CN220265017U - Rotary wheel adjusting structure of rotary limit switch and rotary limit switch - Google Patents

Abstract

The utility model provides a rotary limit switch rotary wheel adjusting structure and a rotary limit switch. The rotary limiting switch rotary wheel adjusting structure comprises a transmission shaft, a rotary wheel set, an adjusting structure and an instrument panel structure; the rotating wheel set is arranged on the transmission shaft; the instrument panel structure, the adjusting structure and the rotating wheel group are sequentially connected in a transmission way; the rotating wheel group comprises a plurality of rotating wheels; the instrument panels comprise subdivision adjustment dials and rough subdivision adjustment dials; the adjusting structure comprises a subdivision adjusting gear, a rough subdivision adjusting gear, a subdivision adjusting shaft and a rough subdivision adjusting shaft; according to the utility model, through the arrangement of the two gears of the fine-division adjusting gear and the coarse-division adjusting gear, the two-stage adjusting gear transmission is realized, and the variable speed transmission of the rotary wheel disc is realized, so that the two-stage accurate adjustment of the rotary wheel disc is completed. Coarse adjustment can be achieved through the first-stage adjusting gear, fine adjustment can be achieved through the second-stage adjusting gear, and the two-stage adjusting mode can remarkably improve adjusting accuracy.

Description

Rotary wheel adjusting structure of rotary limit switch and rotary limit switch

Technical Field

The utility model relates to the field of cranes, in particular to a rotary wheel adjusting structure of a rotary limit switch and the rotary limit switch.

Background

As a large-load hoisting machine, the crane is widely applied to heavy industrial enterprises, and the rotary cam limit is a necessary safety detection limit of the crane, so that the crane has a critical effect on the safety of the crane. In other mechanical devices, the rotary cam limit has also been widely used. The rotary cam limit mainly uses the detection safety position as a main function, and plays a vital role in the safe operation of mechanical equipment such as a crane.

The rotary cam limiting commonly used in the current market takes a cam plate as a main body, and the rotary cam plate touches the micro switch to enable the micro switch to act, so that a safety interlocking signal is provided for application equipment, and the safe operation of the application equipment is ensured.

The current adjustment mode of the limit of the rotary cam is quite unfriendly, the limit of the rotary cam is adjusted by adjusting the position of the cam plate, the adjustment structure of the current cam plate basically utilizes a single-stage structure and directly adjusts the cam plate, and the position of the cam plate is adjusted without a fine adjustment structure, so that the precise adjustment of a safety linkage position is difficult, the phenomenon of over-adjustment or under-adjustment usually occurs, the error range is quite large, and the safety linkage position is completely deviated from an ideal position.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a rotary wheel adjusting structure of a rotary limit switch and the rotary limit switch.

The utility model provides a rotary wheel adjusting structure of a rotary limit switch, which comprises a transmission shaft, a rotary wheel group, an adjusting structure and an instrument panel structure;

the rotating wheel set is arranged on the transmission shaft; the instrument panel structure, the adjusting structure and the rotating wheel group are sequentially connected in a transmission way;

the rotating wheel group comprises a plurality of rotating wheels;

the instrument panel structure comprises a plurality of instrument panel groups, wherein each instrument panel group comprises a plurality of instrument panels and a rotary wheel indication mark; the single-way instrument panel group corresponds to one adjusting structure one by one;

the instrument panels comprise subdivision adjustment dials and rough subdivision adjustment dials;

the adjusting structure comprises a subdivision adjusting gear, a rough subdivision adjusting gear, a subdivision adjusting shaft and a rough subdivision adjusting shaft; the subdivision adjusting gear is arranged on the subdivision adjusting shaft, and the subdivision adjusting gear and the subdivision adjusting shaft synchronously rotate; the rough-separation adjusting gear is arranged on the rough-separation adjusting shaft and synchronously rotates with the rough-separation adjusting shaft; the subdivision adjusting gear, the coarse subdivision adjusting gear and the rotating wheel are meshed in sequence;

the subdivision adjusting dial plate and the rough subdivision adjusting dial plate are respectively arranged at the end part of the subdivision adjusting shaft and the end part of the rough subdivision adjusting shaft;

the subdivision adjustment dial is internally provided with a subdivision adjustment pointer, and the subdivision adjustment pointer can drive the subdivision adjustment shaft to rotate;

a rough-separation adjusting pointer is arranged in the rough-separation adjusting dial plate; the rough-separation adjusting pointer can drive the rough-separation adjusting shaft to rotate.

Preferably, the subdivision adjustment dial plate is a 1-degree subdivision adjustment dial plate; the rough-division adjusting dial plate is 30 degrees;

the subdivision adjusting gear is a 1-degree subdivision adjusting gear; the rough-separation adjusting gear is a 30-degree rough-separation adjusting gear;

the subdivision adjusting shaft is a 1-degree subdivision adjusting shaft, and the coarse-division adjusting shaft is a 30-degree coarse-division adjusting shaft.

Preferably, the subdivision adjusting gear is a single-layer gear;

the rough-separation adjusting gear is a large-small double-layer gear;

the subdivision adjusting gear is meshed with a large gear of the rough-division adjusting gear, and a small gear of the rough-division adjusting gear is meshed with the rotating wheel.

Preferably, the middle of the fine division adjusting pointer and the rough division adjusting pointer are respectively provided with an adjusting hole, and an operator can rotate the fine division adjusting pointer and the rough division adjusting pointer through the adjusting holes.

Preferably, the instrument panel structure further comprises an instrument bin, and the instrument panel structure is positioned in the instrument bin.

