Automatic control testing machine for flat spiral spring

Abstract

The application relates to the technical field of spring testing, in particular to a plane volute spring automatic control testing machine, which comprises a machine body, an end fixing structure for fixing the end of a volute spring and a driving structure for driving the contraction of the volute spring, the machine body is rotationally connected with a central shaft, the central shaft is provided at one end with a volute spring clamping groove for clamping the center of the volute spring, the driving structure is connected with the central shaft and can drive the rotation of the central shaft, and the central shaft is connected with a torque detection, recording and display device for detecting torque, so that the durability of the volute spring can be detected.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of spring testing, in particular to a planar volute spring automatic control testing machine. BACKGROUND

[0002] A patent with the publication number CN118224375A discloses a valve structure with a high-performance spring rotary accumulator, which is driven by the rebound of a volute spring to open and close the valve. In order to prevent the valve control structure from malfunctioning, the volute spring needs to be subjected to durability testing.

[0003] Therefore, there is an urgent need for a testing machine capable of performing durability testing on a volute spring. SUMMARY

[0004] The application provides a planar volute spring automatic control testing machine to perform durability testing on a volute spring.

[0005] The above technical purpose of the application is achieved by the following technical scheme:

[0006] The planar volute spring automatic control testing machine comprises a machine body, an end fixing structure for fixing the end of the volute spring, and a driving structure for driving the contraction of the volute spring. The machine body is rotationally connected with a central shaft, the central shaft is provided with a volute spring clamping groove at one end for clamping the center of the volute spring. The driving structure is connected with the central shaft and can drive the rotation of the central shaft. The central shaft is connected with a torque detection, recording and display device for detecting the torque.

[0007] By adopting the above scheme, the driving structure drives the rotation of the central shaft, the central shaft drives the deformation of the central position of the volute spring, and the end fixing structure fixes the end of the volute spring, so that the volute spring does not move. Then, the torque detection, recording and display device detects the torque required for the rotation of the central shaft to detect the torque generated by the deformation of the volute spring, and records the torque change of each deformation of the volute spring through the torque detection, recording and display device, thereby achieving the durability testing of the volute spring.

[0008] Optionally, the machine body is internally provided with a torque sensor, the central shaft penetrates through the torque sensor, and the central shaft is fixedly connected with a first transmission gear. The first transmission gear is engaged with a second transmission gear. The torque sensor is fixedly connected with an angle detector, the angle detector is connected with the second transmission gear, and the torque detection, recording and display device is connected with the torque sensor.

[0009] By adopting the above scheme, the torque during the rotation of the central shaft can be detected, and the rotation angle of the central shaft can also be detected.

[0010] Optionally, the driving structure comprises a driving motor, the output shaft is provided with a first worm gear at one end away from the volute spring, the first worm gear is engaged with a first worm, and the first worm is connected with the driving motor.

[0011] By adopting the above scheme, the torque required for the driving motor to rotate the central shaft is reduced through the transmission of the first worm gear and the worm, so that the driving motor can more smoothly drive the central shaft to rotate.

[0012] Optionally, the first worm is fixedly connected with a second worm gear, the second worm gear is engaged with a second worm, and the second worm is connected with the output shaft of the driving motor.

[0013] By adopting the above scheme, the torque required for the driving motor to rotate the central shaft is further reduced, so that the driving motor can more smoothly drive the central shaft to rotate.

[0014] Optionally, the second worm is connected with a second pulley at one end away from the driving motor, the machine body is rotatably connected with a wheel rod, one end of the wheel rod penetrates out of the machine body, one end of the wheel rod inside the machine body is fixedly connected with a first pulley, the first pulley and the second pulley are connected through a belt, and one end of the wheel rod penetrating out of the machine body is fixedly connected with a hand rotating wheel.

[0015] By adopting the above scheme, the operator can drive the sliding central shaft to rotate by rotating the hand rotating wheel, so that the volute spring can be detected even when the power is off.

