Screw drive demonstration mechanism

Abstract

The utility model belongs to the field of teaching equipment, and particularly relates to a spiral transmission demonstration mechanism, which comprises a rack and a transmission screw rod arranged on the rack, the middle of the transmission screw rod is connected with a transmission nut positioned above the rack, and the left end and the right end of the rack are respectively provided with a fixing assembly for fixing the transmission screw rod. A limiting assembly making contact with the transmission screw and the transmission nut is installed on the rack, and one end of the transmission screw is connected with a driving assembly. According to the limiting assembly, different parts are selected to be combined and assembled, different screw transmission principles can be achieved, four common screw transmission principles and motion modes can be visually demonstrated, the installation positions of the different parts are obvious, the installation mode is simple, the operation difficulty of the device is reduced, in addition, the building block type combination mode is adopted, and the installation cost is reduced. And the learning interestingness of a common screw transmission mechanism is increased.

Description

Technical Field

[0001] The utility model belongs to the field of teaching equipment, in particular to a spiral transmission demonstration mechanism. Background Art

[0002] Screw transmission is a typical mechanical transmission method. Ordinary screw transmission devices are mainly composed of screws, nuts and frames. They use the meshing of screws and nuts to transmit motion and power, converting the rotational motion of the active part into the linear motion of the driven part.

[0003] Although the existing spiral transmission demonstration equipment can demonstrate different spiral transmission motion modes, it is still necessary to manually apply additional limiting force to the screw or nut, and its operation method is complicated, resulting in the defect of increased difficulty in demonstration operation.

[0004] The utility model designs a spiral transmission demonstration mechanism to solve the above problems. Utility Model Content

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A spiral transmission demonstration mechanism comprises a frame and a transmission screw mounted on the frame, a transmission nut located above the frame is connected in the middle of the transmission screw, fixing components for fixing the transmission screw are respectively installed at the left and right ends of the frame, a limiting component in contact with the transmission screw and the transmission nut is installed on the frame, and a driving component is connected to one end of the transmission screw.

[0007] As a preferred solution, a mounting groove is provided in the middle of the frame and located at the lower side of the driving nut, and the limiting assembly is installed in the mounting groove.

[0008] As a preferred solution, the limiting assembly includes a limiting plate installed in the installation groove, and baffles located on the left and right sides of the driving nut are respectively installed on the limiting plate.

[0009] As a preferred solution, a pad in contact with the outer wall of the transmission nut is placed on the upper end of the limiting plate.

[0010] As a preferred solution, the limiting assembly includes a positioning nut installed at the other end of the transmission screw and located on the inner side of the frame.

[0011] As a preferred solution, a bottom plate in contact with the outer wall of the transmission nut is installed in the installation groove.

[0012] As a preferred solution, a placement groove capable of accommodating the bottom plate is provided at the bottom of the frame.

[0013] As a preferred solution, the fixing assembly includes two pressure plates respectively installed at the left and right ends of the frame through positioning pins, and the left and right ends of the transmission screw extend respectively between the two pressure plates and the upper end of the frame.

[0014] As a preferred solution, the driving assembly includes a wrench installed at one end of the transmission screw and located outside the frame.

[0015] Compared with the existing technology, the advantages of the utility model are:

[0016] 1. The limit assembly designed by the utility model can realize different spiral transmission principles by selecting different parts for combination and assembly, intuitively demonstrating four commonly used spiral transmission principles and motion modes, and the installation positions of different parts are obvious and the installation method is simple, which reduces the difficulty of operating the equipment. In addition, the building block combination method is adopted to increase the interest of learning ordinary spiral transmission mechanisms.

[0017] 2. The shapes of all parts included in the rack and the limit assembly designed by the utility model can be loaded with all parts by the rack, so as to achieve the function of completely storing and arranging all parts, which is convenient for use and storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the utility model in the assembled storage state.

[0019] Figure 2 It is a schematic diagram of embodiment 1 of the utility model.

[0020] Figure 3 It is a schematic diagram of embodiment 2 of the present utility model.

[0021] Figure 4 It is a schematic diagram of Example 3 of the utility model.

[0022] Figure 5 It is a schematic diagram of embodiment 4 of the present utility model.

[0023] The reference numbers in the figure are as follows: 1. frame; 2. transmission screw; 3. transmission nut; 4. mounting slot; 5. limit plate; 6. baffle; 7. pad; 8. positioning nut; 9. bottom plate; 10. placement slot; 11. pressure plate; 12. wrench. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments or drawings are used to illustrate the present invention, but are not intended to limit the scope of the present invention. Example 1

[0025] A spiral transmission demonstration mechanism, such as Figure 1As shown, it includes a frame 1 and a transmission screw 2 installed on the frame 1, a transmission nut 3 located above the frame 1 is connected in the middle of the transmission screw 2, and fixing components for fixing the transmission screw 2 are respectively installed on the left and right ends of the frame 1. A limiting component in contact with the transmission screw 2 and the transmission nut 3 is installed on the frame 1, and one end of the transmission screw 2 is connected to a driving component.

