CN211288630U - Transmission device and grating adjusting mechanism - Google Patents
Transmission device and grating adjusting mechanism Download PDFInfo
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- CN211288630U CN211288630U CN201921876485.5U CN201921876485U CN211288630U CN 211288630 U CN211288630 U CN 211288630U CN 201921876485 U CN201921876485 U CN 201921876485U CN 211288630 U CN211288630 U CN 211288630U
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- transmission
- driven wheel
- belt
- transmission belt
- grating
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Abstract
The utility model discloses a transmission device and a grating adjusting mechanism, wherein the transmission device comprises a driving wheel, a driven wheel and a transmission belt for connecting the driving wheel and the driven wheel, the driving wheel is driven to rotate by a driving mechanism, and the driving wheel or the driven wheel is also provided with a tensioning adjusting mechanism for adjusting the tension of the transmission belt; the tensioning adjusting mechanism comprises a concave part arranged on the driving wheel or the driven wheel, the part of the transmission belt located at the concave part is sunk in the concave part and is pressed downwards through a pressing part, and the tightness of the transmission belt is adjusted through the distance between the adjusting pressing part and the bottom of the concave part. The grating adjusting mechanism comprises the transmission device. The utility model discloses in, use this transmission can adjust the action wheel and from the tensioning degree of driving belt between the driving wheel, reduce assembly error, and is corresponding, uses this transmission's grating adjustment mechanism, can reduce the empty error of returning, improves the positioning accuracy of grating.
Description
Technical Field
The utility model relates to a drive mechanism, in particular to transmission and grating adjustment mechanism.
Background
At present, most of spectrum and chromatographic analysis instruments need a high-precision and high-stability light splitting system, a grating is a core element of the light splitting system, and the positioning precision and the repetition precision of the grating are related to the quality and the level of the whole analyzer. The wavelength selection required by detection can be realized through the rotation of the grating within a certain range of angles. The existing commonly used grating transmission forms comprise synchronous belt transmission and gear transmission, the synchronous belt transmission is full circle transmission and is influenced by synchronous belt materials and environmental factors, after the grating belt is used for a period of time, the belt body can creep and elongate, so that the back clearance between the belt teeth and the gear teeth is increased, the backlash error is increased, and the positioning precision is reduced; the gear transmission is affected by tooth profile processing and assembly errors, and a small back clearance cannot be realized.
SUMMERY OF THE UTILITY MODEL
In order to solve the deficiencies in the prior art, the utility model aims to provide a transmission and grating adjustment mechanism uses this transmission can adjust the action wheel and from the tensioning degree of driving belt between the driving wheel, reduces assembly error, and is corresponding, uses this transmission's grating adjustment mechanism, can reduce the empty error of returning, improves the positioning accuracy of grating.
The utility model provides a technical scheme that its technical problem adopted does: a transmission device comprises a driving wheel, a driven wheel and a transmission belt connecting the driving wheel and the driven wheel, wherein the driving wheel is driven to rotate by a driving mechanism, and a tension adjusting mechanism for adjusting the tension of the transmission belt is further arranged on the driving wheel or the driven wheel;
the tensioning adjusting mechanism comprises a concave part arranged on the driving wheel or the driven wheel, the part of the transmission belt located at the concave part is sunk in the concave part and is pressed downwards through a pressing part, and the tightness of the transmission belt is adjusted through the distance between the adjusting pressing part and the bottom of the concave part.
Optionally, the side portions of the driving wheel and the driven wheel are provided with grooves for mounting the transmission belt, the depth of the grooves is adapted to the thickness of the transmission belt, and the transmission belt is tightly connected in the grooves.
Optionally, the belt is fastened by bolts.
Optionally, the driving belt is formed by integrally forming two parts, wherein the width of the first part is smaller than that of the second part, and the second part is provided with a strip-shaped through groove, and the width of the through groove is adapted to the width of the first part.
Optionally, the end of the first portion of the transmission belt passes through the through slot and then is fixedly connected to the side of the driven wheel, the end of the second portion of the transmission belt is fixedly connected to the other side of the driven wheel, and a circular portion enclosed between the end of the first portion of the transmission belt and the second portion after passing through the through slot forms a fit with the driving wheel.
Optionally, the fixing position of the first part of the transmission belt on the driven wheel is symmetrically distributed with the fixing position of the second part of the transmission belt on the driven wheel.
Optionally, the edge of the recess has a rounded chamfer.
