Torque limiter and opening / closing member driving device using same

Abstract

The utility model relates to a torque limiter and an opening and closing part driving device using the torque limiter, and the torque limiter comprises a first gear which comprises a tooth-shaped part and an elastic part which is connected with the tooth-shaped part and is suitable for being extruded to deform; the elastic part is a cylindrical body which is formed by extending along the axial direction of the tooth-shaped part towards one side far away from the tooth-shaped part; a clutch structure is arranged on the outer side wall of the elastic part; the second gear comprises a gear main body and a containing cavity which is formed in the gear main body and is suitable for the elastic part to be partially inserted; a joint structure matched with the clutch structure is arranged on the cavity wall of the accommodating cavity; the clutch structure comprises a slipping part and an annular matching part which are arranged in the axial direction of the tooth-shaped part. And the joint structure comprises a joint part which is arranged along the axial direction of the gear main body and is suitable for being in concave-convex fit with the slipping part and an annular joining part which is matched with the annular matching part. The utility model can give consideration to the stability of the use state and reduce the radial size to adapt to the situation that the application scene space is limited.

Description

TECHNICAL FIELD

[0001] The utility model relates to transmission gear technology field especially, it relates to a torque limiter and use its open and close part drive arrangement. BACKGROUND

[0002] The open and close part drive arrangement can be applied in, for example but not limited to, the cover of intelligent closestool, the door opening mechanism of dishwasher, washing machine, refrigerator, and realizes the adjustment of open and close state through the output of torque, wherein, the transmission of torque usually needs to use gear transmission system to realize in the process of torque output. For this, when the user exists the abnormal situation such as violent operation to realize the control of open and close state, it can cause the damage of gear transmission system and even the motor connected with gear transmission system.

[0003] Based on the above situation, the torque limiter that can provide overload protection is usually arranged in the gear transmission system to avoid the generation of the above problem. The principle of torque limiter is that when the torque received exceeds the threshold value, the torque transmission route is cut off in the way of slipping, so as to protect the gear transmission system and motor from overload damage. When the torque received drops to the threshold range, the slipping phenomenon also ends, and the product resumes normal work

[0004] For this, for example, the announcement number CN204099538U discloses a gear structure and application has the transmission mechanism of this gear structure, and its adoption first gear and second gear are switched between the cooperation of the radially outward convex elastic body and the recess cavity to realize the switching of slipping and engagement state. This structure can meet the use demand of cutting off the torque transmission route in the way of slipping when the torque received exceeds the threshold value, but due to the overall elastic piece radially and outward convex, the overall structure radial dimension is large, it is difficult to meet the use demand of the application scene space limited condition such as intelligent closestool cover, if the radial dimension is reduced, it can not realize the effect of slipping.

[0005] For example, the announcement number CN214371241U discloses a slipping mechanism, which includes a driving gear and a driven gear that are used in conjunction, and the two are connected by a driving assembly. Specifically, the driving assembly includes an elastic piece and a rotating wheel. The elastic piece includes a flexible sheet, and the flexible sheet and the rotating wheel are adapted to each other to achieve slipping. The slipping is mainly achieved by the deformability of the elastic sheet. Since the elastic sheet is a thin product, it may lose elasticity due to long-term use, which may cause the elastic sheet and the rotating wheel to fail to cooperate, thereby shortening the service life of the overall slipping mechanism.

[0006] In view of the above, the torque limiter applied in the gear transmission system of the opening and closing component driving device in the prior art has problems, and further optimization of the structure is needed from the perspective of considering the stability of the use state and reducing the radial size to apply the application scenario space limited situation. Utility model content

[0007] The first object of the utility model is to provide a torque limiter to solve the technical problem of considering the stability of the use state and reducing the radial size to apply the application scenario space limited situation.

[0008] The second object of the utility model is to provide an opening and closing component driving device to solve the technical problem of improving the applicability of the application scenario space limited situation.

