CN217195030U - Ratchet mechanism and hand tool - Google Patents

Abstract

A ratchet mechanism comprising: a first member having an annular surface with a plurality of teeth disposed thereon parallel to an axial direction thereof; a second member configured to be rotatable with respect to a circumferential direction of the annular surface; at least two first drive transmitting members disposed on the second member, each of the first drive transmitting members including at least one ratchet tooth, the first drive transmitting members being configured to be engageable with the teeth to transmit motion between the first member and the second member, wherein the ratchet tooth of each of the first drive transmitting members is in a different state of engagement from the teeth. The present application further provides a hand tool including the ratchet mechanism described above. The ratchet mechanism provided by the application can provide more gears under the condition that the number of teeth is not increased, realizes smaller backspacing angles, is suitable for smaller installation space, improves the transmission efficiency, and can reduce the resistance of ratchets and pawls during rotation.

Description

Ratchet mechanism and hand tool

Technical Field

The application relates to the technical field of hand tools, in particular to a ratchet mechanism and a hand tool.

Background

In general, in a hand tool such as a screwdriver or a torque wrench, since a movement of a hand in a rotation direction is limited to a certain extent and does not continue in one direction, the hand has to be rotated in a reverse direction or the hand tool is detached from a rotated screw or the like, and the rotation is performed again after the position is adjusted. In some small spaces, limited by the operating space, it may also be necessary to continuously adjust the position of the hand or the position of the tool.

The ratchet wrench and the ratchet screwdriver enable a hand to rotate together with the operating handle of the tool in the rotating process, and the problems are effectively solved. In the existing ratchet wrench or ratchet screwdriver, when a ratchet wheel and a pawl transmit force, torque force applied to a handle is transmitted to an output end through a ratchet wheel and pawl transmission mechanism, when the handle is reset, the ratchet wheel and pawl transmission mechanism idles, and when the handle rotates by one tooth, the pawl slides on the ratchet wheel to generate a click sound. Therefore, in the process of applying force and resetting through the handle, a neutral gear of one tooth always exists, namely after the force applied to the handle reaches the extreme position, the force application rotation can be continued only when the reset rotation of the handle is not less than the central angle corresponding to one tooth, and taking 60 gear teeth uniformly distributed on the circumference of the ratchet wheel as an example, the central angle corresponding to one gear tooth is 6 degrees, namely after the force applied to the handle reaches the extreme position, the force application rotation can be continued only when the reset rotation of the handle is 6 degrees; taking 72 gear teeth evenly distributed on the circumference of the ratchet wheel as an example, the central angle corresponding to one gear tooth is 5 degrees, and then after the force applied to the handle reaches the extreme position, the force applied to the handle can be continuously applied to rotate only when the handle is reset to rotate by 5 degrees. In order to reduce the reset rotating angle of the handle, the number of the gear teeth can be increased, but under the condition of ensuring the tooth shape size and the product strength, the increase of the number of the gear teeth increases the overall dimension of the ratchet wheel, and if the number of the gear teeth is increased on the premise of ensuring the overall dimension of the ratchet wheel to be unchanged, the gear teeth are smaller, the reliability of the engagement of the pawl and the gear teeth is reduced, and the force transmission capacity is reduced. In addition, when the number of the gear teeth is small, the rotation resistance is large, the use failure of the ratchet wheel is easy to cause, and the shaking is large. Therefore, under the condition of a certain outer diameter size, in order to ensure the strength of a product, the number of gears of the ratchet wheel cannot be infinitely increased, the number of teeth is small, the rotation angle is large, and the use of the ratchet wheel in a narrow space is influenced.

Therefore, those skilled in the art have endeavored to provide a ratchet mechanism and a hand tool made of the ratchet mechanism, which can ensure the strength of the product under a certain outer diameter, reduce the rotation resistance, reduce the shaking, better eliminate the backlash, and improve the transmission efficiency.

SUMMERY OF THE UTILITY MODEL

In view of the defects in the prior art, the technical problem to be solved by the present application is how to provide a ratchet mechanism and a hand tool thereof, which can reduce the resistance force when the ratchet rotates.

To achieve the above object, the present application provides a ratchet mechanism comprising:

a first member having an annular surface with a plurality of teeth disposed thereon parallel to an axial direction thereof;

a second member configured to be rotatable with respect to a circumferential direction of the annular surface;

at least two first drive transfer members disposed on the second member, each of the first drive transfer members including at least one ratchet tooth, the first drive transfer members configured to be engageable with the teeth of the first member to transfer motion between the first member and the second member, wherein the ratchet tooth of each of the first drive transfer members is in a different state of engagement than the teeth of the first member.

Further, the ratchet mechanism further comprises at least two second drive transmitting members provided on the second member, each of the second drive transmitting members comprising at least one ratchet tooth, the second drive transmitting members being configured to be engageable with the teeth of the first member to transmit unidirectional motion between the first member and the second member, wherein the ratchet tooth of each of the second drive transmitting members is in a different state of engagement from the teeth of the first member;

wherein, when the first member and the second member move relative to the first direction, the first drive transmitting member is in an operating state and the second drive transmitting member is in an inoperative state; when the first member and the second member move relative to the second direction, the second drive transmission member is in an operating state, and the first drive transmission member is in an inoperative state.

Further, the engaged state includes a state in which the drive transmission member is completely engaged with the teeth of the first member, and a state in which the drive transmission member is partially engaged with the teeth of the first member.

Further, the second member includes a plurality of receiving slots for supporting the drive transmitting members, at least one of the drive transmitting members being disposed within the receiving slot, the receiving slots having an opening toward the teeth of the first member through which at least a portion of the drive transmitting members passes such that the ratchet teeth of the drive transmitting members can engage the teeth of the first member; an elastic element is connected to the drive transmitting member.

Further, the contact face of each of the accommodation grooves and the drive transmission member accommodated therein has a different inclination angle with respect to the radial direction of the annular surface, so that the drive transmission member has a different lead angle, thereby differing from the meshing state of the teeth of the first member.

Further, the teeth of the first member are located on an inner circumferential surface of the annular surface and the second member is located within a chamber defined by the annular surface.

Further, each of the receiving grooves has a first opening and a second opening disposed oppositely, one of the first drive transmission members is located at the first opening, and one of the second drive transmission members is located at the second opening; a first elastic element is disposed between the first drive transmitting member and the second drive transmitting member.

Further, each of the drive transmission members has first and second opposite side surfaces, the ratchet teeth are disposed on the first side surface, the second side surface is located in the receiving groove, and an inclined surface is provided between the first and second side surfaces and is in contact with the contact surface of the receiving groove; one drive transmission member is disposed in each of the receiving grooves, and a first elastic element is disposed between the drive transmission member and a side wall of the receiving groove.

Furthermore, the ratchet mechanism further comprises an annular support arranged at the end part of the second component, a long through hole is arranged on the annular support corresponding to the position of each drive transmission component, one end of each drive transmission component extends into the long through hole, and the inclination angle of the long through hole relative to the radial direction is the same as that of the corresponding contact surface.

