TWI700455B - Universal joint manufacturing method and universal joint manufactured by this method - Google Patents

Abstract

The present invention relates to a universal joint made by a method for manufacturing a universal joint. After assembly is followed by cold welding, cooling and grinding processes, a universal joint with elastic pressing force and smooth surface is obtained. It has the elastic pressing force to avoid shaking, and it will not hurt the user's hand when it is applied to manual tools, pneumatic or electric tools to rotate quickly, and through the cold welding process, it can prevent the spring from being exposed to excessive temperature. Deformed.

Description

Universal joint manufacturing method and universal joint manufactured by this method

The present invention relates to a method for manufacturing a universal joint and a universal joint made by this method. In detail, it is a method for manufacturing a universal joint with both elastic pressing force and smooth surface, which is suitable for use in hand tools or pneumatics. , When the power tool rotates quickly, it will not hurt the user's hand.

According to, in today, the use of many tools is often limited by the factors of the special working environment, and cannot be used normally. For example, in a space that is too narrow and turning, the tools cannot be directly inserted into the operation, in order to meet the above-mentioned special working environment , That is, the industry has designed universal joint tools.

Please refer to the Republic of China Patent Publication No. 244918 "Universal Joints for Torque Transmission Tools", a universal joint for use with torque transmission tools. The universal joint includes; the first part has a concave The groove is adapted to accommodate the driving bolt of the tool and has a first joint part; the second part has a driving bolt suitable for engaging the tool head and has a second joint part; and at least one connecting element connected to the first joint And the second joint part; the at least one connecting element transmits torque between the first and second parts, while allowing the first and second parts to rotate.

The foregoing is a conventional universal joint creation. The joint components are pivoted in different directions from the first part and the second part to achieve the application of universal pivoting. However, the first part and the second part of the conventional universal joint If a spring is not used for elastic positioning applications, it is easy to produce unnecessary shaking during use. Therefore, related creators have introduced the creation of universal joints with springs close to the pivot part. The first part and the second part are provided by the spring. The two parts and the connecting element have elastic pressing force, which eliminates the shortcomings that the pivoting parts of the universal joint are easy to shake; however, the conventional universal joint combined by riveting means that the plug is easier to be riveted into an enlarged shape , So the selected metal The hardness of the material is relatively low, and its strength is relatively weakened. When it is used with electric tools or pneumatic tools, it often happens that the bolt is not resistant to strong vibration and breaks. In addition to making the work unsmooth, it breaks and falls out. In order to make the outer surface of the connector have a smooth and flat appearance, the two enlarged ends of the bolt will be flat against the outer ring surface of the connector during riveting. However, relatively The thickness of the two enlarged ends is thinner, and the compressive strength is also weakened. When the universal joint is matched with an electric tool or a pneumatic tool, after long-term strong vibration, the two enlarged ends often break.

In view of this, based on years of experience in the development of related industries, the creators have in-depth discussions on the problems faced by existing technologies and actively seek solutions. After long-term research and development, they have finally successfully created a The method of making joints is to weld the two ends of the plug to the pipe wall of the joint through cold welding at the edge of the plug, so that the strength of the plug itself and the bonding strength between them are extremely strong, and it is not easy to be damaged. After that, it can make the outer surface of the joint present a smooth and integrated appearance, so that it will not hurt the user's hand when it is used in hand tools, pneumatic or electric tools, and fast rotation. Moreover, cold welding can effectively avoid access The spring of the pivot is deformed during the processing, so that after the universal joint is assembled, it still retains the elastic pressing force to avoid improper shaking.

The present invention relates to a method for manufacturing a universal joint and a universal joint made by this method. It is a method for manufacturing a universal joint with both elastic pressing force and smooth surface. The manufactured universal joint not only has Avoid the elastic pressing force of shaking, and it will not hurt the user's hand when it is applied to manual tools, pneumatic or electric tools and fast turning.

The universal joint of the embodiment of the present invention includes a socket, an adapter, a connecting rod, a first pin, a second pin, a first spring, and a second spring. One end of the socket has a For the sleeve connection port for the sleeve connection, the other end of the socket is formed with two symmetrical first pivot lugs, and a space for one end of the connecting rod is reserved between the two first lugs. One end of the adapter is There is an adapter rod for connecting with a wrench. The other end of the adapter is formed with two symmetrical second pivot ear parts. A space for the other end of the connecting rod is reserved between the two second ear parts. A bolt is inserted through the first pivot part and the connecting rod, the second bolt is inserted through the second pivot part and the connecting rod, the first pivot part and the second pivot part are reversed and pivoted Assume At both ends of the connecting rod, an inner hole for the first spring and the second spring is formed in the connecting rod near the first pin and the second pin. Rod, the second spring is elastically pressed against the second pivot ear part and the connecting rod; wherein the two ends of the first bolt and the second bolt end are fused by cold welding technology, and are respectively connected to the first pivot ear part and the first pivot part. The two pivot ears are fused into one body, and the fusion joint is polished to a smooth surface.