Preferably, the instrument panel group is 12 paths;

the 12 instrument panel groups are vertically and symmetrically arranged on two sides of the center of the instrument panel by using an instrument bin, 6 instrument panel groups on each side are circumferentially arranged by using a transmission shaft as the center, the initial angle of the central line of the upper instrument panel group of the instrument panel groups on two sides is 50 degrees, and the interval angle of the central lines of the adjacent instrument panel groups on the same side is 20 degrees.

Preferably, the rotary wheel is provided with wheel disc scales;

the scale indicator support is installed at the rotary wheel group top, installs a plurality of scale indicators on the scale indicator support, and the rotation angle of rotary wheel can be instructed to the scale on single rotary wheel disk of single scale indicator cooperation.

Preferably, the device also comprises a transmission shaft locking ring, a fastening ring, an intermediate rotating wheel locking ring and a tail rotating wheel locking ring;

the head part of the transmission shaft is provided with a transmission shaft locking ring; an intermediate rotary wheel locking ring is arranged between the front end of the head rotary wheel and each rotary wheel, and the tail end of the tail rotary wheel is provided with a tail rotary wheel locking ring;

the transmission shaft locking ring is tightly clung to the middle rotary wheel locking ring of the head part, the tail part of the transmission shaft is movably provided with a fastening ring, and the fastening ring can move along the length direction of the transmission shaft.

Preferably, anti-slip protrusions are processed on two sides of the locking ring of the middle rotating wheel, and anti-slip protrusions are processed on one side of the locking ring of the tail rotating wheel;

the anti-skid grooves are circumferentially arranged in the central holes of the rotating wheels, and the anti-skid protrusions can be matched with the anti-skid grooves;

key grooves are formed in the middle rotary wheel locking ring and the tail rotary wheel locking ring;

a plurality of locking keys are uniformly arranged on the transmission shaft and can be matched with key grooves on the middle rotary wheel locking ring and key grooves on the tail rotary wheel locking ring.

According to the rotary limit switch provided by the utility model, the rotary wheel adjusting structure of the rotary limit switch is adopted.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, through the arrangement of the two gears of the fine-division adjusting gear and the coarse-division adjusting gear, the two-stage adjusting gear transmission is realized, and the variable speed transmission of the rotary wheel disc is realized, so that the two-stage accurate adjustment of the rotary wheel disc is completed. Coarse adjustment can be achieved through the first-stage adjusting gear, fine adjustment can be achieved through the second-stage adjusting gear, and the two-stage adjusting mode can remarkably improve adjusting accuracy.

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:

FIG. 1 is an overall block diagram of a rotary limit switch, in which a rotary wheel adjustment structure of the rotary limit switch is embodied;

FIG. 2 is a schematic diagram of an instrument panel arrangement of the adjustment bin;

FIG. 3 is a diagram of a 6 th instrument panel arrangement;

FIG. 4 is a schematic diagram of a rotating wheel structure;

FIG. 5 is a schematic side view of a rotating wheelset configuration;

FIG. 6 is a schematic bottom view of a rotating wheelset configuration;

FIG. 7 is a schematic diagram of two views of an intermediate rotary wheel locking ring of a rotary limit switch;

FIG. 8 is a schematic diagram of a three-view of a tail rotor locking ring of a rotary limit switch;

FIG. 9 is a schematic diagram of two views of a sensor holder of a rotary limit switch;

FIG. 10 is a partial structural side view of a rotary limit switch;

FIG. 11 is a schematic view of a partial structure of a rotary limit switch;

FIG. 12 is a schematic view of a scale indicator from two sides;

FIG. 13 is a block diagram of the input shaft of the rotary limit switch;

FIG. 14 is a block diagram of a drive shaft;

fig. 15 is a circuit diagram of a rotary limit switch.

The figure shows:

Detailed Description

The present utility model will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present utility model.

The utility model provides a rotary wheel adjusting structure of a rotary limit switch, which comprises a transmission shaft 1, a rotary wheel set 2, an adjusting structure and an instrument panel structure; the rotating wheel set 2 is arranged on the transmission shaft 1; the instrument panel structure, the adjusting structure and the rotating wheel set 2 are sequentially connected in a transmission way; the rotating wheel set 2 comprises a plurality of rotating wheels 3; the instrument panel structure comprises a plurality of instrument panel groups 4, wherein each instrument panel group comprises a plurality of instrument panels 5 and a rotary wheel indication mark 6; the number of the instrument panels 5 is 2, and the instrument panels are respectively a subdivision adjustment dial 51 and a rough subdivision adjustment dial 52; the single-way instrument panel group corresponds to one adjusting structure one by one.

The adjusting structure comprises a subdivision adjusting gear 7, a rough subdivision adjusting gear 8, a subdivision adjusting shaft 9 and a rough subdivision adjusting shaft 10; the subdivision adjusting gear 7 is mounted on the subdivision adjusting shaft 9, and the subdivision adjusting gear 7 rotates in synchronization with the subdivision adjusting shaft 9; the rough-separation adjusting gear 8 is mounted on the rough-separation adjusting shaft 10, and the rough-separation adjusting gear 8 rotates in synchronization with the rough-separation adjusting shaft 10; the subdivision adjusting gear 7, the rough subdivision adjusting gear 8 and the rotating wheel 3 are meshed in sequence;

the subdivision adjustment dial 51 and the rough subdivision adjustment dial 52 are respectively mounted at the end of the subdivision adjustment shaft 9 and the end of the rough subdivision adjustment shaft 10; a subdivision adjustment pointer 511 is arranged in the subdivision adjustment dial 51, and the subdivision adjustment pointer 511 can drive the subdivision adjustment shaft 9 to rotate; the subdivision adjusting gear 7 can thus be driven to rotate, so that the rotary wheel 3 is rotated.

