TWM598209U - Direction controller for a ratchet screw driver - Google Patents

Abstract

A ratchet screw driver includes a holder, a toothed wheel, two pawls, a direction switch and a ring. The toothed wheel, the pawls and the ring are inserted in the holder. The pawls are biased from each other. Each of the pawls includes a boss and a toothed face. The direction switch is connected to the holder, movable between two positions relative to the holder, and formed with two bosses. The ring includes two cutouts and two hooks. The cutouts receive the bosses so that the ring is rotatable with the direction switch. One of the hooks is engaged with the boss of one of the pawls to firmly engage the toothed face of the remaining one of the pawls with the toothed wheel when the ring is moved to one of the positions by the direction switch.

Description

Force application direction control device of ratchet screwdriver

This creation relates to the control technology of the force direction of hand tools, in particular to a force direction control device of a ratchet screwdriver.

Generally, the known screwdriver has a long rod, one end of the long rod forms a driving part, and the driving part has a cross shape for inserting the head of a screw. The other end of the long rod is wrapped by a handle, and the handle drives the driving part to rotate through the long rod. Therefore, the driving part rotates synchronously with the handle, and the screwdriver has no control device for changing the direction of force.

In addition, the ratchet driver is one of the screwdrivers. The ratchet driver disclosed in the Taiwan Announcement No. 155344 uses a rod to insert a sleeve, and the opening of the sleeve is closed by a direction button that covers the rod. A pin passes through the direction button and the rod body, and drives the rod body to rotate relative to the sleeve through the direction button, and a steel ball with elasticity moves in the same direction. The steel ball pushes a bidirectional ratchet block of the rod body to yaw, and then engages or engages a plurality of continuous teeth inside the sleeve to change the direction of force application of the ratchet screwdriver. Therefore, the rod body, the sleeve, the direction button, the pin, the steel ball, the two-way ratchet block and the teeth together form a control device that determines the direction of force application of the ratchet driver.

The Shangkai '344 Patent Case is owned by the applicant. However, the applicant in this case was not complacent, and he still invested time in research and development in related fields, and finally created a new ratchet screwdriver. The main purpose of this creation is to adopt a reasonable mechanical structure to form a new-generation control device and change the direction of force.

Due to the achievement of the above-mentioned purpose, this creation is suitable for the control device of the ratchet screwdriver, including:

A force application direction control device of a ratchet screwdriver, comprising:

A base, the base forms a turntable compartment and a gear compartment along a central axis, the base also has a claw groove, the claw groove is the inscribed circle of the turntable compartment and intersects the gear compartment;

A direction button is connected with the base and seals the opening of the turntable compartment, and the direction button is erected with a set of convex parts;

A gear is placed in the gear compartment of the base, and the gear cooperates with the wall of the base to form the claw groove to form a crescent space with a width in the middle and narrow on both sides;

A turntable is placed in the turntable compartment of the base. The turntable has two notches and a set of hooks. When the set of convex parts are inserted into the notches, the turntable and the steering button maintain a synchronous connection relationship; and

A set of claws is placed in the claw groove of the base. The set of claws is elastic and can move to the narrower side of the crescent space. Each claw has an engagement surface and a rod. , To release the meshing relationship between the corresponding claws biting the gear with the meshing surface.

In this way, the ratchet driver of this creation has a new generation of control device, which not only rationalizes the design of the mechanical structure, but also changes the direction of force of the ratchet driver.

In order to make the above-mentioned objects, features and advantages of this creation more simple and understandable, one or more preferred embodiments are given as follows in detail with the accompanying drawings.

FIG. 1 is a perspective view illustrating that the first embodiment of the ratchet driver 10 has a control device 20, and the control device 20 combines a handle 11 and an operating column 12 together. In this way, a user grips the grip 11 and uses the operating column 12 to lock or loosen a fastener (not shown) such as a screw, bolt or nut.

In this embodiment, the ratchet driver 10 uses a force application portion 14 to lock or loosen the fastener. The force applying portion 14 referred to here generally refers to a hexagonal groove (or hexagonal hole), which sinks into the end of the operating column 12 to receive a nut or bolt head of a similar shape and directly output a ratchet driver A force of 10 (or torque) to the fastener. Alternatively, the force application portion 14 is combined with a tool (not shown in the figure) such as a sleeve, a screwdriver head or a post to indirectly perform the tightening operation of the fastener.

In some embodiments, the force application portion 14 is a hexagonal (or polygonal) column, which extends outward from the end of the operating column 12 along the length direction of the ratchet driver 10, and can be combined with other tools to perform fastener tightening operations .

