Planning board for teaching

Abstract

The utility model is suitable for the technical field of planning boards, and provides a planning board for teaching, which comprises a base, a fixed gear, a first rotating shaft and a second rotating shaft, the supporting assembly comprises a rotating disc rotationally arranged at the top of the base, a bearing frame is arranged above the base, a planning plate is arranged in the bearing frame, rotating shafts are arranged on the side walls of the two ends of the planning plate, adjusting gears are rotationally arranged on the rotating shafts, first ratchet wheels are arranged on the adjusting gears, first racks are arranged on the supporting plates, and threaded shafts are rotationally arranged on the rotating disc; two threaded blocks are arranged on the threaded shaft, a cross rod set is arranged between the threaded blocks and the bearing frame, a transmission shaft is rotationally arranged on the rotating disc, a driving gear is arranged at the top of the transmission shaft, second racks are arranged on the threaded blocks, driven gears are rotationally arranged on the transmission shaft, and second ratchet wheels are arranged on the driven gears. Therefore, the height of the planning board can be adjusted, the horizontal angle and the vertical angle of the planning board can be adjusted, and the use cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of planning boards, in particular to a planning board for teaching. Background Art

[0002] The public utility management major aims to cultivate senior professionals with knowledge in modern management theories, technologies, methods, etc. and the ability to apply this knowledge. During the education process of the public utility management major, it is often necessary to use a planning board for assistance.

[0003] There are various planning boards for teaching in the prior art. For example, a planning board for facilitating the analysis of public utility management with the publication number CN210955629U includes a bottom plate. It is characterized in that: a support column is fixedly installed on the upper surface of the bottom plate, a telescopic rod is fixedly installed on the upper surface of the support column, one end of the telescopic rod is fixedly installed with a control seat, a connecting rod is fixedly installed on the upper surface of the control seat, a connecting plate is fixedly installed on one side of the connecting rod, a first sliding groove is arranged inside the connecting plate, a first pulley is slidably connected inside the first sliding groove, a left planning board is fixedly installed at one end of the first pulley, a middle planning board is fixedly installed on the lower surface of the connecting plate, and a right planning board is movably connected to the right side of the middle planning board. It can realize the expansion and contraction of the planning board, but the above device lacks an automatic adjustment structure for the horizontal angle and vertical angle of the planning board, and it is still inconvenient to use.

[0004] In summary, it is obvious that the prior art has inconveniences and defects in actual use, so it is necessary to improve. Content of the Utility Model

[0005] Aiming at the above defects, the purpose of the utility model is to provide a planning board for teaching, which can not only adjust the height of the planning board, but also adjust the horizontal angle and vertical angle of the planning board, and can also reduce the use cost.

[0006] To achieve the above object, the utility model provides a teaching planning board, comprising: a base, inside which a fixed gear is provided; a support assembly, which includes a turntable and a support plate. The turntable is rotatably provided on the top of the base. Two opposite support plates are provided on the turntable. A bearing frame is provided above the base. A planning board is provided inside the bearing frame. Rotating shafts rotatably connecting the bearing frame are provided on both side walls at the two ends of the planning board. Adjusting gears are rotatably provided on the rotating shafts. First ratchets are provided on the adjusting gears. First pawls are provided on the rotating shafts. First racks are provided on the support plates. A threaded shaft is rotatably provided on the turntable. Two threaded blocks with opposite thread directions are provided on the threaded shaft. A cross bar group is provided between the threaded block and the bearing frame. Two transmission shafts are rotatably provided on the turntable. A driving gear is provided at the top of the transmission shaft. Second racks are provided on the threaded blocks. Driven gears are rotatably provided on the transmission shafts. Second ratchets are provided on the driven gears. Second pawls are provided on the transmission shafts.

[0007] According to the teaching planning board of the utility model, a driving member is provided on the bottom surface of the turntable, and a belt is provided between the output shaft of the driving member and the threaded shaft.

