阅读说明：本技术 高强度复合弹簧及其制造方法 (High-strength composite spring and manufacturing method thereof ) 是由 陈颐 于 2020-06-30 设计创作，主要内容包括：本发明提供了一种高强度复合弹簧及其制造方法,高强度复合弹簧包括内弹簧、外弹簧及若干连接杆。内弹簧与外弹簧的螺距及圈数相同,内弹簧朝开设有若干第一限位槽,外弹簧朝开设有若干第二限位槽。每一连接杆的一端插设于一第一限位槽中,每一连接杆的另一端插设于一第二限位槽中。内弹簧与外弹簧焊接。其制造方法步骤如下：利用弹簧钢分别制成内弹簧及外弹簧,利用钻孔机对内弹簧进行钻孔作业,以形成若干第一限位槽。利用钻孔机对外弹簧进行钻孔作业,以形成若干第二限位槽。将内弹簧穿设于外弹簧中。将各连接杆分别插设入一第一限位槽以及一第二限位槽中。将内弹簧与外弹簧焊接。上述高强度复合弹簧提升了弹性作用力,增强了结构强度。(The invention provides a high-strength composite spring and a manufacturing method thereof. The pitch and the number of turns of the inner spring are the same as those of the outer spring, the inner spring is provided with a plurality of first limiting grooves, and the outer spring is provided with a plurality of second limiting grooves. One end of each connecting rod is inserted into a first limiting groove, and the other end of each connecting rod is inserted into a second limiting groove. The inner spring is welded with the outer spring. The manufacturing method comprises the following steps: the inner spring and the outer spring are respectively made of spring steel, and the inner spring is drilled by a drilling machine to form a plurality of first limiting grooves. And drilling the outer spring by using a drilling machine to form a plurality of second limiting grooves. The inner spring is arranged in the outer spring in a penetrating way. The connecting rods are respectively inserted into a first limiting groove and a second limiting groove. And welding the inner spring and the outer spring. The high-strength composite spring improves the elastic acting force and enhances the structural strength.)

1. A high strength composite spring, comprising: the inner spring, the outer spring and a plurality of connecting rods; the inner spring is accommodated in the outer spring, the pitch and the number of turns of the inner spring are the same as those of the outer spring, one side of the inner spring, which faces the outer spring, is provided with a plurality of first limiting grooves, one side of the outer spring, which faces the inner spring, is provided with a plurality of second limiting grooves, and each first limiting groove faces one second limiting groove; one end of each connecting rod is inserted into one first limiting groove, and the other end of each connecting rod is inserted into one second limiting groove; one end of each connecting rod is abutted against the inner spring, and the other end of each connecting rod is abutted against the outer spring; all the connecting rods are parallel; the top end of the inner spring is welded with the top end of the outer spring, and the bottom end of the inner spring is welded with the bottom end of the outer spring.

2. The high-strength composite spring according to claim 1, further comprising two connecting members, wherein the connecting members are U-shaped, and positioning blocks are disposed at two ends of the connecting members; the top end and the bottom end of the inner spring are provided with first positioning grooves, and the top end and the bottom end of the outer spring are provided with second positioning grooves; two positioning blocks of the connecting piece are respectively inserted into the first positioning groove at the top end of the inner spring and the second positioning groove at the top end of the outer spring; two positioning blocks of the other connecting piece are respectively inserted into the first positioning groove at the bottom end of the inner spring and the second positioning groove at the bottom end of the outer spring; and each connecting piece is respectively welded with the inner spring and the outer spring.

3. The high-strength composite spring as claimed in claim 2, wherein the positioning block is a cylinder, the first positioning groove and the second positioning groove are circular grooves, and the positioning block is respectively fitted with the first positioning groove and the second positioning groove.

4. The high strength compound spring as claimed in claim 1, wherein the connecting rod has a cylindrical rod-shaped structure.

