Automatic door opening mechanism

Abstract

An automatic door opening mechanism used to drive an open-close body and having a driver, a transmission assembly, a screw assembly, a clutch assembly, and a plurality of brake members is provided. The transmission assembly is driven by the driver. The screw assembly includes a nut having a positioning groove and a screw rod connected to the open-close body and defined a longitudinal direction and a radial direction. The clutch assembly is arranged between the transmission assembly and the screw assembly and includes a retainer, an interactive structure arranged on an outer periphery of the nut, a latching structure arranged on an inner periphery of the transmission assembly, and a plurality of rolling balls movably accommodated in the retainer and located between the latching structure and the interactive structure. The brake members respectively have a slope corresponding to the rolling balls and are located in the positioning groove in a circular manner. When the open-close body drives the transmission assembly, the latching structure, and the retainer with the rolling balls to move relative to the screw assembly along the longitudinal direction, the rolling balls are lifted along the radial direction by the slopes. The clutch assembly changing from an engaged state to a disengaged state is therefore ensuring the rolling balls would not generate a noticeable jumping effect due to a jamming.

Description

[Technical Field]

[0001] This application relates to a mechanism for driving an opening and closing body to perform opening and closing actions, and in particular to a self-opening door actuator mechanism. [Previous Technology]

[0002] This application is an advanced version of the invention patent "Driver" filed by the applicant in Taiwan on March 20, 2024, under patent publication number TW202441060A.

[0003] In the third embodiment of the aforementioned old version of patent application TW202441060A, the clutch assembly 2b includes a retainer 29c, an interaction structure 21b, a locking ring 22c, a ball 28, and an auxiliary elastic element S; the transmission assembly 1 can be driven by the drive source 6; the aforementioned locking ring 22c is disposed around the inner periphery of the transmission assembly 1 and has a locking structure 224; the screw assembly 3 includes a nut 31c and a screw 32 screwed together, and the aforementioned interaction structure 21b is disposed around the outer periphery of the nut 31c; the aforementioned ball 28 is located between the locking structure 224 and the interaction structure 21b.

[0004] In the third embodiment of the old patent application, during the disengagement process of separation and engagement, the two balls 28 are pushed to the constriction port 2922 protruding from the retainer 29c by the elastic reset action of the auxiliary elastic element S. The part of each ball 28 protruding from the constriction port 2922 will correspond to the protrusion 2142 of the interaction structure 21b. Therefore, when each ball 28 is to be reset, it will first be stuck between the protrusion 2412 and the locking structure 224, and then the reset will be completed.

[0005] Because the third embodiment of the old patent application will inevitably have a noticeable bouncing sensation due to the jamming of each ball 28 during the disengagement process, it will not only affect the feel, but also make users wonder whether there is a malfunction, thus giving a cheap feeling.

[0006] Therefore, how to overcome the shortcomings of the prior art is a major issue that the inventors of this application are eager to solve. [Summary of the Invention]

[0007] The purpose of this application is to provide a self-opening door drive mechanism that, when the clutch assembly moves from the engaged state to the disengaged state, uses the inclined surface of the brake member to lift the ball bearings that would otherwise be stuck in the recess.

[0008] To achieve the above objective, this application provides a self-opening door actuator mechanism for driving an opening and closing body, comprising: a drive source; a transmission assembly driven by the drive source; a screwed assembly including a nut and a screw rod screwed together, one end of the screw rod being connected to the opening and closing body, the screw rod defining a length direction and a radial direction perpendicular to the length direction, the nut having a positioning groove; and a clutch assembly disposed between the transmission assembly and the screwed assembly, the nut being able to engage or disengage from the transmission assembly radially by means of the clutch assembly, the clutch assembly including a retainer, an interaction structure, a locking structure, and a plurality of balls, each of the balls being movable. The retainer is received radially from the bolted assembly. The locking structure is disposed around the inner periphery of the transmission assembly, and the interaction structure is disposed around the outer periphery of the nut. The plurality of balls are located between the locking structure and the interaction structure. A plurality of brakes are disposed around each other in the positioning groove and positioned by the positioning groove in the length direction. Each brake has at least one inclined surface corresponding to each ball. When the opening and closing body is subjected to an external force, the opening and closing body moves relative to the bolted assembly along the length direction, along with the transmission assembly, the locking structure, and the retainer. The retainer moves along with each ball, causing each ball to be lifted radially by each of the inclined surfaces.

