JP2012154413A - Universal joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a universal joint capable of preventing an intermediate connecting part, operation side connecting part and further a tool from hanging down without control as much as possible, relative to a drive side connecting part.SOLUTION: The universal joint includes a drive-side connecting part 11, an operation-side connecting part 12, and an intermediate connecting part 13. Even when the drive-side connecting part 11 and the intermediate connecting part 13 are inclined to each other within a predetermined rage, a straight-state restoring force (holding power) always acts on the drive-side connecting part 11 and the intermediate connecting part 13 to return them to the straight state by means of a protrusion 111b at the top of a spherical head part 111 of the drive-side connecting part 11 and a slanted surface 138a2 of a funnel 138a of a plate part 138 urged with a contracted spring 137, thereby preventing the connected point between the drive-side connecting part 11 and the intermediate connecting part 13 from bending or hanging down without control.

Description

  The present invention relates to a universal joint that can be connected at a free angle within a predetermined range between a driving side connecting portion and an intermediate connecting portion and between an operating side connecting portion and an intermediate connecting portion.

  As a universal joint (also referred to as a universal joint or a universal socket, which is generically referred to as a universal joint in the present invention) capable of connecting two connecting members at different connecting angles, for example, it is used for a tool for transmitting torque (for example, , Patent Document 1), bearing hole portions are provided at both ends of the intermediate shaft portion, and an input shaft and an output shaft each having a spherical head are respectively inserted into the bearing hole portions at both ends, and the intermediate shaft There has been proposed a universal function having a universal angle setting function at two positions on both ends of the part to increase the degree of freedom of the connection angle (see, for example, Patent Document 2).

JP-A-7-96473 JP-A-9-68235

  However, since the universal joints of Patent Documents 1 and 2 have a universal (universal joint) function having a universal angle setting function at two locations, when a heavy tool is attached to the operating side connecting portion, an intermediate connection is made together with the tool. There exists a subject that a part and an action | operation side connection part may hang down with respect to a drive side connection part. For this reason, when a heavy tool is attached and work is performed in a narrow space, it takes time to fit workpieces and the like, which may result in poor work efficiency and work efficiency.

  Then, an object of this invention is to provide the universal joint which can prevent an intermediate | middle connection part, an action | operation side connection part, and also a tool drooping arbitrarily with respect to a drive side connection part as much as possible.

In order to solve the above problems, a universal joint of the present invention has a spherical head having a torque transmission portion formed on the tip end side, a drive side connecting portion in which a handle is connected to the rear end side, and a tip portion A tool mounting portion on which a tool is mounted on the side, an operating side coupling portion having a spherical head formed with a torque transmitting portion for transmitting torque on the rear end side, and a driving side end portion The spherical head of the driving side connecting portion is inserted into the driving side connecting portion, and the spherical head of the operating side connecting portion is inserted into the operating side end. An operation side spherical head insertion hole that engages with the torque transmission part, and an intermediate connection part that transmits torque transmitted from the drive side connection part to the operation side connection part, and The spherical head of the drive side connecting part is provided with a protruding convex part. On the other hand, the drive-side spherical head insertion hole of the intermediate connection portion is in contact with the convex portion of the spherical head of the drive-side connection portion, and is a conical funnel portion biased by an elastic member. The universal joint is characterized in that a plate portion formed with is provided.
In addition, the universal joint of the present invention has a spherical head having a torque transmitting portion formed on the front end side, a drive side connecting portion in which a handle is connected on the rear end side, and a tool on the front end side. The working side connecting portion having a spherical head formed with a torque transmitting portion for transmitting torque to the rear end portion side, and the driving side connecting portion at the driving end portion The spherical head is inserted into the drive side spherical head insertion hole to be engaged with the torque transmitting portion, and the spherical head of the operating side connecting portion is inserted into the operating side end to transmit the torque. An operation side spherical head insertion hole that engages with a portion, and an intermediate connection portion that transmits torque transmitted from the drive side connection portion to the operation side connection portion. The spherical head is provided with a protruding protrusion, while the front A plate portion in which a conical funnel portion urged by an elastic member is formed in the operation side spherical head insertion hole of the intermediate connection portion, which is in contact with the convex portion of the spherical head of the operation side connection portion. Is a universal joint characterized by that.
In addition, the universal joint of the present invention has a spherical head having a torque transmitting portion formed on the front end side, a drive side connecting portion in which a handle is connected on the rear end side, and a tool on the front end side. The working side connecting portion having a spherical head formed with a torque transmitting portion for transmitting torque to the rear end portion side, and the driving side connecting portion at the driving end portion The spherical head is inserted into the drive side spherical head insertion hole to be engaged with the torque transmitting portion, and the spherical head of the operating side connecting portion is inserted into the operating side end to transmit the torque. An operation side spherical head insertion hole that engages with the drive part, and an intermediate connection part that transmits torque transmitted from the drive side connection part to the operation side connection part. In the spherical head and the spherical head of the operating side connecting portion, Each of the projecting convex portions is provided, while the driving side spherical head insertion hole and the operation side spherical head insertion hole of the intermediate connection portion are respectively provided with the driving side connection portion and the operation. The universal joint is characterized in that a plate portion is provided on which a conical funnel portion urged by an elastic member is formed, which is in contact with the convex portion of the spherical head portion of the side connecting portion.
Here, a driving side spherical head insertion hole and an operating side spherical head insertion hole, and a driving side spherical head insertion hole and an operating side thereof are respectively provided at the driving side end and the operating side end of the intermediate coupling portion. While a torque transmission pin that penetrates the spherical head insertion hole is provided, the central portion of each of the spherical head of the driving side connecting portion and the spherical head of the operating side connecting portion is the torque transmitting pin. A substantially circular hole through which a pin passes, and expands in the axial direction of the intermediate connecting portion as it approaches the upper and lower openings, and becomes a long hole in the upper and lower openings, and the torque transmission hole into which the torque transmission pin is inserted And the torque transmission pins provided at the driving side end and the operating side end of the intermediate connecting portion may be provided in the same plane and in parallel.