The manufacturing method of the universal joint of the present invention includes procedures such as assembly, electric welding, cooling and grinding. The assembly procedure is to install the first spring and the second spring that constitute the universal joint in the inner holes at the proximal ends of the connecting rod. Continued Compress the first spring and the second spring so that the two ends of the connecting rod are respectively placed between the two first ears and between the two second ears, and then pass the two first ears and the connecting rod with the first pin, and The second plug passes through the two second ears and the connecting rod, so that the socket, the adapter and the connecting rod pivot together; The electric welding procedure is to weld the ends of the first pin and the second pin to fuse them between the first ear and the second ear, respectively, and fill the gap between the ear and the pin; The cooling procedure is to place the finished but welded semi-finished universal joint at room temperature to reduce the temperature generated by the electric welding process to room temperature; the grinding procedure is to weld the joints of the two first ears and the two second ears. Be ground to a smooth surface.

From the foregoing creation content, it can be seen that the universal joint made according to the universal joint manufacturing method of the present invention is a universal joint with both elastic pressing force and smooth surface. It not only has elastic pressing force to avoid shaking, but also And when it is applied to hand tools or pneumatic and electric tools for rapid rotation, it will not hurt the user's hand, and through the cold welding process, it can prevent the spring from being deformed due to excessive temperature; therefore, the present invention can be said to be an equivalent Practical and progressive creations are worthy of being promoted by the industry and made public.

1‧‧‧Socket

11‧‧‧Sleeve mouth

12‧‧‧First ear

2‧‧‧Adapter

21‧‧‧Adapter lever

22‧‧‧Second Ear

3‧‧‧Connecting rod

3A‧‧‧Connecting rod

31‧‧‧Inner hole

31A‧‧‧Inner hole

4‧‧‧First bolt

5‧‧‧Second pin

6‧‧‧First spring

6A‧‧‧First spring

7‧‧‧Second Spring

7A‧‧‧Second spring

The first figure is a three-dimensional exploded view of the universal joint of the present invention before assembly.

The second figure is a schematic cross-sectional view of the complete assembly procedure of the universal joint of the present invention.

The third figure is a schematic cross-sectional view of the cold welding procedure of the universal joint of the present invention.

The fourth figure is a schematic cross-sectional view of the universal joint of the present invention completing the grinding process.

The fifth figure is a schematic diagram of the three-dimensional appearance of the finished universal joint of the present invention.

The sixth figure is a step diagram of the method for manufacturing a universal joint according to the present invention.

The seventh figure is a perspective exploded view of the second embodiment of the universal joint of the present invention before assembly.

Figure 8 is a schematic cross-sectional view of the finished product of the second embodiment of the universal joint of the present invention.

The present invention relates to a method for manufacturing a universal joint and a universal joint made by this method. It is a method for manufacturing a universal joint with both elastic pressing force and a smooth surface. The manufactured universal joint is not only It has the elastic pressing force to avoid shaking, and it will not hurt the user's hand when it is applied to manual tools, pneumatic or electric tools and quickly rotates.

Please refer to the first to fifth figures, the universal joint of the embodiment of the present invention includes a socket 1, an adapter 2, a connecting rod 3, a first pin 4, a second pin 5. A first spring 6 and a second spring 7, one end of the socket 1 has a socket 11 for sleeve connection, and the other end of the socket 1 is formed with two symmetrical first pivot parts 12, the A space is reserved between the two first ears 12 for the configuration of one end of the connecting rod 3. One end of the adapter 2 has an adapter rod 21 for connecting with a wrench, and the other end of the adapter 2 is formed with two symmetrical A space for the other end of the connecting rod 3 is reserved between the two second ear parts 22, and the first pin 4 penetrates the first hinge part 12 and the connecting rod 3. The second pin 5 is inserted through the second pivot part 22 and the connecting rod 3. The first pivot part 12 and the second pivot part 22 are reversed and pivoted at both ends of the connecting rod 3. The connecting rod 3 An inner hole 31 for the first spring 6 and the second spring 7 is formed near the first pin 4 and the second pin 5, and the first spring 6 springs against the first pivot part 12 and the connecting rod 3. The second spring 7 springs against the second pivot ear portion 22 and the connecting rod 3; wherein, the end ends of the first pin 4 and the second pin 5 are fused by cold welding technology, and are respectively fused with the first The pivot ear part 12 and the second pivot ear part are fused into one body, and the fusion joint is polished to have a smooth surface.

