Connection conveying line

Abstract

The utility model discloses a connection conveying line. The connection conveying line comprises a support, a first connection table, a second connection table and a locking mechanism. The first end of the first connection table is hinged to one side of the support, and a first conveying mechanism is arranged between the first end and the second end of the first connection table; the fourth end of the second connection table is hinged to the other side of the support, and a second conveying mechanism is arranged between the third end and the fourth end of the second connection table. The locking mechanism comprises a first locking assembly, the first locking assembly comprises a first locking piece and a second locking piece which can be mutually locked or unlocked, the first locking piece is arranged at the second end of the first connection table, and the second locking piece is arranged at the third end of the second connection table. According to the connection conveying line, connection between a production line and equipment can be achieved, and transportation of heavy products can be achieved.

Description

Technical Field

[0001] This application relates to the technical field of transfer tables, and particularly to a transfer conveyor line. Background Art

[0002] In the related art, as the connection between the production line and the equipment, the transfer table can replace manual labor during product production, overcoming the disadvantages of slow product transfer speed by personnel and high labor costs, and automatically transferring products through a belt line instead of manual transfer. However, the existing transfer tables also have certain defects. Due to the folding structure of the transfer table, there are certain transmission limitations, and heavy objects and large products cannot be transported. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, this application provides a transfer conveyor line, which can realize the connection between the production line and the equipment and can transport heavier products.

[0004] The transfer conveyor line according to an embodiment of the utility model includes: a bracket, a first transfer table, a second transfer table, and a locking mechanism; the first end of the first transfer table is hinged to one side of the bracket, and a first conveying mechanism is provided between the first end and the second end of the first transfer table; the fourth end of the second transfer table is hinged to the other side of the bracket, and a second conveying mechanism is provided between the third end and the fourth end of the second transfer table; the locking mechanism includes a first locking assembly, and the first locking assembly includes a first locking member and a second locking member that can be locked or unlocked with each other. The first locking member is provided at the second end of the first transfer table, and the second locking member is provided at the third end of the second transfer table; wherein, when the first locking member and the second locking member are locked, the output end of the first conveying mechanism is located at the input end of the second conveying mechanism and is used to cooperate with the second conveying mechanism to convey products in sequence.

[0005] According to the connecting and conveying line of the embodiment of the present utility model, it has at least the following beneficial effects: This connecting and conveying line includes a bracket, a first connecting table, a second connecting table, and a locking mechanism; the first end of the first connecting table is hinged to one side of the bracket, and the fourth end of the second connecting table is hinged to the other side of the bracket. Thus, when aligning the second end of the first connecting table and the third end of the second connecting table, the first locking member at the second end and the second locking member at the third end can be locked, thereby realizing the connection and locking between the first connecting table and the second connecting table. Furthermore, the first conveying mechanism on the first connecting table and the second conveying mechanism on the second connecting table can sequentially convey products, thereby realizing the automatic conveying between the production line and the equipment. And due to the locking of the locking mechanism, the connection strength between the first connecting table and the second connecting table can be improved, so that the transportation of heavy objects can be realized. When the locking mechanism is unlocked, the disconnection and folding between the first connecting table and the second connecting table can be realized, thus saving space and facilitating the passage of vehicles or people at the position of the connecting and conveying line; Therefore, the connecting and conveying line of the present application can realize the connection between the production line and the equipment and can realize the transportation of heavier products.

[0006] According to some embodiments of the present utility model, it further includes a connection assembly, which includes a first connection group and a second connection group. The first connection group is telescopically hinged to the second end of the first connecting table and one side of the bracket, and the second connection group is telescopically hinged to the third end of the second connecting table and the other side of the bracket.

[0007] According to some embodiments of the present utility model, both the first connection group and the second connection group are gas springs.

[0008] According to some embodiments of the present utility model, the locking mechanism further includes a second locking assembly and a third locking assembly. The second locking assembly is connected to and used for locking the first end of the first connecting table and the bracket, and the third locking assembly is connected to and used for locking the fourth end of the second connecting table and the bracket.

