A two-way ratchet screwdriver

Abstract

The invention discloses a bidirectional ratchet screwdriver, comprising a handle, a main shaft acting on a working end, a ratchet seat and a reversing seat, wherein the ratchet seat is sleeved outside the main shaft and can drive the main shaft to rotate synchronously, an upper ratchet head and a lower ratchet head are respectively installed at both ends of the ratchet seat, the upper ratchet head and the lower ratchet head have the same structure and are fixedly connected to the handle, the upper ratchet head is provided with a circle of face gear teeth and a circle of ratchet teeth, the face gear teeth of the upper ratchet head and the face gear teeth of the lower ratchet head are connected by a pinion, at least one group of positive pawls and reverse pawls passing through the ratchet seat are installed on the outer periphery of the reversing seat, and the positive pawls or reverse pawls can be driven to act on the ratchet teeth of the upper ratchet head and the lower ratchet head by turning the reversing seat to rotate, and the rotating positive pawls and reverse pawls drive the main shaft to rotate through the ratchet seat. A new structure is designed to realize the bidirectional work of the screwdriver.

Description

Technical Field

[0001] The invention relates to a screwdriver, in particular to a bidirectional ratchet screwdriver. Background Art

[0002] A screwdriver is a tool used to tighten and drive screws. In the prior art, screwdrivers used to install and remove screws are generally hand-tightening screwdrivers. Since the rotation of the hand has a certain limit and cannot be rotated in one direction all the time, when using this type of tool, the hand generally rotates the tool handle in a desired direction, then rotates the hand in the opposite direction, and then repositions the tool to enter the next cycle. The reverse rotation of the hand is to release the tool handle and then hold it again, so that the spindle does not move when the handle is reversed, or to detach the handheld tool from the screw and then reinsert the screw to rotate, making the entire rotation process inconvenient.

[0003] Therefore, a one-way device such as a ratchet mechanism is now provided in the tool, which is called a ratchet screwdriver. This structure allows the user's hand to not be separated from the screwdriver handle, and the screwdriver does not need to be separated from the screw and then reinserted into the screw to rotate. However, the ratchet screwdrivers in the prior art generally adopt a ratchet one-way transmission structure, and such ratchet screwdrivers can only tighten the screw in a single direction, and cannot tighten the screw in the reverse direction.

[0004] The present invention relates to a bidirectional ratchet screwdriver which can realize the rotation of screws in different directions, thus realizing a collection of functions. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a bidirectional ratchet screwdriver, and a new structure is designed to realize the bidirectional operation of the screwdriver.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a bidirectional ratchet screwdriver, comprising a handle, a main shaft acting on a working end, a ratchet seat and a reversing seat, the ratchet seat is sleeved outside the main shaft and can drive the main shaft to rotate synchronously, an upper ratchet head and a lower ratchet head are respectively installed at both ends of the ratchet seat, the upper ratchet head and the lower ratchet head have the same structure and are fixedly connected to the handle, the upper ratchet head is provided with a circle of face gear teeth and a circle of ratchet teeth, the face gear teeth of the upper ratchet head and the face gear teeth of the lower ratchet head are connected by small The gears are connected, and the rotation of the upper ratchet head drives the lower ratchet head to rotate in the opposite direction. The outer periphery of the reversing seat is equipped with at least one group of forward pawls and reverse pawls passing through the ratchet seat. The forward pawl or the reverse pawl can be driven to act on the ratchet teeth of the upper ratchet head and the lower ratchet head by turning the reversing seat. The upper ratchet head only drives the forward pawl to rotate forward or the reverse pawl to reverse, and the lower ratchet head drives the forward pawl to reverse or the reverse pawl to rotate forward. The rotating forward pawl and reverse pawl drive the main shaft to rotate through the ratchet seat.

[0007] A further preferred solution of the present invention is that the reversing seat sleeve is arranged outside the main shaft, and the main shaft can rotate freely in the reversing seat, and the reversing seat is connected to the reversing button, and turning the reversing button will drive the reversing seat to rotate forward or reverse.

[0008] A further preferred solution of the present invention is that the surface of the reversing seat is provided with a positive notch and a negative notch of a parallelogram structure, and the end walls of the positive notch and the negative notch are inclined surfaces and the inclination directions of the two are opposite.

[0009] The ratchet seat surface is provided with a channel along the axial direction, the forward pawl and the reverse pawl pass through the channel and can only move along the channel, and the rotation of the reversing seat will drive the forward pawl and the reverse pawl to move axially along the channel.

[0010] A further preferred solution of the present invention is that the positive pawl and the reverse pawl are in a long and narrow parallelogram structure, and the ends of the positive pawl and the reverse pawl are inclined surfaces and the inclination directions of the two are opposite.