Further, the ratchet mechanism further includes a switching assembly provided on the second member, the switching assembly being configured to be able to switch the operating states of the first drive transmission member and the second drive transmission member.

Further, the switching assembly includes an end cap disposed at an end of the second member and configured to be rotatable relative to the second member to a first position and a second position; at least two blocking pieces are arranged on one side, facing the second component, of the end cover; when the end cover is located at the first position, each baffle sheet contacts with one corresponding first drive transmission member so as to enable the baffle sheets to be in a non-working state; when the end cover is located at the second position, each baffle sheet contacts with one corresponding second drive transmission member respectively so as to enable the second drive transmission member to be in the non-working state.

Further, a limiting part is arranged on one side, facing the second component, of the end cover in a protruding mode, a limiting groove matched with the limiting part is formed in the second component, and the limiting part is configured to slide in the limiting groove when the end cover rotates; two ends of the limiting groove can block the movement of the limiting part, so that the end cover is located at the first position or the second position.

Furthermore, the limiting part comprises a first concave part and a second concave part which are arranged in series, a locking groove communicated with the limiting groove is arranged on the second component, and a locking ball is arranged in the locking groove; when the end cover is located at the first position, the first concave part is opposite to the locking groove, so that the locking ball falls into the first concave part; when the end cover is located at the second position, the second concave part is opposite to the locking groove, so that the locking ball falls into the second concave part.

Further, a circular boss is arranged on one side, facing the second component, of the end cover, and a circular concave part matched with the circular boss is arranged on the second component; the circular boss is configured to slide within the circular recess when the end cap is rotated; the edge of circular boss is provided with spacing portion toward radial protrusion, the lateral wall of circular depressed part is provided with spacing recess, spacing portion can slide in the spacing recess, two tip of spacing recess can block the motion of spacing portion, make the end cover is located first position or the second position.

Furthermore, a first groove and a second groove are formed in the side wall of the circular concave part, a transverse groove is formed in the circular boss, and a locking ball is arranged in the transverse groove; when the end cover is located at the first position, the transverse groove is communicated with the first groove, and the locking ball falls into the first groove; when the end cover is located at the second position, the transverse groove is communicated with the second groove, and the locking ball falls into the second groove.

Further, the first member defines a cavity, an inner surface of the cavity forming the annular surface;

the ratchet mechanism comprises two fan-shaped parts which are oppositely arranged, and the fan-shaped parts are positioned in the cavity; one end of each of the sector parts forms the first drive transmission member, and the other end forms the second drive transmission member; an elastic element is arranged between the fan-shaped parts;

the middle part of each fan-shaped part is provided with a through hole, and the second component is provided with a columnar part which can correspondingly penetrate through the through hole.

Further, the ratchet mechanism further comprises a support member, wherein the support member comprises an annular part and a shaft part, and the shaft part extends from the annular part to the first member direction and is positioned between the two sector-shaped parts; the annular part is provided with an arc-shaped hole corresponding to the columnar part, and the columnar part penetrates through the arc-shaped hole and then enters the through hole; the shaft part is provided with a limiting hole which penetrates through the shaft part along the radial direction, two opposite spherical parts are arranged in the limiting hole, and the elastic element is arranged between the two spherical parts; the two spherical parts may respectively contact the corresponding sector parts and are configured to drive the corresponding sector parts to rotate around the columnar portion.

Further, the teeth of the first member are located on an outer circumferential surface of the annular surface; the second member defines a chamber within which the portion of the first member on which the teeth are disposed is located.

Furthermore, the ratchet mechanism further comprises an end cover sleeved outside the second component, a plurality of retaining posts are arranged on one surface, facing the accommodating grooves, of the end cover, limiting grooves are formed between every two adjacent accommodating grooves, and the retaining posts can slide in the corresponding limiting grooves; each accommodating groove receives one drive transmission member, and part of the drive transmission member is positioned in the limiting groove, so that the stop pillar contacts and drives the drive transmission member when moving to the end part of the limiting groove, and the drive transmission member is in a non-working state.

The application also provides a hand tool which can be a wrench or a screwdriver, and comprises a handle and the ratchet mechanism connected with the handle; the handle is configured to drive the first member or the second member of the ratchet mechanism to rotate under an external force.

The application has at least the following beneficial technical effects:

the application provides a ratchet mechanism, the different engaged state between ratchet and the drive transmission component is guaranteeing under the unchangeable condition of tooth number, has increased the transmission gear, makes transmission efficiency higher, and the precision fit provides littleer rocking, and can eliminate the effect of tooth clearance better. When backing, a smaller backing angle can be realized due to the increase of gears, the strength is ensured, and the device is suitable for a smaller installation space; in addition, the resistance between the ratchet wheel and the pawl during rotation is reduced, and the abrasion is effectively reduced.

The conception, specific structure and technical effects of the present application will be further described in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present application.

Drawings

Fig. 1 is an exploded view of the internal structure of embodiment 1 of the present application;

fig. 2 is a front view of embodiment 1 of the present application;

FIG. 3 is a cross-sectional view I-I of FIG. 2;

fig. 3a is a schematic view of a shutter blocking a first drive transmission member in embodiment 1 of the present application;

fig. 3b is a schematic view of the second drive transmission member being blocked by the shutter in embodiment 1 of the present application;

FIG. 4 is a structural view of a second member of embodiment 1 of the present application;

fig. 5 is a schematic structural view of a drive transmission member of embodiment 1 of the present application;

fig. 6 is a drive transmission member leading angle schematic view of embodiment 1 of the present application;

FIG. 7 is an exploded schematic view of example 1 of the present application showing the end cap;

FIG. 8 is an exploded schematic view of example 1 of the present application showing the back side of the end cap;

FIG. 9 is a sectional view of embodiment 1 of the present application;

FIG. 10 is a schematic view of a retaining groove of the second member of example 1 of the present application;

FIG. 11 is a schematic structural view of embodiment 2 of the present application;

FIG. 12 is a schematic structural view of embodiment 3 of the present application;

FIG. 13 is a structural view of a second member of embodiment 3 of the present application;

fig. 14 is an exploded schematic view of an end cap and a second structure of embodiment 3 of the present application;

FIG. 15 is a schematic structural view of an end cap of embodiment 3 of the present application;

FIG. 16 is a schematic structural view of embodiment 4 of the present application;

FIG. 17 is an exploded schematic view of embodiment 4 of the present application;

fig. 18 is a sectional view of embodiment 4 of the present application;

FIG. 19 is an exploded schematic view of embodiment 5 of the present application;

fig. 20 is an internal structural view of embodiment 5 of the present application;

fig. 21 is a schematic connection diagram of the drive transmitting member, the first member, and the second member of embodiment 5 of the present application;

FIG. 22 is a structural view of a second member of embodiment 5 of the present application;

FIG. 23 is a schematic structural view of an end cap of embodiment 5 of the present application;

FIG. 24 is a schematic structural view of the wrench of the present application;

FIG. 25 is an exploded schematic view of the wrench of the present application;

FIG. 26 is a schematic structural view of a screwdriver of the present application;

fig. 27 is an exploded schematic view of fig. 26.