[0009] According to some embodiments of the present utility model, the second locking assembly includes a first limiting plate and a first locking member. The first limiting plate is connected to the first end of the first connecting table and is used for limiting the rotation angle of the first connecting table. The first limiting plate and the bracket can be fixedly connected through the first locking member. The third locking assembly includes a second limiting plate and a second locking member. The second limiting plate is connected to the fourth end of the second connecting table and is used for limiting the rotation angle of the second connecting table. The second limiting plate and the bracket can be fixedly connected through the second locking member.

[0010] According to some embodiments of the present utility model, it further includes an induction assembly. The induction assembly includes a first induction member, and the first induction member is arranged at the second end of the first connecting table or the third end of the second connecting table and is used for sensing that the first locking assembly is in a locked state.

[0011] According to some embodiments of the present utility model, the induction component further includes a second induction member and a third induction member. The second induction member and the third induction member are sequentially arranged on the conveying path of the second conveying mechanism and are used to sense the product to confirm the input time of the next product.

[0012] According to some embodiments of the present utility model, it further includes a first roller assembly and a second roller assembly. The first roller assembly is arranged on one side of the bracket and is close to the input end of the first conveying mechanism. The second roller assembly is arranged on the other side of the bracket and is close to the output end of the second conveying mechanism.

[0013] According to some embodiments of the present utility model, both the first conveying mechanism and the second conveying mechanism include a first conveying component and a second conveying component arranged in parallel, and the distance between the first conveying component and the second conveying component is adjustable.

[0014] According to some embodiments of the present utility model, it further includes a workbench. The workbench includes a first workbench arranged on the first docking station and a second workbench arranged on the second docking station. The first workbench is parallel to the conveying surface of the first conveying mechanism, and the second workbench is parallel to the conveying surface of the second conveying mechanism.

[0015] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0017] Figure 1 is a schematic diagram of the overall structure of one embodiment of the docking and conveying line of the present utility model;

[0018] Figure 2 is Figure 1 a schematic diagram of the structure of the second perspective of the docking and conveying line shown in ;

[0019] Figure 3 is Figure 1 a schematic diagram of the structure of the third perspective of the docking and conveying line shown in ;

[0020] Figure 4 is Figure 1 a schematic diagram of the structure of the fourth perspective of the docking and conveying line shown in.

[0021] Reference numerals:

[0022] Bracket 100; first hinge 110; second hinge 120; first docking station 200; first end 201; second end 202; first conveying mechanism 210; first workbench 220; second docking station 300; third end 301; fourth end 302; second conveying mechanism 310; second workbench 320; first locking assembly 410; first locking member 411; second locking member 412; first limiting plate 421; second limiting plate 431; first connecting group 510; second connecting group 520; sensing assembly 600; first sensing member 610; second sensing member 620; third sensing member 630; alarm 640; first roller assembly 710; second roller assembly 720. DETAILED DESCRIPTION

[0023] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0024] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0025] In the description of this application, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0026] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0027] In the description of the present application, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0028] The following refers to Figures 1 to 4 Describe the connecting and conveying line of the embodiment of the present utility model.

[0029] As Figures 1 to 3 shown, the connecting and conveying line according to the embodiment of the present utility model includes: a bracket 100, a first connecting table 200, a second connecting table 300, and a locking mechanism; the first end 201 of the first connecting table 200 is hinged to one side of the bracket 100, and a first conveying mechanism 210 is provided between the first end 201 and the second end 202 of the first connecting table 200; the fourth end 302 of the second connecting table 300 is hinged to the other side of the bracket 100, and a second conveying mechanism 310 is provided between the third end 301 and the fourth end of the second connecting table 300; the locking mechanism includes a first locking assembly 410, and the first locking assembly 410 includes a first locking member 411 and a second locking member 412 that can be locked or unlocked with each other. The first locking member 411 is provided at the second end 202 of the first connecting table 200, and the second locking member 412 is provided at the third end 301 of the second connecting table 300; wherein, when the first locking member 411 and the second locking member 412 are locked, the output end of the first conveying mechanism 210 is located at the input end of the second conveying mechanism 310 and is used to cooperate with the second conveying mechanism 310 to sequentially convey products.