5. The high-strength compound spring as claimed in claim 4, wherein the first limiting groove is a circular groove, and the first limiting groove is adapted to the connecting rod.

6. The high-strength compound spring as claimed in claim 5, wherein the second limiting groove is a circular groove, and the second limiting groove is adapted to the connecting rod.

7. A method for manufacturing a high-strength composite spring according to claim 1, comprising the steps of:

the method comprises the following steps: the inner spring and the outer spring are respectively made of spring steel, and the outer side of the inner spring is drilled by a drilling machine to form a plurality of first limiting grooves; drilling the inner side of the outer spring by using a drilling machine to form a plurality of second limiting grooves;

step two: the inner spring is arranged in the outer spring in a penetrating way;

step three: inserting two ends of each connecting rod into the first limiting groove of the inner spring and the second limiting groove of the outer spring respectively;

step four: and welding the top end of the inner spring and the top end of the outer spring, and welding the bottom end of the inner spring and the bottom end of the outer spring, so that the high-strength composite spring is formed.

8. The method as claimed in claim 7, wherein the inner spring and the outer spring are made of alloy spring steel in the first step.

9. The method as claimed in claim 7, wherein the inner spring and the outer spring are made of carbon spring steel in the first step.

10. The method of manufacturing a high strength compound spring according to claim 7, wherein the connecting rod is made of cemented carbide.

Technical Field

The invention relates to the technical field of springs, in particular to a high-strength composite spring and a manufacturing method thereof.

Background

A spring is a mechanical part that works by elasticity. The spring can be deformed under the action of external force, and can be restored to the original shape after the external force is removed. The spring is typically made of spring steel. The types of springs are complex and various, and the springs can be divided into extension springs, compression springs, torsion springs, bending springs and the like according to the stress property. The compression spring is a helical spring bearing axial pressure. Compression springs are generally divided into equal-pitch springs and variable-pitch springs, and the shapes of the compression springs are as follows: the compression spring is cylindrical, conical, convex and concave, and a small number of non-circular shapes, and the like, a certain gap is reserved between the rings of the compression spring, and the compression spring contracts and deforms when subjected to external load, so that deformation energy is stored.

However, the elastic force of the present compression spring is difficult to be further increased when the width and length of the compression spring are limited, so that the specific requirements of the user cannot be met. In addition, when the compression spring is impacted by a foreign object, the structural form of the compression spring is easy to change, the structural strength is insufficient, and the structural stability is low.

Disclosure of Invention

In view of the above, it is necessary to provide a high-strength composite spring and a method for manufacturing the same, which are directed to the technical problem of insufficient elastic force and structural strength.

A high strength compound spring, comprising: inner spring, outer spring and a plurality of connecting rods. The inner spring is contained in the outer spring, the pitch and the number of turns of the inner spring are the same as those of the outer spring, a plurality of first limiting grooves are formed in one side, facing the outer spring, of the inner spring, a plurality of second limiting grooves are formed in one side, facing the inner spring, of the outer spring, and each first limiting groove faces one second limiting groove. One end of each connecting rod is inserted into one first limiting groove, and the other end of each connecting rod is inserted into one second limiting groove. One end of each connecting rod is abutted against the inner spring, and the other end of each connecting rod is abutted against the outer spring. The connecting rods are parallel. The top end of the inner spring is welded with the top end of the outer spring, and the bottom end of the inner spring is welded with the bottom end of the outer spring.

In one embodiment, the high-strength composite spring further comprises two connecting pieces, wherein each connecting piece is of a U-shaped structure, and positioning blocks are arranged at two ends of each connecting piece. The top end and the bottom end of the inner spring are provided with first positioning grooves, and the top end and the bottom end of the outer spring are provided with second positioning grooves. And the two positioning blocks of the connecting piece are respectively inserted into the first positioning groove at the top end of the inner spring and the second positioning groove at the top end of the outer spring. And the two positioning blocks of the other connecting piece are respectively inserted into the first positioning groove at the bottom end of the inner spring and the second positioning groove at the bottom end of the outer spring. And each connecting piece is respectively welded with the inner spring and the outer spring.

