JP6545477B2 - Torque tool with variable idle angle - Google Patents

Description

  The present invention relates to a torque tool capable of changing the idling angle.

  A torque tool usually refers to a torque wrench or torque driver. That is, it is powered by electric power, human power, or fluid, outputs a constant torque to the workpiece, and performs screw tightening and loosening operations. The workpieces here are screws, bolts, connecting rods and the like.

  A human-powered torque wrench has a gear head mounted on a hollow head, and further has a claw-like engagement structure in the head, meshed with the corresponding gear of the gear head, and the head surrounds the gear head It is determined whether to make it spin in one direction or to make the gear part synchronized in the opposite direction to synchronize and rotate, and output a torque.

  During use, the head makes full use of the gear section to synchronize and rotate, and when it reaches a certain width, it rotates and continuously exerts force.

European Patent Application Publication No. 12195169.3 U.S. Patent Application Publication No. 2013/691477 Japanese Patent Application No. 2013-170474 China Patent Application Publication No. 201210507001.6 Taiwan Patent Application Publication No. 101139643

  However, in the prior art described above, that is, since the number of gears outside the gear portion does not change, the rotation angle decreases the number of gears as the engagement structure exceeds the width of the gears, and the rotation width also increases. is there. Such a torque wrench is difficult to use, especially at a construction site where the operation space is narrow.

  In order to solve the above-mentioned problems, a vendor proposed a method of increasing the number of gears outside the gear portion. While this construction overcomes the over-sized rotation of the prior art, other problems have occurred. Since the width of the gear is narrowed, the pressure resistance of the gear is relatively lowered, and when the head is rotated in synchronization by making full use of the gear portion, a phenomenon often occurs in which torque is not transmitted to the workpiece. The torque exceeds the allowable pressure of the gear and causes damage, making it impossible to continue outputting the torque.

  Then, the inventor considers that the above-mentioned fault can be improved, and as a result of repeating earnest examination, it reaches to the proposal of the torque tool which can change the idling angle of the present invention which effectively improves the above-mentioned subject by rational design. It was The torque tool has already been patented to some countries. For example, European Patent Application Publication No. 12195169.3, US Patent Application Publication No. 13 / 691,477, Japanese Patent Application No. 2013-170474, Chinese Patent Application Publication No. 201210507001.6 and Taiwan Patent See Application Publication No. 101139643.

  The present invention has been made in view of such conventional problems. In order to solve the above-mentioned problems, the present invention mainly aims to provide a torque tool.

In order to solve the problems described above and to achieve the object, a torque tool according to the present invention is:
An internal housing chamber (15) and has a hollow shell wall (13) to be partitioned into a circular cavity (16), the platform having a plurality of grooves on the bottom surface of the housing chamber (15) (20) (19 Is defined, each groove (20) is in communication from the outlet (21) to the circular cavity (16), and one end of the circular cavity (16) is in communication with the platform (19) and the other end is annular portion has a (18), the gear unit having a head (11) to the bottom hole in the center of the annular portion (18) (17) is formed, a plurality of gears (31) and two cylinders (33) (30), these gears (31) are continuously formed around the cylinder (33) , and when the gear portion (30) is inserted into the circular cavity (16), the two cylinders (33) one of is passed through the bottom hole (17) of the annular portion (18), f head ( Gear portion rotatably supported with respect to 1) and (30), capacity dynamic you reciprocate between the meshing position and the separating position with each is So設the groove (20) of the head (11) A meshing kit (40) and a driving meshing kit (50);
Arranged in the other cylinder (33) of the gear section (30) and interlocked with any one meshing kit (50) to determine whether the torque tool adopts single mode or alternating mode Equipped with a pusher (70)
Here, in the single mode, any one active meshing kit (40) is retained for reciprocating movement in the meshing position and the separating position and is meshed with the gear (31) and the other drive meshing kit (50) is is stationary at the separation position, the head (11) and gear unit (30) is rotated to each other in the original idle angle, and in alternating mode, ability kinematic mesh kit (40) and the drive engagement kit (50) meshing position And, it reciprocates at the separation position and alternately meshes the gear (31) to reduce the idle angle of the head (11) and the gear portion (30).

  Preferably, the recessed groove wall surface has a curved surface, a flat surface, and a recess, one side of the recessed portion is adjacent to the curved surface, and the other side is connected to the flat surface, and is enclosed with the bottom to form an internal space of the recessed groove.