A rough adjustment pointer 521 is arranged in the rough adjustment dial 52; the rough adjustment pointer 521 can drive the rough adjustment shaft 10 to rotate; the rough adjusting gear 8 can thus be driven to rotate, thereby realizing the rotation of the rotating wheel 3.

The rotary wheel 3 is provided with wheel disc scales. The scale indicator bracket 18 is installed at the top of the rotating wheel group 2, a plurality of scale indicators 181 are installed on the scale indicator bracket 18, each scale indicator corresponds to one rotating wheel 3 one by one, the scale indicators are triangular metal sheets, and the scale indicators are matched with scales on a rotating wheel 3 disc to indicate the rotating angle of the rotating wheel 3.

The subdivision adjustment dial 51 is a 1-degree subdivision adjustment dial; the rough adjustment dial 52 is a 30-degree rough adjustment dial; the subdivision adjusting gear 7 is a 1-degree subdivision adjusting gear; the rough-separation adjusting gear 8 is a 30-degree rough-separation adjusting gear; the subdivision adjustment axis 9 is a 1-degree subdivision adjustment axis, and the coarse subdivision adjustment axis 10 is a 30-degree coarse subdivision adjustment axis 10.

The subdivision adjusting gear 7 is a single-layer gear, the number of teeth is 10, and the modulus is 0.5; the rough-separation adjusting gear 8 is a large-small double-layer gear, the number of teeth of the large gear is 30 teeth, the modulus is 0.5, the number of teeth of the small gear is 10 teeth, and the modulus is 0.5. The subdivision adjusting gear 7 is meshed with a large gear of the rough-division adjusting gear 8, and a small gear of the rough-division adjusting gear 8 is meshed with the rotating wheel 3.

The fine adjustment pointer 511 and the rough adjustment pointer 521 are provided with adjustment holes in the middle, and an operator can rotate the fine adjustment pointer 511 and the rough adjustment pointer 521 through the adjustment holes. In a preferred embodiment, the adjusting hole is a square hole, and an operator can rotate the 1-degree fine-division adjusting pointer or the 30-degree coarse-division adjusting pointer by matching the square hole through a 1-shaped screwdriver, so that the adjustment of the rotating wheel 3 is realized. Thereby realizing the adjustment of the interlocking position of the rotary limit switch. The accurate angle adjustment can be realized by matching with the scales of the instrument panel. On the contrary, when the rotary limit switch works, the rotary wheel 3 can drive the rotation of the 1-degree subdivision adjusting pointer and the 30-degree coarse-division adjusting pointer along with the rotation of the transmission shaft, and the corresponding rotary wheel 3 rotation angle can be indicated by matching with the indication mark of the rotary wheel set 2, so that the record and the reference are facilitated.

The rotary limit switch rotary wheel adjusting structure further comprises an instrument bin 11, and the instrument panel structure is located in the instrument bin 11. In a preferred embodiment, the rotating wheels 3 are in a gear structure, the number of the rotating wheels 3 is 12, the 12 rotating wheels 3 are all sleeved on the transmission shaft 1, the instrument panel sets 4 are 12 paths, the 12 paths of instrument panel sets 4 are vertically and symmetrically arranged on two sides of the center of the instrument bin on the instrument panel, 6 instrument panel sets on each side are circumferentially arranged on the center of the transmission shaft, the initial angle of the center line of the upper instrument panel set 4 of each instrument panel set 4 on each side is 50 degrees, the interval angle of the center lines of the adjacent instrument panel sets 4 on the same side is 20 degrees, and at the moment, the number of the adjusting structures is also 12.

Specifically, 10 big scales are altogether processed on the 1-degree subdivision adjustment dial plate, the big scales are distributed at the edge position of the 1-degree subdivision adjustment dial plate at equal intervals, each big scale represents 1 degree, scale reading numbers are processed on even number big scale positions, 5 small scales are processed between every two big scales, the big scales are distributed at equal intervals, and each small scale represents 0.2 degree. The 1-degree subdivision adjustment dial further includes a 1-degree subdivision adjustment pointer for indicating the adjustment position. The 30-degree rough-separation adjustment dial plate is provided with 30 scales, the scales are distributed at the edge position of the 30-degree rough-separation adjustment dial plate at equal intervals, each scale represents 1 degree, scale reading numbers are processed at the scale positions of 0 degree, 10 degrees and 20 degrees, and the 30-degree rough-separation adjustment dial plate further comprises 30-degree rough-separation adjustment pointers. The rotary wheel set 2 indication mark is processed with a digital mark of the rotary wheel set 2 group. More specifically, the speed ratio of the 30-degree rough-separation adjusting gear to the rotating wheel 3 is 12: the ratio of the 1,1 degree subdivision regulating gear to the 30 degree coarse subdivision regulating gear is 3:1. thus, the 30-degree rough adjusting gear rotates 1 degree, the rotating wheel 3 rotates 1/30 degree, and the 1-degree fine adjusting gear rotates 1 degree, and the rotating wheel 3 rotates 1/10 degree. The minimum scale of the 1-degree subdivision adjustment dial plate is 0.2 degrees, so that the accurate adjustment precision of the 1-degree subdivision adjustment gear can reach 0.2 degrees, and the estimated reading can reach 0.1 degrees.