[0030] It can be understood that this connection and conveying line includes a bracket 100, a first connection table 200, a second connection table 300, and a locking mechanism; the first end 201 of the first connection table 200 is hinged to one side of the bracket 100, and the fourth end 302 of the second connection table 300 is hinged to the other side of the bracket 100. Thus, when aligning the second end 202 of the first connection table 200 and the third end 301 of the second connection table 300, the first locking member 411 at the second end 202 and the second locking member 412 at the third end 301 can be locked, thereby realizing the connection and locking between the first connection table 200 and the second connection table 300. Furthermore, the first conveying mechanism 210 located on the first connection table 200 and the second conveying mechanism 310 on the second connection table 300 can convey products in sequence, thereby realizing automatic conveyance between the production line and the equipment. And due to the locking of the locking mechanism, the connection strength between the first connection table 200 and the second connection table 300 can be improved, so that the transportation of heavy objects can be realized. When the locking mechanism is unlocked, the disconnection and folding between the first connection table 200 and the second connection table 300 can be realized, thus saving space and facilitating the passage of vehicles or people at the position of the connection and conveying line. Therefore, the connection and conveying line of the present application can realize the connection between the production line and the equipment and can realize the transportation of heavier products.

[0031] It should be understood that the first hinge point 110 of the first connection table 200 is located at the first end 201 of the first connection table 200 and one side of the bracket 100, and the second hinge point 120 of the second connection table 300 is located at the fourth end 302 of the second connection table 300 and the other side of the bracket 100.

[0032] It can be understood that a connection component is further included, including a first connection group 510 and a second connection group 520. The first connection group 510 is telescopically hinged to the second end 202 of the first connection table 200 and one side of the bracket 100, and the second connection group 520 is telescopically hinged to the third end 301 of the second connection table 300 and the other side of the bracket 100. For example, as Figures 1 to 2 shown, in this embodiment, this connection and conveying line further includes a connection component. The connection component includes a first connection group 510 and a second connection group 520 and both are telescopic. The two ends of the first connection group 510 are respectively hinged to the second end 202 of the first connection table 200 and one side of the bracket 100. Thus, by the telescoping of the first connection group 510, the second end 202 of the first connection table 200 can be rotated around the first end 201. The two ends of the second connection group 520 are respectively hinged to the third end 301 of the second connection table 300 and the other side of the bracket 100. Thus, by the telescoping of the second connection group 520, the third end 301 of the second connection table 300 can be rotated around the fourth end 302.

[0033] It can be understood that both the first connection group 510 and the second connection group 520 are gas springs. For example, as Figures 1 to 2 shown, in this embodiment, both the first connection group 510 and the second connection group 520 are gas springs. Therefore, the second end 202 of the first docking station 200 and the third end 301 of the second docking station 300 can be rotated under an external force, the gas springs expand and contract, and after removing the external force, the first docking station 200 and the second docking station 300 can remain in a stopped state, so that the folding or opening of the first docking station 200 and the second docking station 300 can be realized.

[0034] It should be understood that in addition to being gas springs, the first connection group 510 and the second connection group 520 can also be telescopic driving members such as cylinders. When the output end of the cylinder contracts, the first docking station 200 and the second docking station 300 are folded and stored. When the output end of the cylinder extends, the first docking station 200 and the second docking station 300 are opened and the product is conveyed in sequence.

