Reverse input prevention clutch device

Abstract

The present invention is characterized by comprising: an input connection unit into which power provided from a driving unit is input; an output connection unit into which power supplied from the driving unit is output; a power transmission unit comprising a plurality of transmission members that transmits power by connecting the input connection unit and the output connection unit; and a gap adjustment unit that blocks power by widening the gap between the plurality of transmission members to provide frictional force when power is provided in the reverse direction through the output connection unit.

Description

Technology Field

[0001] The present invention relates to a reverse input prevention clutch device that can transmit forward power and block reverse power, and can be applied to a vehicle steering system. Background Technology

[0002] In the case of a rear-wheel steering system (RWS) capable of steering the rear wheels along with the front wheels, the turning radius is reduced by controlling the rear steering angle in an inverse phase opposite to the front steering angle at low speeds, and driving stability is improved by controlling the rear steering angle in the same phase as the front steering angle at high speeds.

[0003] Since a rear-wheel steering system experiences difficulties in straight-line driving due to rear-wheel instability caused by reverse input from the rear wheels, it must be able to prevent back driving to ensure rear-wheel driving stability as well as provide a fail-safe in the event of a system failure.

[0004] To this end, conventional rear-wheel steering systems utilize a lead screw type gear mechanism capable of self-locking.

[0005] The background technology of the present invention is disclosed in Korean Published Patent Application No. 10-2022-0164341 (published Dec. 13, 2022, Title of Invention: Anti-Reverse Clutch). The problem to be solved

[0006] The purpose of the present invention is to provide a reverse input prevention clutch device comprising a transmission part composed of a plurality of transmission members that transmits power, and a gap adjustment part that adjusts the gap between the transmission members, wherein the gap adjustment part is driven according to the direction of the power provided to the clutch, causing the gap between the plurality of transmission members to widen and generate frictional force, thereby blocking power input in the reverse direction and preventing a decrease in power transmission efficiency when power is input in the forward direction. means of solving the problem

[0007] The present invention is characterized by comprising: an input connection unit into which power provided from a driving unit is input; an output connection unit into which power supplied from the driving unit is output; a power transmission unit comprising a plurality of transmission members that transmits power by connecting the input connection unit and the output connection unit; and a gap adjustment unit that blocks power by widening the gap between the plurality of transmission members to provide frictional force when power is provided in the reverse direction through the output connection unit.

[0008] The above input connection unit may include a shaft connection unit to which the drive shaft of the above drive unit is connected; and an interlocking connection unit that simultaneously restrains a plurality of the transmission members to transmit power to a plurality of the transmission members forming the above power transmission unit.

[0009] The above-mentioned interlocking member may include a plurality of first connecting protrusions extending from the input connecting member and arranged to surround the transmission member; and a plurality of second connecting protrusions extending from the input connecting member and arranged to surround the transmission member, maintaining a distance from the first connecting protrusions.

[0010] The power transmission unit may include: a first transmission member disposed inside the first connecting projection and the second connecting projection and rotated together with the input connecting unit, and installed to protrude through the gap between a plurality of the first connecting projections and the second connecting projections; and a second transmission member disposed inside the first connecting projection and the second connecting projection and rotated together with the input connecting unit, installed to protrude through the gap between a plurality of the first connecting projections and the second connecting projections, and disposed while maintaining a gap with the first transmission member.

[0011] The first transmission member may include a first friction surface that provides braking force by friction with a case in which the input connection part is rotatably installed; a first restraining surface in which the first connecting projection is seated to restrain the first transmission member; and a first restraining groove in which the second connecting projection is inserted to restrain the first transmission member.

[0012] The second transmission member may include: a second friction surface that provides braking force by friction with a case in which the input connection part is rotatably installed; a second restraining surface in which the first connecting projection is seated to restrain the second transmission member; and a second restraining groove in which the second connecting projection is inserted to restrain the second transmission member.

[0013] The output connection part may include a connection body that is rotatably connected to the input connection part by a bearing so that the output shaft is connected.

