A single-station spring testing machine

Abstract

The utility model discloses a single-station spring testing machine, which belongs to the field of spring testing technology. It includes a base and a frame arranged above the base, a test piece is slidably connected in the frame, a pressure test module is arranged between the test piece and the base, a tension test module is arranged between the test piece and the top of the frame, a motor is arranged on the frame, a screw rod 1 and a screw rod 2 are rotatably connected in the frame, and the screw rod 1, the screw rod 2 and the motor are connected through a transmission structure. Through the utility model, when the double screw rods rotate, the movement of the movable plate at the double screw rods is ensured to be synchronized with the movement of the movable plate at the optical axis, thereby ensuring the displacement consistency of the optical axis end of the movable plate and the screw rod end, thereby making the test accuracy high and the error small when the spring testing machine is used to test the spring.

Description

Technical Field

[0001] The utility model relates to a single-station spring testing machine, belonging to the technical field of spring testing. Background Art

[0002] In the production process of springs, after the springs are produced, the staff must conduct strict tests on the springs before using them in production and life. Therefore, the performance of the springs will directly affect the reliability and safety of the equipment. The spring testing machine is an instrument used to test the performance of springs, mainly used to measure the elastic properties, fatigue life and deformation capacity of the springs.

[0003] However, in the prior art, the spring testing machine includes a test module, a display module and a transmission structure. Among them, the test module includes a movable plate that slides up and down to drive the sensor to move, and the transmission structure includes a motor, a screw and an optical axis. The movable plate is arranged on the single-screw rod and the optical axis. When the single-screw rod rotates, there is inevitably a gap between the movable plate and the optical axis, so the movement of the movable plate at the single-screw rod cannot ensure that the movable plate at the optical axis moves synchronously, and thus the displacement consistency of the optical axis end and the screw end of the movable plate cannot be ensured, which results in low test accuracy and large errors when the spring is tested using the spring testing machine. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a single-station spring testing machine, which solves the problem in the prior art that the single-screw transmission cannot ensure transmission synchronization, thereby failing to ensure the displacement consistency between the movable plate optical axis end and the screw end, thereby resulting in low test accuracy and large errors when using the spring testing machine to test the spring.

[0005] The technical problem to be solved by the utility model is achieved by adopting the following technical scheme: a single-station spring testing machine, including a base and a dustproof shell, a frame is fixed on the base and the frame is located in the dustproof shell, the frame includes a top plate and a bottom plate, a plurality of optical axes are fixed between the top plate and the bottom plate, and test pieces are axially slidably connected to the plurality of optical axes, wherein a motor is bolted to the bottom of the top plate, a screw rod 1 and a screw rod 2 with consistent specifications are rotatably connected between the top plate and the bottom plate, the screw rod 1, the screw rod 2 and the output shaft of the motor all extend out of the top of the top plate and are connected through a transmission structure, the transmission structure includes three synchronous wheels respectively fixed on the screw rod 1, the screw rod 2 and the output shaft of the motor, a synchronous belt is sleeved between the outer sides of the three synchronous wheels, the test piece includes a movable plate threadedly connected to the screw rod 1 and the screw rod 2, and a tension and pressure sensor is arranged on the movable plate.

[0006] By adopting the above technical scheme, when using a single-station spring testing machine to test a spring, the staff first places the spring to be tested in the pressure test module or the tension test module according to the test requirements of the spring. When the test instruction is transmitted to the motor, the staff first rotates the motor counterclockwise or clockwise according to the test instruction, and at the same time, the synchronous wheel arranged on the motor starts to rotate, and at the same time, the synchronous belt starts to rotate. The rotation of the synchronous belt causes the synchronous wheel arranged on the screw rod 1 and the screw rod 2 to start rotating, thereby causing the screw rod 1 and the screw rod 2 to start rotating. Due to the setting of the optical axis, the screw rod 1 and the screw rod 2, the movable plate cannot rotate, so that the movable plate can only move along the length direction of the screw rod 1 and the screw rod 2, and at the same time, the pull pressure sensor starts to move up or down, thereby realizing the test of the spring.

