CN212320636U - Special door height measuring device for three-axis encoder fume hood - Google Patents
Special door height measuring device for three-axis encoder fume hood Download PDFInfo
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- CN212320636U CN212320636U CN202021368161.3U CN202021368161U CN212320636U CN 212320636 U CN212320636 U CN 212320636U CN 202021368161 U CN202021368161 U CN 202021368161U CN 212320636 U CN212320636 U CN 212320636U
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- encoder
- measuring device
- chucking
- fixedly connected
- height measuring
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Abstract
The utility model relates to a fume chamber door height measures technical field, and discloses special door height measuring device of triaxial encoder fume chamber, which comprises an outer shell, the fixed solid-state support that is provided with of bottom inner wall of shell, the bull stick has been rotated through ball bearing to surface one side of solid-state support and shell, the lower extreme of bull stick runs through the lower extreme and the fixedly connected with sprocket that stretch out the shell, it has cabinet door chain to transmit on the sprocket, the bull stick is located the fixed boss pinion that has cup jointed of pole wall in the solid-state support, the upper end of solid-state support is still fixed the joint and is had rotatory photoelectric encoder, rotatory photoelectric encoder's lower extreme runs through the surface and the driven gear wheel of fixedly connected with of solid-state support, boss pinion and driven gear engagement are connected. The utility model discloses can provide practical, economy, accurate and durable window door displacement measuring device for fume chamber VAV control system.
Description
Technical Field
The utility model relates to a fume chamber door height measures technical field, especially relates to special door height measuring device of triaxial encoder fume chamber.
Background
At present, the known laboratory fume hood door height measuring device is measured by an absolute value stay wire displacement sensor, the sensor is installed on a fume hood, a stay wire is fixed on a counter weight of a cabinet door, the sensor stay wire changes along with expansion when the cabinet door is pulled, the stay wire displacement sensor outputs a voltage (0-10V) or current (4-20mA) signal through a potentiometer, and the height of the cabinet door is read through program conversion. Because the internal core element of the pull wire displacement sensor is the potentiometer, the contact surface of the potentiometer slides and rubs in the using process, the potentiometer is extremely easy to damage in frequent use, the service life is short, and the failure rate is high.
At present, a stay wire encoder displacement sensor is used for measurement, sliding friction of a contact surface of a potentiometer is avoided, the fault rate is low, an absolute reference point is not provided, and after power failure at each time, a cabinet door is changed and needs to be calibrated again, so that the stay wire encoder displacement sensor is not suitable for a ventilation cabinet.
At present, the absolute value stay wire encoder displacement sensor can be used for solving the defects of the two sensors, but the price is very high, the current market price is about 1500 yuan/platform, the influence on the manufacturing cost is large when the absolute value stay wire encoder displacement sensor is applied to a VAV of a fume hood, and the application range is limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving among the prior art inside core element of stay wire displacement sensor and being the potentiometre, the potentiometre contact surface sliding friction in the use, very fragile in frequent use, life is short, the higher problem of fault rate, and the special door height measuring device of triaxial encoder fume chamber that provides.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
special door height measuring device of triaxial encoder fume chamber, which comprises an outer shell, the fixed solid state support that is provided with of bottom inner wall of shell, the bull stick has been cup jointed through ball bearing rotation in the surperficial one side of solid state support and shell, the lower extreme of bull stick runs through the lower extreme and the fixedly connected with sprocket that stretch out the shell, it has cabinet door chain to transmit on the sprocket, the pole wall that the bull stick is located solid state support is fixed to be cup jointed the boss pinion, the upper end of solid state support still fixed joint has rotatory photoelectric encoder, the lower extreme of rotatory photoelectric encoder runs through the surface and the driven gear wheel of fixedly connected with of solid state support, boss pinion and driven gear wheel meshing are connected.
Preferably, the fixed spiral shell section of thick bamboo outside rotatory photoelectric encoder is established to the upper end fixedly connected with cover of solid state support, the fixed positioning spiral ring that has threaded connection in fixed spiral shell section of thick bamboo that has cup jointed of the lower extreme outer wall of rotatory photoelectric encoder, through the fixed joint of a plurality of chucking mechanisms that the symmetry set up between fixed spiral shell section of thick bamboo and the positioning spiral ring.