[0016] Optionally, the central shaft is provided with a volute spring clamping groove and a threaded groove at one end, a safety disc is arranged above the volute spring, a through hole is formed in the center of the safety disc, a fixing bolt is arranged in the through hole, and the fixing bolt is threadedly connected in the threaded groove, so that the fixing bolt covers the safety disc above the volute spring.

[0017] By adopting the above scheme, the volute spring is prevented from sliding out of the volute spring clamping groove during detection, and the personal safety of the operator is affected.

[0018] Optionally, the depth of the volute spring clamping groove is higher than the width of the volute spring, so that after the fixing bolt fixes the safety disc, the safety disc does not contact the volute spring.

[0019] By adopting the above scheme, the safety disc is prevented from rubbing against the volute spring when the volute spring deforms, so as to avoid errors in the measurement results and abrasion of the volute spring.

[0020] Optionally, the end fixing structure comprises a protrusion, the protrusion is provided with a threaded hole, a fixing bolt is threadedly connected in the threaded hole, a nut of the fixing bolt is located on a side of the protrusion away from the volute spring, the fixing bolt is threadedly connected with a threaded sleeve, the threaded sleeve is located on an end of the fixing bolt away from the nut, the threaded sleeve is threadedly connected with a second bolt at an end of the threaded sleeve away from the fixing bolt, the second bolt passes through a through hole at an end of the volute spring, and a nut of the second bolt is located on a side of the end of the volute spring away from the threaded sleeve.

[0021] By adopting the above scheme, when the volute spring is installed, the volute spring is first inserted into the volute spring clamping groove at a center position, then the fixing bolt is screwed into the threaded hole, the threaded sleeve is threadedly connected at an end of the fixing bolt, then the second bolt passes through the through hole at the end of the volute spring, and the second bolt is screwed into the threaded sleeve, so that the end of the volute spring is fixed.

[0022] Optionally, the second worm is provided with a conversion groove at each end, the conversion groove is slidably connected with a plug rod, a communication hole is formed in an inner wall of the conversion groove, the communication hole is communicated with a circumferential surface of the worm, a locking connection groove is formed in the plug rod opposite to the communication hole, the second worm is connected with a conversion bolt, the conversion bolt passes through the communication hole and is threadedly connected in the locking connection groove, and the two plug rods are fixedly connected with the second pulley and the driving motor respectively.

[0023] By adopting the above scheme, when the driving motor drives the central shaft to rotate, the operator inserts the plug rod connected with the driving motor into the conversion groove, screws the conversion bolt into the communication hole, and screws the conversion bolt into the locking connection groove, so that the plug rod connected with the driving motor is fixedly connected with the second worm; when it is needed to manually drive the central shaft to rotate, the plug rod connected with the second pulley is inserted into the conversion groove, the conversion bolt is screwed into the communication hole, and the conversion bolt is screwed into the locking connection groove, so that the plug rod connected with the second pulley is fixedly connected with the second worm.

[0024] Optionally, the plug rod comprises a main rod and a plug-in rod, the main rod is provided with a plug-in groove at one end, the plug-in rod is slidably connected in the plug-in groove, a spring is arranged in the plug-in groove, one end of the spring is fixedly connected with the plug-in groove, the other end of the spring is fixedly connected with the plug-in rod, a screw hole is formed in a circumferential surface of the main rod close to the end where the plug-in groove is formed, an inclined groove is arranged on the plug-in rod opposite to the screw hole, and a third bolt is threadedly connected in the screw hole; when the third bolt is screwed into the screw hole, the third bolt drives the plug-in rod to completely slide into the plug-in groove.

[0025] By adopting the above scheme, when the insertion rod needs to be inserted into the conversion groove, the operator can rotate the third bolt, so that the third bolt is rotated outward in the screw hole, and the spring rebounds to drive the insertion rod to be inserted into the conversion groove; when the insertion rod needs to be moved out of the conversion groove, the operator can rotate the third bolt, so that the third bolt moves inward in the screw hole, and the end portion of the third bolt is inserted into the inclined groove, thereby driving the insertion rod to slide into the insertion groove, and then the insertion rod slides out of the conversion groove.