Adopt above-mentioned technical scheme, the utility model provides a transmission, accessible tensioning adjustment mechanism adjust the rate of tension of drive belt for the drive belt reduces at the action wheel and from the fit-up gap on the driving wheel, thereby the increase assembly compactness of moderate degree reduces transmission's empty error of returning.
The utility model discloses based on foretell transmission, still provide a grating adjustment mechanism, grating adjustment mechanism includes foretell transmission.
Optionally, the grating adjusting mechanism further includes a rotating shaft serving as the rotation center of the driven wheel, the rotating shaft is rotatably connected to a rotating seat, the top of the rotating shaft penetrates through the rotating seat, the grating is fixedly mounted at the top of the rotating shaft, and the bottom of the rotating shaft is fixedly connected with the rotation center of the driven wheel.
Optionally, the grating adjusting mechanism further comprises a photoelectric switch, and the photoelectric switch is fixedly mounted in the middle of the top surface of the driven wheel.
Correspondingly, the utility model provides a grating adjustment mechanism because this grating adjustment mechanism possesses foretell transmission, therefore when adjusting the grating angle, the dead time error that can effectual reduction grating regulation improves the positioning accuracy that the grating was adjusted.
Drawings
Fig. 1 is a schematic structural diagram of a grating adjusting mechanism of the present invention;
fig. 2 is a schematic structural view of a tension adjusting mechanism of the transmission device of the present invention;
fig. 3 is a top view of the grating adjustment mechanism of the present invention;
fig. 4 is a schematic structural view of the transmission belt of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, the utility model discloses a transmission, this transmission include action wheel 1, from driving wheel 2 and connect action wheel 1 and from the drive belt 3 of driving wheel 2, wherein, action wheel 1 passes through the actuating mechanism drive and rotates, for example servo motor 4 in this embodiment, servo motor 4's the direct centre of gyration fixed connection with action wheel 1 of output shaft.
In this embodiment, a tension adjusting mechanism 5 for adjusting the tension of the driving pulley 1 or the driven pulley 2 is further provided.
As shown in fig. 1 and 2, the tension adjusting mechanism 5 includes a concave portion 501 provided on the driving pulley 1 or the driven pulley 2, the concave portion 501 is formed to be concave inward from a side portion of the driving pulley 1 or the driven pulley 2 such that a portion of the belt 3 at the position of the concave portion 501 is recessed within the concave portion 501, and an edge of the concave portion 501 has a rounded chamfer to prevent the belt 3 from being damaged. The tension adjusting mechanism 5 further includes a pressing member 502, and the belt 3 is pressed into the recess 501 by the pressing member 502, so that the tension of the belt 3 is adjusted by adjusting the distance between the pressing member 501 and the bottom of the recess 501.
In order to facilitate the installation of the transmission belt 3, grooves 6 for installing the transmission belt 3 are formed in the side portions of the driving wheel 1 and the driven wheel 2, and the depth of each groove 6 is adapted to the thickness of the transmission belt 3, so that the transmission belt 3 can be tightly connected in each groove 6.
In the present embodiment, as shown in fig. 4, the transmission belt 3 is formed by integrally molding two parts, wherein the width of the first part 301 is smaller than the width of the second part 302, and the second part 302 is provided with an elongated through groove 303, and the width of the through groove 303 is adapted to the width of the first part 301. The whole length of the transmission belt 3 is adapted to the sum of the perimeter of the driving wheel 1 and the length of the area, coated by the transmission belt 3, of the driven wheel 2, so that after the transmission belt 3 is connected with the driving wheel 1 and the driven wheel 2, the driving wheel 1 can be always tangent to the driven wheel 2 when the driven wheel 2 is driven to rotate, and the transmission precision is further improved.
When the transmission belt 3 is assembled with the driving wheel 1 and the driven wheel 2, the end of the first part 301 of the transmission belt 3 passes through the through groove 303 and then is fixedly connected with the side part of the driven wheel 2, the end of the second part 302 of the transmission belt 3 is fixedly connected with the other side part of the driven wheel 2, and the round part enclosed by the end of the first part 301 of the transmission belt 3 and the second part 302 after passing through the through groove 303 is matched with the driving wheel 1. In assembling the drive belt 3, the fixing position of the first part 301 of the drive belt 3 on the driven wheel 2 is symmetrically distributed with respect to the fixing position of the second part 302 of the drive belt 3 on the driven wheel 2.
The effect of the actuator of the present embodiment will be specifically described below in terms of the grating adjustment of the spectrometer or chromatograph.