Preferably, the angle between the plane (23) of adjacent two grooves (20) of the interposed by ,, said plurality of grooves (20) between the outlet portion curved and plane θ Hold and prevent the active meshing kit and the driving meshing kit from interfering with each other.

  Preferably, the angle here includes a range that conforms to a formula of 360 ° × (M + 1 / L) ÷ N. The constant M is an integer greater than 0, the L refers to the number of concave grooves (20), and the N is the number of gears around the gear portion (30).

  For example, when one rotation of the head and the gear portion is 360 °, the head is provided with three concave grooves and the same number of meshing kits are mounted. Furthermore, under the condition that the gear portion has 36 gears and the constant M is 4, the depression angle of the plane of two surfaces is about 43 °, and it is calculated by the formula 360 ° × (4 + 1/3) ÷ 36 Match the numbers and prevent the three meshing kits from interfering with each other.

  According to the present invention, as the slip angle changes, the torque tool can be operated with a substantially minimum rotation width, under the condition that the number of gears is also fixed and does not change.

It is an external appearance inclination view which assembles the torque tool which concerns on one Embodiment of this invention into a part. It is an expanded view which shows the torque tool shown in FIG. It is a top view of the connection relation of a meshing kit and a gear. FIG. 5 is a plan view taken along the line A-A of FIG. 3; FIG. 5 is a schematic view showing the continuous operation of the torque tool according to the present invention. FIG. 5 is a schematic view showing the continuous operation of the torque tool according to the present invention. FIG. 5 is a schematic view showing the continuous operation of the torque tool according to the present invention. FIG. 5 is a schematic view showing the continuous operation of the torque tool according to the present invention.

  Hereinafter, with reference to the drawings, modes for carrying out the present invention will be described in detail. The present invention is not limited to the embodiments described below.

  Hereinafter, specific embodiments of the present invention will be described based on the attached drawings. 1 to 4 show a specific configuration of the torque wrench 10. The torque wrench 10 has a head 11 and a grip 12. The head 11 is hollow and accommodates the gear portion 30, the active meshing kit 40, the driving meshing kit 50, and the positioning unit. The gripping portion 12 and the head 11 are integrally designed, and the head 11 transmits torque to a workpiece such as a screw.

  A shell wall 13 is defined on the wall around the head 11. By surrounding the shell wall 13, a storage room 15, a circular cavity 16 and a bottom hole 17 are formed. The storage chamber 15 is a non-circular shallow groove, and is communicated with the bottom hole 17 through the circular cavity 16. Apart from the circular cavity 16, another part of the bottom of the storage chamber 15 is the platform 19, which loads the bottom of the cover 61 of symmetrical shape. The circular cavity 16 and the bottom hole 17 are designed to have a large circular shape, and the diameter is larger than the diameter of the bottom hole 17 and smaller than the width of the storage chamber 15, and an annular portion 18 is formed at the bottom of the circular cavity 16. . The depth of the bottom hole 17 is shallower than the circular cavity 16.

  The platform 19 has a spring groove 14 and two recessed grooves 20, and the positioning unit is loaded into the spring groove 14. The opening of the spring groove 14 is interposed between the recessed groove 20 and the wall surface of the storage chamber 15.

  The platform 19 encloses the wall of the groove 20 and is subdivided into a curved surface 22, a flat surface 23 and a recess 24. One side of the recess 24 is adjacent to the curved surface 22 and the other side is connected to the plane 23 and is perpendicular to and surrounded by the bottom 25 to form an internal space. The internal space of the concave groove 20 is connected to the outside by a through hole 26 formed in the bottom 25 and is connected to the circular cavity 16 by an outlet 21 formed separated by a curved surface 22 and a plane 23. The planes 23 of the two grooves 20 are held at an angle θ.

  For the present embodiment, the positioning unit comprises a spring 60 and a ball 65. It is normal for the spring 60 to abut the bottom of the spring groove 14 and push the ball 65 to be exposed to the spring groove 14.

  The gear portion 30 has a plurality of gear wheels 31, two cylinders 33, and a connecting portion 32. The gears 31 are connected to each other to form an outer circumference of the gear portion 30 so as to form different angles from the two adjacent gears 31 to the axial center of the gear portion 30. Each cylinder 33 is projected on the upper and lower end faces of the gear portion 30 along the axial direction.

  Moreover, the said connection part 32 in embodiment is a polygonal hole, penetrates the center of the two cylinders 33 and the gear part 30 along axial direction, and is provided in the workpieces, such as a screw, a nut, and a connecting rod. Be done. In one embodiment, the gear portion 30 has two coupling portions 32. Each coupling portion 32 is a substantially polygonal cylindrical body and extends out of the end of the cylinder 33 by a certain length.

