Reverse rotation limiting mechanism and one-way rotation device

Abstract

The invention provides a reverse rotation limiting mechanism and one-way rotating equipment, the reverse rotation limiting mechanism comprises a rotating shaft piece, a limiting disc, a direction stopping pin and a direction stopping driving piece, the rotating shaft piece is arranged in a gear hole of the limiting disc in a penetrating mode, and a containing groove is formed in the rotating shaft piece; one-way rotation of a part installed on the rotating shaft piece is achieved through matching of the direction stopping pin which is arranged in the containing groove and can move in the radial direction of the rotating shaft and the limiting teeth of the gear hole, namely, the direction stopping pin is arranged on the inner ring of the limiting disc, the space outside the limiting disc does not need to be occupied, the space inside the rotating shaft piece is utilized through arrangement and movement of the direction stopping pin, and the rotating shaft piece can rotate more stably. The distance between the limiting disc and the rotating shaft piece can be set to be very small, so that compared with a traditional ratchet wheel assembly, the overall size of the reverse rotation limiting mechanism is greatly reduced, the one-way rotating function can be practically achieved, and the reverse rotation limiting mechanism can be suitable for small equipment with the portable requirement and the handheld operation requirement. In addition, the reverse rotation limiting mechanism further has the advantages of being simple in structure, small in part number and easy to assemble and maintain.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of limiting mechanisms, and particularly relates to a reverse rotation limiting mechanism and a one-way rotating device. BACKGROUND

[0002] In some devices, a rotating part capable of one-way rotation is needed, that is, under the driving of a corresponding driving mechanism, the rotating part needs to be able to rotate in a predetermined working rotation direction substantially without obstruction, while the rotation in the direction opposite to the working rotation direction is limited or completely prevented.

[0003] In the prior art, one-way rotation of the rotating part is generally realized by setting a one-way bearing or a ratchet assembly between the driving mechanism and the rotating part. However, the one-way bearing itself has a high cost, and the one-way bearing needs to be keyed with a rotating shaft when installed, so that an additional key groove needs to be processed, the processing technology is relatively complex, and the cost is further increased, so that the use of the one-way bearing is limited, especially in small-sized civil devices with low prices. The ratchet assembly generally includes a disc body, a rotatable ratchet wheel installed in the middle of the disc body, and one or more pawls installed at the edge of the disc body for cooperating with the teeth on the ratchet wheel to realize one-way rotation. Since the pawl is arranged beside the ratchet wheel, the pawl and the ratchet wheel are completely separate components, and the pawl needs to rotate within a certain range, so that the overall installation and operation space of the ratchet assembly is relatively large, and therefore the ratchet assembly cannot be used in many devices, especially in small-sized devices that need to be portable and need to be operated by hand, which usually do not have the space conditions for installing the ratchet assembly. At present, in such small-sized devices, the high-cost one-way bearing has to be used. SUMMARY

[0004] The present application is carried out to solve the above problems, and aims to provide a reverse rotation limiting mechanism with a very small overall size, low cost and easy assembly and maintenance, and a one-way rotating device adopting the mechanism. The present application adopts the following technical scheme:

[0005] The present application provides a reverse limiting mechanism for enabling a component mounted thereon to rotate in one direction, which has the technical features comprising: a rotating shaft member for driving the component to rotate, having a receiving groove extending along a radial direction thereof; a limiting disc having a gear hole with a plurality of limiting teeth, the rotating shaft member being arranged in the gear hole and the receiving groove facing the limiting teeth; a radial stop pin movably arranged in the receiving groove along the radial direction, having a fitting portion at one end thereof outside the receiving groove for cooperating with the limiting teeth to enable the rotating shaft member to rotate in one direction; and a radial stop driving member for driving the radial stop pin to move outside the receiving groove, wherein the fitting portion has a rotating fitting surface inclined relative to the radial direction for abutting against the limiting teeth when the rotating shaft member is driven by a forward driving force, thereby pressing the radial stop pin towards the receiving groove so that the rotating shaft member can rotate in the forward direction, and a radial stop fitting surface parallel to the radial direction for abutting against the limiting teeth when the rotating shaft member is driven by a reverse driving force, thereby preventing the rotating shaft member from rotating in the reverse direction.

[0006] The reverse limiting mechanism provided by the present application can further have the technical features that a limiting groove is formed between two adjacent limiting teeth, the limiting groove has a first side surface and a second side surface, both the first side surface and the second side surface are perpendicular to a circumferential direction of the gear hole, the first side surface is used for abutting against the radial stop fitting surface when the rotating shaft member is driven by the reverse driving force, thereby preventing the reverse rotation, and the second side surface is used for abutting against the rotating fitting surface when the rotating shaft member is driven by the forward driving force, thereby enabling the radial stop pin to be pressed towards the receiving groove by a component force of the forward driving force along the radial direction.

[0007] The reverse limiting mechanism provided by the present application can further have the technical features that the first side surface is parallel to the radial direction, the second side surface is inclined relative to the corresponding first side surface by an angle of 30°-45°, and the rotating fitting surface is inclined relative to the radial direction by an angle of 10°-60°.

[0008] The reverse limiting mechanism provided by the present application can further have the technical features that both the first side surface and the second side surface are inclined relative to the radial direction, and the first side surface and the second side surface are respectively inclined to two sides relative to a first radial direction of the rotating shaft member passing through an intersection of the first side surface and the second side surface, the first side surface is inclined relative to the first radial direction by an angle of 5°-20°, the second side surface is inclined relative to the first radial direction by an angle of 30°-45°, and the rotating fitting surface is inclined relative to the radial direction by an angle of 10°-60°.

[0009] The reverse limiting mechanism provided by the application can also have the following technical features: the first side surface and the second side surface are both inclined relative to the radial direction, the first side surface and the second side surface are inclined to the same side relative to a first radial direction of the rotating shaft through the intersection of the first side surface and the second side surface, the inclination angle of the first side surface relative to the first radial direction is 5-20°, the inclination angle of the second side surface relative to the first radial direction is 30-45°, and the inclination angle of the rotating matching surface relative to the radial direction is 10-60°.

[0010] The reverse limiting mechanism provided by the application can also have the following technical features: the first side surface and the second side surface are both parallel to the radial direction, and the inclination angle of the rotating matching surface relative to the radial direction is 10-60°.

[0011] The reverse limiting mechanism provided by the application can also have the following technical features: the direction-stopping pin is in a columnar shape, the side surface thereof comprises two parallel planes and two circular arc surfaces, one of the circular arc surfaces is the direction-stopping matching surface, and the cross-sectional shape of the accommodating groove matches the direction-stopping pin.

