Automatic opening and closing device for clutch and small cover plate of automobile

Abstract

The embodiment of the utility model provides a clutch and an automatic opening and closing device of an automobile small cover plate, the clutch is used for transmitting power between the automobile small cover plate and a power mechanism used for driving the small cover plate to be opened and closed, the clutch comprises a rotating member, the axis of the rotating member is provided with a center hole, and the hole wall of the center hole is provided with a clamping groove; one end of the rotating shaft serves as an inserting end to be inserted into the center hole; the torsion spring comprises a spring body which is formed by spirally winding a spring wire and sleeves the inserting end of the rotating shaft, a first spring arm which extends out from one tail end of the spring wire along the radial direction of the spring body, and a second spring arm which extends out from the other tail end of the spring wire along the axial direction of the spring body, and the first spring arm is inserted into the clamping groove; the C-shaped clamp spring is clamped at the inserting end of the rotating shaft and is arranged in the central hole; and the second spring arm is inserted into an opening between two free ends of the C-shaped clamp spring and is propped against at least one free end. According to the embodiment, the small cover plate can be safely and manually wrenched, and the wrenching direction can be distinguished.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to the technical field of automobile accessories, and particularly relates to an automatic opening and closing device for a clutch and a small cover plate of an automobile. BACKGROUND

[0002] A small cover plate, such as a charging end cover (for an electric vehicle) or a fuel tank cover (for a fuel vehicle), is usually designed on an automobile, and the small cover plate can be automatically opened and closed by a matched automatic opening and closing device.

[0003] An existing automatic opening and closing device for a small cover plate mainly comprises a power mechanism for driving the opening and closing of the small cover plate, and a clutch having one end in transmission connection with an output end of the power mechanism and the other end in transmission connection with a pivot of the small cover plate. The clutch is configured to allow manual opening and closing of the small cover plate and to automatically open and close the small cover plate. The clutch further comprises a rotating member, a center hole is arranged at an axis of the rotating member, a clamping groove is arranged on an inner wall of the center hole, a rotating shaft is arranged in the center hole with one end as a plug-in end, one of the rotating member and the rotating shaft is in transmission connection with the output end of the power mechanism and the other is in transmission connection with the pivot of the small cover plate, a torsional spring comprises a spring body sleeved on the plug-in end of the rotating shaft and a spring arm extending radially from one end of the spring body, the spring arm is plugged into the clamping groove, and the spring arm is stressed from different directions when the rotating shaft rotates in different directions, so that the torsional spring is relatively expanded or tightened. When the spring body is relatively expanded, the spring body is relatively slid with the rotating shaft. When the spring body is relatively tightened, the spring body is relatively tightened with the rotating shaft, and the frictional resistance between the two is increased. Therefore, when the small cover plate is manually pulled, the clutch can feedback different sizes of resistance.

[0004] However, the inventor found in the specific implementation that, in specific use, the torsional spring only relies on one spring arm to relatively expand or tighten the rotating shaft, and the resistance proportion of the clutch is relatively small when the small cover plate rotates in different directions. In addition, the resistance feedbacked by the torsional spring in different rotating directions is usually relatively small, and when the user manually pulls the small cover plate with excessive force, the small cover plate and / or the clutch are easily damaged, and the safety is poor. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the embodiment of the utility model is to provide a clutch that can provide appropriate resistance when manually pulling a small cover plate to ensure safety.

[0006] The further technical problem to be solved by the embodiment of the utility model is to provide an automatic opening and closing device for a small cover plate of an automobile that can provide appropriate resistance when manually pulling the small cover plate to ensure safety.

[0007] To solve the above technical problems, the utility model embodiment first provides the following technical scheme: a clutch is used for transmitting power between a small cover plate of an automobile and a power mechanism for driving the small cover plate to open and close, the clutch comprises:

[0008] A rotary part is provided with a center hole at the shaft center, and the hole wall of the center hole is provided with a clamping groove;

[0009] A rotating shaft is inserted into the center hole with one end as a plug-in end, one of the rotary part and the rotating shaft is in transmission connection with the output end of the power mechanism, and the other is in transmission connection with the pivot of the small cover plate;

[0010] A torsional spring comprises a spring body that is spirally wound by spring wire and is sleeved on the plug-in end of the rotating shaft, a first spring arm that is radially extended along the spring body from one end of the spring wire, and a second spring arm that is axially extended along the spring body from the other end of the spring wire, and the first spring arm is inserted into the clamping groove; and

[0011] A C-shaped clamping spring is assembled on the plug-in end of the rotating shaft axially and side by side with the torsional spring, the C-shaped clamping spring is clamped on the plug-in end of the rotating shaft and is placed in the center hole, the second spring arm is inserted into the opening between the two free ends of the C-shaped clamping spring and abuts against one of the free ends.