  The gear portion 30 is inserted into the circular cavity 16 of the head 11, the gear 31 faces the wall surface around the circular cavity 16 and the outlet 21 of the recessed groove 20, and the lower cylinder 33 passes the bottom hole 17. Fasteners 35 are fitted to portions of cylinder 33 exposed from head 11 and abutted on annular portion 18 to prevent gear portion 30 from separating from head 11, and mutual rotation of gear portion 30 and head 11. It does not affect

  The structure of the above-mentioned active engagement kit 40 and drive engagement 50 is almost the same except for the small differences. The same portion of the structure here refers to the configuration of the engaging member 41, the engaging member 51, the elastic member 45, and the elastic member 55 common to the active meshing kit 40 and the driving meshing 50. Further, the engaging member 41 and the engaging member 51 have the shaft portion 42 and the shaft portion 52 which are designed to substantially represent a cylinder, and the outer circumferential surface of the shaft portion 42 and the shaft portion 52 is a convex portion 43 along the radial direction. And the convex part 53 is extended | stretched and the circular root part 44 and the root part 54 project on the bottom face of the axial part 42 and the axial part 52 along axial direction.

  Furthermore, the difference in structure here is that the self-supporting pin 56 is installed in the drive engagement kit 50, and the self-supporting pin 56 stands upright on the upper surface of the engagement member 51. The active meshing kit 40 has no self-supporting pin, and the structure associated with the engaging member 41 is not designed.

  The engaging member 41 and the engaging member 51 are inserted into the corresponding recessed groove 20 of the head 11, the root 44 and the root 54 are inserted into the through hole 26, and the support shaft 42 and the shaft 52 are recessed 24. It rotates and makes the convex part 43 and the convex part 53 interlock, and makes it reciprocate between the curved surface 22 and the plane 23.

One end of each elastic member 45 and elastic member 55 is in contact with the curved surface 22 and the other end is in contact with one side of the convex portion 43 and the convex portion 53, and the other side of the convex portion 43 and the convex portion 53 approaches the flat surface 23. Generate the necessary force to Thus, the instrumentation after casting of the active engagement kit 40 and the driving engagement 50, the convex portion 43 and convex portion 53 to reciprocate between a separation position and a meshing position. Incidentally, the meshing position in this case indicates a position at which the convex portion 43 and the convex portion 53 maintain the meshing state with the gear 31. Since the convex portion 43 and the convex portion 53 are similar to a rectangle, the corner has a substantially gear shape, and the concave portion of the gear entering between the two adjacent gears 31 exerts a considerable meshing effect. Here, the separated position refers to a position where the corners of the convex portion 43 and the convex portion 53 are separated from the concave portion of the gear and do not mesh with the gear 31 of the gear portion 30.

The cover 61 has a hole 62, a movable hole 63 and a restriction hole 64. The cover 61 is stored in the storage chamber 15, the hole 62 covers the outer circumference of the cylinder 33 above the gear portion 30, and the support gear portion 30 is rotated by the circular cavity 16. Also, the self-supporting pin 56 passes through the movable hole 63 and does not prevent the cover 61 from covering above the recessed groove 20 and prevents the active meshing kit 40 and the driving meshing 50 from being separated from the head 11. Furthermore, the ball 65 also passes through the limiting hole 64. Since a fixed gap separating the wall surface of the movable hole 63 and the support pin 56 is formed, the reciprocation of the engagement member 51 is not affected.

The upper surface of the cover 61 is a pusher 70. The pusher has a pin joint hole 71, and the wall surface of the pin joint hole 71 surrounds the cylinder 33 above the gear portion 30, and is engaged with the cylinder 33 by the other fasteners 34 and protrudes from the portion of the cover 61 , Prevents the pusher 70 and the cover 61 from being separated from the head 11, and does not prevent the pusher 70 from moving relative to the cover 61.

The pusher 70 further includes a switching portion 72, two recesses 73, and a stress portion 74. The switching portion 72 forms an arc-shaped groove on the bottom surface of the pusher 70 based on the curvature, covers a portion of the support pin 56 projecting from the cover 61, and the distance from the support pin 56 to the ball 65 according to the reciprocating motion of the pusher 70. Are changed to determine whether the engaging member 51 is to be retained at the separated position. Any one recess 73 to house the portion exposed from the restriction hole 64 of the ball 65 in accordance with reciprocating motion of the pusher 70, to generate a localization effect similar to engaging with the pusher 70. The use of the torque wrench 10 in a single mode or in an alternating mode is selected by the pusher 70.