  According to the universal joint of the present invention, at least one of the spherical head of the driving side connecting portion and the spherical head of the operating side connecting portion is provided with a protruding convex portion. At least one of the driving-side spherical head insertion hole and the operating-side spherical head insertion hole of the intermediate connecting portion that abuts is provided with a plate portion on which a conical funnel portion urged by an elastic member is formed. Therefore, except when working with the tool attached to the operating side connecting part, the conical funnel part of the plate part urged by the elastic member and the spherical head of the driving side connecting part or the operating side connection Since the convex part of the spherical head of the part causes a holding force or a restoring force to act so that the driving side connecting part or the operating side connecting part returns to the slate state with respect to the longitudinal central axis of the intermediate connecting part, the driving side connecting Intermediate connection part and working side connection part Furthermore, it is possible to prevent as much as possible that the tool is hanging freely.

(A), (b) is a figure which shows the state which respectively mounted | worn with the impact wrench main body and tool to the universal joint of the embodiment of this invention, and the universal joint. It is an exploded sectional view in the state where a universal joint of an embodiment of the present invention shown in Drawing 1 (a) was seen from the front. It is the disassembled top view of the drive side connection part which looked at the universal joint of embodiment of this invention shown to Fig.1 (a) from upper direction, an action | operation side connection part, and an intermediate | middle connection part. (A)-(c) is a figure which shows the example of the installation structure of the lock pin in the action | operation side connection part shown in FIG. 3, an example of the external appearance of a plate part, and another example, respectively. (A)-(c) is the whole universal joint sectional view of an embodiment, an AA line sectional view, and a BB line sectional view, respectively. (A)-(c) is the external view and sectional drawing which respectively show the straight state return function in the universal joint of embodiment. It is whole sectional drawing which shows the other structural example of the universal joint of embodiment of this invention. It is whole sectional drawing which shows the further another structural example of the universal joint of embodiment of this invention. It is a figure which shows the state which mounted | wore the ratchet wrench handle and the tool with the universal joint of embodiment of this invention.

  Next, an example of the universal joint of the embodiment of the present invention will be described with reference to the drawings.

  1A and 1B show a front view of a universal joint 1 according to an embodiment of the present invention, and a state where an impact wrench body 2 and a tool 3 are mounted on the universal joint 1, respectively.

  That is, as shown in FIG. 1A, the universal joint 1 of the present embodiment includes a drive side connecting portion (also referred to as F portion) 11 and an operating side connecting portion (also referred to as M portion). 12 are connected to the intermediate connecting portion 13. And, for example, as shown in FIG. 1B, in the universal joint 1 of the present embodiment, various tools 3 are connected to the operating side connecting portion 12, while the driving side connecting portion 11 has For example, the drive shaft 21 of the impact wrench body 2 that is tightened by applying impact or rotation to a nut (not shown) or the like via the tool 3 by compressed air, a slide mechanism, or the like is connected. In FIG. 1B, 114 is an O-ring made of rubber or the like that prevents the connecting pin 113 (see FIG. 2) from falling off.

