CN212421095U - Force application direction control device of ratchet screwdriver - Google Patents

Abstract

The utility model provides a force application direction control device of ratchet bottle opener, include: the base is provided with a claw groove which is an inscribed circle of the turntable cabin and is intersected with the gear groove; a direction button is connected with the base and seals the opening of the rotary table cabin, and a group of convex parts are erected on the direction button; a gear is placed in a gear groove of the base and matched with the wall of the claw groove surrounded by the base to form a crescent space with a wide middle part and narrow two sides; a rotary table is arranged in the rotary table cabin of the base and is provided with two notches and a group of hooks, and when the group of convex parts are inserted into the notches, the rotary table and the direction button maintain the synchronous rotating connection relationship; and a set of claws are arranged in the claw grooves of the base, the set of claws have elasticity and can move to two sides with narrower crescent space, each claw has an engaging surface and a rod, and when one of the set of hooks the rod, the engaging relation that the corresponding claw bites the gear by the engaging surface is released.

Description

Force application direction control device of ratchet screwdriver

Technical Field

The present invention relates to a control technique for force application direction of hand tool, and more particularly to a force application direction control device for ratchet screwdriver.

Background

Generally, known screwdrivers have an elongated rod, one end of which forms a driving portion provided with a cross-shaped profile for inserting the head of a screw. The other end of the long rod is wrapped by a grip, and the grip drives the driving part to rotate through the long rod. Therefore, the driving part and the handle rotate synchronously, and the screwdriver does not have a control device for changing the force application direction.

In addition, a ratchet driver belongs to one of screwdrivers. Taiwan patent No. 155344 discloses a ratchet screwdriver, which is inserted into a sleeve by a rod, and the opening of the sleeve is closed by a direction button sleeved on the rod. A round pin passes through direction button and the body of rod, drives the relative sleeve rotation of the body of rod through the direction button, and it has elastic steel ball syntropy displacement to link. The steel ball pushes one bidirectional ratchet block of the rod body to swing, so that a plurality of continuous teeth on the inner side of the sleeve are meshed or engaged, and the force application direction of the ratchet screwdriver is changed. Therefore, the rod body, the sleeve, the direction button, the pin, the steel ball, the bidirectional ratchet block and the teeth form a control device together to determine the force application direction of the ratchet screwdriver.

SUMMERY OF THE UTILITY MODEL

The' 344 patent is owned by the applicant. However, the applicant is not full of time and still invests time to research and develop related fields, and finally a new ratchet screwdriver is put into practical use. The utility model discloses main aim at: a reasonable mechanical structure is adopted to form a new generation of control device, and the direction of the force application is changed.

In view of the above, the present invention provides a force application direction control device for a ratchet driver, comprising:

the base is provided with a claw groove which is an inscribed circle of the turntable cabin and is intersected with the gear groove;

a direction button is connected with the base and seals the opening of the rotary table cabin, and the direction button stands on a group of convex parts;

a gear is arranged in a gear groove of the base, and the gear is matched with the wall of the claw groove formed by the surrounding of the base to form a crescent space with a wide middle part and narrow two sides;

a rotary plate is arranged in the rotary plate cabin of the base, the rotary plate is provided with two notches and a group of hooks, and when the group of convex parts are inserted into the notches, the rotary plate and the direction button maintain the synchronous rotating connection relationship; and

a set of claws is arranged in the claw grooves of the base, the claws are elastic and can move to two sides with narrower crescent space, each claw has an engaging surface and a rod, and when one of the hooks the rod, the engaging relation of the corresponding claw with the engaging surface for engaging the gear is released.

The force application direction control device of the ratchet screwdriver is characterized in that the base is further provided with a blind hole, the blind hole receives a pin, and the pin is elastic and can be partially exposed out of the blind hole to clamp one of a plurality of positioning holes of the rotary disc.

The force application direction control device of the ratchet screwdriver is characterized in that the plurality of positioning holes penetrate through a thin wall of the rotary table, a fan-shaped vertical wall is connected with a single surface of the thin wall, and the vertical wall is matched with the pin to limit the rotation angle of the rotary table and the direction knob.

The force application direction control device of the ratchet screwdriver is characterized in that the base is further provided with a blind hole, the blind hole receives a ball body, and the ball body is elastic and can be partially exposed out of the blind hole to clamp one of the ball grooves of the rotary table.