In the figure, the control device 20 has a direction button 21, and below the direction button 21 is a buckle 13 which is embedded in the exposed part of the operating column 12 to prevent the direction button 21 from leaving the operation along the length of the ratchet driver 10. Column 12. The control device 20 also has a base 30 connected to the direction button 21.

During the locking or unscrewing period, the user operates the direction button 21 to determine whether the operating column 12 and the handle 11 remain fixed, or the operating column 12 rotates in a one-way idling direction relative to the handle 11 and rotates in reverse synchronization. In other words, the control device 20 can change the direction of application of the ratchet driver 10 between the handle 11 and the operating column 12.

FIG. 2 is a combined cross-sectional view showing that the end of the base 30 facing the direction button 21 forms a turntable compartment 35 and can receive a turntable 50. A blocking member 18 like a C buckle is embedded in the wall of the turntable compartment 35 surrounded by the base 30 to prevent the turntable 50 from leaving the turntable compartment 35 of the base 30. Along a central shaft 39 passing through the axis of the turntable compartment 35, a gear groove 34 and a shaft chamber 33 of different diameters are plunged into the base 30, so the shaft chamber 33, the gear groove 34 and the turntable compartment 35 are connected concentric grooves . Wherein, the radius of the gear groove 34 is larger than the radius of the shaft chamber 33 but smaller than the radius of the turntable compartment 35 and is sufficient to accommodate a gear 15. The shaft chamber 33 is deep in the base 30 and is used to receive a shaft 16.

In the figure, the shaft 16 and the operating column 12 are on both sides of the gear 15, and the three are integrated and have the function of rotating in the same direction. In addition, the operating column 12 passes through a circular hole 51 of the turntable 50 and a central hole 22 of the direction button 21. The turntable 50 prevents the gear 15 from leaving the turntable 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 part 31 and the base 30 are designed as a whole and are not at the same end as the direction button 21. When the grip 11 wraps the extension part 31, the control device 20 can receive the force of the grip 11. The claw groove 37 and the blind hole 36 are on both sides of the gear groove 34 for receiving a set of elastic claws 42. Because the claw groove 37 and the gear groove 34 are connected, the set of claws 42 can engage or bite the teeth around the gear 15. The blind hole 36 sinks into the wall of the gear groove 34 surrounded by the base 30, so the blind hole 36 and the gear groove 34 are not connected, but its opening can pass through the turntable compartment 35 to receive a pin 40 with elasticity.

In other words, the direction button 21 cooperates with the base 30 to form a shell, which belongs to the container of the control device 20, and protects the internal system of the control device 20 when the gear 15, the pin 40, the claw 42 and the turntable 50 are combined. .

Figure 3 is a layout diagram, showing that the buckle 13 (see Figure 2) leaves an outer groove 17 of the operating column 12 in the radial direction. At this moment, the direction button 21 leaves the base 30 along the length direction of the operating column 12, and no longer closes the opening of the turntable compartment 35. The ratchet screwdriver 10 performs disassembly work, and the control device 20 is obtained between the separate grip 11 and the operating column 12.

In the figure, the center hole 22 penetrates the center of a platform 23 of the direction button 21. The platform 23 protrudes from the direction button 21 facing the turntable 50. It has a set of convex portions 24 standing on both sides of the central hole 22. The set of convex portions 24 are inserted into the two notches 52 of the turntable 50, so that the direction button 21 can drive the turntable. 50 rotates around the operating column 12 together. Wherein, the convex portion 24 may be a semicircular (or polygonal, circular) short post.

In addition, the blocking member 18 (see FIG. 2) leaves a circle of the inner groove 38 of the base 30 and no longer blocks the turntable 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, and the associated shaft 16 is away from the shaft chamber 33. At the same time, the set of claws 42 leaves the claw groove 37 of the base 30 and is located on one side of the gear 15, and the other side of the gear 15 is a pin 40 that escapes the blind hole 36.

The elasticity of the pin 40 is derived from a compression spring 41. When assembling, the compression spring 41 and the pin 40 are inserted into the blind hole 36 of the base 30. The pin 40 is pushed by the compression spring 41 and partially exposes the blind hole 36. It is pressed against one of the three positioning holes 54 of the turntable 50 to restrict The turntable 50 remains fixed relative to the base 30. These positioning holes 54 penetrate a thin wall 53 of the turntable 50, and the thin wall 53, two notches 52 and a set of hooks 55 are formed around the turntable 50, exactly on the four sides of the circular hole 51. A vertical wall 56 is fan-shaped on one side of the thin wall 53, and the vertical wall 56 cooperates with the pin 40 to limit the rotation angle of the turntable 50 and the direction button 21 around the operating column 12.