  FIG. 2 is an exploded cross-sectional view of the universal joint 1 according to the embodiment of the present invention shown in FIG. FIG. 3 is an exploded plan view of the driving side connecting portion 11, the operating side connecting portion 12, and the intermediate connecting portion 13 when the universal joint 1 according to the embodiment of the present invention shown in FIG. .

  As shown in FIGS. 2 and 3, the drive side connecting portion 11 has a spherical head 111 in which a torque transmitting hole 111 a is formed as a torque transmitting portion on the front end portion side, while the impact wrench main body 2 is on the rear end portion side. And a wrench main body side connecting portion 112 to which are connected.

  As shown in FIGS. 2 and 3, in the universal joint 1 of the embodiment, a convex portion 111 b is provided at the tip of the spherical head 111 of the drive side connecting portion 11. Further, the spherical head portion 111 of the drive side connecting portion 11 has a substantially circular hole at the center portion through which the torque transmission pin 133 passes, and an opening angle substantially in the axial direction of the intermediate connecting portion as it approaches the upper and lower openings. A torque transmission hole 111a is formed which expands at 60 ° and becomes an elongated hole at the upper and lower openings. With the torque transmission hole 111a having such a shape, the driving side connecting portion 11 can freely change the angle with respect to the intermediate connecting portion 13 in the range of the opening angle of 60 ° in the vertical direction in the figure. Further, since the torque transmission pin 133 is inserted into the torque transmission hole 111a and supports the drive side connecting portion 11 so as to be rotatable, the angle can be freely changed within a predetermined range in the front and back direction of the figure. .

  2 and 3, the wrench main body side connecting portion 112 of the driving side connecting portion 11 includes, for example, a drive shaft connecting hole 112a into which the driving shaft 21 of the impact wrench main body 2 is inserted, and a driving shaft. A connection pin insertion hole 112b into which a connection pin 113 for connecting the drive shaft 21 of the impact wrench body 2 inserted in the connection hole 112a and the drive side connection portion 11 is inserted is formed. After the drive shaft 21 of the impact wrench body 2 is inserted into the drive shaft connection hole 112a, the connection pin 113 is inserted into the connection pin insertion hole 112b, and the drive shaft 21 of the impact wrench body 2 and the drive side connection portion 11 After connecting, the O-ring 114 made of rubber or the like is fitted into the ring groove 112c to prevent the connection pin 113 from falling off.

  Further, as shown in FIGS. 2 and 3, the operating side connecting portion 12 is provided with a tool mounting portion 122 to which the tool 3 is mounted on the front end portion side, while torque is transmitted to the rear end portion side. A spherical head 121 having a torque transmission hole 121a is provided as a torque transmission part. Further, as shown in FIGS. 4A and 5B, which will be described later, the tool mounting portion 122 of the operating side connecting portion 12 is provided with a lock pin 122a that moves forward and backward urged by a spring 122b. . As will be described later with reference to FIG. 4A, the advance / retreat hole 122c through which the lock pin 122a advances / retreats may or may not penetrate, and the lock pin 122a Of course, a steel ball or the like may be used instead of the pin shape.

  As shown in FIGS. 2 and 3, the spherical head 121 of the operating side connecting portion 12 is substantially circular with a torque transmission pin 134 passing through the central portion, like the spherical head 111 of the driving side connecting portion 11. A torque transmission hole 121a which is a shape hole and expands at an opening angle of approximately 60 ° in the axial direction of the intermediate coupling portion as it approaches the upper and lower openings, and becomes a long hole shape hole in the upper and lower openings. With the torque transmission hole 121a having such a shape, the operating side connecting portion 12 can freely change the angle with respect to the intermediate connecting portion 13 in the range of the opening angle of 60 ° in the vertical direction in the figure. In addition, since the torque transmission pin 134 is inserted into the torque transmission hole 121a and supports the operating side connecting portion 12 so as to be rotatable, the angle can be freely changed within a predetermined range in the front and back directions of the figure. .