[0026] In summary, the present application has the following technical effects:

[0027] 1. By setting the driving structure and the center shaft, and fixing the end of the volute spring through the end fixing structure, the driving structure drives the center shaft and the volute spring to rotate, and the torque of the center shaft is detected through the torque detection structure, so as to realize the detection of the volute spring;

[0028] 2. By setting the first worm gear and the first worm, the torque of the rotating center shaft is smaller;

[0029] 3. By setting the safety disc, the volute spring is prevented from being separated from the clamping groove during testing. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic diagram of the overall structure of the present application;

[0031] Figure 2 is a partial structure explosion diagram of the safety disc of the present application;

[0032] Figure 3 is a cross-sectional view of the end fixing structure of the present application;

[0033] Figure 4 is a partial structure schematic diagram of the torque detection structure of the present application;

[0034] Figure 5 is a partial structure schematic diagram of the driving structure of the present application;

[0035] Figure 6 is a partial structure schematic diagram of the hand wheel of the present application;

[0036] Figure 7 is a partial structure cross-sectional view of the insertion rod of the present application;

[0037] Figure 8 is Figure 7 a local enlarged schematic diagram of A in the present application.

[0038] In the figure, 1, the body; 11, torque sensor; 2, end fixed structure; 21, protrusion; 22, end fixed bolt; 23, threaded sleeve; 24, second bolt; 3, drive motor; 31, first worm gear; 32, first worm; 33, second worm gear; 34, second worm; 341, conversion groove; 342, communication hole; 343, conversion bolt; 4, center shaft; 41, first transmission gear; 42, second transmission gear; 43, angle detector; 44, worm spring slot; 45, threaded groove; 46, safety disc; 47, fixed bolt; 5, torque detection record display; 6, hand wheel; 61, wheel rod; 611, first pulley; 62, belt; 63, second pulley; 7, insertion rod; 71, main rod; 711, insertion slot; 712, screw hole; 713, third bolt; 7131, abutment; 72, insertion rod; 721, spring; 722, inclined groove; 723, locking connection slot. DETAILED DESCRIPTION

[0039] The application will be further described in detail below with reference to the accompanying drawings.

[0040] REFERENCE Figure 1 and Figure 2 The plane worm spring automatic control tester comprises a body 1, an end fixed structure 2 for fixing the end of the worm spring, and a driving structure for driving the contraction of the worm spring. The body 1 is rotationally connected with a vertically arranged center shaft 4. A worm spring clamping groove 44 for clamping the center of the worm spring is arranged at the top end of the center shaft 4. The driving structure is connected with the center shaft 4 and can drive the rotation of the center shaft 4. The driving structure can be a motor or a combination of a motor and a speed reducer. The center shaft 4 is connected with a torque sensor 11 for detecting torque. The driving structure drives the rotation of the center shaft 4, which drives the deformation of the center of the worm spring. The end fixed structure 2 fixes the end of the worm spring, so that the worm spring does not move. Then, the torque sensor 11 detects the torque required for the rotation of the center shaft 4, thereby detecting the torque generated by the deformation of the worm spring. The torque detection record display 5 records the torque change of each deformation of the worm spring, thereby realizing the durability detection of the worm spring.

[0041] REFERENCE Figure 2The top end of the center shaft 4 is provided with a threaded groove 45, and the volute spring is provided with a safety disc 46 above the volute spring, the center of the safety disc 46 is provided with a through hole, and the through hole is provided with a fixing bolt 47, the fixing bolt 47 is threadedly connected in the threaded groove 45, so that the fixing bolt 47 covers the safety disc 46 above the volute spring. The volute spring clamping groove 44 is provided in the vertical direction. The depth is higher than the width of the volute spring, so that after the fixing bolt 47 fixes the safety disc 46, the safety disc 46 is not in contact with the volute spring, so as to avoid the friction between the safety disc 46 and the volute spring when the volute spring deforms, thereby reducing the test error as much as possible. The safety disc 46 can prevent the volute spring from sliding out of the volute spring clamping groove 44 during detection, and can protect the personal safety of the operator.

