Spring tension detection device

Abstract

This utility model relates to a spring tension testing device, comprising a test platform, a displacement driving mechanism, and a spring fixing mechanism. The spring fixing mechanism includes a fixed inner cylinder and a fixed outer cylinder sleeved together. Multiple inner clamping blocks and multiple outer clamping blocks are respectively provided on the side walls of the fixed inner cylinder and the fixed outer cylinder. The inner and outer clamping blocks correspond to each other and are evenly distributed along the circumference. An inner clamping driving mechanism is provided on the fixed inner cylinder, and an outer clamping driving mechanism is provided on the fixed outer cylinder, which respectively drive the inner and outer clamping blocks to move. The test platform has an open slide groove with a sliding seat inside. A fixed seat is provided at one end of the open slide groove, and two spring fixing mechanisms are respectively installed on the sliding seat and the fixed seat. This solution clamps the spring simultaneously from both inside and outside by the inner and outer clamping blocks, effectively preventing deformation of the fixed part of the spring during tension, thus avoiding loosening. When clamping the spring, force is applied to the spring from multiple directions, ensuring that the force on the spring is at the axis, achieving excellent alignment.

Description

Technical Field

[0001] This utility model relates to the field of spring testing technology, specifically to a spring tension testing device. Background Technology

[0002] Spring tension testing devices are specialized equipment used to test the mechanical properties of springs when subjected to tension (such as maximum tensile force, elastic deformation range, ultimate tensile length, etc.), and are widely used in spring production quality inspection, industrial equipment maintenance and other fields.

[0003] The spring tension testing device mainly consists of a spring end fixing mechanism, a tension application mechanism, and a displacement measuring mechanism. In existing technologies, the spring fixing mechanism in spring tension testing devices is not secure, and the spring alignment is poor. For example, utility model patent CN212844107U discloses a spring wire elasticity testing device, which fixes the bottom of the spring with a bottom threaded limiting seat and fixes the top of the spring with a hook at the bottom of the telescopic rod. However, during the spring's tensile deformation, the spring may separate from the hook and threaded limiting seat, causing the spring to fly out, posing a safety hazard. Furthermore, the spring's force is not at the axis, making it prone to skewing.

[0004] Another example is the invention patent with publication number CN120404358A, which discloses a quick-assembly and disassembly spring steel wire tensile testing device. This device uses a threaded rod to move a movable V-block closer to a fixed V-block to clamp the end of the spring. While this method keeps the spring force centered on its axis, clamping it only from the outside means that during ultimate tensile testing, the spring is prone to deformation after being stretched a large distance, and the deformed spring easily detaches from between the two V-blocks. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical problems and provide a spring tension detection device.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a spring tension testing device, a test platform, a displacement driving mechanism, and a spring fixing mechanism. The spring fixing mechanism includes a fixed inner cylinder and a fixed outer cylinder sleeved together. Multiple inner clamping blocks and multiple outer clamping blocks are respectively provided on the side walls of the fixed inner cylinder and the fixed outer cylinder. The inner clamping blocks and outer clamping blocks correspond to each other and are evenly distributed along the circumference. Multiple telescopic through holes are provided on the side walls of both the fixed inner cylinder and the fixed outer cylinder. The inner clamping blocks and outer clamping blocks are slidably disposed in the corresponding telescopic through holes. An inner clamping driving mechanism is provided on the fixed inner cylinder, and an outer clamping driving mechanism is provided on the fixed outer cylinder, respectively used to drive the inner clamping blocks and outer clamping blocks to move. An open slide groove is provided on the test platform, and a sliding seat is slidably disposed inside. A fixed seat is provided at one end of the open slide groove. Two spring fixing mechanisms are provided, respectively installed on the sliding seat and the fixed seat.

[0007] Furthermore, the displacement driving mechanism includes a drive threaded rod and a servo motor for driving the drive threaded rod to rotate. The drive threaded rod is rotatably disposed in the open slide groove and is threadedly engaged with the sliding seat. The servo motor is fixed at one end of the open slide groove.

[0008] Furthermore, the inner clamping drive mechanism includes a bidirectional threaded rod and two sliding plates slidably disposed at both ends of the bidirectional threaded rod. Multiple connecting rods are hinged to the side of the sliding plates that are close to each other. The other end of the connecting rod is hinged to the inner clamping block. One end of the bidirectional threaded rod extends to the outside of the fixed inner cylinder and is connected to a rotating handle.