In one embodiment, the positioning block is a cylinder, the first positioning groove and the second positioning groove are circular grooves, and the positioning block is respectively matched with the first positioning groove and the second positioning groove.

In one embodiment, the connecting rod is a cylindrical rod-shaped structure.

In one embodiment, the first limiting groove is a circular groove, and the first limiting groove is matched with the connecting rod.

In one embodiment, the second limiting groove is a circular groove, and the second limiting groove is matched with the connecting rod.

Another object of the present invention is to provide a method for manufacturing the high-strength composite spring, which is achieved by the following technical solutions:

a manufacturing method of a high-strength composite spring comprises the following steps:

the method comprises the following steps: the inner spring and the outer spring are respectively made of spring steel, and the outer side of the inner spring is drilled by a drilling machine to form a plurality of first limiting grooves. And drilling the inner side of the outer spring by using a drilling machine to form a plurality of second limiting grooves.

Step two: and penetrating the inner spring into the outer spring.

Step three: inserting two ends of each connecting rod into the first limiting groove of the inner spring and the second limiting groove of the outer spring respectively.

Step four: and welding the top end of the inner spring and the top end of the outer spring, and welding the bottom end of the inner spring and the bottom end of the outer spring, so that the high-strength composite spring is formed.

In one embodiment, in the first step, the inner spring and the outer spring are both made of alloy spring steel.

In one embodiment, in the first step, the inner spring and the outer spring are both made of carbon spring steel.

In one embodiment, the connecting rod is made of cemented carbide.

Above-mentioned high strength composite spring is connected inner spring and outer spring through a plurality of connecting rods to utilize each connecting rod to ensure the stability of the relative position of inner spring and outer spring. Axial elastic acting force is enhanced through the inner spring and the outer spring, and the side impact resistance of the outer spring is enhanced through the supporting effect of each connecting rod and the inner spring, so that the structural stability is enhanced. This high strength composite spring has promoted the elastic force, has strengthened structural strength.

Drawings

FIG. 1 is a schematic diagram of a high strength compound spring according to one embodiment;

fig. 2 is a schematic diagram of a disassembled high-strength compound spring in one embodiment.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 and 2 together, the present invention provides a high strength composite spring 10, wherein the high strength composite spring 10 includes: an inner spring 100, an outer spring 200, and a plurality of connecting rods 300. The inner spring 100 is accommodated in the outer spring 200, the pitch and the number of turns of the inner spring 100 are the same as those of the outer spring 200, one side of the inner spring 100 facing the outer spring 200 is provided with a plurality of first limiting grooves 110, one side of the outer spring 200 facing the inner spring 100 is provided with a plurality of second limiting grooves 210, and each first limiting groove 110 faces one second limiting groove 210. One end of each connecting rod 300 is inserted into a first limiting groove 110, and the other end of each connecting rod 300 is inserted into a second limiting groove 210. One end of each link 300 abuts against the inner spring 100, and the other end of each link 300 abuts against the outer spring 200. The connecting rods 300 are parallel. The top end of the inner spring 100 is welded to the top end of the outer spring 200, and the bottom end of the inner spring 100 is welded to the bottom end of the outer spring 200.

The high-strength compound spring 10 is configured such that the inner spring 100 and the outer spring 200 are connected by the plurality of connecting rods 300, and the stability of the relative positions of the inner spring 100 and the outer spring 200 is ensured by the connecting rods 300. The axial elastic acting force is enhanced through the inner spring 100 and the outer spring 200, and the side impact resistance of the outer spring 200 is enhanced through the supporting action of each connecting rod 300 and the inner spring 100, so that the structural stability is enhanced. The high-strength composite spring 10 improves the elastic acting force and enhances the structural strength.