[0014] The above spacing adjustment member may include a spacing member protruding from the connecting body; and a spacing groove formed in the transmission member so that the spacing member can be movably inserted.

[0015] The above-mentioned spacing member may have a curved surface portion that presses the spacing groove portion outward as the spacing member rotates when the connecting body is rotated by power provided along the output shaft.

[0016] The power transmission unit may include: a first transmission member disposed inside the first connecting projection and the second connecting projection, which rotates together with the input connecting unit and is installed to protrude through the gap between a plurality of the first connecting projections and the second connecting projections; and a second transmission member disposed inside the first connecting projection and the second connecting projection, which rotates together with the input connecting unit and is installed to protrude through the gap between a plurality of the first connecting projections and the second connecting projections, and which overlaps slidably with the first transmission member. Effects of the invention

[0017] The reverse input prevention clutch device according to the present invention is equipped with a power transmission unit in which the gap between a plurality of transmission members is adjusted, and a gap adjustment unit that generates frictional force while adjusting the gap between the transmission members according to the direction of power input to the clutch. Therefore, when transmitting forward power, frictional force by the transmission members is eliminated to prevent a decrease in power transmission efficiency, and when reverse power is braking, frictional force by the transmission members is provided to prevent reverse power from being transmitted to the drive unit.

[0018] The gap adjustment portion of the reverse input prevention type clutch device according to the present invention is composed of a first member and a second member protruding from the output connection portion, and since the first member and the second member are inserted into the first separation groove portion and the second separation groove portion formed in the first transmission member and the second transmission member, when reverse power is provided to the output connection portion, the first member and the second member rotate and separate from the first separation groove portion and the second separation groove portion, thereby generating a pressing force that presses the first separation groove portion and the second separation groove portion outwardly, and generating a frictional force between the first transmission member and the second transmission member and the case, thereby having the advantage of being able to block reverse power.

[0019] The reverse input prevention type clutch device according to the present invention has the advantage of being able to provide a slim clutch device without a separate technical configuration stacked on the first transmission member and the second transmission member, since the first transmission member and the second transmission member are arranged to maintain a gap so as to spread apart or come closer by the operation of the gap adjustment part.

[0020] The reverse input prevention type clutch device according to the present invention is formed such that a portion of a first transmission member and a second transmission member are slidably stacked so that the gap between a separation surface and a protruding surface widens or narrows by the operation of a gap adjustment part, and thus, when the first transmission member and the second transmission member frictionally rub against a case to perform a braking operation, the first transmission member and the second transmission member are supported by each other by the overlapping portion, thereby having the advantage of doubling the frictional force. Brief explanation of the drawing

[0021] FIG. 1 is a perspective view of a rear-wheel steering system equipped with a reverse input prevention clutch device according to one embodiment of the present invention. FIG. 2 is an exploded view of a rear-wheel steering system equipped with a reverse input prevention clutch device according to one embodiment of the present invention. FIG. 3 is an exploded rear perspective view of a rear wheel steering system equipped with a reverse input prevention clutch device according to one embodiment of the present invention. FIG. 4 is a cross-sectional view illustrating a reverse input prevention type clutch device according to one embodiment of the present invention. FIG. 5 is a perspective view showing a reverse input prevention type clutch device according to one embodiment of the present invention. FIG. 6 is a rear perspective view showing a reverse input prevention type clutch device according to one embodiment of the present invention. FIG. 7 is an exploded perspective view showing a reverse input prevention type clutch device according to one embodiment of the present invention. FIG. 8 is a cross-sectional view illustrating a reverse input prevention type clutch device according to one embodiment of the present invention. FIG. 9 is a side cross-sectional view showing a reverse input prevention type clutch device according to one embodiment of the present invention. FIG. 10 is an operating state diagram showing a reverse input prevention type clutch device according to one embodiment of the present invention. FIG. 11 is a perspective view showing a reverse input prevention clutch device according to another embodiment of the present invention. FIG. 12 is an exploded perspective view showing a reverse input prevention type clutch device according to another embodiment of the present invention. FIG. 13 is a cross-sectional view showing a reverse input prevention type clutch device according to another embodiment of the present invention. FIG. 14 is a side cross-sectional view showing a reverse input prevention clutch device according to another embodiment of the present invention. FIG. 15 is an operating state diagram showing a reverse input prevention clutch device according to another embodiment of the present invention. Specific details for implementing the invention

[0022] Hereinafter, an embodiment of a reverse input prevention clutch device according to the present invention will be described with reference to the attached drawings.