[0009] Furthermore, the external clamping drive mechanism includes a threaded sleeve, and one end of the threaded sleeve near the external clamping block is provided with a conical cavity, the outer wall of the external clamping block being in contact with the inner wall of the conical cavity.

[0010] Furthermore, grooves are provided on both ends of the outer clamping block, and springs are provided inside them. Support blocks are provided on the inner walls of the telescopic through holes corresponding to the outer clamping block, corresponding to the grooves. The two ends of the springs are respectively installed and connected to the end walls of the grooves and the support blocks.

[0011] Furthermore, both the sliding seat and the fixed seat are provided with a first pin hole, and the outer wall of the fixed outer cylinder is provided with an ear piece, which is provided with a second pin hole and a fixing pin. The spring fixing mechanism is fixed to the sliding seat or the fixed seat by the fixing pin cooperating with the second pin hole and the first pin hole.

[0012] The beneficial effects of this utility model are as follows: This utility model adopts a structure in which a fixed inner cylinder and a fixed outer cylinder are sleeved together through a spring fixing mechanism. The inner clamping block clamps the spring from the inside and the outer clamping block clamps it from the outside at the same time, which can effectively prevent the fixed part of the spring from deforming during the stretching process and causing loosening.

[0013] When clamping the spring, a balanced force can be applied to the spring from multiple directions, so that the force on the spring is at the axis, reducing the skew phenomenon during the spring stretching process and achieving good centering.

[0014] The spring fixing mechanism is fixed by engaging a fixing pin with a sliding seat or a pin hole on the fixing seat, which facilitates the operation of the spring fixing mechanism and makes it easy to fix the spring. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a spring tension detection device according to the present invention;

[0016] Figure 2 This is an exploded view of a spring tension detection device according to this utility model;

[0017] Figure 3This is an exploded view of the spring fixing mechanism in this utility model;

[0018] Figure 4 This is a schematic diagram of the longitudinal section of the spring fixing mechanism in this utility model.

[0019] 1. Test bench; 2. Displacement drive mechanism; 3. Spring fixing mechanism; 4. Fixed inner cylinder; 5. Fixed outer cylinder; 6. Inner clamping block; 7. Outer clamping block; 8. Telescopic through hole; 9. Inner clamping drive mechanism; 10. Outer clamping drive mechanism; 11. Opening slide groove; 12. Sliding seat; 13. Fixed seat; 14. Drive threaded rod; 15. Servo motor; 16. Bidirectional threaded rod; 17. Sliding plate; 18. Connecting rod; 19. Fixing pin; 20. Conical cavity; 21. Groove; 22. Spring; 23. Support block; 24. Rotating handle; 25. Pin hole one; 26. Ear piece; 27. Pin hole two. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0021] Embodiments of this utility model: such as Figure 1-4 As shown, a spring tension testing device includes a test platform 1, a displacement driving mechanism 2, and a spring fixing mechanism 3. The test platform 1 is provided with an open slide groove 11, and a sliding seat 12 is slidably provided inside. A fixed seat 13 is provided at one end of the open slide groove 11. There are two spring fixing mechanisms 3, which are respectively installed on the sliding seat 12 and the fixed seat 13. The displacement driving mechanism 2 drives the sliding seat 12 to move, thereby performing a tension test on the spring.

[0022] like Figure 2 As shown, the displacement driving mechanism 2 includes a drive threaded rod 14 and a servo motor 15 for driving the drive threaded rod 14 to rotate. The drive threaded rod 14 is rotatably disposed in the open slide groove 11 and is threadedly engaged with the sliding seat 12. The servo motor 15 is fixed at one end of the open slide groove 11, and its output shaft is connected to the drive threaded rod 14 to drive the sliding seat 12 to move within the open slide groove 11.

[0023] like Figure 3 , 4As shown, the specific structure of the spring fixing mechanism is as follows: The spring fixing mechanism 3 includes a fixed inner cylinder 4 and a fixed outer cylinder 5 sleeved together. The side walls of the fixed inner cylinder 4 and the fixed outer cylinder 5 are respectively provided with multiple inner clamping blocks 6 and multiple outer clamping blocks 7. The inner clamping blocks 6 and the outer clamping blocks 7 correspond to each other and are evenly distributed along the circumferential direction. The side walls of the fixed inner cylinder 4 and the fixed outer cylinder 5 are each provided with multiple telescopic through holes 8. The inner clamping blocks 6 and the outer clamping blocks 7 are respectively slidably arranged in the corresponding telescopic through holes 8. The fixed inner cylinder 4 is provided with an inner clamping drive mechanism 9, and the fixed outer cylinder 5 is provided with an outer clamping drive mechanism 10, which are used to drive the inner clamping blocks 6 and the outer clamping blocks 7 to move.