[0042] With reference to Figure 2 And Figure 3 The end fixing structure 2 includes a protrusion 21, the protrusion 21 is provided with a threaded hole, and the threaded hole is threadedly connected with an end fixing bolt 22, and the nut of the end fixing bolt 22 is located on the side of the protrusion 21 away from the volute spring. The end fixing bolt 22 is threadedly connected with a threaded sleeve 23, the threaded sleeve 23 is located at the end of the end fixing bolt 22 away from the nut, the end of the threaded sleeve 23 away from the end fixing bolt 22 is threadedly connected with a second bolt 24, the second bolt 24 passes through the through hole provided at the end of the volute spring, so that the nut of the second bolt 24 is located on the side of the end of the volute spring away from the threaded sleeve 23. When installing the volute spring, first insert the buckle at the center position of the volute spring into the volute spring clamping groove 44, then screw the end fixing bolt 22 into the threaded hole, and threadedly connect the threaded sleeve 23 at the end of the end fixing bolt 22, then pass the second bolt 24 through the through hole at the end of the volute spring, and screw the second bolt 24 into the threaded sleeve 23, so as to fix the end of the volute spring.

[0043] With reference to Figure 4 The machine body 1 is provided with a torque sensor 11, the torque sensor 11 is fixed with the machine body 1 through a rack, and the center shaft 4 passes through the torque sensor 11 and is in rotating cooperation with the torque sensor 11. In the embodiment, the torque sensor 11 can also be connected with the center shaft 4 in the form of a shaft coupling. Different connection modes can be adopted according to the selection of different torque sensors 11, which will not be described here. The bottom end of the center shaft 4 is fixedly connected with a first transmission gear 41, the first transmission gear 41 is engaged with a second transmission gear 42, the surface of the torque sensor 11 is fixedly connected with an angle detector 43, the angle detector 43 is connected with the second transmission gear 42, and the torque detection and recording display 5 is connected with the torque sensor 11.

[0044] With reference to Figure 5The driving structure comprises a driving motor 3, a first worm wheel 31 arranged at the bottom end of the central shaft 4, a first worm 32 engaged with the first worm wheel 31, a second worm wheel 33 fixedly connected with the first worm 32, a second worm 34 engaged with the second worm wheel 33, and the second worm 34 is connected with the output shaft of the driving motor 3. By arranging the first worm wheel 31, the first worm 32, the second worm wheel 33 and the second worm 34, a two-stage speed reduction mechanism is formed, which reduces the torque required for the driving motor 3 to rotate the central shaft 4, so that the driving motor 3 can more smoothly drive the central shaft 4 to rotate.

[0045] With reference to Figure 6 The second worm 34 is connected with a second pulley 63 at the end away from the driving motor 3, the machine body 1 is rotatably connected with a wheel rod 61, one end of the wheel rod 61 penetrates through the machine body 1, one end of the wheel rod 61 inside the machine body 1 is fixedly connected with a first pulley 611, the first pulley 611 and the second pulley 63 are connected through a belt 62, and one end of the wheel rod 61 penetrating through the machine body 1 is fixedly connected with a hand wheel 6. The operator can drive the central shaft 4 to rotate by rotating the hand wheel 6, so that the detection of the volute spring can be performed even when the power is off.

[0046] With reference to Figure 7 The second worm 34 comprises a middle section for mounting a worm body structure and two end plug rods 7, one of which is fixed to the output shaft of the driving motor 3, and the other is fixedly connected to the second pulley 63. During the test, the connection or disconnection of the plug rod 7 and the middle section can be selected according to whether the manual test mode is used.

[0047] The middle section of the second worm 34 is provided with a conversion groove 341 at both ends, a communication hole 342 is arranged in the inner wall of the conversion groove 341, the communication hole 342 communicates with the circumferential surface of the second worm 34, and a conversion bolt 343 is arranged in the communication hole 342.