The inner spring 100 is located at the central region of the high strength compound spring, and the outer spring 200 is located at the outer region of the high strength compound spring. The inner spring 100 is inserted into the outer spring 200, and the outer spring 200 is disposed around the inner spring 100, and the inner spring 100 and the outer spring 200 together enhance the elastic force in the axial direction.

The connection rod 300 serves to connect the inner spring 100 and the outer spring 200, thereby securing stability of the relative positions of the inner spring 100 and the outer spring 200. The side impact resistance of the outer spring 200 is enhanced by the supporting action of the connecting rods 300 and the inner spring 100, and the structural stability of the high-strength composite spring is further enhanced.

In one embodiment, the connecting rod 300 is a cylindrical rod-shaped structure. The connecting rods 300 are parallel so that the inner spring 100 can directly receive the impact of the outer spring 200. Specifically, the pitch and the number of turns of the inner spring 100 are set to be the same as those of the outer spring 200, so that when the two ends of each connecting rod 300 are connected to the inner spring 100 and the outer spring 200, respectively, the planes of the connecting rods 300 are parallel.

The first limiting groove 110 is used for fixing one end of the connecting rod 300, and the second limiting groove 210 is used for fixing the other end of the connecting rod 300. In this embodiment, the first limiting groove 110 is a circular groove, and the first limiting groove 110 is adapted to the connecting rod 300. Further, the second limiting groove 210 is a circular groove, and the second limiting groove 210 is adapted to the connecting rod 300. Thus, under the limiting action of the first limiting groove 110 and the second limiting groove 210, each connecting rod 300 is firmly abutted against the inner spring 100 and the outer spring 200, respectively. Thus, the structural stability of the high-strength composite spring is ensured.

In order to improve the welding stability of the inner spring 100 and the outer spring 200, in one embodiment, the high-strength composite spring further includes two connecting members 400, the connecting members 400 are U-shaped, and positioning blocks 410 are disposed at two ends of the connecting members 400. The inner spring 100 has first positioning grooves 120 formed at top and bottom ends thereof, and the outer spring 200 has second positioning grooves 220 formed at top and bottom ends thereof. Two positioning blocks 410 of a connecting member 400 are respectively inserted into the first positioning groove 120 at the top end of the inner spring 100 and the second positioning groove 220 at the top end of the outer spring 200. The two positioning blocks 410 of the other connecting member 400 are respectively inserted into the first positioning groove 120 at the bottom end of the inner spring 100 and the second positioning groove 220 at the bottom end of the outer spring 200. Each of the connectors 400 is welded to the inner spring 100 and the outer spring 200, respectively. Further, the positioning block 410 is a cylinder structure, the first positioning groove 120 and the second positioning groove 220 are circular grooves, and the positioning block 410 is respectively matched with the first positioning groove 120 and the second positioning groove 220. Thus, the two positioning blocks 410 of the connecting member 400 are inserted into the first positioning groove 120 and the second positioning groove 220, respectively, to achieve the positioning connection with the inner spring 100 and the outer spring 200. That is, the inner spring 100 and the outer spring 200 are positioned and fixed by two connectors 400. The two connecting members 400 are welded to the inner spring 100 and the outer spring 200, respectively, so that the inner spring 100 and the outer spring 200 are welded and fixed. So, be convenient for fast with inner spring 100 and outer spring 200 welded fastening, promoted inner spring 100 and outer spring 200's the convenience of being connected, promoted inner spring 100 and outer spring 200's firm in connection degree, strengthened high strength composite spring's structural stability.