[0009] The torque limiter of the utility model is implemented as follows:

[0010] A torque limiter comprises:

[0011] A first gear comprises a toothed portion and an elastic portion adapted to be deformed by extrusion; the elastic portion is a cylindrical body extending along the axial direction of the toothed portion and to the side away from the toothed portion; the outer side wall of the elastic portion is provided with a clutch structure; and

[0012] A second gear comprises a gear body and a receiving cavity adapted for the elastic portion to be partially inserted in the gear body; and the cavity wall of the receiving cavity is provided with an engagement structure adapted to the clutch structure; wherein

[0013] The clutch structure comprises a slip portion and an annular matching portion arranged along the axial direction of the toothed portion;

[0014] The engagement structure comprises an engagement portion adapted to be concave-convex matched with the slip portion and an annular linking portion adapted to the annular matching portion, which are arranged along the axial direction of the gear body.

[0015] In the optional implementation of the utility model, the slip portion comprises at least two protrusions arranged on the outer side wall of the elastic portion at intervals in the circumferential direction; and

[0016] The engagement portion comprises at least two grooves arranged on the cavity wall of the receiving cavity at intervals in the circumferential direction;

[0017] The protrusions are adapted to slip with different grooves when the first gear produces a slip type rotary motion relative to the second gear.

[0018] In the optional implementation of the utility model, the at least two protrusions and the at least two grooves are one-to-one matched; or

[0019] The number of the grooves is more than the number of the protrusions.

[0020] In the optional implementation of the utility model, the elastic part is provided with at least one notch extending along the axial direction of the tooth-shaped part.

[0021] The notch is arranged in the annular matching part to make the annular matching part a circumferentially continuous and complete annular structure.

[0022] In the optional implementation of the utility model, one end of the elastic part in the axial direction is connected with the tooth-shaped part, the elastic part has a hollow cavity, and the end of the elastic part away from the tooth-shaped part in the axial direction is formed into an opening communicating with the hollow cavity.

[0023] The annular matching part is formed on the side wall of the elastic part close to the opening.

[0024] In the optional implementation of the utility model, the outer diameter of the elastic part is greater than the outer diameter of the tooth-shaped part.

[0025] The notch extends to the end of the elastic part connected with the tooth-shaped part in the axial direction; and

[0026] The protrusion and the notch are located in different radial planes.

[0027] In the optional implementation of the utility model, the torque limiter further comprises a support shaft for rotationally matching with the first gear and the second gear.

[0028] In the optional implementation of the utility model, the support shaft simultaneously penetrates the tooth-shaped part of the first gear and the gear body of the second gear; and

[0029] The elastic part is further provided with a connecting part coaxially arranged with the tooth-shaped part, and the connecting part, the elastic part and the tooth-shaped part are through the first shaft hole adapted to the support shaft.

[0030] In the optional implementation of the utility model, the accommodating cavity is provided with a columnar supporting part, and the columnar supporting part is provided with a second shaft hole adapted to the support shaft.

[0031] The opening and closing part driving device of the utility model is realized as follows:

[0032] An opening and closing part driving device comprises the torque limiter.

[0033] By adopting the above technical solution, this utility model has the following beneficial effects: The torque limiter and its opening / closing component drive device of this utility model, with the clutch and engagement structures provided between the first and second gears, ensure that the first and second gears maintain the same state within the torque threshold range through the engagement portion and the slippage portion. When the torque threshold range is exceeded, the transmission path can be cut off through the relative slippage between the engagement portion and the slippage portion, thus limiting the torque. Furthermore, both the clutch and engagement structures extend axially, thus meeting the requirements for the torque limiter while reducing the radial dimension. Based on the above, the engagement accuracy and reliability of the first and second gears are further improved by using an annular engagement portion and an annular connecting portion. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the torque limiter of this utility model;

[0035] Figure 2 This is an exploded structural diagram of the torque limiter of this utility model;

[0036] Figure 3 This is a cross-sectional view of the first gear of the torque limiter of this utility model in an optional embodiment;

[0037] Figure 4 This is a cross-sectional view of the first gear of the torque limiter of this utility model in another alternative embodiment;

[0038] Figure 5 This is a schematic diagram of the overall structure of the first gear of the torque limiter of this utility model;

[0039] Figure 6 This is a cross-sectional view of the first gear of the torque limiter of this utility model.

[0040] Figure 7 This is a schematic diagram of the overall structure of the second gear of the torque limiter of this utility model;

[0041] Figure 8 This is a cross-sectional view of the second gear of the torque limiter of this utility model.

[0042] Figure 9 This is a schematic diagram of the torque limiter of this utility model applied in the drive device of the opening and closing component.