Please refer to the sixth figure. The manufacturing method of the universal joint of the present invention includes the procedures of assembly, welding, cooling, and grinding. The assembly procedure is to set the first spring and the second spring of the universal joint near the connecting rod. The inner holes at both ends continue to compress the first spring and the second spring so that the two ends of the connecting rod have to be placed between the two first ears and between the two second ears respectively, and then pass the first pin through the two second ears. One ear and the connecting rod, and the second plug pass through the two second ears and the connecting rod, so that the bearing The joint, the adapter and the connecting rod pivot are together (as shown in the first and second pictures); the electric welding procedure is to weld the ends of the first pin and the second pin to fuse them to the first ear. And the second ear, and fill the gap between the ear and the pin (as shown in the third figure); the cooling process is to place the finished but welded semi-finished universal joint at room temperature, so that the electric welding process produces The temperature is lowered to room temperature; the grinding procedure is to grind the joints of the two first ears and the two second ears into a smooth surface (as shown in the fourth and fifth pictures).

It can be seen from the foregoing invention that the finished universal joint manufactured by the method of manufacturing the universal joint of the present invention has the following advantages;

1. The system has a spring set at the pivotable joint of the universal joint, and provides the elastic pressing force of the socket and the adapter and the connecting rod. The operator will not shake the universal joint at will, which is convenient for the universal joint. The joint can be easily positioned at the working position when used.

2. The end of the plug is cold welded to weld the two ends of the plug to the pipe wall of the joint, so that the strength of the plug itself and the bonding strength between them are extremely strong, and it is not easy to be damaged, and the welding part can be made after grinding. It presents a smooth appearance that is integrated with the outer surface of the joint, so that it will not hurt the user's hand when it is used in hand tools, pneumatic or electric tools and quickly turned.

3. In addition, the present invention welds the end edge of the pin through the cold welding process, which has the advantage of greatly reducing the operating temperature compared to the traditional welding hot melt method, and can effectively prevent the spring close to the pivot from being too high during the process. The temperature of the universal joint is deformed, so that after the universal joint is assembled, it still retains the elastic pressing force to avoid improper shaking.

Please refer to Figures 7 and 8, which is the second embodiment of the universal joint of the present invention. The connecting rod 3A is provided with the inner hole 31A for the first spring 6A and the second spring 7A. The inserting positions of the first plug 4 and the second plug 5 are coaxial hierarchical holes.

The above descriptions are only used to explain the preferred embodiments of the present invention, and are not intended to restrict the present invention in any form. Therefore, any modification related to the present invention made under the same inventive spirit Or changes, other aspects that can be implemented and have the same effect should still be included in the scope of the present invention.

In summary, the present invention "manufacturing method of universal joint and universal joint made by this method "Direction joint", in terms of structural design and practicality, indeed meets practicality, and the disclosed structural invention also has an unprecedented innovative structure, so it should be considered "novelty", and the present invention can be compared The conventional structure is more effective, and therefore “progressive”. It is fully in line with the provisions of China's patent law on invention patent applications. Therefore, Yan filed a patent application with the Jun Office in accordance with the law and urged Jun Office to grant the patent right for this case as soon as possible. To feel good.

1‧‧‧Socket

11‧‧‧Sleeve mouth

12‧‧‧First ear

2‧‧‧Adapter

21‧‧‧Adapter lever

22‧‧‧Second Ear

3‧‧‧Connecting rod

Claims (2)

A method for manufacturing a universal joint includes procedures such as assembly, electric welding, cooling, and grinding, wherein the assembly procedure is to install the first spring and the second spring constituting the universal joint in the inner holes at the proximal ends of the connecting rod, respectively , Continue to compress the first spring and the second spring so that the two ends of the connecting rod have to be respectively placed between the two first ears and between the two second ears, and then pass the two first ears and the connecting rod with the first pin , And the second plug pass through the two second ears and the connecting rod, so that the socket, the adapter and the connecting rod pivot together; the electric welding procedure is to weld the two ends of the first plug and the second plug to make them separate It is fused between the first ear and the second ear, and fills the gap between the ear and the pin; the cooling process is to place the semi-finished product of the universal joint after welding at room temperature, so that the temperature generated by the electric welding process Reduce to room temperature; the grinding procedure is to grind the joints of the two first ears and the two second ears to a smooth surface. A universal joint includes a socket, an adapter, a connecting rod, a first pin, a second pin, a first spring and a second spring, wherein one end of the socket has a supply For the socket of the sleeve connection, the other end of the socket is formed with two symmetrical first pivot ears, and a space for one end of the connecting rod is reserved between the two first ears. One end of the adapter has An adapter rod for wrench connection, the other end of the adapter is formed with two symmetrical second pivot ears, and a connecting rod is reserved between the two second ears In the space provided at the other end, the first pin is inserted through the first pivot portion and the connecting rod, the second pin is inserted through the second pivot portion and the connecting rod, the first pivot portion and the second pivot The ears are reversed and pivoted at both ends of the connecting rod in a staggered manner. The connecting rod has an inner hole for the first spring and the second spring to be arranged near the first pin and the second pin. The first spring is elastic Abutting against the first pivot ear part and the connecting rod, the second spring springs against the second pivot ear part and the connecting rod; wherein the two ends of the first pin and the second pin are fused by cold welding technology, and They are respectively fused with the first pivot ear part and the second pivot ear part, and the fusion joint is polished to a smooth surface.

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