The rotary limit switch rotary wheel adjusting structure further comprises a middle rotary wheel locking ring 32 and a tail rotary wheel locking ring 33. An intermediate rotary wheel locking ring 32 is arranged between the front end of the head rotary wheel 3 and each group of rotary wheels 3, and a tail rotary wheel locking ring 33 is arranged at the tail end of the tail rotary wheel 3. The 12 rotating wheels 3, the middle rotating wheel locking ring 32 and the tail rotating wheel locking ring 33 are concentrically arranged on the transmission shaft 1, the head part of the transmission shaft 1 is provided with the transmission shaft locking ring 16, the transmission shaft locking ring 16 is tightly attached to the middle rotating wheel locking ring 32 at the head part, and the tail part of the transmission shaft is provided with the fastening ring 17. The tail of the transmission shaft is provided with external threads, the fastening ring 17 is provided with internal threads which are matched with the threads of the tail of the transmission shaft, and the fastening ring 17 can be screwed on the transmission shaft. The fastening ring 17 can be tightly attached to the tail rotary wheel locking ring 33 when the fastening ring 17 is screwed on the transmission shaft, the middle rotary wheel locking ring 32, the rotary wheel set 2 and the tail rotary wheel locking ring 33 are fastened together when the fastening ring 17 is screwed, and specifically, when the fastening ring 17 is screwed on, the fastening ring 17 compresses the tail rotary wheel locking ring 33, so that the middle rotary wheel locking ring 32 and the rotary wheel set 2 of the tail rotary wheel locking ring 33 are compressed together. The whole body formed by the middle rotary wheel locking ring 32 of the tail rotary wheel locking ring 33, the middle rotary wheel locking ring 32 of the rotary wheel set 2, the rotary wheel set 2 and the tail rotary wheel locking ring 33 is also fastened together with the transmission shaft 1, so that the rotary wheel set 2 and the transmission shaft 1 can move together.

Specifically, the two sides of the locking ring 32 of the middle rotating wheel are provided with the anti-slip protrusions 321, the locking ring 33 of the tail rotating wheel is provided with the anti-slip protrusions 321 on one side, one side with the anti-slip protrusions is clung to the rotating wheel 3 during installation, more specifically, the central hole of the rotating wheel 3 is circumferentially provided with the anti-slip grooves 324, and the anti-slip protrusions 321 can be matched with the anti-slip grooves 324. The intermediate swivel locking ring 32 and the tail swivel locking ring 33 are also machined with keyways 322. A plurality of locking keys 323 are uniformly machined in the middle of the transmission shaft 1, preferably, the number of the locking keys 323 is 13, the locking keys 323 can be matched with key grooves of the middle rotary wheel locking ring 32 and the tail rotary wheel locking ring 33, and the middle rotary wheel locking ring 32 and the tail rotary wheel locking ring 33 can only slide along the axial direction of the transmission shaft but cannot rotate along the transmission shaft. The swivel wheel 3 is mounted in the middle of the two locking keys of the drive shaft, so that when the fastening ring 17 is released, the swivel wheel 3 can rotate freely along the drive shaft without affecting the other swivel wheels 3.

When the anti-slip boss 321 is matched with the anti-slip groove 324 to strengthen the friction force between the rotating wheel 3 and the middle rotating wheel locking ring 32 and the tail rotating wheel locking ring 33 when the fastening ring 17 is screwed, and meanwhile, the locking key of the transmission shaft is matched with the key grooves of the middle rotating wheel locking ring 32 and the tail rotating wheel locking ring 33 so that the middle rotating wheel locking ring 32 and the tail rotating wheel locking ring 33 can not rotate along the transmission shaft, thereby ensuring more reliable synchronization of the rotating wheel 3 and the transmission shaft.

When the fastening ring 17 is loosened, the rotating wheel 3 and the adjacent middle rotating wheel locking ring 32 are loosened, at the moment, the 1-degree subdivision adjusting gear or the 30-degree rough subdivision adjusting gear is adjusted, the corresponding rotating wheel 3 can be rotated, at the moment, the adjacent middle rotating wheel locking ring 32 is loosened with the rotating wheel 3 and cannot rotate due to the matching of the locking keys, so that the rotation of the adjusted rotating wheel 3 can be ensured to rotate only between the two adjacent locking rings, and other rotating wheels 3 can not be driven to rotate, and the adjustment flexibility and reliability are ensured.

The utility model also provides a rotary limit switch, as shown in figures 1-14, and the rotary wheel adjusting structure of the rotary limit switch is adopted.

The rotary limit switch further comprises a gear set 12, a first circuit board 13, a second circuit board 14, an input shaft 15, a rotary wheel house 22 cover plate, an instrument house cover plate and a shell 20.

The housing 20 includes a shift house 21, a rotary wheel house 22, a first electrical house 23, a second electrical house 24, a rotary wheel house cover mounting post 25, an adjustment house cover mounting post 26, and a mounting bracket 27. The rotary wheel house cover plate mounting column 25 is provided with a rotary wheel house 22 cover plate mounting hole for mounting a rotary wheel house 22 top cover plate and a rotary wheel house 22 bottom cover plate. The cover plate of the rotary wheel bin 22 comprises a top cover plate of the rotary wheel bin 22, a bottom cover plate of the rotary wheel bin 22 and an adjusting bin cover plate, wherein the top cover plate of the rotary wheel bin 22, the bottom cover plate of the rotary wheel bin 22 and the instrument bin cover plate are all metal cover plates, and the rotary wheel bin 22 is simple in structure and is only a shell sealing component of the utility model, and has no substantial effect on the principle and the function of the utility model, so that the rotary wheel bin 22 is not shown in the drawings. The mounting bracket is machined with mounting holes 28 so that the rotary limit switch can be conveniently mounted on external application equipment.

