TWM478574U - Screwdriver bit structure - Google Patents

Description

Screwdriver head structure

The utility model relates to a screwdriver head structure, which relates to a screwdriver head used for assembling a pneumatic machine or an electric motor, which has a driving portion and a working portion and a handle portion between the two end portions is a buffer portion, and the buffer portion is The two-arc curved surface and the straight-line segment surface are formed. By the proportional arrangement of the curved curved surface and the straight-line segment, the screwdriver head can improve the working efficiency, and the high rotational force brought by the machine is used to reduce the breaking loss rate of the screwdriver head.

The utility model relates to a screwdriver head patent No.: M358701, which is a quick-damaged screwdriver head structure, which comprises a joint portion and a working portion, wherein: the working portion comprises a driving end and a transition portion, and the transition portion is provided with a a first neck portion engaged with the driving end, a second neck portion engaged with the joint portion, and a first neck portion and a second neck portion, and having a smaller diameter than the first neck portion and the second neck portion And the transition section is gradually reduced from the first neck to the diameter of the buffer portion, and then the arc-shaped concave shape of the buffer portion to the second neck portion is gradually increased, so as to extend the deformation time when the force is deformed, and the warning effect is obtained. Buffer section.

The above disadvantage is that the diameter between the first neck portion and the second neck portion of the buffer portion is gradually reduced, so the diameter of the intersection of the first neck portion and the second neck portion is too small, so that when the implement rotates the screwdriver head at a high speed, The relative force of the screwdriver head can not accept the anti-stress road in the buffer part, which leads to the decrease of the fatigue value of the screwdriver head, but the fracture force of the screwdriver head is also increased. plus.

The present invention is capable of improving the lack of fatigue quality in the buffer portion of the conventional screwdriver. Point, research and improvement on the neck of the buffer part, especially the splitter head buffer part is composed of two arc curved surfaces and a straight line segment surface, and the split head has a high fatigue resistance by the proportional arrangement of the curved curved surface and the straight line segment. Quality and high torsion quality to reduce the breakage rate of the screwdriver head.

The utility model relates to a screwdriver head structure, wherein the driver head is provided with a driving portion and a working portion, and a buffer portion is integrally connected between the driving portion and the working portion, and the driving portion extends in the longitudinal direction at the buffer portion. The concave curved surface is surrounded by the first segment neck, the first segment neck continues to extend toward the working portion, and the longitudinal axis is parallelly wound around the second segment neck, and the second segment neck continues to the working portion to extend the third segment. The neck is formed by a concave curved surface, the third section is disposed at a front portion of the working end and extends in a lateral direction; and the buffer portion is a three-section neck connecting working portion and a driving portion. The head is a curved curved surface of the first section neck viewed from the side, and the second section neck is continuous at the front end of one of the outer edges of the boundary, and the second section neck is a straight surface viewed from the side, at the outer edge of one of the boundaries The front end of the third section neck is curved as a curved curved surface, and further characterized in that the length of the third section neck is greater than the length of the second section neck, and the length of the first section neck is smaller than the third section. Neck or equal to The length of the neck section.

(1) ‧ ‧ ‧ screwdriver head

(12)‧‧‧ Drive Department

(11) ‧‧‧Working Department

(13) ‧ ‧ buffer

(A) ‧‧‧first section neck

(B) ‧‧‧Second section neck

(C) ‧ ‧ third section neck

A‧‧‧outer diameter

C‧‧‧outer diameter

B‧‧‧outer diameter

The first figure is one of the new implementation diagrams.

The second picture is the second embodiment of the new implementation.

In order to fully understand the present invention, the preferred embodiments will be described in detail below with reference to the accompanying drawings, and the drawings of the preferred embodiments of the present invention are further described in the following, in order to enable those skilled in the related art to obtain the related art. The statements in this specification are hereby implemented and are not intended to limit the technical scope of the present invention.

