CN116675139A

CN116675139A - Heavy low-level double-arm duplex elevator

Info

Publication number: CN116675139A
Application number: CN202310650563.4A
Authority: CN
Inventors: 周董; 易纯飞; 周海洋; 苏忠鹏; 张晓晨
Original assignee: Zhejiang Wise Automation Engineering Zhejiang Co ltd
Current assignee: Zhejiang Wise Automation Engineering Zhejiang Co ltd
Priority date: 2023-06-02
Filing date: 2023-06-02
Publication date: 2023-09-01

Abstract

The application discloses a heavy low-position double-arm duplex lifter, which comprises a conveying line, a frame, a screw lifting mechanism, a driving mechanism and a screw segment position adjusting mechanism, wherein the conveying line is arranged on the frame; the screw lifting mechanism comprises an end plate, a screw, a nut piece, a sliding block and a thrust component, the end head of the screw penetrates through the end plate, the screw penetrates through the thrust component and is prevented from sliding downwards relative to the thrust component, and a frame body of the conveying line is fixed on the sliding block; the screw section position adjusting mechanism comprises a first gear, an inner nut, an electric positioner and a rotation stopping assembly, wherein the first gear is sleeved on the screw and is provided with a nut cavity along a central axis concave shape; the other is used for abutting against the screw rod; the rotation stopping assembly is used for preventing the screw from rotating when the electric positioner abuts against the inner nut. The application has the effect of reducing the use cost of the conveying line with the adjustable height position.

Description

Heavy low-level double-arm duplex elevator

Technical Field

The application relates to the technical field of automatic production and processing, in particular to a heavy-duty low-position double-arm duplex lifter.

Background

In various automatic production lines and workshops, the conveying of materials is realized by using a conveyor.

Currently, there is a need for two conveyor lines in parallel, one for transporting containers filled with material to a work area and the other for transporting empty containers back from the work area, and for adjusting the height of the line once at intervals, such as: meets the use requirement of 120mm at the low position and 150mm at the high position.

To above-mentioned, can utilize screw nut complex mode to drive the transfer chain and go up and down, but because the high position of transfer chain is many fixed, and the transfer chain adds the material weight on it and is great relatively again, this leads to the screw rod to use the position wearing and tearing greatly, and other sections utilization ratios are low, just fix several point positions and damage just change whole elevating system, use cost is higher.

Disclosure of Invention

In order to reduce the use cost of the conveying line with the adjustable height position, the application provides a heavy-duty low-position double-arm duplex lifter.

The application provides a heavy low-position double-arm duplex lifter, which adopts the following technical scheme:

a heavy low-level double-arm duplex lifter comprises two parallel conveying lines, wherein the conveying lines comprise a frame, a screw lifting mechanism, a driving mechanism and a screw segment position adjusting mechanism;

the screw lifting mechanism comprises an end plate, a screw, a nut piece, a sliding block and a thrust component, wherein the end plate and the thrust component are arranged up and down, the end head of the screw penetrates through the end plate, the screw penetrates through the thrust component and is prevented from sliding downwards relative to the thrust component, the nut piece is connected with the screw in a threaded manner, the sliding block is fixed on the nut piece, and a frame body of the conveying line is fixed on the sliding block;

the screw rod section position adjusting mechanism comprises a first gear, an inner nut, an electric positioner and a rotation stopping assembly, wherein the first gear is sleeved on the screw rod and is provided with a nut cavity along a central axis in a concave manner, the inner nut is connected with the screw rod in a threaded manner and is arranged in the nut cavity, the inner nut is circular in overlook, the electric positioner is provided with two telescopic positioning parts, and the electric positioner is embedded in the first gear and is telescopic along the radial direction of a nut piece and is used for abutting against the inner nut; the other electric positioner is arranged on the first gear, and the positioning part stretches along the radial direction of the first gear and is used for abutting against the screw rod; the rotation stopping assembly is used for preventing the screw from rotating when the electric positioner abuts against the inner nut;

the driving mechanism is used for driving the first gear to rotate.