In the alternate mode shown in FIGS. 5 and 6, the self-supporting pin 56 of the drive meshing kit 50 is guided by the switching portion 72 of the pusher 70 and is separated from the ball 65, and the corresponding portion of the gear portion 30 along with the convex portion 43 of the active meshing kit 40. Gear 31 is engaged alternately.

  In the present embodiment, the gear portion 30 has 36 gears 31, and the constant M is equivalent to substituting 3 for the formula 360 ° × (3 + 1⁄2) ÷ 36, and it is between the two planes 23. The design value of the angle θ of about 35 ° is obtained. Therefore, the two engagement members 41 and the engagement members 51 do not interfere with each other.

  In the initial state, the convex portion 43 of the active meshing kit 40 is positioned at the meshing position and is meshed with the corresponding gear 31 of the gear portion 30, and the convex portion 53 of the drive meshing kit 50 is pushed by the gear 31 to the separated position. The elastic member 55 is pressed. When idling starts, the convex portion 53 of the drive meshing kit 50 is meshed with the gear 31 of the gear portion 30, and the convex portion 43 of the active meshing kit 40 is pressed by the gear 31 to the separated position and squeezes the elastic member 45.

  Then, according to the formula of 360 ° ÷ 36, an angle of about 10 ° from the two adjacent gears 31 of the gear portion 30 to the axis is obtained. Before the convex portion 43 of the active meshing kit 40 is meshed with the next gear 31, the convex portion 53 of the drive meshing kit 50 is meshed with the corresponding gear 31. As a result, the angle at which the head 11 wraps around the gear portion 30 and idles is approximately equal to 5 °, thereby achieving the purpose of reducing the idle angle.

In the single mode illustrated in FIGS. 7 and 8, the pusher 70 is moving in the opposite direction, the free-standing pins 56 by jointly the switching section 72 is limited to be close to the ball 65, separating the engagement member 51 Stay in position.

  In the initial state, the convex portion 43 of the active meshing kit 40 is positioned at the meshing position and meshed with the corresponding gear 31 of the gear portion 30. When the idle rotation is started, the convex portion 43 is pushed to the separated position by the gear 31 and squeezes the elastic member 45 and is meshed with the next gear 31. In order for the convex portion 53 of the drive meshing kit 50 to maintain the separated position from the beginning to the end, it does not mesh with any one gear 31 of the gear portion 30, and the angle at which the head 11 and the gear portion 30 mutually idle is original It will be 10 degrees.

  The above embodiments are only for explaining the technical concept and features of the present invention, and it is intended to make those skilled in the art understand and implement the contents of the present invention. It does not limit the scope of the claims. Accordingly, improvements or modifications having various similar effects without departing from the spirit of the present invention are intended to be included in the following claims.

Reference Signs List 10 torque wrench 11 head 12 grip portion 13 shell wall 14 spring groove 15 storage chamber 16 circular cavity 17 bottom hole 18 annular portion 19 platform 20 recessed groove 21 outlet portion 22 curved surface 23 flat surface 24 recessed portion 25 bottom portion 26 through hole 30 gear portion 31 Gears 32 Joints 33 Cylinders 34 Fastenings 35 Fastenings 40 Active Meshing Kits 41 Engaging members 51 Engaging members 42 Shafts 52 Shafts 43 Shafts 43 Projections 49 Routes 54 Routes 45 Elastics 55 Elastics 50 Drives Meshing kit 56 Support pin 60 Spring 61 Cover 62 Hole 63 Movable hole 64 Restricted hole 65 Ball 70 Pusher 71 Pin joint hole 72 Switching part 73 Recess 74 Stressed part θ angle

Claims (10)

