Constant-temperature spring testing machine for heart stent

Abstract

The utility model relates to the technical field of spring testing devices, and discloses a constant temperature spring testing machine for a heart stent, which comprises a box body and a box cover, the box cover is arranged above the box body, the side surface of the box body is provided with an opening and closing assembly, and the opening and closing assembly is used for adjusting the position of the box cover; a connecting shaft is arranged on the lower end face of the box cover, a positioning assembly is arranged at the lower end of the connecting shaft, and the positioning assembly is used for fixing one end of the constant-temperature spring; a rotating shaft is rotationally connected to one side of the connecting shaft on the box cover, a penetrating-out ring is arranged at the lower end of the rotating shaft, a driving assembly is arranged on the upper end face of the box cover, and the driving assembly drives the rotating shaft to rotate in a reciprocating mode; an electric heating rod is arranged at the lower end in the box body, an air pump is arranged on the upper end face of the box cover, and the air pump is communicated with the space in the box body. The device has the advantage that the performance of the constant-temperature spring can be comprehensively detected.

Description

Technical Field

[0001] The utility model relates to the technical field of spring testing devices, in particular to a constant temperature spring testing machine for a heart stent. Background Art

[0002] Heart stents, also known as coronary artery stents, are commonly used medical devices in cardiac interventional surgery and have the function of clearing arterial blood vessels. The main materials are stainless steel, nickel-titanium alloy or cobalt-chromium alloy. They first appeared in the 1980s and have gone through the development process of metal stents, drug-coated stents, and bioresorbable stents.

[0003] The thermostatic spring is the core component of the heart stent. The performance of the thermostatic spring directly affects the service life of the heart stent. Therefore, during the production process of the heart stent, the performance of the thermostatic spring needs to be tested. Therefore, a thermostatic spring testing machine is urgently needed to conduct a comprehensive test of its performance. Utility Model Content

[0004] 1. Technical Problems Solved

[0005] The technical problem to be solved by the utility model is that there is currently a lack of a device that can comprehensively detect the performance of a constant temperature spring.

[0006] 2. Technical Solution

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a constant temperature spring testing machine for a heart stent, comprising a box body and a box cover, wherein the box body is provided with a box cover.

[0008] An opening and closing assembly is provided on the side of the box body, and the opening and closing assembly adjusts the position of the box cover;

[0009] The lower end surface of the box cover is provided with a connecting shaft, and the lower end of the connecting shaft is provided with a positioning assembly, and the positioning assembly fixes one end of the constant temperature spring;

[0010] A rotating shaft is rotatably connected to one side of the connecting shaft on the box cover, a through ring is provided at the lower end of the rotating shaft, and a driving component is provided on the upper end surface of the box cover, and the driving component drives the rotating shaft to reciprocate;

[0011] An electric heating rod is arranged at the lower end of the box body, an air pump is arranged on the upper end surface of the box cover, and the air pump is communicated with the space inside the box body.

[0012] Furthermore, the driving assembly includes a motor, a cam and a spring. A gear is provided on the portion of the upper end of the rotating shaft exposed from the box cover, a rack meshing with the gear is provided on one side of the gear, a transmission plate is provided at one end of the rack, a motor is provided on the upper end surface of the box cover, a cam is provided on the output end of the motor, the cam is fitted with the transmission plate, a connecting plate is provided on the side of the rack away from the transmission plate, and a spring is provided between the connecting plate and the rack.

[0013] Furthermore, a guide rod is provided on a surface of the connecting plate facing the rack, the rack is slidably connected to the guide rod, and the spring is set on the outside of the guide rod.

[0014] Furthermore, the positioning assembly includes a connecting block and a tightening block, the connecting block is connected to the connecting shaft, a groove is provided on the side of the connecting block facing the through-ring, a limiting rod is provided in the groove, two tightening blocks are slidably connected in the groove, the tightening block is slidably connected to the limiting rod, and a spring 2 is provided between the tightening blocks.

[0015] Furthermore, the second set of springs is arranged outside the limiting rod.

[0016] Furthermore, the opening and closing assembly includes a folding plate and a cylinder, the cylinder is connected to the box body through the folding plate, and the piston rod of the cylinder is connected to the box cover.