Optionally, the thrust component comprises a thrust bearing, a follow-up disc and an accessory lifting component, wherein the thrust bearing is trapezoidal in side view, one end of the thrust bearing with a smaller diameter faces downwards, the thrust bearing is sleeved with a fixed screw rod, the follow-up disc is funnel-shaped, and the thrust bearing falls on the inner wall of the follow-up disc; the auxiliary lifting assembly is used for driving the follow-up disc to lift along with the screw rod.

Optionally, the accessory lifting component comprises an electric rope winder and a pull rope wound on the electric rope winder, and the movable end of the pull rope is fixed on the follow-up disc.

Optionally, the electronic locator includes the electricity and pushes away the jar and is fixed in the locating pin that pushes away the flexible rod end of jar, the locating pin is as the location portion of electronic locator, a plurality of pinholes are seted up along length direction to the screw rod, a plurality of pinholes are seted up around the inside wall in the nut chamber.

Optionally, the anti-rotation assembly comprises a side rod radially fixed to the screw rod and a cylinder fixed to the end plate, and a telescopic rod of the cylinder faces downwards and can extend to the rotation direction of the side rod.

Optionally, the tip of locating pin is provided with pressure sensor, be provided with little control unit on the gear one, little control unit electricity is connected with wireless communication unit, electric locator and pressure sensor are connected in microcontroller respectively electricity.

Optionally, the upper part of the first gear is provided with two electrode rails which are parallel to each other around the central axis, and the two electrode rails are respectively used for connecting the positive electrode and the negative electrode of the power supply; the electric locator takes electricity from the electrode rail.

Optionally, the automatic rope winding device further comprises a lifting coordination control module, wherein the lifting coordination control module is electrically connected with the driving mechanism and the electric rope winding device and is connected with the microcontroller through the wireless communication unit.

Optionally, the lifting coordination control module is configured to:

acquiring a previous rotation control quantity of a motor;

if the execution times of the same rotation control quantity exceeds the preset fixed position automatic setting triggering times, defining the rotation control quantity as a high-low position adjusting parameter;

calculating according to the high-low position adjusting parameters and a preset transmission ratio to obtain the lifting quantity of the conveying line;

when the number of times that the high-low position adjusting parameter is executed exceeds a preset abrasion adjusting threshold value, executing a preset screw lifting process; the screw lifting process comprises the step of calculating the winding and unwinding quantity of the electric rope winder based on the Pythagorean theorem and the screw lifting quantity.

Optionally, the lift coordination control module is connected with the inductor group electrically, and the inductor group is including the travel switch that is used for the upper and lower extreme position of response slider and the distance sensor that is used for detecting slider, screw rod position.

In summary, the present application includes at least one of the following beneficial technical effects: the screw tooth section used by the lifting screw rod can be adjusted at intervals according to the height of the conveying line, so that the utilization rate of the whole screw rod is improved, the replacement is reduced, and the cost is reduced.

Drawings

FIG. 1 is a schematic view of a partial top view of the present application;

FIG. 2 is an end view schematic of the present application;

FIG. 3 is a schematic view of the construction of the screw lifting mechanism and drive mechanism portion of the present application;

FIG. 4 is a schematic illustration of the gear with the tooth structure removed;

fig. 5 is a schematic diagram of the control structure of the present application.

Reference numerals illustrate: 1. a conveying line; 2. a frame; 3. a screw lifting mechanism; 31. an end plate; 32. a guide rail; 33. a screw; 34. a nut member; 35. a slide block; 36. a thrust bearing; 37. a follower disk; 381. an electric rope winder; 382. a fixed pulley; 383. a traction rope; 4. a driving mechanism; 41. a motor; 42. a reduction gearbox; 43. a second gear; 5. a screw segment position adjusting mechanism; 51. a first gear; 511. a receiving chamber; 52. an inner nut; 53. an electric positioner; 531. an electric pushing cylinder; 532. a positioning pin; 54. a side bar; 55. a cylinder; 61. a pressure sensor; 62. a microcontroller; 63. a wireless communication unit; 7. a lifting coordination controller; 8. an inductor group; 81. a travel switch; 82. a distance sensor; 9. and an electrode rail.

Description of the embodiments

The application is described in further detail below with reference to fig. 1-5.