[0009] Compared with the prior art, this application has the following advantages: it can ensure that when the clutch assembly changes from the engaged state to the disengaged state, the ball bearings will not produce obvious jumping sensation due to jamming.

Implementation Method

[0028] The detailed description and technical content of this application are illustrated below with reference to the accompanying drawings. However, the accompanying drawings are provided for reference and illustration only and are not intended to limit this application.

[0029] This application provides a self-opening door actuator mechanism for driving an opening and closing body to open and close relative to a main body, the main body being, for example, a vehicle, and the opening and closing body being, for example, a door installed on the vehicle, but this application does not limit it to this.

[0030] As shown in Figures 1 to 9, the self-opening door actuator mechanism of this application includes: a transmission component 1, a clutch component 2b, a screw connection component 3, a drive source 6, and at least one braking component 7. Specifically, it also includes a housing 5, two linkage rings 8, and two first washers 9. The self-opening door actuator mechanism of this application can be disposed on the aforementioned main body or on the opening / closing body. In this embodiment, it is described as being disposed on the opening / closing body, that is, the housing 5 of the self-opening door actuator mechanism is disposed on the opening / closing body, and the drive source 6 is disposed on the housing 5. It should be noted that all other components of the self-opening door actuator mechanism of this application, except for the housing 5 itself, are disposed on the housing 5.

[0031] The transmission assembly 1 is driven by the drive source 6 and can transmit the power of the drive source 6 to the screw assembly 3. This application does not limit how the transmission assembly 1 is driven or how it transmits power; it can be as shown in the figure or other methods. As shown in Figure 2, the aforementioned housing 5 includes a limiting part 50, and the transmission assembly 1 is rotatably disposed in the limiting part 50. Specifically, the transmission assembly 1 can be a spherical body 11 (including a first hemispherical structure 111 and a second hemispherical structure 112 combined with each other) as shown in Figures 2 and 8, and the transmission assembly 1 is correspondingly disposed within the limiting part 50.

[0032] As shown in Figures 2 and 8, the transmission assembly 1 includes a toothed ring 12 and the aforementioned spherical body 11. The toothed ring 12 is arranged around the outer periphery of the spherical body 11. The toothed ring 12 is engaged with the driving teeth 62 of the driving source 6, so that the transmission assembly 1 can be driven by the driving source 6. The toothed ring 12 is an annular body and its outer periphery is provided with a plurality of (at least two) driven protrusions (not indicated), so that when the transmission assembly 1 rotates, the driven protrusions can engage with the aforementioned driving teeth 62 and be driven by the driving teeth 62.

[0033] The screw assembly 3 includes a nut 31c and a screw 32 screwed together. In its normal state, the screw 32 has a longitudinal direction D1 and a radial direction D2 that are perpendicular to each other, as shown in Figure 1, with the longitudinal direction D1 parallel to the screw 32. The nut 31c is indirectly driven to rotate by the drive source 6, causing the screw 32 to extend or retract relative to the nut 31c along the longitudinal direction D1. One end of the screw 32 is connected to the aforementioned main body, so that the opening or closing body can be opened or closed by extending or retracting the screw 32.

[0034] This application does not limit the nut 31c. It can be a common thick ring shape used to screw into screws (not shown in the figure), or it can be a long cylindrical shape as shown in Figures 3 to 5. The long cylindrical nut 31c has a nut body 310, a first extension 311 and a second extension 312. The nut body 310 of the nut 31c can be radially engaged or radially disengaged from the transmission assembly 1. The first extension 311 and the second extension 312 extend from both sides of the nut body 310, and the extension method can be, for example, extending integrally with each other, or extending by being fixedly combined with each other.

[0035] The clutch assembly 2b has engagement and disengagement functions and is disposed between the transmission assembly 1 and the screw assembly 3 as shown in Figures 2 and 9, so that the nut 31c can engage or disengage from the transmission assembly 1 radially D2 by means of the clutch assembly 2b. That is, the clutch assembly 2b has an engaged state and a disengaged state. When the nut 31c engages with the transmission assembly 1, the clutch assembly 2b is in the engaged state, which allows the transmission assembly 1 to drive the nut 31c, thereby causing the screw 32 to move along the length direction D1; conversely, when the nut 31c disengages from the transmission assembly 1, the clutch assembly 2b is in the disengaged state, so that the transmission assembly 1 cannot drive the nut 31c.