The force application direction control device of the ratchet screwdriver is characterized in that the plurality of ball grooves penetrate through a thin wall of the rotary disc, a fan-shaped vertical wall is connected with a single surface of the thin wall, and the vertical wall is matched with the ball body to limit the rotation angle of the rotary disc and the direction knob.

Or the force application direction control device of the ratchet screwdriver, wherein the number of the thin walls is two, the two thin walls and the two gaps are arranged on the four sides of the turntable, one thin wall and the group of hooks are designed into a whole, and a certain height drop exists between the hooks and the thin walls.

The force application direction control device of the ratchet screwdriver is characterized in that a blocking piece is embedded into the wall of the base surrounding the turntable cabin to prevent the turntable from leaving the turntable cabin of the base.

The force application direction control device of the ratchet screwdriver, wherein the base is also provided with a shaft chamber which is a concentric groove leading to the gear groove;

an operating column and a shaft are arranged on two sides of the gear, the shaft is arranged in the shaft chamber, and the operating column passes through the rotating disc and extends out of the direction button.

In the force application direction control device of the ratchet screwdriver, a retaining ring is embedded in the exposed part of the operating column and prevents the direction button from leaving the base.

The force application direction control device of the ratchet screwdriver is characterized in that the base is also provided with an extension part which is wrapped by a handle.

Therefore, the utility model discloses a ratchet bottle opener possesses new generation's controlling means, and not only mechanical structure's design is rationalized, can also change the application of force direction of ratchet bottle opener.

To further clarify the objects, features and advantages of the present invention, one or more preferred embodiments will be described in detail below with reference to the accompanying drawings.

Drawings

Fig. 1 is an assembled perspective view of a first embodiment of the ratchet driver of the present invention;

FIG. 2 is an assembled cross-sectional view of a portion of the ratchet driver;

fig. 3 is a configuration diagram of the control device;

FIG. 4 is an exploded perspective view of the control device;

FIGS. 5-7 are diagrams of successive actions of the control device to change the direction of application of force by the ratchet driver;

fig. 8 is a perspective view of a second embodiment of the turntable.

Description of reference numerals: a ratchet driver 10; a grip 11; an operation column 12; a retaining ring 13; a force application part 14; a gear 15; a shaft 16; an outer groove 17; a stopper 18; a control device 20; a direction knob 21; a central bore 22; a platform 23; a convex portion 24; a base 30; an extension 31; a flattened section 32; a shaft chamber 33; a gear groove 34; a turntable compartment 35; a blind hole 36; the claw grooves 37; an inner groove 38; a central shaft 39; a pin 40; a bead 40'; a compression spring 41; a claw 42; an engaging surface 43; a rod 44; an aperture 45; an elastic member 46; a turntable 50; a circular hole 51; a notch 52; thin walls 53, 53'; positioning holes 54; bead grooves 54'; a hook 55; a vertical wall 56; arrows 50A, 50B.

Detailed Description

Fig. 1 is a perspective view illustrating a first embodiment of the ratchet driver 10 having a control device 20, said control device 20 combining a grip 11 with an operating column 12. Thus, a user grips the grip 11 and performs a tightening or loosening operation on a fastening member (not shown) such as a screw, a bolt or a nut through the operation post 12.

In this embodiment, the ratchet driver 10 is used to lock or loosen a fastener by a force application portion 14. Force application portion 14, as referred to herein, broadly refers to a hex socket recessed into the end of handle post 12 for receiving the head of a similarly shaped nut or bolt for directly outputting a force (or torque) from ratchet driver 10 to a fastener. Alternatively, the force application portion 14 may be coupled to a tool (not shown) such as a socket, driver bit or extension rod to indirectly perform the tightening or loosening operation of the fastener.

In some embodiments, the force application portion 14 is a hexagonal (or polygonal) post extending outwardly from the end of the handle 12 along the length of the ratchet driver 10 for engaging and loosening fasteners in combination with other tools.

In the figure, the control device 20 has a direction button 21, and a retaining ring 13 is arranged below the direction button 21, and the retaining ring 13 is embedded into the exposed part of the operation column 12 to prevent the direction button 21 from leaving the operation column 12 along the length direction of the ratchet driver 10. The control device 20 also has a base 30, the base 30 being connected to the direction knob 21.