The embodiment of the application discloses a heavy low-position double-arm duplex lifter.

Referring to fig. 1, 2 and 3, a heavy-duty low-level double-arm duplex elevator includes: the device comprises a conveying line 1, a frame 2, a screw lifting mechanism 3, a driving mechanism 4 and a screw segment position adjusting mechanism 5.

The conveying line 1 may be a roller conveyor in this embodiment, which is not described in detail in the prior art. The conveying line 1 is provided with two conveying lines and is arranged in parallel and used for conveying cargoes in a double-channel mode.

The frames 2 are also two groups, one being a left frame and one being a right frame, on each side of the two conveyor lines 1. The frame 2 is composed of a base plate and a vertical plate fixed on the base plate, and the vertical plate is used as a supporting foundation for realizing the lifting of the conveying line 1.

Referring to fig. 2 and 3, the screw elevating mechanism 3 includes an end plate 31, a guide rail 32, a screw 33, a nut member 34, a slider 35, and a thrust assembly. The guide rail 32 is fixed on the vertical plate of the frame 2 and has a vertical length direction, and a sliding groove is formed in the guide rail 32 along the length direction. The end plate 31 is fixed to an end of the guide rail 32 and is provided with a through hole.

The screw 33 is vertically arranged and penetrates through the through hole on the end plate 31, is in rotary connection with the end plate 31, and can relatively move up and down. The screw 33 is not threaded at the adjacent ends, and has a length of 50cm, for example, and the screw 33 can be adjusted up and down by 50cm at the maximum.

The nut member 34 is screwed to the screw 33, and the slider 35 is fixed to the nut member 34 by a bolt and slidingly coupled to the slide groove on the guide rail 32. The frame body of the conveyor line 1 and the power motor for driving are mounted on the slider 35, so that the conveyor line 1 can be lifted and lowered.

Referring to fig. 3, the thrust assembly is provided in order to accommodate other arrangements of the present application described below, and also in order to supplement the end plate 31 not supporting the screw 33. The thrust assembly includes a thrust bearing 36, a follower disk 37 and an accessory lift assembly.

The thrust bearing 36 has a trapezoidal longitudinal section, and the thrust bearing 36 and the screw 33 are fixed on the same central axis with the smaller diameter end facing downward. The follow-up disc 37 is funnel-shaped and sleeved on the screw 33; the thrust bearing 36 falls within the follower disk 37, and rolling elements (rollers) on the thrust bearing 36 abut against the inner wall of the follower disk 37.

When the screw 33 drives the thrust bearing 36 to lift, the follower plate 37 is lifted synchronously by the auxiliary lifting assembly. For this purpose, an auxiliary slide is fastened to the outer wall of the follower disk 37, which slide is connected to the slide groove on the guide rail 32.

The accessory lift assembly includes an electric rope reel 381, a fixed sheave 382, and a traction rope 383. The fixed pulley 382 is fixed to the vertical plate of the frame 2, and is close to the end plate 31 far away from the ground, so as to realize rotary connection through a pulley seat. The electric rope winder 381 is installed on the ground, one end of the traction rope 383 is wound on the electric rope winder 381, and the other end of the traction rope winds around the fixed pulley 382 and is bound and fixed downwards to a hanging ring formed on the outer wall of the follow-up disc 37.

Referring to fig. 3, the screw segment adjusting mechanism 5 is configured to lift the screw 33 under the power provided by the driving mechanism 4, and is configured to change the screw tooth segment corresponding to the same height of the screw 33 relative to the ground, so as to avoid that a certain point of the screw 33 is excessively worn and other screw tooth segments are intact because the height requirement of the conveying line 1 is always fixed, and the screw 33 has low utilization rate.

Referring to fig. 4, the screw segment adjustment mechanism 5 includes a gear one 51, an inner nut 52, and an electric positioner 53.

Wherein, the first gear 51 is sleeved on the screw 33, and the first gear and the screw can relatively lift and rotate; which is secured to the screw 33 by the locking action of the electric positioner 53.

