JP2012051105A - Ratchet wrench - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ratchet wrench comprising a body, a driver, a ratchet device, and a switch for changing directions.SOLUTION: A head part is provided with two limiting grooves connected to a storing hole near a shank part and a sideways receiving hole. The receiving hole is located between the two limiting grooves and periphery of part of the receiving hole is provided inside the two limiting grooves, forming interconnection. A tangential plane is provided on one side surface of a first brake device and a second brake device, has a locking plane formed at a remote end of a pawl, and corresponds to the receiving hole. Periphery of a position fixing part can lock and fix the tangential plane of the first and second brake devices. Rotation of the position fixing part is controlled by a rocking part, thereby the position fixing part presses either one of the two brake devices selectively and separates a driver.

Description

  The present invention relates to a type of ratchet wrench, and more particularly, to a type of ratchet wrench that can prevent tooth collapse due to an inappropriate meshing position of a claw and a tooth portion.

  Reference is made to a ratchet wrench in which the inventor has previously invented a Chinese patent certificate M344945 (patent document 1). The feature is that two brake tools are provided in the two guide grooves, respectively, and the control member is swung so that the pressing surface is pushed into one of the brake tools and at the same time the ratchet is unlocked.

Taiwan Patent Certificate No. M344945

  The aforementioned ratchet wrench has an excellent reputation in the market and is welcomed by consumers. However, the inventor is not satisfied with this, and constantly seeks progress, can improve the meshing effect between the locking member and the ratchet, and in addition to the convenience of operation, the inventor can lock a kind of locking member. The service life of the ratchet wrench can be extended simply by sliding the locking member in the axial direction along the guide groove, thereby providing a better and more practical product for consumers.

  The technical problem to be solved by the present invention provides a kind of ratchet wrench for the drawbacks of the existing techniques described above.

The main object of the present invention is to lock the outer edges on both sides of the position fixing portion of the direction changeover switch to the tangent plane of the first brake tool and the second brake tool, and the first brake tool and the second brake tool by the restriction groove. In order not to rotate, the pawls of the first brake tool and the second brake tool are reliably meshed with the tooth portions of the driving body, thereby preventing the teeth from collapsing due to an inappropriate mesh position between the pawls and the tooth portions.

  The second object of the present invention is that the two restriction grooves and the receiving hole are provided for mounting the two brakes and the direction switching switch, respectively, and there is no space loss inside the main body head portion, so there is no risk that the head portion will break due to high torque. In addition, the structural strength of the head portion is maintained.

It is a three-dimensional external view of the ratchet wrench according to the present invention. FIG. 3 is an exploded view of a ratchet wrench according to the present invention. It is the three-dimensional exploded view by another viewing angle of the ratchet wrench of the present invention. FIG. 4 is a cross-sectional view taken along the line 4-4 shown in FIG. 1 according to the present invention. FIG. 5 is a cross-sectional view taken along line 5-5 shown in FIG. 1 according to the present invention. FIG. 6 is a cross-sectional view taken along the line 6-6 shown in FIG. 5 according to the present invention. FIG. 7 is a cross-sectional view taken along the line 7-7 shown in FIG. 5 according to the present invention. FIG. 8 is a cross-sectional view taken along the line 8-8 shown in FIG. 4 according to the present invention. FIG. 5 is a continuation of FIG. 4 showing the second position of the present invention. FIG. 6 is a continuation of FIG. 5 showing the second position of the present invention. FIG. 8 is a continuation of FIG. 7 showing the second position of the present invention.

  1 to 3, reference is made to the three-dimensional external view and three-dimensional exploded view of a ratchet wrench according to the present invention. The ratchet wrench according to the present invention mainly includes a main body 10, a driving body 20, a ratchet device 30, and a direction changeover switch 40.

  Among them, the main body 10 has a shank portion 11, and the shank portion 11 is formed in an elongated shape to prepare for gripping of the user. A head portion 12 is formed at one end of the shank portion 11, the head portion 12 has a first side surface 121 and a second side surface 122 that face each other, and a receiving hole 13 that penetrates the two side surfaces 121, 122 is provided in the head portion 12. In addition, the receiving hole 13 is provided with a locking portion 131 on the inner edge near the first side surface 121 of the head portion 12, and the receiving hole 13 is provided with a ring-shaped recess 132 and an engaging groove 133 on the second side surface 122 of the head portion 12. The annular recess 132 is formed on the end surface of the head portion 12, and the engagement groove 133 is formed on the inner periphery of the annular recess 132.