[0043] Figure: the first gear 1, toothed portion 11, elastic portion 12, protrusion 13, arc surface 131, inclined surface 132, ring-shaped matching portion 14, notch 15, connecting portion 16, first shaft hole 17, second gear 2, gear body 21, accommodating cavity 22, groove 23, arc wall 231, inclined wall 232, ring-shaped connecting portion 24, columnar supporting portion 25, second shaft hole 26, supporting shaft 3, gear transmission system 5. DETAILED DESCRIPTION

[0044] In order to make the content of the utility model more easily be clearly understood, the following according to specific embodiment and combining with the drawings, the utility model is further explained in detail.

[0045] Example 1:

[0046] Please refer to Figures 1 to 8 As shown in the figure, the embodiment provides a torque limiter, which can be used in the opening and closing component driving device of the intelligent toilet, but is not limited to, to achieve the purpose of protecting the motor from burnout due to stall. Roughly, the torque limiter used in the embodiment includes a first gear 1 and a second gear 2 used in cooperation, when the torque limiter is applied in a specific opening and closing component driving device, it is mainly applied in the gear transmission system 5, and the first gear 1 is used to mesh with a certain gear in the gear transmission system 5, and the second gear 2 is used to mesh with another gear, so that when the torque does not exceed the threshold, the movement torque of a certain gear can be transmitted to another gear through the synchronous movement of the first gear 1 and the second gear 2, and when the torque exceeds the threshold, the transmission route of the gear transmission system 5 is cut off by the relative slipping between the first gear 1 and the second gear 2.

[0047] Specifically: the first gear 1 includes a toothed portion 11 and an elastic portion 12 connected with the toothed portion 11 and adapted to be deformed by extrusion; the elastic portion 12 is a cylindrical body extending along the axial direction of the toothed portion 11 and extending to the side away from the toothed portion 11; the outer side wall of the elastic portion 12 is provided with a clutch structure. The toothed portion 11 and the elastic portion 12 can be an integral piece formed by integral molding, or can be an assembled body formed by assembling the toothed portion 11 and the elastic portion 12 after separate machining.

[0048] The second gear 2 includes a gear body 21 and an accommodating cavity 22 provided in the gear body 21 and adapted to partially insert the elastic portion 12; and the cavity wall of the accommodating cavity 22 is provided with an engagement structure adapted to the clutch structure.

[0049] Roughly, the clutch structure includes a slipping portion arranged along the axial direction of the toothed portion 11 and a ring-shaped matching portion 14; the engagement structure includes an engagement portion adapted to be concave-convex matched with the slipping portion and a ring-shaped connecting portion 24 adapted to the ring-shaped matching portion 14, arranged along the axial direction of the gear body 21.

[0050] On the basis of the above structure, based on an optional implementation, the slipping part includes at least two protrusions 13 arranged on the outer side wall of the elastic part 12 in the circumferential direction; and the engaging part includes at least two grooves 23 arranged on the cavity wall of the accommodating cavity 22 in the circumferential direction. The protrusion 13 is adapted to slip with different grooves 23 when the first gear 1 produces a slipping rotation relative to the second gear 2.

[0051] Based on this structure, within the torque threshold range, each protrusion 13 is circumferentially limited by the corresponding groove 23, so that the protrusion 13 cannot normally escape from the groove 23 within the torque threshold range, thereby achieving the same state of the first gear 1 and the second gear 2, which can be synchronous rotation or synchronous static; when the torque threshold is exceeded, the elastic part 12 will be elastically deformed, and the protrusion 13 will gradually slip out of the originally fitted groove 23, so that the first gear 1 and the second gear 2 produce relative rotation, and the protrusion 13 enters the next groove 23, so that the protrusion 13 continuously switches the cooperating groove 23 in the circumferential direction, realizing the relative slipping of the first gear 1 and the second gear 2. It should be noted that in theory, the grooves 23 can be provided on the slipping part, and the protrusions 13 can be provided on the engaging part, and this embodiment is not absolutely limited.