[0048] The plug rod 7 comprises a main rod 71 and a plug-in rod 72, the end of the main rod 71 opposite to the conversion groove 341 is provided with a plug-in groove 711, a spring 721 is arranged in the plug-in groove 711, one end of the spring 721 is fixedly connected with the end of the plug-in groove 711, the other end of the spring 721 is fixedly connected with the plug-in rod 72, the plug-in rod 72 is slidingly connected in the plug-in groove 711, and when the spring 721 is in the original length state, the end of the plug-in rod 72 extends into the inside of the conversion groove 341.

[0049] The main body rod 71 is provided with a screw hole 712 in the circumferential surface, the insertion rod 72 is provided with an inclined groove 722 opposite to the screw hole 712, and the third bolt 713 is threadedly connected in the screw hole 712. When the third bolt 713 is screwed into the screw hole 712, the bottom end of the third bolt 713 is matched with the inclined groove 722, so that the third bolt 713 drives the insertion rod 72 to completely slide into the insertion slot 711. When it is needed to insert the insertion rod 72 into the conversion slot 341, the operator can rotate the third bolt 713, so that the third bolt 713 is screwed out of the screw hole 712, and the spring 721 is rebounded to drive the insertion rod 72 to be inserted into the conversion slot 341. Further, the insertion rod 72 is provided with a locking connection groove 723 opposite to the communication hole 342, and after the insertion rod 72 is inserted into the conversion slot 341, the conversion bolt 343 can be rotated to fix the insertion rod 72 and the second worm 34 by the conversion bolt 343. When it is needed to move the insertion rod 72 out of the conversion slot 341, the operator can rotate the third bolt 713, so that the third bolt 713 moves inward in the screw hole 712, and the end of the third bolt 713 is inserted into the inclined groove 722, thereby driving the insertion rod 72 to slide into the insertion slot 711, and further driving the insertion rod 72 to slide out of the conversion slot 341.

[0050] Further, as shown in Figure 8 the bottom end of the third bolt 713 is provided with an abutting portion 7131, the abutting portion 7131 is rotationally connected with the third bolt 713, and the bottom end of the abutting portion 7131 is provided with an inclined shape matched with the inclined groove 722, so that in the process of rotating and lifting the third bolt 713, the abutting portion 7131 can better realize the extension and retraction of the insertion rod 72 by matching with the inclined groove 722.

[0051] The specific implementation principle of the present application is that when it is needed to detect the volute spring, the volute spring is placed above the machine body 1, the center of the volute spring is clamped into the volute spring clamping groove 44, the second bolt 24 is inserted through the through hole of the end of the volute spring and screwed into the threaded sleeve 23, then the driving motor 3 drives the second worm 34 to rotate, thereby driving the second worm wheel 33 to rotate, further driving the first worm 32 to rotate, thereby driving the first worm wheel 31 and the center shaft 4 to rotate, the center shaft 4 drives the volute spring to deform, then the torque detection structure 5 detects the torque required for the rotation of the center shaft 4, thereby detecting the torque generated by the deformation of the volute spring, and the torque detection structure 5 records the torque change of each deformation of the volute spring, thereby realizing the endurance detection of the volute spring.