The gear set 12 is installed in the speed changing bin 21, the rotating wheel set 2 is located in the rotating wheel bin 22, and the first circuit board 13 and the second circuit board 14 are installed in the first electric bin 23 and the second electric bin 24 respectively.

The input shaft 15 is connected to the drive shaft 1 via a gear set 12,

the rotary wheel 3 is provided with 36 rotary wheel scales which are distributed at the edge position of the rotary wheel 3 at equal intervals, each scale represents 10 degrees, and scale reading numbers are processed at every 30 degrees from 0 degrees. The whole rotating wheel 3 is a gear with the modulus of 0.5, the edge of the rotating wheel is 120 teeth, and the edge of the central hole is provided with a rotating wheel anti-skid groove 324. The magnet 31 is inlaid at the position, close to the scale reading, of the outer edge of the rotary wheel 3, the magnet 31 is an arc-shaped strip magnet, the arc circle center of the magnet is concentric with the rotary wheel 3, the magnet is processed by adopting a neodymium magnet, and the magnetic poles of the magnet are positioned on two sides of the arc-shaped strip. The central angle of magnet 31 may be 5 degrees, 15 degrees, 30 degrees, 90 degrees, 180 degrees, etc., including but not limited to these angles, and generally, the central angle of magnet 31 may be any angle to accommodate different process requirements. The smaller the central angle of magnet 31, the shorter the arc length of magnet 31, and the smaller the trigger zone of rotary wheel 3, whereas the larger the central angle of magnet 31, the longer the arc length of magnet 31, and the larger the trigger zone of rotary wheel 3. The requirements of the trigger intervals of the rotating wheel 3 are different according to different process requirements, so that the central angles of the magnets 31 are also different, and different magnets 31 can be customized for different process requirements.

In addition, since the rotary wheel house 22 has a compact internal structure and a limited space, the fastening and releasing of the fastening ring 17 cannot be operated by an universal wrench. In order to facilitate the fastening and loosening of the fastening ring, the outer edge of the fastening ring is provided with a fastening hole, and the fastening ring can be fastened on the transmission shaft or loosened from the transmission shaft by inserting a universal cross screwdriver into the fastening hole to move back and forth. The adjacent surfaces of the fastening ring 17 and the tail rotating wheel locking ring 33 are smooth surfaces, so that the fastening and loosening rotation resistance of the fastening ring is small, and the fastening of the whole rotating wheel set 2 can be ensured to be easier and more reliable.

The bottom of the rotating wheel set 2 is provided with a sensor bracket 19. The sensor bracket 19 is provided with 12 Hall sensors 191, and is also provided with a PCB circuit 192, and the PCB circuit 192 leads out pins of the Hall sensors and is then connected to the first circuit board 13 and the second circuit board 14, so that the corresponding relays are driven to complete the triggering action of the rotating wheel 3. Specifically, the first circuit board 13 and the second circuit board 14 are electrically connected to 6 hall sensors 191, respectively.

The bottom cover plate of the rotary wheel house 22 is fitted with cable connectors for connecting the electrical signals and power of the first and second circuit boards 13, 14 to the outside of the housing for signal acquisition and power supply of the application device.

The reason for designing the rotary limit switch with the gear set 12 is that since the rotary limit switch is usually mounted on a wire rope drum, the input shaft rotates coaxially with the wire rope drum, which is usually rotated a plurality of turns in the full stroke, whereas the rotating wheel 3 preferably does not rotate a plurality of turns, otherwise the triggering signal will occur a plurality of times in the full stroke, which results in no discrimination. A gear set 12 is therefore preferably added between the input shaft of the rotary limit switch and the rotary wheel 3 for changing the speed ratio between the input shaft and the rotary wheel set 2.

The gear set 12 includes a first ratio gear 121, a second ratio gear 122, a third ratio gear 123, a fourth ratio gear 124, and a fifth ratio gear 125. Input shaft key 151 is processed at both ends of input shaft 15, and input shaft key 151 at the front end is used for cooperation of wire rope reel shaft and rotary limit switch, and input shaft key 151 at the rear end of input shaft cooperates with first speed change gear 121, ensures synchronous rotation of first speed change gear 121 and input shaft. The first speed change gear 121 is meshed with the second speed change gear 122, the second speed change gear 122 is a double-layer gear, the top layer is a small gear, and the bottom layer is a large gear, wherein the large gear is meshed with the first speed change gear 121. The second speed gear 122 is meshed with the third speed gear 123. The third ratio gear 123 is a double-layer gear, the top layer is a large gear, and the bottom layer is a small gear, wherein the large gear is meshed with the small gear of the second ratio gear 122. The third speed change gear 123 is meshed with the fourth speed change gear 124, the fourth speed change gear 124 is a double-layer gear, the top layer is a pinion, and the bottom layer is a large gear, wherein the large gear is meshed with the pinion of the third speed change gear 123. The fourth ratio gear 124 meshes with a fifth ratio gear 125. The fifth speed change gear 125 is a single-layer gear, the fifth speed change gear 125 is mounted on a transmission shaft, a key is machined on the transmission shaft, a key groove is machined on the fifth speed change gear 125, and the fifth speed change gear 125 and the transmission shaft can rotate synchronously by matching with the key of the transmission shaft.