[0012] The reverse limiting mechanism provided by the application can also have the following technical features: the direction-stopping pin is in a columnar shape, the side surface thereof comprises one cylindrical surface and one plane, the cylindrical surface is the direction-stopping matching surface, and the cross-sectional shape of the accommodating groove matches the direction-stopping pin.

[0013] The reverse limiting mechanism provided by the application can also have the following technical features: the direction-stopping pin comprises a metal piece made of wear-resistant metal material and in a columnar shape, one end of the metal piece has a plane inclined relative to the axial direction, the side surface of the metal piece is the direction-stopping matching surface, and a noise-reducing layer made of wear-resistant and impact-resistant modified material is arranged on the plane of the metal piece, the outer surface of the noise-reducing layer is the rotating matching surface.

[0014] The reverse limiting mechanism provided by the application can also have the following technical features: the direction-stopping driving piece is an elastic piece arranged in the accommodating groove, one end of the elastic piece abuts against the groove bottom of the accommodating groove, the other end of the elastic piece abuts against the direction-stopping pin, and the elastic piece is any one of a spring, a bent metal sheet belt, a columnar rubber part and a columnar rubber-plastic part.

[0015] The reverse limiting mechanism also has the following technical features: the rotating shaft member includes a rotating shaft installation disc part in a disc shape for installing the rotating shaft member on a driving mechanism, and a rotating shaft column part coaxially extending from the middle of one surface of the rotating shaft installation disc part perpendicularly to the rotating shaft installation disc part in a column shape, the accommodating groove is arranged in the middle of the rotating shaft column part in the axial direction, the width of the accommodating groove is less than half the diameter of the rotating shaft column part, the depth of the accommodating groove is less than 3 / 4 of the diameter of the rotating shaft column part, the limiting disc includes a main body cover part in a circular cover shape, the gear hole is coaxially arranged in the middle of the top surface of the main body cover part, and a plurality of installation block parts extend outward from the side surface of the main body cover part for installing the limiting disc on the driving mechanism.

[0016] The reverse limiting mechanism also has the following technical features: the rotating shaft member includes a rotating shaft installation disc part in a disc shape for installing the rotating shaft member on a driving mechanism, and a rotating shaft column part coaxially extending from the middle of one surface of the rotating shaft installation disc part perpendicularly to the rotating shaft installation disc part in a column shape, the accommodating groove is arranged in the middle of the rotating shaft column part in the axial direction, the width of the accommodating groove is less than half the diameter of the rotating shaft column part, the depth of the accommodating groove is less than 3 / 4 of the diameter of the rotating shaft column part, the limiting disc includes a main body cover part in a circular cover shape, the gear hole is coaxially arranged in the middle of the top surface of the main body cover part, and a plurality of installation block parts extend outward from the side surface of the main body cover part for installing the limiting disc on the driving mechanism.

[0017] Effects of the Invention

[0018] The reverse limiting mechanism and the one-way rotating device according to the present application include a rotating shaft member, a limiting disc with a gear hole, a direction stopping pin and a direction stopping driving member, the rotating shaft member is arranged in the gear hole of the limiting disc, the accommodating groove is arranged in the rotating shaft member, the one-way rotation of the component installed on the rotating shaft member is realized by the cooperation of the direction stopping pin arranged in the accommodating groove and movable along the radial direction of the rotating shaft and the limiting disc and the plurality of limiting teeth of the gear hole, that is, the direction stopping pin is arranged in the inner ring of the limiting disc, without occupying the space outside the limiting disc, and the arrangement and movement of the direction stopping pin utilize the space inside the rotating shaft member, the spacing between the limiting disc and the rotating shaft member can be arranged to be very small, therefore, compared with the traditional ratchet assembly, the overall size of the reverse limiting mechanism of the present application is greatly reduced, and the function of one-way rotation can also be realized, which can be applied to small devices with the needs of portability and handheld operation. In addition, the reverse limiting mechanism of the present application also has the advantages of simple structure, less components, easy assembly and maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a perspective view of the reverse limiting mechanism in the first embodiment of the present application;

[0020] Figure 2 is an exploded view of the reverse limiting mechanism in the first embodiment of the present application;

[0021] Figure 3 is a sectional view of the reverse limiting mechanism in the first embodiment of the present application;

[0022] Figure 4is a sectional view of the rotating shaft in the embodiment one of the present application;

[0023] Figure 5 is a perspective view of the limiting disc at different angles in the embodiment one of the present application;

[0024] Figure 6 is an orthographic projection view of the limiting disc in the embodiment one of the present application;

[0025] Figure 7 is Figure 6 is an enlarged view of the inner part of the middle frame A;

[0026] Figure 8 is a perspective view of the stop pin in the embodiment one of the present application;

[0027] Figure 9 is a side view of the stop pin in the embodiment one of the present application;

[0028] Figure 10 is a sectional view of the stop pin in the embodiment one of the present application;

[0029] Figure 11 is a sectional view of the reverse limiting mechanism in use in the embodiment one of the present application;

[0030] Figure 12 is a perspective view of the one-way rotating device in the embodiment one of the present application;

[0031] Figure 13 is a sectional view of the one-way rotating device in the embodiment one of the present application;

[0032] Figure 14 is a perspective view of the stop pin in the embodiment two of the present application;

[0033] Figure 15 is an orthographic projection view of the stop pin in the embodiment two of the present application;

[0034] Figure 16 is a structural schematic view of the stop pin in the embodiment three of the present application;

[0035] Figure 17 is a structural schematic view of the reverse limiting mechanism in use in the embodiment three of the present application;

[0036] Figure 18 is an orthographic projection view of the limiting disc in the first modified example of the present application;

[0037] Figure 19 is an orthographic projection view of the limiting disc in the second modified example of the present application;

[0038] Figure 20 is an orthographic projection view of the limiting disc in the third modified example of the present application;

[0039] Figure 21is a perspective view of the reverse limiting mechanism in the fourth embodiment of the present application.

[0040] Reference signs:

[0041] Reverse limiting mechanism 10; rotating shaft member 11; rotating shaft mounting disc part 111; rotating shaft member mounting hole 1111; circular shallow groove 1112; centering groove 1113; rotating shaft column part 112; accommodating groove 1121; first spring limiting groove 1122; driving surface 1123; rotating shaft end part 113; first ring groove 114; second ring groove 115; limiting disc 12; main body cover part 121; gear hole 1211; limiting tooth 1212; limiting groove 1213; first side surface 1213a; second side surface 1213b; circular arc bottom surface 1213c; clearance notch 1214; mounting block part 122; outer end surface 122a; limiting disc mounting hole 1221; anti-rotation pin 13; anti-rotation pin main body part 131; first flat surface 131a; second flat surface 131b; first circular arc surface 131c; second circular arc surface 131d; second spring limiting groove 1311; fitting part 132; third flat surface 132a; fourth flat surface 132b; third circular arc surface (anti-rotation fitting surface) 132c; fourth circular arc surface 132d; outer end surface (rotation fitting surface) 132e; noise reduction layer 133; outer surface 133a; cylindrical surface 13a; flat surface 13b; anti-rotation driving member 14; bent part 141; one-way rotation device 100; rotating part 20; cam 21; cam disc 211; pushing column 212; cam connecting member 22; driving mechanism 30; motor 31; speed reducer 32; third stage gear 323; working rotation direction D1. DETAILED DESCRIPTION

[0042] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the reverse limiting mechanism and the one-way rotation device of the present application are specifically described below in combination with embodiments and drawings.