[0017] 3. Beneficial Effects

[0018] The advantages of the utility model compared with the prior art are:

[0019] Liquid is injected into the box and its temperature is controlled by an electric heating rod. The thermostatic spring passes through the penetration ring and is fixed on the positioning component. The opening and closing component drives the thermostatic spring to immerse in the liquid in the box. The air pump is activated to adjust the pressure in the box. The driving component drives the shaft to rotate back and forth, thereby driving the thermostatic spring to swing, simulating the repeated bending of the thermostatic spring in a similar environment, so as to accurately obtain the performance of the thermostatic spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0021] Figure 2 The structure of the utility model is shown in FIG. Figure 2 ;

[0022] Figure 3 It is a structural schematic diagram of the drive assembly of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the positioning component of the utility model.

[0024] Figure numerals: 1, box body, 2, box cover, 3, connecting shaft, 4, rotating shaft, 5, penetration ring, 6, air pump, 7, motor, 8, cam, 9, spring one, 10, gear, 11, rack, 12, transmission plate, 13, cylinder, 14, guide rod, 15, connecting block, 16, expansion block, 17, limit rod, 18, spring two, 19, folding plate. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0026] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the utility model are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0029] The utility model will now be further described in conjunction with the accompanying drawings.

[0030] Embodiment 1

[0031] Combined with Figure 1 and 4The lower end surface of the box cover 2 is provided with a connecting shaft 3, and the lower end of the connecting shaft 3 is provided with a positioning assembly, and the positioning assembly fixes one end of the constant temperature spring; a rotating shaft 4 is rotatably connected to one side of the connecting shaft 3 on the box cover 2, and a penetration ring 5 is provided at the lower end of the rotating shaft 4. The positioning assembly includes a connecting block 15 and a tightening block 16. The connecting block 15 is connected to the connecting shaft 3, and a groove is provided on the side of the connecting block 15 facing the penetration ring 5. A limiting rod 17 is provided in the groove, and two tightening blocks 16 are slidably connected in the groove. The tightening block 16 is slidably connected to the limiting rod 17, and a spring 2 18 is provided between the tightening blocks 16, and the spring 2 18 is sleeved on the outside of the limiting rod 17.

[0032] When in use, the constant temperature spring is passed through the penetration ring 5, and one end of the constant temperature spring is sleeved on the outside of the tightening block 16. Under the action of the spring 18, the tightening block 16 is tightened and positioned inside one end of the constant temperature spring. During the expansion and contraction of the spring 18, the limit rod 17 guides the expansion and contraction direction of the spring 18.

[0033] Combined with Figure 1-2 The side of the box body 1 is provided with an opening and closing assembly, which adjusts the position of the box cover 2. The lower end of the box body 1 is provided with an electric heating rod, and the upper end surface of the box cover 2 is provided with an air pump 6, which is connected to the space inside the box body 1.

[0034] After positioning is completed, the opening and closing assembly covers the box cover 2 on the box body 1 to seal the box body 1. At this time, the fixed constant temperature spring is immersed in the liquid in the box body 1, the electric heating rod adjusts the temperature of the liquid, and the air pump 6 adjusts the pressure in the box body 1 to simulate the use environment of the constant temperature spring.

[0035] Combined with Figure 1-3 A driving assembly is provided on the upper end surface of the box cover 2, and the driving assembly drives the rotating shaft 4 to rotate reciprocatingly; the driving assembly includes a motor 7, a cam 8 and a spring 9. A gear 10 is provided on the portion of the upper end of the rotating shaft 4 exposed from the box cover 2, and a rack 11 meshing with the gear 10 is provided on one side of the gear 10, and a transmission plate 12 is provided on one end of the rack 11. A motor 7 is provided on the upper end surface of the box cover 2, and a cam 8 is provided on the output end of the motor 7, and the cam 8 is fitted with the transmission plate 12. A connecting plate is provided on the side of the rack 11 away from the transmission plate 12, and a spring 9 is provided between the connecting plate and the rack 11. A guide rod 14 is provided on the side of the connecting plate facing the rack 11, and the rack 11 is slidably connected to the guide rod 14, and the spring 9 is sleeved on the outside of the guide rod 14.

