Spring load detector

Abstract

The utility model belongs to the technical field of spring production equipment, and particularly relates to a spring load detector which comprises a frame body and a pressing head, a downward telescopic rod is arranged on the frame body, the free end of the telescopic rod is downward, an extrusion rod is coaxially arranged at the free end of the telescopic rod, a pressure sensor is arranged between the two ends of the extrusion rod in a sleeving mode, and a first hole is formed in the top end of the pressing head. A flange is arranged on the inner side wall of the upper end of the first hole, the end, away from the telescopic rod, of the extrusion rod extends into the first hole, a limiting protrusion is radially arranged at the end, extending into the first hole, of the extrusion rod, and the pressure sensor is in signal connection with the telescopic rod. By arranging the telescopic rod and the pressure sensor, the designed spring load detector can be matched with a production line to automatically detect the load of the spring, and the problem of how to be matched with the production line to detect the spring load is solved.

Description

Technical Field

[0001] The present application belongs to the technical field of spring production equipment, and specifically relates to a spring load detector. Background Art

[0002] After the springs are produced, the spring load needs to be tested to distinguish the defective products and classify the springs according to the load they can withstand. At present, the conventional way to test the springs is that workers use testing devices to test the springs. However, with the advent of intelligent production lines, after the springs are produced, they are directly transported to the load testing station for testing using a conveying device. After the test, the springs are transported to the specified placement areas using a classification device. Therefore, it is necessary to design a spring testing device that can match the production line, thereby reducing manual positions and reducing labor costs. Utility Model Content

[0003] The purpose of this application is to address the shortcomings of the prior art. By setting up a telescopic rod and a pressure sensor, a spring load detector is designed that can match the production line to automatically detect the load of the spring, thereby solving the problem of how to match the production line for spring load detection.

[0004] To achieve the above objectives, this application provides the following technical solutions:

[0005] A spring load detector comprises a frame and a pressure head, wherein a downward telescopic rod is arranged on the frame, the free end of the telescopic rod is downward, an extrusion rod is coaxially arranged at the free end of the telescopic rod, a pressure sensor is sleeved between the two ends of the extrusion rod, a first hole is arranged at the top end of the pressure head, a flange is arranged on the inner side wall of the upper end of the first hole, an end of the extrusion rod away from the telescopic rod extends into the first hole, a limiting protrusion is radially arranged at the end of the extrusion rod extending into the first hole, and the pressure sensor signal is connected to the telescopic rod.

[0006] Preferably, a second hole is provided at the lower end of the pressure head, and the axis of the second hole is parallel to the telescopic rod.

[0007] Preferably, the upper end of the second hole is provided with an air hole communicating with the lower end of the first hole.

[0008] Preferably, the sensing surface of the pressure sensor contacts the upper end of the pressure head.

[0009] Preferably, the telescopic rod includes a servo motor, a mounting plate, a guide rod, a screw rod, and a shell, the mounting plate is arranged at the top end of the frame, the servo motor is fixedly arranged on the back side of the frame, the mounting plate is hollow inside, a first transmission wheel and a second transmission wheel are arranged inside the mounting plate, the first transmission wheel is transmission-connected to the second transmission wheel, an axis of the first transmission wheel and an axis of the second transmission wheel are both vertically arranged, an output shaft of the servo motor is coaxially connected to the first transmission wheel, the second transmission wheel is coaxially connected to the screw rod, the shell is fixed to the front side of the frame, the upper and lower ends of the shell are open, a vertical guide rod is slidingly arranged in the shell, an internally threaded long hole is coaxially arranged on the upper end of the guide rod, an end of the screw rod away from the second transmission wheel is threadedly connected to the internally threaded long hole, and the extrusion rod is coaxially arranged on the lower end of the guide rod.

[0010] Preferably, the inner cross section of the shell is rectangular, a sliding block is provided in the shell, the projection of the sliding block on the cross section of the shell is the same as the shape and size of the inner cross section of the shell, and the sliding block is fixedly connected between the two ends of the guide rod.

[0011] Preferably, a guide rail is provided on the frame, the guide rail is parallel to the telescopic rod, and a sliding block is fixedly provided on the free end of the extrusion rod and is slidably connected between the two ends of the guide rail.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This application designs a spring load detector by setting a telescopic rod and a pressure sensor, which can match the production line to automatically detect the load of the spring, solving the problem of how to match the production line for spring load detection.

[0014] 2. In order to keep the spring in a vertical state during the transportation of the spring on the conveying device, a vertical positioning rod is provided on the conveying device so that the spring is in a vertical state when it is transported to directly below the pressure head. Therefore, in order to prevent the pressure head from being supported by the positioning rod during the process of pressing the spring, the present application provides a second hole at the lower end of the pressure head, and the axis of the second hole is parallel to the telescopic rod, so that the second hole is used to avoid the positioning rod.