Preferably, chucking mechanism is including rotating the pivot of connection at fixed spiral shell outer wall, the chucking clamp plate of the upper end fixedly connected with crimping in the spiral shell upper end of location of pivot, jack and jack internalization are seted up on the surface of chucking clamp plate and are inserted and be equipped with the chucking inserted bar, the chucking slot of pegging graft is seted up with the chucking inserted bar correspondence to the upper end of spiral shell of location, the upper end fixedly connected with arm-tie of chucking inserted bar, the chucking spring outside the chucking inserted bar is established to the lower extreme of arm-tie and the same cover of upper end fixedly connected with of chucking clamp plate.
Preferably, the outer wall of the fixed screw cylinder is fixedly connected with a bearing seat, and the bearing seat is internally sleeved outside the rotating shaft through a ball bearing in a rotating manner.
Preferably, the lower side of the clamping pressing plate is fixedly connected with a layer of damping rubber pad.
Preferably, the rotary photoelectric encoder is an ABZ three-phase encoder.
Preferably, the gear transformation ratio of the driven gearwheel and the boss pinion is set to be a ratio that the driven gearwheel can rotate no more than two circles in the process of opening a cabinet door by a complete stroke.
Compared with the prior art, the utility model provides a special door height measuring device of triaxial encoder fume chamber possesses following beneficial effect:
1. the special door height measuring device for the three-axis encoder ventilating hood drives the rotating rod to rotate by utilizing the transmission matching of the chain wheel and the chain of the cabinet door, further drives the boss pinion to synchronously rotate, then drives the driven bull gear to rotate by the meshing action of the boss pinion and the driven bull gear, the driven bull gear drives the rotary photoelectric encoder to rotate, the rotary photoelectric encoder adopts an ABZ three-phase encoder, the A phase and the B phase are used for counting in positive and negative rotation, the Z phase reference point realizes self-resetting self-calibration, the bull gear rotates for no more than two circles in the process of opening a complete stroke of the cabinet door by calculating and selecting the change ratio of the big gear and the small gear, thus the Z phase of the rotary photoelectric encoder can be triggered only once, the self-resetting self-calibration is realized, the moving distance of the cabinet door can be calculated by multiplying the rotating circle number of the rotary photoelectric encoder by the change, in the VAV control circuit board, reading the encoder pulse signal and the calibration point photoelectric signal through a PLC program, calculating the change of the door displacement through the program, in the VAV control circuit board, reading the encoder pulse signal and the calibration point photoelectric signal through the PLC program, calculating the change of the door displacement through the program, adopting a three-axis photoelectric encoder, having no sliding friction of a contact surface of a potentiometer, having low failure rate, simultaneously adding a group of gear mechanisms in the mechanism to realize self-resetting and self-calibration, completely replacing an absolute value stay wire encoder displacement sensor by functions, greatly reducing the comprehensive cost, even being lower than the potentiometer type stay wire displacement sensor commonly used at present, and having convenient installation, long service life and low failure rate.
2. This special door height measuring device of triaxial encoder fume chamber, through the fixed screw section of thick bamboo and the location spiro union that is equipped with, can fix rotatory photoelectric encoder in the upper end of solid-state support fast, rotate the pivot again, and then make the chucking clamp plate rotate to the upside of location spiro union, it is spacing to the firm of location spiro union to realize realizing, the chucking slot is aimed at to the chucking inserted bar this moment, chucking spring pull-down plate, the pull-down plate can realize the firm spacing to the chucking clamp plate in advancing the chucking slot with the chucking inserted bar, make placing of rotatory photoelectric encoder firm, and convenient to use.
And the part that does not relate to in the device all is the same with prior art or can adopt prior art to realize, the utility model discloses can provide practical, economy, accurate and durable window door displacement measuring device for fume chamber VAV control system.
Drawings
Fig. 1 is a schematic structural view of a height measuring device for a three-axis encoder fume chamber door of the present invention;
fig. 2 is the utility model provides a structural schematic diagram of special door height measuring device A part of triaxial encoder fume chamber.