[0036] The motor 7 rotates, driving the cam 8 to rotate. The cam 8 drives the rack 11 to reciprocate through the transmission plate 12 and the spring 9. The rack 11 drives the gear 10 meshing with it to reciprocate. The gear 10 drives the penetrating ring 5 to swing back and forth through the rotating shaft 4, thereby realizing the reciprocating bending of the thermostatic spring after positioning, so as to conduct a comprehensive and reliable test on the performance of the thermostatic spring. The guide rod 14 not only guides the movement direction of the rack 11, but also guides the expansion and contraction direction of the spring 9.

[0037] Embodiment 2

[0038] Combined with Figure 1-2 The opening and closing assembly includes a folding plate 19 and a cylinder 13 . The cylinder 13 is connected to the box body 1 through the folding plate 19 , and the piston rod of the cylinder 13 is connected to the box cover 2 .

[0039] On the basis of the first embodiment, the piston rod of the cylinder 13 is extended and retracted to drive the box cover 2 to move up and down, thereby realizing the opening and closing of the box cover 2.

[0040] The utility model and its implementation methods are described, and such description is not restrictive. The drawings are only one of the implementation methods of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it, without departing from the purpose of the invention of the utility model, they can design a structure and implementation method similar to the technical solution without creativity, which should belong to the protection scope of the utility model.

Claims

1. A constant temperature spring testing machine for a heart stent, comprising a box body (1) and a box cover (2), wherein the box body (1) is provided with a box cover (2), characterized in that: An opening and closing assembly is provided on the side of the box body (1), and the opening and closing assembly is used to adjust the position of the box cover (2); The lower end surface of the box cover (2) is provided with a connecting shaft (3), and the lower end of the connecting shaft (3) is provided with a positioning component, and the positioning component fixes one end of the constant temperature spring; A rotating shaft (4) is rotatably connected to one side of the connecting shaft (3) on the box cover (2), a through ring (5) is provided at the lower end of the rotating shaft (4), and a driving component is provided on the upper end surface of the box cover (2), and the driving component drives the rotating shaft (4) to reciprocate; An electric heating rod is provided at the lower end of the box body (1), and an air pump (6) is provided on the upper end surface of the box cover (2), and the air pump (6) is communicated with the space inside the box body (1).

2. A constant temperature spring testing machine for a heart stent according to claim 1, characterized in that: The driving assembly comprises a motor (7), a cam (8) and a spring (9); a gear (10) is provided on the portion of the upper end of the rotating shaft (4) exposed from the box cover (2); a rack (11) meshing with the gear (10) is provided on one side of the gear (10); a transmission plate (12) is provided on one end of the rack (11); a motor (7) is provided on the upper end surface of the box cover (2); a cam (8) is provided on the output end of the motor (7); the cam (8) is fitted with the transmission plate (12); a connecting plate is provided on the side of the rack (11) away from the transmission plate (12); a spring (9) is provided between the connecting plate and the rack (11).

3. A constant temperature spring testing machine for a heart stent according to claim 2, characterized in that: A guide rod (14) is provided on one surface of the connecting plate facing the rack (11); the rack (11) is slidably connected to the guide rod (14); and the spring (9) is sleeved on the outside of the guide rod (14).

4. The constant temperature spring testing machine for a heart stent according to claim 1, characterized in that: The positioning assembly comprises a connecting block (15) and a tightening block (16); the connecting block (15) is connected to the connecting shaft (3); a groove is provided on a surface of the connecting block (15) facing the through-ring (5); a limiting rod (17) is provided in the groove; two tightening blocks (16) are slidably connected in the groove; the tightening blocks (16) are slidably connected to the limiting rod (17); and a spring (18) is provided between the tightening blocks (16).

5. A constant temperature spring testing machine for a heart stent according to claim 4, characterized in that: The second spring (18) is sleeved on the outside of the limiting rod (17).

6. The constant temperature spring testing machine for a heart stent according to claim 1, characterized in that: The opening and closing assembly comprises a folding plate (19) and a cylinder (13); the cylinder (13) is connected to the box body (1) via the folding plate (19); and the piston rod of the cylinder (13) is connected to the box cover (2).

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