TWM451215U - Improved linking shaft of automatic screwdriver - Google Patents

Description

Automatic screwdriver coupling shaft improvement

This creation is aimed at improving the function of the automatic screwdriver, especially the dual function of quick combination and clamping positioning, and the effect of combining the automatic screwdriver with the various types of screwdrivers to achieve a true combination and stable clamping, thereby improving the snail The accuracy of the lock operation to improve the quality of the automatic screwdriver coupling shaft.

According to the known automatic screwdriver, the internal composition generally includes: a motor mechanism for providing power output, a gear mechanism for providing power transmission and shifting, a clutch mechanism for setting a required torque value, and a clamp for providing a coupling and disengaging screwdriver. The head mechanism and the trigger mechanism for providing the operation button; the automatic screwdriver formed thereby can be combined with various types of screwdriver heads through the chuck mechanism to achieve the required screw lock operation and effect.

The above-mentioned chuck mechanism generally includes: a coupling shaft for providing the insertion of the driver head; a ring sleeve sleeved on the end edge of the coupling shaft, and a steel ball embedded therein to provide the positioning screwdriver head; The spring is embedded between the coupling shaft and the collar to provide positioning or release of the collar to the screwdriver head by sliding action; a snap ring for positioning the spring. Therefore, in use, when the screwdriver is to be combined, the sleeve is inserted and inserted into the end of the screwdriver head, and the sleeve is covered by the elastic restoring force of the spring to cover the end of the screwdriver head and is dropped by the steel ball. The positioning is achieved in the annular groove below the tip, and the effect of quickly combining the screwdriver head is obtained. When the screwdriver head is disassembled, the push ring is moved to disengage the steel ball from the ring groove, and the restriction on the screwdriver head can be released and easily removed or replaced.

The above-mentioned automatic screwdriver chuck mechanism does not have much problem in use, and it can meet the simple locking requirement of the general user for many years, but it is considered that the product can continue to exist in the market. It is necessary to continuously develop and improve the performance of existing products. Especially for the chuck mechanism, since the common common screwdriver head provides a structure for combining and positioning, an annular groove is arranged under the end, so the design is matched with the chuck mechanism. The inner surface of the ring sleeve is provided with steel balls to achieve the card abutting effect; however, the combination method can only provide the combined positioning of the chuck mechanism and the screwdriver head, and can not limit the rotation of the screwdriver head, so the correctness of the requirements for the precision screw lock operation is In terms of accuracy, it is obviously impossible to achieve.

This creator feels this, is actively thinking and starting research, in the self-expectation and continuous efforts, trials, and finally develop and design this more sophisticated and practical.

The main purpose of the present invention is to provide an automatic screwdriver coupling shaft improvement, and the coupling shaft provides the dual functions of quick coupling and clamping positioning, so that the automatic screwdriver can achieve the effect of real binding and stable clamping when combined with various types of screwdriver heads. In turn, the accuracy of the screw lock operation is improved to achieve the effect of good screw lock quality.

In order to achieve the above objectives, the technical means adopted in this case is to design and propose a new automatic screwdriver coupling shaft improvement, the automatic screwdriver includes at least a motor mechanism, a gear mechanism, a clutch mechanism, a chuck mechanism, a trigger mechanism, and the like. The shafting is disposed in the chuck mechanism and coaxially connected with the impact rod in the chuck mechanism; the coupling shaft mainly comprises an oblong shaft and is provided with a first portion and a second portion of the coaxial portion. The end edge of the first portion is provided with an insertion groove for providing a piercing connection of the impact rod, and the end edge of the second portion is provided with a coupling groove for providing a joint insertion of the bit; the surface of the second portion is defined by different a section of the first section and the second section of the diameter of the second section is provided with a positioning hole and one or more clamping holes arranged on the circumference of the coupling groove, and the positioning hole and the one or more a steel ball is disposed in the clamping hole, and a sliding sleeve is disposed on the second portion to slide between the first segment and the second segment, and the sliding sleeve matches the second segment An elastic body is embedded between the circumferential surfaces to provide a traction sleeve reset, and a C-shaped ring is fixed on the second end edge.

Further, the shape of the groove of the coupling groove may be any geometric shape to match the shape of the joint end of the conventional common screwdriver head, such as any one of a circular shape, a square shape and a polygonal shape.

Further, the coupling shaft can be used for any of various automatic screwdrivers such as electric, pneumatic, and semi-automatic screwdrivers.

Further, a circumferential sleeve of the second section of the second portion of the coupling shaft is provided with a ring sleeve for fixing the outside of the clamping hole to prevent the steel ball from falling.

In order to enable the review committee to further understand the structural features and functions of the creation, the following preferred embodiments are described in detail with the drawings:

Referring to the first figure, a structural diagram of an automatic (electric) screwdriver is disclosed, wherein the automatic driver can be of any type of electric or pneumatic type, and can be a common upright or gun shape.