In the figure: the device comprises a shell 1, a solid support 2, a rotating rod 3, a chain wheel 4, a cabinet door chain 5, a boss pinion 6, a rotary photoelectric encoder 7, a driven bull gear 8, a fixed screw cylinder 9, a positioning screw ring 10, a rotating shaft 11, a clamping pressing plate 12, a clamping insertion rod 13, a clamping insertion groove 14, a pulling plate 15, a clamping spring 16 and a bearing seat 17.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Referring to fig. 1-2, special door height measuring device of triaxial encoder fume chamber, including shell 1, the fixed solid state support 2 that is provided with of bottom inner wall of shell 1, solid state support 2 and shell 1's surface one side has cup jointed bull stick 3 through ball bearing rotation, the lower extreme of bull stick 3 runs through the lower extreme and the fixedly connected with sprocket 4 that stretch out shell 1, it has cabinet door chain 5 to transmit around having connect on sprocket 4, bull stick 3 is located the fixed boss pinion 6 that has cup jointed of pole wall of solid state support 2, the upper end of solid state support 2 still fixes the joint has rotatory photoelectric encoder 7, the lower extreme of rotatory photoelectric encoder 7 runs through the surface of solid state support 2 and fixedly connected with driven gear wheel 8, boss pinion 6 and the meshing of driven gear wheel 8 are connected.
The upper end of the solid support 2 is fixedly connected with a fixed screw cylinder 9 sleeved outside the rotary photoelectric encoder 7, the outer wall of the lower end of the rotary photoelectric encoder 7 is fixedly sleeved with a positioning screw ring 10 in threaded connection with the fixed screw cylinder 9, and the fixed screw cylinder 9 and the positioning screw ring 10 are fixedly clamped through a plurality of clamping mechanisms which are symmetrically arranged.
The clamping mechanism comprises a rotating shaft 11 rotatably connected to the outer wall of the fixed screw barrel 9, a clamping pressing plate 12 is fixedly connected to the upper end of the rotating shaft 11 and is in press connection with the upper end of the positioning screw ring 10, jacks are formed in the surface of the clamping pressing plate 12, clamping insertion rods 13 are movably inserted in the jacks, clamping insertion grooves 14 correspondingly inserted with the clamping insertion rods 13 are formed in the upper end of the positioning screw ring 10, pull plates 15 are fixedly connected to the upper ends of the clamping insertion rods 13, and clamping springs 16 sleeved outside the clamping insertion rods 13 are fixedly connected to the lower ends of the pull plates 15 and the upper ends of the clamping pressing plate 12.
The outer wall fixedly connected with bearing frame 17 of fixed spiral shell section of thick bamboo 9, rotate through ball bearing in the bearing frame 17 and cup joint outside pivot 11.
A layer of damping rubber pad is fixedly connected to the lower side of the clamping pressing plate 12.
The rotary photoelectric encoder 7 specifically adopts an ABZ three-phase encoder.
The gear transformation ratio of the driven gearwheel 8 and the boss pinion 6 is set to be a ratio that the driven gearwheel 8 can rotate no more than two circles in the process of opening a cabinet door by a complete stroke.
In the utility model, when in use, the rotating rod 3 is driven to rotate by the transmission coordination of the chain wheel 4 and the cabinet door chain 5, the boss pinion 6 is driven to synchronously rotate, the driven gearwheel is driven to rotate by the meshing action of the boss pinion 6 and the driven gearwheel 8, the driven gearwheel 8 drives the rotary photoelectric encoder 7 to rotate, the rotary photoelectric encoder 7 adopts an ABZ three-phase encoder, the A phase and the B phase are used for positive and negative rotation counting, the Z phase reference point realizes self-resetting self-calibration, the gear wheel rotates for no more than two circles in the process of opening a complete stroke of the cabinet door by calculating and selecting the large gear ratio and the small gear ratio of the driven gearwheel 8 and the boss pinion 6, thus the Z phase of the rotary photoelectric encoder 7 can only trigger once self-calibration, the self-resetting is realized, the rotating circle number of the rotary shaft of the rotary photoelectric encoder 7 is multiplied by the transformation ratio of the large gear and the small, in the VAV control circuit board, reading the encoder pulse signal and the calibration point photoelectric signal through a PLC program, calculating the change of the door displacement through the program, in the VAV control circuit board, reading the encoder pulse signal and the calibration point photoelectric signal through the PLC program, calculating the change of the door displacement through the program, adopting a three-axis photoelectric encoder, having no sliding friction of a contact surface of a potentiometer and low failure rate, simultaneously adding a group of gear mechanisms in the mechanism to realize self-resetting and self-calibration, completely replacing an absolute value pull-cord encoder displacement sensor with the function, greatly reducing the comprehensive manufacturing cost, even being lower than the potentiometer type pull-cord displacement sensor commonly used at present, having convenient installation, long service life and low failure rate, being capable of rapidly fixing the rotary photoelectric encoder 7 at the upper end of the solid bracket 2 through a fixed screw cylinder 9 and a positioning screw ring 10, and then rotating a rotating shaft 11, and then make chucking clamp plate 12 rotate to the upside of location spiro ring 10, realize fixing and spacing to location spiro ring 10, chucking inserted bar 13 aims at chucking slot 14 this moment, and chucking spring 16 drop-down arm-tie 15, arm-tie 15 impel chucking inserted bar 13 in chucking slot 14 can realize fixing and spacing to chucking clamp plate 12 for placing of rotary photoelectric encoder 7 is firm, convenient to use.