  Further, as shown in FIGS. 2 and 3, the intermediate coupling portion 13 includes a driving side spherical head in which the spherical head portion 111 of the driving side coupling portion 11 is inserted into the driving side end portion 131 on the driving side coupling portion 11 side. While the part insertion hole 131a is formed, the operation side spherical head insertion hole 132a into which the spherical head 121 of the operation side connection part 12 is inserted is formed in the operation side end part 132 on the operation side connection part 12 side. ing.

  The driving side end 131 and the operating side end 132 of the intermediate connecting portion 13 include the torque transmission hole 111a of the spherical head 111 of the driving side connecting portion 11 and the spherical head of the operating side connecting portion 12, respectively. Torque transmission pin insertion holes 131b and 132b into which torque transmission pins 133 and 134 for transmitting torque are inserted are formed in 121 torque transmission holes 121a. Then, after the torque transmission pins 133 and 134 are inserted into the torque transmission pin insertion holes 131b and 132b, respectively, the drive side connection portion 11 of the intermediate connection portion 13 is prevented so that the torque transmission pins 133 and 134 do not fall off. The pin drop-off prevention rings 135 and 136 are fitted on the side and the operating side connecting portion 12 side. In addition, on the outer peripheral surfaces of the drive side end 131 and the operation side end 132 of the intermediate connecting portion 13, the insertability of the pin drop prevention rings 135 and 136 is improved at a predetermined width and a predetermined interval in the circumferential direction, respectively. Spline grooves 131c and 132c are formed for preventing rotation, and negative grooves 131d recessed in the circumferential direction are provided to prevent the pin drop-off prevention rings 135 and 136 from coming off in the axial direction of the intermediate connecting portion 13. 132d is formed. Therefore, after mounting the pin drop prevention rings 135 and 136 on the driving side end 131 and the operating side end 132, the opposing sides of the driving side end 131 and the operating side end 132 are crushed from the outside. It fits in the negative grooves 131d and 132d. It is optional to form the negative grooves 131d and 132d, the spline grooves 131c and 132c, and the like.

  Here, the torque transmission pins 133 and 134 are inserted into the driving side end portion 131 and the operation side end portion 132, respectively, on the same plane and in parallel. Therefore, on the same plane, the driving side connecting portion 11 can set a maximum 60 ° angle with respect to the intermediate connecting portion 13 and the operating side connecting portion 12 can set a maximum 60 ° angle with respect to the intermediate connecting portion 13. The side connecting portion 11 and the working side connecting portion 12 can set an angle of 120 ° at the maximum.

  The drive-side spherical head insertion hole 131a of the intermediate connecting portion 13 is formed with a conical funnel portion 138a biased by a spring 137, as shown in FIG. 2 and FIG. The plate portion 138 is inserted, and the convex portion 111b comes into contact with the tip portion of the spherical head portion 111 of the driving side connecting portion 11 to the funnel portion 138a. One end of the spring 137 is in a contracted state and abuts against the bottom surface of the plate portion 138 opposite to the funnel portion 138a, while the other end of the spring 137 is the tip of the spherical head 121 of the operating side connecting portion 12. Abuts against the part.

  FIGS. 4A to 4C are views showing an installation structure of the lock pin 122a in the operating side connecting portion 12 shown in FIG. 3, an example of the appearance of the plate portion 138, and another example, respectively.

  That is, as shown in FIG. 4 (a), the tool mounting portion 122 of the operating side connecting portion 12 is formed with an advance / retreat hole 122c having the same diameter as the spring 122b and the lock pin 122a, and the advance / retreat hole 122c has a spring. A lock pin 122a urged by 122b is provided. The lock pin 122a is inserted into the advance / retreat hole 122c, and then, as shown in FIG. 5B, the entrance portion of the advance / retreat hole 122c is crushed to prevent the lock pin 122a from coming off. The advance / retreat hole 122c may be penetrated or not penetrated, and the lock pin 122a may be a steel ball or the like instead of a pin shape. Anything that can be fixed is acceptable.

  FIG. 4B shows the appearance of the plate portion 138, and a funnel portion 138 a having a conical inclined surface 138 a 2 and a deepest portion 138 a 1 is formed on the plate portion 138. The plate portion 138 shown in FIG. 4B is provided with a flat portion 138b around the funnel portion 138a. However, like the plate portion 138 ′ shown in FIG. 4C, the funnel portion 138a ′. Of course, it is possible not to provide a flat portion around the. In the plate portion 138 shown in FIG. 4B and the plate portion 138 ′ shown in FIG. 4C, when the driving side connecting portion 11 is set to the maximum opening angle 60 ° with respect to the intermediate connecting portion 13. However, both of the convex portions 111b of the spherical head 111 of the drive side connecting portion 11 are contracted because they are located on the outermost surfaces of the inclined surfaces 138a2, 138a2 ′ of the funnel portions 138a, 138a ′ of the plate portions 138, 138 ′. Due to the urging force of the spring 137, a return force that causes the drive side connecting portion 11 to return to a straight state acts on the intermediate connecting portion 13.