[0043] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0044] <Embodiment One>

[0045] Figure 1 is a perspective view of the reverse limiting mechanism in the fourth embodiment of the present application. Figure 2is a sectional view of the reverse limiting mechanism in the embodiment, Figure 3 is an exploded view of the reverse limiting mechanism in the embodiment.

[0046] As shown in Figures 1 to 3 , the reverse limiting mechanism 10 comprises a rotating shaft member 11, a limiting disc 12, a direction stopping pin 13 and a direction stopping driving member 14.

[0047] Figure 4 is a sectional view of the rotating shaft member in the embodiment.

[0048] As shown in Figure 3 and Figure 4 , the rotating shaft member 11 comprises a rotating shaft mounting disc part 111, a rotating shaft column part 112 and a rotating shaft end part 113 which are integrally formed and coaxially arranged.

[0049] The rotating shaft mounting disc part 111 is in the shape of a disc as a whole, and a plurality of through rotating shaft mounting holes 1111 (four in the embodiment) are uniformly distributed along the circumference of the edge part of the rotating shaft mounting disc part 111, for mounting the rotating shaft member 11 on a rotating driving mechanism, such as a motor, by means of fasteners. A circular shallow groove 1112 and a centering groove 1113 are formed in the middle of one surface (the surface not connected with the rotating shaft column part 112) of the rotating shaft mounting disc part 111. The centering groove 1113 is arranged in the middle of the groove bottom of the circular shallow groove 1112, and the groove bottom of the centering groove 1113 is in the shape of a cone, which is coaxial with the rotating shaft member 11.

[0050] The rotating shaft column part 112 is in the shape of a cylinder as a whole, and extends perpendicularly to the surface direction of the rotating shaft mounting disc part 111 from the middle of the other surface of the rotating shaft mounting disc part 111, and is coaxially arranged with the rotating shaft mounting disc part 111. A receiving groove 1121 for receiving the direction stopping pin 13 is formed in the middle of the axial direction of the rotating shaft column part 112. The extending direction of the receiving groove 1121 is the radial direction of the rotating shaft column part 112, and the extending length of the receiving groove 1121 is about 3 / 4 of the diameter of the rotating shaft column part 112, and the groove opening of the receiving groove 1121 is located on the side surface of the rotating shaft column part 112, i.e. the waist groove; the cross section of the receiving groove 1121 in the extending direction is in the shape of a rounded rectangle, and the length direction of the cross section is perpendicular to the axial direction of the rotating shaft column part 112, and the length is less than half of the diameter of the rotating shaft column part 112. The groove bottom of the receiving groove 1121 has a first spring limiting groove 1122, which is a circular groove with a shallow depth, and the diameter of the first spring limiting groove 1122 is less than the length and width of the receiving groove 1121. In addition, the side surface of the rotating shaft column part 112 close to one end of the rotating shaft end part 113 has two shallow notches, and two driving surfaces 1123 are formed on the side surface of the one end, and the two driving surfaces 1123 are both flat and parallel to each other, and are located on both sides in the radial direction of the rotating shaft column part 112. The length direction of the driving surface 1123 is the axial direction of the rotating shaft column part 112, and the length of the driving surface 1123 is less than half of the length of the rotating shaft column part 112.

[0051] The shaft end 113 is generally cylindrical in shape and has a smaller diameter than the shaft column 112. The axial length of the shaft end 113 is also much smaller than the length of the shaft column 112. The edge of the outer end of the shaft end 113 is chamfered. The upper end of the shaft end 113 and the shaft column 112 (i.e. the end having the driving surface 1123) is used to fit the rotating part.

[0052] In addition, a first annular groove 114 is formed between the shaft column 112 and the shaft mounting disc 111. The cross-section of the first annular groove 114 in the circumferential direction is generally trapezoidal. A second annular groove 115 is formed between the shaft column 112 and the shaft end 113. The cross-section of the second annular groove 115 in the circumferential direction is also generally trapezoidal.

[0053] Figure 5 is a perspective view of the limiting disc in the present embodiment, Figure 6 is an orthographic projection view of the limiting disc in the present embodiment.

[0054] As shown in Figure 3 , Figure 5 and Figure 6 , the limiting disc 12 comprises a main cover portion 121 and a plurality of mounting block portions 122 which are integrally formed.

[0055] The main cover portion 121 is generally circular in shape. A gear hole 1211 is formed in the middle of the top surface of the main cover portion 121. The smallest diameter of the gear hole 1211 is larger than the outer diameter of the shaft column 112. The edge of the gear hole 1211 has a plurality of limiting teeth 1212 arranged in sequence along one circumference. A limiting groove 1213 is formed between two adjacent limiting teeth 1212. The limiting groove 1213 is used to cooperate with the stop pin 13 to achieve one-way rotation. The shape and size of each limiting tooth 1212 are the same and match the shape and size of the outer end of the stop pin 13. The pitch between two adjacent limiting teeth 1212 is also the same. In the present embodiment, there are eighteen limiting teeth 1212 and eighteen limiting grooves 1213.

[0056] Figure 7 is an enlarged view of the inner portion of the middle frame A. Figure 6

[0057] As shown in Figure 7 , in the present embodiment, each limiting tooth 1212 is a helical tooth. All the limiting teeth 1212 are inclined in the same circumferential direction, which is the working rotation direction of the shaft member 11 when in use.

[0058] ​As viewed in the axial direction of the limit disc 12, the cross-sectional shape of the limit tooth 1212 is substantially a trapezoid with rounded corners, and the short side of the trapezoid faces the center of the limit disc 12. As viewed in the axial direction of the limit disc 12, the cross-sectional shape of each limit groove 1213 is substantially a triangle with rounded corners, and the limit groove 1213 has a first side surface 1213a and a second side surface 1213b, and a rounded corner bottom surface 1213c connecting the two side surfaces, both of the side surfaces are parallel to the axial direction of the limit disc 12, wherein the plane on which the first side surface 1213a lies passes through the center axis 12A of the limit disc 12, and the included angle between the first side surface 1213a and the second side surface 1213b is an acute angle, and the angle of the included angle is 30° to 45°, and in the embodiment, the angle of the included angle is about 45°.

