Circular grating measuring structure for teaching display

Abstract

The utility model relates to a circular grating measuring structure for teaching display, which comprises a base and a mounting seat arranged on the base, a power mechanism and a measuring component are respectively mounted on two sides of the mounting seat, the power mechanism comprises a motor and a speed reducer, the speed reducer is positioned on one side of the mounting seat, and the measuring component is positioned on the mounting seat. The mounting base is provided with a first through hole for allowing an output shaft of the power mechanism to penetrate through, the measuring assembly comprises a circular grating arranged at the end of the output shaft of the power mechanism and a reading head arranged on the mounting base and used for measuring the position of the circular grating, and the reading head right faces the circumference of the circular grating. According to the circular grating measuring structure for teaching demonstration, the real-time rotating speed and angle of the output shaft of the power mechanism can be measured through the cooperation of the circular grating and the reading head, and teaching demonstration is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching instruments and equipment, in particular to a circular grating measurement structure used for teaching demonstration. Background Art

[0002] Gratings are precision optical components that are widely used in physics, optical measurement, spectral analysis, and precision mechanical positioning. Gratings include linear gratings and circular gratings. Circular gratings usually consist of a disk (i.e., a grating disk) with precise, equally spaced lines. These lines can be alternating transparent and opaque areas, or made of magnetic materials to accommodate different types of readheads.

[0003] At present, when learning about circular gratings in class, there is usually only theoretical teaching without practical experiments, which is not conducive to students' in-depth understanding of how to use circular gratings and their specific structure and working principles. Utility Model Content

[0004] The technical problem to be solved by the utility model is that, in view of the above-mentioned defects, a circular grating measurement structure for teaching demonstration is provided, which can measure the real-time rotation speed and angle of the output shaft of the power mechanism through the cooperation of the circular grating and the reading head, so as to facilitate teaching demonstration.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a circular grating measurement structure for teaching demonstration, comprising a base and a mounting seat arranged on the base, a power mechanism and a measuring component are respectively installed on both sides of the mounting seat, the power mechanism comprises a motor and a reducer, the reducer is located on one side of the mounting seat, and the mounting seat is provided with a first through hole for accommodating the output shaft of the power mechanism to pass through, the measuring component comprises a circular grating arranged at the end of the output shaft of the power mechanism and a reading head arranged on the mounting seat and used for measuring the position of the circular grating, and the reading head is directly opposite to the circumference of the circular grating.

[0006] The working principle of this solution is as follows: the circular grating is installed on the rotating shaft, and the matching reading head is fixed in a relatively static position. When the circular grating rotates, the grating lines on it and the fixed grating (or magnetic sensing element) inside the reading head form a relative movement. This relative movement will generate moiré fringes. The reading head usually contains photoelectric elements (for optical circular gratings) or magnetic sensitive elements (for magnetic circular gratings), which can sense the changes in these moiré fringes and convert them into electrical signals. As the circular grating rotates, the moiré fringes move on the reading head, causing the frequency or amplitude of the electrical signal to change. By detecting the changes in these electrical signals, such as frequency or phase changes, the rotation angle of the circular grating can be calculated.

[0007] Compared with the prior art, the beneficial effect of the present solution is that: when in use, the motor and the reducer are installed on one side of the mounting seat, the circular grating and the reading head are installed on the other side of the mounting seat, the output shaft of the power mechanism passes through the mounting seat through the first through hole set on the mounting seat, the circular grating is detachably connected to one end of the output shaft of the power mechanism passing through the mounting seat, the reading head is located on the mounting seat and is opposite to the circumference of the circular grating, the rotation of the motor drives the output shaft of the power mechanism to rotate, and the rotation of the output shaft of the power mechanism drives the circular grating fixed thereon to rotate, and the reading head is aligned with the circular grating, and the real-time rotation speed and angle of the output shaft of the power mechanism are measured through the cooperation of the circular grating and the reading head, which is convenient for teaching demonstration.

[0008] As a preferred embodiment of the utility model, the power mechanism is detachably connected to one side of the mounting base, the reading head is detachably connected to the other side of the mounting base, and the circular grating is detachably connected to one end of the power mechanism output shaft extending out of the first through hole.

[0009] The beneficial effects of this solution are as follows: the power mechanism and the measuring assembly are both detachably connected to the mounting base, and can be disassembled and stored when there is no need for teaching demonstration or when replacement is required, thereby extending the service life of the circular grating.