[0052] It is necessary to further explain the protrusion 13 and the groove 23 used in this embodiment. In order to cooperate smoothly when the protrusion 13 and the groove 23 need to be relatively slipped, the wall surface of the protrusion 13 away from the outer side wall of the elastic part 12 is an arc surface 131, and the two side ends of the arc surface 131 in the circumferential direction are connected to the outer side wall of the elastic part 12 through inclined surfaces 132; correspondingly, the groove 23 includes an arc wall 231 adapted to the arc surface 131 of the protrusion 13 and a pair of inclined walls 232 arranged on the two side ends of the arc wall 231 in the circumferential direction, each inclined wall 232 being adapted to the inclined surface 132 of the protrusion 13. Under this structure, when the protrusion 13 and the groove 23 are relatively slipped, the inclined surface 132 of the protrusion 13 slides along the inclined wall 232 of the groove 23, so that the protrusion 13 can smoothly gradually escape from the groove 23. Similarly, when the protrusion 13 needs to enter the groove 23, the protrusion 13 is also more easily entered into the groove 23 through the cooperation of the inclined surface 132 of the protrusion 13 and the inclined wall 232 of the groove 23, thereby realizing the insertion and separation of the protrusion 13 and different grooves 23, to meet the use requirements of the relative slipping of the first gear 1 and the second gear 2.

[0053] Based on the above, it should be noted that in an alternative embodiment, at least two protrusions 13 are matched with at least two grooves 23 one by one, that is, the number of protrusions 13 is the same as the number of grooves 23, at this time, when the first gear 1 and the second gear 2 are in the same state, each groove 23 corresponds to a protrusion 13 embedded in it. In another alternative embodiment, the number of grooves 23 is greater than the number of protrusions 13, at this time, when the first gear 1 and the second gear 2 are in the same state, part of the grooves 23 are empty without protrusions 13 embedded, and when the first gear 1 produces a slipping rotation relative to the second gear 2, the protrusions 13 slip with different grooves 23.

[0054] In addition, in order to improve the smoothness of the elastic deformation of the elastic part 12, the present embodiment can further provide at least one notch 15 extending along the axial direction of the toothed part 11 on the elastic part 12, so that the elastic part 12 is no longer a complete cylindrical body, thereby being more easily elastically deformed.

[0055] Based on the above structure, it should be noted that the notch 15 avoids the annular matching part 14 so that the annular matching part 14 is a circumferentially continuous and complete annular structure. More specifically, in an alternative embodiment, the axial end of the elastic part 12 is connected to the toothed part 11, the elastic part 12 has a hollow cavity, and the axial end of the elastic part 12 away from the toothed part 11 is formed as an opening communicating with the hollow cavity; the annular matching part 14 is formed on the side wall of the elastic part 12 adjacent to the opening. Here, the annular matching part 14 cooperates with the annular connecting part 24 to improve the matching accuracy and reliability of the first gear 1 and the second gear 2.

[0056] In addition, in theory, the outer diameter of the elastic part 12 and the outer diameter of the toothed part 11 can meet the use requirements of the present embodiment regardless of the situation, that is, the outer diameter of the elastic part 12 can be less than, equal to, or greater than the outer diameter of the toothed part 11. The present embodiment only takes the case where the outer diameter of the elastic part 12 is greater than the outer diameter of the toothed part 11 as an example in combination with the drawings, in which case the notch 15 can extend to the axial end of the elastic part 12 connected to the toothed part 11; in this way, for each notch 15 extending in the axial direction, the deformation of the elastic part 12 can be better assisted.

[0057] Based on the above structure, it should be noted that the present embodiment also provides the protrusions 13 and the notches 15 on different radial planes. In a preferred embodiment, the protrusions 13 are uniformly distributed in the circumferential direction on the outer side wall of the elastic part 12, and similarly, the notches 15 are also uniformly distributed in the circumferential direction, and the protrusions 13 and the notches 15 are arranged one by one in an alternating manner, that is, there is one notch 15 between every two adjacent protrusions 13 in the circumferential direction.

[0058] In addition, the torque limiter needs to be reliably assembled in use to ensure smooth operation, and the torque limiter of the embodiment further comprises a support shaft 3 arranged in rotation with the first gear 1 and the second gear 2.

[0059] In more detail, the support shaft 3 penetrates the toothed portion 11 of the first gear 1 and the gear body 21 of the second gear 2, and the elastic portion 12 is further provided with an adapter portion 16 coaxially arranged with the toothed portion 11, and the adapter portion 16, the elastic portion 12 and the toothed portion 11 are through the first shaft hole 17 matched with the support shaft 3. The cylindrical supporting portion 25 is provided with the second shaft hole 26 matched with the support shaft 3.