[0015] 3. The present application prevents the guide rod from rotating under the action of the screw rod by setting the sliding block. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of this application;

[0017] Figure 2 A schematic diagram showing the limit protrusion when the pressure head is removed in this application;

[0018] Figure 3 is the cross-sectional view of the pressure head;

[0019] Figure 4 It is a cross-sectional view of the telescopic rod.

[0020] In the figure: 1. frame; 2. pressure sensor; 3. first hole; 4. extrusion rod; 5. second hole; 6. limit protrusion; 7. flange; 8. pressure head; 9. servo motor; 10. mounting plate; 11. guide rod; 12. screw rod; 13. housing; 14. first transmission wheel; 15. second transmission wheel; 16. sliding block; 17. guide rail; 18. slider; 19. transmission belt. DETAILED DESCRIPTION

[0021] like Figure 1-4 As shown, a spring load detector includes a frame 1 and a pressure head 8. A downward telescopic rod is arranged on the frame 1, and the free end of the telescopic rod is downward. An extrusion rod 4 is coaxially arranged at the free end of the telescopic rod, and a pressure sensor 2 is sleeved between the two ends of the extrusion rod 4. A first hole 3 is arranged at the top of the pressure head 8, and a flange 7 is arranged on the inner side wall of the upper end of the first hole 3. The end of the extrusion rod 4 away from the telescopic rod extends into the first hole 3, and a limiting protrusion 6 is radially arranged on the end of the extrusion rod 4 extending into the first hole 3. The signal of the pressure sensor 2 is connected to the telescopic rod.

[0022] In this embodiment, when in use, the pressure sensor 2 signal in this application is generally connected to an industrial computer or a PLC system, the conveying device conveys the spring to the right below the pressure head 8, the telescopic rod is extended, so that the pressure head 8 drops and applies pressure to the spring, and the pressure sensor 2 feeds back the pressure of the spring on the pressure head 8 to the industrial computer or the PLC system, thereby obtaining the load that the spring can bear. In actual use, when the pressure felt by the pressure sensor 2 has not reached the preset value, the telescopic rod cannot continue to extend, which means that the spring being tested cannot withstand the preset load and is a substandard product. The setting of the first hole 3 makes the pressure head and the extrusion rod 4 detachable, and the setting of the first hole 3 and the limiting protrusion 6 makes the pressure head 8 have a tendency to move relative to the extrusion rod 4 when it is installed on the extrusion rod 4 and subjected to external force, so that the reaction force of the spring on the pressure head 8 can act on the pressure sensor 2 when the pressure head 8 is extruded on the spring being tested. At the same time, when the spring being tested does not squeeze the pressure head 8, the pressure head 8 will not be separated from the extrusion rod 4.

[0023] As a preferred manner, in order to keep the spring in a vertical state during the transportation of the spring on the conveying device, a vertical positioning rod is provided on the conveying device so that the spring is in a vertical state when it is transported to directly below the pressing head 8. Therefore, in order to prevent the pressing head 8 from being supported by the positioning rod during the process of pressing the spring down, a second hole 5 is provided at the lower end of the pressing head 8, and the axis of the second hole 5 is parallel to the telescopic rod.

[0024] As a preferred embodiment, the upper end of the second hole 5 is provided with an air hole connected with the lower end of the first hole 3. When the pressure head 8 squeezes the detected spring, the gas in the first hole 3 needs to be discharged to the outside of the first hole 3 during the process of the squeezing rod 4 extending into the first hole 3. Therefore, the air hole is provided to prevent the gas from being unable to be discharged during the process of the squeezing rod 4 being inserted into the first hole 3. The inner diameter of the air hole is smaller than the inner diameter of the first hole 3 and the inner diameter of the second hole 5.

[0025] As a preferred embodiment, the sensing surface of the pressure sensor 2 contacts the upper end of the pressure head 8. This arrangement ensures that there is no gap between the pressure sensor 2 and the upper end of the pressure head 8, thereby preventing the upper end of the pressure head 8 from hitting the pressure sensor 2 when the pressure head 8 squeezes the detected spring, thereby preventing the pressure sensor 2 from being damaged.

[0026] As a preferred embodiment, the telescopic rod includes a servo motor 9, a mounting plate 10, a guide rod 11, a screw rod 12, and a shell 13. The mounting plate 10 is arranged at the top of the frame 1, and the servo motor 9 is fixedly arranged on the back of the frame 1. The mounting plate 10 is hollow inside. A first transmission wheel 14 and a second transmission wheel 15 are arranged inside the mounting plate 10. The first transmission wheel 14 and the second transmission wheel 15 are transmission-connected. The axis of the first transmission wheel 14 and the axis of the second transmission wheel 15 are both vertically arranged. The output shaft of the servo motor 9 is coaxially connected to the first transmission wheel 14, and the second transmission wheel 15 is coaxially connected to the screw rod 12. The shell 13 is fixed to the front of the frame 1. The upper and lower ends of the shell 13 are open. A vertical guide rod 11 is slidably arranged in the shell 13. The upper end of the guide rod 11 is coaxially provided with an internally threaded long hole. The end of the screw rod 12 away from the second transmission wheel 15 is threadedly connected to the internally threaded long hole, and the lower end of the guide rod 11 is coaxially arranged with the extrusion rod 4. After such arrangement, the servo motor 9 drives the first transmission wheel 14 and the second transmission wheel 15 to rotate, and then drives the screw rod 12 to rotate. The rotation of the screw rod 12 drives the guide rod 11 to extend or retract on the housing 13, thereby achieving the function of controlling the extension and retraction of the extrusion rod 4.