[0035] It can be understood that the locking mechanism further includes a second locking component and a third locking component. The second locking component is connected to and used to lock the first end 201 of the first docking station 200 and the bracket 100, and the third locking component is connected to and used to lock the fourth end 302 of the second docking station 300 and the bracket 100. For example, as Figure 3 shown, in this embodiment, the locking mechanism further includes a second locking component for locking the first docking station 200 and the bracket 100, and a third locking component for locking the second docking station 300 and the bracket 100. The second locking component can be used to connect and lock the first end 201 of the first docking station 200 and one side of the bracket 100, and the third locking component can be used to connect and lock the fourth end 302 of the second docking station 300 and the other side of the bracket 100. Therefore, on the basis of the first locking component 410, adding the second locking component and the third locking component can further improve the locking effect after the connection of the first docking station 200 and the second docking station 300, thereby improving the bearing capacity of the first docking station 200 and the second docking station 300.

[0036] It can be understood that the second locking component includes a first limiting plate 421 and a first locking member. The first limiting plate 421 is connected to the first end 201 of the first docking station 200 and is used to limit the rotation angle of the first docking station 200. The first limiting plate 421 and the bracket 100 can be fixedly connected by the first locking member. The third locking component includes a second limiting plate 431 and a second locking member. The second limiting plate 431 is connected to the fourth end 302 of the second docking station 300 and is used to limit the rotation angle of the second docking station 300. The second limiting plate 431 and the bracket 100 can be fixedly connected by the second locking member. For example, as Figure 3As shown, in this embodiment, the second locking assembly includes a first limiting plate 421 and a first locking member. The first limiting plate 421 is provided at the first end 201 of the first docking station 200, and when the first docking station 200 rotates to the horizontal position, the first limiting plate 421 abuts against one side of the bracket 100, thereby restricting further rotation of the first docking station 200. After the first docking station 200 rotates to the horizontal position, the first limiting plate 421 is locked to one side of the bracket 100 by the first locking member; similarly, the third locking assembly includes a second limiting plate 431 and a second locking member. The second limiting plate 431 is provided at the fourth end 302 of the second docking station 300, and can rotate to the horizontal position along with the second docking station 300. The second limiting plate 431 abuts against the other side of the bracket 100, thereby restricting further rotation of the second docking station 300. After the second docking station 300 rotates to the horizontal position, the second limiting plate 431 is locked to the other side of the bracket 100 by the second locking member. Specifically, threaded holes are correspondingly provided on one side of the first limiting plate 421 and the bracket 100, and threaded holes are also correspondingly provided on the other side of the second limiting plate 431 and the bracket 100.

[0037] It should be understood that in this embodiment, by rotating the second end 202 of the first docking station 200 downward and rotating the third end 301 of the second docking station 300 downward, the folding and storage of the first docking station 200 and the second docking station 300 are realized. At this time, the space between the two sides of the bracket 100 can allow workers or carts to pass through.

[0038] It can be understood that an induction assembly 600 is further included. The induction assembly 600 includes a first induction member 610. The first induction member 610 is provided at the second end 202 of the first docking station 200 or the third end 301 of the second docking station 300, and is used to sense that the first locking assembly is in the locked state. For example, as Figure 3 shown, in this embodiment, such a docking and conveying line further includes an induction assembly 600. The induction assembly 600 includes a first induction member 610 for sensing the locked state of the first locking assembly. The first induction member 610 can be provided at the second end 202 of the first docking station 200 or the third end 301 of the second docking station 300, as long as it can sense the locking state of the first locking assembly.