Please refer to the first embodiment of the present invention as shown in the first figure, wherein the driver head (1) is provided with a driving portion (12) and a working portion (11) at the driving portion (12) and the working portion ( 11) a buffer portion (13) is integrally connected, and a longitudinal section of the driving portion (12) extends at a junction of the buffer portion (13) and is surrounded by a concave curved surface as a first segment neck (A). The first section neck (A) continues to extend in the direction of the working portion (11) and is straightly wound around the longitudinal axis as the second section neck (B). Continuing, the second section neck (B) goes to the working part (11) The extended third section neck (C) is formed by a concave curved surface, and the third section neck (C) is disposed at a front portion of the working portion (11) and extends in the longitudinal direction; The buffer portion (13) is a three-section neck (A), (B), (C) connecting working portion (11) and a driving portion (12) serving as a screwdriver head (1), and the first portion is viewed from the side The neckline of the neck (A) is a curved arc curve, and the second section neck (B) is continued at the front end of one of the boundaries, and the neckline of the second section neck (B) is viewed as a straight line from the side, at one boundary thereof. The front end is connected to the third section neck (C), and the third section is viewed from the side. The neckline of the neck (C) is a curved arc curve, and the other description is that the first section neck (A) and the third section neck (C) are concave arc cone faces, and the second section neck (B) a straight cylindrical surface, further characterized in that the axial length of the third section neck (C) is greater than the axial length of the second section neck (B), and the axial length of the first section neck (A) is less than The third section neck (C) is equal to the axial length of the third section neck (C).

The axial length between the second section necks (B) is calculated by the following formula: As shown in the first figure, the first type of driving portion (12) is in the shape of a pointed end, the maximum outer diameter is a, and the outer diameter c of the second section neck (B) of the calculation buffer portion (13) is sized as follows: a×0.65=c

Calculate the length of the second section neck (B) of the buffer portion (13) as: B≧a÷c

As shown in the second figure, the second driving portion (12) has a shape of a flat head, and the maximum outer diameter is b, and the outer diameter c of the second section neck (B) of the calculation buffer portion (13) is sized as follows: b ×0.8=c

Calculate the length of the second section neck (B) of the buffer portion (13) as: B≧b÷c

Further, the driver (12) driving portion (12) is inserted into the driven portion of the screw, and is formed in the buffer portion (13) by the torque of the motor having a high rotational speed, and the buffer portion (13) is designed by the second segment neck (B). The strength structure is advantageous. The three parts of the driving part (12), the buffer part (13) and the working part (11) are differently impacted by the torque of the electric motor, and there are three forms of impact force in the form. In the radial direction, from the central portion of the shaft, the rotation line of the driving portion (12) surrounding the rotation axis and the region of the buffer portion (13) and the working portion (11) are substantially parallel to each other in the radial direction to The working portion (11) is a point of application, and the driving portion (12) is a force receiving point on a radial surface of the driving portion (12), the buffer portion (13), and the working portion (11) with respect to the rotation axis. The first portion of the impact force is received by the driving portion (12), and the impact force is received by the buffer portion (13), and finally transmitted to the working portion (11) to receive the impact force of the third position. .

The main feature is that the first section neck (A) and the third section neck of the buffer portion (13) (C) a concave curved surface formed by the side of the ring, wherein the concave curved surface extending in the axial running direction to the circumferential surface of the second section neck (B) is a straight cylindrical shape, which is equal to the second section neck (B) The end is connected to the two arcuate first section neck (A) and third section neck (C) length direction.

In view of the above, such a configuration is such that the minimum outer diameter of the entire buffer portion (13) is The width of the smallest outer diameter of the conventional buffer portion (13) is large. This also causes a weakening of the fixing force of the first section neck (A) and the third section neck (C), since the curvatures of the first section neck (A) and the third section neck (C) are correspondingly decreased, The diameter of the diameter of the second section neck (B) is increased, so that the strength of the buffer portion (13) is increased. In general, this will result in a slight offset of the torsional and seismic forces generated by the high speed rotation of the implement when the drive unit (12) is inserted into the corresponding screw driven portion.

Motor operated screwdriver head with pointed head and flat head The driving portion also has a non-circular shape, particularly a hexagonal cross-sectional shape driving portion or a flat-shaped driving portion, and therefore, the length of the third-section neck (C) of the buffer portion (13) is according to the driving portion ( The shape of 12) may be calculated from different impact torsion forces.

