Circular linkage expansion device

Abstract

The utility model relates to the technical field of linkage expansion devices, in particular to a circular linkage expansion device. According to the utility model, the upper disc, the lower disc, the sliding devices, the arc-shaped sliding chutes, the limiting pieces, the arc-shaped pieces and the like are arranged, when in use, one arc-shaped piece is pulled by a hand, the arc-shaped piece is guided by the sliding rails in the sliding devices, the limiting pieces on the sliding blocks, namely the pin shafts with the bearings, can roll in the arc-shaped sliding chutes of the lower disc, and the sliding blocks do radial linear motion; the lower disc can be driven by the sliding blocks and the limiting pieces to rotate by a certain angle, then the lower disc rotates to drive other sliding rails to move in the radial direction, linkage expansion is achieved, on the contrary, one arc-shaped piece is pushed by hand, the movement direction is opposite, and linkage contraction can be achieved. In the whole process, the sliding blocks with the radial sliding rails and the arc-shaped sliding grooves of the lower disc are ingeniously utilized, one-to-many linkage is achieved, operation is convenient and fast, and expansion and contraction of the circular face can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of linkage expansion devices, in particular to a circular linkage expansion device. Background Art

[0002] In daily life or actual production operations, circular countertops or circular platforms are often involved. Traditional platforms are often of fixed area and cannot be expanded.

[0003] At present, expandable circular countertops or circular platforms have problems such as inconvenient deployment. At the same time, in some occasions, it is necessary to expand the approximately circular platform into a larger approximately circular platform, or retract the approximately circular platform into a smaller approximately circular platform, so as to complete the specified task or function. However, there are few circular countertops on the market that can conveniently achieve the above functions.

[0004] In summary, there is an urgent need for a circular linkage expansion device that can conveniently realize the expansion and retraction of a circular table top. Utility Model Content

[0005] The invention object of the utility model is to provide a circular linkage expansion device to solve the problems existing in the prior art, which can conveniently realize the expansion and retraction of the circular table top.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A circular linkage expansion device comprises an upper plate and a lower plate, which are movably connected; the upper plate is radially and evenly provided with a plurality of sliding devices, each of which is provided with a limiting member at one end close to the center of the upper plate and an arc-shaped member at one end away from the center of the upper plate; the lower plate is radially and evenly provided with a plurality of arc-shaped sliding grooves, a plurality of the arc-shaped sliding grooves correspond to a plurality of the sliding devices, and each of the limiting members is penetrated in the arc-shaped sliding groove; the lower plate is expanded and retracted by the sliding device, wherein the expansion and retraction distance of the lower plate is controlled by the movement of the limiting member in the arc-shaped sliding groove.

[0008] Preferably, the sliding device comprises a slide rail and a slider, and the slider is provided with a limit piece at one end close to the center of the upper plate, and with an arc-shaped piece at one end away from the center of the upper plate.

[0009] Preferably, the limiting member is a pin with a bearing, which is fixed to one end of the sliding block close to the center of the upper plate and is inserted into the arc-shaped sliding groove.

[0010] Preferably, the arc-shaped member comprises an upper arc-shaped member and a lower arc-shaped member, and the upper arc-shaped member and the lower arc-shaped member are alternately arranged.

[0011] Preferably, the upper arc-shaped member and the lower arc-shaped member are fixedly connected to the upper surface and the lower surface of the sliding block respectively.

[0012] Preferably, six sliding devices are evenly arranged along the radial direction of the upper plate, and six arc-shaped sliding grooves are evenly arranged along the radial direction of the lower plate, and each arc-shaped sliding groove corresponds to the sliding device.

[0013] Preferably, the lower plate center is provided with a bearing.

[0014] Preferably, a circular hole is provided in the center of the upper plate.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0016] The present invention is provided with an upper plate, a lower plate, a sliding device, an arc-shaped slide groove, a limiting piece, an arc-shaped piece, etc., wherein one side of the upper plate provided with the sliding device and the limiting piece corresponds to the side of the lower plate provided with the arc-shaped slide groove, and the limiting piece is placed in the arc-shaped slide groove, and the upper plate can be further fixed, and the center of the lower plate is provided with a bearing and can rotate. When in use, one of the arc-shaped pieces is pulled by hand, and the arc-shaped piece is guided by the slide rail in the sliding device, and the limiting piece on the slider, that is, the pin shaft with the bearing will roll in the arc-shaped slide groove of the lower plate, and the slider will make radial linear motion, and the lower plate will make rotational motion driven by the slider and the limiting piece, rotate a certain angle, and then the rotation of the lower plate drives the other slide rails to make radial motion, thereby realizing linkage expansion. Conversely, one of the arc-shaped pieces is pushed by hand, and the movement direction is opposite, which can realize linkage contraction. The whole process cleverly utilizes the arc-shaped slide groove with radial slide rail slider and the lower plate to realize one-to-many linkage, which is convenient and easy to operate, and can realize the expansion and contraction of the circular surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the utility model in a contracted state;