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

Then, the elasticity of the set of claws 42 is derived from an elastic member 46, which is like a compression spring and inserts the two ends into a hole 45 of the claw 42 respectively. Each claw 42 has an engaging surface 43 and a rod 44 formed on the side of the claw 42 facing the gear 15. The rod 44 protrudes from the side of the claw 42 and is located between the set of hooks 55.

FIG. 5 is a partial layout 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. In this way, the wall of the base 30 surrounded by the claw groove 37 cooperates with the gear 15 to form a crescent space. The center of the crescent space is wider than the two sides, allowing the elastic member 46 to push the claw 42 to the narrower crescent space. Move sideways.

The set of hooks 55 are biased toward the lower left in FIG. 5 and hook the lever 44 of the upper left pawl 42 to release the engagement or engagement relationship between the pawl 42 and the gear 15. At the same time, the lower left pawl 42 is free, and is pushed by the elastic member 46 to the narrower side of the crescent space, so as to engage or bite the gear 15.

In the figure, the pin 40 clamps the positioning hole 54 so that the turntable 50 remains fixed relative to the base 30. At this moment, the base 30 (ie, the grip) drives the operating column 12 clockwise through the claw 42 on the lower left. On the contrary, the base 30 (ie, the grip) rotates counterclockwise and the operating column 12 does not perform any work.

Figure 6 is an action diagram. Arrow 50A indicates the direction of movement of the direction button. The associated protrusion 24 pushes the wall surrounding the notch 52 to rotate at a certain angle until the pin 40 catches the positioning hole 54 in the middle position.

In the figure, the group of hooks 55 rotate in the turntable compartment 35 and reach the outside of the claw groove 37 and no longer hook any rod 44. At this moment, the set of claws 42 is pushed by the elastic member 46 to move to both sides of the crescent space, respectively engage or bite the gear 15 to restrict the operating column 12 from rotating relative to the base 30.

In other words, the operating column 12 and the base 30 (ie, the grip) maintain a fixed connection relationship.

The operating column 12 rotates in a clockwise direction relative to the base 30 without doing any work, and the claw 42 at the bottom left of the figure is blocked in the reverse direction, causing the operating column 12 to rotate synchronously with the grip.

Fig. 7 is a continuous operation diagram, with arrow 50B indicating the direction in which the direction button continues to rotate. At this moment, the convex portion 24 is matched with the notch 52, so that the turntable 50 rotates with the direction button to a certain angle until the pin 40 clamps the positioning hole 54 on the other side.

The set of hooks 55 is biased toward the upper left in FIG. 7 and hooks the rod 44 of the lower left pawl 42 to release the engagement or engagement relationship between the pawl 42 and the gear 15. Of course, the upper left pawl 42 is free and can be pushed by the elastic member 46 to the narrow corner of the crescent space, thereby engaging or engaging the gear 15. At the same time, the base 30 (ie, the grip) drives the operating column 12 counterclockwise through the claw 42 on the upper left. On the contrary, if the base 30 (ie, the grip) rotates clockwise, the operating column 12 does not perform any work.

Figure 8 is a perspective view showing the second embodiment of the turntable 50. In the figure, the structure of the turntable 50 is substantially the same as that of the first embodiment, and can be installed on the same ratchet driver. The difference between the turntable 50 of the second embodiment is:

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

Secondly, the thin wall 53 forms a set of bead grooves 54' (or blind holes), and each bead groove 54' receives a bead 40' pushed by the compression spring 41, which can also have a positioning effect on the turntable 50 .

Furthermore, the thin wall 53' and the set of hooks 55 are designed as a whole, and there is a certain height difference between the hook 55 and the thin wall 53'. Regardless of whether the hook 55 hooks to the rod 44 of the claw 42 (refer to Figures 5-7), the thin wall 53' has a shielding and sealing effect on the rod 44, so that the hook 55 can smoothly hook the claw 42 or release it The hooking relationship between the two.

10: Ratchet screwdriver

11: Grip

12: Operation column

13: Buckle

14: force department

15: Gear

16: axis

17: Outer groove

18: blocking piece

20: Control device

21: Direction button

22: Center hole

23: platform

24: convex

30: Pedestal

31: Extension

32: Flat section

33: Shaft Room

34: gear groove

35: Turntable cabin

36: blind hole

37: claw groove

38: Inner groove

39: central axis

40: pin

40': Bead

41: Compression spring

42: Claw

43: Meshing surface

44: Rod

45: hole

46: Elastic

50: turntable

51: round hole

52: gap

53, 53': thin wall

54: positioning hole

54': bead groove

55: hook

56: Wall

50A, 50B: Arrow

Figure 1 is a combined perspective view of the first embodiment of the ratchet driver of the invention; Figure 2 is a partial sectional view of the ratchet driver; Figure 3 is a configuration diagram of the control device; Figure 4 is an exploded perspective view of the control device; Figures 5-7 are continuous action diagrams of the control device changing the direction of the ratchet driver; and Figure 8 is a perspective view of the second embodiment of the turntable.