  5A to 5C are an overall cross-sectional view, a cross-sectional view taken along line AA, and a cross-sectional view taken along line BB, respectively, of the universal joint 1 of the embodiment.

  As shown in FIG. 5A, in the universal joint 1 of the embodiment, the spherical head 121 at the distal end of the operating side connecting portion 12 is inserted into the operating side spherical head insertion hole 132a of the intermediate connecting portion 13, and the operating side connecting A torque transmission pin 134 is inserted into the torque transmission hole 121a of the spherical head 121 at the tip of the portion 12, and a pin drop prevention ring 136 is provided at the operating side end 132 of the intermediate connecting portion 13 so that the torque transmission pin 134 does not fall off. Fitted.

  On the other hand, the spherical head 111 of the driving side connecting portion 11 is inserted into the driving side spherical head inserting hole 131a of the intermediate connecting portion 13, and torque is transmitted to the torque transmission hole 111a of the spherical head 111 of the driving side connecting portion 11. The pin 133 is inserted, and a pin drop prevention ring 135 is fitted to the drive side end 131 of the intermediate connecting portion 13 so that the torque transmission pin 133 does not fall off.

  And in the universal joint 1 of embodiment, the convex part 111b of the spherical head 111 front-end | tip of the drive side connection part 11 is arrowed by the spring 137 contracted between the spherical head 121 of the operation | movement side connection part 12 front-end | tip. It contacts the inclined surface 138a2 of the funnel portion 138a of the plate portion 138 pushed outward in the α direction. In addition, in the state where the drive side connecting portion 11 and the intermediate connecting portion 13 are aligned in a straight line, the spherical head 121 at the tip of the operating side connecting portion 12 is the deepest deepest portion 138a1 at the center of the funnel portion 138a of the plate portion 138. Shall be located.

  FIG. 5B is a cross-sectional view taken along line AA of the working side connecting portion 12 of the universal joint 1 of the embodiment, in a state where the lock pin 122a is urged by the spring 122b and is prevented from coming off. It shows that there is.

  FIG. 5C is a cross-sectional view taken along line B-B of the drive side coupling portion 11 of the universal joint 1 according to the embodiment, and a rectangular drive shaft coupling hole 112a into which the drive shaft 21 and the like of the impact wrench body 2 are inserted. It can be seen that a connection pin insertion hole 112b penetrating the wrench body side connection portion 112 of the drive side connection portion 11 is formed.

  6A to 6C are an external view and a cross-sectional view showing a straight state return function in the universal joint 1 of the embodiment, respectively.

  That is, as shown in FIGS. 6A and 6B, the drive side connecting portion 11 and the intermediate connecting portion 13 are inclined with respect to the central axis in the longitudinal direction of the intermediate connecting portion 13 so that the head is swung. In this case, the convex portion 111b at the tip of the spherical head 111 of the drive side connecting portion 11 is in contact with the inclined surface 138a2 of the funnel portion 138a of the plate portion 138. Here, since the plate portion 138 is pushed in the direction of the arrow α by the spring 137 contracting with the spherical head 121 at the distal end of the operating side connecting portion 12, the inclined surface of the funnel portion 138a of the plate portion 138 The straight state return (holding) force acts so that the convex portion 111b at the tip of the spherical head 111 of the drive side connecting portion 11 is moved to the deepest deepest portion 138a1 at the center of the funnel portion 138a of the plate portion 138 by 138a2. Yes.

  That is, in the case of the universal joint 1 of the present embodiment, when the driving side connecting portion 11 and the intermediate connecting portion 13 are inclined such that the head is swung within a predetermined range, the spherical head of the driving side connecting portion 11 111, the projection 111b at the tip and the inclined surface 138a2 of the funnel portion 138a of the plate portion 138 biased by the contracted spring 137, the drive side connecting portion 11 is in the arrow β direction, and the intermediate connecting portion 13 is in the γ direction. A straight state returning (holding) force is acting so as to return to the straight state. However, when the impact wrench main body 2 or the like is mounted on the drive side connecting portion 11, a straight state returning (holding) force is applied to the drive side connecting portion 11 so that the intermediate connecting portion 13 returns to the straight state in the γ direction. To do.