[0018] Figure 2 It is a schematic diagram of the expanded state of the utility model;

[0019] Figure 3 It is a schematic diagram of the utility model in an expanded state.

[0020] Markings in the figure: 1-upper plate, 2-sliding device, 21-slide rail, 22-sliding block, 3-limiting member, 4-arc-shaped member, 5-lower plate, 6-arc-shaped slide groove, 7-bearing. DETAILED DESCRIPTION

[0021] The utility model is described in detail below in conjunction with the accompanying drawings.

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] Example 1

[0024] A circular linkage expansion device, comprising an upper plate 1 and a lower plate 5, wherein the upper plate 1 and the lower plate 5 are movably connected; the upper plate 1 is evenly provided with a plurality of sliding devices 2 in the radial direction, each of which is provided with a stopper 3 at one end close to the center of the upper plate 1 and an arc-shaped member 4 at one end away from the center of the upper plate 1; the lower plate 5 is evenly provided with a plurality of arc-shaped slide grooves 6 in the radial direction, the plurality of arc-shaped slide grooves 6 correspond to the plurality of sliding devices 2, and each of which is penetrated in the arc-shaped slide grooves 6; the lower plate 5 is expanded and retracted through the sliding devices 2, wherein the movement of the stopper 3 in the arc-shaped slide grooves 6 controls the expansion and retraction distance of the lower plate 5. The upper plate 1 is movably connected with the lower plate 5 and can realize relative rotation, the upper plate 1 is radially provided with a sliding device 2, the sliding device 2 comprises a slide rail 21 and a slider 22, the slider 22 is provided with a stopper 3 at one end close to the center of the upper plate 1 and an arc-shaped member 4 at one end away from the center of the upper plate 1. When the circular expansion device of the present application is in a contracted state, the limit member 3 is at the end of the arc-shaped slide groove 6 close to the center end of the lower plate 5. When it is in an expanded state, the limit member 3 is at the end of the arc-shaped slide groove 5 away from the center end of the lower plate 5.

[0025] When in use, one of the arc-shaped parts 4 is pulled by hand, and the arc-shaped part 4 is fixedly connected to the slider 22, so the arc-shaped part 4 is guided by the slide rail 21, and the limiter 3 on the slider moves in the arc-shaped slot of the lower plate 5, and the slider 22 makes radial linear motion, and the lower plate 5 will rotate under the drive of the limiter 3, and rotate a certain angle, which is related to the arc angle of the arc-shaped slot 6. Since each of the limiters 3 is located in the arc-shaped slot 6, the rotation of the lower plate 5 drives the other sliders 22 to move radially, thereby realizing circular linkage expansion; conversely, one of the arc-shaped parts 4 is pushed by hand, the principle is the same, and the movement direction is opposite, so that the circular linkage contraction can be realized. The whole process utilizes the movement of the radial slide rail slider and the relative movement of the arc-shaped slot of the lower plate to realize one-to-many linkage, thereby realizing circular expansion and contraction, which is convenient to use, and the contraction is uniform and circular before and after.

[0026] Specifically, the stopper 3 is a pin with a bearing, which is fixed to one end of the slider 22 close to the center of the upper plate 1 and is inserted into the arc-shaped slide groove 6. The stopper 3 is a pin with a bearing, so that the stopper 3 can roll in the arc-shaped slide groove 6, and the operation is smoother. The pin with a bearing is an existing conventional technology, so it is not described in detail in this application.

[0027] Specifically, the arc-shaped member 4 includes an upper arc-shaped member 41 and a lower arc-shaped member 42, and the upper arc-shaped member 41 and the lower arc-shaped member 42 are alternately arranged. The upper arc-shaped member 41 and the lower arc-shaped member 42 are alternately arranged and movably connected without interfering with each other, so that they can be contracted to form a full circle.

