Rotary locking device for rotary lifting base of welfare seat

Abstract

The utility model discloses a rotary locking device for a rotary lifting base of a welfare seat, and belongs to the technical field of rotary lifting bases of welfare seats. According to the rotary locking structure, through cooperation of the linkage plate and the locking plate, when the rack moves in a reciprocating mode, the pressing shaft on the linkage plate presses the movable opening, the locking opening in one side of the locking plate can be connected with the locking stop shaft in a clamped mode when the rotary plate resets, the locking opening leaves the locking stop shaft when the rotary plate rotates out, and locking after the rotary plate resets is achieved; the stability of the rotating plate during rotation is guaranteed, the stability of the welfare seat during movement is improved, and the wheelchair accessible seat is scientific and reasonable in structural design, convenient to control and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of rotating and lifting bases for welfare seats, and particularly relates to a rotation locking device for a rotating and lifting base of a welfare seat. Background Technique

[0002] Welfare seats are mainly applied to commercial vehicles, and their bases have the functions of rotation and lifting, enabling the welfare seats to cooperate with wheelchairs, facilitating the getting on and off of some special groups such as the elderly and disabled people, and avoiding the problem of manually carrying wheelchairs. The rotation of the welfare seat is mainly completed by the cooperation of a rotating plate on the base and a fixed middle plate. However, the existing welfare seats cannot be locked after rotation reset, that is, there is a lack of a structure for locking and fixing the rotating plate, resulting in poor rotation stability.

[0003] Therefore, we designed and developed a rotation locking device for welfare seats. By designing a locking hook that can be linked with the rotating rack, the locking of the rotating plate can be easily achieved. Its structure is simple, the design is scientific and reasonable, and the rotation stability of the welfare seat is effectively improved. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a rotation locking device for a rotating and lifting base of a welfare seat, so as to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution:

[0006] A rotation locking device for a rotating and lifting base of a welfare seat, including a fixed middle plate. The upper side of the fixed middle plate is rotatably connected with a rotating plate through a slewing bearing. The lower end of the rotating plate is rotatably connected with a rotating rack. A driving structure for driving the rotation of the rotating rack is arranged on the fixed middle plate. A linkage plate is fixedly connected to the rotating rack. A locking plate is rotatably arranged on the lower side of the rotating plate. A tension spring is arranged on one side of the locking plate. One end of the tension spring is connected to the rotating plate. A locking port is arranged on the other side of the locking plate. A locking stop shaft that can be clamped in the locking port is arranged on the upper side of the fixed middle plate. A pressing shaft is fixedly arranged on the linkage plate. An activity port is opened on the locking plate. The pressing shaft is movably arranged in the activity port.

[0007] As a further preferred solution of the utility model: The driving structure includes a rotation driving motor fixedly arranged on the fixed middle plate. The output end of the rotation driving motor is connected with a driving gear, and the driving gear meshes with the rotating rack.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] The rotation locking structure, through the cooperation of the linkage plate and the locking plate, when the rack reciprocates, by the pressing shaft on the linkage plate pressing on the movable opening, the locking opening on one side of the locking plate can be engaged with the locking stop shaft when the rotating plate is reset, and the locking opening leaves the locking stop shaft when the rotating plate rotates out, realizing the locking of the rotating plate after reset, ensuring the stability of the rotating plate during rotation, improving the stability of the welfare seat during movement, with a scientific and reasonable structural design, convenient operation and strong practicability. Brief Description of the Drawings

[0010] Figure 1 It is a schematic diagram of the structural cooperation when the rotating plate of the present invention is locked;

[0011] Figure 2 It is a schematic diagram of the structural cooperation when the rotating plate of the present invention rotates;

[0012] Figure 3 It is a schematic diagram of the bottom structure when the present invention is applied to the seat base;

[0013] Figure 4 It is a schematic diagram of the bottom structure when the fixed middle plate is omitted when the present invention is applied to the seat base;

[0014] Figure 5 It is a schematic diagram of the structure when the rotating plate is omitted in the present invention.

[0015] In the figure: 1, fixed middle plate; 2, rotating plate; 3, slewing bearing; 4, rotating rack; 5, rotating drive motor; 6, drive gear; 7, linkage plate; 8, locking stop shaft; 9, locking opening; 10, pressing shaft; 11, movable opening; 12, rotating shaft; 13, tension spring; 14, locking plate; 15, base body. Detailed Description of the Embodiments