An internal housing chamber (15) and has a hollow shell wall (13) to be partitioned into a circular cavity (16), the platform having a plurality of grooves on the bottom surface of the housing chamber (15) (20) (19 Is defined, each groove (20) is in communication from the outlet (21) to the circular cavity (16), and one end of the circular cavity (16) is in communication with the platform (19) and the other end is A head (11) having an annular portion (18) and having a bottom hole (17) formed at the center of the annular portion (18);
A gear (30) having a plurality of gears (31) and two cylinders (33) , the gears (31) being continuously formed around the cylinder (33) , the gear (30) ) has been inserted into the circular cavity (16), one of the two cylinders (33) is passed through the bottom hole (17) of the annular portion (18), rotated with respect to f head (11) A gear portion (30) which is supported
And each head (11) ability kinematic mesh kit (40) you reciprocate between the meshing position and the separating position with the So設the groove (20) and of the driving engagement kit (50),
Arranged in the other cylinder (33) of the gear section (30) and interlocked with any one meshing kit (50) to determine whether the torque tool adopts single mode or alternating mode Equipped with a pusher (70)
Here, in the single mode, any one active meshing kit (40) is retained for reciprocating movement in the meshing position and the separating position and is meshed with the gear (31) and the other drive meshing kit (50) is is stationary at the separation position, the head (11) and gear unit (30) is rotated to each other in the original idle angle, and in alternating mode, ability kinematic mesh kit (40) and the drive engagement kit (50) meshing position And a torque tool which reciprocates in the separation position and alternately engages the gear (31) to reduce the idle angle of the head (11) and the gear portion (30). The wall surface of the recessed groove (20) includes a curved surface (22), a flat surface (23), and a recess (24), one side of the recessed portion (24) is adjacent to the curved surface (22), and the other side is a flat surface (23) Connected to the bottom (25) to form the interior space of the recess (20), and the outlet (21) is interposed between the curved surface (22) and the plane (23) , the angle between the plane (23) of adjacent two grooves (20) of the groove (20) is held by the theta, these active engagement kits (40) and the drive engagement kit (50) interfere with each other The torque tool according to claim 1, characterized in that it prevents. The range of the angle (θ) between the planes (23) of two adjacent ones of the plurality of concave grooves (20) among the plurality of concave grooves (20) conforms to the following formula,
360 ° × (M + 1 / L) ÷ N
The said constant M is an integer greater than 0, Said L points out the quantity of a ditch | groove (20), Said N is a gear number around gear part (30), Torque tool. The cover (61) has a shape corresponding to the storage chamber (15), the cover (61) includes a hole (62) and a movable hole (63), and the cover (61) stores the head (11). When delivered to the chamber (15), the cover (61) is closed off by the pusher (70) and not separated from the head (11), the hole (62) being the other cylinder (33) of the gear portion (30) The torque tool according to claim 2, characterized in that the movable hole (63) faces one of the two recessed grooves (20). The cover (61) further has a limiting hole (64), and the spring (14) is formed in the platform (19) when the cover (61) is stored in the storage chamber (15). , The positioning unit comprises a spring (60) and a ball (65), the spring (60) being abutted against the bottom of the spring groove (14) and pushing the ball (65) past the restriction hole (64) A torque tool according to claim 4, characterized in that it is engaged in one of two recesses (73) formed on the bottom of the pusher (70). Each active engagement kit (40) and drive engagement kit (50) comprises an engagement member (41), an engagement member (51), an elastic member (45), and an elastic member (55), and the elastic member (45) and One end of the elastic member (55) is in contact with the curved surface (22) and the other end is in contact with the engaging member (41) and the engaging member (51), and the engaging member (41) and the engaging member (51) Provides the force necessary to reciprocate between the curved surface (22) and the plane (23),
Any one meshing kit (50) has a free standing pin (56), which is installed on the engaging member (51) and passes through the movable hole (63) of the cover (61), The torque according to claim 4, characterized in that the switching part (72) is connected to the self-supporting pin (56) by the pusher (70) to determine whether the engaging member (51) is to be retained in the disengaging position. tool.   Each engaging member (41) and the engaging member (51) have a shaft (42), a shaft (52), a projection (43), and a projection (53), and the shaft (42) and the shaft The part (52) is substantially circular and is loaded into the corresponding recess (24), the protuberances (43) and the protuberances (53) are similar to a rectangle, and the shank (42) and the shank (52) The invention is characterized in that it is extended radially from the peripheral edge and the corners of the projections (43) and of the projections (53) mesh with the gear (31) of the gear part (30). The torque tool according to 6.   Each engaging member further includes a shaft (42) and a root (44) and a root (54) projecting from the lower side of the shaft (52) along the axial direction, and the grooves (20) A torque tool according to claim 7, characterized in that it is inserted into a through hole (26) formed in the bottom.   A torque tool according to claim 1, characterized in that said gear portion (30) comprises at least one connection (32) for connecting workpieces.   Fasteners (34) and fasteners (35) are fitted to the cylinder (33), and the fasteners (34) and fasteners (35) prevent the gear portion (30) from separating from the head (11) A torque tool according to claim 1, characterized in that the gear part (30) does not influence the rotation of the circular cavity (16).

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