[0036] As shown in Figures 3, 3-1, and 5, the clutch assembly 2b includes an interactive structure 21b, a locking structure 224, a plurality of balls 28, and a plurality of auxiliary elastic elements S. Specifically, the clutch assembly 2b further includes a locking ring 22c and a retainer 29c. The locking structure 224 is disposed around the inner periphery of the hollow transmission assembly 1; the interactive structure 21b is disposed around the outer periphery 2141 of the nut 31c. The interactive structure 21b has a protrusion 2142 and two recesses 2143 that are recessed relative to the protrusion 2142. As shown in Figure 9, the protrusion 2142 and the two recesses 2143 are arranged side by side along the length direction D1; the plurality of balls 28 are disposed between the locking structure 224 and the interactive structure 21b. In this embodiment, the interactive structure 21b surrounds the outer periphery 2141 of the nut 31c, and as shown in Figures 5, 9, and 16, two recesses 2143 are recessed radially D2 from the outer periphery 2141 of the nut 31c at intervals between each other, so that desired protrusions 2142 protrude relative to each other at the intervals between the two recesses 2143. It should be noted that the interactive structure 21b can be integrally formed with the nut body 310 (not shown in the figures), or it can be a combined structure with the nut body 310 as shown in Figures 3, 3-1, and 5.

[0037] The retainer 29c can be a single-piece structure (not shown in the figure) or a combined structure as shown in Figures 3 and 7, including a first retainer 2901 and a second retainer 2902 that can be combined with each other. As shown in Figures 3, 7 and 9, the retainer 29c has a plurality of receiving holes 292 and a plurality of channels 293. Each receiving hole 292 is opened along the radial direction D2. Each ball 28 is movably received in each receiving hole 292. Each channel 293 communicates between any two adjacent receiving holes 292. Each auxiliary elastic element S is received in each channel 293 and elastically supported between any two adjacent balls 28. The auxiliary elastic element S and the two balls 28 are combined to form an action component F, and the system has three sets of action components F as shown in the figure.

[0038] The retaining ring 22c, as shown in Figures 7 and 10, is disposed on the spherical body 11 and has the aforementioned retaining structure 224. The retainer 29c is disposed between the transmission assembly 1 and the nut 31c. The retaining structure 224 of the retaining ring 22c faces the first opening 2921c described later for each receiving hole 292. It should be noted that this application does not limit the retaining structure 224, as long as it has a retaining function. Furthermore, the retaining structure 224, through its design, allows each ball 28 to be retained between the retaining structure 224 and the interactive structure 21b. This application also does not limit how the retaining ring 22c is fixed to the transmission assembly 1. In detail, each receiving hole 292 has a first notch 2921c and a second notch 2922c located radially D2. The locking block 2241 extends into the retainer 29c from the first notch 2921c. A portion of each ball 28 can contact the locking structure 224 through the first notch 2921c, and another portion of each ball 28 is exposed toward the interaction structure 21b through the second notch 2922c, so that a portion and another portion of each ball 28 can act on the locking structure 224 and the interaction structure 21b respectively. Since each ball 28 is located radially D2 in each receiving hole 2921c, the locking block 2921c is located in the retainer 29c. The clutch assembly 2b of this application moves back and forth within 92, so that the nut 31c can be radially engaged or radially disengaged from the transmission assembly 1. As for the locking structure 224, it has the aforementioned plurality of locking blocks 2241 corresponding to the inner circumference of the transmission assembly 1. Each locking block 2241 has two locking protrusions 2242 and a release recess 2243 that is recessed relative to the locking protrusions 2242. The release recess 2243 is located between the two locking protrusions 2242. In the engaged state, each ball 28 is locked between the protrusion 2142 and one of the locking protrusions 2242 of each locking block 2241 as shown in FIG9.

[0039] As shown in Figures 2 and 8, a retainer 29c is provided inside the aforementioned spherical body 11 of the transmission assembly 1, and the locking structure 224 surrounds each ball 28 in the radial direction D2. Therefore, when an external force (other than the driving source 6) is applied to the opening and closing body, the opening and closing body will move relative to the screw assembly 3 along the length direction D1 using the housing 5, together with the locking structure 224 and the retainer 29c. At this time, since the locking structure 224 and the retainer 29c will move with the transmission assembly 1, the locking structure 224 and each actuating component F will be offset from the interaction structure 21b along the length direction D1 as shown in Figure 12, thereby allowing the transmission assembly 1 to disengage from the nut 31c.