[0026] The fixing assembly includes two pressure plates 11 respectively installed at the left and right ends of the frame 1 through positioning pins, and the left and right ends of the transmission screw 2 respectively extend to between the two pressure plates 11 and the upper end of the frame 1; the driving assembly includes a wrench 12 installed at the right end of the transmission screw 2 and located on the outside of the frame 1.

[0027] like Figure 2 As shown, a mounting groove 4 is provided in the middle of the frame 1 and is located at the lower side of the driving nut 3. The limiting assembly is a limiting plate 5 installed in the mounting groove 4. Baffles 6 located on the left and right sides of the driving nut 3 are respectively installed on the limiting plate 5. The baffles 6 do not contact the driving screw 2.

[0028] The baffle 6 limits the ability of the transmission nut 3 to move laterally left and right on the frame 1. When the rotation of the transmission screw 2 is restricted, the transmission nut 3 can be rotated to make the transmission screw 2 move laterally on the frame 1, that is, the transmission nut 3 rotates in place and the transmission screw 2 moves linearly. The demonstration mode can demonstrate the action of spirally adjusting the position of the observation mirror of a telescope, for example. Example 2

[0029] The difference from Example 1 is that Figure 3 As shown, a pad 7 in contact with the outer wall of the transmission nut 3 is placed on the upper end of the limiting plate 5 .

[0030] The baffle 6 limits the lateral movement of the transmission nut 3, and the pad 7 limits the rotation of the transmission nut 3. Rotating the transmission screw 2 can make the transmission screw 2 move laterally on the frame 1, that is, the transmission nut 3 is fixed, and the transmission screw 2 rotates and moves linearly. The demonstration mode can demonstrate, for example, the movement mode of the movable jaws of a bench vise. Example 3

[0031] The difference from Example 1 is that Figure 4 As shown, the limiting component is a positioning nut 8 installed at the left end of the transmission screw 2 and located on the inner side of the frame 1.

[0032] The positioning nut 8 limits the lateral movement of the transmission screw 2. When the rotation of the transmission screw 2 is limited, rotating the transmission nut 3 can make the transmission nut 3 move laterally. That is, the transmission screw 2 is fixed and the transmission nut 3 rotates and moves. The demonstration mode can demonstrate the movement mode of a screw jack lifting device, for example. Example 4

[0033] The difference from Example 3 is that Figure 5 As shown, a bottom plate 9 in contact with the outer wall of the driving nut 3 is installed in the installation groove 4; a placement groove 10 capable of accommodating the bottom plate 9 is provided at the bottom of the frame 1, and the bottom plate 9 can be received in the placement groove 10.

[0034] The positioning nut 8 limits the lateral movement of the transmission screw 2, and the base plate 9 limits the rotation of the transmission nut 3. Rotating the transmission screw 2 can drive the transmission nut 3 to move lateral, that is, the transmission screw 2 rotates in place and the transmission nut 3 moves linearly. The demonstration mode can demonstrate the movement mode of the worktable of the slide feed mechanism in a lathe, for example.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A spiral transmission demonstration mechanism, characterized in that: The invention comprises a frame (1) and a transmission screw (2) mounted on the frame (1); a transmission nut (3) located above the frame (1) is connected in the middle of the transmission screw (2); fixing components for fixing the transmission screw (2) are respectively mounted on the left and right ends of the frame (1); a limiter component contacting the transmission screw (2) and the transmission nut (3) is mounted on the frame (1); and a driving component is connected to one end of the transmission screw (2).

2. A spiral transmission demonstration mechanism according to claim 1, characterized in that: A mounting groove (4) located below the driving nut (3) is provided in the middle of the frame (1), and the limit assembly is installed in the mounting groove (4).

3. A spiral transmission demonstration mechanism according to claim 2, characterized in that: The limiting assembly comprises a limiting plate (5) installed in the installation groove (4), and baffles (6) located on the left and right sides of the driving nut (3) are respectively installed on the limiting plate (5).

4. A spiral transmission demonstration mechanism according to claim 3, characterized in that: A pad (7) is placed on the upper end of the limit plate (5) and is in contact with the outer wall of the transmission nut (3).

5. A spiral transmission demonstration mechanism according to claim 2, characterized in that: The limiting assembly comprises a positioning nut (8) mounted on the other end of the transmission screw rod (2) and located on the inner side of the frame (1).

6. A spiral transmission demonstration mechanism according to claim 5, characterized in that: A bottom plate (9) in contact with the outer wall of the transmission nut (3) is installed in the installation groove (4).

7. A spiral transmission demonstration mechanism according to claim 6, characterized in that: The bottom of the frame (1) is provided with a placement groove (10) capable of accommodating a bottom plate (9).

8. A spiral transmission demonstration mechanism according to claim 1, characterized in that: The fixing assembly comprises two pressing plates (11) respectively mounted on the left and right ends of the frame (1) via positioning pins, and the left and right ends of the transmission screw rod (2) respectively extend between the two pressing plates (11) and the upper end of the frame (1).

9. A spiral transmission demonstration mechanism according to claim 1, characterized in that: The driving assembly comprises a wrench (12) mounted on one end of a driving screw rod (2) and located outside the frame (1).

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