Reciprocating motion mechanism for spring testing machine and spring testing machine

Abstract

The utility model provides a spring testing machine and a reciprocating motion mechanism for the spring testing machine, including the frame, the frame is provided with a pressure head device, a drive device, a bearing table and a guide pillar, the drive device drives the pressure head device to reciprocate along the height direction of the guide pillar, the bearing table is arranged below the pressure head device, and the guide pillar is arranged on the bearing table. A to-be-tested spring is mounted between the pressure head device and the bearing table; the pressure head device comprises a pressure seat and a hinge table, the hinge table is respectively hinged with the pressure seat and the output end of the driving device, and the lower end of the pressure seat is connected with the upper end of the spring to be tested. The pressing rod and the pressing seat are hinged through the hinge table, so that the impact load on the driving device is reduced, the service life of the testing machine is prolonged, and the hinge connection structure adopts the rolling bearing group and is matched with lubrication, so that the service life of the testing machine can be further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of spring testing equipment, in particular to a reciprocating motion mechanism for a spring testing machine and the spring testing machine. Background Art

[0002] The main function of the spring testing machine is to perform compression fatigue life test on the spring. The testing machine is a rapid life test machine that simulates the actual working state of the spring. It can perform life test on the spring at the set compression stroke test frequency.

[0003] The existing Chinese patent application document with announcement number CN217654713U discloses a spring fatigue life test bench, including a platform, a bracket is fixedly connected to the upper part of the platform, a cylinder is fixedly connected to the upper part of the bracket, a movable rod is fixedly connected to the lower movable end of the cylinder, a limiting groove is provided on the inner wall of the bracket, a cavity is provided inside the platform, a threaded rod and a square sleeve are provided inside the cavity, a spring is provided on the upper outer periphery of the square sleeve, a motor is fixedly connected to the inside of the platform, a driving gear is fixedly connected to the left driving end of the motor, a control board is fixedly connected to the upper part of the platform, and the control board is electrically connected to the cylinder and the motor.

[0004] In the prior art, the cylinder is started to drive the pressure plate to repeatedly press the spring to perform a spring fatigue life test. One end of the pressure plate extends into the limit groove, the pressure plate is easily damaged, and it is difficult to replace, which needs to be improved. Utility Model Content

[0005] In view of the defects in the prior art, the purpose of the utility model is to provide a reciprocating motion mechanism for a spring testing machine and a spring testing machine.

[0006] According to the utility model, a reciprocating motion mechanism for a spring testing machine includes a frame, on which a pressure head device, a driving device, a supporting platform and a guide column are arranged, and the driving device drives the pressure head device to reciprocate along the height direction of the guide column, and the supporting platform is arranged below the pressure head device, and the spring to be tested is installed between the pressure head device and the supporting platform; the pressure head device includes a pressure seat and a hinged platform, and the hinged platform is respectively hinged to the pressure seat and the output end of the driving device, and the lower end of the pressure seat is connected to the upper end of the spring to be tested.

[0007] Preferably, a sliding block is installed on the side wall of the pressure seat close to the guide column through a fastener, a sliding rail is provided on the guide column, and the sliding block is slidably matched with the sliding rail.

[0008] Preferably, the upper part of the articulated platform is hinged to the output end of the driving device, the lower part of the articulated platform is hinged to the pressure seat, and the articulation axis of the articulated platform and the output shaft of the driving device is parallel to the articulation axis of the articulated platform and the pressure seat.

[0009] Preferably, the frame is further provided with a lifting device, and the lifting device drives the supporting platform to reciprocate along the height direction.

[0010] Preferably, a load sensor for detecting changes in spring force is provided on the support platform.

[0011] Preferably, the pressure head device, the supporting platform and the guide column are arranged in two groups on the frame at intervals; the driving device includes a pressure rod, the middle part of the pressure rod length is rotatably mounted on the frame, and the two pressure head devices are respectively arranged on both sides of the pressure rod length and are respectively connected to the pressure rod; the driving device also includes a driving component that drives the pressure rod to swing back and forth around the central axis of the middle connection point.

[0012] Preferably, the connection points between the two pressing head devices and the pressing rod are at the same distance from the mounting point in the middle of the length of the pressing rod.

[0013] Preferably, the rack is a frame structure.

[0014] Preferably, a security net is provided around the frame.

[0015] A spring testing machine provided by the utility model adopts a reciprocating motion mechanism.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The utility model reduces the impact load on the driving device by hingedly connecting the pressure rod and the pressure seat through the hinged platform, which helps to improve the service life of the testing machine. The hinged connection structure adopts a rolling bearing group and cooperates with lubrication, which can further improve the service life of the testing machine.

[0018] 2. The utility model provides a load sensor for detecting changes in spring force on the supporting platform, so as to detect changes in spring force, thereby enabling an alarm to be sounded after the spring breaks. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0020] Figure 1 This is a front schematic diagram mainly showing the overall structure of the spring testing machine of the utility model;

[0021] Figure 2It is a side schematic diagram mainly showing the overall structure of the spring testing machine of the utility model.

