installed on the frame 1. The drive mechanism 11 includes a drive motor 111 and a connecting plate 112. The drive motor 111 is located at the bottom of the frame 1, and the connecting plate 112 is located at the output shaft of the drive motor 111 and is coaxial with the output shaft. The connecting plate 112 is vertically arranged, and a swing rod 113 is installed on the connecting plate 112. One end of the swing rod 113 is eccentrically rotatably connected to the connecting plate 112, and the other end of the swing rod 113, away from the connecting plate 112, is rotatably connected to the lower pressure plate 3 facing downward. The drive motor 111 drives the connecting plate 112 to rotate, causing the swing rod 113 to swing and move. The swing rod 113 pushes the lower pressure plate 3 to slide back and forth towards the upper pressure plate 2 to perform fatigue testing on the spring under test.

[0037] Reference Figure 2 and Figure 3 The rotating component 4 includes a rotating frame 41 and a connecting rod 42. A groove 31 is formed on the upward-facing side of the lower pressure plate 3. The rotating frame 41 is positioned within the groove 31 of the lower pressure plate 3. The rotating frame 41 includes a rotating shaft 411 and a rotating rod 412. A rotating disk 32 is rotatably mounted on the lower pressure plate 3. The rotating shaft 411 is positioned above the rotating disk 32 and coaxially connected to it. The rotating rod 412 is positioned on the rotating shaft 411 and is perpendicular to it. Connecting rods 42 are rotatably connected to both ends of the rotating rod 412. One end of the connecting rod 42, away from the rotating frame 41, is rotatably connected to the clamping plate 5. The rotating frame 41 drives the connecting rod 42 to rotate, and one end of the connecting rod 42 drives the clamping plate 5 to slide, simultaneously driving the clamping plates 5 on both sides to slide in opposite directions.

[0038] Reference Figure 2 and Figure 3 A groove 33 is provided along the length of the lower pressure plate 3. A sliding strip 34 is slidably installed on the lower pressure plate 3 at the groove 33. The clamping plate 5 is vertically arranged on the upper side of the sliding strip 34. One end of the sliding strip 34 is rotatably connected to the end of the connecting rod 42 away from the rotating frame 41. When the rotating frame 41 drives the connecting rod 42 to rotate, the connecting rod 42 pulls the sliding strip 34 to slide, thereby driving the clamping plate 5 to move. The movement of the sliding strip 34 limits the linear movement of the clamping plate 5.

[0039] Reference Figure 4 A return spring 35 is installed on the lower pressure plate 3 at the slide groove 33. One end of the return spring 35 is connected to the end of the sliding bar 34 away from the connecting rod 42. When the spring to be tested is clamped, the sliding bar 34 slides, and the return spring 35 is stretched. When the clamping plate 5 is released, the return spring 35 pulls the sliding bar 34 back to its original position, which is convenient for the next test.

[0040] Reference Figure 4 The clamping plate 5 is arc-shaped, and an anti-slip pad 51 is provided on one side of the arc-shaped clamping plate 5. The anti-slip pad 51 is provided to reduce the probability of the clamping spring becoming loose.

[0041] Reference Figure 4 A rotating screw 341 is threaded onto the sliding bar 34, and the rotating screw 341 is distributed along the length of the sliding bar 34. The clamping plate 5 is slidably mounted on the sliding bar 34, and the clamping plate 5 slides along the length of the sliding bar 34. The clamping plate 5 is rotatably connected to one end of the rotating screw 341. Rotating the rotating screw 341 adjusts the position of the clamping plate 5 on the sliding bar 34, thereby adjusting the relative position between the clamping plates 5 on both sides, facilitating further adjustment of the clamping position of the clamping plate 5.

[0042] Reference Figure 3 Both the upper pressure plate 2 and the lower pressure plate 3 are equipped with driving components 6. The driving component 6 includes a worm wheel 61 and a worm 62. The worm wheel 61 is coaxially connected to the rotating disk 32 and is located on the lower side of the rotating disk 32. The worm 62 is rotatably mounted on the lower pressure plate 3. The worm 62 meshes with one side of the worm wheel 61. The worms 62 on adjacent sides are connected by a rotating sleeve 63. Rotating the worm 62 will drive the worm wheels 61 on both sides to rotate. The worm wheels 61 will drive the rotating disk 32 to rotate, which in turn will drive the rotating frame 41 to rotate, driving the clamping plates 5 on both sides to slide. The spring is limited and clamped by the self-locking of the worm wheel 61 and the worm 62.

[0043] Reference Figure 1 A drive cylinder 12 is mounted on the top of the frame 1, facing vertically downwards. A connecting plate 13 is attached to one end of the piston rod of the drive cylinder 12. An adjusting screw 14 is threaded onto the connecting plate 13, and the adjusting screw 14 is vertically positioned. The downward-facing end of the adjusting screw 14 is rotatably connected to one side of the upper pressure plate 2. The drive cylinder 12 drives the upper pressure plate 2 to slide, facilitating the placement of the spring to be tested. Rotating the adjusting screw 14 adjusts the position of the upper pressure plate 2, making it suitable for testing springs of different lengths.