The automatic driver (1) has a housing outside, and includes at least a motor mechanism (11), a gear mechanism (12), a clutch mechanism (13), a chuck mechanism (14), and a trigger mechanism (picture surface) inside the housing. Not shown); wherein the motor mechanism (11) is for providing power output, and meshes with the transmission gear mechanism (12); the gear mechanism (12) provides effective power transmission and shifting, and is coupled to the torsion mechanism (13); The torque mechanism (13) is provided with a clutch set and a torsion spring for providing a set torque value; the chuck mechanism (14) provides quick coupling and disengagement of various types of screwdriver heads; the trigger mechanism provides control buttons and prevention buttons Reset effect. Since the above-mentioned constituent units are the basic structure of the automatic screwdriver, and are not the focus of the original creation, it is not allowed much. Make a statement.

As for the structural improvement feature of the creation, the improvement of the chuck mechanism for the automatic screwdriver facilitates the quick and stable combination of various types of screwdriver bits. Therefore, the coupling shaft (2) designed in the present case is a chuck mechanism (14) disposed in the automatic screwdriver, and is coaxially connected with the impact rod (141) in the chuck mechanism (14); Thereby, when the coupling shaft (2) is combined with various types of different types of screwdriver bits (3), the screwdriver head (3) can be pulled by a series of power transmission functions of the automatic driver (1) to achieve the desired type. Screw lock operation. For the specific structure of the coupling shaft (2), please refer to the second figure, which mainly includes an oblong shaft (21), and a ring flange (22) is arranged at the middle of the shaft (21) to Separating into a first portion (23) and a second portion (24), a piercing rod (141) for providing a chuck mechanism (14) is inserted through the end edge of the first portion (23) a groove (not shown) is provided at the end of the second portion (24), and a coupling groove (241) for providing a plurality of types of fastener heads (3) is inserted into the groove of the coupling groove (241). The shape may be any geometric shape to match the shape of the joint end (31) of the conventional common screwdriver head (3), such as a circle, a square, a polygon, etc., and the joint end of the screwdriver head (3) (31) The lower portion has an annular groove (32) for positioning; in particular: the second portion (24) further defines a first segment (242) having a larger diameter and a second segment (243) having a smaller diameter on the surface. a segment of two different diameters and a size, a positioning hole (244) and a clamping hole (245) disposed on the circumference of the coupling groove (241) near the coupling groove (241) on the circumferential surface of the second segment (243), Positioning hole (244) with the one A steel ball (246) is disposed in the upper clamping hole (245), and a sliding sleeve (25) is sleeved on the second portion (24) to slide the first segment (242) and the second segment (243), and the sliding sleeve (25) and the second segment (243) An elastic body (26) is embedded between the mating circumferential surfaces, and a C-shaped ring (27) is fixed at the end of the second segment (243).

According to the above coupling shaft structure, in operation, when the sliding sleeve (25) is slid from the second section (243) of the shaft (21) to the first section (242), the sliding sleeve (25) is released to all the steel balls ( Pressing 246), inserting the joint end of the screwdriver head (3) into the joint groove (241) of the end edge of the second section (243), releasing the sliding sleeve (25) and utilizing the elastic action of the elastic body (26), The sliding sleeve (25) is reset and the pressing of all the steel balls (246) is resumed, so that the screwdriver head (3) is smoothly coupled by the collet mechanism (14), and the dual effects of positioning and clamping are indeed achieved.

Referring to the third figure, the above-mentioned coupling shaft (2) structure type can be applied to all automatic screwdrivers, such as electric, pneumatic, semi-automatic, and with different types of automatic screwdrivers, in the coupling shaft (2) There are some differences in the size, but this part is a simple modification.

Please refer to the fourth and fifth figures together, respectively, showing a schematic diagram of the combination between the coupling shaft and the screwdriver head; the coupling shaft (2) is operated by using the combined end of the screwdriver (3) of the desired form. The head (31) is directly inserted into the coupling groove (241) of the edge of the second portion (24), and is pushed inwardly to the position, so that the elastic body (26) is sleeved at the first portion by the elastic force (23). The outer sleeve (25) slides toward the second portion (24) and causes the steel ball (246) provided in the positioning hole (244) to fall into the annular groove on the circumferential surface of the driver head (3) ( 32), and the steel balls (246) in the remaining clamping holes (245) are made by the pressing action of the outer sliding sleeve (25) to achieve a stable clamping of the coupling head (3) with the end; as shown in the fourth figure It is shown that the steel ball (246) is just clamped on the surface of the joint end (31) of the bit (3), and as shown in the fifth figure, the steel ball (246) is just clipped to the screwdriver head (3). Combination end (31) The angle of the circumferential surface, therefore, regardless of the shape of the joint end (31) of the screwdriver head (3), the steel ball (246) in the pinch hole (245) of the ring design can be used to reach the security clip. System role.

In addition, as shown in the sixth figure, a ring sleeve (28) may be additionally provided on the circumferential surface of the second section (243) of the second portion (24) of the coupling shaft (2) for securing the The outer side of all the clamping holes (245) of the two sections (243) forms a barrier, thereby ensuring and preventing the steel balls (246) built into the clamping holes (245) from falling when the sliding sleeve (25) is displaced.