  The head portion 12 of the main body 10 is provided with two restriction grooves 14, one notch 15, a receiving hole 16, and a fixing hole 17 in the vicinity of the shank portion 11, and the cross sections of the restriction groove 14 and the receiving hole 16 are as follows. The two restriction grooves 14 and the receiving hole 16 are connected to the receiving hole 13, the extending directions of the openings of the two restriction grooves 14 are separated from each other, and the notch 5 is formed on the first side surface of the head portion 12. The limit locking surfaces 151 are formed on both sides of the notch 15, respectively. A receiving hole 16 and a fixing hole 17 are formed in the notch 15, the receiving hole 16 is located between the two restricting grooves 14, and a part of the outer peripheral edge of the receiving hole 16 communicates inside the two restricting grooves 14. Then, a connecting portion A (FIG. 5) is formed at a place where the receiving hole 16 and the two restricting grooves 14 are connected, and the connecting portion A is located in the restricting groove 14 and the receiving hole 16. The fixing hole 17 is located on the opposite side of the receiving hole 16 from the receiving hole 13, and the fixing hole 17 is provided for mounting the positioning device 18. The positioning device 18 includes a fixing part 181 and an elastic part 182, and the elastic part 182 is provided between the bottom part of the fixing hole 17 and the fixing part 181, and is fixed by elastically applying the fixing part 181 outward. The part 181 is engaged with the direction changeover switch 40.

  The drive body 20 is installed in the accommodation hole 13 of the main body 10 head portion 12, forms a relative rotational relationship, and engages one side surface of the drive body 20 with the engagement portion 131 of the accommodation hole 13. A tooth portion 21 is provided on the outer periphery of the driving body 20, and a swinging portion 22 for swinging the workpiece is provided on the inner periphery of the driving body 20.

  The main body 10 further includes a cap 101 and a retaining ring 102, and includes a recessed groove 103 for hooking the retaining ring 102 on the outer edge of the cap 101, and the retaining ring 102 is formed in the engaging groove 133 of the main body 10 head portion 12. The drive body 20 can be assembled and mounted, and both sides of the drive body 20 are locked and restricted between the locking portion 131 and the cap 101.

  Reference is made to FIGS. The ratchet device 30 includes a first brake tool 31 and a second brake tool 32. The first brake tool 31 and the second brake tool 32 are provided in the two restriction grooves 14, respectively, and the first brake tool 31 and the second brake tool 32 are provided. An elastic part 33 is provided between the tool 32 and the restriction groove 14, and the elastic part 33 can push forward the first brake tool 31 and the second brake tool 32. The first brake tool 31 and the second brake tool 32 can slide in the axial direction along the restriction groove 14.

  A pawl 311 is provided at one end of the first brake tool 31, and the pawl 311 and the tooth portion 21 of the driving body 20 are made to correspond to each other to form an intermeshing relationship. Further, the first brake tool 31 receives the elastic pressure of the elastic portion 33 and meshes the pawl 311 with the tooth portion 21 of the driving body 20. A tangential plane 312 and a guide surface 313 are provided outside the first brake 31, the tangential plane 312 is formed on one side of the first brake 31 opposite to the receiving hole 16, and the tangential plane 312 is formed on the pawl 311. A locking surface 3121 is formed at the far end. Since the first braking tool 31 is formed on the guide surface 313 so as to face the second side surface 122 of the head portion 12, the first braking tool 31 can be fastened to the drive body 20 while avoiding the fastening ring 102. The first braking tool 31 is provided in the limiting groove 14, and the first braking tool 31 is not positioned at the connecting portion A between the limiting groove 14 and the receiving hole 16 due to the tangential plane 312.

  A pawl 321, a tangential plane 322, a guide surface 323, and a locking surface 3221 are provided on the second brake tool 32, and the second brake tool 32 is substantially the same as the first brake tool 31. The second braking tool 32 can be locked in two different rotational directions of the driving body 20. The second braking tool 32 is provided in the limiting groove 14, and the second braking tool 32 is not positioned at the connecting portion A between the limiting groove 14 and the receiving hole 16 due to the tangential plane 322.