[0011] A further preferred embodiment of the present invention is as follows: the positive pawl is installed in the positive slot, the reverse pawl is installed in the reverse slot, the end of the positive pawl is in the same inclination direction as the end wall of the positive slot, and the end of the reverse pawl is in the same inclination direction as the end wall of the reverse slot.

[0012] A further preferred embodiment of the present invention: the forward pawl and the reverse pawl are both composed of claw pieces connected by two springs, a protrusion is arranged on the inner side of the claw piece, the claw piece is installed in the positive slot or the reverse slot through the protrusion, the spring is in a compressed state, and the spring drives the protrusion to be close to the end wall of the positive slot or the reverse slot.

[0013] A further preferred solution of the present invention is that a gear seat is disposed on the middle of the ratchet seat, pinions are installed on both sides of the gear seat, the pinions are arranged perpendicular to the upper ratchet head and the lower ratchet head, and the pinions connect the upper ratchet head and the lower ratchet head.

[0014] A further preferred solution of the present invention is that the upper ratchet head is in a cylindrical structure, the outer end surface of the upper ratchet head is provided with a circle of surface gear teeth, and the inner bottom surface of the upper ratchet head is provided with a circle of ratchet teeth.

[0015] A further preferred solution of the present invention is that the gear seat is covered with a handle, the handle is located on one side of the handle, and the reversing button is located on the other side of the handle.

[0016] Compared with the prior art, the advantage of the present invention is that firstly, the upper ratchet head and the lower ratchet head are connected by a small pinion, so that the upper ratchet head and the lower ratchet head rotate in opposite directions. By setting a forward pawl and a reverse pawl, and cooperating with the ratchet teeth of the upper ratchet head and the lower ratchet head, the ratchet effect of the upper ratchet head and the lower ratchet head is achieved. That is, no matter whether the handle rotates forward or reverses, the main shaft rotates in the same direction. In order to realize the switchable rotation direction of the main shaft, the present invention sets a reversing seat. Turning the reversing seat can drive the forward pawl and the reverse pawl to move and switch the meshed ratchet teeth, thereby changing the ratchet effect of the upper ratchet head and the lower ratchet head, so that the ratchet directions of the upper ratchet head and the lower ratchet head are swapped. In summary, the structural design of the present invention can realize the bidirectional operation of the screwdriver. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a schematic diagram of the decomposition structure of the present invention;

[0020] Figure 3 is a cross-sectional view of the present invention;

[0021] Figure 4 It is a schematic diagram of the internal structure of the present invention;

[0022] Figure 5 It is a schematic structural diagram of the upper ratchet head of the present invention. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] like Figures 1 to 5As shown: a bidirectional ratchet screwdriver, comprising a handle 1, a spindle 2 acting on a working end, a ratchet seat 3 and a reversing seat 4, the ratchet seat 3 is sleeved outside the spindle 2 and can drive the spindle 2 to rotate synchronously, an upper ratchet head 5 and a lower ratchet head 6 are respectively installed at both ends of the ratchet seat 3, the upper ratchet head 5 and the lower ratchet head 6 have the same structure and are fixedly connected to the handle 1, the upper ratchet head 5 is provided with a circle of face gear teeth 5a and a circle of ratchet teeth 5b, the face gear teeth 5a of the upper ratchet head 5 and the face gear teeth 5a of the lower ratchet head 6 are connected by a pinion 7, the upper ratchet head 5 The rotation drives the lower ratchet head 6 to rotate in the opposite direction. The outer periphery of the reversing seat 4 is equipped with at least one group of forward pawls 8 and reverse pawls 9 passing through the ratchet seat 3. The reversing seat 4 is rotated to drive the forward pawl 8 or the reverse pawl 9 to act on the ratchet teeth 5b of the upper ratchet head 5 and the lower ratchet head 6. The upper ratchet head 5 only drives the forward pawl 8 to rotate forward or the reverse pawl 9 to reverse, and the lower ratchet head 6 drives the forward pawl 8 to reverse or the reverse pawl 9 to rotate forward. The rotating forward pawl 8 and reverse pawl 9 drive the main shaft 2 to rotate through the ratchet seat 3. It should be noted that the present invention defines the clockwise rotation of the handle 1 as forward rotation and the counterclockwise rotation of the handle 1 as reverse rotation when the working end is viewed from the direction of the handle 1. The forward pawl 8 and the reverse pawl 9, the positive notch 10 and the reverse notch 11 in this article are only used to distinguish different components and have no specific meaning.