[0039] It can be understood that the induction assembly 600 further includes a second induction member 620 and a third induction member 630. The second induction member 620 and the third induction member 630 are sequentially provided on the conveying path of the second conveying mechanism 310, and are used to sense the product to confirm the input time of the next product. For example, as Figures 3 to 4As shown, in this embodiment, the induction component 600 further includes a second induction element 620 and a third induction element 630 provided on the second docking station 300. The second induction element 620 and the third induction element 630 are sequentially arranged on the conveying path of the second conveying mechanism 310. Thus, when the product is conveyed from the first conveying mechanism 210 to the second conveying mechanism 310, the product will sequentially pass through the second induction element 620 and the third induction element 630. When the third induction element 630 just senses the product while the second induction element 620 does not sense the product, a corresponding signal will be transmitted to the control system at this time, so that the control system can control the corresponding mechanism to put the next product onto the docking conveying line. In this way, the timing of putting the next product can be controlled, thereby effectively controlling the distance between adjacent products.

[0040] It should be understood that the bracket 100 is also provided with an alarm 640. The alarm 640 is electrically connected to the first induction element 610, the second induction element 620, and the third induction element 630 respectively. When the first induction element 610 senses that the first locking member 411 and the second locking member 412 are not locked, an alarm will be issued to warn that products cannot be conveyed onto the docking conveying line at this time; when the second induction element 620 does not sense the product while the third induction element 630 just senses the product, the alarm 640 issues an alarm, indicating that the next product can be put into the docking conveying line at this time.

[0041] Specifically, in this embodiment, the first locking member 411 is a socket for a plug pin provided at the second end 202 of the first docking station 200, and the second locking member 412 is a plug pin provided at the third end 301 of the second docking station 300. When both the first docking station 200 and the second docking station 300 are rotated to the horizontal position, the plug pin is pushed so that the plug pin is inserted into the plug hole of the socket for the plug pin, thereby realizing the connection and locking of the first docking station 200 and the second docking station 300.

[0042] It can be understood that a first roller assembly 710 and a second roller assembly 720 are further included. The first roller assembly 710 is provided on one side of the bracket 100 and is arranged close to the input end of the first conveying mechanism 210. The second roller assembly 720 is provided on the other side of the bracket 100 and is arranged close to the output end of the second conveying mechanism 310. For example, Figures 1 to 4As shown, in this embodiment, it further includes a first roller assembly 710 disposed near the input end of the first conveying mechanism 210 and a second roller assembly 720 disposed at the output end of the second conveying mechanism 310. Thus, the product can first pass through the first roller assembly 710 from the previous production line and then be conveyed to the first conveying mechanism 210, and then pass through the second roller assembly 720 by the second conveying mechanism 310 and be conveyed to the next device. The first roller assembly 710 is disposed on one side of the bracket 100 and is located on the side of the first conveying mechanism 210 away from the second conveying mechanism 310. The second roller assembly 720 is disposed on the other side of the bracket 100 and is located on the side of the second conveying mechanism 310 away from the first conveying mechanism 210. Thus, the first roller assembly 710 and the second roller assembly 720 can achieve a good transition, preventing the product from getting stuck due to dropping during the process of being transported from the previous production line to the connecting conveying line, or during the process of being transported from the connecting conveying line to the next device.

[0043] It can be understood that both the first conveying mechanism 210 and the second conveying mechanism 310 include a first conveying component and a second conveying component arranged in parallel, and the distance between the first conveying component and the second conveying component is adjustable. For example, as Figures 3 to 4 shown, in this embodiment, the first conveying component and the second conveying component of the first conveying mechanism 210 can respectively carry and convey both sides of the product, and the first conveying component and the second conveying component of the second conveying mechanism 310 can respectively carry and convey both sides of the product. By adjusting the distance between the first conveying component and the second conveying component, products with different width dimensions can be adapted, thereby improving the versatility of the connecting conveying line.