[0040] As shown in Figures 3, 3-1, 5 and 9, the first extension 311 and the second extension 312 of the nut 31c have a first stop 3111 and a second stop 3122 respectively. A first elastic element 24b and a second elastic element 25b are respectively sleeved on the first extension 311 and the second extension 312, and the first elastic element 24b and the second elastic element 25b are elastically supported between the two sides of the retainer 29c and the first stop 3111 and the second stop 3122 respectively. Furthermore, the first extension 311 and the second extension 312 may each have a first positioning part 3113 and a second positioning part 3123. The first positioning part 3113 and the second positioning part 3123 are both located between the first stop part 3111 and the second stop part 3122 of the nut 31c, and the aforementioned interactive structure 21b is located between the first positioning part 3113 and the second positioning part 3123. In addition, the first positioning part 3113 and the second positioning part 3123 both protrude from the outer periphery 2141 of the nut 31c in a radially D2-like manner, so that the nut 31c forms an annularly concave positioning groove 314 between its outer periphery 2141 and the first positioning part 3113 and the second positioning part 3123.

[0041] The number of the aforementioned braking components 7 in the first embodiment is not limited in this application; the specific number will be described using the number corresponding to the number of actuating components F as an example. As shown in FIG. 5, each braking component 7 is arranged around each other within the positioning groove 314, so that each braking component 7 is positioned within the positioning groove 314, thereby allowing the nut 31c to move along the length direction (axial direction) D1 with each braking component 7. As shown in FIG. 10, each actuating component F is respectively disposed between any two adjacent braking components 7, so that the actuating component F can move relative to each braking component 7 along with the retainer 29c.

[0042] As shown in Figure 4, specifically, the brake member 7 has a plurality of outer edges and a front side 73 and a back side 74 facing each other. The plurality of outer edges surround and connect the periphery of the front side 73 and the periphery of the back side 74. Therefore, after each brake member 7 is disposed in the positioning groove 314, the back side 74 of each brake member 7 will face the aforementioned outer periphery 2141 of the nut 31c. The brake member 7 can be of any shape. In this embodiment, a rectangular sheet is used as an example for description. The plurality of outer edges include two first outer edges 71 facing each other and two second outer edges 72 facing each other. Any two adjacent brake members 7 are spaced apart by one of their first outer edges 71.

[0043] The brake element 7 has a notch 75 on each of its first outer edges 71, and the brake element 7 has two inclined surfaces 751 that are relatively inclined to each other in each notch 75. The distance between the two inclined surfaces 751 of each notch 75 is as shown in Figure 4-1, which gradually narrows from the front side 73 to the back side 74. The two inclined surfaces 751 have a first distance d1 at the front side 73 and a second distance d2 at the back side 74. The distance between the two inclined surfaces 751 gradually decreases from the first distance d1 to the second distance d2. It should be noted that each ball 28 is located between the two inclined surfaces 751 in each notch 75, and the two first outer edges 71 of each brake element 7 are parallel to the length direction D1. In addition, each auxiliary elastic element S elastically supports the two balls 28 between any two adjacent notches 75 of the brake element 7.

[0044] The brake member 7 can also be formed by having two spaced-apart and opposite cuts 7201 on each of the second outer edges 72, so as to form a rib 7203 and two shoulders 7202 that are recessed relative to the second outer edges 72. In other words, the part of the brake member 7 on the second outer edge 72 where the cuts 7201 are not made is the rib 7203, and the shoulders 7202 are located on both sides of the rib 7203. As shown in FIG5, each brake member 7 is positioned by the positioning groove 314 in the length direction D1 by the free ends of its two ribs 7203 (i.e., the remaining part of the second outer edge 72).

[0045] In detail, the notch 75 is opened from one of the first outer edges 71 toward the other first outer edge 71, and an inner edge 752 may be formed at the end point of each notch 75. Each notch 75 may be a flared opening, the width of which gradually narrows from the first outer edge 71 toward the inner edge 752. The notch 75 is formed between the two inclined surfaces 751 and the inner edge 752; in other words, the flared shape of each notch 75 is defined by the two inclined surfaces 751 and the inner edge 752.

[0046] In addition, as shown in Figures 8 and 9, the clutch assembly 2b further includes a first bearing 26 and a second bearing 27. The first bearing 26 is disposed between the first hemispherical structure 111 of the aforementioned spherical body 11 and the first retainer 2901, and the second bearing 27 is disposed between the second hemispherical structure 112 of the spherical body 11 and the second retainer 2902.