The driving mechanism 4 comprises a motor 41 fixed on the frame 2 and a reduction gearbox 42, an input shaft of the reduction gearbox 42 is fixed on an output shaft of the motor 41, the output shaft of the reduction gearbox 42 is fixed on a transmission shaft through a coupler, a second gear 43 is fixed on the transmission shaft along a central axis, and the second gear 43 and the first gear 51 are bevel gears and are meshed with each other.

When the conveying line 1 needs to be lifted, the motor 41 drives the gear two 43 to rotate, drives the gear one 51 to rotate, and drives the screw 33 to rotate in a state of being fixed with the screw 33, at this time, the nut member 34 on the screw 33 is not rotatable due to the limiting effect of the matched guide rail 32 of the sliding block 35, and can only be lifted, so that the lifting of the conveying line 1 is realized.

Referring to fig. 4, a nut cavity is formed in the upper portion of the first gear 51 along the central axis, the outer wall surface of the inner nut 52 is a circumferential surface, and the inner nut 52 is screwed to the screw 33 and is rotatably disposed in the nut cavity.

The first internal gear 51 is provided with a containing cavity 511 at the side and the lower part of the nut cavity, and the electric positioner 53 is arranged in the containing cavity 511; one accommodating cavity 511 is opened at the upper part, one accommodating cavity 511 is opened at the lower part, and the openings of the two accommodating cavities 511 are covered with a fixedly matched cover plate.

The electric positioner 53 comprises an electric pushing cylinder 531 and a positioning pin 532 fixed on the telescopic rod end of the electric pushing cylinder 531, the cylinder body of the electric pushing cylinder 531 is fixed in the accommodating cavity 511, the positioning pin 532 can penetrate the first gear 51, and one positioning pin 532 is radially arranged along the inner nut 52 and can abut against the inner nut 52; another detent 532 is provided radially along the screw 33 to abut the screw 33.

As can be seen from the above, when the gear one 51 and the screw 33 are required to be fixed to achieve the function of the normal screw transmission structure, one positioning pin 532 is required to abut against the screw 33, and the other positioning pin 532 is required to not abut against the inner nut 52.

When the screw 33 needs to be lifted, one positioning pin 532 is made to abut against the inner nut 52, and the other positioning pin 532 is separated from the screw 33; at this time, the first gear 51 rotates to drive the inner nut 52 to rotate, and the first gear 51 rotates relative to the screw 33; as the inner nut 52 rotates, the screw 33 threadedly coupled thereto starts to rise and fall (provided that it is not rotatable).

Referring to fig. 3, in order to ensure that the screw 33 can be lifted and lowered when necessary, the screw 33 needs to be lifted and lowered without being rotated, and in order for the screw segment adjusting mechanism 5 to further include a rotation stopping assembly including a side lever 54 and a cylinder 55, the side lever 54 is radially fixed to the screw 33 and is close to the upper end plate 31. The cylinder body of the cylinder 55 is fixed to the end plate 31 and the telescopic rod is extended downward to the rotation direction of the side rod 54. When the screw 33 is required to be lifted, the telescopic rod of the air cylinder 55 blocks the side rod 54 from rotating, i.e., the screw 33 is not rotatable.

Referring to fig. 4 and 5, in order to enhance the positioning effect of the electric positioner 53, a plurality of pin holes for fitting the positioning pins 532 are formed in the screw 33 in the longitudinal direction, and a plurality of pin holes are formed in the outer circumferential wall of the inner nut 52.

That is, the positioning pin 532 is inserted into the pin hole to perform positioning, and the positioning effect is ensured.

In order to avoid dislocation when the electric positioner 53 needs to be inserted into the pin hole, a fixed pressure sensor 61 is embedded at the outer end of the positioning pin 532, and the sensing end of the pressure sensor 61 faces outwards. Thus, it is possible to determine whether the pressure is correct after the electric positioner 53 is extended by a specified length, if so, it is plugged in place, if not, it is plugged in incorrectly.

The first gear 51 is also provided with a control box, a microcontroller 62 and a wireless communication unit 63 are arranged in the control box, the microcontroller 62 and the wireless communication unit 63 are integrated on the same circuit board, the microcontroller 62 is electrically connected with the pressure sensor 61, the electric positioner 53 and the wireless communication unit 63, and the wireless communication unit 63 can be a Bluetooth unit.