[0059] It can be understood that the first side surface 1213a and the second side surface 1213b are also two side surfaces (tooth surfaces) of the limit tooth 1212. The outer end surface of the limit tooth 1212 (i.e. the end surface facing the center axis of the limit disc 12) is substantially perpendicular to the radial direction of the limit disc 12.

[0060] The mounting block portion 122 further extends outwardly from the side surface of the main cover portion 121, and the extending direction is the radial direction of the main cover portion 121. The mounting block portion 122 is substantially a cuboid block with rounded corners, and a through limit disc mounting hole 1221 is formed in each mounting block portion 122, and the through direction of the limit disc mounting hole 1221 is the axial direction of the limit disc 12. The connecting position between the mounting block portion 122 and the side surface of the main cover portion 121 is in a circular arc shape. In addition, in the embodiment, the outer end surface 122a of the mounting block portion 122 is perpendicular to the axial direction of the limit disc 12, and the outer end surface 122a has a small arc. The upper end edge of the main cover portion 121 also has a plurality of accommodation notches 1214, which are respectively located beside each mounting block portion 122, and the accommodation notches 1214 are circular arc notches, so that the limit disc mounting hole 1221 can be arranged closer to the main cover portion 121.

[0061] Figure 8 is a perspective view of the stop pin in the embodiment, Figure 9 is a side view of the stop pin in the embodiment, Figure 10 is a sectional view of the stop pin in the embodiment.

[0062] As Figures 8 to 10 shown, the stop pin 13 includes an integrally formed stop pin main body portion 131 and a fitting portion 132.

[0063] The stop pin body portion 131 is columnar, and the axial cross section thereof has two mutually parallel edge portions and two outwardly convex circular arc edge portions. Thus, the four side surfaces of the stop pin body portion 131 are respectively a first plane 131a, a second plane 131b, a first circular arc surface 131c, and a second circular arc surface 131d, all of which are parallel to the axial direction of the stop pin 13. The distance between the first plane 131a and the second plane 131b (i.e., the thickness of the stop pin 13) is substantially the same as the height of the accommodating groove 1121, and the maximum distance between the first circular arc surface 131c and the second circular arc surface 131d is slightly smaller than the width of the accommodating groove 1121.

[0064] The stop pin body portion 131 is columnar, and the axial cross section thereof has two mutually parallel edge portions and two outwardly convex circular arc edge portions. Thus, the four side surfaces of the stop pin body portion 131 are respectively a first plane 131a, a second plane 131b, a first circular arc surface 131c, and a second circular arc surface 131d, all of which are parallel to the axial direction of the stop pin 13. The distance between the first plane 131a and the second plane 131b (i.e., the thickness of the stop pin 13) is substantially the same as the height of the accommodating groove 1121, and the maximum distance between the first circular arc surface 131c and the second circular arc surface 131d is slightly smaller than the width of the accommodating groove 1121.

[0065] The fitting portion 132 extends axially from the other end of the stop pin body portion 131. The fitting portion 132 is substantially wedge-shaped, and its four side surfaces are respectively a third plane 132a, a fourth plane 132b, a third circular arc surface 132c, and a fourth circular arc surface 132d, which are coplanar with the above-mentioned four side surfaces of the stop pin body portion 131. In addition, the fitting portion 132 has an outer end surface 132e, which is a plane and has two mutually parallel edge portions and two outwardly convex circular arc edge portions. The outer end surface 132e is inclined with respect to the axial direction of the stop pin body portion 131, and the inclination angle with respect to the axial direction is 30° to 80°. In use, the inclination angle of the outer end surface 132e with respect to the radial direction of the rotating shaft is 30° to 80°, and the inclination angle with respect to the circumferential tangent of the gear hole 1211 is 10° to 60°. In this embodiment, the inclination angle of the outer end surface 132e with respect to the axial direction of the stop pin body portion 131 is 60°.

[0066] The outer end surface 132e of the fitting portion 132 is used to cooperate with the limiting groove 1213 to achieve free rotation of the rotating shaft member 11 in the above-mentioned working rotation direction D1, and the third circular arc surface 132c is used to cooperate with the limiting groove 1213 to prevent rotation in the opposite direction of the working rotation direction D1. For the sake of description, the outer end surface 132e is referred to as the rotation cooperation surface 132e, and the third circular arc surface 132c is referred to as the stop cooperation surface 132c.

[0067] The stop pin 13 is a metal piece, which has wear resistance by itself or by heat treatment process, so that the stop pin 13 will not be worn obviously during long-term use, thereby improving the stability of the reverse limiting mechanism 10 during operation. In the embodiment, the stop pin 13 is a ferrous piece, which has wear resistance by heat treatment process. In an alternative, the stop pin 13 can also be made of a high-molecular wear-resistant and impact-resistant modified material, which has certain wear resistance and can also make the noise of the reverse limiting mechanism 10 during operation smaller.

[0068] The stop driving piece 14 is used to drive the stop pin 13 to move along the length direction thereof towards the outside of the accommodating groove 1121, so as to press the fitting part 132 of the stop pin 13 in one of the limiting grooves 1213. In the embodiment, the stop driving piece 14 is a spring.

[0069] After assembly, the shaft column part 112 of the rotating shaft piece 11 passes through the gear hole 1211 in the middle of the limiting disc 12, the rotating shaft piece 11 and the limiting disc 12 are coaxially arranged, and in the radial direction of both, the accommodating groove 1121 is substantially aligned with the gear hole 1211 (i.e. from the perspective of the Figure 3 The stop pin main body part 131 of the stop pin 13 is embedded in the accommodating groove 1121, and the two sides in the width direction of the stop pin main body part 131 and the four corners have a certain gap with the inner wall of the accommodating groove 1121, the fitting part 132 of the stop pin 13 is located outside the accommodating groove 1121, and the inclination direction of the rotation fitting surface 132e of the fitting part 132 is consistent with the inclination direction of the limiting tooth 1212 and the limiting groove 1213. The stop pin 13 can move along the length direction thereof (i.e. the radial direction of the rotating shaft piece 11 and the limiting disc 12). The stop driving piece 14 (spring) is arranged in the accommodating groove 1121, one end of which is embedded in the first spring limiting groove 1122 of the rotating shaft piece 11 and abuts against the groove bottom, and the other end is embedded in the second spring limiting groove 1311 of the stop pin 13 and abuts against the groove bottom.

[0070] Figure 11 is a sectional view of the reverse limiting mechanism in use in the embodiment.