[0023] In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for the sake of clarity and convenience of explanation.

[0024] In addition, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intention or practice of the user or operator.

[0025] Therefore, the definitions of these terms should be based on the content throughout this specification.

[0026] FIG. 1 is a perspective view of a rear wheel steering system equipped with a reverse input prevention clutch device according to one embodiment of the present invention, FIG. 2 is an exploded perspective view of a rear wheel steering system equipped with a reverse input prevention clutch device according to one embodiment of the present invention, and FIG. 3 is a rear exploded perspective view of a rear wheel steering system equipped with a reverse input prevention clutch device according to one embodiment of the present invention.

[0027] FIG. 4 is a cross-sectional view showing a reverse input prevention type clutch device according to one embodiment of the present invention, FIG. 5 is a perspective view showing a reverse input prevention type clutch device according to one embodiment of the present invention, and FIG. 6 is a rear perspective view showing a reverse input prevention type clutch device according to one embodiment of the present invention.

[0028] FIG. 7 is an exploded perspective view showing a reverse input prevention type clutch device according to one embodiment of the present invention, FIG. 8 is a cross-sectional view showing a reverse input prevention type clutch device according to one embodiment of the present invention, FIG. 9 is a side cross-sectional view showing a reverse input prevention type clutch device according to one embodiment of the present invention, and FIG. 10 is an operating state diagram showing a reverse input prevention type clutch device according to one embodiment of the present invention.

[0029] Referring to FIGS. 1 to 10, a reverse input prevention clutch device (100) according to one embodiment of the present invention includes an input connection part (10) into which power provided from a driving part (82) is input, an output connection part (50) into which power supplied from the driving part (82) is output, a power transmission part (30) comprising a plurality of transmission members that transmit power by connecting the input connection part (10) and the output connection part (50), and a gap adjustment part (70) that blocks power by widening the gap between the plurality of transmission members to provide frictional force when power is provided in the reverse direction through the output connection part (50).

[0030] Therefore, when power provided from the drive unit (82) is transmitted to the input connection unit (10), the power transmission unit (30) connected to the input connection unit (10) rotates, thereby rotating the output connection unit (50), so that the output shaft (56) installed in the output connection unit (50) rotates and transmits power.

[0031] The clutch device of the present embodiment can be installed in a rear-wheel steering device, and steering operation can be performed by moving the steering shaft (80) to one side or the other side while adjusting the forward power provided from the drive unit (82) in a clockwise or counterclockwise direction.

[0032] When the drive wheel connected to the steering shaft (80) is rotated by an external force while the steering operation described above is being performed or while the steering operation is stopped, the steering shaft (80) moves to one side or the other, and reverse power through the output shaft (56) can be input to the power transmission unit (30). In this embodiment, since a gap adjustment unit (70) that blocks reverse power is provided, when reverse power is input through the output shaft (56), frictional force is provided by the operation of the gap adjustment unit (70), thereby blocking the reverse power.

[0033] The input connection part (10) of the present embodiment includes a shaft connection part (14) to which the drive shaft of the drive part (82) is connected, and an interlocking connection part (17) that simultaneously restrains a plurality of transmission members to transmit power to a plurality of transmission members forming a power transmission part (30).

[0034] The input connection part (10) is formed in the shape of a square panel with concave cut corners, and the top, bottom, and both ends are formed with protruding shapes, so it is made of a panel that forms a front shape similar to a cross.