[0060] The torque limiter of the utility model is realized as follows: the clutch structure and the engagement structure arranged between the first gear 1 and the second gear 2 are arranged to make the first gear 1 and the second gear 2 keep the same state within the torque threshold range through the engagement portion and the slipping portion, and when the torque threshold range is exceeded, the transmission route can be cut off through the relative slipping between the engagement portion and the slipping portion, thereby limiting the torque.

[0061] Embodiment 2:

[0062] Please refer to Figures 1 to 9 On the basis of the torque limiter of embodiment 1, the embodiment provides an opening and closing component driving device, which comprises the torque limiter of embodiment 1, and the torque limiter is mainly applied to the gear transmission system 5 of the opening and closing component driving device.

[0063] The above specific embodiments further illustrate the purpose, technical scheme and beneficial effects of the utility model, and it should be understood that the above is only a specific embodiment of the utility model and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

[0064] In the description of the utility model, it should be understood that the terms indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only used to facilitate the description of the utility model and simplify the description, and cannot be understood as a limitation on the utility model.

[0065] In the utility model, unless another definite provision and limitation, the term " install " " link " " connect " " fixed " and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection;Can be directly connected, also can pass through intermediate medium indirectly connect, can be two element inside's intercommunication or two element's mutual action relation. For ordinary skilled person in the art, can understand the specific meaning of above -mentioned term in the utility model according to specific circumstances.

Claims

1. A torque limiter characterized by, The torque limiter comprises: a first gear comprising a toothed portion and an elastic portion adapted to be deformed by extrusion; the elastic portion is a cylindrical body extending along the axial direction of the toothed portion and away from the toothed portion; an engagement structure is arranged on the outer wall of the elastic portion; and a second gear comprising a gear body and a receiving cavity adapted for the elastic portion to be partially inserted into the receiving cavity; and an engagement structure is arranged on the cavity wall of the receiving cavity and adapted to the engagement structure. The engagement structure comprises a slip portion and a ring-shaped matching portion arranged along the axial direction of the toothed portion. The engagement structure comprises an engagement portion adapted to be concave-convex matched with the slip portion and a ring-shaped linking portion adapted to the ring-shaped matching portion.

2. The torque limiter of claim 1, wherein The slip portion comprises at least two protrusions arranged on the outer wall of the elastic portion in the circumferential direction; and The engagement portion comprises at least two grooves arranged on the cavity wall of the receiving cavity in the circumferential direction. The protrusions are adapted to slip with different grooves when the first gear produces a slip rotation relative to the second gear.

3. The torque limiter of claim 2, wherein, The at least two protrusions and the at least two grooves are one-to-one matched; or The number of the grooves is greater than the number of the protrusions.

4. The torque limiter of claim 2 or 3, wherein At least one notch extending along the axial direction of the toothed portion is arranged on the elastic portion; and The notch avoids the ring-shaped matching portion so that the ring-shaped matching portion is a circumferentially continuous and complete ring structure.

5. The torque limiter of claim 4, wherein, The axial end of the elastic portion connected with the toothed portion has a hollow cavity, and the axial end of the elastic portion away from the toothed portion is formed as an opening communicating with the hollow cavity. The ring-shaped matching portion is formed on the side wall of the elastic portion close to the opening.

6. The torque limiter of claim 5, wherein, The outer diameter of the elastic portion is greater than the outer diameter of the toothed portion. The notch extends to the axial end of the elastic portion connected with the toothed portion; and The protrusions and the notch are located in different radial planes.

7. The torque limiter of claim 1, wherein The torque limiter further comprises a support shaft for rotationally matching with the first gear and the second gear.

8. The torque limiter of claim 7, wherein, The support shaft simultaneously penetrates the toothed portion of the first gear and the gear body of the second gear; and The elastic portion further comprises a linking portion coaxially arranged with the toothed portion, and a first shaft hole adapted to the support shaft is formed through the linking portion, the elastic portion and the toothed portion.

9. The torque limiter of claim 7 or 8, wherein A columnar supporting portion adapted to the support shaft is arranged in the receiving cavity.

10. An opening and closing member driving device characterized by comprising: The torque limiter comprises: The torque limiter comprises the torque limiter according to any one of claims 1 to 9.

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