[0022] Reference numerals:

[0023] Frame 1 Motor 34

[0024] Pressure head device 2 Transmission plate 35

[0025] Press seat 21 Transmission shaft 36

[0026] Articulated table 22 Support table 4

[0027] Slider 23 Guide column 5

[0028] Drive device 3 Slide rail 51

[0029] Pressure rod 31 Lifting device 6

[0030] Connecting rod 32 Manual device 7

[0031] Turntable 33 DETAILED DESCRIPTION

[0032] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the utility model. These all belong to the protection scope of the utility model.

[0033] like Figure 1 As shown, a reciprocating motion mechanism for a spring testing machine provided according to the utility model includes a frame 1, on which a pressing head device 2, a driving device 3, a supporting platform 4 and a guide column 5 are arranged, the supporting platform 4 is arranged below the pressing head device 2, and the spring to be tested is installed between the pressing head device 2 and the supporting platform 4, and the driving device 3 drives the pressing head device 2 to reciprocate along the height direction of the guide column 5.

[0034] The driving device 3 includes a pressure rod 31, a connecting rod 32, a rotating disk 33 and a driving source. The middle of the length of the pressure rod 31 is rotatably mounted on the upper part of the frame 1, and the pressure head device 2 is mounted on one side of the length of the pressure rod 31. One end of the connecting rod 32 is hinged to any end of the pressure rod 31, and the other end of the connecting rod 32 is hinged to the rotating disk 33. At least one eccentric hinge point is provided on the rotating disk 33, and the driving source drives the rotating disk 33 to rotate. The pressure head device 2 includes a pressure seat 21 and a hinged platform 22. The hinged platform 22 is hinged to the pressure seat 21 and the output end of the driving device 3 respectively, and the lower end of the pressure seat 21 is connected to the upper end of the spring to be tested.

[0035] In the present application, a driving source is used to drive the turntable 33 to rotate, and the connecting rod 32 eccentrically connected to the turntable 33 drives the pressure rod 31 to perform reciprocating swinging motion with a certain amplitude, thereby driving the pressure head device 2 to perform reciprocating motion along the height direction of the guide column 5 to compress or stretch the spring, thereby realizing the detection of the spring life.

[0036] Specifically, a slider 23 is installed on the side wall of the pressure seat 21 close to the guide column 5 through fasteners, and a slide rail 51 is provided on the guide column 5, and the slider 23 slides with the slide rail 51. Since the slider 23 is a vulnerable moving part, the technical solution of the present application sets the slide rail 51 as an open structure, and the pressure seat 21 is connected to the slider 23 through fasteners, which is convenient for the staff to disassemble, replace and install the slider 23 later.

[0037] Furthermore, the upper part of the articulated platform 22 is articulated with the output end of the driving device 3, the lower part of the articulated platform 22 is articulated with the pressure seat 21, and the articulated axis of the output shaft of the articulated platform 22 and the driving device 3 is parallel to the articulated axis of the articulated platform 22 and the pressure seat 21. The impact load on the driving device 3 is reduced by the articulated connection, which helps to improve the service life of the testing machine. It should be noted that the articulated connection structure of the present application adopts a rolling bearing group and cooperates with lubrication, which can further improve the service life of the testing machine.

[0038] More specifically, the frame 1 is also provided with a lifting device 6, which drives the support platform 4 to reciprocate in the height direction. The lifting device 6 can be an oil cylinder or an electric cylinder, and with the help of the lifting device 6, the testing machine can adapt to springs to be tested of different sizes. It should be noted that the lifting device 6 can be arranged directly below the installation position of the spring to be tested, or after the lifting device 6 completes the lifting, a support column can be added to support the support platform 4 as a whole to improve stability. A load sensor for detecting changes in the force on the spring is provided on the support platform 4, which is used to detect changes in the force on the spring, so that an alarm can be sounded after the spring breaks.

[0039] Specifically, the connecting rod 32, the rotating disk 33 and the driving source constitute a driving assembly that drives the pressure rod 31 to swing back and forth around the central axis of the middle connection point. The rotating disk 33 is provided with a plurality of eccentric hinge holes and a hinge hole located in the center, and the connecting rod 32 is detachably connected to the hinge hole through a pin. The driving source includes a motor 34, a transmission disk 35 and a transmission shaft 36. The output end of the motor 34 is connected to the transmission disk 35 through a belt, and the transmission disk 35 is connected to the rotating disk 33 coaxially through the transmission shaft 36.

[0040] Both the turntable 33 and the transmission disc 35 are in an upright state, and both are rotatably mounted on the frame 1 through bearings. The motor 34 drives the transmission disc 35 to rotate through a belt, and a reducer can also be set at the output end of the motor 34. The transmission disc 35 drives the turntable 33 to rotate through a coaxially mounted transmission shaft 36, and the turntable 33 drives the connecting rod 32 hinged on its eccentric hinge hole to move, thereby driving one end of the pressure rod 31 to swing back and forth with a certain amplitude. It should be noted that the swing amplitude of the pressure rod 31 can be adjusted by adjusting the distance between the hinge point of the connecting rod 32 and the turntable 33 and the center point of the turntable 33.

