Tension spring swing arm type wire tightener

Abstract

The tension spring swing arm type wire tightener comprises a guide wheel, a lever structure with one end connected with the guide wheel, a spring with one end connected with the other end of the lever structure and a fixing block connected with the other end of the spring, the lever structure is rotationally connected to a positioning plate, and a molybdenum wire penetrates through the guide wheel. The lever structure comprises a lever and a rotating shaft rotationally connected to the side portion of the lever, and the rotating shaft is rotationally connected to the positioning plate. According to the tension spring swing arm type wire tightener, the acting distance of the wire tightener can be increased, the service life of the wire tightener is prolonged through the lever structure, meanwhile, due to the fact that the lever structure and the spring are far away from the molybdenum wire, the wire tightener cannot be affected by tiny chippings of cut materials, and the tension spring swing arm type wire tightener has high stability and reliability.

Description

Technical Field

[0001] The utility model belongs to the technical field of wire tighteners, and in particular relates to a tension spring swing arm type wire tightener. Background Art

[0002] The principle of wire cutting machine is to use a thin metal wire to reciprocate under the drag of the motor. The material of this metal wire is generally molybdenum, hereinafter referred to as molybdenum wire. The metal material to be processed is referred to as the workpiece. In actual processing, the molybdenum wire and the workpiece are connected to the positive and negative poles of the power supply respectively, and the molybdenum wire moves at high speed under the drive of the motor; when the distance between the molybdenum wire and the workpiece is close enough, spark discharge will be generated, and the workpiece will be ablated under the action of the electric spark, thus forming a cutting process. Therefore, the full name of the wire cutting machine is "fast wire EDM wire cutting machine".

[0003] The implementation carrier of wire cutting processing technology is wire cutting machine, and the main component that affects the cutting quality of wire cutting machine is wire cutting wire. Among them, the tightness of wire cutting wire is an important parameter that affects the surface quality of processed parts. Wire cutting machine can only work normally when the wire cutting wire is tensioned. During cutting, the wire cutting wire will become thinner and longer due to electro-erosion, making the wire cutting wire loose and shaking, resulting in a decrease in the quality of the processed surface and an increase in roughness. In addition, the wire cutting wire will overlap on the wire storage drum due to wire shaking, making the wire feeding unstable and causing wire breakage and other problems, reducing processing efficiency.

[0004] In order to solve the problem of loose wire cutting, wire cutting machines in the prior art are equipped with wire tensioners. Commonly used wire tensioners include spring-type wire tensioners, but the elastic force of the spring changes dynamically, and the force of the spring at each position point is different. In actual application, as the molybdenum wire becomes longer, the spring is slowly released, but the elastic force is gradually weakened; after the molybdenum wire is loose to a certain extent, it is almost ineffective because it is impossible to maintain the tension to fix the molybdenum wire, so the wire tensioner has a short range of action and a short service life. In addition, the dust and oil pollution in the working environment of the wire cutting machine are extremely serious. During the cutting process, special oil needs to be sprayed for cooling. In addition, the small debris of the cut material splashes, which can easily cause the moving parts to jam or get stuck. Therefore, the stability or reliability is extremely poor, and dust and oil pollution need to be frequently cleaned, otherwise the wire tensioner will fail completely.

[0005] This solution proposes a tension spring swing arm type wire tightener, which is used to solve the above-mentioned technical problems at the same time. Utility Model Content

[0006] The purpose of the utility model is to provide a tension spring swing arm type wire tensioner, which solves the technical problem of how to increase the action distance of the wire tensioner. Through the lever structure, the service life of the wire tensioner is increased. At the same time, because the lever structure and the spring are far away from the molybdenum wire, the small debris of the cutting material will not affect the wire tensioner, and it has high stability and reliability.

[0007] A tension spring swing arm type wire tightener comprises a guide wheel, a lever structure connected to the guide wheel at one end, a spring connected to the other end of the lever structure at one end, and a fixed block connected to the other end of the spring. The lever structure is rotatably connected to a positioning plate, and a molybdenum wire is passed through the guide wheel.

[0008] The lever structure comprises a lever and a rotation shaft rotatably connected to a side portion of the lever, and the rotation shaft is rotatably connected to the positioning plate.

[0009] The lever structure comprises a connecting rod part 1 coaxially connected to the guide wheel at one end, a fixing spring connected to the other end of the connecting rod part 1 at one end, a connecting rod part 2 connected to the other end of the fixing spring at one end, and the other end of the connecting rod part 2 is connected to the spring;

[0010] A rotating shaft is disposed on the side of the second connecting rod portion, and the rotating shaft is rotatably connected to the positioning plate.

[0011] The lever structure is coaxially hingedly connected to the guide wheel.

[0012] The distance from the center of the rotating shaft to one end of the spring is smaller than the distance from the center of the rotating shaft to the center of the guide wheel.

[0013] The distance from the center of the rotating shaft to one end of the spring is 1 / 4 of the distance from the center of the rotating shaft to the center of the guide wheel.

[0014] The wire tighteners are provided in plurality and are distributed at different positions of the molybdenum wire.

[0015] The positive effects of the utility model are as follows:

[0016] (1) The lever principle is used to enlarge the extension and contraction range of the spring. The core is to use a very small section of the spring's elastic force range, and then use the lever principle to enlarge the travel range to make it consistent with the distance required to tighten the molybdenum wire, basically satisfying the tension of the entire available travel.

[0017] (2) Simplify moving parts, completely eliminate the adverse effects of oil, dust, and metal particles on the thread tightener, and completely eliminate jamming and jamming.