Detailed Description

The technical contents of the preferred embodiments of the present application will be more clearly understood and appreciated by referring to the drawings attached to the specification. The present application may be embodied in many different forms of embodiments and the scope of the present application is not limited to only the embodiments set forth herein.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the size and thickness of each component are not limited in the present application. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.

Ratchet wheel mechanism

The present application provides a ratchet mechanism comprising a first member, a second member and at least two first drive transmitting members, wherein the first member is an annular member provided with teeth on the entire circumferential surface thereof, the teeth being provided on the outer circumferential surface or the inner circumferential surface of the first member; the second member is rotatable relative to the circumferential direction of the first member, the second member carrying a first drive transfer member having at least one ratchet tooth engageable with the teeth of the annular member. The first drive transmitting member is capable of transmitting motion, and in particular, when an external force acts on the first member to rotate the first member in a first direction, the first member engages with the first drive transmitting member to transmit motion to the second member to rotate the second member in a predetermined direction. The first direction may be clockwise or counterclockwise. It will be appreciated that it is also possible to provide the second member as an active member, i.e. to apply an external force to the second member so as to move it in a first direction and then to transmit the movement to the first member via the first drive transmission member so as to rotate the first member in a predetermined direction. Wherein, during the motion transmission process, each first drive transmission member has different meshing states with the teeth on the first member, wherein the meshing states at least comprise two meshing states, wherein, the first meshing state, namely the complete meshing state, means that the first drive transmission member is completely meshed with the teeth on the first member, and the second meshing state, namely the partial meshing state, means that the first drive transmission member is partially meshed with the teeth on the first member. Each of the first drive transmitting members is periodically changed in an engagement state thereof with rotation of the ratchet mechanism when transmitting the motion.

The partially engaged state may also be subdivided into a number of situations according to the different number of first drive transfer members, for example, in some embodiments three first drive transfer members are used, wherein the first drive transfer member is in a fully engaged state, the second first drive transfer member is in engagement with only one third of the teeth on the first member, and the third first drive transfer member is in engagement with only two thirds of the teeth on the first member. When four first drive transmission members are used, the first of which is in a fully engaged state, the remaining three of which are in a partially engaged state, which are partially engaged in a state of one-quarter tooth, one-half tooth, three-quarter tooth, and so on, respectively.

Through setting up each of first drive transmission component to have different engagement state, can guarantee under the unchangeable condition of the quantity of the tooth of first component that ratchet has more gears, transmission efficiency is higher, rocks littleer, can play the effect of eliminating the tooth clearance better, has guaranteed intensity, has improved the motion precision again. In a limited space, the number of gears can be increased, a smaller backspacing angle is realized, the strength is ensured, the size of the ratchet mechanism is more compact, a good motion transmission effect is achieved, and the ratchet mechanism can be suitable for a smaller installation space. Meanwhile, the ratchet mechanism has smaller resistance in rotation, and reduces the abrasion of the ratchet mechanism.

The ratchet mechanism of the application can be further provided with at least two second drive transmission members, so that when the ratchet mechanism rotates in a second direction, the motion transmission between the first member and the second member can be realized, wherein the second direction is opposite to the first direction. The second drive transmitting member acts the same as the first drive transmitting member except that, in the first direction of rotation, the second drive transmitting member does not act; the first drive transmitting member is inoperative when rotating in the second direction. Through setting up first drive transmission component and second drive transmission component, can realize that ratchet has two-way function, and can both expand ratchet's gear in two-way.

The ratchet mechanism can be used on hand tools such as ratchet wrenches, ratchet screwdrivers and bidirectional wrenches, and can realize continuous rotation of the pair of tools in a narrow space. It should be understood that the ratchet mechanism of the present application can be used in other tools that provide torque by rotation, and is not limited to hand tools.

The present application will describe the ratchet mechanism in detail by the following embodiments.

Example 1

Fig. 1 to 10 show the structure of example 1.

As shown in fig. 1, 2 and 3, in the present embodiment, the ratchet mechanism 100 includes a first member 110, a second member 120, and three first drive transmission members 130.

The first member 110 is an annular member including an annular body having an axially extending through bore defining a chamber 111. The chamber 111 has a circumferentially extending wall facing radially inwardly of the annular member on which a plurality of teeth 112 are provided. The plurality of teeth 112 are parallel to each other, and each tooth 112 may extend along the axial direction of the first member 110, parallel to the axial direction of the first member 110. The teeth 112 may extend from one end of the first member 110 to the other end along the axial direction of the first member 110, or may extend partially, i.e., a partial region of the bypass surface along the axial direction is free of the teeth 112.

Referring to fig. 1 and 4, the second member 120 is at least partially received in the cavity 111. The second member 120 is provided with three receiving grooves 121 for receiving the first drive transmission member 130, wherein the three receiving grooves 121 may be uniformly distributed along a circumferential direction of the second member 120, and one end of each receiving groove 121 is provided with a first opening 1211 facing the first member 110. Referring to fig. 3, a first drive transmission member 130 is in a receiving groove 121. Wherein a portion of the first drive transmitting member 130 passes through the first opening 1211 and is capable of engaging with the teeth 112 of the first member 110.

As shown in fig. 5, the first drive transmitting member 130 is generally wedge-shaped having a first end 1301 and a second end 1302 disposed opposite one another, wherein the first end 1301 has at least one ratchet tooth 1303 disposed thereon, and the ratchet tooth 1303 passes through the first opening 1211 and is engageable with the teeth 112 of the first member 110. In some embodiments, the first end 1301 of the first drive transmitting member 130 may be provided as a circular arc-shaped sidewall having the same curvature as the wall of the cavity 111 of the first member 110, and the first end 1301 may be provided with a plurality of ratchet teeth 1303 thereon. Referring to fig. 3, the second end 1302 is disposed within the receiving groove 121. Opposite side surfaces of the first drive transmission member 130 between the first end 1301 and the second end 1302 are respectively in contact with the side walls of the receiving groove 121, so that the first drive transmission member 130 is supported by the receiving groove 121.

In the present embodiment, as shown in fig. 3, the first member 110 is an active member, that is, an external force acts on the first member 110, so that the first member 110 can move along the first direction X. At this time, the motion is transmitted to the second member 120 through the first drive transmission member 130, so that the second member 120 is rotated in a predetermined direction, which may be the same direction as the first direction X or the opposite direction to the first direction X, depending on the engagement direction of the first drive transmission member 130 with the first member 110. Here, the preset direction is set to be the same as the first direction X. When the first member 110 is driven in the direction opposite to the first direction X, the first drive transmission member 130 no longer transmits motion, the ratchet teeth 1303 thereof relatively slide along the teeth 112 of the first member 110, and the second member 120 remains stationary, i.e., the rotation of the ratchet mechanism 100 is realized.