[0024] It is worth noting that anti-slip silicone pads can be installed on the side where the inner clamping block 6 and the outer clamping block 7 are close to each other, thereby increasing friction and improving the stability of clamping.

[0025] like Figure 3 As shown, the specific structure of the inner clamping drive mechanism is as follows: The inner clamping drive mechanism includes a bidirectional threaded rod 16 and two sliding pieces 17 slidably disposed at both ends of the bidirectional threaded rod 16. Multiple connecting rods 18 are hinged to the side of the sliding pieces 17 that are close to each other. The other end of the connecting rod 18 is hinged to the inner clamping block 6. One end of the bidirectional threaded rod 16 extends to the outside of the fixed inner cylinder 4 and is connected to a rotating handle 24. By rotating the handle 24, the bidirectional threaded rod 16 can be rotated, which drives the sliding pieces 17 to move closer or separate from each other, and pushes the inner clamping block 6 to extend or retract through the connecting rods 18.

[0026] like Figure 3 As shown, the specific structure of the external clamping drive mechanism is as follows: The external clamping drive mechanism 10 includes a threaded sleeve. A conical cavity 20 is provided at one end of the threaded sleeve near the external clamping block 7. The outer wall of the external clamping block 7 contacts the inner wall of the conical cavity 20. By rotating the threaded sleeve, the external clamping block 7 can be squeezed inward under the action of the conical cavity 20, achieving clamping. Grooves 21 are provided on both end walls of the external clamping block 7, and springs 22 are provided inside. A support block 23 is provided on the inner wall of the telescopic through hole 8 corresponding to the groove 21. The two ends of the spring 22 are respectively installed and connected to the end wall of the groove 21 and the support block 23. When the spring 22 is in a free state, the inner side of the external clamping block 7 is flush with the inner wall of the fixed outer cylinder 5. The spring 22 is designed so that the inner side of the external clamping block 7 is flush with the inner wall of the fixed outer cylinder 5 in the initial state, facilitating the insertion of the spring 22 between the inner and outer fixed sleeves.

[0027] The specific structure connecting the spring fixing mechanism with the fixed seat and the sliding seat is as follows: Both the sliding seat 12 and the fixed seat 13 are provided with pin holes 25. The outer wall of the fixed outer cylinder 5 is provided with lugs 26, each lug having a pin hole 27, and a fixing pin 19 is provided in cooperation with it. The spring fixing mechanism 3 is fixed to the sliding seat 12 or the fixed seat 13 through the cooperation of the fixing pin 19 with the pin hole 27 and the pin hole 25. It is worth noting that the top of the sliding seat 12 or the fixed seat 13 is provided with an arc-shaped groove corresponding to the fixed outer cylinder 5, and the fixed outer cylinder 5 is placed within the arc-shaped groove.

[0028] Working principle:

[0029] Before testing, the two ends of the spring to be tested are placed in the two spring fixing mechanisms 3 respectively. For fixing one end of the spring to be tested, the rotating handle 24 is turned to drive the bidirectional threaded rod 16 to rotate, so that the two sliding plates 17 are brought closer to each other. The connecting rod 18 pushes the inner clamping block 6 from the inside of the spring to be tested to move outward, so as to achieve clamping on the inside. At the same time, the threaded sleeve is rotated to move it closer to the outer clamping block 7. The inner wall of the conical cavity 20 is used to squeeze the outer clamping block 7, so that the outer clamping block 7 moves from the outside of the spring to be tested to the inside, and cooperates with the inner clamping block 6 to complete the firm clamping of the end of the spring to be tested. The servo motor 15 drives the drive threaded rod 14 to rotate, and the distance between the fixed seat 13 and the sliding seat 12 is adjusted to adapt to the initial length of the spring to be tested. The two spring fixing mechanisms 3 are installed on the sliding seat 12 and the fixed seat 13 by the fixing pin 19.