[0007] The utility model is further configured as follows: the pressure test module includes a pressure plate 1 arranged at the bottom of the tension pressure sensor, a pressure plate 2 used in conjunction with the pressure plate 1 is arranged on the base, the tension test module includes an upper fixture plate arranged at the top of the frame and at a position relative to the tension pressure sensor, a connecting rod is arranged on the side opposite to the upper fixture plate and the tension pressure sensor, and a test hook is arranged on the connecting rod.

[0008] By adopting the above technical solution, when the spring needs to be tested for tension, the staff first fixes the two ends of the spring to be tested on the test hooks respectively, and the staff tests the spring by moving the pulling pressure sensor up and down.

[0009] When the spring needs to be tested for pressure, the staff first fixes the two ends of the spring to be tested on pressure plate 1 and pressure plate 2 respectively, and then the staff moves pressure plate 1 up and down by pulling the pressure sensor to test the spring.

[0010] The utility model is further configured as follows: the test hook is detachably connected to the connecting rod, a round hole is provided at the end of the connecting rod for the end of the test hook to be inserted into, a connecting piece is provided on the connecting rod for limiting the test hook from being separated from the round hole, the connecting piece includes a hinge seat provided on the outer wall of the connecting rod, a pressure rod is rotatably connected to the hinge seat, an elastic piece is fixed between the pressure rod and the connecting rod, a first card slot is provided on the outer wall of the connecting rod, a second card slot is provided on the test hook, and a protrusion for inserting into the first card slot and the second card slot is provided on the pressure rod, wherein the elastic piece is provided at one end of the pressure rod away from the protrusion, and in the present embodiment, the elastic piece is a compression spring.

[0011] By adopting the above technical solution, when the test hook needs to be disassembled due to bending and damage, the staff only needs to press the end of the pressure rod away from the protrusion to make the pressure rod rotate and drive the protrusion to disengage from slot one and slot two. Since the protrusion releases the limit on the test hook, the test hook can easily disengage from the connecting rod. This operation is simple and convenient, and the test hook can be disassembled quickly.

[0012] The utility model is further configured as follows: a fixing block is also arranged on the frame, and a roller for tensioning the synchronous belt is rotatably connected to the fixing block.

[0013] By adopting the above technical solution, when the synchronous belt cannot complete the synchronization of the synchronous wheel well due to looseness, a roller can be installed on the fixed block, and the synchronous belt can be tensioned by the roller so that the synchronous belt can fit tightly with the synchronous wheel to better complete the synchronization effect of the synchronous belt on the synchronous wheel.

[0014] The utility model is further configured as follows: ribs are provided between both sides of the upper fixture plate and the base, two accordion-pleated dust strips are provided between the two ribs, one dust strip is provided between the upper fixture plate and the tension and pressure sensor, and the other dust strip is provided between the tension and pressure sensor and the base.

[0015] By adopting the above technical solution and arranging the dustproof strip, it is possible to prevent external dust from entering the interior of the housing when dust is raised in the working environment, thereby ensuring the stable operation of the single-station spring testing machine.

[0016] The beneficial effect of the utility model is that when the double screws rotate, the movement of the movable plate at the double screws is ensured to be synchronized with the movement of the movable plate at the optical axis, thereby ensuring the displacement consistency of the optical axis end and the screw end of the movable plate, thereby making the test accuracy high and the error small when the spring is tested using a spring testing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the frame, base, transmission structure, tension test module, pressure test module and test piece in the utility model;

[0019] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 4 It is a schematic diagram of the structure of the test hook, connecting rod and connecting parts.

[0021] In the figure: 1. dust cover; 2. computer; 3. base; 4. pressure plate 2; 5. dust strip; 6. tension pressure sensor; 7. pressure plate 1; 8. connecting rod; 9. test hook; 10. upper fixture plate; 11. retaining edge; 12. support frame; 13. bottom plate; 14. top plate; 15. movable plate; 16. screw rod 1; 17. motor; 18. optical axis; 19. encoder; 20. fixed block; 21. roller; 22. synchronous belt; 23. synchronous wheel; 24. screw rod 2; 25. pressure rod; 26. hinge seat; 27. bump; 28. compression spring; 29. ​​slot 1; 30. slot 2; 31. tension test module; 32. pressure test module; 33. round hole. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below in conjunction with specific illustrations.