  The direction changeover switch 40 includes a position fixing portion 41 and a braking portion 42. The position fixing portion 41 and the braking portion 42 form an L shape, and the position fixing portion 41 is rotatably provided in the receiving hole 16 and fixed in position. A part of outer edges on both sides of the portion 41 are positioned at the connecting portion A between the restriction groove 14 and the receiving hole 16, and the first brake tool 31 and the second brake tool 32 are locked and fixed. A braking portion 42 is provided on the end surface of the notch 15, and the rotation of the position fixing portion 41 is controlled by the braking portion 42, and the braking portion 42 is restricted between the two restricting locking surfaces 151.

  The position fixing part 41 includes a hook part 411, a recessed groove 412, a pressing surface 413, and a locking part 414. The hooking portion 411 has the position fixing portion 41 located at the opposite end of the braking portion 42, the concave groove 412 is provided in the hooking portion 411, and the concave groove 412 is provided for the hooking of the retaining ring 102 and the direction changeover switch 40 is hooked. Set aside to prevent slipping out. In the pressing surface 413 and the locking portion 414, the direction switching switch 40 is formed on the opposite surface of the receiving hole 13, and the pressing surface 413 presses either the first braking tool 31 or the second braking tool 32 by selection, and the driving body. The 20 tooth portions 21 can be pulled apart. The locking portion 414 is located at the connecting portion A between the restriction groove 14 and the receiving hole 16 and can lock and fix the first braking tool 31 and the second braking tool 32.

  The braking portion 42 is attached to the end surface of the notch 15, and two fixing grooves 421 are provided on the bottom surface of the braking portion 42. The two fixing grooves 421 are located on both sides of the bottom surface of the braking portion 42, and the fixing grooves 421 are engaged with the fixing portion 181 of the positioning device 18 so that the direction changeover switch 40 can be fixed at two different switching positions.

  When the direction changeover switch 40 is changed to the first position to the right, the positioning device 18 is fixed to the fixing groove 421 on the left side of the direction changeover switch 40, and the pressing surface 413 of the position fixing portion 41 of the direction changeover switch 40 is the first brake tool. The first brake tool 31 is pulled away from the tooth portion 21 of the drive body 20 by pressing down the locking surface 3121 of 31. At this time, since the driving body 20 is rotated in the clockwise direction of the main body 10, the main body 10 can be swung in the counterclockwise direction, and the workpiece can be swung. The first brake 31 receives the pressure of the pressing surface 413 of the direction changeover switch 40 and is pulled inward from the driver 20. The pawl 311 of the first brake tool 31 is locked to the outer peripheral surface of the position fixing portion 41 by the tangential plane 312 of the first brake tool 31, and the first brake tool 31 cannot rotate on the restriction groove 14. It is possible to aim without deviating the portion 21, and it is possible to prevent tooth collapse due to inappropriate engagement.

  Reference is made to FIGS. When the direction changeover switch 40 is changed to the second position to the left, the positioning device 18 is fixed to the fixing groove 421 on the right side of the direction changeover switch 40, and the second braking tool by the pressing surface 413 of the position fixing portion 41 of the direction changeover switch 40. The second braking tool 32 is pulled away from the tooth portion 21 of the drive body 20 by pressing down the locking surface 3221 of 32. At this time, since the driving body 20 is rotated counterclockwise with respect to the main body 10, the main body 10 can be swung clockwise and the workpiece can be swung. The second brake tool 32 receives the pressure of the pressing surface 413 of the direction changeover switch 40 and is pulled inward from the driver 20. Locked to the outer peripheral surface of the position fixing portion 41 by a tangential plane 322 of the second brake tool 32. Since the second brake tool 32 cannot be rotated by the restriction groove 14, the pawl 321 of the second brake tool 32 can be aimed without deviating from the tooth portion 21 of the drive body 20, and tooth collapse caused by inappropriate engagement is prevented. it can.

DESCRIPTION OF SYMBOLS 10 Main body 11 Shank part 12 Head part 121 1st side surface 122 2nd side surface 13 Accommodating hole 131 Locking part 132 Ring-shaped recessed part 133 Engaging groove 14 Limiting groove 15 Notch 151 Limiting locking surface 16 Receiving hole 17 Fixing hole 18 Positioning device 181 Fixed part 182 Elastic part 101 Cap 102 Retaining ring 103 Recessed groove 20 Drive body 21 Tooth part 22 Oscillating part 30 Ratchet device 31 Pawl 322 Contact plane 3221 Locking surface 323 Guide surface 33 Elastic portion 40 Direction switching switch 41 Position fixing portion 411 Hooking portion 412 Recessed groove 413 Pressing surface 414 Locking portion 42 Brake portion 421 Fixing groove A Connecting portion

Claims (10)