[0012] Further, the inner hole of the spring body is in interference fit with the plug-in end.

[0013] Further, the rotary part is an outer gear ring, and the outer tooth surface of the outer gear ring is in transmission fit with the output end of the power mechanism.

[0014] Further, the side face of the outer gear ring away from the rotating shaft is formed with an end cover, and the end face of the plug-in end abuts against the end cover.

[0015] Further, the inner side face of the end cover is further axially protruded with a positioning protruding column in the middle part, the end face of the plug-in end is provided with a positioning insertion hole, and the positioning protruding column is inserted and positioned in the positioning insertion hole.

[0016] Further, the middle segment of the rotating shaft is further radially protruded to form a stop part, and one side face of the C-shaped clamping spring abuts against the stop part.

[0017] Further, the stop part is also inserted into the center hole.

[0018] Further, the clamping groove is formed with a side opening that penetrates to one end face in the axial direction of the rotary part, and the first spring arm is inserted into the clamping groove from the side opening.

[0019] Further, the end of the rotating shaft away from the insertion end is provided with a transmission gear, and the transmission gear is in transmission connection with the pivot of the small cover plate.

[0020] In another aspect, in order to solve the above further technical problems, the utility model discloses the following technical scheme: an automatic opening and closing device of an automobile small cover plate, including the power mechanism for driving the opening and closing of small cover plate and the clutch as described in any one of the above.

[0021] After the above technical scheme is adopted, the utility model has at least the following beneficial effects: the utility model adds the second spring arm that extends along the axial direction of the spring body to the other end of the torsional spring, and the C-shaped clamping spring is additionally arranged on the insertion end of the rotating shaft in the axial direction and side by side with the torsional spring, the C-shaped clamping spring is clamped on the insertion end of the rotating shaft and placed in the central hole, and because the second spring arm of the torsional spring extends into the opening between the two free ends of the C-shaped clamping spring and abuts against at least one of the free ends, when the small cover plate of the automobile is manually pulled in different directions, the second spring arm of the torsional spring is blocked by different free ends of the C-shaped clamping spring, so that the first spring arm and the second spring arm are relatively expanded or clamped from both ends of the spring body, at this time, the resistance provided by the torsional spring is greater, and the resistance provided by the C-shaped clamping spring is greater, so that the small cover plate can be rotated more stably, and the small cover plate and / or the clutch can be prevented from being damaged due to excessive force when the small cover plate is manually pulled, and the operator can still distinguish the pulling direction according to the size of the felt resistance. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a split structure schematic view of an optional embodiment of the clutch of the utility model.

[0023] Figure 2 It is a structure schematic view of the torsional spring and the C-shaped clamping spring assembled to the rotating shaft of an optional embodiment of the clutch of the utility model.

[0024] Figure 3 It is an assembly structure schematic view of an optional embodiment of the clutch of the utility model.

[0025] Figure 4 It is a cross-sectional structure schematic view of an optional embodiment of the automatic opening and closing device of the automobile small cover plate of the utility model.

[0026] Figure 5 It is a cross-sectional schematic view of an optional embodiment of the clutch of the utility model. DETAILED DESCRIPTION

[0027] The application will be described in further detail below with reference to the drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only intended to explain the present application and are not intended to limit the present application, and, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0028] As shown in Figures 1-5 An optional embodiment of the present application provides a clutch 1 for transmitting power between a small cover plate 3 of a vehicle and a power mechanism 5 for driving the small cover plate 3 to open and close, the clutch 1 comprising:

[0029] A rotating member 10, the rotating member 10 being provided with a central hole 101 at an axis thereof, a clamping groove 103 being provided on a hole wall of the central hole 101;

[0030] A rotating shaft 12, the rotating shaft 12 being inserted into the central hole 101 with one end as a plug-in end 12a, one of the rotating member 10 and the rotating shaft 12 being in driving connection with an output end of the power mechanism 5 and the other being in driving connection with a pivot 30 of the small cover plate 3;

[0031] A torsional spring 14, the torsional spring 14 comprising a spring body 141 spirally wound by a spring wire and sleeved on the plug-in end 12a of the rotating shaft 12, a first spring arm 143 radially extended from one end of the spring wire along the spring body 141, and a second spring arm 145 axially extended from the other end of the spring wire along the spring body 141, the first spring arm 143 being inserted into the clamping groove 103; and

[0032] A C-shaped clamping spring 16, the C-shaped clamping spring 16 being assembled on the plug-in end 12a of the rotating shaft 12 in axial and side-by-side manner with the torsional spring 14, the C-shaped clamping spring 16 being clamped on the plug-in end 12a of the rotating shaft 12 and placed in the central hole 101, the second spring arm 145 being inserted into an opening 163 between two free ends 161 of the C-shaped clamping spring 16 and abutting against one of the free ends 161.