[0035] An axle connection part (14) is provided on the upper surface of the input connection part (10) to which the drive shaft of the drive part (82) is connected, and the axle connection part (14) of the present embodiment includes a protrusion body (15) protruding from the center of the upper surface of the input connection part (10) and a plurality of auxiliary protrusions (16) arranged at a distance from the protrusion body (15).

[0036] Therefore, when the main body (15) of the protrusion is inserted into the end of the drive shaft, a plurality of auxiliary protrusions (16) can be firmly connected by adhering to the outer wall of the drive shaft.

[0037] The interlocking connection part (17) of the present embodiment includes a plurality of first connecting protrusions (18) that extend from the input connection part (10) and are arranged to surround a transmission member, and a plurality of second connecting protrusions (19) that extend from the input connection part (10) and are arranged to surround a transmission member and maintain a distance from the first connecting protrusions (18).

[0038] The first connecting projection (18) protrudes laterally from the upper, lower, and both ends of the input connection part (10) and is bent toward the power transmission part (30) to surround the power transmission part (30), so that when power is transmitted from the drive shaft connected to the center of the upper surface of the input connection part (10), the input connection part (10) and the power transmission part (30) can rotate simultaneously.

[0039] In addition, the second connecting projection (19) of the present embodiment extends laterally from both ends of the input connection part (10) to maintain a predetermined distance from a pair of first connecting projections (18) protruding from both ends of the input connection part (10), and is bent toward the power transmission part (30) to form a shape that wraps around the power transmission part (30).

[0040] The power transmission unit (30) of the present embodiment includes a first transmission member (31) which is positioned inside the first connecting projection (18) and the second connecting projection (19) and rotates together with the input connection unit (10), and is installed to protrude at a distance between a plurality of first connecting projections (18) and the second connecting projection (19); and a second transmission member (35) which is positioned inside the first connecting projection (18) and the second connecting projection (19), rotates together with the input connection unit (10), is installed to protrude at a distance between a plurality of first connecting projections (18) and the second connecting projection (19), and is positioned while maintaining a distance from the first transmission member (31).

[0041] The first transmission member (31) and the second transmission member (35) are formed in a 'U' shape and arranged so that their ends face each other, so the planar shape in which the first transmission member (31) and the second transmission member (35) are installed forms a shape similar to a rectangle.

[0042] Accordingly, when the first transmission member (31) and the second transmission member are placed on the input connection part (10), the edges of the first transmission member (31) and the second transmission member (35) are formed to protrude toward the cut edge side of the input connection part (10).

[0043] The first transmission member (31) of the present embodiment includes a first friction surface (32) that provides braking force by friction with a case (84) in which an input connection part (10) is rotatably installed, a first restraining surface (33) in which a first connecting projection (18) is seated to restrain the first transmission member (31), and a first restraining groove (34) in which a second connecting projection (19) is inserted to restrain the first transmission member (31).

[0044] Additionally, the second transmission member (35) of the present embodiment includes a second friction surface (36) that provides braking force by friction with a case (84) on which the input connection part (10) is rotatably installed, a second restraining surface (37) on which the first connecting projection (18) is seated to restrain the second transmission member (35), and a second restraining groove (38) into which the second connecting projection (19) is inserted to restrain the second transmission member (35).

[0045] Accordingly, the first friction surface (32) and the second friction surface (36) are positioned facing the inner wall of the case (84) in which the power transmission unit (30) is housed, with the gap between the first connecting projection (18) and the second connecting projection (19), and the first friction surface (32) and the second friction surface (36) are positioned to maintain a gap with the inner wall of the case (84) while forward power is transmitted, the first connecting projection (18) is seated on the first restraining surface (33) and the second restraining surface (37), and the second connecting projection (19) is inserted into the first restraining groove (34) and the second restraining groove (38) to simultaneously rotate and connect the input connecting unit (10) and the power transmission unit (30).

[0046] When reverse power is input through the output shaft (56), the first friction part and the second friction part protrude by the operation of the gap adjustment part (70) and frictionally rub against the inner wall of the case (84), thereby blocking the reverse power.