[0008] According to the teaching planning board of the utility model, a plurality of limiting rods passing through the threaded blocks are provided beside the threaded shaft, and both ends of the limiting rods are respectively connected to the two support plates.

[0009] According to the teaching planning board of the utility model, a receiving cavity is provided inside the base, the turntable is rotatably provided on the top of the receiving cavity, and a counterweight is provided on the bottom surface of the receiving cavity.

[0010] According to the teaching planning board of the utility model, when the adjusting gear meshes with the first rack and the bearing frame moves upward, the first ratchet cooperates with the first pawl. When the driving gear meshes with the second rack and the two threaded blocks move away from each other, the second ratchet cooperates with the second pawl.

[0011] According to the teaching planning board of the utility model, a fixed shaft is fixedly connected to the bottom surface of the receiving cavity, and a fixed rack is fixedly connected to the fixed shaft.

[0012] The purpose of the utility model is to provide a teaching planning board, and its beneficial effects are as follows:

[0013] 1. By setting the support assembly, the height of the planning board can be adjusted, and the horizontal angle and vertical angle of the planning board can also be adjusted, realizing the multi-directional automatic adjustment of the planning board, and meeting the use requirements.

[0014] 2. By setting the support assembly, the planning board can be adjusted in multiple directions through one power source, reducing the manufacturing and use costs.

[0015] In summary, the beneficial effects of the present utility model are as follows: it can not only adjust the height of the planning board, but also adjust the horizontal and vertical angles of the planning board, and can also reduce the use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the external structure of the present utility model;

[0017] Figure 2 is a side cross-sectional view of the present utility model;

[0018] Figure 3 is Figure 2 an enlarged schematic diagram of the structure of part A of

[0019] In the figure: 1 - base, 11 - accommodation cavity, 12 - fixed shaft, 13 - fixed gear, 2 - support assembly, 21 - turntable, 211 - support plate, 212 - first rack, 22 - carrying frame, 23 - planning board, 231 - rotating shaft, 232 - adjusting gear, 24 - threaded shaft, 25 - driving member, 26 - threaded block, 261 - cross bar group, 262 - second rack, 27 - transmission shaft, 28 - driving gear, 29 - driven gear. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0021] Referring to Figures 1 to 3 , the present utility model provides a teaching planning board, including a base 1 and a support assembly 2. A plurality of universal wheels (not shown in the figure) are installed on the bottom surface of the base 1 to facilitate the user to push the device. An accommodation cavity 11 is provided inside the base 1, an opening is provided at the top of the accommodation cavity 11, and a support assembly 2 is provided on the base 1.

[0022] Referring to Figures 1 to 3, the support component 2 includes a turntable 21 and a support plate 211. The turntable 21 is rotatably arranged at the top end of the accommodation cavity 11. There are two symmetrically and vertically arranged support plates 211 on the turntable 21. The two support plates 211 are respectively arranged at both ends of the turntable 21. Above the turntable 21, there is a bearing frame 22. The bearing frame 22 is slidably connected to the support plates 211. A planning plate 23 is rotatably arranged on the bearing frame 22. Rotating shafts 231 are arranged on both side walls of the planning plate 23. The rotating shafts 231 are respectively rotatably connected to the bearing frame 22. The two rotating shafts 231 respectively pass through the two support plates 211. Chute grooves that cooperate with the rotating shafts 231 are arranged on the support plates 211. Adjusting gears 232 are rotatably connected to the ends of the rotating shafts 231. First ratchets are arranged on the adjusting gears 232. First ratchet pawls are unidirectionally rotatably connected to the rotating shafts 231. Torsion springs are arranged at the connection positions of the rotating shafts 231 and the ratchet pawls. First racks 212 that mesh with the adjusting gears 232 are arranged on the tops of the support plates 211. When the adjusting gears 232 mesh with the first racks 212 and the bearing frame 22 moves upward, the first ratchets cooperate with the first ratchet pawls, and the adjusting gears 232 drive the planning plate 22 to rotate; when the adjusting gears 232 mesh with the first racks 212 and the bearing frame 22 moves downward, the first ratchets do not cooperate with the first ratchet pawls, and the adjusting gears 232 cannot drive the planning plate 22 to rotate.