[0010] As a preferred embodiment of the utility model, a stepped hole connected to the first through hole is formed on the mounting seat, a mounting platform is detachably connected to the stepped hole, a second through hole for the output shaft of the power mechanism to pass through is provided on the mounting platform along its axial direction, a first mounting portion and a second mounting portion are respectively provided on both sides of the mounting platform, the first mounting portion matches the stepped hole, and the circular grating is sleeved on the second mounting portion and fixed by a connecting piece.

[0011] The beneficial effects of this solution are as follows: if the circular grating is directly mounted on the output shaft of the power mechanism, the accuracy of the circular grating and the output shaft of the power mechanism need to be fully matched to ensure the stability of the connection. In this solution, the mounting platform is matched with the stepped hole provided on the mounting seat through the first mounting part, and the output shaft of the power mechanism passes through the second through hole to support and connect the mounting platform. The circular grating is then sleeved on the second mounting part and fixed by a connecting piece, which can effectively avoid the problems of accuracy matching and connection stability between the circular grating and the output shaft of the power mechanism.

[0012] As a preferred embodiment of the utility model, a first annular step surface and a second annular step surface are formed between the stepped hole and the mounting seat, the diameter of the first annular step surface is greater than the diameter of the second annular step surface, and the first mounting portion includes a first boss and a second boss connected in sequence, and the first boss and the second boss are matched with the first annular step surface and the second annular step surface, respectively.

[0013] The beneficial effect of this solution is as follows: when the mounting platform is placed in the stepped hole on the mounting seat, the first boss and the second boss are respectively fitted with the first annular stepped surface and the second annular stepped surface, so that the first mounting portion located on one side of the mounting platform can be completely matched with the stepped hole, thereby making the connection more stable and avoiding the mounting platform from shaking when rotating with the rotation of the output shaft of the power mechanism, thereby affecting the measurement results.

[0014] As a preferred embodiment of the utility model, a bearing is provided between the first boss and the second annular step surface, and a plurality of fixing holes are opened on the first annular step surface along its circumference, and the bearing is fixed to the mounting seat by passing the fixing piece through the fixing holes.

[0015] The beneficial effect of this solution is that when the mounting platform rotates along with the rotation of the output shaft of the power mechanism, the bearing arranged in the second annular step surface and fixed by the fixing member is located outside the first boss, and the bearing supports the first boss.

[0016] As a preferred embodiment of the utility model, a positioning hole is opened on the second mounting part along its radial direction, a positioning member with a flat lower end face is provided in the positioning hole, a flat groove is opened on the outer circular surface of the output shaft of the power mechanism along its axial direction, the lower end of the positioning member is located in the flat groove, and the outer edge of the positioning member is limited by a circular grating sleeved on the second mounting part.

[0017] The beneficial effects of this solution are as follows: during installation, the mounting platform is first connected to the mounting seat, the output shaft of the power mechanism passes through the first through hole and the second through hole in sequence, and then the positioning piece passes through the positioning hole provided on the second mounting portion and the lower end of the positioning piece is abutted against the flat groove surface on the output shaft of the power mechanism, and then the circular grating is sleeved on the second mounting portion and fixed by the connecting piece, and the circular grating limits the positioning piece in the vertical direction, so that the positioning piece always maintains an abutment state with the output shaft of the power mechanism, thereby ensuring that the mounting platform can rotate with the rotation of the output shaft of the power mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of an embodiment of a circular grating measurement structure used for teaching demonstration of the utility model.

[0019] Figure 2 A schematic diagram of the internal structure of the utility model.

[0020] Figure 3 for Figure 1 Schematic diagram of the structure of the middle mounting seat.

[0021] Figure 4 for Figure 1 Schematic diagram of the structure of the middle bearing.

[0022] Figure 5 for Figure 1 Schematic diagram of the structure of the middle mounting platform.

[0023] Figure 6 This is a schematic diagram of the structure of the installation platform from another angle. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to explain the present invention and will not limit the protection scope of the present invention.

[0025] The terms "first", "second" and the like in the specification, claims and embodiments of the present application are used to distinguish similar objects rather than to describe a specific order or sequential sequence.