[0026] The reversing seat 4 is sleeved outside the main shaft 2, and the main shaft 2 can rotate freely in the reversing seat 4. The reversing seat 4 is connected to the reversing button 15. Turning the reversing button 15 will drive the reversing seat 4 to rotate forward or reverse.

[0027] The surface of the reversing seat 4 is provided with a positive notch 10 and a negative notch 11 of a parallelogram structure, and the end walls of the positive notch 10 and the negative notch 11 are inclined surfaces and the inclination directions of the two are opposite. The structural design of the positive notch 10 and the negative notch 11 of the present invention stipulates that when the positive pawl 8 is engaged with the upper ratchet head 5, the positive pawl 8 must be disengaged from the lower ratchet head 6, and vice versa; when the reverse ratchet pawl is engaged with the upper ratchet head 5, the reverse pawl 9 must be disengaged from the lower ratchet head 6, and vice versa. In other words, whether it is the positive pawl 8 or the reverse pawl 9, it can only be engaged with one of the upper ratchet head 5 and the lower ratchet head 6.

[0028] Moreover, when the forward pawl 8 is meshed with the upper ratchet head 5, the reverse pawl 9 is also meshed with the lower ratchet head 6. At this time, when the handle 1 rotates forward, that is, the upper ratchet head 5 rotates forward, the upper ratchet head 5 drives the forward pawl 8 to rotate forward, and the lower ratchet head 6 reverses at this time, but the reversed lower ratchet head 6 cannot drive the reverse pawl 9 to flip, and the lower ratchet head 6 is in an idling state (this is achieved by the structure of the reverse pawl 9, that is, the end of the reverse pawl 9 in the following text is an inclined surface). When the handle 1 reverses, that is, the upper ratchet head 5 reverses, the upper ratchet head 5 idles (this is achieved by the structure of the forward pawl 8, that is, the end of the forward pawl 8 in the following text is an inclined surface), and the lower ratchet head 6 rotates forward, and the forward-rotating ratchet head drives the reverse pawl 9 to rotate forward. So far, the present invention realizes that the handle 1 rotates forward or reverses, and the reversing seat 4 realizes forward rotation, thereby driving the main shaft 2 to rotate forward.

[0029] When the reverse pawl 9 is engaged with the upper ratchet head 5, the forward pawl 8 is also engaged with the lower ratchet head 6. At this time, when the handle 1 rotates forward, that is, the upper ratchet head 5 rotates forward, the upper ratchet head 5 rotates idly, and the lower ratchet head 6 reverses at this time, and the reversed ratchet head drives the forward pawl 8 to reverse. When the handle 1 reverses, that is, the upper ratchet head 5 reverses, the upper ratchet head 5 drives the reverse pawl 9 to reverse, and at this time, the forward rotation of the lower ratchet head 6 cannot drive the forward pawl 8 to rotate, and the lower ratchet head 6 rotates idly. So far, the present invention realizes that the handle 1 rotates forward or reverses, and the reversing seat 4 is reversed, thereby driving the main shaft 2 to reverse.

[0030] A channel 12 is axially provided on the surface of the ratchet seat 3 , through which the positive pawl 8 and the reverse pawl 9 pass and can only move along the channel 12 , and the rotation of the reversing seat 4 will drive the positive pawl 8 and the reverse pawl 9 to move axially along the channel 12 .

[0031] The forward pawl 8 and the reverse pawl 9 are in a long and narrow parallelogram structure, and the ends of the forward pawl 8 and the reverse pawl 9 are inclined surfaces and the inclination directions of the two are opposite. The structural arrangement of the forward pawl 8 and the reverse pawl 9, in conjunction with the ratchet teeth 5b of the upper ratchet head 5 and the lower ratchet head 6, achieves the ratchet effect of the present invention.

[0032] The positive pawl 8 is installed in the positive notch 10, and the reverse pawl 9 is installed in the reverse notch 11. The end of the positive pawl 8 is in the same inclination direction as the end wall of the positive notch 10, and the end of the reverse pawl 9 is in the same inclination direction as the end wall of the reverse notch 11. That is, when the reversing seat 4 rotates, the positive pawl 8 and the reverse pawl 9 will move in opposite directions.

[0033] The positive pawl 8 and the reverse pawl 9 are both composed of two claws connected by springs, a protrusion is arranged on the inner side of the claw, and the claw is installed in the positive notch 10 or the reverse notch 11 through the protrusion. The spring is in a compressed state, and the spring drives the protrusion to be close to the end wall of the positive notch 10 or the reverse notch 11. Ensure that the positive pawl 8 and the reverse pawl 9 move in place.