During the locking or loosening process, the user operates the direction button 21 to determine whether the operation post 12 and the grip 11 are kept stationary or the operation post 12 is idle in one direction relative to the grip 11 and does not work and rotates in reverse synchronously. In other words, the control device 20 can change the direction of the urging force of the ratchet driver 10 between the grip 11 and the operation pole 12.

Fig. 2 is an assembled cross-sectional view showing that the end of the base 30 facing the direction knob 21 forms a turntable compartment 35 to receive a turntable 50. A blocking member 18, like a C-clip, is embedded in the wall of the base 30 surrounding the turntable compartment 35 to prevent the turntable 50 from moving away from the turntable compartment 35 of the base 30. A gear groove 34 and a shaft chamber 33 of different diameters are sunk into the base 30 along a central shaft 39 passing through the axis of the turntable chamber 35, so that the shaft chamber 33, the gear groove 34 and the turntable chamber 35 are communicated concentric grooves. Wherein the gear slot 34 has a radius greater than the radius of the shaft chamber 33 but less than the radius of the carousel compartment 35 sufficient to accommodate one gear 15. The shaft chamber 33 is located deep within the base 30 for receiving a shaft 16.

In the figure, the shaft 16 and the operation column 12 are integrated on both sides of the gear 15, and have the function of rotating in the same direction. In addition, the operating column 12 passes through a circular hole 51 of the dial 50 and a central hole 22 of the direction knob 21, and the dial 50 prevents the gear 15 from leaving the dial compartment 35 of the base 30.

In addition, the base 30 has an extension 31, a blind hole 36 and a claw groove 37. The extension 31 is integrally formed with the base 30 and is not located at the same end as the direction knob 21, and the control device 20 can receive the force of the handle 11 when the handle 11 is wrapped around the extension 31. The pawl slot 37 and the blind hole 36 are located on either side of the gear slot 34 for receiving a set of resilient pawls 42. Because the pawl slot 37 and the gear slot 34 are in communication, the set of pawls 42 can engage or bite into the teeth around the gear 15. The blind hole 36 is recessed into the wall of the base 30 surrounding the gear slot 34 so that the blind hole 36 is not in communication with the gear slot 34 but opens to pass through the turret compartment 35 for receiving a flexible pin 40.

In other words, the direction knob 21 cooperates with the base 30 to form a housing belonging to the container of the control device 20, providing protection for the gear 15, the pin 40, the pawl 42 and the dial 50 in combination with an internal system belonging to the control device 20.

FIG. 3 is a layout view showing the retaining ring 13 (see FIG. 2) radially spaced from an outer groove 17 of the operating post 12. At this point, the direction knob 21 is moved away from the base 30 along the length of the operating column 12, no longer closing the opening of the turret compartment 35. The ratchet driver 10 is detached to obtain the control device 20 from between the separated grip 11 and the operation post 12.

In the figure, the central hole 22 runs through the center of a platform 23 of the directional knob 21. The platform 23 is raised from the direction button 21 facing the rotary plate 50, and has a set of protrusions 24 standing on both sides of the central hole 22, and the set of protrusions 24 are inserted into the two notches 52 of the rotary plate 50, so that the direction button 21 can drive the rotary plate 50 to rotate around the operation post 12. Wherein, the convex portion 24 may be a semi-circular (or polygonal, circular) short column.

In addition, the blocking member 18 (see fig. 2) moves away from the inner groove 38 of the base 30 and no longer blocks the disk 50. When the turntable 50 is separated from the turntable compartment 35 of the base 30, the gear 15 leaves the gear groove 34 of the base 30, with the shaft 16 away from the shaft chamber 33. At the same time, the set of pawls 42 are positioned away from the pawl slot 37 of the base 30 on one side of the gear 15, and the other side of the gear 15 is the pin 40 that is disengaged from the blind hole 36.

The elasticity of the pin 40 is derived from a compression spring 41. During assembly, the compression spring 41 is inserted into the blind hole 36 of the base 30 together with the pin 40, and the pin 40 is pushed by the compression spring 41 and partially exposed out of the blind hole 36, and abuts against one of the three positioning holes 54 of the turntable 50 to limit the turntable 50 from being fixed relative to the base 30. The positioning holes 54 penetrate through a thin wall 53 of the rotating disc 50, and the thin wall 53, the two notches 52 and the set of hooks 55 are formed around the rotating disc 50 just at the four sides of the circular hole 51. A vertical wall 56 is erected on one side of the thin wall 53 in a fan shape, and the vertical wall 56 cooperates with the pin 40 to limit the angle of rotation of the rotary plate 50 and the direction knob 21 around the operation column 12.