[0047] The output connection part (50) of the present embodiment includes a connection body (52) that is rotatably connected to the input connection part (10) by a bearing (58) so that the output shaft (56) is connected. Thus, the bearing (58) is pressed into a hole formed in the center of the connection body (52), and the center of the bearing (58) is installed on a connection shaft (12) protruding from the center of the bottom surface of the input connection part (10), so that the output shaft (56) can be rotatably connected to the input connection part (10).

[0048] The spacing adjustment part (70) of the present embodiment includes a spacing member (71) protruding from the connecting body (52) and a spacing groove formed in the transmission member so that the spacing member (71) can be inserted movably.

[0049] The spacing member (71) includes a first member (72) protruding from one side of the connecting body (52) and a second member (73) protruding from the other side of the connecting body (52), and the spacing groove includes a first spacing groove (79a) formed in the first transmission member (31) to insert the first member (72) and a second spacing groove (79b) formed in the second transmission member (35) to insert the second member (73).

[0050] In this embodiment, the first member (72) and the second member (73) are formed with a narrow width compared to the internal space of the first separation groove (79a) and the second separation groove (79b). Therefore, when the output shaft (56) and the connecting body (52) are rotated and the first member (72) and the second member (73) are separated to one side or the other inside the first separation groove (79a) and the second separation groove (79b), pressing the first separation groove (79a) and the second separation groove (79b) outwardly provides a pressing force.

[0051] In addition, the spacing member (71) of the present embodiment is provided with a curved surface (74) that presses the spacing groove portion outward as the spacing member (71) rotates when the connecting body (52) is rotated by power provided along the output shaft (56). Therefore, when the output shaft (56) and the connecting body (52) are rotated by reverse power, the first member (72) and the second member (73) rotate to one side or the other side and press the inner walls of the first spacing groove portion (79a) and the second spacing groove portion (79b). At this time, the inner walls of the first spacing groove portion (79a) and the second spacing groove portion (79b) slide along the curved surface (74) and move outward.

[0052] As described above, when the first separation groove (79a) and the second separation groove (79b) are pressed outward, the first transmission member (31) and the second transmission member (35) spread outward toward the input connection part (10), and the first friction surface (32) and the second friction surface (36) rub against the inner wall of the case (84), thereby restricting the rotational movement of the power transmission part (30) and blocking the input of reverse power.

[0053] When the reverse power input through the output shaft (56) is cut off, the first transmission member (31) and the second transmission member (35), which were deformed by the second connecting projection (19) inserted into the first restraint groove (34) and the second restraint groove (38), return to their original positions, and the first friction surface (32) and the second friction surface (36) are separated from the inner wall of the case (84), thereby enabling the transmission of forward power.

[0054] FIG. 11 is a perspective view showing a reverse input prevention type clutch device according to another embodiment of the present invention, FIG. 12 is an exploded perspective view showing a reverse input prevention type clutch device according to another embodiment of the present invention, and FIG. 13 is a cross-sectional view showing a reverse input prevention type clutch device according to another embodiment of the present invention.

[0055] FIG. 14 is a side cross-sectional view showing a reverse input prevention type clutch device according to another embodiment of the present invention, and FIG. 15 is an operating state diagram showing a reverse input prevention type clutch device according to another embodiment of the present invention.

[0056] Referring to FIGS. 11 to 15, the power transmission unit (30) of a reverse input prevention type clutch device according to another embodiment of the present invention includes a first transmission member (31) which is positioned inside the first connecting projection (18) and the second connecting projection (19) and rotates together with the input connection unit (10), and is installed to protrude through the gap between the plurality of first connecting projections (18) and the second connecting projection (19); and a second transmission member (35) which is positioned inside the first connecting projection (18) and the second connecting projection (19), rotates together with the input connection unit (10), is installed to protrude through the gap between the plurality of first connecting projections (18) and the second connecting projection (19), and is slidably overlapped with the first transmission member (31).