[0023] like Figures 1 to 3 As shown, a single-station spring testing machine includes a base 3 and a dustproof shell 1, a frame is fixed on the base 3 and the frame is located in the dustproof shell 1, the frame includes a top plate 14 and a bottom plate 13, a plurality of optical axes 18 are fixed between the top plate 14 and the bottom plate 13, a test piece is axially slidably connected to the plurality of optical axes 18, a pressure test module 32 is arranged between the test piece and the base 3, a tension test module 31 is arranged between the test piece and the top plate 14, and a computer 2 for controlling spring testing and data feedback is arranged on the dustproof shell 1.

[0024] Among them, the motor 17 is bolted to the bottom of the top plate 14, and a screw rod 16 and a screw rod 24 of the same specifications are rotatably connected between the top plate 14 and the bottom plate 13. The output shafts of the screw rod 16, the screw rod 24 and the motor 17 all extend out of the top of the top plate 14 and are connected through a transmission structure. The transmission structure includes three synchronous wheels 23 respectively fixed on the output shafts of the screw rod 16, the screw rod 24 and the motor 17, and a synchronous belt 22 is sleeved between the outer sides of the three synchronous wheels 23. The test piece includes a movable plate 15 threadedly connected to the screw rod 16 and the screw rod 24, and a tension and pressure sensor 6 is arranged on the movable plate 15. Among them, a support frame 12 is also arranged on the top of the screw rod 16, and an encoder 19 for recording the rotation data of the screw rod 16 is arranged on the top of the support frame 12. The encoder 19, the motor 17, and the tension and pressure sensor 6 are all electrically connected to the computer 2.

[0025] When using a single-station spring testing machine to test a spring, the staff first places the spring to be tested in the pressure test module 32 or the tension test module 31 according to the test requirements of the spring. When the test instruction is transmitted to the motor 17, the staff first rotates the motor 17 counterclockwise or clockwise according to the test instruction, and at the same time, the synchronous wheel 23 arranged on the motor 17 starts to rotate, and the synchronous belt 22 starts to rotate. The rotation of the synchronous belt 22 causes the synchronous wheel 23 arranged on the screw rod 1 16 and the screw rod 2 24 to start to rotate, thereby causing the screw rod 1 16 and the screw rod 2 24 to start to rotate. Due to the setting of the optical axis 18, the screw rod 1 16 and the screw rod 2 24, the movable plate 15 cannot rotate, so that the movable plate 15 can only move along the length direction of the screw rod 1 16 and the screw rod 2 24, and at the same time, the pull pressure sensor 6 starts to move up or down, and the spring can be tested.

[0026] Among them, the arrangement of screw rod 16 and screw rod 24 makes it unnecessary for the optical axis 18 to limit the rotation of the movable plate 15, and the movable plate 15 can move axially under the drive of screw rod 16 and screw rod 24, and the arrangement of the synchronous belt 22 makes it possible for screw rod 16 and screw rod 24 of the same specifications to rotate at the same time, thereby ensuring the displacement consistency of the movable plate 15 at the optical axis end and the screw rod end, thereby improving the test accuracy and reducing the test error when using a spring testing machine to test the spring.

[0027] like Figure 2 As shown, the pressure test module 32 includes a pressure plate 7 arranged at the bottom of the tension pressure sensor 6, and a pressure plate 2 4 used in conjunction with the pressure plate 7 is arranged on the base 3. The tension test module 31 includes an upper fixture plate 10 arranged on the top of the frame and at a position relative to the tension pressure sensor 6, and a connecting rod 8 is arranged on the side opposite to the tension pressure sensor 6, and a test hook 9 is arranged on the connecting rod 8.

[0028] When the spring needs to be tested for tension, the staff first fixes the two ends of the spring to be tested on the test hook 9 respectively, and then tests the spring by pulling the pressure sensor 6 up and down.