[0071] As shown in Figure 11 , under the action of the spring, the stop pin 13 is pushed out along the length direction thereof (i.e. the radial direction of the rotating shaft piece 11 and the limiting disc 12) towards the outside of the accommodating groove 1121, the fitting part 132 of the stop pin 13 is pressed towards one of the limiting grooves 1213, the wedge-shaped outer end part of the fitting part 132 is embedded in the limiting groove 1213, the stop fitting surface 132c thereof faces the first side surface 1213a (a straight surface parallel to the radial direction), and the rotation fitting surface 132e faces the second side surface 1213b (an inclined surface inclined relative to the radial direction).

[0072] When a positive driving force is applied to the rotating shaft 11 to rotate the rotating shaft 11 in the working rotation direction Dl, the rotating shaft 11 rotates the stop pin 13 in the direction Dl under the action of the positive driving force, the rotation matching surface 132e of the stop pin 13 is in contact with the second side surface 1213b, i.e. two inclined surfaces relative to the radial direction are in contact, and the radial component of the positive driving force on the two inclined surface contact portions overcomes the spring force of the stop driving member 14 (spring) to push the stop pin 13 into the accommodating groove 1121, so that the rotating shaft 11 can rotate in the direction Dl. The spring force of the stop driving member 14 (spring) is designed according to the inclination angle of the rotation matching surface 132e, the inclination angle of the second side surface 1213b, the length of the stop pin 13, the size of the positive driving force, etc., so that when the positive driving force is applied, the radial component is greater than the spring force.

[0073] When a reverse driving force is applied to the rotating shaft 11 to rotate the rotating shaft 11 in the direction opposite to the working rotation direction Dl, the rotating shaft 11 attempts to rotate the stop pin 13 in the direction opposite to the direction Dl under the action of the reverse driving force, the stop matching surface 132c of the stop pin 13 is in contact with the first side surface 1213a, i.e. two surfaces parallel to the radial direction are in contact, so that the reverse driving force on the two surface contact portions will not generate a radial component, and thus the stop pin 13 will not be pushed into the accommodating groove 1121, the stop matching surface 132c is in abutment with the first side surface 1213a, so that the rotating shaft 11 cannot rotate in the reverse direction.

[0074] The rotating member can be installed on the driving mechanism by the reverse rotation limiting mechanism 10 described above to form a one-way rotation device, under the driving of the driving mechanism, the rotating member can only rotate in a predetermined working rotation direction, and will not rotate in the reverse direction.

[0075] A one-way rotation device employing the reverse rotation limiting mechanism 10 described above will be exemplarily shown below.

[0076] Figure 12 is a perspective view of the one-way rotation device in this embodiment, Figure 13 is a sectional view of the one-way rotation device in this embodiment.

[0077] As shown in Figure 12 and Figure 13 , the one-way rotation device 100 comprises the reverse rotation limiting mechanism 10, a rotating member 20 and a driving mechanism 30.

[0078] The rotating member 20 comprises a cam 21 and a cam connecting member 22.

[0079] The cam 21 comprises a special-shaped cam disc 211 and two pushing columns 212 which are installed on the cam disc 211 and protrude outward from a surface of the cam disc 211. The cam connecting member 220 is a ring-shaped member, and the inner ring thereof has a shape matching with the end of the shaft column part 112 having the driving surface 1123, i.e. the inner ring has two flat surfaces respectively matching with the two driving surfaces 1123. The cam connecting member 220 is sleeved on the end of the shaft column part 112, and the cam connecting member 220 is fixedly connected with the cam disc 211, so that the shaft member 11 can drive the cam 21 to rotate.

[0080] The driving mechanism 30 comprises a motor 31 and a speed reducer 32.

[0081] The output shaft of the motor 31 is connected with the input end of the speed reducer 32. The speed reducer 32 is a three-stage gear speed reducer, and the limiting disc 12 is coaxially fixedly installed on the upper end surface of the speed reducer 32 by means of the limiting disc mounting hole 1221 and a plurality of fasteners. The limiting disc 12 also serves as the upper end cover of the speed reducer 32, and the shaft member 11 also serves as the output shaft of the speed reducer 32. The shaft member 11 is connected with the third-stage gear 323 by means of the shaft member mounting hole 1111 and the transmission shaft 321, so that the motor 310 can drive the shaft member 11 to rotate.

[0082] The above-mentioned one-way rotation device 100 is used in a nail gun which uses a steel spring as an energy storage component, and a piston is installed at one end of the steel spring, and a firing pin for firing a nail is installed on the piston. The two pushing columns 212 on the cam 210 sequentially push the piston to move towards the direction of the steel spring, so as to compress the steel spring to store energy. The reverse rotation limiting mechanism 10 can ensure that the cam 210 will not appear reverse rotation, so as to ensure the safety of the use of the nail gun.

[0083] On the other hand, in order to make the nail gun have the characteristics of being convenient to carry and convenient to hold and operate, the overall size and weight of the nail gun are strictly limited, and the overall size of the above-mentioned reverse rotation limiting mechanism 10 is very small, which is suitable for such devices with strict size limitation.

[0084] The above-mentioned one-way rotation device is only an example, and it can be understood that the reverse rotation limiting mechanism 10 can also be used in combination with other structures of rotating components and driving mechanisms.

[0085] Effects of the embodiment one

[0086] According to the reverse limiting mechanism provided by the embodiment, the reverse limiting mechanism comprises a rotating shaft, a limiting disc with a gear hole, a direction stopping pin and a direction stopping driving part. The rotating shaft is arranged in the gear hole of the limiting disc. The direction stopping pin is arranged in the accommodating groove and can move along the radial direction of the rotating shaft and the limiting disc. The direction stopping pin is matched with the plurality of limiting teeth of the gear hole to realize the one-way rotation of the component arranged on the rotating shaft. That is, the direction stopping pin is arranged in the inner ring of the limiting disc, and the direction stopping pin does not occupy the space outside the limiting disc. The direction stopping pin is arranged and moved by using the space inside the rotating shaft. The spacing between the limiting disc and the rotating shaft can be small. Therefore, compared with the traditional ratchet assembly, the overall size of the reverse limiting mechanism is greatly reduced, and the one-way rotation function can be realized. The reverse limiting mechanism can be applied to small devices which need to be portable and need to be operated by hand. In addition, the reverse limiting mechanism has the advantages of simple structure, small number of components, easy assembly and maintenance.

[0087] In the embodiment, the limiting teeth have a first side surface and a second side surface. The first side surface is parallel to the radial direction, and the second side surface is inclined relative to the radial direction. Therefore, when the rotating shaft is driven by a forward driving force, the second side surface and the rotating matching surface of the direction stopping pin are matched to generate a radial force in the accommodating groove, so that the direction stopping pin is pressed into the accommodating groove, and the rotating shaft can be rotated forward without being blocked. When the rotating shaft is driven by a reverse driving force, the first side surface and the direction stopping surface of the direction stopping pin are matched to generate substantially no radial force, thereby effectively preventing the rotating shaft from rotating in the reverse direction.