The three first drive transmission members 130 are different in the engagement state with the teeth 112 of the first member 110, respectively. As shown in fig. 3, when the first member 110 is driven in the first direction X, the first drive transmitting member 130a is fully engaged with the teeth 112 of the first member 110, i.e., in the first state E; the first drive transmitting member 130b is engaged with two thirds of the teeth 112 of the first member 110, i.e., the second state F; the first drive transmitting member 130c is engaged with one third of the teeth 112 of the first member 110, i.e., the third state G. As the first member 110 continues to rotate, the first drive transmitting member 130a becomes one-third engaged, i.e., a third state G; the first drive transmitting member 130b becomes the fully engaged state, i.e., the first state E; the first drive transmitting member 130c becomes engaged by two thirds, i.e., the second state F; so as to reciprocate.

By setting the three first drive transmission members 130 to different engagement states, the gear positions of the ratchet mechanism 100 can be increased without increasing the number of teeth 112 of the first member 110, and the transmission efficiency and the fitting precision can be improved, thereby reducing the backlash. As is well known, the greater the number of teeth of the first member 110, the greater the precision of the transmission, but accordingly, the thickness of each tooth 112 is reduced, so that it is not strong enough to be easily worn or broken, thereby making the ratchet mechanism 100 fail. However, if the number of teeth 112 is required to be reduced for increased strength, the accuracy of the transmission is reduced. Through the ratchet mechanism 100 of the application, the gear can be increased while the strength is ensured, and the transmission precision is improved. For example, in the present embodiment, the number of teeth of the first member 110 is set to 72, and by providing three first drive transmission members 130 as described above, the number of shift positions is changed to 216, the fitting is more precise, the backlash can be effectively reduced, the backlash can be eliminated, and the rotation resistance during rotation is also smaller. If four first drive transfer members 130 are provided, the gear positions can be changed to 288, and so on.

As described above, the first drive transmission member 130 is disposed in the accommodation groove 121 of the second member 120, supported by the accommodation groove 121. To ensure that the ratchet teeth 1303 of the first drive transmitting members 130 are at different lead angles, i.e., each first drive transmitting member 130 is in a different state of engagement with the teeth 112 of the first member 110, the contact surfaces 1213 of the receiving grooves 121 that contact the first drive transmitting members 130 may be designed to have different plane slopes. Specifically, as shown in fig. 4 and 6, which show the structural view of the accommodation groove 121 in which the first drive transmission member 130 is located, the middle portion of the side wall of the accommodation groove 121 has a reference plane 1214, and the contact surface 1213 of the first drive transmission member 130 and the accommodation groove 121 is inclined at an angle α with respect to the reference plane 1214. The structure of the accommodating groove 121 where the other first driving transmission members 130 are located is similar. Each receiving groove 121 is inclined at an angle α to the contact surface 1213 of the corresponding first drive transmission member 130, except that the angles α at which the contact surfaces 1213 of the three receiving grooves 121 are inclined are different, and the specific value of the angle α may be set according to the lead angle required for the corresponding first drive transmission member 130.

Described above is the structure when the ratchet mechanism 100 is driven in only one direction (i.e., the first direction X).

In order to realize the bidirectional transmission of the ratchet mechanism 100, a group of second drive transmission members 140 including three second drive transmission members 140 may be further added to the ratchet mechanism 100. As shown in fig. 3, the second drive transmitting member 140, which is substantially the same shape as the first drive transmitting member 130, is disposed within the receiving slot 121, and ratchet teeth thereon pass through the second opening 1222 of the receiving slot 121 to engage the teeth 112 on the first member 110. And will not be described in detail herein. When an external force acts on the first member 110 to move the first member 110 in the second direction Y (which is a direction opposite to the first direction X), the movement is transmitted to the second member 120 through the second drive transmission member 140, so that the second member 120 rotates in a predetermined direction, which may be the same direction as the second direction Y or a direction opposite to the second direction Y, depending on the engagement direction of the second drive transmission member 140 with the first member 110. The preset direction is set to be the same as the second direction Y here. When the first member 110 is driven in the direction opposite to the second direction Y, the second drive transmission member 140 no longer transmits the motion, the ratchet teeth 1303 thereof relatively slide along the teeth 112 of the first member 110, and the second member 120 remains in a stationary state, i.e., the rotation of the ratchet mechanism 100 is realized. Similar to the first drive transmission member 130, the second drive transmission members 140 have different engagement states with the teeth 112 of the first member 110, and the engagement state of each second drive transmission member 140 is reciprocally changed with the rotation of the first member 110. The second driving transmission member 140 also realizes different engagement states by different inclination angles of the contact surfaces 1213 of the receiving grooves 121, which is the same as that shown in fig. 6 and will not be described again.

Referring to fig. 7, in order to switch the rotation direction of the ratchet mechanism 100, the present embodiment further includes a switching assembly 150. When the switching assembly 150 is located at the first position, the ratchet mechanism 100 rotates forward, that is, the first member 110 is driven to move in the first direction X, the first drive transmission member 130 operates to transmit the motion to the second member 120, and at this time, the second drive transmission member 140 does not function; when the switching assembly 150 is in the second position, the ratchet mechanism 100 is reversed, i.e. the first member 110 is driven to move in the second direction Y, and the second drive transmitting member 140 is operated to transmit the movement to the second member 120, wherein the first drive transmitting member 130 is disabled.

As shown in fig. 7, the switching assembly 150 includes an end cap 151, the first member 110 includes an annular portion 113, the annular portion 113 is located at an axial end of the chamber 111, and the end cap 151 may be engaged with the annular portion 113 so as to be located at an end of the chamber 111. The annular portion 113 has a different inner diameter than the chamber 111 so as to form a step surface 114 at an upper portion of the teeth 112. Referring to fig. 8 and 10, the end cap 151 protrudes toward the circumferential edge of the side surface of the tooth 112 in the direction of the second member 120 to form an annular protrusion 152, the protrusion 152 further protrudes in the radial direction of the end cap 151 to form a stopper 153 corresponding to the drive transmission member, and when the end cap 151 is positioned at the end of the cavity 111, the protrusion 152 is positioned above the step surface 114. The side of the drive transfer member facing the end cap 151 is axially higher in the chamber 111 than the height of the teeth 112 so that the flap 153 can be located between the drive transfer member and the annular portion 113. As shown in fig. 3a and 3b, when the end cap 151 is rotated to the first position, the blocking piece 153 faces the second drive transmission member 140 and contacts with it, so that the second drive transmission member 140 is disengaged from the teeth 112, and at this time, the second drive transmission member 140 is not effective when the ratchet mechanism 100 rotates in the first direction X, and the first drive transmission member 130 is engaged with the teeth 112 of the first member 110, so as to realize the motion transmission effect. When the cap 151 is rotated to the second position, the stop piece 153 faces the first drive transmission member 130 and contacts therewith, so that the first drive transmission member 130 is disengaged from the teeth 112, and at this time, the first drive transmission member 130 is not effective when the ratchet mechanism 100 rotates in the second direction Y, and the second drive transmission member 140 is engaged with the teeth 112 of the first member 110, so as to realize the motion transmission effect.

A first elastic element 125 is provided between the first drive transmitting member 130 and the second drive transmitting member 140 to restore the drive transmitting member after the drive transmitting member is disengaged from the stopper 153. Specifically, when the shutter 153 is in contact with the first drive transmitting member 130 or the second drive transmitting member 140, the first elastic element 125 is compressed to exert an elastic force on the first and second drive transmitting members 130, 140.