[0029] When the spring needs to be tested for pressure, the staff first fixes the two ends of the spring to be tested on the pressure plate 1 7 and the pressure plate 2 4 respectively, and then the staff moves the pressure plate 1 7 up and down by pulling the pressure sensor 6 to test the spring.

[0030] like Figure 4As shown, the test hook 9 is detachably connected to the connecting rod 8, and a circular hole 33 for the end of the test hook 9 to be inserted is provided at the end of the connecting rod 8. A connecting member for limiting the test hook 9 from being separated from the circular hole 33 is provided on the connecting rod 8. The connecting member includes a hinge seat 26 arranged on the outer wall of the connecting rod 8, and a pressure rod 25 is rotatably connected to the hinge seat 26. An elastic member is fixed between the pressure rod 25 and the connecting rod 8. A slot 1 29 is provided on the outer wall of the connecting rod 8, and a slot 2 30 is provided on the test hook 9. A protrusion 27 for inserting into the slot 1 29 and the slot 2 30 is provided on the pressure rod 25, wherein the elastic member is arranged at the end of the pressure rod 25 away from the protrusion 27, and in the present embodiment, the elastic member is a compression spring 28.

[0031] When the test hook 9 needs to be disassembled due to bending and damage, the staff only needs to press the end of the pressure rod 25 away from the protrusion 27 to make the pressure rod 25 rotate and drive the protrusion 27 to disengage from the slot 1 29 and the slot 2 30. Since the protrusion 27 releases the limit on the test hook 9, the test hook 9 can easily disengage from the connecting rod 8. This operation is simple and convenient, and the test hook 9 can be quickly disassembled.

[0032] When the test hook 9 needs to be installed, the staff first presses the end of the pressure rod 25 away from the protrusion 27, so that the compression spring 28 is compressed and generates elastic force, thereby causing the protrusion 27 to disengage from the slot 1 29, and then only one end of the test hook 9 needs to be placed in the circular hole 33, and the depth of the circular hole 33 is used to limit the position of the test hook 9 so that the slot 1 29 is aligned with the slot 2 30. Then the staff cancels the force applied to the pressure rod 25, and at the same time the elastic member generates elastic force on the pressure rod 25 and drives the pressure rod 25 to rotate, so that one end of the protrusion 27 is close to the connecting rod 8 and finally snaps into the slot 1 29 and the slot 2 30, so that the protrusion 27 can complete the snap connection of the test hook 9 in the connecting rod 8, and through the elastic force of the elastic member, one end of the protrusion 27 can be stably located in the slot 2 30 and limit the test hook 9 from being separated from the connecting rod 8.

[0033] like Figure 3 As shown, a fixed block 20 is also provided on the frame, and a roller 21 for tensioning a synchronous belt 22 is rotatably connected to the fixed block 20 .

[0034] When the synchronous belt 22 is too loose to synchronize with the synchronous wheel 23, a roller 21 may be installed on the fixed block 20 to tension the synchronous belt 22 through the roller 21 so that the synchronous belt 22 can fit tightly with the synchronous wheel 23, thereby better synchronizing the synchronous belt 22 with the synchronous wheel 23.

[0035] like Figure 2As shown, ribs 11 are provided on both sides of the upper clamp plate 10 and between the base 3 , and two accordion-pleated dust strips 5 are provided between the two ribs 11 , one dust strip 5 is provided between the upper clamp plate 10 and the tension and pressure sensor 6 , and the other dust strip 5 is provided between the tension and pressure sensor 6 and the base 3 .

[0036] By providing the dustproof strip 5, when dust is raised in the working environment, external dust is prevented from entering the dustproof housing 1, thereby ensuring the stable operation of the single-station spring testing machine.

[0037] Working principle:

[0038] When actually using the single-station spring testing machine to test the tension or pressure of the spring, the staff first fixes the two ends of the spring to be tested on the test hook 9 or between the pressure plate 1 7 and the pressure plate 2 4, and then starts the motor 17. The motor 17 starts to drive the output shaft to rotate, and under the synchronous action of the synchronous belt 22 on the synchronous wheel 23, the screw rod 1 16 and the screw rod 2 24 rotate synchronously, thereby driving the movable plate 15 to drive the tension and pressure sensor 6 to slide up and down, and then driving the two test hooks 9 or the pressure plate 1 7 and the pressure plate 2 4 to move closer to or away from each other, thereby completing the spring test and obtaining feedback information on the computer 2.