[0018] (3) The fixed point of the lever is a rotatable support point of the bearing structure, without bearings. It is simple, stable and reliable, dust-proof and oil-proof, and durable.

[0019] (4) Completely maintenance-free, no need to frequently clean oil and dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the wire tightener in Example 1 of the utility model.

[0021] Figure 2 This is a schematic diagram of the structure of the wire tightener in Example 2 of the utility model.

[0022] Figure 3 This is a schematic diagram of the installation structure of the wire tightener in Example 1 of the utility model.

[0023] Figure 4 This is a schematic diagram of the installation structure of the wire tightener in Example 2 of the utility model.

[0024] Among them, the figure markings are: 1. positioning plate; 3. molybdenum wire; 4. guide wheel; 5. lever structure; 51. connecting rod part one; 52. fixing spring; 53. connecting rod part two; 6. rotating shaft; 7. spring; 8. fixing block; 9. power shaft. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0026] Example 1

[0027] See also Figure 1 and Figure 3 A tension spring swing arm type wire tightener includes a guide wheel 4, a lever structure 5 connected to the guide wheel 4 at one end, a spring 7 connected to the other end of the lever structure 5 at one end, and a fixed block 8 connected to the other end of the spring 7. The lever structure 5 is rotatably connected to the positioning plate 1, and a molybdenum wire 3 is passed through the guide wheel 4.

[0028] The lever structure 5 includes a lever and a rotation shaft 6 rotatably connected to a side portion of the lever. The rotation shaft 6 is rotatably connected to the positioning plate 1 .

[0029] The lever structure 5 is coaxially hingedly connected to the guide wheel 4 .

[0030] The distance from the center of the rotating shaft 6 to one end of the spring 7 is smaller than the distance from the center of the rotating shaft 6 to the center of the guide wheel 4 .

[0031] The distance from the center of the rotating shaft 6 to one end of the spring 7 is 1 / 4 of the distance from the center of the rotating shaft 6 to the center of the guide wheel 4.

[0032] The wire tighteners are provided in plurality and are distributed at different positions of the molybdenum wire 3 .

[0033] The specific working process of this utility model:

[0034] When the molybdenum wire 3 begins to adjust and work under the drive of the power shaft 9, the spring 7 is in a tensioned state, and the lever also rotates a certain angle. As time goes on, when the molybdenum wire 3 begins to loosen, the lever rotates. Since the rotating shaft 6 is far away from the guide wheel 4, the end of the lever connected to the guide wheel 4 rotates a larger angle, and the other end of the lever connected to the spring 7 will rotate a very small angle. In this way, the degree of shortening of the spring 7 will be very small, which increases the effective distance of the tensioner. Through the lever structure 5, the use time of the tensioner is increased.

[0035] Example 2

[0036] Based on Example 1, another example of the present application is introduced.

[0037] See also Figure 2 and Figure 4 The lever structure 5 includes a connecting rod 51 having one end coaxially connected to the guide wheel 4, a fixing spring 52 having one end connected to the other end of the connecting rod 51, a connecting rod 53 having one end connected to the other end of the fixing spring 52, and the other end of the connecting rod 53 is connected to the spring 7;

[0038] A rotating shaft 6 is provided on the side of the second connecting rod portion 53 , and the rotating shaft 6 is rotatably connected to the positioning plate 1 .

[0039] The fixing spring 52 is added so that a certain bending angle exists between the connecting rod part 1 and the connecting rod part 2. When the spring 7 is completely reset, the fixing spring 52 is in a bent state, which indirectly prolongs the service life of the tightener.

[0040] Technical features not described in the present invention can be achieved through or by adopting existing technologies, and will not be elaborated here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A tension spring swing arm type wire tightener, characterized in that: The invention comprises a guide wheel (4), a lever structure (5) having one end connected to the guide wheel (4), a spring (7) having one end connected to the other end of the lever structure (5), and a fixing block connected to the other end of the spring (7); the lever structure (5) is rotatably connected to a positioning plate (1); and a molybdenum wire (3) is passed through the guide wheel (4).

2. A tension spring swing arm type wire tightener according to claim 1, characterized in that: The lever structure (5) comprises a lever and a rotation shaft (6) rotatably connected to a side portion of the lever, wherein the rotation shaft (6) is rotatably connected to the positioning plate (1).

3. A tension spring swing arm type wire tightener according to claim 1, characterized in that: The lever structure (5) comprises a connecting rod portion 1 (51) having one end coaxially connected to the guide wheel (4), a fixing spring (52) having one end connected to the other end of the connecting rod portion 1 (51), and a connecting rod portion 2 (53) having one end connected to the other end of the fixing spring (52), and the other end of the connecting rod portion 2 (53) is connected to the spring (7); A rotating shaft (6) is provided on the side of the second connecting rod portion (53), and the rotating shaft (6) is rotatably connected to the positioning plate (1).

4. A tension spring swing arm type wire tightener according to any one of claims 2-3, characterized in that: The lever structure (5) is coaxially hingedly connected to the guide wheel (4).

5. A tension spring swing arm type wire tightener according to any one of claims 2-3, characterized in that: The distance from the center of the rotating shaft (6) to one end of the spring (7) is smaller than the distance from the center of the rotating shaft (6) to the center of the guide wheel (4).

6. A tension spring swing arm type wire tightener according to claim 5, characterized in that: The distance from the center of the rotating shaft (6) to one end of the spring (7) is 1 / 4 of the distance from the center of the rotating shaft (6) to the center of the guide wheel (4).

7. The tension spring swing arm type wire tightener according to claim 1, characterized in that: The wire tighteners are provided in plurality and are distributed at different positions of the molybdenum wire (3).

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