  As a result, when the external force no longer acts on the driving side connecting portion 11 and the intermediate connecting portion 13 or the like, the driving side connecting portion 11 and the intermediate connecting portion 13 return to the straight state as shown in FIG. Become. Then, in a state where the driving side connecting portion 11 and the intermediate connecting portion 13 are returned to the straight state, the convex portion 111b at the tip of the spherical head 111 of the driving side connecting portion 11 is deepest at the center of the funnel portion 138a of the plate portion 138. Located in the deepest part 138a1, the straight state is stabilized.

  Therefore, according to the universal joint 1 of the present embodiment, even when the driving side connecting portion 11 and the intermediate connecting portion 13 are inclined within a predetermined range, the convexity of the tip of the spherical head 111 of the driving side connecting portion 11 is increased. The straight state return (holding) force so that the drive side coupling portion 11 and the intermediate coupling portion 13 always return to the straight state by the portion 111b and the inclined surface 138a2 of the funnel portion 138a of the plate portion 138 by the contracted spring 137. Therefore, for example, even before attaching the heavy tool 3 to the operating side connecting portion 12 and performing the work, the driving side connecting portion 11 and the intermediate connecting portion 13 are arbitrarily bent or drooped. This can be prevented.

  Thereby, in the universal joint 1 of this embodiment, even when working with the heavy tool 3 attached in a narrow working space or the like, the space between the drive side connecting portion 11 and the intermediate connecting portion 13 is arbitrary. Work efficiency is improved because it does not bend or hang down.

  In particular, in the universal joint 1 of the present embodiment, when the impact wrench main body 2 or its tool 3 is mounted, the impact wrench main body 2 is subjected to an impact on the tool 3 via the universal joint 1 by compressed air or a slide mechanism. Since rotation or the like is given, the drive-side connecting portion 11 and the intermediate connecting portion 13 are likely to rattle or shake (run), but the straight state return (holding) between the drive-side connecting portion 11 and the intermediate connecting portion 13 is maintained. ) By the force, the universal joint 1 and the tool 3 can be effectively prevented from wobbling.

  Moreover, in the universal joint 1 of this embodiment, it is within a predetermined angle range at two points between the driving side connecting portion 11 and the intermediate connecting portion 13 and between the operating side connecting portion 12 and the intermediate connecting portion 13. Since it has a universal joint (universal joint) function that can be set to a free angle, between the drive side connecting portion 11 and the intermediate connecting portion 13, the tool 3 is mounted on the operating side connecting portion 12. Since not only the weight of the operation side connecting part 12 and the tool 3 but also the weight of the intermediate connecting part 13 is applied, the driving side is more than the universal joint having a general universal joint (universal joint) function. Although the connection part 11 and the intermediate connection part 13 are easily bent or drooped easily, the straight state return (holding) between the drive side connection part 11 and the intermediate connection part 13 of the present embodiment. The ability, it is possible to prevent this. Further, from this point, even when the tool 3 is not attached to the operating side connecting part 12, the driving side connecting part 11 and the intermediate connecting part 13 are easily bent or drooped easily. Then, due to the straight state return (holding) function between the driving side connecting portion 11 and the intermediate connecting portion 13, even when the universal joint 1 is not used, the gap between the driving side connecting portion 11 and the intermediate connecting portion 13 is maintained. Since it does not bend or hang down without permission, the effect that the universal joint 1 is easily organized can be obtained.

  Moreover, in the universal joint 1 of this embodiment, the driving side spherical head insertion hole 131a and the operation side spherical head insertion hole 132a of the intermediate connecting portion 13 are respectively on the same plane and in parallel with the torque transmission pin. Since 133 and 134 are provided, the driving side connecting portion 11 can set a maximum 60 ° angle with respect to the intermediate connecting portion 13 on the same plane, and the operating side connecting portion 12 has a maximum of 60 with respect to the intermediate connecting portion 13. Since the angle can be set, the driving side connecting portion 11 and the operating side connecting portion 12 can set a maximum angle of 120 °, and the angle setting range can be expanded. This is optional, and the torque transmission pins 133 and 134 may of course not be provided on the same plane and in parallel.