The end cap 151 further has a third position in which the stopper 153 is not in contact with both the first drive transmission member 130 and the second drive transmission member 140, and both the first drive transmission member 130 and the second drive transmission member 140 are engaged with the teeth 112 of the first member 110, and they are in an interference state and do not transmit motion.

Referring to fig. 7, 8 and 10, the end cap 151 is provided with a stopper 154 at a middle portion of a side surface facing the chamber 111, and a stopper groove 122 having a shape matching a movement locus of the stopper 154 along with the rotation of the end cap 151 is provided at a position corresponding to the stopper 154 on the second member 120. The limiting part 154 extends into the limiting groove 122, when the end cap 151 rotates, the limiting part 154 can slide along the limiting groove 122, when the limiting part 154 moves to one of the two ends of the limiting groove 122, the limiting groove 122 blocks the limiting part 154, so that the end cap 151 is prevented from moving continuously, and the purpose of controlling the rotating stroke of the end cap 151 is achieved. Specifically, when the stopper 154 moves to the first end 1221 of the stopper groove 122, the end cap 151 is in the first position, and the flap 153 disengages the second drive transmitting member 140 from the teeth 112; when the retaining portion 154 moves to the second end 1222 of the retaining recess 122, the cap 151 is in the second position and the flap 153 disengages the first drive transmitting member 130 from the teeth 112. The limiting portion 154 is formed by protruding from the end cap 151 toward the cavity 111, and one end thereof extends into the limiting groove 122.

The ratchet mechanism 100 further comprises a locking member to lock the ratchet mechanism 100 in the first position or the second position. As shown in fig. 7, 8 and 10, the second member 120 is provided with a locking groove 123, one end of the locking groove 123 communicates with the middle of the limiting groove 122, and a locking ball 124 is provided in the locking groove 123; the stopper portion 154 includes a first concave portion 1541 and a second concave portion 1542 that are provided in series, and each of the first concave portion 1541 and the second concave portion 1542 is concave toward the radial direction of the end cover 151. When the end cap 151 is in the first position, the first recess 1541 faces the locking groove 123, and the locking ball 124 slides into the first recess 1541, thereby locking the end cap 151 in the first position; when the end cap 151 is in the second position, the second recess 1542 faces the locking groove 123 and the locking ball 124 slides into the second recess 1542. A second elastic element 126 (see fig. 11) is disposed between the locking ball 124 and the end of the locking groove 123 far from the limiting groove 122, and can exert an elastic force on the locking ball 124 when the locking ball 124 enters the first recess 1541 or the second recess 1542. When the junction of first recess 1541 and second recess 1542 is directly opposite locking groove 123, locking ball 124 is blocked within locking groove 123 by the junction and end cap 151 is in the third position.

The ratchet mechanism 100 further includes a tail cap 160, and the tail cap 160 is disposed at an end of the chamber 111 of the first member 110 opposite to the end cap 151, and seals the chamber 111 together with the end cap 151 for protection.

A direction indicator 161 may also be provided on the end cap 151 to indicate the current rotational direction of the ratchet mechanism 100.

The present embodiment describes a ratchet mechanism 100 capable of bidirectional movement, with one set of drive transmission members acting in each direction of movement, and capable of increasing the gear positions of transmission without increasing the number of teeth. By switching the assembly 150, the direction of motion can be switched, achieving a bi-directional function.

Example 2

Fig. 11 shows the main structure of embodiment 2. Most of the features of this embodiment are the same as embodiment 1 and only the differences between the two embodiments will be described below.

As shown in fig. 11, the second member 120 is a substantially annular member, six receiving grooves 121 are circumferentially distributed on a circumferential side wall thereof, and one drive transmission member is disposed in each receiving groove 121, three of the drive transmission members serve as the first drive transmission member 130, and the other three drive transmission members serve as the second drive transmission member 140. The first drive transmitting member 130 and the second drive transmitting member 140 are evenly staggered along the circumference of the second member 120.

Each of the drive transmission members has substantially the same structure, and a detailed description will be given below taking one of the first drive transmission members 130 as an example. The first drive transmitting member 130 has a first side 131 and a second side 132 disposed opposite to each other. The first side 131 faces the first member and is provided with at least one ratchet 1303 which can engage with the teeth 112 on the first member 110. The second side 132 is located in the accommodating groove 121. One of the inclined surfaces 133 connects the first side surface 131 and the second side surface 132, and the inclined surface 133 contacts one side wall of the receiving groove 121.

The structure of each accommodating groove 121 is substantially the same, and one of them is described in detail below. The receiving groove 121 includes a first sidewall 1215 and a second sidewall 1216 oppositely disposed along a circumferential direction of the second member 120, wherein the first sidewall 1215 is disposed obliquely, i.e., the first sidewall 1215 has an included angle with a radial direction of the second member 120, and the first sidewall 1215 contacts the slope 133 of the first drive transmission member 130 to support the first drive transmission member 130. It should be noted that the first side wall 1215 of each receiving groove 121 is inclined at a different angle with respect to the radial direction of the second member 120, so that the corresponding drive transmission members have different lead angles, so that the drive transmission members respectively achieve different engagement states with the teeth 112 of the first member 110, which are the same as in embodiment 1 and will not be described again.

A first elastic element 125 is further connected to an end of each drive transmission member opposite to the inclined surface 133, and the other end of the elastic element 125 is connected to the receiving groove 121, so that an elastic force can be applied to the drive transmission member, which is restored to a position of engagement with the first member 110, as in embodiment 1.

This embodiment, like embodiment 1, is capable of bidirectional movement, with one set of drive transmitting members active in each direction of movement, and is capable of increasing the number of gears of the transmission without increasing the number of teeth. The same switching assembly as that of embodiment 1 can switch the moving direction to realize the bidirectional function.

Example 3

Fig. 12 to 15 show the structure of example 3.

As shown in fig. 12, this embodiment expands the number of drive transmission members as compared with embodiments 1 and 2, and provides a total of 12 drive transmission members, 6 of which are the first drive transmission members 130 and the other 6 of which are the second drive transmission members 140.

The second member 120 has a side wall extending in the axial direction, and 6 accommodation grooves 121 are provided in the side wall to accommodate the drive transmission members, wherein one first drive transmission member 130 and one second drive transmission member 140 are provided in one accommodation groove 121 at both ends of the accommodation groove 121, respectively. The side surface 1217 of the accommodation groove 121 that contacts the drive transmission member is an inclined surface.

As shown in fig. 13, the end of the second member 120 in the axial direction is further provided with an annular support 127, which may be formed integrally with the second member 120 or a separate component fixed to the second member 120. A through hole 1271 is provided in the ring-shaped support 127 at a position corresponding to each drive transmission member, and one end of the drive transmission member is inserted into the through hole 1271 and can slide along the length direction of the through hole 1271. Each through hole 1271 is inclined with respect to a radial direction along its length direction at an angle substantially the same as that of the corresponding inclined surface on the accommodation groove 121. The inclination angles of each inclined surface and the corresponding through hole 1271 are set to be different so that the drive transmission members have different lead angles, thereby achieving different engagement states with the teeth of the first member 110, the concept of which is the same as that of embodiment 1, i.e., one of the first drive transmission members 130 achieves full engagement and the other first drive transmission members 130 partially engage, but the areas of contact are different from each other; the same applies to the second drive transmitting member 140.