A ratchet wrench comprising a main body, a driving body, a ratchet device, and a direction switching switch,
The main body includes a shank portion and a head portion, the head portion is formed at one end of the shank portion, and a housing hole is provided in the head portion, and the head portion is located near the shank portion in the housing hole. Two restricting grooves that communicate with each other and one lateral receiving hole are provided, the receiving hole is located between the two restricting grooves, and the receiving hole has a part of the outer periphery inside the two restricting grooves. To establish communication with each other,
The drive body is provided in the accommodation hole, a tooth portion is provided on the outer periphery of the drive body, and a swinging portion is provided on the inner periphery.
The ratchet device includes a first brake tool and a second brake tool, and the first brake tool and the second brake tool are provided in the two restriction grooves, respectively, and the first brake tool and the second brake tool are provided. A pawl is provided at one end of the tool, and the pawls of the first brake tool and the second brake tool are meshed with teeth of the drive body of the drive body, and the first brake tool and the second brake tool A tangential plane is provided on one side surface, the tangential plane is formed with a locking surface at a distal end of the pawl, the tangential plane corresponds to the receiving hole, and the first brake tool and the second brake tool are the An elastic part is provided between each of the two restriction grooves,
The direction changeover switch includes a position fixing portion and a braking portion, and the position fixing portion is rotatably provided in the receiving hole, and an outer edge of the position fixing portion is provided between the first braking tool and the second braking tool. It can be locked and fixed to the tangential plane, and the rotation of the position fixing part is controlled by the swinging part, and the position fixing part presses one of the two braking tools by selection, and the driving body is A ratchet wrench configured to pull apart.   The position fixing portion includes a pressing surface and a locking portion, and the pressing surface and the locking portion have the direction switching switch formed on the opposite surface of the receiving hole, and the pressing surface is selected by the first brake tool. Alternatively, the first brake tool and the second brake tool are locked by the locking portion by pressing one of the second brake tools, pulling away the tooth portion of the driving body, and the locking portion. The ratchet wrench according to 1.   The locking portion is provided on the inner periphery of one side surface of the head portion, the receiving hole is provided with a ring-shaped recess and an engagement groove on the second side surface of the head portion, and the engagement groove is formed inside the ring-shaped recess. The main body further includes a cap and a retaining ring, and a recessed groove for engaging the retaining ring is provided on an outer edge of the cap, and the retaining ring is the engagement of the head portion of the main body. The ratchet wrench according to claim 2, wherein the ratchet wrench can be hooked into the groove.   The position fixing portion includes a hook portion and the recessed groove, and the position fixing portion is positioned at the opposite end of the swinging portion, the recessed groove is provided on the hook portion, and the retaining ring is The ratchet wrench according to claim 3, wherein the ratchet wrench is provided in the recessed groove of the position fixing portion.   The head portion further has a fixing hole in the vicinity of the shank portion, the fixing hole is provided for mounting a positioning device, and the bottom surface of the swinging portion is provided with two fixing grooves facing the fixing hole. The ratchet wrench according to claim 1, wherein the positioning device can be elastically fixed to one of the two fixing grooves.   The positioning device includes a fixing portion and an elastic portion, the elastic portion is provided between a bottom portion of the fixing hole and the fixing portion, and the fixing portion is elastically pressed to engage with a fixing groove. The ratchet wrench according to claim 5.   The head portion includes a first side surface and a second side surface, the first side surface of the head portion is provided with a notch in the vicinity of the shank portion, and the notch is formed on an end surface of one side surface and the swinging is performed. 2. The ratchet wrench according to claim 1, wherein a fixed locking surface is provided on both sides of the notch, and the swinging portion is limited to the two fixed locking surfaces in preparation for mounting of the portion.   The first brake tool and the second brake tool may further be provided with a guide surface at a vicinity of the main body, so that the first brake tool and the second brake tool can avoid the retaining ring. Item 4. A ratchet wrench according to item 3.   2. The ratchet wrench according to claim 1, wherein cross sections of the restriction groove and the receiving hole form a circular shape, and extending directions of the openings of the two restriction grooves are separated from each other.   A connecting portion is formed at a location where the receiving hole intersects the two limiting grooves, the connecting portion is located in the limiting groove and the receiving hole, and the first braking tool and the second braking tool are connected to the connecting hole. The ratchet wrench according to claim 1, wherein the ratchet wrench is not positioned at a portion, but a part of the outer periphery of both sides of the position fixing portion is positioned at the two connecting portions.