[0028] Specifically, the upper arc-shaped member 41 and the lower arc-shaped member 42 are respectively fixedly connected to the upper surface and the lower surface of the slider 22. As long as there is no motion interference between the upper arc-shaped member 41 and the lower arc-shaped member 42, in order to ensure smooth use, they can be arranged on the upper and lower surfaces of the slider 22, thereby ensuring a certain spacing distance.

[0029] Specifically, six sliding devices 2 are evenly arranged along the radial direction of the upper plate 1, and six arc-shaped slide grooves 6 are evenly arranged along the radial direction of the lower plate 5, and each arc-shaped slide groove 6 corresponds to the sliding device 2. Six sliding devices 2 and arc-shaped slide grooves 6 are arranged, and the relative movement of each limiter 3 and the arc-shaped slide groove 6 is uniformly stressed during use. In actual applications, they can be evenly arranged according to actual conditions.

[0030] Specifically, the center of the lower plate 5 is provided with a bearing 7. During actual installation and use, the lower plate 5 needs to perform a rotational motion, so the bearing 7 is provided to ensure smooth rotation. Further, the center of the upper plate 1 is provided with a circular hole. During installation and use, the upper plate 1 can be fixed through the circular hole in the center of the plate, such as by welding it to the main shaft, etc. In short, the upper plate 1 is fixedly arranged, and the lower plate 5 can be rotatably arranged. For example: the present application can provide a fixed base member, such as a vehicle, and the main shaft is fixedly installed on the vehicle, and the bearing 7 in the center of the lower plate 5 is inserted into the main shaft, and one side of the arc-shaped slide groove 6 faces upward, and the upper plate 1 is fixed on the main shaft, which can be welded, clamped, etc., and the side with the sliding device 2 faces downward, and is adapted to the lower plate 5, and a certain gap is left between the upper and lower plates to ensure smooth operation.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A circular linkage expansion device, characterized in that: It comprises an upper plate (1) and a lower plate (5), wherein the upper plate (1) and the lower plate (5) are movably connected; The upper plate (1) is evenly provided with a plurality of sliding devices (2) in a radial direction, and each of the sliding devices (2) is provided with a limiting member (3) at one end close to the center of the upper plate (1) and an arc-shaped member (4) at one end away from the center of the upper plate (1); The lower plate (5) is evenly provided with a plurality of arc-shaped sliding grooves (6) in the radial direction, the plurality of arc-shaped sliding grooves (6) correspond to the plurality of sliding devices (2), and each of the limiting members (3) is inserted into the arc-shaped sliding groove (6); The upper plate (1) is expanded and retracted by means of the sliding device (2), wherein the expansion and retraction distance of the upper plate (1) is controlled by the movement of the limiting member (3) in the arc-shaped sliding groove (6).

2. A circular linkage expansion device according to claim 1, characterized in that: The sliding device (2) comprises a sliding rail (21) and a sliding block (22); the sliding block (22) is provided with a limiting member (3) at one end close to the center of the upper plate (1), and with an arc-shaped member (4) at one end away from the center of the upper plate (1).

3. A circular linkage expansion device according to claim 2, characterized in that: The limiting member (3) is a pin with a bearing, which is fixed to one end of the slider (22) close to the center of the upper plate (1) and is inserted into the arc-shaped slide groove (6).

4. A circular linkage expansion device according to claim 3, characterized in that: The arc-shaped member (4) comprises an upper arc-shaped member (41) and a lower arc-shaped member (42), and the upper arc-shaped member (41) and the lower arc-shaped member (42) are arranged alternately.

5. A circular linkage expansion device according to claim 4, characterized in that: The upper arc-shaped member (41) and the lower arc-shaped member (42) are respectively fixedly connected to the upper surface and the lower surface of the sliding block (22).

6. A circular linkage expansion device according to claim 5, characterized in that: Six sliding devices (2) are evenly arranged along the radial direction of the upper plate (1), and six arc-shaped sliding grooves (6) are evenly arranged along the radial direction of the lower plate (5), and each arc-shaped sliding groove (6) corresponds to the sliding device (2).

7. A circular linkage expansion device according to claim 6, characterized in that: A bearing (7) is provided at the center of the lower plate (5).

8. A circular linkage expansion device according to claim 7, characterized in that: The center of the upper plate (1) is provided with a circular hole.

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