[0057] In this embodiment, the first transmission member (31) and the second transmission member (35) have a square-shaped hole formed in the center so that the planar shape is similar to a square band, and a first separation surface (75) that is pressed by the first member (72) is formed on the upper bottom surface of the first transmission member (31), a second protruding surface (78) is formed on the lower upper surface of the second transmission member, a first protruding surface (76) is formed on the upper bottom surface of the second transmission member (35), and a second separation surface (77) is formed on the lower upper surface of the second transmission member (35).

[0058] As shown in FIG. 13, the first transmission member (31) and the second transmission member (35) are installed with a portion overlapping, so the first spacing surface (75) of the first transmission member (31) and the first protruding surface (76) of the second transmission member (35) are arranged facing each other while maintaining a gap, and the second spacing surface (77) of the second transmission member (35) and the second protruding surface (78) of the second transmission member (35) are arranged facing each other while maintaining a gap.

[0059] The spacing adjustment part (70) of the present embodiment includes a spacing member (71) interposed between the spacing surface and the protruding surface, which, when the connecting body (52) is rotated, widens the gap between the spacing surface and the protruding surface and causes the first transmission member (31) and the second transmission member (35) to protrude outward from the input connection part (10).

[0060] In the connecting body (52) of the present embodiment, a pair of rotating protrusions (54) protrude and a bearing (58) is pressed into it, and a connecting shaft (12) is installed in the center of the bearing (58) to rotatably connect an output shaft (56) installed in the connecting body (52) to an input connecting part (10).

[0061] Additionally, the spacing member (71) of the present embodiment includes a first member (72) interposed between a first spacing surface (75) and a first protruding surface (76), a second member (73) interposed between a second spacing surface (77) and a second protruding surface (78), and a curved portion (74) formed on the outer end of the first member (72) and the second member (73).

[0062] Accordingly, when reverse power is input from the output shaft (56), the first member (72) and the second member (73) rotate together with the connecting body (52), and the first protruding surface (76) and the second protruding surface (78) are pressed by the curved portion (74), causing the first transmission member (31) and the second transmission member (35) to protrude outward from the input connection portion (10), thereby causing the first friction surface (32) and the second friction surface (36) to rub against the inner wall of the case (84) and blocking the reverse power.

[0063] In addition, a first restraining projection (33a) is formed at the end of the first restraining surface (33) provided on both sides of the first transmission member (31) of the present embodiment, so that the first connecting projection (18) is engaged and the first connecting projection (18) and the first transmission member (31) are rotated simultaneously.

[0064] At the end of the second restraining surface (37) provided on both sides of the second transmission member (35) of the present embodiment, a second restraining projection (37a) is formed so that the first connecting projection (18) is engaged and the first connecting projection (18) and the second transmission member (35) are rotated simultaneously.

[0065] In addition, reference numerals shown in FIGS. 11 to 15 but not described are identical to the descriptions of reference numerals shown in FIGS. 1 to 10, so their descriptions have been omitted.

[0066] Thus, a reverse input prevention type clutch device is provided, which can prevent a decrease in power transmission efficiency when forward power is input, by providing a gap adjustment unit that adjusts the gap between the transmission members in a transmission unit composed of multiple transmission members that transmits power, so that the gap adjustment unit is driven according to the direction of the power provided to the clutch, causing the gap between the multiple transmission members to widen and generate frictional force.

[0067] Although the present invention has been described with reference to an embodiment illustrated in the drawings, this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom.

[0068] In addition, although a reverse input prevention type clutch device has been described as an example, this is merely illustrative, and the clutch device of the present invention may be used in other products other than the reverse input prevention type clutch device.