11: Grip

12: Operation column

15: Gear

16: axis

17: Outer groove

20: Control device

21: Direction button

22: Center hole

23: platform

24: convex

30: Pedestal

31: Extension

33: Shaft Room

34: gear groove

35: Turntable cabin

36: blind hole

37: claw groove

38: Inner groove

40: pin

41: Compression spring

42: Claw

43: Meshing surface

50: turntable

51: round hole

52: gap

53: thin wall

54: positioning hole

55: hook

Claims (10)

A force application direction control device of a ratchet screwdriver, comprising: a base (30), the base (30) along a central axis (39) to form a connected turntable compartment (35) and a gear groove (34), The base (30) also has a claw groove (37), which is the inscribed circle of the turntable compartment (35) and intersects the gear compartment (34); a direction button (21) and the base ( 30) Connecting and sealing the opening of the turntable compartment (35), the direction button (21) has a set of protrusions (24); a gear (15) is placed in the gear groove (34) of the base (30), the gear (15) The wall of the claw groove (37) enclosed by the base (30) forms a crescent space with a wide middle and narrow sides; a turntable (50) is placed in the turntable compartment (35) of the base (30), The turntable (50) has two notches (52) and a set of hooks (55). When the set of convex portions (24) are inserted into the notches (52), the turntable (50) and the direction button (21) maintain synchronous rotation Connection relationship; and a set of claws (42) placed in the claw groove (37) of the base (30), the group of claws (42) are elastic and can move to the narrow side of the crescent space, each claw (42) ) Has a meshing surface (43) and a rod (44). When one of the hooks (55) hooks the rod (44), the corresponding claw (42) is released and the meshing surface (43) bites the gear (15). )’S engagement relationship. For example, the force application direction control device of the ratchet screwdriver described in the first item of the patent application, wherein the base (30) also has a blind hole (36), and the blind hole (36) receives a pin (40). The pin (40) has elasticity and can partially expose the blind hole (36) to clamp one of the multiple positioning holes (54) of the turntable (50). For example, the force application direction control device of the ratchet screwdriver described in the scope of the patent application, wherein the positioning holes (54) penetrate a thin wall (53) of the turntable (50), and the thin wall (53) is connected to a fan on one side The designed vertical wall (56) is matched with the pin (40) to limit the rotation angle of the turntable (50) and the direction button (21). For example, the force application direction control device of the ratchet screwdriver described in item 1 of the scope of patent application, wherein the base (30) also has a blind hole (36), and the blind hole (36) receives a bead (40'), The bead body (40') has elasticity and can partially expose the blind hole (36), and it can catch one of the bead grooves (54') of the turntable (50). As described in item 4 of the scope of patent application, the force application direction control device of the ratchet screwdriver, wherein the bead grooves (54') penetrate a thin wall (53) of the turntable (50), and the thin wall (53) is connected to one side A vertical wall (56) with a fan-shaped design, the vertical wall (56) cooperates with a bead (40') to limit the rotation angle of the turntable (50) and the direction button (21). For example, the force application direction control device of the ratchet screwdriver described in item 3 or 5 of the scope of patent application, wherein the number of the thin walls (53, 53') is two, and these thin walls (53, 53') and two notches ( 52) On the four sides of the turntable (50), one of the thin walls (53') and the group of hooks (55) are designed as a whole, and there is a certain height difference between the hook (55) and the thin walls (53'). As described in the second item of the scope of patent application, the force application direction control device of the ratchet screwdriver, wherein a blocking member (18) is embedded in the base (30) to form a wall of the turntable compartment (35) to prevent the turntable (50) from leaving the base (30) Turntable compartment (35). For example, the force application direction control device of the ratchet screwdriver described in the scope of the patent application, wherein the base (30) also has a shaft chamber (33), and the shaft chamber (33) leads to the gear groove (34) Concentric groove; an operating column (12) and a shaft (16) on both sides of the gear (15), the shaft (16) is placed in the shaft chamber (33), the operating column (12) extends through the turntable (50) Exit the direction button (21). For example, the force application direction control device of the ratchet screwdriver described in item 5 of the scope of patent application, wherein a buckle (13) is embedded in the exposed part of the operating column (12) and prevents the direction button (21) from leaving the base (30). For example, the force application direction control device of the ratchet screwdriver described in any one of items 1 to 5 of the scope of patent application, wherein the base (30) also has an extension (31), and the extension (31) is A grip (11) is wrapped.

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