[0034] A gear seat 13 is provided on the middle of the ratchet seat 3, and pinions 7 are installed on both sides of the gear seat 13. The pinions 7 are arranged perpendicular to the upper ratchet head 5 and the lower ratchet head 6, and the pinions 7 connect the upper ratchet head 5 and the lower ratchet head 6. The pinions 7 realize the synchronous rotation of the upper ratchet head 5 and the lower ratchet head 6, and the rotation directions of the two are opposite.

[0035] The upper ratchet head 5 is in a cylindrical structure. The outer end surface of the upper ratchet head 5 is provided with a circle of surface gear teeth 5a, and the inner bottom surface of the upper ratchet head 5 is provided with a circle of ratchet gear teeth 5b.

[0036] The gear seat 13 is covered with a handle 14 , the handle 1 is located on one side of the handle 14 , and the reversing button is located on the other side of the handle 14 .

[0037] When the present invention is used, the working direction is first selected by the reversing button, such as selecting the forward rotation of the working end. The user can hold the grip 14 with one hand and rotate the handle 1 with the other hand. The handle 1 rotates forward (clockwise). Since the forward pawl 8 is engaged with the ratchet teeth 5b of the upper ratchet head 5, the upper ratchet head 5 will drive the forward pawl 8 and the ratchet seat 3 to rotate, so the spindle 2 and the handle 1 rotate forward, thereby causing the working end to rotate clockwise. The handle 1 is reversed (rotated counterclockwise), and the upper ratchet head 5 and the forward pawl 8 are in an idling state due to the ratchet function. At this time, the lower ratchet head 6 rotates forward (clockwise), and since the reverse pawl 9 is engaged with the lower ratchet head 6, the ratchet seat 3 is driven to rotate forward, thereby causing the working end to rotate clockwise. Similarly, when the reversing button selects the reverse rotation of the working end, regardless of whether the handle 1 rotates forward or reverses, the spindle 2 acting on the working end rotates counterclockwise.

[0038] Therefore, the present invention enables the handle 1 to swing back and forth clockwise and counterclockwise, and the working end moves in the same direction, thereby greatly improving the working efficiency.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The present invention is described in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A bidirectional ratchet screwdriver, characterized in that The camshaft is a gear that is fixed to the upper and lower ends of the gear, and the camshaft is a gear that is fixed to the lower ends of the gear, and the camshaft is a gear that is fixed to the upper and lower ends of the gear. The reversing seat sleeve is arranged outside the main shaft, and the main shaft can rotate freely in the reversing seat. The reversing seat is connected to the reversing button. Turning the reversing button will drive the reversing seat to rotate forward or reverse. The surface of the reversing seat is provided with positive notches and negative notches of a parallelogram structure. The end walls of the positive notches and negative notches are inclined surfaces and the inclination directions of the two are opposite.

2. A bidirectional ratchet screwdriver according to claim 1, characterized in that The ratchet seat surface is provided with a channel along the axial direction, the forward pawl and the reverse pawl pass through the channel and can only move along the channel, and the rotation of the reversing seat will drive the forward pawl and the reverse pawl to move axially along the channel.

3. A bidirectional ratchet screwdriver according to claim 1, characterized in that The positive pawl and the reverse pawl are in a long and narrow parallelogram structure, and the ends of the positive pawl and the reverse pawl are inclined surfaces with opposite inclination directions.

4. A bidirectional ratchet screwdriver according to claim 3, characterized in that The positive pawl is installed in the positive slot, and the reverse pawl is installed in the reverse slot. The end of the positive pawl is in the same inclination direction as the end wall of the positive slot, and the end of the reverse pawl is in the same inclination direction as the end wall of the reverse slot.

5. A bidirectional ratchet screwdriver according to claim 1, characterized in that The positive pawl and the reverse pawl are both composed of claw pieces connected by two springs. A protrusion is set on the inner side of the claw piece. The claw piece is installed in the positive slot or the reverse slot through the protrusion. The spring is in a compressed state, and the spring drives the protrusion to be close to the end wall of the positive slot or the reverse slot.

6. A bidirectional ratchet screwdriver according to claim 1, characterized in that The middle part of the ratchet seat is covered with a gear seat, and small gears are installed on both sides of the gear seat. The small gears are arranged perpendicular to the upper ratchet head and the lower ratchet head, and the small gears connect the upper ratchet head and the lower ratchet head.

7. A bidirectional ratchet screwdriver according to claim 1, characterized in that The upper ratchet head is in a cylindrical structure, the outer end surface of the upper ratchet head is provided with a circle of surface gear teeth, and the inner bottom surface of the upper ratchet head is provided with a circle of ratchet teeth.

8. A bidirectional ratchet screwdriver according to claim 6, characterized in that The gear seat is covered with a handle, the handle is located on one side of the handle, and the reversing button is located on the other side of the handle.

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