Another object of the present invention is to provide a method for manufacturing the high-strength composite spring, which is achieved by the following technical solutions:

a manufacturing method of a high-strength composite spring comprises the following steps: the method comprises the following steps: the inner spring 100 and the outer spring 200 are made of spring steel, and the outer side of the inner spring 100 is drilled by a drill to form a plurality of first limiting grooves 110. The inner side of the outer spring 200 is drilled by a drill to form a plurality of second limiting grooves 210. Step two: the inner spring 100 is inserted into the outer spring 200. Step three: both ends of each connecting rod 300 are respectively inserted into a first limiting groove 110 of the inner spring 100 and a second limiting groove 210 of the outer spring 200. That is, after the first and second limiting grooves 110 and 210 are formed, the inner and outer springs 100 and 200 are pressed to mount and abut the connecting rods 300 to the inner and outer springs 100 and 200, respectively, by using the elastic deformation performance of the inner and outer springs 100 and 200. Step four: the top end of the inner spring 100 is welded to the top end of the outer spring 200, and the bottom end of the inner spring 100 is welded to the bottom end of the outer spring 200, thereby enabling a high-strength compound spring.

The manufacturing method of the high-strength composite spring greatly facilitates the user to manufacture the high-strength composite spring, improves the manufacturing efficiency of the high-strength composite spring and shortens the production time. After the inner spring 100, the outer spring 200 and each connecting rod 300 are manufactured and molded, the inner spring 100, the outer spring 200 and each connecting rod 300 can be assembled and connected. And finally, fixing the joints of the head end and the tail end of the inner spring 100 and the outer spring 200 only by welding. Therefore, the production and the manufacture of the high-strength composite spring are very convenient, and the efficiency of manufacturing the high-strength composite spring is improved. In addition, the manufacturing cost is reduced. The inner spring 100, the outer spring 200 and each connecting rod 300 are installed and connected through smart matching, so that the high-strength composite spring is formed. The elastic acting force is improved, and the structural strength is enhanced.

In order to enhance the structural strength of the high-strength compound spring, in one embodiment, the inner spring 100 and the outer spring 200 are made of carbon spring steel in step one. The carbon spring steel is high-quality carbon structural steel with the carbon content WC within the range of 0.6-0.9%. Thus, the inner spring 100 and the outer spring 200 are made of carbon spring steel, so that the elastic acting force is improved, and the stress resistance is enhanced. So, the structural strength of high strength composite spring has been promoted.

In order to enhance the structural stability of the high-strength compound spring, in one embodiment, the inner spring 100 and the outer spring 200 are made of alloy spring steel in step one. The alloy spring steel is based on carbon steel, and one or more alloy elements are properly added to improve the mechanical property, hardenability and other properties of the steel so as to meet the requirements of manufacturing various springs. Specifically, in one embodiment, the alloy spring steel is silicon-manganese spring steel. In another embodiment, the alloy spring steel is a silicon-chromium spring steel. In yet another embodiment, the alloy spring steel is a chromium manganese spring steel. Thus, the inner spring 100 and the outer spring 200 are made of alloy spring steel to further increase the elastic force and further enhance the stress resistance. Thus, the structural strength of the high-strength compound spring is further enhanced.

In order to satisfy the bar shape with a certain structural strength, the cost is further reduced, and in one embodiment, in the first step, the inner spring 100 is made of alloy spring steel, and the outer spring 200 is made of carbon spring steel. Since the inner spring 100 is a core member receiving an external impact force, the impact force applied to the outer spring 200 directly acts on the inner spring 100 through each connecting rod 300. The inner spring 100 is made of alloy spring steel to enhance structural strength and improve impact resistance. The inner spring 100 is made of alloy spring steel with high cost, and the outer spring 200 is made of carbon spring steel with low cost. So, optimized the structure of high strength composite spring, under the bar of the good structural strength of assurance, further reduced manufacturing cost.

To enhance structural stability, in one embodiment, the connecting rod 300 is made of cemented carbide. The hard alloy has a series of excellent performances of high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and the like, and particularly has high hardness and wear resistance. Thus, the structural strength of the connecting rod 300 is higher. Thus, the structural stability of the high-strength compound spring is further enhanced.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.