CN110606444A - Stack lifting mechanism based on cylinder constant tension - Google Patents

Abstract

The invention discloses a stacking and lifting mechanism based on the constant pulling force of the cylinder, which comprises two brackets arranged symmetrically on the left and right, and a stacking lifting frame that can move up and down along the two brackets is arranged between the two brackets, and the two brackets are tightened by tightening the sprockets The chain is connected with the stacking lifting frame and the tensioning cylinder, and the two tensioning cylinders are connected with the first electromagnetic on-off valve, pressure regulating and overflow valve, one-way valve, and the second electromagnetic on-off valve through the air pipe, and the two brackets are sleeved There is a transmission sprocket meshing with the lifting rack ring, and the bottom ends of the two lifting rack rings are meshed with a lifting sprocket, and the two lifting sprockets are sleeved on a roller fixed on the two brackets. The shaft is connected to a drive source that causes it to roll. This mechanism is equipped with two cylinders combined with a unidirectional rotating sprocket, so that the stacking frame is subjected to a constant tension, and the stacking lifting frame can be lifted and lowered precisely without adding a pressure compensation system. The structure of this mechanism is simple, easy to manufacture and realize, and the manufacturing cost is low. Controlled and maintained, suitable for widespread deployment.

Description

Stack lifting mechanism based on cylinder constant tension

technical field

The invention relates to a stacking lifting mechanism on a mechanical automatic production line, in particular to a stacking lifting mechanism based on a constant tension force of a cylinder.

Background technique

With the development of science and technology, the mechanized automatic production line has become the main production equipment of the existing industry, and the stacking lifting mechanism is an essential part of the production line, generally located at the front or rear end of the production line at the loading and unloading place. The traditional stacking lifting mechanism uses a heavy hammer with a certain weight to realize the lifting. When the heavy hammer falls from a high place, the stacking frame is pulled up. Because the weight of the heavy hammer is large and the inertia is large, the falling speed is faster , is difficult to control, resulting in damage to equipment such as large vibrations.

At present, the stacking lifting mechanism generally uses motor-driven lifting or hydraulic (pneumatic) drive to achieve lifting. Although these two drive lifting methods overcome the defects of traditional heavy hammers, they still have the following shortcomings: using motor drive, due to intermittent motion Frequent times (starting and stopping frequently), ordinary asynchronous motors will quickly heat up and burn out. If stepping motors, servo motors and other program motors are used, the equipment cost is too high and the maintenance cost is also high; using hydraulic cylinders or cylinders to drive, If the stacker needs to stay at a precise position, due to the leakage of the solenoid valve, the pressure at both ends of the hydraulic cylinder or cylinder cannot be kept consistent for a long time, so the stacker cannot stop at the same position every time. If the pressure compensation system is added, The input cost increases and the control is inconvenient and the maintenance cost is high.

Contents of the invention

Aiming at the deficiencies in the prior art, the present invention provides a stacking lifting mechanism based on constant tension of cylinders. This mechanism is equipped with two cylinders combined with a ratchet mechanism that rotates in one direction, so that the stacking lifting frame is subjected to a constant pulling force to realize precise lifting of the stacking lifting frame. , without adding a pressure compensation system, the mechanism has a simple structure, is easy to manufacture and realize, has low manufacturing cost, is easy to control and maintain, and is suitable for widespread promotion.

In order to achieve the above object, the technical scheme that the present invention takes:

The stacking and lifting mechanism based on the constant pulling force of the cylinder includes a frame, and the frame includes two supports symmetrically arranged on the left and right. A plurality of rotating shafts, each of which is equipped with a tightening sprocket, and the tightening sprockets on the same bracket are all meshed with a tightening chain, and one end of the two tightening chains is connected with the stacking lifting frame. The other ends of the tightening chains are respectively connected with a tensioning cylinder, the two tensioning cylinders are connected to the first electromagnetic on-off valve through the air pipe, and the two tensioning cylinders are respectively connected to the pressure regulating overflow valve, the one-way valve, and the second valve through the air pipe. The electromagnetic on-off valve is connected, and a rotating shaft on the two brackets is equipped with a transmission sprocket, and the two transmission sprockets are meshed with a vertically arranged lifting rack ring, and the bottom ends of the two lifting rack rings are connected with a lifting rack ring. The sprockets are meshed, and the two elevating sprockets are sleeved on a roller fixed on the two brackets, and the roller is connected with a driving source that makes it roll.