The first speed change gear 121 has the number of teeth 25; the number of large gear teeth 50 and the number of small gear teeth 30 of the second speed change gear 122; the third change gear 123 has a large gear number 30 and a small gear number 10; the fourth change gear 124 has a large gear number 40 and a small gear number 10; the number of teeth 50 of the fifth ratio gear 125. All ratio gears have a modulus of 0.5 and a pressure angle of 20 degrees. The speed ratio between the input shaft and the transmission shaft of the utility model is 40:1.

in addition, the speed ratio between the rotary limit switch input shaft and the drive shaft can be adjusted by changing the speed ratio between the large gear of the third gear and the small gear of the fourth speed change gear 124 to accommodate other process conditions.

Fig. 15 is a circuit diagram of the rotary limit switch. The circuit diagram is formed by combining 6 groups of unit circuits, wherein elements J1 to J6 are output connectors, elements D1 to D6 are freewheeling diodes of relays, element J11 is a power connector, element J12 is a sensor connector, elements K1 to K6 are output relays, the final node state of the rotary limit switch is output, elements Q1 to Q6 are driving transistors of the output relays, elements R1 to R6 are pull-up resistors of Hall sensors, elements R11 to R16 are base resistors of the driving transistors, and network tags T1 to T6 in J12 are connected with output ends of the Hall sensors and are input signal nodes of the circuit diagram.

The output relay is a final node state output element of the rotary limit switch, a pin 1 of a contact is a common end, a pin 3 of the output relay is connected with a normal open end, a pin 1 of the output relay is connected with a normal closed end, a pin 2 of the output relay is connected with a pin 2 of the output relay, a pin 5 of a coil of the output relay is connected with a collector electrode of a driving transistor, and a pin 4 of the coil of the output relay is grounded; the positive electrode of the freewheel diode is grounded, and the negative electrode of the freewheel diode is connected with the 5 pin of the output relay coil; the output transistor is used for driving the action state of the relay, the driving transistor is a PNP type low-power transistor, a common 8550 transistor can be selected, the emitter of the output transistor is connected with VCC, the collector of the output transistor is connected with the 5 pin of the coil of the output relay, and the base of the output transistor is connected with the 2 pin of the base resistor; the 1 pin of the pull-up resistor is connected with the output end of the Hall sensor, and the 2 pin is connected with the power VCC; the base resistor is used for limiting the current of the output of the Hall sensor, the 1 pin of the base resistor is connected with the output end of the Hall sensor and the 1 pin of the pull-up resistor, and the 2 pin of the base resistor is connected with the base of the driving transistor.

The Hall sensor selected by the rotary limit switch is a switch type, and the type of the Hall sensor is normally open type. When the trigger is not triggered, the output end of the Hall sensor is at a high level, the level is close to VCC, and when the trigger is triggered, the output end of the Hall sensor is at a low level, and the level is close to 0V. When the hall sensor is not triggered, the driving transistor will be turned off because its output is close to VCC, the output relay coil cannot be powered, and therefore the contacts of the output relay remain intact. When the Hall sensor is triggered, the output of the Hall sensor is close to 0V, so that the driving transistor is conducted, the output relay coil is electrified, and therefore the contact state of the output relay is turned over, and node state information can be output.

The rotary limit switch is simpler in working principle, and is usually installed on a steel wire rope winding drum of application equipment, and an input shaft of the rotary limit switch is connected with the steel wire rope winding drum shaft, so that the input shaft of the rotary limit switch and the steel wire rope winding drum shaft synchronously rotate. The rotation of the rotary limit switch input shaft will drive the rotary wheel set 2 to rotate after the gear set is decelerated, wherein the rotation of the rotary wheel 3 of the rotary wheel set 2 drives the magnet 31 to rotate, and when the magnet 31 rotates to the position of the Hall sensor, the Hall sensor is triggered, namely the limit switch structure is triggered. When the magnet 31 is separated from the hall sensor, the hall sensor is restored to the non-trigger state, that is, the limit switch structure is restored to the non-trigger state. The magnets 31 of different rotary wheels 3 are different in length, so that the trigger strokes or the non-trigger strokes of the corresponding hall sensors are different.

The locking ring is loosened, the rotating wheel set 2 can be in an adjustable state, and then the corresponding rotating wheel 3 can be adjusted to rotate to a specific angle by adjusting the corresponding 1-degree subdivision adjusting pointer or 30-degree coarse adjustment pointer according to the indication mark of the rotating wheel set 2, so that the corresponding rotating wheel 3 can trigger the Hall sensor at a specific position of the whole stroke of the application equipment or be separated from the Hall sensor. After the adjustment is finished, the locking ring is fastened, so that the rotary wheel set 2 can synchronously rotate with the transmission shaft, and the rotary wheel set 2 can rotate with the input shaft according to the speed ratio of the gear set, so that the rotary wheel set 2 is in a working state. At this time, in the working process of the application equipment, the rotary wheel set 2 triggers the hall sensor at a plurality of specific positions in the course or is separated from the hall sensor, so that the output relay is attracted or separated at a plurality of specific positions in the course, and the safety position interlocking control of the application equipment is realized.

The current limit of the rotating cam in the market mainly uses the cam sheet to trigger the micro switch to realize the basic function of the cam limit, and the defects existing at present mainly are that the trigger point of the cam sheet is the inflection point of the cam, which is unlikely to be abrupt change, and the micro switch also has a hysteresis area, thereby leading to low adjustment precision of the cam limit and also leading to low positioning precision of the cam limit. If the problems can be solved, the accuracy and stability of the cam limit can be obviously improved, and the adjustment difficulty of the rotating cam limit can be effectively reduced.