[0069] Therefore, the true technical scope of protection of the present invention should be determined by the following patent claims. Explanation of the symbols

[0070] 10 : Input connection section 12 : Connecting axis 14: Shaft connection part 15 : Protrusion body 16 : auxiliary projection 17 : Interlocking connection part 18 : First connecting projection 19 : Second connecting projection 30 : Power transmission unit 31 : First transmission member 32: First friction surface 33: First restraint surface 33a : First restraint projection 34 : First Restraint Home 35 : Second transmission member 36 : Second friction surface 37 : Second restraint surface 37a : Second restraint projection 38 : 2nd Restraint Home 50 : Output connection 52 : Connecting body 54 : Rotating protrusion 56 : Output axis 58 : Bearing 70 : Spacing adjustment part 71 : Separator 72 : First part 73 : Second absence 74 : Curved part 75 : First separation surface 76 : First protrusion 77 : Second separation surface 78 : Second protruding surface 79a : First separation groove 79b : Second separation groove 80 : Steering shaft 82 : Drive unit 84 : Case 100 : Clutch device

Claims

Claim 1 A reverse input prevention clutch device characterized by comprising: an input connection unit into which power provided from a driving unit is input; an output connection unit into which power supplied from the driving unit is output; a power transmission unit comprising a plurality of transmission members that transmit power by connecting the input connection unit and the output connection unit; and a gap adjustment unit that blocks power by widening the gap between the plurality of transmission members to provide frictional force when power is provided in the reverse direction through the output connection unit. Claim 2 A reverse input prevention type clutch device according to claim 1, wherein the input connection part comprises: a shaft connection part to which the drive shaft of the drive part is connected; and an interlocking connection part that simultaneously restrains the plurality of transmission members to transmit power to the plurality of transmission members forming the power transmission part. Claim 3 A reverse input prevention type clutch device according to claim 2, wherein the interlocking connection part comprises: a plurality of first connecting protrusions extending from the input connection part and arranged to surround the transmission member; and a plurality of second connecting protrusions extending from the input connection part and arranged to surround the transmission member, maintaining a distance from the first connecting protrusions. Claim 4 In paragraph 3, the power transmission unit comprises: a first transmission member disposed inside the first connecting projection and the second connecting projection and rotates together with the input connecting unit, and installed to protrude through the gap between a plurality of the first connecting projections and the second connecting projections; and a second transmission member disposed inside the first connecting projection and the second connecting projection and rotates together with the input connecting unit, installed to protrude through the gap between a plurality of the first connecting projections and the second connecting projections, and disposed while maintaining a gap with the first transmission member. Claim 5 A reverse input prevention type clutch device according to claim 4, wherein the first transmission member comprises: a first friction surface that provides braking force by friction with a case in which the input connection part is rotatably installed; a first restraining surface in which the first connecting projection is seated to restrain the first transmission member; and a first restraining groove portion into which the second connecting projection is inserted to restrain the first transmission member. Claim 6 In claim 4, the second transmission member comprises: a second friction surface that provides braking force by friction with a case in which the input connection part is rotatably installed; a second restraining surface in which the first connecting projection is seated to restrain the second transmission member; and a second restraining groove in which the second connecting projection is inserted to restrain the second transmission member, characterized in that it is a reverse input prevention type clutch device. Claim 7 A reverse input prevention clutch device characterized in that, in paragraph 4, the output connection part comprises a connecting body rotatably connected to the input connection part by a bearing so as to connect an output shaft. Claim 8 A reverse input prevention type clutch device according to claim 7, wherein the gap adjustment member comprises: a spacing member protruding from the connecting body; and a spacing groove formed in the transmission member so that the spacing member can be movably inserted. Claim 9 A reverse input prevention type clutch device according to claim 8, wherein the above-mentioned spacing member has a curved surface portion that presses the spacing groove portion outward as the spacing member rotates when the connecting body is rotated by power provided along the output shaft. Claim 10 In paragraph 3, the power transmission unit comprises: a first transmission member disposed inside the first connecting projection and the second connecting projection, rotates together with the input connecting unit, and is installed to protrude through the gap between a plurality of the first connecting projections and the second connecting projections; and a second transmission member disposed inside the first connecting projection and the second connecting projection, rotates together with the input connecting unit, is installed to protrude through the gap between a plurality of the first connecting projections and the second connecting projections, and is slidably overlapped with the first transmission member.

Images