[0023] See Figures 1 to 3 , a threaded shaft 24 is rotatably arranged in the accommodation cavity 11. Both ends of the threaded shaft 24 are rotatably connected to the support plates 211. A driving member 25 is arranged on the bottom surface of the turntable 211. A belt is connected between the output shaft of the driving member 25 and the threaded shaft 24. Two threaded blocks 26 are arranged on the threaded shaft 24. The two threaded blocks 26 are provided with internal threads with opposite directions. Threads that cooperate with the threaded blocks 26 are arranged on the threaded shaft 24 (that is, the thread directions at both ends of the threaded shaft 24 are opposite). When the threaded shaft 24 rotates, the two threaded blocks 26 move synchronously in opposite directions. A cross-bar group 261 is arranged between the threaded blocks 26 and the bearing frame 22 (that is, the two top ends of the cross-bar group 261 are respectively rotatably connected to two sliders, the sliders are both slidably connected to the bottom surface of the bearing frame 22, and the two bottom ends of the cross-bar group 261 are respectively rotatably connected to the threaded blocks 26). An avoidance groove that cooperates with the cross-bar group 261 is arranged on the turntable 21.

[0024] See Figures 1 to 3, on the side of the threaded blocks 26 away from the center of the turntable 21, drive shafts 27 are rotatably provided. The bottom ends of the drive shafts 27 are rotatably connected to extension plates, and the extension plates are fixedly connected to the turntable 21. The top ends of the drive shafts 27 are connected to driving gears 28. On the bottom surfaces of the threaded blocks 26, there are second racks 262 that can mesh with the driving gears 28. By adjusting the positional relationship between the driving gears 28 and the second racks 262, the two threaded blocks 26 move synchronously in opposite directions, and when the second racks 262 and the driving gears 28 are in the meshing state, the two drive shafts 27 rotate in the same direction. The bottom of the drive shaft 27 is rotatably connected to a driven gear 29, and second ratchets are provided on the driven gears 29. Second pawls are unidirectionally rotatably connected to the drive shafts 27, and torsion springs are provided at the connections between the drive shafts 27 and the second pawls. When the second racks 262 and the driving gears 28 are meshed and the two threaded blocks 26 move away from each other, the second ratchets cooperate with the second pawls. On the bottom surface of the accommodating cavity 11, a fixed shaft 12 is fixedly connected, and a fixed gear 13 that can mesh with the driven gear 28 is fixedly connected to the fixed shaft 12. When the driven shaft 28 rotates, it can drive the turntable 21 to rotate.

[0025] See Figures 1 to 3 , preferably, the diameter of the driving gear 28 is much smaller than that of the driven gear 29, which can achieve rapid adjustment of the horizontal angle of the turntable 21.

[0026] See Figures 1 to 3 , preferably, a number of limiting rods passing through the threaded blocks 26 are provided beside the threaded shafts 24. Both ends of the limiting rods are connected to the support plates 211, and the limiting rods can prevent the threaded blocks 26 from rotating on their own.

[0027] See Figures 1 to 3 , preferably, the bottom wall of the accommodating cavity 11 is thickened or a counterweight is provided at the bottom of the accommodating cavity 11, which can reduce the risk of the device tipping over.

[0028] See Figures 1 to 3 , preferably, the driving member 25 is a rotating motor, which can provide sufficient power.