As a preferred technical solution, in order to facilitate the heavy stacking lifting frame to move up and down along the two supports, and avoid causing large vibrations to the frame when the stacking lifting frame descends to the bottom, it is beneficial to prolong the service life of the frame. The four ends of the stacking lifting frame are all provided with rollers that can roll up and down along the two supports.

As an optimal technical solution, in order to ensure that the two lifting rack rings are tight and can rotate smoothly, it is beneficial to drive the tensioning sprocket to rotate synchronously, and realize the precise stop of the stacking lifting frame. A fastening sprocket is arranged between.

As a preferred technical solution, in order to ensure the stability of the two supports, to ensure that the stacking lifting frame is stable up and down, and to improve the safety performance of the entire stacking and lifting mechanism, there is a stabilizing rod arranged obliquely on the two supports.

Compared with the prior art, the present invention has the beneficial effects:

1. This mechanism is equipped with two cylinders combined with a one-way rotating ratchet mechanism, so that the stacking lifting frame is subjected to a constant tension, and the stacking lifting frame can be lifted and lowered precisely without adding a pressure compensation system. The structure of this mechanism is simple, easy to manufacture and realize, and the manufacturing cost is low. Low, easy to control and maintain, suitable for wide deployment.

2. The four ends of the stacking lift frame are provided with rollers, which is convenient for the heavy stacking lift frame to move up and down along the two supports, and at the same time avoid causing large vibrations to the frame when the stacking lift frame descends to the bottom, which is beneficial to extend the life of the frame. service life.

3. There are fastening sprockets on the two brackets to ensure the stability of the two brackets, ensure the stable up and down lift of the stacking lifting frame, and improve the safety performance of the entire stacking lifting mechanism.

4. There are stabilizing rods on the two brackets to ensure the stability of the two brackets, ensure the stable up and down lifting of the stacking lifting frame, and improve the safety performance of the entire stacking lifting mechanism.

Description of drawings

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the trachea connection diagram of two tightening cylinders;

Reference numerals: 1, frame, 1-1, bracket, 1-2, stabilizing rod, 2, stacking lifting frame, 3, rotating shaft, 3-1, rotating shaft seat, 4, tightening sprocket, 5, tightening Chain, 6, tightening cylinder, 7, first electromagnetic on-off valve, 8, pressure regulating overflow valve, 9, one-way valve, 10, second electromagnetic on-off valve, 11, transmission sprocket, 12, lifting gear Bar ring, 13, lifting sprocket, 14, roller, 15, roller, 16, fastening sprocket, 17, driving source.