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention. Embodiment 1

[0017] Please refer to Figures 1-5 , this embodiment provides a rotation locking device for a welfare seat rotation and lifting base, including a fixed middle plate 1, and a rotating plate 2 is rotatably connected to the upper side of the fixed middle plate 1 through a slewing bearing 3, as Figure 3 , Figure 4As shown in the figure, when the fixed middle plate 1 and the rotating plate 2 are actually used, they are both arranged on the base body 15 of the welfare seat. A rotating rack 4 is rotatably connected to the lower end of the rotating plate 2, and a driving structure for driving the rotating rack 4 to rotate is arranged on the fixed middle plate 1. Specifically, the driving structure includes a rotating drive motor 5 fixedly arranged on the fixed middle plate 1. The output end of the rotating drive motor 5 is connected with a driving gear 6, and the driving gear 6 meshes with the rotating rack 4. The above structure is a conventional design familiar to those skilled in the art in the field of this welfare seat. Special teeth are arranged on the rotating rack 4 near the driving gear 6, such as Figure 2 As shown in the figure, when the driving gear 6 rotates and the special teeth on the rotating rack 4 mesh with the driving gear, the driving gear 6 bites the rotating rack 4 and then drives the rotating plate 2 to rotate; the above structure is a conventional structure familiar to those skilled in the art. Only by changing the tooth parameters on the rotating rack 4 can special teeth be formed, which is an existing general conventional design and will not be elaborated in this application.

[0018] In order to form a self-locking structure, a linkage plate 7 is fixedly connected to the rotating rack 4, and a locking plate 14 is rotatably arranged on the lower side of the rotating plate 2. Preferably, as a conventional design, the locking plate 14 is rotatably arranged on the rotating plate 2 through a rotating shaft 12. A tension spring 13 is arranged on one side of the locking plate 14, one end of the tension spring 13 is connected with the rotating plate 2, a locking port 9 is arranged on the other side of the locking plate 14, a locking stop shaft 8 capable of being clamped in the locking port 9 is arranged on the upper side of the fixed middle plate 1, a pressing shaft 10 is fixedly arranged on the linkage plate 7, and a movable port 11 is formed on the locking plate 14. The pressing shaft 10 is movably arranged in the movable port 11.

[0019] In actual application, as Figure 1 As shown in the figure, it is the state when the rotating plate 2 is reset. At this time, the tension spring 13 gives a certain pulling force to the tail of the locking plate 14, and the rotating rack 4 is in the reset state. The pressing shaft 10 is located in the front side of the movable port 11. At this time, the locking port 9 is clamped on the locking stop shaft 8; as Figure 2 As shown in the figure, when the rotating plate 2 rotates, the rotating drive motor 5 drives the driving gear 6 to rotate, so that the rotating rack 4 rotates. At the same time, the rotating rack 4 drives the linkage plate 7 to move, so that the pressing shaft 10 presses to the rear side of the movable port 11 and applies a pressure to the lower rear side of the movable port 11, so that the locking port 9 is separated from the locking stop shaft 8, and then the unlocking of the rotating plate 2 is completed. When the rotating rack 4 rotates, when the driving gear 6 meshes and bites with the special teeth on the rotating rack 4, the rotation of the rotating plate 2 can be realized; when reset is needed, the driving gear 6 rotates in the reverse direction, the rotating rack 4 resets, and the locking device returns to Figure 1 the state.

[0020] It should be noted that the above embodiments only specifically and clearly describe the technical solutions and technical features of this application. For those skilled in the art, the solutions or features that belong to the prior art or common general knowledge are not described in detail in the above embodiments.

[0021] In addition, the technical solutions of this application are not limited to the above embodiments. Those skilled in the art should take the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation manners that can be understood by those skilled in the art.

Claims

1. A rotary locking device for a rotary lifting base of a welfare seat, comprising a fixed middle plate (1), a rotary plate (2) is rotatably connected to the upper side of the fixed middle plate (1) through a slewing bearing (3), a rotary rack (4) is rotatably connected to the lower end of the rotary plate (2), and a driving structure for driving the rotary rack (4) to rotate is arranged on the fixed middle plate (1), characterized in that, A linkage plate (7) is fixedly connected to the rotating rack (4). A locking plate (14) is rotatably arranged on the lower side of the rotating plate (2). A tension spring (13) is arranged on one side of the locking plate (14). One end of the tension spring (13) is connected to the rotating plate (2). A locking port (9) is arranged on the other side of the locking plate (14). A locking stop shaft (8) capable of being clamped in the locking port (9) is arranged on the upper side of the fixed middle plate (1). A pressing shaft (10) is fixedly arranged on the linkage plate (7). An activity port (11) is formed in the locking plate (14). The pressing shaft (10) is movably arranged in the activity port (11).

2. The rotational locking device for the rotary lifting base of the welfare seat according to claim 1, characterized in that, The driving structure includes a rotating drive motor (5) fixedly arranged on the fixed middle plate (1). The output end of the rotating drive motor (5) is connected with a drive gear (6). The drive gear (6) is meshed with the rotating rack (4).

Images