Fig. 4 is an exploded view showing that the extension 31 has a flat 32, and the flat 32 can prevent the extension 31 and the grip 11 from rotating relative to each other and transmit the force of the grip 11 to the base 30. Of course, the extension 31 is designed to have other geometric shapes, which can output the force (or torque) of the handle 11 to the control device 20.

Then, the elasticity of the set of claws 42 is derived from an elastic member 46 which, like a compression spring, inserts both ends into a hole 45 of the claw 42, respectively. Each jaw 42 has an engagement surface 43 and a stem 44, said engagement surface 43 being formed on the side of the jaw 42 facing the gear wheel 15, the stem 44 protruding from the side of the jaw 42 and being located between the set of hooks 55.

Fig. 5 is a partial configuration diagram of the control device 20, showing that the claw groove 37 is an inscribed circle of the turntable compartment 35 and intersects the gear groove 34. Thus, the wall of the base 30 enclosing the claw groove 37 forms a crescent space with a wider center than both sides in cooperation with the gear 15, allowing the elastic member 46 to push the claw 42 to move toward both sides of the narrower crescent space.

The pair of hooks 55 is biased to the lower left in fig. 5, and hooks the rod 44 of the upper left pawl 42 to release the engagement or meshing relationship between the pawl 42 and the gear 15. At the same time, the lower left pawl 42 is free, and is pushed toward the narrower side of the crescent space by the elastic member 46, thereby engaging or biting the gear 15.

In the figures, the pin 40 engages the alignment hole 54, so that the turntable 50 remains stationary relative to the base 30. At this point, the base 30 (i.e., the grip) drives the operating post 12 clockwise via the lower left jaw 42. Conversely, the base 30 (i.e., the handle) idles counterclockwise and the operating column 12 does not perform work.

Fig. 6 is an action diagram showing the direction of movement of the directional knob by arrow 50A, with the protrusion 24 pushing the dial 50 angularly about the wall of the gap 52 until the pin 40 engages the centrally located detent 54.

In the figure, the set of hooks 55 are rotated in the turret compartment 35 to reach outside the claw grooves 37 and no longer catch on any of the bars 44. At this point, the set of pawls 42 are urged by the resilient members 46 to displace toward either side of the crescent space, engaging or meshing with the gears 15, respectively, to restrict the column 12 from rotating relative to the base 30.

In other words, the operating post 12 is fixedly coupled to the base 30 (i.e., the grip).

The operation column 12 does not work in the clockwise idle rotation relative to the base 30, and the claw 42 at the lower left of the drawing is blocked in the reverse direction, so that the operation column 12 and the grip rotate synchronously.

Fig. 7 is a continuous action diagram with arrow 50B indicating the direction of continued rotation of the directional knob. At this point, the protrusion 24 engages the notch 52, causing the dial 50 to rotate with the directional knob through a certain angle until the pin 40 engages the other side of the alignment hole 54.

The pair of hooks 55 are biased to the upper left in fig. 7, and hook the rod 44 of the lower left pawl 42, thereby releasing the engagement or meshing relationship between the pawl 42 and the gear 15. Of course, the upper left pawl 42 is free and can be pushed by the resilient member 46 toward the narrower corner of the crescent space to engage or mesh with the gear 15. At the same time, the base 30 (i.e., the handle) moves the operating column 12 counterclockwise via the upper left-hand pawl 42. Conversely, the base 30 (i.e., the handle) is free running clockwise, and the operating column 12 does not perform work.

Fig. 8 is a perspective view showing a second embodiment of the turntable 50. In the drawings, the structure of the rotary plate 50 is substantially the same as that of the first embodiment, and the rotary plate can be mounted on the same ratchet driver. The turntable 50 of the two embodiments differs in that:

first, the number of the thin walls 53, 53' is two. These thin walls 53, 53' and the two notches 52 are on the four sides of the turntable 50.

Secondly, said wall 53 defines a set of beads 54' (or blind holes), each bead 54' receiving a bead 40' pushed by the compression spring 41, also having a positioning effect on the carousel 50.