A spectrometer or a chromatograph, which belongs to a high-precision instrument, has high requirements on the adjustment precision of a grating, so that an adjustment mechanism for driving the grating to adjust the angle has high precision requirements. Therefore, a grating adjusting mechanism is provided, and the transmission device adopted by the grating adjusting mechanism is the transmission device.
In addition, in the present embodiment, in order to meet the high precision requirement of the spectrometer or chromatograph, a flexible steel belt, such as a 304 stainless steel belt, having a thickness of 0.06mm, should be used for the belt 3, thus making it flexible.
Here, the grating adjusting mechanism further includes a rotating shaft 7 serving as a rotation center of the driven wheel 2, the rotating shaft 7 is rotatably connected to a rotating base 8, a top portion of the rotating shaft 7 penetrates through the rotating base 8, and the grating 9 is fixedly installed on the top portion of the rotating shaft 7, and a bottom portion of the rotating shaft 7 is fixedly connected with the rotation center of the driven wheel 2. The driven wheel 2 adopts a sector wheel with an arc-shaped surface at the outer end, so that the driven wheel 2 has a swinging effect when rotating.
In addition, the grating adjusting mechanism further comprises a photoelectric switch 10, the photoelectric switch 10 is fixedly installed in the middle of the top surface of the driven wheel 2, the photoelectric switch 10 is used for sensing the position of the driven wheel 2, so that the servo motor 4 is driven to rotate forwards or backwards, and the swinging angle of the driven wheel is 40 degrees through the arrangement of the photoelectric switch 10.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Besides the technical features described in the specification, other technical features are known to those skilled in the art, and further description of the other technical features is omitted here in order to highlight the innovative features of the present invention.
Claims (10)
1. A transmission device is characterized by comprising a driving wheel, a driven wheel and a transmission belt for connecting the driving wheel and the driven wheel, wherein the driving wheel is driven to rotate by a driving mechanism, and a tension adjusting mechanism for adjusting the tension of the transmission belt is further arranged on the driving wheel or the driven wheel;
the tension adjusting mechanism comprises a concave part arranged on the driving wheel or the driven wheel, the part of the transmission belt located at the concave part is sunk in the concave part and is pressed downwards by the pressing part, and the tension degree of the transmission belt is adjusted by adjusting the distance between the pressing part and the bottom of the concave part.
2. The transmission device as claimed in claim 1, wherein the side portions of the driving pulley and the driven pulley are provided with grooves for mounting the transmission belt, the depth of the grooves is adapted to the thickness of the transmission belt, and the transmission belt is tightly connected in the grooves.
3. Transmission according to claim 2, characterized in that the drive belt is fastened by means of bolts.
4. A transmission according to claim 3 wherein the belt is formed from two parts which are integrally formed, wherein the first part has a width which is less than the width of the second part, and wherein the second part is provided with an elongate through slot having a width which is adapted to the width of the first part.
5. The transmission device as claimed in claim 4, wherein the end of the first part of the transmission belt passes through the through slot and is fixedly connected with the side of the driven wheel, the end of the second part of the transmission belt is fixedly connected with the other side of the driven wheel, and the round part enclosed between the end of the first part of the transmission belt and the second part after passing through the through slot is matched with the driving wheel.
6. A transmission according to claim 5, wherein the attachment location of the first portion of the belt to the driven wheel is symmetrically spaced from the attachment location of the second portion of the belt to the driven wheel.
7. The transmission of claim 6, wherein the edges of the recess have rounded chamfers.
8. A grating adjustment mechanism, characterized in that the grating adjustment mechanism comprises a transmission device according to any one of claims 1 to 7.
9. The grating adjusting mechanism as claimed in claim 8, further comprising a rotating shaft serving as a rotation center of the driven wheel, wherein the rotating shaft is rotatably connected to a rotating base, the top of the rotating shaft passes through the rotating base, and the grating is fixedly mounted on the top of the rotating shaft, and the bottom of the rotating shaft is fixedly connected to the rotation center of the driven wheel.
10. The grating adjustment mechanism of claim 9, further comprising a photoelectric switch fixedly mounted in a middle portion of a top surface of the driven wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921876485.5U CN211288630U (en) | 2019-11-01 | 2019-11-01 | Transmission device and grating adjusting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921876485.5U CN211288630U (en) | 2019-11-01 | 2019-11-01 | Transmission device and grating adjusting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211288630U true CN211288630U (en) | 2020-08-18 |
Family
ID=72022020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921876485.5U Active CN211288630U (en) | 2019-11-01 | 2019-11-01 | Transmission device and grating adjusting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211288630U (en) |
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2019
- 2019-11-01 CN CN201921876485.5U patent/CN211288630U/en active Active
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