[0088] Further, the side surface of the direction stopping pin has two planes, and the shape of the accommodating groove is matched with the two planes. Therefore, the direction stopping pin can avoid rotating in the axial direction when the direction stopping pin moves, and the stability of the reverse limiting mechanism during operation is maintained.

[0089] Further, in the embodiment, the rotating shaft has a rotating shaft mounting disc part and a rotating shaft column part. Therefore, the rotating shaft can be connected to the speed reducer through the rotating shaft mounting disc part. The limiting disc comprises a main body cover part in the shape of a circular cover and a plurality of mounting block parts. The gear hole is arranged in the middle of the top surface of the main body cover part. Therefore, the limiting disc can also be used as the upper end cover of the speed reducer, so that the number of components of the one-way rotation device is smaller, and the assembly is more convenient.

[0090] <Embodiment Two>

[0091] The embodiment provides a reverse limiting mechanism and a corresponding one-way rotation device. In the embodiment, the same reference signs are given to the same constituent elements as those in Embodiment One, and the corresponding description is omitted.

[0092] Compared with Embodiment One, the difference lies in that the structure of the direction stopping pin 13 in the embodiment is different, and correspondingly, the structure of the accommodating groove 1121 on the rotating shaft 11 is also different.

[0093] In Embodiment 1, the cross-sectional shape of the stop pin 13 is axisymmetric, thus there is a possibility of it being installed backwards, causing the tilt direction of the outer end face 132e (rotation mating surface) to be opposite to the predetermined direction, and the reversing limiting mechanism 10 to malfunction. This embodiment aims to further solve the above-mentioned problems.

[0094] Figure 14 This is a perspective view of the stop pin in this embodiment. Figure 15 This is a frontal projection of the stop pin in this embodiment.

[0095] like Figure 14 and Figure 15 As shown, the axial cross-section of the stop pin 13 in this embodiment is a circle with a missing part. Therefore, the side of the stop pin 13 includes an incomplete cylindrical surface 13a and a plane 13b, which is parallel to the axial direction of the stop pin 13.

[0096] Accordingly, the cross-sectional shape of the receiving groove 1121 along its extension direction matches the cross-sectional shape of the stop pin 13, that is, it is also a circle with a missing part.

[0097] In this embodiment, the other structures are the same as in Embodiment 1, so they will not be described again.

[0098] Functions and effects of Example 2

[0099] Based on the functions and effects of the first embodiment, the reversing limiting mechanism and unidirectional rotation device provided in this embodiment, since the side of the stop pin includes an incomplete cylindrical surface and a plane, it no longer has axial symmetry. Therefore, it can not only prevent the stop pin from rotating axially during operation through the plane, but also provide a foolproof mechanism through the structure with only a single plane, which can avoid the problem of installing the stop pin backwards, thus making the assembly and maintenance of the reversing limiting mechanism more convenient.

[0100] <Example 3>

[0101] This embodiment provides a reversing limiting mechanism and a corresponding unidirectional rotation device. In this embodiment, the same symbols are assigned to the same constituent elements as in Embodiment 2, and the corresponding descriptions are omitted.

[0102] Compared with Embodiment 2, the difference lies in the structure of the stop pin 13 in this embodiment.

[0103] In Example 2, the material of the stop pin 13 is a wear-resistant metal or a modified polymer material that is wear-resistant and impact-resistant. However, wear-resistant metal materials, due to their high hardness, will generate relatively large noise during operation; although the aforementioned modified materials have certain wear resistance, their wear resistance is lower than that of metals, making them more susceptible to wear and requiring more frequent replacement of the stop pin 13. This example aims to further solve the above problems.

[0104] Figure 16 This is a perspective view of the stop pin in this embodiment.

[0105] like Figure 16 As shown, the stop pin 13 in this embodiment also includes a noise reduction layer 133. The noise reduction layer 133 is a thin sheet with a certain thickness, which is disposed on the outer end face 132e. The noise reduction layer 133 is made of the above-mentioned polymer wear-resistant and impact-resistant modified material, and is formed on the outer end face 132e by injection molding or encapsulation process. It can cover approximately the entire outer end face 132e, or cover most of the area in the middle of the outer end face 132e.

[0106] In this embodiment, the outer surface 133a of the noise reduction layer 133 is a rotation mating surface.

[0107] The main body 131 and mating part 132 of the stop pin 13 are made of wear-resistant metal material in one piece, that is, they are metal parts.

[0108] Figure 17 This is an orthographic projection of the reversing limiting mechanism in use in this embodiment.

[0109] like Figure 17 As shown, when a positive driving force is applied to the rotating shaft 11 along the D1 direction, the outer surface 133a (rotation mating surface) of the noise reduction layer 133 of the stop pin 13 contacts the second side surface 1213b (sloping surface), thereby reducing the noise during operation.

[0110] When a reverse driving force is applied to the rotating shaft 11 to rotate in the opposite direction to the D1 direction, the third arc surface 132c (stop mating surface) of the rotating shaft 11 contacts the first side surface 1213a (straight surface), that is, the metal part abuts against the limiting tooth 121.

[0111] In this embodiment, the other structures are the same as in Embodiment 2, so they will not be described again.

[0112] In addition, the noise reduction layer 133 of this embodiment can be added to the structure of the stop pin 13 in Embodiment 1.

[0113] Functions and effects of Example 3

[0114] According to the reverse limiting mechanism and the one-way rotation device provided in the embodiment, on the basis of the effects and advantages of the first embodiment, the modified material layer of the outer end portion can make the noise in the operation process smaller, and the main metal part can achieve good wear resistance, so that the stability of the reverse limiting mechanism in the long-term use process is better, and the frequency of disassembly, maintenance and replacement of components can be reduced, so that the user experience is better.

[0115] <Variant I>

[0116] The present variant provides a reverse limiting mechanism and a corresponding one-way rotation device. In the present variant, the same reference signs are assigned to the same constituent elements as in the first embodiment, and the corresponding description is omitted.

[0117] Compared with the first embodiment, the difference lies in that the structure of the gear hole 1211 of the limiting disc 12 in the reverse limiting mechanism 10 of the present variant is different.

[0118] Figure 18 is the front view of the limiting disc in the present variant.