[0027] Preferably, the first transmission wheel 14 and the second transmission wheel 15 are connected to each other via a transmission belt 19 .

[0028] Preferably, the length of the internal threaded slot is greater than half the length of the guide rod 11 and less than the length of the guide rod 11. This allows the extrusion rod 4 to have a longer elongation range and prevents the guide rod 11 from falling off the screw rod 12.

[0029] As a preferred embodiment, the inner cross section of the housing 13 is rectangular, a sliding block 16 is provided in the housing 13, the projection of the sliding block 16 on the cross section of the housing 13 is the same as the shape and size of the inner cross section of the housing 13, and the sliding block 16 is fixedly connected between the two ends of the guide rod 11. After such an arrangement, the guide rod 11 is prevented from rotating under the action of the screw rod 12 by the arrangement of the sliding block 16.

[0030] As a preferred embodiment, the frame 1 is provided with a guide rail 17, the guide rail 17 is parallel to the telescopic rod, and a slider 18 is fixedly provided on the free end of the extrusion rod 4 and is slidably connected to the two ends of the guide rail 17. After such arrangement, the restriction on the radial movement of the extrusion rod 4 is strengthened, and the extrusion rod 14 is prevented from being radially bent during the extrusion process.

Claims

1. A spring load detector, characterized in that: The invention comprises a frame (1) and a pressure head (8), wherein a telescopic rod is arranged on the frame (1) and faces downward, the free end of the telescopic rod faces downward, a squeezing rod (4) is coaxially arranged on the free end of the telescopic rod, a pressure sensor (2) is sleeved between the two ends of the squeezing rod (4), a first hole (3) is arranged at the top end of the pressure head (8), a flange (7) is arranged on the inner side wall of the upper end of the first hole (3), an end of the squeezing rod (4) away from the telescopic rod extends into the first hole (3), a limiting protrusion (6) is radially arranged on the end of the squeezing rod (4) extending into the first hole (3), and a signal of the pressure sensor (2) is connected to the telescopic rod.

2. A spring load detector according to claim 1, characterized in that: A second hole (5) is provided at the lower end of the pressure head (8), and the axis of the second hole (5) is parallel to the telescopic rod.

3. A spring load detector according to claim 2, characterized in that: The upper end of the second hole (5) is provided with an air hole communicating with the lower end of the first hole (3).

4. A spring load detector according to claim 1, characterized in that: The sensing surface of the pressure sensor (2) contacts the upper end of the pressure head (8).

5. A spring load detector according to claim 1, characterized in that: The telescopic rod comprises a servo motor (9), a mounting plate (10), a guide rod (11), a screw rod (12), and a housing (13); the mounting plate (10) is arranged at the top end of the frame (1); the servo motor (9) is fixedly arranged at the back of the frame (1); the mounting plate (10) is hollow inside; a first transmission wheel (14) and a second transmission wheel (15) are arranged inside the mounting plate (10); the first transmission wheel (14) and the second transmission wheel (15) are transmission-connected; the axis of the first transmission wheel (14) and the axis of the second transmission wheel (15) are both vertically arranged The output shaft of the servo motor (9) is coaxially connected to the first transmission wheel (14), the second transmission wheel (15) is coaxially connected to the screw rod (12), the housing (13) is fixed on the front side of the frame (1), the upper and lower ends of the housing (13) are both open, a vertical guide rod (11) is slidably arranged in the housing (13), the upper end of the guide rod (11) is coaxially provided with an internal threaded long hole, one end of the screw rod (12) away from the second transmission wheel (15) is threadedly connected to the internal threaded long hole, and the lower end of the guide rod (11) is coaxially provided with the extrusion rod (4).

6. A spring load detector according to claim 5, characterized in that: The inner cross section of the shell (13) is rectangular. A sliding block (16) is arranged inside the shell (13). The projection of the sliding block (16) on the cross section of the shell (13) is the same in shape and size as the inner cross section of the shell (13). The sliding block (16) is fixedly connected between the two ends of the guide rod (11).

7. A spring load detector according to claim 1, characterized in that: The frame (1) is provided with a guide rail (17), the guide rail (17) is parallel to the telescopic rod, and a sliding block (18) is fixedly provided on the free end of the extrusion rod (4) and is slidably connected between the two ends of the guide rail (17).

Images