[0052] The specific embodiment is only an explanation of the present application, and is not a limitation of the present application. Those skilled in the art can make modifications to the present embodiment without creative contribution after reading the present specification, but as long as the modifications are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. An automatic control testing machine for planar spiral springs, characterized in that: The device includes a body (1), an end-fixing structure (2) for fixing the end of the worm spring, and a drive structure for driving the worm spring to retract. The body (1) is rotatably connected to a central shaft (4). One end of the central shaft (4) has a worm spring slot (44) for the center of the worm spring to be inserted. The drive structure is connected to the central shaft (4) and can drive the central shaft (4) to rotate. The central shaft (4) is connected to a torque detection and recording display (5) for detecting torque. The drive structure includes a drive motor (3). The output shaft of the drive motor (3) is provided with a first worm wheel (31) at the end away from the worm spring. The first worm wheel (31) meshes with a first worm (32). The first worm (32) is connected to the drive motor (3). The first worm (32) is fixedly connected to a second worm wheel (33), the second worm wheel (33) meshes with a second worm (34), and the second worm (34) is connected to the output shaft of the drive motor (3); the second worm (34) is connected to a second pulley (63) at the end away from the first drive motor (3), the machine body (1) is rotatably connected to a wheel rod (61), and one end of the wheel rod (61) extends out of the machine body (1). The wheel rod (61) is located inside the machine body (1) and is fixedly connected to a first pulley (611). The first pulley (611) and the second pulley (63) are connected by a belt (62), and the wheel rod (61) extending out of the machine body (1) is fixedly connected to a handwheel (6); both ends of the second worm (34) are A conversion groove (341) is provided, and a plug rod (7) is slidably connected in the conversion groove (341). A connecting hole (342) is provided on the inner wall of the conversion groove (341), and the connecting hole (342) is connected to the circumferential surface of the worm. A locking connection groove (723) is provided on the plug rod (7) opposite to the connecting hole (342). A conversion bolt (343) is connected to the second worm (34). The conversion bolt (343) passes through the connecting hole (342) and is threadedly connected in the locking connection groove (723). The two plug rods (7) are fixedly connected to the second pulley (63) and the drive motor (3) respectively. The plug rod (7) includes a main rod (71) and an insertion rod (72). A slot is provided at one end of the main rod (71). (711) The insertion rod (72) is slidably connected in the slot (711), and a spring (721) is provided in the slot (711). One end of the spring (721) is fixedly connected to the slot (711), and the other end of the spring (721) is fixedly connected to the insertion rod (72). A screw hole (712) is provided on the circumferential surface of the main rod (71) near the end of the slot (711). A beveled groove (722) is provided on the insertion rod (72) opposite the screw hole (712). A third bolt (713) is threaded in the screw hole (712). When the third bolt (713) is screwed into the screw hole (712), the third bolt (713) drives the insertion rod (72) to slide completely into the slot (711).

2. The planar spiral spring automatic control testing machine according to claim 1, characterized in that: The body (1) is equipped with a torque sensor (11), a central shaft (4) passes through the torque sensor (11), and a first transmission gear (41) is fixedly connected to the central shaft (4). The first transmission gear (41) meshes with a second transmission gear (42). An angle detector (43) is fixedly connected to the surface of the torque sensor (11). The angle detector (43) is connected to the second transmission gear (42). A torque detection recording display (5) is connected to the torque sensor (11).

3. The planar spiral spring automatic control testing machine according to claim 1, characterized in that: The central shaft (4) has a worm spring groove (44) and a threaded groove (45) at one end. A safety disc (46) is provided on top of the worm spring. A through hole is provided in the center of the safety disc (46). A fixing bolt (47) is provided in the through hole. The fixing bolt (47) is threaded into the threaded groove (45) so that the fixing bolt (47) covers the safety disc (46) on top of the worm spring.

4. The planar spiral spring automatic control testing machine according to claim 3, characterized in that: The depth of the worm spring slot (44) is greater than the width of the worm spring, so that after the fixing bolt (47) fixes the safety disc (46), the safety disc (46) does not contact the worm spring.

5. The planar spiral spring automatic control testing machine according to claim 1, characterized in that: The end-fixing structure (2) includes a protrusion (21), which has a threaded hole and an end-fixing bolt (22) is threadedly connected inside the threaded hole. The nut of the end-fixing bolt (22) is located on the side of the protrusion (21) away from the worm spring. The end-fixing bolt (22) is threadedly connected to a threaded sleeve (23), which is located on the end of the end-fixing bolt (22) away from the nut. The end of the threaded sleeve (23) away from the end-fixing bolt (22) is threadedly connected to a second bolt (24). The second bolt (24) passes through the through hole at the end of the worm spring, so that the nut of the second bolt (24) is located on the side of the end of the worm spring away from the threaded sleeve (23).

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