[0033] The utility model discloses a torsional spring 14's another end adds the second spring arm 145 that stretches out along the spring body 141 axial, and clutch 1 still adds the C -shaped snap spring 16 with torsional spring 14 axial side -by -side assembly on the plug -in end 12a of pivot 12, the C -shaped snap spring 16 clamps on the plug -in end 12a of pivot 12 and is placed in the center hole 101, and because the second spring arm 145 of torsional spring 14 stretches into the opening 163 between two free ends 161 of C -shaped snap spring 16 and at least with one free end 161 abuts, therefore, when manually pulls the small cover plate 3 of car to different directions, the second spring arm 145 of torsional spring 14 will be blocked by different free ends 161 of C -shaped snap spring 16, so that first spring arm 143 and second spring arm 145 will make spring body 141 relatively open or relatively tighten from both ends of spring body 141, at this moment, the resistance provided by torsional spring 14 is greater, and at the same time, the resistance provided by C -shaped snap spring 16, so that not only greater resistance can be provided, but also the small cover plate 3 can be rotated more smoothly, and the small cover plate and / or clutch can not be damaged due to excessive force when manually pulling the small cover plate 3, and the operator can still distinguish the pulling direction according to the size of the felt resistance.

[0034] In addition, when the user pulls the small cover plate 3 of car, if pulls to the direction of the free end 161 abutting the second spring arm 145, because directly blocked by the free end 161, at this moment, the C -shaped snap spring 16 can provide resistance immediately, therefore, the user pulls relatively hard; if pulls the small cover plate 3 to the other opposite direction, the second spring arm 145 needs to move from one free end 161 to the other free end 161 and is blocked by the free end 161 at the initial stage, and the C -shaped snap spring 16 does not provide resistance during the moving process, therefore, the user can save more energy at the initial stage of pulling.

[0035] In an optional embodiment of the utility model, the inner hole of the spring body 141 is interference fit with the plug -in end 12a. In this embodiment, the inner hole of the spring body 141 is interference fit with the plug -in end 12a, and the frictional resistance between the spring body 141 and the plug -in end 12a is greater, so that the small cover plate 3 can be rotated more smoothly when manually pulled, and the small cover plate and / or clutch can not be damaged due to excessive force.

[0036] In an optional embodiment of the utility model, as shown in Figures 1-4 The outer gear ring 10 is the outer gear ring, and the outer gear ring 10 is in transmission cooperation with the output end of the power mechanism 5. In this embodiment, the outer gear ring is used as the rotary member 10, and the outer gear ring 10 is in transmission cooperation with the output end of the power mechanism 5, so that the rotary power can be effectively transmitted. It can be understood that the rotary member 10 can also be connected in transmission cooperation with the power mechanism 5 through other transmission modes, such as a synchronous belt wheel transmission pair.

[0037] In an optional embodiment of the present application, as shown in Figures 1-4 The side of the outer gear ring 10 away from the rotating shaft 12 is formed with an end cover 105, and the end face of the plug-in end 12a abuts against the end cover 105. In this embodiment, the end cover 105 is further provided to effectively block the rotating shaft 12 and the torsion spring 14 and the C-shaped clasp spring 16 thereon.

[0038] In an optional embodiment of the present application, as shown in Figure 2 and Figure 4 The inner side of the end cover 105 is further formed with a positioning protruding column 106 in the middle part in the axial direction, and the end face of the plug-in end 12a is provided with a positioning insertion hole 121, and the positioning protruding column 106 is inserted and positioned in the positioning insertion hole 121. In this embodiment, the positioning protruding column 106 of the end cover 105 is inserted and matched with the positioning insertion hole 121 of the plug-in end 12a to effectively coaxially position the rotary part 10 and the rotating shaft 12.

[0039] In an optional embodiment of the present application, as shown in Figures 1-4 The middle section of the rotating shaft 12 is further formed with a blocking part 123 in the radial direction, and one side of the C-shaped clasp spring 16 abuts against the blocking part 123. In this embodiment, the blocking part 123 is further provided to cooperate with the end cover 105 to block the C-shaped clasp spring 16 and the torsion spring 14 from both sides.

[0040] In an optional embodiment of the present application, as shown in Figures 2-4 The blocking part 123 is also inserted into the center hole 101. In this embodiment, when the plug-in end 12a is inserted into the center hole 101, the blocking part 123 is also inserted into the center hole 101, and the assembly structure is simple and requires less space, so that a compact clutch 1 can be realized.