[0041] The frame 1 is also provided with a manual device 7, which includes a mounting seat, a rotating rod and a bevel gear set, the rotating rod is rotatably mounted on the mounting seat, and the rotating rod is connected to the transmission shaft 36 through the bevel gear set. During installation, the manual device 7 can be used to manually drive the turntable 33 to rotate and detect the amplitude of the reciprocating swing of the pressure rod 31.

[0042] In a preferred specific embodiment of the present application, a pressure head device 2 is respectively provided on both sides of the length of the pressure rod 31. The pressure head device 2, the support platform 4 and the guide column 5 are arranged in two groups on the frame 1 at intervals, and the two pressure head devices 2 are respectively arranged on both sides of the length of the pressure rod 31 and are respectively connected to the pressure rod 31, and the connection points of the two pressure head devices 2 with the pressure rod 31 are at the same distance from the installation point in the middle of the length of the pressure rod 31. Thereby, the spring testing machine can detect two springs at the same time. It should be further explained that the distance between the connection points of the two pressure head devices 2 with the pressure rod 31 and the installation point in the middle of the length of the pressure rod 31 of the present application can be different, and can be designed according to actual test requirements. It should be further explained that the number of pressure head devices 2 can be arranged in multiple intervals along the length direction of the pressure rod 31.

[0043] The rack 1 of the present application is a frame structure, and a security net is arranged around the rack 1 to ensure the safety of the staff.

[0044] According to the utility model, a spring testing machine is provided, which adopts a power system for a spring testing machine and a reciprocating motion mechanism for a spring testing machine.

[0045] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims

1. A reciprocating motion mechanism for a spring testing machine, characterized in that: The invention comprises a frame (1), wherein a pressing head device (2), a driving device (3), a supporting platform (4) and a guide column (5) are arranged on the frame (1), wherein the driving device (3) drives the pressing head device (2) to reciprocate along the height direction of the guide column (5), the supporting platform (4) is arranged below the pressing head device (2), and the spring to be tested is installed between the pressing head device (2) and the supporting platform (4); The pressure head device (2) comprises a pressure seat (21) and a hinged platform (22), wherein the hinged platform (22) is hingedly connected to the pressure seat (21) and the output end of the driving device (3) respectively, and the lower end of the pressure seat (21) is connected to the upper end of the spring to be tested.

2. The reciprocating motion mechanism for a spring testing machine according to claim 1, characterized in that: A sliding block (23) is installed on the side wall of the pressure seat (21) close to the guide column (5) through a fastener, and a sliding rail (51) is arranged on the guide column (5), and the sliding block (23) is slidably matched with the sliding rail (51).

3. The reciprocating motion mechanism for a spring testing machine according to claim 1, characterized in that: The upper part of the hinged platform (22) is hinged to the output end of the driving device (3), the lower part of the hinged platform (22) is hinged to the pressure seat (21), and the hinge axis of the hinged platform (22) and the output shaft of the driving device (3) is parallel to the hinge axis of the hinged platform (22) and the pressure seat (21).

4. The reciprocating motion mechanism for a spring testing machine according to claim 1, characterized in that: The frame (1) is also provided with a lifting device (6), and the lifting device (6) drives the supporting platform (4) to reciprocate in the height direction.

5. The reciprocating motion mechanism for a spring testing machine according to claim 1, characterized in that: The support platform (4) is provided with a load sensor for detecting changes in the force applied to the spring.

6. The reciprocating motion mechanism for a spring testing machine according to claim 1, characterized in that: The pressure head device (2), the supporting platform (4) and the guide column (5) are arranged in two groups at intervals on the frame (1); The driving device (3) comprises a pressure rod (31), the middle portion of the pressure rod (31) is rotatably mounted on the frame (1), and the two pressure head devices (2) are respectively arranged on both sides of the length of the pressure rod (31) and are respectively connected to the pressure rod (31); The driving device (3) also comprises a driving assembly for driving the pressure rod (31) to swing back and forth around the central axis of the middle connection point.

7. The reciprocating motion mechanism for a spring testing machine according to claim 6, characterized in that: The connection points of the two pressing head devices (2) and the pressing rod (31) are at the same distance from the installation point in the middle of the length of the pressing rod (31).

8. The reciprocating motion mechanism for a spring testing machine according to claim 1, characterized in that: The frame (1) is in the form of a frame structure.

9. The reciprocating motion mechanism for a spring testing machine according to claim 1, characterized in that: A security net is arranged on the peripheral side of the frame (1).

10. A spring testing machine, characterized in that: A reciprocating motion mechanism for a spring testing machine as claimed in any one of claims 1 to 9 is adopted.

Images