[0029] During the implementation of this utility model: The user moves this device to a suitable position. When it is necessary to adjust the height of the planning board 23, the driving member 25 is started. The driving member 25 drives the threaded shaft 24 to rotate, causing the two threaded blocks 26 to approach (or move away) from each other. Under the action of the cross-bar group 261, the bearing frame 22 drives the planning board 23 to rise (or fall). When it is necessary to adjust the rotation angle of the turntable 21, the driving member 25 is started, causing the two threaded blocks 26 to move away from each other. The second rack 262 meshes with the driving gear 28. At this time, the two threaded blocks 26 continue to move away from each other. The second ratchet wheel cooperates with the second ratchet pawl, and the transmission shaft 27 drives the driven gear 29 to rotate. Under the meshing action of the driven gear 29 and the fixed gear 13, the turntable 21 rotates. When it is necessary to adjust the rotation angle of the planning board 23, the driving member 25 is started, causing the two threaded blocks 26 to approach each other. When the adjusting gear 232 meshes with the first rack 212, at this time, the two threaded blocks 26 continue to approach each other. The first ratchet wheel cooperates with the first ratchet pawl, and the adjusting gear 232 drives the rotating shaft 231 to rotate, and the planning board 23 rotates.

[0030] This utility model provides a teaching planning board, and its beneficial effects are as follows:

[0031] 3. By setting the support component, it can not only adjust the height of the planning board, but also adjust the horizontal angle and vertical angle of the planning board, realizing the multi-directional automatic adjustment of the planning board, and can meet the use requirements.

[0032] 4. By setting the support component, the planning board can be adjusted in multiple directions through one power source, reducing the manufacturing and use costs.

[0033] In summary, the beneficial effects of this utility model are: It can not only adjust the height of the planning board, but also adjust the horizontal angle and vertical angle of the planning board, and can also reduce the use cost.

[0034] Of course, this utility model can also have multiple embodiments. Without departing from the spirit and essence of this utility model, those skilled in the art can make corresponding changes and deformations according to this utility model. However, these corresponding changes and deformations should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A teaching planning board, characterized in that: include: A base having a fixed gear disposed therein; The support assembly comprises a turntable and a support plate, the top of the base is rotatably provided with a turntable, the turntable is provided with two opposite support plates, the base is provided with a carrying frame above the base, a planning plate is provided in the carrying frame, and a rotating shaft is rotatably connected to the carrying frame on the side walls at both ends of the planning plate, and an adjusting gear is rotatably provided on the rotating shaft, the adjusting gear is provided with a first ratchet, the rotating shaft is provided with a first pawl, the support plate is provided with a first rack, the turntable is rotatably provided with a threaded shaft, the threaded shaft is provided with two threaded blocks with opposite thread directions, a cross rod group is provided between the threaded block and the carrying frame, the turntable is rotatably provided with two transmission shafts, the top of the transmission shaft is provided with a driving gear, the threaded blocks are provided with a second rack, the transmission shaft is rotatably provided with a driven gear, the driven gear is provided with a second ratchet, and the transmission shaft is provided with a second pawl.

2. The teaching planning board according to claim 1, characterized in that: A driving member is arranged on the bottom surface of the rotating disk, and a belt is arranged between the output shaft of the driving member and the threaded shaft.

3. The teaching planning board according to claim 1, characterized in that: A plurality of limiting rods passing through the threaded block are arranged beside the threaded shaft, and two ends of the limiting rods are respectively connected to two supporting plates.

4. The teaching planning board according to claim 1, characterized in that: A receiving cavity is arranged in the base, the turntable is rotatably arranged on the top of the receiving cavity, and a counterweight block is arranged on the bottom surface of the receiving cavity.

5. The teaching planning board according to claim 1, characterized in that: When the adjusting gear is meshed with the first rack and the carrying frame moves upward, the first ratchet cooperates with the first pawl, and when the driving gear is meshed with the second rack and the two threaded blocks move away from each other, the second ratchet cooperates with the second pawl.

6. The teaching planning board according to claim 4, characterized in that: A fixed shaft is fixedly connected to the bottom surface of the accommodating cavity, and a fixed rack is fixedly connected to the fixed shaft.

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