Referring to fig. 4, since the gear one 51 rotates, if the conventional wire is used for power supply, there is a problem of winding, and although the wire can be normally supplied when the length is enough, the wire is wasteful and easy to wear, so that the electrode rails 9 are disposed around the central axis on the upper portion of the gear one 51, the electrode rails 9 are two and parallel to each other, and the two electrode rails 9 are respectively used for connecting the positive and negative electrodes of the power supply (drawn conductive brush, conductive brush contact electrode rail). The electrical appliance on gear one 51 draws power from both electrode rails 9.

Referring to fig. 5, the present application further includes a lifting coordination controller 7, where the lifting coordination controller 7 may be a control computer connected to a PLC control cabinet, where the PLC control cabinet is electrically connected to the motor 41, the electric rope winder 381, and the conveyor line 1, and the control computer is interconnected with the microcontroller 62 through a bluetooth module on the main board.

The elevation coordination controller 7 is provided with:

acquiring a previous rotation control amount of the motor 41;

calculating according to the high-low position adjusting parameters and a preset transmission ratio to obtain the lifting quantity of the conveying line 1;

and when the number of times the high-low level adjustment parameter is executed exceeds the abrasion adjustment threshold value, executing a preset screw lifting process.

The screw lifting process comprises the following steps:

firstly, the electric positioner 53 locks the gear I51 and the inner nut 52, and the positioning of the gear I51 and the screw 33 is released;

the cylinder 55 is extended to prevent the side rod 54 from rotating;

then, the motor 41 drives the first gear 51 to rotate so as to drive the inner nut 52 to drive the screw 33 to lift, the lifting amount of the screw 33 reaches the lifting amount of the conveying line 1, then the lifting amount is stopped, the cylinder 55 is retracted, the first gear 51 and the screw 33 are locked, but the first gear 51 and the inner nut 52 are not locked, namely, the normal screw transmission structure state is restored.

During the lifting and lowering of the screw 33 described above, the electric rope winder 381 synchronously winds and unwinds the wire to support the screw.

The pay-out amount of the electric rope winder 381 is calculated based on the Pythagorean theorem, the screw lift amount is a, the pay-out amount is c, and the horizontal distance between the fixed pulley 382 and the screw 33 is b, so that c is calculated at a known time when a and b are both known.

It is understood that the thrust assemblies may be provided in multiple groups to ensure support stability.

Referring to fig. 5, in order to facilitate automation control, the present application further provides a sensor group 8 connected to the PLC control cabinet, the sensor group 8 including a travel switch 81 and a distance sensor 82.

The travel switches 81 are arranged in two groups and are respectively positioned at the beginning and end positions of the moving height of the sliding block 35, and can be triggered by a shifting block fixed on the sliding block 35. The plurality of distance sensors 82 are respectively fixed at the lower part of the frame 2, and at least one distance sensor 82 senses the position of the slide block 35 upwards; at least one distance sensor 82 is located at the very lower end of the screw 33 for sensing the position of the screw 33.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. Heavy low level double arm duplex lift, including two parallel transfer chain (1), its characterized in that: comprises a frame (2), a screw lifting mechanism (3), a driving mechanism (4) and a screw (33) section position adjusting mechanism;

the screw lifting mechanism (3) comprises an end plate (31), a screw (33), a nut piece (34), a sliding block (35) and a thrust component, wherein the end plate (31) and the thrust component are arranged up and down, the end of the screw (33) penetrates through the end plate (31), the screw (33) penetrates through the thrust component and is prevented from sliding downwards relative to the thrust component, the nut piece (34) is in threaded connection with the screw (33), the sliding block (35) is fixed on the nut piece (34), and a frame body of the conveying line (1) is fixed on the sliding block (35);