[0030] During testing, the servo motor 15 is activated, driving the threaded rod 14 to rotate, which in turn moves the sliding seat 12 away from the fixed seat 13, applying tension to the spring under test. During the stretching process, the inner clamping block 6 and the outer clamping block 7 apply balanced forces to the spring from multiple directions, ensuring that the spring is centered on its axis and reducing skewing. Using relevant measuring equipment (such as displacement sensors and tension sensors, not shown in the figure), the spring's displacement changes and the applied tension can be monitored in real time, thereby enabling the testing of the spring's maximum tensile force, elastic deformation range, and ultimate tensile length.

[0031] After the test is completed, turn off the servo motor 15, remove the fixing pin 19, and remove the tested spring. Rotate the threaded sleeve in the opposite direction, and the outer clamp 7 will reset under the action of the spring 22. Rotate the handle 24 in the opposite direction, and the inner clamp 6 will reset under the action of the connecting rod 18. Release the test spring and remove it from the spring fixing mechanism 3.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0034] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A spring tension testing device, comprising a test platform (1), a displacement driving mechanism (2), and a spring fixing mechanism (3), characterized in that: The spring fixing mechanism (3) includes a fixed inner cylinder (4) and a fixed outer cylinder (5) sleeved together. Multiple inner clamping blocks (6) and multiple outer clamping blocks (7) are respectively provided on the side walls of the fixed inner cylinder (4) and the fixed outer cylinder (5). The inner clamping blocks (6) and the outer clamping blocks (7) correspond to each other and are evenly distributed along the circumference. Multiple telescopic through holes (8) are provided on the side walls of both the fixed inner cylinder (4) and the fixed outer cylinder (5). The inner clamping blocks (6) and the outer clamping blocks (7) are slidably disposed in the corresponding telescopic through holes. In the hole (8), the fixed inner cylinder (4) is provided with an inner clamping drive mechanism (9), and the fixed outer cylinder (5) is provided with an outer clamping drive mechanism (10), which are used to drive the inner clamping block (6) and the outer clamping block (7) to move respectively; the test platform (1) is provided with an open slide groove (11), and a sliding seat (12) is slidably provided inside. A fixed seat (13) is provided at one end of the open slide groove (11). There are two spring fixing mechanisms (3), which are respectively installed on the sliding seat (12) and the fixed seat (13).

2. The spring tension detection device according to claim 1, characterized in that: The displacement driving mechanism (2) includes a drive threaded rod (14) and a servo motor (15) for driving the drive threaded rod (14) to rotate. The drive threaded rod (14) is rotatably disposed in the open slide groove (11) and threadedly engaged with the sliding seat (12). The servo motor (15) is fixed at one end of the open slide groove (11).

3. The spring tension detection device according to claim 1, characterized in that: The inner clamping drive mechanism includes a bidirectional threaded rod (16) and two sliding pieces (17) slidably disposed at both ends of the bidirectional threaded rod (16). Multiple connecting rods (18) are hinged to the side of the sliding pieces (17) that are close to each other. The other end of the connecting rod (18) is hinged to the inner clamping block (6). One end of the bidirectional threaded rod (16) extends to the outside of the fixed inner cylinder (4) and is connected to a rotating handle (24).

4. The spring tension detection device according to claim 1, characterized in that: The external clamping drive mechanism (10) includes a threaded sleeve, and a conical cavity (20) is provided at one end of the threaded sleeve near the external clamping block (7), and the outer wall of the external clamping block (7) contacts the inner wall of the conical cavity (20).

5. A spring tension detection device according to claim 4, characterized in that: The outer clamping block (7) has grooves (21) on both ends of its walls and a spring (22) inside. The inner wall of the telescopic through hole (8) corresponding to the outer clamping block (7) is provided with a support block (23) corresponding to the groove (21). The two ends of the spring (22) are respectively connected to the end wall of the groove (21) and the support block (23).

6. The spring tension detection device according to claim 1, characterized in that: The sliding seat (12) and the fixed seat (13) are both provided with a pin hole 1 (25). The outer wall of the fixed outer cylinder (5) is provided with an ear piece (26). The ear piece (26) is provided with a pin hole 2 (27) and a fixing pin (19) is provided in cooperation. The spring fixing mechanism (3) is fixed to the sliding seat (12) or the fixed seat (13) through the cooperation of the fixing pin (19) with the pin hole 2 (27) and the pin hole 1 (25).

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