[0044] It can be understood that it further includes a workbench, and the workbench includes a first workbench 220 disposed on the first connecting table 200 and a second workbench 320 disposed on the second connecting table 300. The first workbench 220 is parallel to the conveying surface of the first conveying mechanism 210, and the second workbench 320 is parallel to the conveying surface of the second conveying mechanism 310. For example, as Figures 2 to 3 shown, in this embodiment, the first connecting table 200 is provided with a first workbench 220, and the first workbench 220 is parallel to the conveying surface of the first conveying mechanism 210. The second connecting table 300 is provided with a second workbench 320, and the second workbench 320 is parallel to the conveying surface of the second conveying mechanism 310. Therefore, when the conveying surfaces of the first conveying mechanism 210 and the second conveying mechanism 310 are both adjusted to be horizontal, the first workbench 220 and the second workbench 320 are also horizontal, so that products can be placed. For example, defective products or products that can be temporarily placed on the workbench due to front-end equipment failures.

[0045] The embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the scope of knowledge possessed by those of ordinary skill in the art. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. Connecting conveyor line, characterized in that, Comprising: Bracket; The first transfer table, the first end of the first transfer table is hinged to one side of the bracket, and a first conveying mechanism is provided between the first end and the second end of the first transfer table; The second transfer table, the fourth end of the second transfer table is hinged to the other side of the bracket, and a second conveying mechanism is provided between the third end and the fourth end of the second transfer table; The locking mechanism includes a first locking component, and the first locking component includes a first locking member and a second locking member that can be locked or unlocked with each other. The first locking member is provided at the second end of the first transfer table, and the second locking member is provided at the third end of the second transfer table; wherein, when the first locking member and the second locking member are locked, the output end of the first conveying mechanism is located at the input end of the second conveying mechanism and is used to cooperate with the second conveying mechanism to convey products in sequence.

2. The connecting conveyor line according to claim 1, characterized in that, It further includes a connecting component, including a first connecting group and a second connecting group. The first connecting group is telescopically hinged to the second end of the first transfer table and one side of the bracket, and the second connecting group is telescopically hinged to the third end of the second transfer table and the other side of the bracket.

3. The connecting conveyor line according to claim 2, wherein Both the first connecting group and the second connecting group are gas springs.

4. The connecting and conveying line according to claim 1, wherein The locking mechanism further includes a second locking component and a third locking component. The second locking component is used to connect and lock the first end of the first transfer table and the bracket, and the third locking component is used to connect and lock the fourth end of the second transfer table and the bracket.

5. The connecting conveyor line according to claim 4, wherein The second locking component includes a first limiting plate and a first locking member. The first limiting plate is connected to the first end of the first transfer table and is used to limit the rotation angle of the first transfer table. The first limiting plate and the bracket can be fixedly connected through the first locking member. The third locking component includes a second limiting plate and a second locking member. The second limiting plate is connected to the fourth end of the second transfer table and is used to limit the rotation angle of the second transfer table. The second limiting plate and the bracket can be fixedly connected through the second locking member.

6. The connecting conveyor line according to claim 1, wherein, It further includes an induction component, and the induction component includes a first induction member. The first induction member is provided at the second end of the first transfer table or the third end of the second transfer table and is used to sense that the first locking component is in a locked state.

7. The connecting conveyor line according to claim 6, characterized in that, The induction component further includes a second induction member and a third induction member. The second induction member and the third induction member are sequentially arranged on the conveying path of the second conveying mechanism and are used to sense the product to confirm the input time of the next product.

8. The connecting conveyor line according to claim 1, characterized in that, It further includes a first roller assembly and a second roller assembly. The first roller assembly is provided on one side of the bracket and is arranged close to the input end of the first conveying mechanism. The second roller assembly is provided on the other side of the bracket and is arranged close to the output end of the second conveying mechanism.

9. The connecting conveyor line according to claim 8, characterized in that, Both the first conveying mechanism and the second conveying mechanism include a first conveying component and a second conveying component arranged in parallel, and the distance between the first conveying component and the second conveying component is adjustable.

10. The connecting conveyor line according to claim 1, characterized in that, It also includes a workbench, which includes a first workbench arranged on the first docking station and a second workbench arranged on the second docking station. The first workbench is parallel to the conveying surface of the first conveying mechanism, and the second workbench is parallel to the conveying surface of the second conveying mechanism.

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