[0044] The implementation principle of a fatigue testing machine for automotive springs according to an embodiment of this application is as follows: The spring is placed between the upper pressure plate 2 and the lower pressure plate 3. At this time, the worm gear 62 is rotated to drive the rotating frame 41 on both sides to rotate, thereby driving the sliding strips 34 on both sides to slide and drive the clamping plates 5 on both sides to slide and clamp the spring. The clamping plates 5 on the upper pressure plate 2 and the lower pressure plate 3 clamp the two ends of the spring respectively. At this time, the drive motor 111 drives the swing rod 113 to drive the lower pressure plate 3 to slide back and forth to perform fatigue testing. The clamping plates 5 limit the clamping of the spring, and the clamping effect is good for springs with different outer diameters.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fatigue testing machine for automotive springs, comprising a frame (1), wherein an upper pressure plate (2) and a lower pressure plate (3) are slidably mounted on the frame (1), the upper pressure plate (2) and the lower pressure plate (3) are distributed parallel to each other, and a clamping assembly is provided on the side of the lower pressure plate (3) facing the upper pressure plate (2), characterized in that: The clamping assembly includes a rotating component (4) and a clamping plate (5). The clamping plate (5) is slidably mounted on the lower pressure plate (3). There are two clamping plates (5) arranged opposite to each other. The clamping plates (5) on both sides form a clamping space for clamping the spring. The rotating component (4) is arranged on the lower pressure plate (3). The rotating component (4) is used to drive the clamping plates (5) on both sides to slide in opposite directions. The upper pressure plate (2) is provided with the same clamping assembly on the side facing the lower pressure plate (3). The clamping assemblies on both sides are distributed opposite to each other. The frame (1) is provided with a driving mechanism (11) for driving the lower pressure plate (3) to slide back and forth in the direction of or away from the upper pressure plate (2).

2. The fatigue testing machine for automotive springs according to claim 1, characterized in that: The rotating component (4) includes a rotating frame (41) and a connecting rod (42). The rotating frame (41) is rotatably mounted on the lower pressure plate (3). The rotation axis of the rotating frame (41) is perpendicular to the plane of the lower pressure plate (3). The connecting rod (42) is mounted on the rotating frame (41) and rotatably connected to the rotating frame (41). One end of the connecting rod (42) away from the rotating frame (41) is rotatably connected to the clamping plate (5). The lower pressure plate (3) is provided with a driving component (6) for driving the rotating frame (41) to rotate.

3. A fatigue testing machine for automotive springs according to claim 2, characterized in that: The driving component (6) includes a worm gear (61) and a worm (62). A rotating disk (32) is provided on the rotating frame (41). The rotating disk (32) is rotatably mounted on the lower pressure plate (3). The worm gear (61) is coaxially connected to the rotating disk (32). The worm (62) is rotatably mounted on the lower pressure plate (3). The worm (62) meshes with one side of the worm gear (61).

4. A fatigue testing machine for automotive springs according to claim 2, characterized in that: The lower pressure plate (3) is provided with a sliding groove (33). A sliding strip (34) is slidably installed on the lower pressure plate (3) at the sliding groove (33). The sliding strip (34) slides in a direction perpendicular to the clamping plate (5). The clamping plate (5) is set on the sliding strip (34). One end of the sliding strip (34) is rotatably connected to the end of the connecting rod (42) away from the rotating frame (41).

5. A fatigue testing machine for automotive springs according to claim 4, characterized in that: The lower pressure plate (3) is provided with a return spring (35) at the slide groove (33), and one end of the return spring (35) is connected to the end of the sliding bar (34) away from the connecting rod (42).

6. A fatigue testing machine for automotive springs according to claim 4, characterized in that: A rotating screw (341) is threaded onto the sliding bar (34). The rotating screw (341) is distributed along the length of the sliding bar (34). The clamping plate (5) is slidably mounted on the sliding bar (34). The clamping plate (5) is rotatably connected to one end of the rotating screw (341).

7. A fatigue testing machine for automotive springs according to claim 1, characterized in that: A drive cylinder (12) is provided at the top of the frame (1). A connecting plate (13) is provided at one end of the piston rod of the drive cylinder (12). An adjusting screw (14) is threaded on the connecting plate (13). The adjusting screw (14) is perpendicular to the upper pressure plate (2). One end of the adjusting screw (14) is rotatably connected to the upper pressure plate (2).

8. A fatigue testing machine for automotive springs according to claim 1, characterized in that: The drive mechanism (11) includes a drive motor (111) and a connecting plate (112). The drive motor (111) is located at the bottom of the frame (1). The connecting plate (112) is located at the output shaft of the drive motor (111) and is coaxial with the output shaft. A swing rod (113) is provided on the connecting plate (112). One end of the swing rod (113) is eccentrically rotatably connected to the connecting plate (112). The end of the swing rod (113) away from the connecting plate (112) is rotatably connected to the lower pressure plate (3).

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