[0041] In an optional embodiment of the present application, as shown in Figure 1 and Figure 4 The clamping groove 103 is formed with a side opening 1030 in the axial direction of the rotary part 10 to an end face in the axial direction of the rotary part 10, and the first spring arm 143 is inserted into the clamping groove 103 from the side opening 1030. In this embodiment, the clamping groove 103 is formed with the side opening 1030 to facilitate the first spring arm 143 to be loaded into the clamping groove 103.

[0042] In an optional embodiment of the present application, as shown in Figures 1-4As shown, the rotating shaft 12 is provided with a transmission gear 125 at one end away from the plug-in end 12a, and the transmission gear 125 is in transmission connection with the pivot 30 of the small cover plate 3. In this embodiment, the transmission gear 125 is arranged at the other end of the rotating shaft 12, and the pivot 30 of the small cover plate 3 can be in transmission connection with the rotating shaft 12 through corresponding gear structure.

[0043] On the other hand, as Figure 4 shown, the utility model embodiment further provides an automatic opening and closing device of an automobile small cover plate, which comprises a power mechanism 5 for driving the small cover plate 3 to open and close and the clutch as described in any of the above embodiments. In this embodiment, the automatic opening and closing device of the automobile small cover plate adopts the clutch 1, and can provide appropriate resistance when manually pulling the small cover plate 3 to ensure safety. In the Figure 4 , only the transmission connection structure of the clutch 1, the power mechanism 5 and the pivot 30 of the small cover plate 3 is simply shown, and in actual implementation, a multi-stage gear transmission structure can be arranged.

[0044] The embodiments of the utility model are described above in combination with the drawings, but the utility model is not limited to the above specific embodiments, and the above specific embodiments are only illustrative but not restrictive, and those skilled in the art can make many forms under the inspiration of the utility model without departing from the purpose of the utility model and the scope protected by the claims, and these all belong to the protection scope of the utility model.

Claims

1. A clutch for transmitting power between a small cover plate of a vehicle and a power mechanism for driving the small cover plate to open and close, the clutch comprising: a rotating member provided with a central hole at an axial center thereof, the hole wall of the central hole being provided with a clamping groove; a rotating shaft inserted into the central hole with one end as a plug-in end, one of the rotating member and the rotating shaft being in driving connection with an output end of the power mechanism and the other being in driving connection with a pivot of the small cover plate; a torsion spring comprising a spring body spirally wound by a spring wire and sleeved on the plug-in end of the rotating shaft and a first spring arm radially extended from one end of the spring wire along the spring body, the first spring arm being inserted into the clamping groove; characterized in that the torsion spring further comprises a second spring arm axially extended from the other end of the spring wire along the spring body, and the clutch further comprises: a C-shaped clamping spring assembled on the plug-in end of the rotating shaft axially and side by side with the torsion spring, the C-shaped clamping spring being clamped on the plug-in end of the rotating shaft and placed in the central hole, the second spring arm being inserted into an opening between two free ends of the C-shaped clamping spring and abutting against one of the free ends. The inner hole of the spring body is in interference fit with the plug-in end. The rotating member is an outer gear ring, the outer tooth flanks of the outer gear ring being in driving fit with the output end of the power mechanism. An end cover is formed on the side of the outer gear ring away from the rotating shaft, the end face of the plug-in end abutting against the end cover. A positioning protruding column is further axially protruded in the middle of the inner side of the end cover, a positioning insertion hole is provided in the middle of the end face of the plug-in end, the positioning protruding column is inserted and positioned in the positioning insertion hole. A stop portion is further radially protruded in the middle segment of the rotating shaft, one side face of the C-shaped clamping spring abutting against the stop portion.

2. The clutch of claim 1, wherein, The stop portion also corresponds to being inserted into the central hole.

3. The clutch of claim 1, wherein The clamping groove is formed with a side opening through to one end face of the rotating member in the axial direction of the rotating member, the first spring arm being inserted into the clamping groove from the side opening.

4. The clutch of claim 3, wherein A driving gear is provided on the end of the rotating shaft away from the plug-in end, the driving gear being in driving connection with the pivot of the small cover plate.

5. The clutch of claim 4 wherein, The automatic opening and closing device further comprises the clutch according to any one of claims 1-9.

6. The clutch of claim 1, wherein, ​ 7. The clutch of claim 6 wherein, ​ 8. The clutch of claim 1, wherein, ​ 9. The clutch of claim 1, wherein, ​ 10. An automatic opening and closing device for a small cover of an automobile, comprising a power mechanism for driving opening and closing of the small cover, characterized in that, ​

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