[0047] Thus, as shown in Figures 2 and 9 to 11, when the drive source 6 drives the transmission assembly 1 to start rotating, the retaining ring 22c will rotate together with the retainer 29c following the transmission assembly 1. At this time, since the balls 28, the retaining structure 224 and the interaction structure 21b interfere with each other in the radial direction D2 or overlap with each other in the radial direction D2, a portion of each ball 28 in the retainer 29c will be pushed and pressed by the retaining structure 224, so that each ball 28 is locked between the retaining structure 224 and the protrusion 2142, thereby causing the nut 31c to engage the transmission assembly 1. Thus, when the drive source 6 drives the transmission assembly 1 to rotate, the transmission assembly 1 can drive the nut 31c to rotate, causing the screw 32 to move along the length direction D1, thereby driving the opening and closing body to open or close.

[0048] Conversely, as shown in Figures 12 to 14, when the opening and closing body is subjected to external force by the user and moves along the length direction D1 along with the transmission component 1, the retainer 29c and the locking ring 22c, each ball 28 will move along the length direction D1 along with the retainer 29c. At this time, another part of each ball 28 will move from the protrusion 2142 toward the recess 2143, so that each ball 28 can pass through the inclined surface 751 of each brake component 7 before falling into the recess 2143, so that the inclined surface 751 can lift the ball 28 radially D2, thereby ensuring that each ball 28 will not fall into the recess 2143. Therefore, when each ball 28 wants to return to its original position, it will no longer be stuck in the recess 2143 and produce a noticeable jumping sensation. Moreover, at this time, each ball 28 is no longer held by the locking structure 224, thereby causing the transmission component 1 to disengage from the nut 31c. In this case, even if the screw 32 is in a driven state, since the transmission component 1 disengages from the nut 31c instantly, the transmission component 1 cannot drive the nut 31c to rotate. The opening and closing body then operates according to the external force applied by the user. It should be noted that in this situation, the nut 31c rotates relative to the screw 32 due to the influence of the external force.

[0049] Furthermore, in this embodiment, during the disengagement process described above, each of the functional components F is subject to the elastic reset effect of the auxiliary elastic element S. Therefore, the ball 28, which would normally be pushed down into the recess 2143, is not pushed down into the recess 2143 because it is lifted by the inclined surface 751.

[0050] As shown in Figures 4, 4-1, and 9 to 12, regarding the two inclined surfaces 751 formed in each notch 75, it can be understood that their inclination direction is relatively inclined to each other along the length direction D1, and the opening width of the flared mouth defined by the two inclined surfaces 751 of each notch 75 gradually narrows from the first outer edge 71 to the inner edge 752 along the surrounding path of all the active components F. The opening width between the two inclined surfaces 751, which gradually narrows from the first outer edge 71 to the inner edge 752 along the surrounding path of all the active components F, serves to: when the two balls 28 of each active component F move along the length direction D1, it can relatively compress the auxiliary elastic element S between the two balls 28. Therefore, by means of the inclination direction of the two inclined surfaces 751 being relatively inclined to each other along the length direction D1, and the opening width of each notch 75 defined by the two inclined surfaces 751 being gradually narrowed from the first outer edge 71 to the inner edge 752 along the surrounding path of all the active components F, the ball 28 can be effectively disengaged from the engagement state.

[0051] When the opening and closing body moves the nut 31c relative to the screw 32, the nut 31c will rotate relative to the screw 32. At this time, if the brake 7 is a metal part and the nut 31c is, for example, a plastic part, a large frictional force will be generated between the metal and the plastic. Moreover, the brake 7 rubs against the nut 31c with the free end of its protruding rib 7203. As a result, the brake 7 will be displaced due to friction, or the plastic nut 31c will be damaged due to friction.

[0052] To prevent such problems, as shown in Figures 3, 3-1, 5, and 9, the screw assembly 3 may further include two metal first washers 9, which are respectively clamped between the first positioning part 3113 and one of the protruding ribs 7203 of the braking member 7, and between the second positioning part 3123 and the other protruding rib 7203 of the braking member 7. In this way, the metal protruding ribs 7203 and the metal first washers 9 rub against each other, so not only will the braking member 7 not be displaced, but the nut 31c will also not be worn.