Furthermore, the thin wall 53 'is designed as one body with the group of hooks 55, and the hooks 55 and the thin wall 53' have a certain height difference. Regardless of whether the hook 55 is hooked to the rod 44 of the claw 42 (see fig. 5 to 7), the thin wall 53' has a shielding closing function for the rod 44, so that the hook 55 can be smoothly hooked to the claw 42 or the hooking relationship between the hook and the claw is released.

Claims (10)

1. A force application direction control device of a ratchet driver is characterized by comprising:

a base (30), the base (30) forming a carousel compartment (35) and a gear slot (34) in communication along a central axis (39), the base (30) further having a pawl slot (37), the pawl slot (37) being an inscribed circle of the carousel compartment (35) and intersecting the gear slot (34);

a direction button (21) is connected with the base (30) and seals the opening of the turntable cabin (35), and a group of convex parts (24) stand on the direction button (21);

a gear (15) is arranged in a gear groove (34) of the base (30), and the gear (15) is matched with the wall of the base (30) to enclose a claw groove (37) to form a crescent space with a wide middle and narrow two sides;

a rotary plate (50) is arranged in the rotary plate chamber (35) of the base (30), the rotary plate (50) is provided with two notches (52) and a group of hooks (55), and when the group of convex parts (24) are inserted into the notches (52), the rotary plate (50) and the direction knob (21) maintain the synchronous rotating connection relationship; and

a set of claws (42) is placed in the claw grooves (37) of the base (30), the set of claws (42) is provided with elasticity and can move to two sides with narrow crescent space, each claw (42) is provided with an engaging surface (43) and a rod (44), and when one of the set of hooks (55) hooks the rod (44), the engaging relation of the corresponding claw (42) with the engaging surface (43) to the gear (15) is released.

2. The force application direction control device for a ratchet driver as claimed in claim 1, wherein said base (30) further has a blind hole (36), said blind hole (36) receiving a pin (40), said pin (40) having elasticity to partially expose said blind hole (36) to catch one of said plurality of positioning holes (54) of said rotary plate (50).

3. The force application direction control device of a ratchet driver as claimed in claim 2, wherein the plurality of positioning holes (54) penetrate a thin wall (53) of the rotary plate (50), the thin wall (53) is engaged with a sector-shaped standing wall (56) on one side, and the standing wall (56) cooperates with the pin (40) to limit the rotation angle of the rotary plate (50) and the direction knob (21).

4. The force application direction control device for a ratchet driver as claimed in claim 1, wherein said base (30) further has a blind hole (36), said blind hole (36) receiving a ball (40'), said ball (40') being resilient to partially expose said blind hole (36) for engaging one of a plurality of ball grooves (54') of said rotary plate (50).

5. The force application direction control device of a ratchet driver as claimed in claim 4, wherein the plurality of ball grooves (54') penetrate a thin wall (53) of the rotary plate (50), the thin wall (53) is engaged with a sector-shaped standing wall (56) on one side, and the standing wall (56) cooperates with the ball body (40') to limit the rotation angle of the rotary plate (50) and the direction knob (21).

6. The force application direction control device of a ratchet driver as claimed in claim 3 or 5, wherein the number of the thin wall (53, 53') is two, two thin walls (53, 53') and two notches (52) are provided on four sides of the rotary plate (50), one of the thin walls (53') is integrally formed with the set of hooks (55), and the hooks (55) and the thin walls (53') have a height difference.

7. The force applying direction control device of a ratchet driver as claimed in claim 2, wherein a stopper (18) is embedded in a wall of the base (30) surrounding the turntable compartment (35) to prevent the turntable (50) from leaving the turntable compartment (35) of the base (30).

8. The force application direction control device of a ratchet driver as claimed in claim 1, wherein the base (30) further has a shaft chamber (33), the shaft chamber (33) being a concentric groove leading to the gear groove (34);

an operating column (12) and a shaft (16) are arranged on two sides of the gear (15), the shaft (16) is arranged in the shaft chamber (33), and the operating column (12) passes through the rotating disc (50) and extends out of the direction button (21).

9. The force applying direction control device of a ratchet driver as claimed in claim 5, wherein a retaining ring (13) is fitted into the exposed portion of the operating rod (12) and prevents the direction knob (21) from coming off the base (30).

10. The force application direction control device of a ratchet driver as claimed in any one of claims 1 to 5, wherein the base (30) further has an extension portion (31), the extension portion (31) being enclosed by a grip (11).

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