the screw rod (33) section position adjusting mechanism comprises a gear I (51), an inner nut (52), an electric positioner (53) and a rotation stopping assembly, wherein the gear I (51) is sleeved on the screw rod (33) and is concavely provided with a nut cavity along a central axis, the inner nut (52) is in threaded connection with the screw rod (33) and is arranged in the nut cavity, the inner nut (52) is circular in overlook view, the electric positioner (53) is provided with two telescopic positioning parts, and one electric positioner (53) is embedded in the gear I (51) and the positioning parts are telescopic along the radial direction of a nut piece (34) and are used for abutting against the inner nut (52); the other electric positioner (53) is arranged on the first gear (51) and the positioning part stretches along the radial direction of the first gear (51) for abutting against the screw rod (33); the rotation stopping assembly is used for preventing the screw rod (33) from rotating when the electric positioner (53) abuts against the inner nut (52);

the driving mechanism (4) is used for driving the first gear (51) to rotate.

2. The heavy duty low level double arm duplex elevator of claim 1, wherein: the thrust assembly comprises a thrust bearing (36), a follow-up disc (37) and an auxiliary lifting assembly, wherein the thrust bearing (36) is trapezoidal in side view, one end of the thrust bearing with a smaller diameter faces downwards, the thrust bearing (36) is sleeved with a fixed screw (33), the follow-up disc (37) is funnel-shaped, and the thrust bearing (36) falls on the inner wall of the follow-up disc (37); the auxiliary lifting assembly is used for driving the follow-up disc (37) to lift along with the screw rod (33).

3. The heavy duty low level double arm duplex elevator of claim 2, wherein: the auxiliary lifting assembly comprises an electric rope reel (381) and a pull rope wound on the electric rope reel (381), and the movable end of the pull rope is fixed on a follow-up disc (37).

4. The heavy duty low level double arm duplex elevator of claim 1, wherein: the electric positioner (53) comprises an electric pushing cylinder (531) and a positioning pin (532) fixed on the telescopic rod end of the electric pushing cylinder (531), the positioning pin (532) is used as a positioning part of the electric positioner (53), a plurality of pin holes are formed in the screw (33) along the length direction, and a plurality of pin holes are formed in the inner side wall of the ring in the nut cavity.

5. The heavy duty low level double arm duplex elevator of claim 4, wherein: the rotation stopping assembly comprises a side rod (54) radially fixed to the screw rod (33) and a cylinder (55) fixed to the end plate (31), and the telescopic rod of the cylinder (55) faces downwards and can extend to the rotation direction of the side rod (54).

6. A heavy duty low level double arm duplex elevator according to claim 3, wherein: the end of the locating pin (532) is provided with a pressure sensor (61), the first gear (51) is provided with a micro control unit, the micro control unit is electrically connected with a wireless communication unit (63), and the electric locator (53) and the pressure sensor (61) are respectively electrically connected with a microcontroller (62).

7. The heavy duty low level double arm duplex elevator of claim 6, wherein: the upper part of the first gear (51) is provided with two electrode rails (9) which are parallel to each other around the central axis, and the two electrode rails (9) are respectively used for connecting the positive electrode and the negative electrode of a power supply; the electric locator (53) takes electricity from the electrode rail (9).

8. The heavy duty low level double arm duplex elevator of claim 7, wherein: the automatic rope winding device also comprises a lifting coordination control module which is electrically connected with the driving mechanism (4) and the electric rope winder (381) and is connected with the microcontroller (62) through the wireless communication unit (63).

9. The heavy duty low level double arm duplex elevator of claim 8, wherein: the lifting coordination control module is set as follows:

acquiring a calendar rotation control amount of a motor (41);

calculating according to the high-low position adjusting parameters and a preset transmission ratio to obtain the lifting quantity of the conveying line (1);

when the number of times the high-low level adjustment parameter is executed exceeds a preset abrasion adjustment threshold value, executing a preset screw (33) lifting process; the lifting process of the screw (33) comprises the step of calculating the winding and unwinding quantity of the electric rope winder (381) based on the Pythagorean theorem and the lifting and lowering quantity of the screw (33).

10. The heavy duty low level double arm duplex elevator of claim 9, wherein: the lifting coordination control module is electrically connected with an inductor group (8), and the inductor group (8) comprises a travel switch (81) for sensing the upper limit position and the lower limit position of the sliding block (35) and a distance sensor (82) for detecting the positions of the sliding block (35) and the screw rod (33).