Detailed ways

Propose a kind of specific embodiment of the present invention as shown in Figure 1, the stacking and lifting mechanism based on the constant tension of the cylinder includes a frame 1, and the frame 1 includes two supports 1-1 arranged symmetrically on the left and right, and the present embodiment sets Both supports 1-1 are in the shape of a vertically folded frame, and the bottom ends of the two supports 1-1 are connected to each other. In order to improve the stability of the frame 1, the two supports 1-1 are preferably integrally formed. There is a square-shaped stacking lifting frame 2 that can move up and down along it, and several rotating shafts 3 are arranged symmetrically on the tops of the two supports 1-1. In this embodiment, two rotating shaft seats are arranged on the tops of the two supports 1-1. 3-1, the rotating shaft 3 is sleeved on both ends of the rotating shaft seat 3-1, and one of the rotating shafts 3 is located at the end of the two brackets 1-1, and one of the rotating shafts 3 is located in the middle of the two brackets 1-1, so A tightening sprocket 4 is set on the rotating shaft 3, then the tightening sprocket 4 and the rotating shaft 3 can rotate synchronously, and the tightening sprocket 4 on the same support 1-1 is meshed with a tightening chain 5. One end of the two tightening chains 5 is connected to the stacking lifting frame 2. In this embodiment, one end of the two tightening chains 5 is connected to the middle end of the stacking lifting frame 2, and the other ends of the two tightening chains 5 are respectively connected to a tensioning If the cylinders 6 are connected, the ends of the piston rods of the two tightening cylinders 6 are connected to the ends of the tensioning chain 5, and the tensioning chain 5 can pull the piston rods to move back and forth, so that the stacking lifting frame 2 can be lifted and lowered precisely at any height. The two tightening cylinders 6 are scientifically and reasonably selected according to the weight of the stacking crane 2 after being filled with items, so as to ensure that the pulling force of the two tensioning cylinders 6 is greater than the gravity of the stacking lift 2 after being filled with items, and both tensioning cylinders 6 pass through the air pipe The first electromagnetic on-off valve 7 and the two tightening cylinders 6 are also connected to the pressure-regulating overflow valve 8, the one-way valve 9, and the second electromagnetic on-off valve 10 through air pipes, as shown in Figure 2. In this embodiment, The second electromagnetic on-off valve 10 is set to be connected to the air supply system, the first electromagnetic on-off valve 7 is connected to the exhaust pipeline, and a rotating shaft 3 on the two supports 1-1 is equipped with a transmission sprocket 11, and the two transmission The sprockets 11 are all meshed with a vertically arranged elevating rack ring 12. In this embodiment, the transmission sprocket 11 is sleeved on the rotating shaft 3 at the ends of the two supports 1-1, and the transmission sprocket 11 is connected to the pulley through the rotating shaft 3. The tightening sprocket 4 rotates synchronously, and the bottom ends of the two elevating rack rings 12 are all meshed with an elevating sprocket 13. In this embodiment, the diameter of the elevating rack ring 12 is just equal to the height of the support 1-1, and the elevating sprocket 13 Just at the bottoms of the two supports 1-1 respectively, the two elevating sprockets 13 are sleeved on a roller 14 fixed on the two supports 1-1, and then the two elevating sprockets 13 and the rollers 14 rotate synchronously. The roller 14 is connected to a driving source 17 through a unidirectional rotating ratchet mechanism. In this embodiment, the driving source 17 is set as an air cylinder. Since the ratchet mechanism can only rotate in one direction, the driving source 17 can drive the roller 17 intermittently. One-way rotation makes the lifting sprocket 13 drive the transmission sprocket 11 to rotate synchronously, and then realizes the synchronous rotation of the tightening sprocket 4 through the rotating shaft 3. In this embodiment, the ratchet mechanism can only rotate clockwise in one direction. When the roller 14 rotates clockwise, the lifting sprocket 13 is driven The driving sprocket 11 and the tensioning sprocket 4 rotate clockwise, and then the tensioning chain 5 moves down to realize the downward movement of the stacking lifting frame 2 .

The four ends of the stacking lift 2 are all provided with rollers 15 that can roll up and down along the two supports 1-1. Considering that the stacking lift 2 is full of items and the weight is heavy, the rollers 15 at the four ends effectively reduce the weight of the stacking lift 2. 2 and the frictional force between the two supports 1-1, thereby facilitating the stacking lifting frame 2 to move up and down along the two supports 1-1, and at the same time avoiding the large vibration caused by inertia to the frame 1 when the stacking lifting frame 2 descends to the bottom, It is beneficial to prolong the service life of the rack 1 .

A fastening sprocket 16 is provided on the two brackets 1-1 and between the transmission sprocket 11 and the lifting sprocket 13. Considering that the lifting rack ring 12 is evenly stressed, this embodiment sets the fastening sprocket 16 at The middle part of the lifting rack ring 12 ensures that the two lifting rack rings 12 are tight and can rotate smoothly, which is conducive to driving the tension sprocket 4 to rotate synchronously, so as to realize the precise lifting of the stacking lifting frame 2 .

Both supports 1-1 have a stabilizing bar 1-2 that is provided with an inclination. Considering that the stacking lift frame 2 full of articles is heavy, it is very easy to cause a large vibration to the two supports 1-1 when lifting up and down. The rear side of the bracket 1-1 is provided with a stabilizing rod 1-2 arranged obliquely, on the one hand, it ensures the stability of the two brackets 1-1, on the other hand, it ensures that the stacking lifting frame 2 can rise and fall stably, and improves the safety performance of the entire stacking lifting mechanism .