[0053] The screw assembly 3 may also include two metal second washers 38, which are elastically pushed by the first elastic element 24b and the second elastic element 25b respectively to adhere to the first stop portion 3111 and the second stop portion 3122, so that the first elastic element 24b and the second elastic element 25b can rub against the two second washers 38 respectively, thereby having an anti-wear effect similar to that of the first washer 9.

[0054] Since the first elastic element 24b and the second elastic element 25b cannot be completely identical in actual manufacturing (there is a tolerance), one of them must have a greater elastic force than the other. This causes the locking structure 224 to be unable to be on the same straight line (or the same plane) as the interactive structure 21b in the radial direction D2 when the two are elastically supported. That is, the clutch assembly 2b, which should be in the engaged state, cannot be engaged because there is a tolerance between the first elastic element 24b and the second elastic element 25b.

[0055] To prevent such problems from occurring, as shown in Figures 3, 4 to 6 and 9, the self-opening door actuator mechanism of this application also includes two linkage rings 8. The two linkage rings 8 are respectively sleeved on the first and second extensions 311 and 312 of the nut 31c. Taking one of the linkage rings 8 as an example, one side of this linkage ring 8 will be in contact with one side of the retainer 29c and the two shoulders 7202 of one end of each brake member 7. The other side of this linkage ring 8 is elastically pushed by one of the first and second elastic elements 24b and 25b. As for the other linkage ring 8 and its connection relationship, it is symmetrical to the above. Therefore, one side of this other linkage ring 8 can also be in contact with the other side of the retainer 29c and the two shoulders 7202 of the other end of each brake member 7. Moreover, the other side of this other linkage ring 8 is elastically pushed by the other of the first and second elastic elements 24b and 25b.

[0056] In this way, since one end of the first elastic element 24b pushes one side of the retainer 29c and the two shoulders 7202 of one end of each brake member 7 together via one of the linkage rings 8, and one end of the second elastic element 25b also pushes the other side of the retainer 29c and the two shoulders 7202 of the other end of each brake member 7 together via the other linkage ring 8, regardless of whether there is a work error between the first elastic element 24b and the second elastic element 25b, it can be ensured that the locking structure 224 is necessarily located on the same straight line (or the same plane) as the interactive structure 21b in the radial direction D2, thus ensuring that the clutch assembly 2b is engaged.

[0057] Furthermore, taking Figure 9 as an example, when an external force intervenes, such as when a user applies force to the opening and closing body, causing the opening and closing body, along with the housing 5, the transmission assembly 1, the retainer 29c, and each of the actuating components F disposed on the housing 5, to move towards, for example, the left side of the retainer 29c will push the left-side linkage ring 8 to compress the left-side first elastic element 24b. The right-side linkage ring 8 will be blocked by the shoulder 7202 of the brake member 7 and will move away from the right side of the retainer 29c. Therefore, at this time, only the left-side first elastic element 24b provides the elastic force for the retainer 29c to return to its original position. In this way, the design of the first and second elastic elements 24b and 25b can avoid the situation where the first and second elastic elements 24b and 25b on both sides exert force on the retainer 29c simultaneously.

[0058] It should be noted that, in the case of adding two linkage rings 8, in order to ensure that the two protruding ribs 7203 of each brake component 7 can still abut against the two first washers 9 at their free ends, as shown in Figures 3 and 6, the linkage ring 8 can be hollow and have an inner edge 81, and a plurality of recesses 811 are provided on the inner edge 81 of the linkage ring 8, so that the two protruding ribs 7203 of each brake component 7 can movably abut against the two first washers 9 through the recesses 811 extending from the two linkage rings 8.

[0059] Furthermore, to prevent the back surface 74 (metal part) of each brake component 7 from experiencing a scraping sensation or damage to the protrusion 2142 (metal part) on the nut 31c due to friction, as shown in FIG11, a gap G can be maintained between the back surface 74 of each brake component 7 and the protrusion 2142 by any feasible means. For example, the two protruding ribs 7203 of each brake component 7 can be raised above the required gap G by abutting against the two first washers 9. It should be noted that in this embodiment, the protrusion height of the protrusion 2142 is flush with the outer periphery 2141 of the first extension 311 and the second extension 312.

[0060] As shown in Figures 3, 7 and 11, in order to allow each braking element 7 to move only along the length direction D1 relative to the retainer 29c, a plurality of guide grooves 294 are provided in an inner peripheral wall (without element symbols) of the retainer 29c along the length direction D1. Each braking element 7 can be slidably accommodated in each guide groove 294, so that each braking element 7 can be guided by each guide groove 294 and can move only along the length direction D1 relative to the retainer 29c.