[0119] As shown in Figure 18 , in the gear hole 1211 of the limiting disc 12 of the present variant, the first side surface 1213a and the second side surface 1213b are both inclined with respect to the radial direction of the limiting disc 12, and the inclination directions of the two are different. In the present variant, the inclination angle of the first side surface 1213a of the limiting groove 1213 is 5°-20°, and the inclination angle of the second side surface 1213b is 30°-45°, that is, the inclination angle of the first side surface 1213a is smaller than that of the second side surface 1213b, with the radial direction of the middle line of the bottom surface of the limiting groove 1213 as the reference.

[0120] The spring force of the direction-stopping driving part (spring) 14 is designed and adjusted according to the inclination angles of the first side surface 1213a and the second side surface 1213b, so that when the positive driving force in the D1 direction is applied to the rotating shaft part 11, the radial component of the positive driving force is sufficient to overcome the spring force; and when the reverse driving force in the D1 direction is applied to the rotating shaft part 11, the radial component of the reverse driving force is much smaller than the spring force, so that the same effects and advantages as in the first embodiment can be achieved.

[0121] In the present variant, the other structures are the same as in the first embodiment, and therefore the description is omitted.

[0122] In addition, in the present variant, the structure of the direction-stopping pin 13 of the second or third embodiment can also be used.

[0123] <Variant II>

[0124] The present modification provides a reverse rotation restricting mechanism and a corresponding one-way rotation device. In the present embodiment, the same reference numerals are given to the same constituent elements as in Embodiment 1, and the corresponding description is omitted.

[0125] The difference between the present modification and Embodiment 1 is that the structure of the gear hole 1211 of the restricting disk 12 in the reverse rotation restricting mechanism 10 of the present modification is different.

[0126] Figure 19 is a front view of the restricting disk in the present modification.

[0127] As shown in Figure 19 the gear hole 1211 of the restricting disk 12 in the present modification, the cross section of the limiting groove 1213 in the axial direction of the restricting disk 12 is substantially trapezoidal, and the bottom surface 1213c is substantially a plane parallel to the radial direction of the restricting disk 12. The first side surface 1213a and the second side surface 1213b are both inclined with respect to the radial direction of the restricting disk 12, and the inclination directions of the two are the same. In the present modification, with the radial direction passing through the intersection line of the bottom surface 1213c and the second side surface 1213b of one limiting groove 1213 as a reference, the inclination angle of the first side surface 1213a of the limiting groove 1213 is 5° to 20°, and the inclination angle of the second side surface 1213b is 30° to 45°, that is, the inclination angle of the first side surface 1213a is smaller than the inclination angle of the second side surface 1213b.

[0128] When a forward driving force is applied, the case is the same as in Embodiment 2, and the description is omitted.

[0129] When a reverse driving force is applied, the radial direction stop surface 132c is in contact with the second side surface 1213b, and according to the contact condition, no component force is generated or a component force in the radial direction outward is generated, so the stop pin 13 is not pushed into the accommodating groove 1121.

[0130] In the present modification, the other structures are the same as in Embodiment 1, and thus the description is omitted.

[0131] In addition, in the present modification, the structure of the stop pin 13 of Embodiment 2 or 3 can also be used.

[0132] <Modification 3>

[0133] The present modification provides a reverse rotation restricting mechanism and a corresponding one-way rotation device. In the present embodiment, the same reference numerals are given to the same constituent elements as in Embodiment 1, and the corresponding description is omitted.

[0134] The difference between the present modification and Embodiment 1 is that the structure of the gear hole 1211 of the restricting disk 12 in the reverse rotation restricting mechanism 10 of the present modification is different.

[0135] Figure 20is an orthographic view of the limit disk in this modification.

[0136] As shown in Figure 20 In the gear hole 1211 of the limit disk 12 of this modification, the limit groove 1213 is an isosceles trapezoidal groove, the first side surface 1213a and the second side surface 1213b are both parallel to the radial direction of the limit disk 12 and perpendicular to the circumferential direction of the gear hole 1211, i.e. both are straight surfaces.

[0137] When a positive driving force in the D1 direction is applied to the rotating shaft member 11, since the rotation matching surface 132e of the limit pin 13 is an inclined surface, the rotation matching surface 132e is in contact with the first side surface 1213a and still generates a component force in the radial direction towards the accommodating groove 1121. The spring of the limit driving member 14 is designed and adjusted according to the angle of the first side surface 1213a of this modification, the inclination angle of the rotation matching surface 132e, etc., so that the component force is greater than the spring force, thereby being able to push the limit pin 13 into the accommodating groove 1121.

[0138] When a reverse driving force in the opposite direction of the D1 direction is applied to the rotating shaft member 11, the case is the same as in Embodiment One and will not be described again.

[0139] In this modification, other structures are the same as in Embodiment One, so the description will not be repeated.

[0140] In addition, in this modification, the structure of the limit pin 13 of Embodiments Two or Three can also be adopted.

[0141] <Modification Four>

[0142] This modification provides a reverse limiting mechanism and a corresponding one-way rotating device. In this embodiment, the same symbols are assigned to the same constituent elements as in Embodiment One and the corresponding description is omitted.

[0143] Compared with Embodiment One, the difference lies in that in the reverse limiting mechanism 10 of this modification, the structure of the limit driving member 14 is different.

[0144] Figure 21 is a perspective view of the limit driving member in this modification.

[0145] As shown in Figure 21As shown, in the present modification, the stopper driving member 14 is a bent metal sheet belt having one or more bent portions 141. In the present embodiment, the stopper driving member 14 has one bent portion 141 and is in the shape of a V. The stopper driving member 14 is also arranged in the accommodating groove 1121 and abuts against the groove bottom of the accommodating groove 1121 at one end and abuts against the one end of the stopper pin 13 arranged in the accommodating groove 1121 at the other end. The groove bottom of the accommodating groove 1121 and the end face of the one end of the stopper pin 13 can also be modified according to the structure of the stopper driving member 14 so that the stopper driving member 14 is more stably arranged therein.

[0146] When the stopper pin 13 is subjected to a force in the radial direction toward the accommodating groove 1121, the stopper driving member 14 is deformed (i.e., the angle of the V is reduced) so that the stopper pin 13 moves toward the accommodating groove 1121. When the stopper pin 13 is no longer subjected to the force, the stopper driving member 14 is deformed to return to its original shape and provides a force to push the stopper pin 13 out.

[0147] In the present modification, the other structures are the same as those in Embodiment 1 and thus will not be described again.

[0148] In addition, in the present modification, the structure of the stopper pin 13 in Embodiments 2 or 3 can also be used, or the structure of the limiting disc 12 in any one of Modifications 1 to 3 can also be used.

[0149] <Modification 5>

[0150] The present modification provides a reverse rotation limiting mechanism and a corresponding one-way rotation device. In the present modification, the same reference numerals are given to the same constituent elements as those in Embodiment 1 and the corresponding descriptions will be omitted.