When the present invention is used: the second electromagnetic on-off valve 10 is opened, connected to the air supply system, and the first electromagnetic on-off valve 7 is closed. At this time, the intake air in the two tension cylinders 6 causes the piston rod to be stretched back under force, but Because the tightening sprocket 4 rotating clockwise in one direction pulls the piston rod tightly by tightening the chain 5, the tensioning cylinder 6 cannot be pulled back, so that the stacking lifting frame 2 can accurately stay at a certain position; when the stacking lifting frame 2 is stacked When the article needs to be lowered, the driving source 17 drives the roller 14 to roll clockwise, so that the lifting sprocket 13 drives the transmission sprocket 11 to also rotate clockwise, and then the tightening sprocket 4 rotates clockwise through the rotating shaft 3. Because the driving source 17 The propelling force plus the gravity of the stacking lifting frame 2 is greater than the pulling force of the two tightening cylinders 6, and the piston rods of the two tightening cylinders 6 are pulled out by the tensioning chain 5, and then the stacking lifting frame 2 descends. When the piston rods of the two tensioning cylinders 6 are pulled out, the intake chambers of the two tensioning cylinders 6 are compressed. Due to the effect of the check valve 9, the compressed air cannot return to other air pipes, so that the two tensioning cylinders The pressure in the cavity of 6 increases, and when the pressure is greater than the pressure set by the pressure-regulating overflow valve 8, the gas in the cavity of the two tensioning cylinders 6 is quickly discharged through the pressure-regulating overflow valve 8, so that the cavity of the two tensioning cylinders 6 The internal pressure remains within the set range. After a work cycle finishes, close the first electromagnetic on-off valve 7, open the electromagnetic on-off valve 2 to release the pressure on the two tightening cylinders 6, and the stacking lifting frame 2 falls freely under its gravity.

Of course, the above is only a detailed description of the preferred specific implementation of the present invention in conjunction with the accompanying drawings, and is not intended to limit the scope of the present invention. All equivalent changes made according to the principle, structure and structure of the present invention should be covered by this within the scope of protection of the invention.

Claims (4)

1. Pile up elevating system based on invariable pulling force of cylinder, its characterized in that: including frame (1), frame (1) is equipped with between two supports (1-1) including left and right symmetry setting and piles up crane (2) that can follow it and reciprocate between two supports (1-1), and (1-1) top symmetry of two supports is equipped with a plurality of pivot (3), all overlap in pivot (3) and be equipped with a taut sprocket (4), and taut sprocket (4) that are located on same support (1-1) all are connected with a taut chain (5) meshing, and the one end of two taut chains (5) all is connected with piling up crane (2), and the other end of two taut chains (5) is connected with a taut cylinder (6) respectively, and two taut cylinders (6) all pass through trachea and first electromagnetism on-off valve (7), and two taut cylinders (6) still all pass through the trachea respectively with pressure regulating overflow valve (8), check valve (9), The second electromagnetic on-off valve (10) is connected, a rotating shaft (3) on the two supports (1-1) is sleeved with a transmission chain wheel (11), the two transmission chain wheels (11) are all meshed with a vertical lifting rack ring (12), the bottom ends of the two lifting rack rings (12) are all meshed with a lifting chain wheel (13), a rolling shaft (14) fixed on the two supports (1-1) is sleeved between the two lifting chain wheels (13), and the rolling shaft (14) is connected with a driving source (17) through a ratchet mechanism with one-way rotation.

2. The cylinder constant tension based stacking lifting mechanism of claim 1, wherein: four ends of the stacking lifting frame (2) are provided with idler wheels (15) capable of rolling up and down along the two supports (1-1).

3. The cylinder constant tension based stacking lifting mechanism of claim 2, wherein: a fastening chain wheel (16) is arranged on the two brackets (1-1) and between the transmission chain wheel (11) and the lifting chain wheel (13).

4. The stacking and lifting mechanism based on the cylinder constant tension force as claimed in any one of claims 1 to 3, wherein: the two brackets (1-1) are respectively provided with a stabilizing rod (1-2) which is obliquely arranged.