It should be understood that the structure in which the second member 120 in this embodiment supports the drive transmission member can also be applied to embodiments 1 and 2, but it is necessary to reduce the number of the receiving grooves 121 and the through holes 1271 accordingly.

The structure of the switching element 150 of the present embodiment is also different from that of the embodiments 1 and 2.

As shown in fig. 14 and 15, the switching assembly 150 includes an end cap 151, the end cap 151 includes flaps 153, and the arrangement and the function of the flaps 153 are the same as those of embodiment 1, except that the number of the flaps 153 matches the number of the drive transmission members in this embodiment, and is 6. The side 1217 of the end cap 151 facing the second member 120 is provided with a circular boss 155, and the second member 120 is provided with a corresponding circular recess 128, the circular boss 155 being located within the circular recess 128 when the end cap 151 is positioned at the end of the second member 120, and the circular boss 155 being rotatable within the circular recess 128 when the end cap 151 is rotated. The side wall of the circular boss 155 of the end cap 151 protrudes radially outward to form a limiting portion 154, the circumferential side wall of the circular recess 128 is recessed radially to form a limiting groove 122, and when the circular boss 155 rotates, the limiting portion 154 is located in the limiting groove 122 and slides along the limiting groove 122. When the limiting portion 154 moves to one of the two ends of the limiting groove 122, the end of the limiting groove 122 blocks the limiting portion 154, so as to prevent the end cap 151 from moving further, thereby achieving the purpose of controlling the rotation stroke of the end cap 151.

As shown in fig. 13, a first groove 1281 and a second groove 1282 are provided on a circumferential side wall of the circular recess 128. As shown in fig. 15, a transverse groove 1551 is formed in the circular boss 155, and an opening of the transverse groove 1551 is formed in a circumferential side wall of the circular boss 155. The locking ball 124 is disposed in the transverse groove 1551, and the elastic element 126 is disposed between the locking ball 124 and the sidewall of the transverse groove 1551. When the circular boss 155 is rotated to the first position, the opening of the transverse slot 1551 is communicated with the first groove 1281, and the locking ball 124 enters the first groove 1281 under the action of the elastic element 126, thereby locking the end cap 151 in the first position. When the circular boss 155 is rotated to the second position, the opening of the transverse groove 1551 is communicated with the second groove 1282, and the locking ball 124 enters the second groove 1282 under the action of the elastic element 126, thereby locking the end cap 151 at the second position. When the opening of the transverse channel 1551 is aligned with the junction of the first 1281 and second 1282 recesses (see fig. 12), the locking balls are also positioned within the transverse channel 1551 and the end cap 151 is in a third position.

The first groove 1281, the second groove 1282, the locking ball and the transverse groove 1551 may be provided in only one set, or may be provided in two sets as shown in the figure, to increase the strength during locking.

It should be understood that the switching assembly of the present embodiment can also be applied in embodiments 1 and 2.

This embodiment has an expanded number of drive transmitting members and a larger number of shift positions than embodiments 1 and 2.

Example 4

Fig. 16 to 18 show the structure of example 4.

The present embodiment is different from embodiment 1 in that the number of drive transmission members is reduced.

As shown in fig. 16, the present embodiment includes 2 first drive transmission members 130 and 2 second drive transmission members 140. It should be understood that the structure of these 4 drive transmission members may adopt the structure as described in embodiment 1, 2 or 3, but the number is reduced on the basis of embodiment 1, 2 or 3; the structure of the present embodiment may also be adapted to accommodate different types of hand tools.

As shown in fig. 16, one first drive transmission member 130 and one second drive transmission member 140 are integrated, i.e., formed as a sector-shaped part, and ratchet teeth are provided at both ends of the sector-shaped part, respectively, to serve as the first drive transmission member 130 and the second drive transmission member 140, respectively. Both sector parts, i.e. the first sector part 1701 and the second sector part 1702, are provided with through holes 171, and the second member 120 is provided at corresponding positions with cylindrical portions 1201 that pass through the through holes 171.

The ratchet mechanism of the present embodiment further includes a support member 180. The support member 180 comprises an annular portion 181, the annular portion 181 being provided with two arcuate through holes 182 corresponding to the cylindrical portion 1201, the cylindrical portion 1201 passing through the arcuate holes 182 and then entering the through holes 171 of the sector parts 1701, 1702. The annular portion 181 is provided with a shaft portion 183 protruding toward the side of the first member 110, the shaft portion 183 is located between two sector-shaped parts 1701 and 1702, the shaft portion 183 is provided with a stopper hole 186 penetrating in the radial direction thereof, two openings of the stopper hole 186 are oppositely arranged, one opening faces the first sector-shaped part 1701, the other opening faces the second sector-shaped part 1702, two ball-shaped parts 184 are provided in the stopper hole 186, a spring 185 is provided between the two ball-shaped parts 184, and the two ball-shaped parts 184 contact the first sector-shaped part 1701 and the second sector-shaped part 1702 respectively under the action of the spring 185.

Rotating ring portion 181 causes one spherical element 184 to contact first drive transfer member 130 on first sector element 1701 and the other spherical element 184 to contact first drive transfer member 130 on second sector element 1702, and upon abutment of spherical elements 184, both sector elements 1701, 1702 are rotated by a slight angle, respectively, so that first drive transfer member 130 engages teeth 112 on first member 110 and second drive transfer member 140 disengages teeth 112 on first member 110. By rotating the annular portion 181 in the opposite direction, the engagement states of the first drive transmission member 130 and the second drive transmission member 140 are interchanged.

In the present embodiment, the first drive transmission member 130 is engaged with the teeth 112 of the first member 110 in two states: the fully engaged state and the partially engaged state, as are second drive transmitting member 140. The sector parts are provided with contact surfaces with the ball parts, the contact surfaces of the sector parts and the sector parts serving as the first drive transmission members and the sector parts serving as the second drive transmission members are respectively arranged at different inclination angles relative to the radial direction, so that different meshing states are realized.

Example 5

Fig. 19 to 23 show the structure of example 5.

In embodiments 1-4, the teeth of the first member are each disposed on an inner circumferential surface thereof. In this embodiment, the teeth of the first member are disposed on the outer circumferential surface thereof.

As shown in fig. 20, 21 and 22, the end portion of the second member 120 defines a generally annular chamber 129, the outer circumferential surface of the first member 110 is provided with a plurality of teeth 112 along the axial direction, and the portion of the first member 110 provided with the teeth 112 is located in the chamber 129. A plurality of receiving grooves 121 are formed on a side wall of the chamber 129, an opening 1218 of the receiving groove 121 faces the teeth 112 of the first member 110, and a drive transmission member is disposed in the receiving groove 121. The ratchet teeth of the drive transfer member engage the teeth 112 on the first member 110 through the openings 1218 of the receiving slot.

