Power system for spring testing machine and spring testing machine

Abstract

The utility model provides a power system for a spring testing machine and the spring testing machine, the power system comprises a pressure head device, a driving device and a bearing table which are arranged on a rack, and a spring to be tested is arranged between the pressure head device and the bearing table; the driving device comprises a pressing rod, a connecting rod, a rotating disc and a driving source, the middle of the pressing rod is rotationally installed on the rack, and the pressing head device is installed on one side of the pressing rod in the length direction; one end of the connecting rod is hinged to any end of the pressing rod, the other end of the connecting rod is hinged to the rotating disc, at least one eccentric hinge point is arranged on the rotating disc, and the driving source drives the rotating disc to rotate. A motor drives a transmission disc to rotate, the transmission disc drives a rotary disc to rotate through a coaxially-installed transmission shaft, the rotary disc drives a connecting rod hinged to an eccentric hinge hole of the rotary disc to move, and therefore the length end of a pressing rod is driven to swing back and forth at a certain amplitude; the swing amplitude of the pressing rod can be adjusted by adjusting the distance between the hinge point of the connecting rod and the turntable and the central point of the turntable, and the service life of the spring is tested.

Description

Technical Field

[0001] The utility model relates to the technical field of spring testing equipment, in particular to a power system for a spring testing machine and a 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 CN214702709U discloses a spring fatigue life test bench, which includes a base, an upper surface of the base is fixedly connected to an L-shaped support frame, a lower surface of the horizontal part of the L-shaped support frame is fixedly connected to a telescopic cylinder, a pressing plate is fixedly connected to the bottom of the telescopic cylinder, a pressing mechanism is arranged at the bottom of the pressing plate, and the pressing mechanism is used to press the spring, two symmetrically distributed support plates are fixedly connected to the upper surface of the base, and the tops of the two support plates are jointly fixedly connected to a test bench, three adjustment plates are arranged on the top of the test bench, and an adjustment mechanism corresponding to the adjustment plate is arranged at the bottom of the test bench, and the adjustment mechanism is used to adjust the distance between the adjustment plate and the extrusion plate in the pressing mechanism, thereby changing the node of the spring test.

[0004] The prior art utilizes the reciprocating motion of a telescopic cylinder to press or stretch the spring to be tested. The present application provides another power system to achieve the pressing or stretching of the spring to be tested. Utility Model Content

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

[0006] According to the utility model, a power system for a spring testing machine includes a frame, on which a pressure head device, a driving device and a supporting platform are arranged, 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 driving device includes a pressure rod, a connecting rod, a turntable and a driving source, the middle part of the pressure rod length is rotatably mounted on the frame, and the pressure head device is installed on one side of the pressure rod length; one end of the connecting rod is hinged to either end of the pressure rod, and the other end of the connecting rod is hinged to the turntable, at least one eccentric hinge point is arranged on the turntable, and the driving source drives the turntable to rotate.

[0007] Preferably, the turntable is provided with a plurality of eccentric hinge holes and a central hinge hole, and the connecting rod is detachably connected to the hinge hole via a pin.

[0008] Preferably, the driving source comprises a motor, a transmission disc and a transmission shaft, the output end of the motor is transmission-connected to the transmission disc via a belt, and the transmission disc is coaxially transmission-connected to the rotating disc via the transmission shaft.

[0009] Preferably, a manual device is also provided on the frame, and the manual device includes a mounting seat, a rotating rod and a worm gear set. The rotating rod is rotatably mounted on the mounting seat, and the rotating rod is transmission-connected to the transmission shaft via the worm gear set.

[0010] Preferably, the pressure head device is provided with one on each side of the pressure rod length.

[0011] 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.

[0012] Preferably, a load sensor for detecting changes in spring force is provided on the support platform.

[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 power system for a spring testing machine.

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

[0017] 1. The utility model drives the transmission disk to rotate through a motor, and the transmission disk drives the turntable to rotate through a coaxially installed transmission shaft. The turntable drives the connecting rod hinged on its eccentric hinge hole to move, thereby driving one end of the pressure rod to swing back and forth with a certain amplitude, and the distance between the hinge point of the connecting rod and the turntable and the center point of the turntable can be adjusted to adjust the swing amplitude of the pressure rod, thereby realizing the test of the spring life.

[0018] 2. The utility model provides a pressure head device on both sides of the pressure rod length, and the connection points of the two pressure head devices and the pressure rod are at the same distance from the installation point in the middle of the pressure rod length, so that two springs can be tested at the same time. 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 and Figure 2 As shown, a power system 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 worm 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 worm 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 power system for a spring testing machine, characterized in that: The machine comprises a frame (1), on which a pressing head device (2), a driving device (3) and a supporting platform (4) are arranged, wherein the supporting platform (4) is arranged below the pressing head device (2), and a spring to be tested is installed between the pressing head device (2) and the supporting platform (4); The driving device (3) comprises 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 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.

2. The power system for a spring testing machine according to claim 1, characterized in that: The rotating disk (33) is provided with a plurality of eccentric hinge holes and a hinge hole located at the center, and the connecting rod (32) is detachably connected to the hinge hole via a pin shaft.

3. The power system for a spring testing machine according to claim 1, characterized in that: The driving source comprises a motor (34), a transmission disc (35) and a transmission shaft (36); the output end of the motor (34) is transmission-connected to the transmission disc (35) via a belt; the transmission disc (35) is coaxially transmission-connected to the rotating disc (33) via the transmission shaft (36).

4. The power system for a spring testing machine according to claim 3, characterized in that: The frame (1) is also provided with a manual device (7), the manual device (7) comprising a mounting seat, a rotating rod and a worm gear set, the rotating rod being rotatably mounted on the mounting seat, and the rotating rod being transmission-connected to a transmission shaft (36) via the worm gear set.

5. The power system for a spring testing machine according to claim 1, characterized in that: The pressure head device (2) is respectively provided with one on both sides of the length of the pressure rod (31).

6. The power system for a spring testing machine according to claim 5, 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).

7. The power system 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.

8. The power system 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 power system 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 power system for a spring testing machine according to any one of claims 1 to 9 is used.

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