The rotary limit switch overcomes the defect of the conventional rotary cam limit by changing the form, the triggering mode and the adjusting mode of the existing cam piece. The rotary limit switch adopts a large-diameter gear to replace the traditional cam, an arc-shaped magnet strip, namely a magnet, is embedded in the inner edge of the rotary wheel, and the magnet is driven to rotate by the rotation of the rotary wheel. The triggering mode of the rotary limit switch is realized by detecting the magnet through the Hall sensor. The hall sensor is a magnetically sensitive sensor, and when enough magnetic force lines pass through the hall element, the switching state of the hall element is turned over. Therefore, when the magnet reaches the position of the Hall sensor along with the rotation of the rotating wheel, the switch state of the Hall sensor is overturned, so that the triggering state of the rotary limit switch is realized. The edge of the trigger curve of the Hall sensor is steep, and the characteristic shows that the Hall sensor is sensitive in action, so that the detection precision can be effectively improved. In addition, although the Hall sensor trigger curve also has a hysteresis zone, the hysteresis zone is very small, if the magnet made of neodymium magnet is adopted, the magnetic line density of the magnet can be effectively improved, so that the change curve of the magnetic line density of the trigger edge is steeper, the hysteresis zone of the Hall sensor action can be reduced, and the displacement fed back to the input end by the hysteresis zone can be ignored. Therefore, the defects of low positioning precision and large hysteresis area of the early-stage rotating cam limit are overcome.

Another reason for the rotary limit switch to use a large gear (i.e., a rotating wheel) instead of a cam is that fine adjustment of the rotating wheel can be achieved through a gear change transmission. Another disadvantage of early cam limiting is the difficulty of adjustment, and the inability to achieve fine adjustment. The rotary limit switch provided by the utility model realizes variable speed transmission of the rotary wheel through the two-stage adjusting gear transmission, thereby realizing two-stage accurate adjustment of the rotary wheel, wherein the first-stage adjusting gear is 1/12 conversion ratio, the second-stage adjusting gear is 1/3 conversion ratio, namely, the first-stage adjusting gear rotates for one circle, the rotary wheel rotates for 30 degrees, the second-stage adjusting gear rotates for one circle, the cam disc rotates for 10 degrees, coarse adjustment can be realized through the first-stage adjusting gear, fine adjustment can be realized through the second-stage adjusting gear, the two-stage adjusting mode can obviously improve the adjusting efficiency and precision, the gear transmission is bidirectional, the accurate adjustment can be realized through matching with the adjusting indicator and the dial, the rotating position of the rotary wheel in operation can be observed, the data recording is convenient, and the adjusted rotating angle of the rotary wheel is convenient to be re-carved into the limit of the other rotary wheel. Therefore, the utility model overcomes the defect that the current cam limit is difficult to adjust.

The Hall sensor is an active element and needs a circuit to drive, the load capacity of the Hall sensor is small, the switching signal of the Hall sensor needs to be converted into the switching signal of the relay through the driving circuit, the conversion of an active node into a passive node is realized, and the load capacity is improved. The rotary limit switch realizes the conversion function through the circuit boards, and each circuit board can be simultaneously connected with six Hall sensors to realize six-path node conversion. When two circuit boards are adopted, the conversion of 12 paths of nodes can be realized.

The rotary limit switch adopts a detection mode of a cam disc, a magnet and a Hall sensor, and the circuit also adopts a mode of a triode driving relay although the electronic element participates, so that the circuit is simple and reliable, and the main body part is still mainly driven by a machine, so that the rotary limit switch has high adaptability to severe environments and high resistance to vibration. The rotary limit switch is matched with a two-stage adjustment mode, so that the defects of low positioning accuracy, existence of a hysteresis area and difficulty in adjustment of the conventional limit of the rotary cam are overcome, and the defects of low service life and poor stability of the limit of the imported electronic cam in a severe working environment are overcome. Meanwhile, the device has the advantages of high stability and high adaptability to severe environments of the conventional rotary cam limit and the advantages of easiness in adjustment, high adjustment precision and high positioning precision of the inlet electronic cam limit.

In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and are not to be construed as limiting the present application.

Those skilled in the art will appreciate that the systems, apparatus, and their respective modules provided herein may be implemented entirely by logic programming of method steps such that the systems, apparatus, and their respective modules are implemented as logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers, etc., in addition to the systems, apparatus, and their respective modules being implemented as pure computer readable program code. Therefore, the system, the apparatus, and the respective modules thereof provided by the present utility model may be regarded as one hardware component, and the modules included therein for implementing various programs may also be regarded as structures within the hardware component; modules for implementing various functions may also be regarded as being either software programs for implementing the methods or structures within hardware components.

The foregoing describes specific embodiments of the present utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the utility model. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.