[0061] As shown in Figures 15 and 16, this is the second embodiment of the brake member 7 in this application. The brake member 7 of the second embodiment is generally the same as the brake member 7 of the first embodiment described above, except that the way the gap G is generated is different.

[0062] As shown in Figures 15 and 16, two supports 741 protrude from the back surface 74 of each brake element 7. Specifically, these two supports 741 correspond to two protruding ribs 7203 respectively. In this way, the back surface 74 of each brake element 7 can be supported by the two supports 741 on the outer periphery 2141 of the nut 31c and raised, that is, the required gap G can be generated between the back surface 74 of each brake element 7 and the outer periphery 2141 (or protrusion 2142).

[0063] In summary, the self-opening door drive mechanism of this application can indeed achieve the expected use purpose and effect, and can solve the shortcomings of the prior art. Therefore, this patent application is filed.

[0064] The above description is only a preferred embodiment of this application and does not limit the scope of the patent of this application. All equivalent structural changes made by using the content of this application specification and drawings are also included in the scope of the rights of this application and are hereby stated. [Simplified Explanation of the Diagram]

[0010] Figure 1 is a three-dimensional schematic diagram of this application.

[0011] Figure 2 is a schematic longitudinal section of this application.

[0012] Figure 3 is an exploded perspective view of some of the components in this application.

[0013] Figure 3-1 is an enlarged view of the first embodiment of the present application based on the nut and brake component in Figure 3.

[0014] Figure 4 is a perspective view of the first embodiment of the braking component in this application.

[0015] Figure 4-1 is a partial cross-sectional schematic diagram of this application based on Figure 4.

[0016] Figure 5 is a perspective view of the first embodiment of the brake component in this application when it is disposed on a nut.

[0017] Figure 6 is a three-dimensional schematic diagram of the present application when a linkage ring is added, based on Figure 5.

[0018] Figure 7 is an enlarged view of some of the components in Figure 3 according to this application.

[0019] Figure 8 is a perspective view of this application when partially combined with Figure 3.

[0020] Figure 9 is a cross-sectional view of the present application in the joined state along the length direction.

[0021] Figure 10 is a cross-sectional view of the present application in the joined state along the radial section.

[0022] Figure 11 is another cross-sectional view of the present application in the joined state along the radial section.

[0023] Figure 12 is a cross-sectional view of the present application in the disassembled state along the length direction.

[0024] Figure 13 is a cross-sectional view of the present application in the detached state along the radial section.

[0025] Figure 14 is a three-dimensional schematic diagram of the nut, ball and brake in the present application in the disengaged state.

[0026] Figure 15 is a perspective view of the second embodiment of the braking component in this application.

[0027] Figure 16 is a partial cross-sectional view of the second embodiment of the brake in this application when it is disposed on a nut.

Claims

1. A self-opening door actuator mechanism for driving an opening / closing body, comprising: One driving source; A transmission component is driven by this drive source; A screwed assembly includes a nut and a screw threaded together, one end of the screw thread being connected to the opening / closing body, the screw thread defining a length direction and a radial direction perpendicular to the length direction, the nut having a positioning groove; a clutch assembly disposed between the transmission assembly and the screwed assembly, the nut being able to engage or disengage from the transmission assembly radially by means of the clutch assembly, the clutch assembly including a retainer, an interaction structure, a locking structure and a plurality of balls, each ball being movably received in the retainer radially, the locking structure being disposed around the inner periphery of the transmission assembly, the interaction structure being disposed around the outer periphery of the nut, the plurality of balls being located between the locking structure and the interaction structure; and a plurality of brakes disposed around each other in the positioning groove and positioned by the positioning groove in the length direction, each brake having at least one inclined surface corresponding to each ball; When the opening and closing body is subjected to an external force, the opening and closing body, together with the transmission assembly, the locking structure and the retainer, moves along the length direction relative to the screw assembly, and the retainer moves along with each of the balls, so that each of the balls is lifted by each of the inclined surfaces along the radial direction.

2. The self-opening door actuator mechanism as claimed in claim 1, wherein each of the brake members has a front side and a back side facing each other, each brake member faces the outer periphery of the nut with the back side facing each other, each brake member has two notches and two inclined surfaces facing each other in each notch, each ball is located between the two inclined surfaces of each notch, and the distance between the two inclined surfaces of each notch gradually narrows from the front side toward the back side.