This case is especially for a comparison table with the anti-fatigue test of the conventional screwdriver structure, such as Attached to Annexes 1 and 2, the new tip of the screwdriver head product code is: EG PH2, the known tip screwdriver product code is: KHC PH2; the size of the pointed screwdriver head is in accordance with international standards. Standardized rated torque test, the known torque head PH2 international standard specification torque value is 10.3Nm (Newton meters), KHC PH2 with average torque value of 10.3Nm (Newton meters) for testing, forward rotation 14 minutes per minute, return to each turn 12 minutes in minutes, when the data is 5500~6000 times, it shows that the damage has been broken, and the EG PH2 of the case is tested with an average torque value of 10.5Nm (Newton meters). The new screwdriver has more than 6500 times and the torque is slightly higher. 0.2N/m approximately = 2kg/cm still not broken; In addition, in Annex 2, the new flat head screwdriver product code is: EG T27, the conventional flat head screwdriver product code is: KHC T27; the conventional screwdriver head T27 international standard specification torque value is 26.9 (Newton meters), KHC T27 The average torque value is 26.8Nm for testing. The forward rotation is 14 revolutions per minute, and the return position is 12 revolutions per minute. When the data is 10000 times, it shows that the damage has been broken. In this case, the EG T27 has an average torque value of 27.5Nm (Newton). M) test, the new type of screwdriver has more than 11,000 times and the torque is slightly higher 0.7N / m about = 7kg / cm is still not broken; after the experimental data comparison, the new model is indeed progressive, in order to propose a new patent Application.

In summary, it is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. That is, the equal changes and modifications made by the scope of the new patent application are covered by the scope of the new patent.

(1) ‧ ‧ ‧ screwdriver head

(11) ‧‧‧Working Department

(12)‧‧‧ Drive Department

(13) ‧ ‧ buffer

(A) ‧‧‧first section neck

(B) ‧‧‧Second section neck

(C) ‧ ‧ third section neck

A‧‧‧outer diameter

C‧‧‧outer diameter

Claims (4)

The utility model relates to a screwdriver head structure. The screwdriver head is provided with a driving portion and a working portion. The buffer portion is integrally connected between the driving portion and the working portion, and the concave portion is surrounded by a concave curved surface extending in the longitudinal direction of the driving portion at the buffer portion. a first segment neck, the first segment neck continues to extend in the direction of the working portion and is straightly wound around the longitudinal axis as a second segment neck, and the second segment neck continues to the working portion to extend the third segment neck to a concave curved surface Formed around, the third section neck is disposed at an intersection of the buffer portion extending between the working portions, wherein the buffer portion second section neck is a straight cylindrical shape at an outer edge of one of the boundaries The two ends are connected to the first section neck and the third section neck, and the first section neck and the third section neck are curved side curved surfaces which are viewed from the side, that is, the concave arc cone surface, and further characterized by the third section The length of the segment neck may be greater than the length of the second segment neck, and the length of the first segment neck may be less than the length of the third segment neck or equal to the length of the third segment neck. The screwdriver head structure according to claim 1, wherein the driving portion has a pointed shape, and the second portion neck B length is calculated by: a maximum outer diameter of a, and a second section neck of the buffer portion is calculated. The outer diameter c size is: a × 0.65 = c; the length of the second section neck of the calculation buffer portion is: B ≧ a ÷ c. The screwdriver head structure according to claim 1, wherein the driving portion has a flat shape, and the second portion neck B length is calculated by: a maximum outer diameter b, and a calculation of the second portion of the buffer portion outside the neck portion. The diameter c dimension is: b × 0.8 = c; the length of the second section neck of the calculation buffer is: B ≧ b ÷ c. A screwdriver head structure, the screwdriver head is provided with a driving portion and a working portion, and the driving portion The buffer portion is integrally connected with the working portion, and extends in the longitudinal direction of the driving portion at the intersection of the buffer portion, and the concave curved surface surrounds the first segment neck, and the first segment neck continues to extend toward the working portion by the longitudinal direction. The axis is straightly wound around the second segment neck, and the second segment neck continues to extend toward the working portion. The third segment neck is formed by a concave curved surface, and the third segment neck is disposed at the buffer portion and extends to the working portion. Intersection, wherein the second section neck of the buffer portion is a straight cylindrical shape, and the first section neck and the third section neck are connected at both ends of one of the boundary outer edges, the first section neck And the third section neck is curved as a curved curved surface, that is, a concave arc cone surface, and further characterized in that the length of the third section neck is greater than the length of the second section neck, and the length of the first section neck a length smaller than the third segment neck or equal to the third segment neck; and the driving portion is in the shape of a pointed end, and the second segment neck B length is calculated as: the maximum outer diameter is a, and the calculation buffer portion is The size of the outer diameter of the two-section neck c is: a × 0.65 = c; calculation buffer The length of the second section neck is: B≧a÷c; and the driving part is in the shape of a flat head, and the second section neck B length is calculated as: the maximum outer diameter is b, and the second section of the buffer portion is calculated. The neck outer diameter c is dimensioned as: b x 0.8 = c; the length of the second section neck of the calculation buffer is: B ≧ b ÷ c.