[0026] The present invention is further described in detail below through preferred specific embodiments:

[0027] The figure marks in the drawings of the specification include: base 1, mounting seat 2, first through hole 201, first annular step surface 202, fixing hole 2021, fixing part 2022, second annular step surface 203, motor 3, power mechanism output shaft 301, flat groove 3011, reducer 4, circular grating 5, first connecting hole 501, connecting part 502, reading head 6, mounting platform 7, second through hole 701, second connecting hole 702, first mounting part 8, first boss 801, second boss 802, second mounting part 9, positioning hole 901, positioning part 902, bearing 10.

[0028] As attached Figure 1 As shown: a circular grating measurement structure for teaching demonstration in this embodiment includes a base 1 and a mounting base 2 arranged on the base 1, a power mechanism and a measuring component are respectively installed on both sides of the mounting base 2, the power mechanism includes a motor 3 and a reducer 4, the reducer 4 is located on one side of the mounting base 2, the measuring component includes a circular grating 5 arranged at the end of the power mechanism output shaft 301 and a reading head 6 arranged on the mounting base 2 and used for accurately measuring the position of the circular grating 5, the reading head 6 is opposite to the circumference of the circular grating 5, and a plurality of first connecting holes 501 are evenly spaced along the circumference of the circular grating 5, and six of them are preferably arranged in this embodiment.

[0029] As attached Figure 2 and attached Figure 3As shown: the mounting seat 2 is provided with a first through hole 201 for accommodating the output shaft 301 of the power mechanism, the power structure is detachably connected to one side of the mounting seat 2, the reading head 6 is detachably connected to the other side of the mounting seat 2, the circular grating 5 is detachably connected to one end of the output shaft 301 of the power mechanism extending out of the first through hole 201, the mounting seat 2 is provided with a stepped hole connected to the first through hole 201, a first annular step surface 202 and a second annular step surface 203 are formed between the stepped hole and the mounting seat 2, the diameter of the first annular step surface 202 is larger than the diameter of the second annular step surface 203, and a plurality of fixing holes 2021 are provided on the first annular step surface 202 along its circumference.

[0030] As attached Figure 2 , Attachment Figure 5 and attached Figure 6 As shown: a mounting platform 7 is detachably connected to the stepped hole, and a second through hole 701 for the output shaft 301 of the power mechanism is provided on the mounting platform 7 along its axial direction, and a plurality of second connecting holes 702 corresponding to the positions of the first connecting holes 501 are evenly spaced along its circumference, and six are preferably provided in this embodiment, and a first mounting portion 8 and a second mounting portion 9 are respectively provided on both sides of the mounting platform 7, and the first mounting portion 8 matches the stepped hole, and the first mounting portion 8 includes a first boss 801 and a second boss 802 connected in sequence, and the first boss 801 and the second boss 802 match the first annular stepped surface 202 and the second annular stepped surface 203, respectively, as shown in the attached Figure 4 As shown, a bearing 10 is disposed between the first boss 801 and the second annular stepped surface 203 , and the bearing 10 is fixed to the mounting seat 2 by a fixing member 2022 passing through the fixing hole 2021 . In this embodiment, the fixing member 2022 is preferably a screw.

[0031] The circular grating 5 is sleeved on the second mounting portion 9 and fixed through the first connecting hole 501 and the second connecting hole 702 by the connecting member 502. A positioning hole 901 is opened along its radial direction on the second mounting portion 9. A positioning member 902 with a flat lower end face is arranged in the positioning hole 901. In this embodiment, the connecting member 502 and the positioning member 902 are preferably screws. A flat groove 3011 is opened along its axial direction on the outer circular surface of the output shaft 301 of the power mechanism. The lower end of the positioning member 902 is located in the flat groove 3011, and the outer edge of the positioning member 902 is limited by the circular grating 5 sleeved on the second mounting portion 9.