In this embodiment, the number of the first drive transmission members 130 is 3, the number of the second drive transmission members 140 is 3, and the number of the accommodating grooves 121 is 6. Wherein the first drive transmitting member 130 and the second drive transmitting member 140 may be distributed alternately.

Each receiving groove 121 has a different inclination angle with respect to the radial direction from the contact surface 1213 of the drive transmission member, thereby achieving different engagement states of the drive transmission member with the teeth 112 of the first member 110, the principle of which is the same as that of embodiment 1, and the description thereof is omitted.

As shown in fig. 19, 20 and 23, the switching assembly includes an end cover 151, the end cover 151 is sleeved outside the second member 120, a stop post 1511 is disposed on one surface of the end cover 151 facing the accommodating groove 121, a plurality of limiting grooves 122 engaged with the stop post 1511 are disposed on the sidewall of the chamber 129, one limiting groove 122 is located between two adjacent accommodating grooves 121, and the stop post 1511 extends into the limiting groove 122. When the end cap 151 is rotated, the catch 1511 may slide within the retaining groove 122. The drive transfer members 130, 140 are at least partially disposed within the retaining grooves 122 when engaged with the teeth 112. When the catch 1511 moves to the end of the retaining groove 122, it may contact the drive transmission members 130, 140, thereby driving the corresponding drive transmission members 130, 140 out of engagement with the teeth 112.

A hole 1204 is arranged on the side wall of the second member 120 facing the end cover 151, a locking ball 124 is arranged in the hole 1204, a first concave part 1512, a second concave part 1513 and a third concave part 1514 are arranged on the end cover 151 at positions opposite to the through holes in sequence, and when the end cover 151 is rotated and different concave parts are opposite to the through holes, the locking ball falls into the corresponding concave part, so that the position of the end cover can be locked. For example, with the locking ball 124 in the first recess 1512, the catch 1511 contacts the first drive transmitting member 130 such that the first drive transmitting member 130 is disengaged from the teeth 112 and is no longer effective to transmit motion, i.e., is not in the active state; with the locking ball 124 in the third recess 1514, the catch 1511 contacts the second drive transmitting member 140 such that the second drive transmitting member 140 is disengaged from the teeth 112 and is no longer operative to transmit motion, i.e., is not in an operative state; when the lock ball 124 is located in the second recess 1513, the catch 1511 is not in contact with both the first and second drive transmission members. A second resilient member (not shown) is disposed between the locking ball 124 and the aperture 1204.

The drive transmission member is connected to the first elastic element 125 in the receiving groove 121, and the first elastic element 125 can restore the drive transmission member.

The above embodiment has described the ratchet that this application provided, through setting drive transmission mechanism to have different engagement state with the tooth of first component, under the unchangeable situation of assurance tooth number, increased driven gear, improved transmission efficiency, reduced and rocked, guaranteed intensity, and make the resistance when gyration littleer, be favorable to reducing wearing and tearing. This ratchet can also realize two-way switching through switching over the subassembly, can increase the transmission gear in two directions homoenergetic. It should be understood that the ratchet mechanism is not limited to the above-described embodiments, and that various modifications and changes can be made by those skilled in the art without inventive step in the spirit of the present application, which are within the scope of the appended claims.

Two, ratchet wrench

The first section describes the ratchet mechanism of the present application and in this section the use of the ratchet mechanism in a wrench will be described.

As shown in fig. 24 and 25, the wrench 200 includes a handle 220, the end of which is provided with a corresponding wrench head 210. The wrench head 210 is provided with a ratchet mechanism as described in any of embodiments 1 to 4. Wherein the first member 110 of the ratchet mechanism may be provided integrally with the handle 220. In the illustrated example, the wrench head 210 is provided with an output 230, and the output 230 may be connected to a variety of different sleeves. The output 230 is coupled within the central bore 1202 of the second member 120 of the ratchet mechanism for rotation with the second member 120. When the user operates the handle 220, a torque is applied to the handle 220 to drive the first member 110 to rotate, and the motion is transmitted to the second member 120 by driving the transmission member to drive the output end 230 to rotate together, so as to achieve the purpose of outputting the torque. When the user rotates the handle 220 in the opposite direction, the ratchet mechanism rotates, and the second member 120 does not rotate, so that the hand of the user can be reset, and the fastener can be continuously screwed in a narrow space.

It should be understood that the wrench head 210 may also be configured as an open type, i.e., the central bore 1202 of the second member 120 is configured as a polygonal through bore that can be directly engaged by a fastener, and can receive a nut/fastener head, such that the wrench can apply a torque to the nut/fastener head. In addition, a wrench head 210 may be provided at each end of the handle 220.

Third, the screwdriver

In this section, the use of a ratchet mechanism in a screwdriver is described.

As shown in fig. 26 and 27, the screwdriver 300 includes a handle 310, the handle 310 is connected to the driving member of the ratchet mechanism, the output member of the ratchet mechanism is connected to a shaft 320, and the end of the shaft 320 may be provided with a sleeve or an output end connected to a screwdriver bit 330. Preferably, the ratchet mechanism is the structure described in embodiment 5, and the outer circumferential surface of the first member 110 is provided with teeth and is located in the cavity 129 of the second member 120. The second member 120 is connected to a handle 310. The shaft 320 is connected to the first member 110 to rotate with the first member 110. The shaft 320 may be integrally formed with the first member 110.

When the user uses the handle 310, a torque is applied to drive the second member 120 to rotate, and the transmission member is driven to transmit the motion to the first member 110, so that the first member 110 rotates with the shaft 320, and a torque is output. When the user drives the handle 310 to rotate in the reverse direction, the ratchet mechanism rotates and the shaft 320 does not rotate.

The connection between the second member 120 and the handle 310 can be any one of the known cases, for example, a blind hole is provided in the handle 310, a slot 311 is provided on the sidewall of the blind hole, the second member 120 can be inserted into the blind hole, and a protrusion 1203 matching with the slot 311 is provided on the second member 120, so that the torsion of the handle 310 can be transmitted to the second member by matching the slot 311 with the protrusion 1203. Other connections that enable the handle 310 to transmit torque to the second member 120 are suitable for use in this embodiment.

The foregoing detailed description of the preferred embodiments of the present application. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the concepts of the present application should be within the scope of protection defined by the claims.

Claims (20)

1. A ratchet mechanism, comprising:

a first member having an annular surface with a plurality of teeth disposed thereon parallel to an axial direction thereof;

a second member configured to be rotatable with respect to a circumferential direction of the annular surface;

at least two first drive transfer members disposed on the second member, each of the first drive transfer members including at least one ratchet tooth, the first drive transfer members configured to be engageable with the teeth of the first member to transfer motion between the first member and the second member, wherein the ratchet tooth of each of the first drive transfer members is in a different state of engagement than the teeth of the first member.