In this way, the automatic screwdriver coupling shaft of the present invention can improve the combination of the quick coupling and the stable clamping, so that the screwdriver head does not have a idling condition, affecting the quality and precision of the screw lock; on the other hand, it can be widely applied. The chuck mechanism of various automatic screwdrivers of different specifications, shapes and styles is used to obtain a wider range of flexible use effects, thereby improving the overall quality of the automatic screwdriver and making the function and structure of the automatic screwdriver more competitive in the market. .

In summary, the creation of the "Automatic Screwdriver Shaft Improvement" and the conventional automatic tool are only used to make the joint head by simple clips, and the two functions of quick coupling, disassembly and coupling positioning and clamping are combined. There is indeed a significant increase, and the use of value in the rich industry is fully in line with the main purpose of the new patent application, and the application is made in accordance with the law.

The above is a specific embodiment of the present invention and the technical means used therein, and many changes and modifications can be derived therefrom according to the disclosure or teachings herein, and the equivalent changes made according to the concept of the present invention are produced. The role shall not be considered to be within the technical scope of this creation, and shall be preceded by Chen Ming.

(1)‧‧‧Automatic screwdriver

(11)‧‧‧Motor mechanism

(12)‧‧‧ Gear mechanism

(13)‧‧‧Clutch mechanism

(14) ‧ ‧ chuck mechanism

(141)‧‧‧ Impact rod

(2) ‧‧‧ Connecting shaft

(21)‧‧‧ shaft

(22) ‧‧‧ring flange

(23) ‧ ‧ first part

(24) ‧‧‧Second part

(241)‧‧‧Contact slot

(242) ‧ ‧ first paragraph

(243) ‧‧‧second paragraph

(244) ‧‧‧Positioning holes

(245)‧‧‧Clamping holes

(246)‧‧‧ Steel Balls

(25)‧‧‧Sleeve

(26)‧‧‧ Elastomers

(27)‧‧‧C-ring

(28)‧‧‧

(3) ‧ ‧ ‧ screwdriver head

(31) ‧ ‧ joint end

(32) ‧‧‧ annular groove

The first figure is a structural diagram of the automatic screwdriver coupling shaft improved for the automatic screwdriver.

The second figure is a structural exploded view of the improved automatic screwdriver coupling shaft.

The third figure is a variety of different types of structural diagrams for the improvement of the automatic screwdriver coupling shaft.

The fourth figure is a sectional view (I) of the improved implementation state of the automatic screwdriver coupling shaft of the present invention.

The fifth figure is a sectional view (II) of the improved implementation state of the automatic screwdriver coupling shaft of the present invention.

The sixth figure is a view of another improved implementation state of the automatic screwdriver coupling shaft of the present invention.

(2) ‧‧‧ Connecting shaft

(21)‧‧‧ shaft

(22) ‧‧‧ring flange

(23) ‧ ‧ first part

(24) ‧‧‧Second part

(241)‧‧‧Contact slot

(242) ‧ ‧ first paragraph

(243) ‧‧‧second paragraph

(244) ‧‧‧Positioning holes

(245)‧‧‧Clamping holes

(246)‧‧‧ Steel Balls

(25)‧‧‧Sleeve

(26)‧‧‧ Elastomers

(27)‧‧‧C-ring

(3) ‧ ‧ ‧ screwdriver head

(31) ‧ ‧ joint end

(32) ‧‧‧ annular groove

Claims (4)

The utility model relates to an automatic screwdriver coupling shaft. The automatic screwdriver has a matching housing on the outside, and the interior includes at least a motor mechanism, a gear mechanism, a torque mechanism, a chuck mechanism and a trigger mechanism. The coupling shaft is disposed on the chuck. In the mechanism, and coaxially connected with the impact rod in the chuck mechanism; the coupling shaft mainly comprises an oblong shaft, and is provided with a first portion and a second portion of the coaxial body, The end edge of the portion is provided with a matching slot for providing a connecting rod for the impact rod, and the connecting portion of the second portion is provided with a coupling groove for providing a plug-in connection; the surface of the second portion is defined by a first diameter of different diameters a segment and a second segment, wherein a positioning hole is formed on the circumferential surface of the second segment near the end of the coupling groove, and one or more clamping holes are arranged in the surrounding pattern, and the positioning hole and the one or more clamping holes are provided with steel balls The sliding sleeve is sleeved between the first section and the second section, and an elastic body is embedded between the sliding sleeve and the second section to provide a traction sleeve. Reset, and at the second end It is provided with a C-ring is fixed. The invention relates to the improvement of the automatic screwdriver coupling shaft according to the first aspect of the patent application, wherein the shape of the groove of the coupling groove can be any geometric shape to match the shape of the joint end of the conventional common screwdriver head, such as a circle, a square, or a polygon. Any one. The automatic screwdriver coupling shaft improvement according to the first aspect of the patent application, wherein the coupling shaft can be used for any of various automatic screwdrivers such as electric, pneumatic and semi-automatic screwdrivers. The automatic screwdriver coupling shaft improvement according to the first aspect of the patent application, wherein the second section of the second portion of the coupling shaft is provided with a ring sleeve for fixing the outside of the clamping hole to prevent the steel ball from falling.