  In the universal joint 1 of the present embodiment, as shown in FIGS. 2 to 6, a convex portion 111 b is provided at the tip of the spherical head 111 of the driving side connecting portion 11, and the driving side connecting portion 11 and the intermediate connecting portion are provided. In the present invention, it has been described that it is prevented from being bent or drooped between itself and the present invention. However, the present invention is not limited to this, and a universal joint 1 ′ shown in FIG. A convex portion 121b is provided at the tip of the spherical head portion 121 ′, and the convex portion 121b abuts on the funnel portion 139a of the plate portion 139 urged by the contracted spring 137, so that the working-side coupling portion 12 ′ and the intermediate coupling portion are connected to each other. Of course, it is possible to prevent the portion 13 'from being bent or drooping. In this way, it is possible to prevent the actuating side connecting portion 12 ′ and the intermediate connecting portion 13 ′ from being arbitrarily bent or drooped as much as possible, so that the working efficiency is improved.

  Further, the universal joint 1 shown in FIGS. 2 to 6 and the universal joint 1 ′ shown in FIG. 7 may be combined to form a universal joint 1 ″ as shown in FIG. As shown in FIG. 7, in the universal joint 1 ″, as in the universal joint 1 shown in FIGS. 2 to 6, the convex portion 111b is provided at the tip of the spherical head 111 of the drive side connecting portion 11, while the universal joint 1 shown in FIG. Similarly to ', a convex portion 121b is provided at the tip of the spherical head 121' of the operating side connecting portion 12 ', and the driving side spherical head inserting hole 131a and the operating side spherical head inserting hole 132a of the intermediate connecting portion 13 ". Respectively, a plate portion 138 formed with a conical funnel portion 138a biased by a contracted spring 137, and a conical funnel portion 139. It is also possible to provide a plate portion 139 formed with a two-sided connection between the driving side connecting portion 11 and the operating side connecting portion 12 ′ and the intermediate connecting portion 13 ″. Since it is possible to prevent bending and sagging as much as possible, this universal joint 1 can be used when working with a tool 3 that is heavier in a small working space or by using an impact wrench body 2. Even when an impact or rotation is applied to the tool 3 by compressed air, a slide mechanism, or the like via the screw, the drive connection portion 11 and the intermediate connection portion 13 ″ and the intermediate connection portion 13 ″ and the operation side connection portion 12 ′ Due to the straight state return (holding) force between the drive side connecting portion 11 and the intermediate connecting portion 13 ″, not only between the intermediate connecting portion 13 ″ and the operating side connecting portion 12 ′. The straight return state (holding) force, the deflection of the universal joint 1 and the tool 3 (violent) effectively it becomes possible to suppress, to further improve the working efficiency.

  In the description of the present embodiment, the driving side end 131 and the operating side end 132 of the intermediate connecting portion 13 are respectively provided with a driving side spherical head insertion hole 131a and an operation side spherical head insertion hole 132a. Torque transmission pins 133 and 134 that pass through the driving-side spherical head insertion hole 131a and the operating-side spherical head insertion hole 132a are provided, while the spherical head 111 of the driving-side connecting portion 11 and the spherical head of the operating-side connecting portion 12 are provided. The central portion of each of the portions 121 is a substantially circular hole through which the torque transmission pins 133 and 134 pass, and extends in the axial direction of the intermediate connecting portion 13 as it approaches the upper and lower openings, and is long at the upper and lower openings. Although torque transmission holes 111a and 121a serving as hole-shaped holes are provided to transmit torque, the present invention is not limited to this, and without using torque transmission pins 133 and 134, Driving side spherical head insertion hole 131a and operating side spherical head insertion hole 132a having grooves and gears formed on the peripheral surface, and spherical head 111 of driving side connecting portion 11 having grooves and gears formed on the outer peripheral surface Of course, it is possible to transmit the torque in a rotatable state by connecting the operating side connecting portion 12 to the spherical head 121.

  In the description of the present embodiment, the impact wrench main body 2 is attached to the drive side connecting portion 11 as shown in FIG. 1B. However, the present invention is not limited to this, and FIG. Of course, a manual type ratchet wrench handle 2 'or a manual type torque transmission tool handle such as a T-type wrench may be mounted.