3. The self-opening door actuator mechanism as described in claim 2, wherein each of the brakes further has a plurality of outer edges surrounding the periphery of the front side and the periphery of the back side, the plurality of outer edges including two first outer edges opposite to each other, each of the first outer edges being parallel to the length direction, and each of the first outer edges of each brake is provided with the notch.

4. The self-opening door actuator mechanism as described in claim 3, wherein the clutch assembly further includes a plurality of auxiliary elastic elements, each of the auxiliary elastic elements being elastically supported between any two adjacent balls, each notch being formed into a flared opening from one of the first outer edges toward the other first outer edge and forming an inner edge within each notch, the width of the flared opening being gradually narrowed from the first outer edge toward the inner edge, and each of the auxiliary elastic elements elastically supporting two balls between any two adjacent notches of the brake members.

5. The self-opening door actuator mechanism as claimed in claim 1, wherein the retainer has an inner peripheral wall with a plurality of guide grooves along the length direction, and each brake member can only move relative to the retainer along the length direction under the guidance of each guide groove.

6. The self-opening door actuator mechanism as claimed in claim 1, wherein the nut is cylindrical, the nut having a first positioning portion and a second positioning portion spaced apart from each other along the length direction and surrounding the outer periphery, the positioning groove being formed between the first positioning portion, the second positioning portion and the outer periphery, each of the brake members having a plurality of outer edges surrounding each other, the plurality of outer edges including two second outer edges opposite each other, each brake member corresponding to the first positioning portion and the second positioning portion respectively with the two second outer edges.

7. The self-opening door actuator mechanism as described in claim 6, wherein the screw assembly further includes two washers, the two washers being respectively clamped between the first positioning portion and one of the second outer edges and between the second positioning portion and the other of the second outer edges.

8. The self-opening door actuator mechanism as claimed in claim 1, wherein the clutch assembly further includes a first elastic element and a second elastic element, the nut is cylindrical and sleeved with the first elastic element and the second elastic element, the nut has a first stop portion and a second stop portion spaced apart from each other along the length direction and surrounding the outer periphery, the retainer has two opposing sides, the first elastic element and the second elastic element are elastically supported between the first stop portion and one of the sides and between the second stop portion and the other side, respectively.

9. The self-opening door actuator mechanism as described in claim 8 further includes two linkage rings, each of the brake members having a plurality of outer edges surrounding each other, the plurality of outer edges including two second outer edges opposite each other, each brake member having two shoulders formed by openings in the two second outer edges, each brake member being positioned in the longitudinal direction by the positioning groove with the remaining portions of the two second outer edges, both linkage rings being fitted onto the nut, one of the linkage rings being in common contact with one of the shoulders of each brake member and one of the sides of the retainer and being elastically supported by the first elastic element, and the other linkage ring being in common contact with another shoulder of each brake member and another side of the retainer and being elastically supported by the second elastic element.

10. The self-opening door actuator mechanism as claimed in claim 9, wherein the linkage ring has an inner edge, each linkage ring having a plurality of notches on the inner edge, and the remaining portion of the brake member on the two second outer edges passing through the notches of the two linkage rings respectively.

11. The self-opening door actuator mechanism as claimed in claim 1, wherein each of the brakes has a back face, each brake facing the outer periphery of the nut with the back face facing the outer periphery of the nut, and a gap is formed between the back face of each brake and the outer periphery of the nut.

12. The self-opening door actuator mechanism as claimed in claim 1, wherein each of the brakes has a back surface and at least one support protruding from the back surface, each brake being supported on the outer periphery of the nut by the at least one support, and a gap being formed between the back surface of each brake and the outer periphery of the nut.

13. The self-opening door actuator mechanism as claimed in claim 1, wherein the interactive structure has a protrusion and at least one recess that are opposite to each other, and the nut engages the transmission component when the plurality of balls are engaged between the engagement structure and the protrusion.

14. The self-opening door actuator mechanism as claimed in claim 1, wherein the interactive structure has a protrusion and at least one recess that are opposite to each other, and when the opening / closing body is subjected to an external force and moves the transmission assembly together with the locking structure and the retainer along the length direction, the plurality of balls will move along the length direction from the protrusion toward the recess along the retainer and be lifted radially by each of the ramps, thereby disengaging the transmission assembly from the nut.

15. The self-opening door actuator mechanism as claimed in claim 1 further includes a housing having a limiting portion on which the transmission component is rotatably disposed.

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