Claims (10)

1. The rotary wheel adjusting structure of the rotary limit switch is characterized by comprising a transmission shaft (1), a rotary wheel set (2), an adjusting structure and an instrument panel structure;

the rotating wheel set (2) is arranged on the transmission shaft (1); the instrument panel structure, the adjusting structure and the rotating wheel set (2) are sequentially connected in a transmission way;

the rotating wheel group (2) comprises a plurality of rotating wheels (3);

the instrument panel structure comprises a plurality of instrument panel groups (4), wherein each instrument panel group comprises a plurality of instrument panels (5) and a rotary wheel indication mark (6); the single-way instrument panel group corresponds to one adjusting structure one by one;

the instrument panels (5) comprise subdivision adjustment dials (51) and rough subdivision adjustment dials (52);

the adjusting structure comprises a subdivision adjusting gear (7), a coarse-division adjusting gear (8), a subdivision adjusting shaft (9) and a coarse-division adjusting shaft (10); the subdivision adjusting gear (7) is arranged on the subdivision adjusting shaft (9), and the subdivision adjusting gear (7) and the subdivision adjusting shaft (9) synchronously rotate; the rough-separation adjusting gear (8) is arranged on the rough-separation adjusting shaft (10), and the rough-separation adjusting gear (8) and the rough-separation adjusting shaft (10) synchronously rotate; the subdivision adjusting gear (7), the coarse subdivision adjusting gear (8) and the rotating wheel (3) are meshed in sequence;

the subdivision adjustment dial plate (51) and the rough subdivision adjustment dial plate (52) are respectively arranged at the end part of the subdivision adjustment shaft (9) and the end part of the rough subdivision adjustment shaft (10);

a subdivision adjustment pointer (511) is arranged in the subdivision adjustment dial plate (51), and the subdivision adjustment pointer (511) can drive the subdivision adjustment shaft (9) to rotate;

a rough-division adjusting pointer (521) is arranged in the rough-division adjusting dial plate (52); the rough adjustment pointer (521) can drive the rough adjustment shaft (10) to rotate.

2. The rotary limit switch rotary wheel adjustment structure according to claim 1, characterized in that the subdivision adjustment dial (51) is a 1 degree subdivision adjustment dial; the rough-separation adjustment dial plate (52) is a 30-degree rough-separation adjustment dial plate;

the subdivision adjusting gear (7) is a 1-degree subdivision adjusting gear; the rough-separation adjusting gear (8) is a 30-degree rough-separation adjusting gear;

the subdivision adjusting shaft (9) is a 1-degree subdivision adjusting shaft, and the coarse-division adjusting shaft (10) is a 30-degree coarse-division adjusting shaft (10).

3. The rotary limit switch rotary wheel adjusting structure according to claim 1, wherein the subdivision adjusting gear (7) is a single-layer gear;

the rough-separation adjusting gear (8) is a large-small double-layer gear;

the subdivision adjusting gear (7) is meshed with a large gear of the rough subdivision adjusting gear (8), and a small gear of the rough subdivision adjusting gear (8) is meshed with the rotating wheel (3).

4. The rotary limit switch rotating wheel adjusting structure according to claim 1, wherein adjusting holes are provided in the middle of the fine division adjusting pointer (511) and the rough division adjusting pointer (521), and an operator can rotate the fine division adjusting pointer (511) and the rough division adjusting pointer (521) through the adjusting holes.

5. The rotary limit switch swivel wheel adjustment structure of claim 1, further comprising a meter compartment (11), the meter compartment being located within the meter compartment (11).

6. The rotary limit switch rotary wheel adjustment structure according to claim 1, characterized in that the instrument panel group (4) is 12-way;

the 12 instrument panel groups (4) are vertically and symmetrically arranged on two sides of the center of the instrument bin (11) at the instrument panel, 6 instrument panel groups on each side are circumferentially arranged by taking the transmission shaft as the center, the initial angle of the central line of the upper instrument panel group (4) of the instrument panel groups on two sides is 50 degrees, and the interval angle of the central lines of the adjacent instrument panel groups (4) on the same side is 20 degrees.

7. The rotary limit switch rotary wheel adjusting structure according to claim 1, wherein the rotary wheel (3) is provided with wheel disc scales;

a scale indicator bracket (18) is arranged at the top of the rotating wheel group (2), a plurality of scale indicators (181) are arranged on the scale indicator bracket (18), and the single scale indicator is matched with the scale on the disc of the single rotating wheel (3) to indicate the rotating angle of the rotating wheel.

8. The rotary limit switch rotary wheel adjusting structure according to claim 1, further comprising a transmission shaft locking ring (16), a fastening ring (17), an intermediate rotary wheel locking ring (32) and a tail rotary wheel locking ring (33);

a transmission shaft locking ring (16) is processed at the head part of the transmission shaft (1); an intermediate rotary wheel locking ring (32) is arranged between the front end of the head rotary wheel (3) and each rotary wheel (3), and the tail end of the tail rotary wheel (3) is provided with a tail rotary wheel locking ring (33);

the transmission shaft locking ring (16) is tightly clung to the middle rotary wheel locking ring (32) at the head part, the tail part of the transmission shaft (1) is movably provided with the fastening ring (17), and the fastening ring (17) can move along the length direction of the transmission shaft (1).

9. The rotary limit switch rotating wheel adjusting structure according to claim 8, wherein the anti-slip protrusions (321) are formed on both sides of the middle rotating wheel locking ring (32), and the anti-slip protrusions (321) are formed on one side of the tail rotating wheel locking ring (33);

the central hole of the rotating wheel (3) is circumferentially provided with anti-slip grooves (324), and the anti-slip protrusions (321) can be matched with the anti-slip grooves (324) mutually;

a key slot (322) is arranged on the middle rotary wheel locking ring (32) and the tail rotary wheel locking ring (33);

a plurality of locking keys (323) are uniformly arranged on the transmission shaft (1), and the locking keys (323) can be matched with key grooves on the middle rotary wheel locking ring (32) and key grooves on the tail rotary wheel locking ring (33).

10. A rotary limit switch, characterized in that the rotary wheel adjusting structure of the rotary limit switch is adopted in any one of claims 1-9.