[0039] When the test hook 9 needs to be disassembled due to bending and damage, the staff only needs to press the end of the pressure rod 25 away from the protrusion 27 to make the pressure rod 25 rotate and drive the protrusion 27 to disengage from the slot 1 29 and the slot 2 30, so that the test hook 9 can be easily disengaged from the connecting rod 8.

[0040] When the test hook 9 needs to be installed, the staff only needs to press the end of the pressure rod 25 away from the protrusion 27 to make the protrusion 27 disengage from the slot 1 29, and then put one end of the test hook 9 into the round hole 33 and align the slot 1 29 with the slot 2 30. Then the staff cancels the force applied to the pressure rod 25, and the elastic member returns to its original state and drives the pressure rod 25 to rotate, thereby driving the protrusion 27 to be inserted into the slot 1 29 and the slot 2 30, and the installation of the test hook 9 is completed.

[0041] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of protection claimed by the utility model. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A single-station spring testing machine, characterized in that: The invention comprises a base (3) and a frame arranged above the base (3); a test piece is slidably connected in the frame; a pressure test module (32) is arranged between the test piece and the base (3); a tension test module (31) is arranged between the test piece and the top of the frame; a motor (17) is arranged on the frame; a screw rod (16) and a screw rod (24) are rotatably connected in the frame; the screw rod (16), the screw rod (24) and the motor (17) are connected to each other through a transmission structure; the transmission structure comprises synchronous wheels (23) respectively arranged on the screw rod (16), the screw rod (24) and the motor (17); a synchronous belt (22) is arranged between the outer sides of the three synchronous wheels (23); and the test piece is threadedly connected to the screw rod (16) and the screw rod (24).

2. A single-station spring testing machine according to claim 1, characterized in that: The test piece comprises a movable plate (15) threadedly connected to a first screw rod (16) and a second screw rod (24), and a tension and pressure sensor (6) is arranged on the movable plate (15).

3. A single-station spring testing machine according to claim 2, characterized in that: The pressure test module (32) includes a pressure plate 1 (7) arranged at the bottom of the tension and pressure sensor (6), and a pressure plate 2 (4) used in conjunction with the pressure plate 1 (7) is arranged on the base (3). The tension test module (31) includes an upper fixture plate (10) arranged at the top of the frame and at a position relative to the tension and pressure sensor (6), and connecting rods (8) are arranged on the side opposite to the tension and pressure sensor (6), and test hooks (9) are arranged on the opposite ends of the two connecting rods (8).

4. A single-station spring testing machine according to claim 3, characterized in that: The test hook (9) is detachably connected to the connecting rod (8), and a round hole (33) for the test hook (9) to be inserted is provided on the connecting rod (8).

5. A single-station spring testing machine according to claim 4, characterized in that: The connecting rod (8) is provided with a first clamping groove (29), the testing hook (9) is provided with a second clamping groove (30), and the connecting rod (8) is provided with a connecting piece for clamping into the first clamping groove (29) and the second clamping groove (30) to limit the testing hook (9) from being separated from the circular hole (33).

6. A single-station spring testing machine according to claim 5, characterized in that: The connecting member comprises an articulated seat (26), a pressure rod (25) is rotatably connected to the articulated seat (26), and a protrusion (27) for being inserted into a second card slot (30) is provided at one end of the pressure rod (25).

7. A single-station spring testing machine according to claim 6, characterized in that: An elastic member is fixed between one end of the pressure rod (25) away from the protrusion (27) and the connecting rod (8).

8. The single-station spring testing machine according to claim 1, characterized in that: The frame is also provided with a fixed block (20), and a roller (21) for tensioning a synchronous belt (22) is rotatably connected to the fixed block (20).

9. A single-station spring testing machine according to claim 3, characterized in that: Guard edges (11) are provided between the two sides of the upper fixture plate (10) and the base (3), and an accordion-type dustproof strip (5) is provided between the two guard edges (11).

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