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. The special door height measuring device for the three-axis encoder fume hood comprises a shell (1) and is characterized in that, a solid support (2) is fixedly arranged on the inner wall of the bottom of the shell (1), a rotating rod (3) is rotatably sleeved on the solid support (2) and one side of the surface of the shell (1) through a ball bearing, the lower end of the rotating rod (3) penetrates through the lower end of the outer shell (1) and is fixedly connected with a chain wheel (4), a cabinet door chain (5) is wound on the chain wheel (4), a boss pinion (6) is fixedly sleeved on the rod wall of the rotating rod (3) positioned in the solid bracket (2), the upper end of the solid bracket (2) is also fixedly clamped with a rotary photoelectric encoder (7), the lower end of the rotary photoelectric encoder (7) penetrates through the surface of the solid support (2) and is fixedly connected with a driven bull gear (8), the boss small gear (6) is meshed with the driven large gear (8).
2. The special door height measuring device for the three-axis encoder ventilation cabinet according to claim 1, wherein a fixed screw cylinder (9) outside the rotary photoelectric encoder (7) is sleeved with the upper end of the solid support (2), a positioning screw cylinder (10) in the fixed screw cylinder (9) is screwed with the outer wall of the lower end of the rotary photoelectric encoder (7), and the fixed screw cylinder (9) and the positioning screw cylinder (10) are fixedly clamped through a plurality of clamping mechanisms symmetrically arranged.
3. The special door height measuring device of triaxial encoder fume chamber according to claim 2, characterized in that, chucking mechanism includes pivot (11) of rotation connection at fixed screw section of thick bamboo (9) outer wall, the upper end fixedly connected with crimping of pivot (11) is at chucking clamp plate (12) of location spiro (10) upper end, jack and jack internalization are seted up on the surface of chucking clamp plate (12) and are inserted and be equipped with chucking inserted bar (13), the upper end of location spiro (10) is seted up and is corresponded chucking slot (14) of pegging graft with chucking inserted bar (13), the upper end fixedly connected with arm-tie (15) of chucking inserted bar (13), the lower extreme of arm-tie (15) and the upper end fixedly connected with cover of chucking clamp plate (12) are established at chucking spring (16) outside same chucking inserted bar (13).
4. The special door height measuring device for the three-axis encoder ventilation cabinet according to claim 3, wherein a bearing seat (17) is fixedly connected to the outer wall of the fixed screw cylinder (9), and the bearing seat (17) is rotatably sleeved outside the rotating shaft (11) through a ball bearing.
5. The special door height measuring device for the three-axis encoder fume hood as claimed in claim 3, wherein a layer of damping rubber pad is fixedly connected to the lower side of the clamping pressing plate (12).
6. The special door height measuring device for the three-axis encoder fume hood according to claim 1, wherein the rotary photoelectric encoder (7) is an ABZ three-phase encoder.
7. The door height measuring device special for the triaxial encoder fume hood as claimed in claim 1, wherein the gear transformation ratio of the driven gearwheel (8) and the boss pinion (6) is set to a ratio that the driven gearwheel (8) can rotate no more than two revolutions during one complete stroke of opening the cabinet door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021368161.3U CN212320636U (en) | 2020-07-13 | 2020-07-13 | Special door height measuring device for three-axis encoder fume hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021368161.3U CN212320636U (en) | 2020-07-13 | 2020-07-13 | Special door height measuring device for three-axis encoder fume hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212320636U true CN212320636U (en) | 2021-01-08 |
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ID=74027121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021368161.3U Expired - Fee Related CN212320636U (en) | 2020-07-13 | 2020-07-13 | Special door height measuring device for three-axis encoder fume hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212320636U (en) |
-
2020
- 2020-07-13 CN CN202021368161.3U patent/CN212320636U/en not_active Expired - Fee Related
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210108 |
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| CF01 | Termination of patent right due to non-payment of annual fee |