1, 1 ', 1 "universal joint 11, 11' drive side connection part 111, 111 'spherical head 111a torque transmission hole 111b convex part 12, 12' operation side connection part 121, 121 'spherical head 121a torque transmission hole 121b Protruding portion 13, 13 ', 13 "Intermediate connecting portion 131 Driving side end 131a Driving side spherical head insertion hole 131d, 132d Negative groove 132 Operating side end 132a Operating side spherical head insertion hole 133, 134 Torque transmission pin 135, 136 Pin drop prevention ring 137 Spring 138, 138 ', 139 Plate part 138a, 138a', 139a Funnel part 138a1, 138a1 'Deepest part 138a2, 138a2' Inclined surface 2 Impact wrench body 2 'Ratchet wrench handle

Claims (4)

While having a spherical head formed with a torque transmission part on the front end side, a drive side connection part in which a handle is connected to the rear end side,
A tool mounting portion on which the tool is mounted on the front end side, while an operation side coupling portion having a spherical head formed with a torque transmitting portion for transmitting torque on the rear end side;
The spherical head of the driving side connecting portion is inserted into the driving side end portion and has a driving side spherical head insertion hole that engages with the torque transmitting portion, and the operating side end portion of the operating side connecting portion is An intermediate connecting part that has an operating side spherical head insertion hole into which a spherical head is inserted and engages the torque transmitting part, and that transmits torque transmitted from the drive side connecting part to the operating side connecting part;
Have
On the spherical head of the driving side connecting portion, a protruding convex portion is provided,
The drive side spherical head insertion hole of the intermediate connection portion is formed with a conical funnel portion urged by an elastic member that contacts the convex portion of the spherical head of the drive side connection portion. Part is provided,
Universal joint characterized by that. While having a spherical head formed with a torque transmission part on the front end side, a drive side connection part in which a handle is connected to the rear end side,
A tool mounting portion on which the tool is mounted on the front end side, while an operation side coupling portion having a spherical head formed with a torque transmitting portion for transmitting torque on the rear end side;
The spherical head of the driving side connecting portion is inserted into the driving side end portion and has a driving side spherical head insertion hole that engages with the torque transmitting portion, and the operating side end portion of the operating side connecting portion is An intermediate connecting part that has an operating side spherical head insertion hole into which a spherical head is inserted and engages the torque transmitting part, and that transmits torque transmitted from the drive side connecting part to the operating side connecting part; Have
On the spherical head of the operating side connecting portion, a protruding convex portion is provided,
The operation side spherical head insertion hole of the intermediate connection portion is formed with a conical funnel portion urged by an elastic member that is in contact with the convex portion of the spherical head of the operation side connection portion. Part is provided,
Universal joint characterized by that. While having a spherical head formed with a torque transmission part on the front end side, a drive side connection part in which a handle is connected to the rear end side,
A tool mounting portion on which the tool is mounted on the front end side, while an operation side coupling portion having a spherical head formed with a torque transmitting portion for transmitting torque on the rear end side;
The spherical head of the driving side connecting portion is inserted into the driving side end portion and has a driving side spherical head insertion hole that engages with the torque transmitting portion, and the operating side end portion of the operating side connecting portion is An intermediate connecting part that has an operating side spherical head insertion hole into which a spherical head is inserted and engages the torque transmitting part, and that transmits torque transmitted from the drive side connecting part to the operating side connecting part;
Have
While the spherical head of the drive side connecting portion and the spherical head of the operating side connecting portion are respectively provided with protruding convex portions,
The driving-side spherical head insertion hole and the working-side spherical head insertion hole of the intermediate coupling part abut on the convex part of the spherical head of the driving-side coupling part and the working-side coupling part, respectively. A plate portion in which a conical funnel portion urged by an elastic member is formed is provided.
Universal joint characterized by that. In the universal joint according to any one of claims 1 to 3,
A driving side spherical head insertion hole and an operating side spherical head insertion hole, and a driving side spherical head insertion hole and an operating side spherical head, respectively, are provided at the driving side end and the operating side end of the intermediate connecting portion. While a torque transmission pin that penetrates the insertion hole is provided,
In the spherical head of the driving side connecting portion and the spherical head of the operating side connecting portion, respectively,
The central portion is a substantially circular hole through which the torque transmission pin passes, and expands in the axial direction of the intermediate connecting portion as it approaches the upper and lower openings, and becomes an oblong hole in the upper and lower openings, and the torque transmission pin Having a torque transmission hole to be inserted,
The torque transmission pins provided at the driving side end and the operating side end of the intermediate coupling portion are provided on the same plane and in parallel,
Universal joint characterized by that.

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