2. The ratchet mechanism according to claim 1, further comprising at least two second drive transmitting members provided on the second member, each of the second drive transmitting members including at least one ratchet tooth, the second drive transmitting members being configured to be engageable with the teeth of the first member to transmit unidirectional motion between the first member and the second member, wherein the ratchet tooth of each of the second drive transmitting members is in a different state of engagement from the teeth of the first member;

wherein, when the first member and the second member move relative to the first direction, the first drive transmitting member is in an operating state and the second drive transmitting member is in an inoperative state; when the first member and the second member move relative to the second direction, the second drive transmission member is in an operating state, and the first drive transmission member is in an inoperative state.

3. The ratchet mechanism according to claim 2, wherein said engaged state includes a state in which said drive transmission member is completely engaged with said teeth of said first member, and a state in which said drive transmission member is partially engaged with said teeth of said first member.

4. The ratchet mechanism of claim 2, wherein said second member includes a plurality of receiving slots for supporting said drive transfer member, at least one of said drive transfer members being disposed within said receiving slots, said receiving slots having openings facing said teeth of said first member, at least a portion of said drive transfer member passing through said openings such that said ratchet teeth of said drive transfer member can engage said teeth of said first member; an elastic element is connected to the drive transmitting member.

5. The ratchet mechanism according to claim 4, wherein an inclination angle of a contact surface of each of said receiving grooves with said drive transmission member received therein with respect to a radial direction of said annular surface is different so that said drive transmission member has a different lead angle to differ from an engagement state of said teeth of said first member.

6. The ratchet mechanism of claim 5, wherein said teeth of said first member are located on an inner circumferential surface of said annular surface and said second member is located in a cavity defined by said annular surface.

7. The ratchet mechanism of claim 6, wherein each of said receiving slots has first and second oppositely disposed openings, one of said first drive transmitting members being located at said first opening and one of said second drive transmitting members being located at said second opening; a first elastic element is disposed between the first drive transmitting member and the second drive transmitting member.

8. The ratchet mechanism of claim 6, wherein each of said drive transfer members has first and second oppositely disposed sides, said ratchet teeth being disposed on said first side, said second side being located within said receiving slot, said first and second sides having a ramped surface therebetween, said ramped surface contacting said contact surface of said receiving slot; one drive transmission member is disposed in each of the receiving grooves, and a first elastic element is disposed between the drive transmission member and a side wall of the receiving groove.

9. The ratchet mechanism according to claim 6, further comprising an annular support provided at an end of the second member, wherein an elongated through hole is provided at a position corresponding to each of the drive transmission members on the annular support, and one end of the drive transmission member extends into the elongated through hole, and the angle of inclination of the elongated through hole with respect to the radial direction is the same as that of the corresponding contact surface.

10. The ratchet mechanism according to claim 6, further comprising a switching assembly provided on the second member, the switching assembly being configured to be able to switch the operating state of the first drive transmitting member and the second drive transmitting member.

11. The ratchet mechanism of claim 10, wherein the switching assembly includes an end cap disposed at an end of the second member and configured to be rotatable relative to the second member to a first position and a second position; at least two blocking pieces are arranged on one side, facing the second component, of the end cover; when the end cover is located at the first position, each baffle sheet contacts with one corresponding first drive transmission member so as to enable the first drive transmission member to be in a non-working state; when the end cover is located at the second position, each baffle sheet contacts with one corresponding second drive transmission member respectively so as to enable the second drive transmission member to be in the non-working state.

12. The ratchet mechanism according to claim 11, wherein a limiting portion is protrudingly provided on a side of the end cap facing the second member, and a limiting groove is provided on the second member to be engaged with the limiting portion, the limiting portion being configured to slide in the limiting groove when the end cap is rotated; two ends of the limiting groove can block the movement of the limiting part, so that the end cover is located at the first position or the second position.

13. The ratchet mechanism according to claim 12, wherein the stopper portion includes a first recess and a second recess arranged in series, the second member is provided with a locking groove communicating with the stopper groove, and a locking ball is provided in the locking groove; when the end cover is located at the first position, the first concave part is opposite to the locking groove, so that the locking ball falls into the first concave part; when the end cover is located at the second position, the second concave part is opposite to the locking groove, so that the locking ball falls into the second concave part.

14. The ratchet mechanism according to claim 11, wherein a side of the end cap facing the second member is provided with a circular boss, and the second member is provided with a circular recess engaged with the circular boss; the circular boss is configured to slide within the circular recess when the end cap is rotated; the edge of circular boss is provided with spacing portion toward radial protrusion, the lateral wall of circular depressed part is provided with spacing recess, spacing portion can slide in the spacing recess, two tip of spacing recess can block the motion of spacing portion, make the end cover is located first position or the second position.

15. The ratchet mechanism of claim 14, wherein said side wall of said circular recess has a first groove and a second groove, said circular boss has a transverse slot, and said transverse slot has a locking ball disposed therein; when the end cover is located at the first position, the transverse groove is communicated with the first groove, and the locking ball falls into the first groove; when the end cover is located at the second position, the transverse groove is communicated with the second groove, and the locking ball falls into the second groove.

16. The ratchet mechanism of claim 2, wherein the first member defines a chamber, an inner surface of the chamber forming the annular surface;

the ratchet mechanism comprises two fan-shaped parts which are oppositely arranged, and the fan-shaped parts are positioned in the cavity; one end of each of the sector parts forms the first drive transmission member and the other end forms the second drive transmission member; an elastic element is arranged between the fan-shaped parts;

the middle part of each fan-shaped part is provided with a through hole, and the second component is provided with a columnar part which can correspondingly penetrate through the through hole.

17. The ratchet mechanism of claim 16, further comprising a support member including an annular portion and a shaft portion extending from the annular portion in a direction toward the first member and located between the two sector pieces; the annular part is provided with an arc-shaped hole corresponding to the columnar part, and the columnar part penetrates through the arc-shaped hole and then enters the through hole; the shaft part is provided with a limiting hole which penetrates through the shaft part along the radial direction, two opposite spherical parts are arranged in the limiting hole, and the elastic element is arranged between the two spherical parts; the two spherical parts may respectively contact the corresponding sector parts and are configured to drive the corresponding sector parts to rotate around the columnar portion.

18. The ratchet mechanism of claim 5, wherein the teeth of the first member are located on an outer circumferential surface of the annular surface; the second member defines a chamber within which the portion of the first member on which the teeth are disposed is located.

19. The ratchet mechanism according to claim 18, further comprising an end cap disposed over the second member, wherein a plurality of retaining posts are disposed on a surface of the end cap facing the receiving slots, and a retaining slot is disposed between adjacent receiving slots, and the retaining posts are slidable in the corresponding retaining slots; each accommodating groove receives one drive transmission member, and part of the drive transmission member is positioned in the limiting groove, so that the stop pillar contacts and drives the drive transmission member when moving to the end part of the limiting groove, and the drive transmission member is in a non-working state.

20. A hand tool, wherein the hand tool is a wrench or screwdriver, the hand tool comprising a handle, and a ratchet mechanism as claimed in any one of claims 1-19 connected to the handle; the handle is configured to drive the first member or the second member of the ratchet mechanism to rotate under an external force.

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