[0032] Specific use process:

[0033] When conducting a teaching demonstration, first install the motor 3 and the reducer 4 to one side of the mounting seat 2, and the power mechanism output shaft 301 passes through the first through hole 201 on the mounting seat 2, and then install the mounting platform 7 to the other side of the mounting seat 2, so that the power mechanism output shaft 301 passes through the second through hole 701 set on the mounting platform 7, specifically, first match the first boss 801 and the second boss 802 on the first mounting portion 8 with the first annular stepped surface 202 and the second annular stepped surface 203 set on one side of the mounting seat 2, and then pass the positioning member 902 through the positioning hole 901 set on the second mounting portion 9 and make the lower end of the positioning member 902 abut against the surface of the flat groove 3011 on the power mechanism output shaft 301, and then the round light The grating 5 is sleeved onto the second mounting portion 9, and the circular grating 5 is fixed on the second mounting portion 9 by means of the connecting member 502 passing through the first connecting hole 501 and the second connecting hole 702. The fixed circular grating 5 limits the positioning member 902 in the radial direction, so that the positioning member 902 always maintains an abutment state with the output shaft 301 of the power mechanism, and then the reading head 6 is installed on the side of the mounting seat 2 where the circular grating 5 is provided, so that the reading head 6 is located directly below the circular grating 5. The rotation of the output shaft 301 of the power mechanism drives the mounting platform 7 to rotate, and the rotation of the mounting platform 7 drives the circular grating 5 to rotate. The rotating circular grating 5 is measured by the reading head 6, thereby measuring the real-time rotation speed and rotation angle of the output shaft 301 of the power mechanism.

[0034] The preferred implementation mode of the present application is described in detail above in conjunction with the accompanying drawings. The typical known structures and common knowledge technologies in the preferred implementation mode are not described in detail here. Ordinary technicians in the relevant field can improve and implement the technical solution of the utility model based on their own abilities under the inspiration given by the present implementation mode. Some typical known structures, known methods or common knowledge technologies should not become obstacles for ordinary technicians in the relevant field to implement the present application.

[0035] The scope of protection required by this application shall be based on the contents of its claims, and the contents of the utility model, specific implementation methods and the contents recorded in the drawings of the specification shall be used to interpret the claims.

[0036] Within the technical concept of the present application, several modifications may be made to the specific implementation methods of the present application, and these modified specific implementation methods should also be regarded as within the protection scope of the present application.

Claims

1. A circular grating measurement structure for teaching demonstration, characterized in that: It includes a base and a mounting seat arranged on the base, a power mechanism and a measuring component are respectively installed on both sides of the mounting seat, the power mechanism includes a motor and a reducer, the reducer is located on one side of the mounting seat, and the mounting seat is provided with a first through hole for accommodating the output shaft of the power mechanism to pass through, and the measuring component includes a circular grating arranged at the end of the output shaft of the power mechanism and a reading head arranged on the mounting seat and used for measuring the position of the circular grating, and the reading head is directly opposite to the circumference of the circular grating.

2. The circular grating measurement structure for teaching demonstration according to claim 1, characterized in that: The power mechanism is detachably connected to one side of the mounting seat, the reading head is detachably connected to the other side of the mounting seat, and the circular grating is detachably connected to one end of the output shaft of the power mechanism extending out of the first through hole.

3. The circular grating measurement structure for teaching demonstration according to claim 1, characterized in that: The mounting seat is provided with a stepped hole connected to the first through hole, a mounting platform is detachably connected to the stepped hole, a second through hole for the output shaft of the power mechanism to pass through is provided on the mounting platform along its axial direction, a first mounting portion and a second mounting portion are provided on both sides of the mounting platform respectively, the first mounting portion matches the stepped hole, and the circular grating is sleeved on the second mounting portion and fixed by a connecting piece.

4. The circular grating measurement structure for teaching demonstration according to claim 3 is characterized in that: A first annular step surface and a second annular step surface are formed between the stepped hole and the mounting seat, the diameter of the first annular step surface is greater than the diameter of the second annular step surface, and the first mounting portion includes a first boss and a second boss connected in sequence, and the first boss and the second boss are matched with the first annular step surface and the second annular step surface respectively.

5. The circular grating measurement structure for teaching demonstration according to claim 4, characterized in that: A bearing is arranged between the first boss and the second annular stepped surface. A plurality of fixing holes are opened on the first annular stepped surface along its circumference. The bearing is fixed to the mounting seat by passing a fixing member through the fixing holes.

6. The circular grating measurement structure for teaching demonstration according to claim 3 is characterized in that: A positioning hole is opened on the second mounting part along its radial direction, and a positioning piece with a flat lower end face is arranged in the positioning hole. A flat groove is opened on the outer circular surface of the output shaft of the power mechanism along its axial direction. The lower end of the positioning piece is located in the flat groove, and the outer edge of the positioning piece is limited by a circular grating sleeved on the second mounting part.

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