[0151] Compared with Embodiment 1, the difference lies in that the structure of the stopper driving member in the reverse rotation limiting mechanism 10 in the present modification is different.

[0152] In the present modification, the stopper driving member is an elastic body in the shape of a square column or a circular column and can be a rubber or rubber-plastic part. The stopper driving member is also arranged in the accommodating groove 1121 and abuts against the groove bottom of the accommodating groove 1121 at one end and abuts against the one end of the stopper pin 13 arranged in the accommodating groove 1121 at the other end. When the stopper pin 13 is subjected to a force in the radial direction toward the accommodating groove 1121, the stopper driving member is deformed to press so that the stopper pin 13 moves toward the accommodating groove 1121. When the stopper pin 13 is no longer subjected to the force, the stopper driving member is deformed to return to its original shape and provides a force to push the stopper pin 13 out.

[0153] In an alternative, the stopper driving member can also have a cross-sectional shape matching the cross-sectional shape of the accommodating groove 1121.

[0154] In the present modification, the other structures are the same as those in Embodiment 1 and thus will not be described again.

[0155] In addition, the stopper pin 13 of Embodiment 2 or 3 can be used, or the limiting disc 12 of any one of the first to third modified examples can be used.

[0156] The above embodiments and modified examples are only used to illustrate the specific embodiments of the present application, and the present application is not limited to the description range of the above embodiments and modified examples. It should be understood by those skilled in the art that the present application is not limited to the above embodiments and modified examples, and the above embodiments and modified examples described in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

[0157] In the above embodiments, the stopper pin is generally in a cylindrical shape with one or two side planes. In alternative solutions, the stopper pin can also be in a square column shape or a special-shaped column shape, such as a cylindrical shape with a boss. The accommodating groove has a recess corresponding to the boss. The structure design of the stopper pin and the accommodating groove only needs to enable the stopper pin to move radially in the accommodating groove and not to rotate axially.

[0158] In the above embodiments, the one-way rotation device is used in a nail gun, the driving mechanism is a motor and a speed reducer, and the rotating part is a cam. In alternative solutions, the one-way rotation device can also be used in other devices, the driving mechanism can also be other structures, as long as it can drive the rotating shaft to rotate; and the rotating part can also be other structures, as long as it can be installed on the rotating shaft.

Claims

1. A reversing limiting mechanism for causing a component mounted on the reversing limiting mechanism to rotate in one direction, characterized in that, include: A rotating shaft for driving the component to rotate, having a receiving groove extending radially thereon; A limiting disc has a gear hole with multiple limiting teeth, and the rotating shaft passes through the gear hole with the receiving groove facing the limiting teeth. The anti-rotation pin is movably embedded in the receiving groove along the radial direction, and one end of it is a mating part located outside the receiving groove, which is used to cooperate with the limiting tooth to realize the unidirectional rotation of the rotating shaft. as well as A stop drive member is used to drive the stop pin to move out of the receiving groove. The mating part has: The rotating mating surface, inclined relative to the radial direction, is used to abut against the limiting tooth when the rotating shaft is subjected to a positive driving force, pressing the stop pin toward the receiving groove, thereby allowing the rotating shaft to rotate in the forward direction; and The stop mating surface, parallel to the radial direction, is used to abut against the limiting tooth when the rotating shaft is subjected to a reverse driving force, so as to prevent the rotating shaft from rotating in the opposite direction.

2. The reversing limiting mechanism according to claim 1, characterized in that: in, A limiting groove is formed between two adjacent limiting teeth. The limiting groove has a first side and a second side. Both the first side and the second side are perpendicular to the circumferential direction of the gear hole. The first side surface is used to abut against the stop-fit ​​surface when the rotating shaft is subjected to the reverse driving force, so as to prevent the reverse rotation. The second side is used to abut against the rotating mating surface when the rotating shaft is subjected to the positive driving force, so that the anti-pin is subjected to a component of the positive driving force in the radial direction toward the receiving groove, thereby pressing the anti-pin toward the receiving groove.

3. The reversing limiting mechanism according to claim 2, characterized in that: in, The first side is parallel to the radial direction. The second side is tilted at an angle of 30° to 45° relative to the corresponding first side. The tilt angle of the rotating mating surface relative to the radial direction is 30° to 80°.

4. The reversing limiting mechanism according to claim 2, characterized in that: in, Both the first side and the second side are inclined relative to the radial direction. Relative to the first radial direction of the pivot member passing through the junction of the first and second sides, the first and second sides are inclined to both sides respectively. The first side has an inclination angle of 5° to 20° relative to the first radial direction. The second side has an inclination angle of 30° to 45° relative to the first radial direction. The tilt angle of the rotating mating surface relative to the radial direction is 30° to 80°.

5. The reversing limiting mechanism according to claim 2, characterized in that: in, Both the first side and the second side are inclined relative to the radial direction. Relative to the first radial direction of the pivot member passing through the junction of the first and second sides, the first and second sides are inclined to the same side. The first side has an inclination angle of 5° to 20° relative to the first radial direction. The second side has an inclination angle of 30° to 45° relative to the first radial direction. The tilt angle of the rotating mating surface relative to the radial direction is 30° to 80°.

6. The reversing limiting mechanism according to claim 2, characterized in that: in, Both the first side and the second side are parallel to the radial direction. The tilt angle of the rotating mating surface relative to the radial direction is 30° to 80°.

7. The reversing limiting mechanism according to claim 1, characterized in that: in, The stop pin is cylindrical, with a cylindrical surface and a flat surface on its side. The cylindrical surface is the stop mating surface. The cross-sectional shape of the receiving groove matches the stop pin.

8. The reversing restraint mechanism according to claim 1, Its features are: The anti-steering pin includes: A metal part, made of wear-resistant metal material, is cylindrical, with one end having a plane inclined relative to its axial direction, and one side of the metal part is the stop-fit ​​surface; and The noise reduction layer, made of a wear-resistant and impact-resistant modified material, is disposed on the plane of the metal part, and the outer surface of the noise reduction layer is the rotation mating surface.

9. The reversing limiting mechanism according to claim 1, characterized in that: in, The stop drive component is an elastic element, disposed in the receiving groove, with one end abutting against the bottom of the receiving groove and the other end abutting against the stop pin. The elastic element is any one of the following: a spring, a metal strip with one or more bends, a columnar rubber part, or a columnar rubber-plastic part.

10. A unidirectional rotating device, characterized in that, include: The reversing limiting mechanism has a rotating shaft. as well as A rotating component is mounted on the rotating shaft of the reversing limiting mechanism, the reversing limiting mechanism enabling the rotating component to rotate in one direction. The reversing limiting mechanism is the reversing limiting mechanism according to any one of claims 1-9.

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