CN210464402U

CN210464402U - Workpiece in-place detection device for roller bed

Info

Publication number: CN210464402U
Application number: CN201921263021.7U
Authority: CN
Inventors: 沈迪; 喻志远; 曹建忠; 董丹义; 王建龙; 陈亮
Original assignee: Shanghai Institute of Electromechanical Engineering
Current assignee: Shanghai Institute of Electromechanical Engineering
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-05-05
Anticipated expiration: 2029-08-06

Abstract

The utility model discloses a workpiece in-place detection device for a roller bed, which comprises a mechanical pressure lever, a pulley block, a balancing weight (3) and an inductor; the mechanical compression bar comprises an upper end (11), a lower end (12) and a middle part (13) with a rotating shaft, the upper end and the lower end can synchronously rotate around the rotating shaft, and the middle part is fixedly arranged at one end of the table top (6) of the roller bed; the pulley block comprises a fixed pulley, a movable pulley and a steel wire rope; the fixed pulley is arranged on the roller bed supporting part (5) and used for guiding the steel wire rope to enter a normal temperature area from a high temperature area; the movable pulley wheel shaft is drawn by a steel wire rope and used for enlarging the displacement; one end of the steel wire rope is connected with the lower end, and the other end of the steel wire rope is connected with the balancing weight; the counterweight block and the sensor are arranged in the normal temperature area, the steel wire rope pulls the counterweight block to move up and down, and the sensor can detect the position change of the counterweight block; when the front end of the skid (7) moves to the end part of the table top, the upper end of the mechanical pressure rod is pushed to move downwards, the lower end is driven to move upwards, and the lower end pulls the steel wire rope to enable the balancing weight to move upwards.

Description

Workpiece in-place detection device for roller bed

Technical Field

The utility model relates to a detection device in the automobile production is carried, in particular to work piece detection device that targets in place for roller bed.

Background

In a modern coating production line, a roller bed in a high-temperature drying chamber needs to be provided with an inductor (or called an induction switch) for detecting whether a workpiece is in place. Because the temperature can reach 200 ℃ when the high-temperature drying chamber is produced, a high-temperature resistant inductor is usually adopted. Generally, the theoretical detection distance of the high temperature resistant sensor is 10mm, and for non-contact detection, a safety distance of at least 2mm needs to be reserved to prevent touch damage, so the maximum distance of detection available in practical applications is only 8mm, and an object to be detected (such as a skid) is repeatedly operated in a high-temperature and low-temperature working environment, and is easily deformed, and if the deformation degree exceeds the available detection range, the detection is directly failed. Once a fault occurs, maintenance treatment is carried out after production line equipment is shut down and cooled, fault elimination can be confirmed after the maintenance is finished and the equipment is started up, heated and normally works, and the time spent is more than 6 hours. Therefore, stricter requirements are put on the fault rate index of the inductor and the deformation controllable index of the detected object. In addition, the high temperature resistant inductor has a high price, for example, the cost of the inductor resistant to 250 ℃ is about 60 times that of the ordinary inductor, so that the cost of components is greatly increased.

Under the effect of the above-mentioned multiple factors, prior art hardly satisfies the requirement that equipment reliability is higher, easy to maintain to components and parts cost is lower simultaneously.

Disclosure of Invention

An object of the utility model is to provide a work piece detection device that targets in place for roller bed, this work piece detection device that targets in place realize the work piece detection that targets in place through the assembly pulley in normal atmospheric temperature region to be amplified by the displacement of detection object, weakened and deformed the interference to the detection by the detection object, and effectively reduced fault rate and cost.

The utility model discloses a realize like this:

a workpiece in-place detection device for a roller bed is characterized in that the roller bed is placed on the ground of a high-temperature area, the roller bed comprises a table top and a supporting part, the table top is arranged on the supporting part, a skid is placed on the table top, and a normal-temperature area isolated from the high-temperature area is arranged below the supporting part;

the workpiece in-place detection device comprises a mechanical compression bar, a pulley block, a balancing weight and a sensor; the mechanical compression bar comprises an upper end, a lower end and a middle part with a rotating shaft, the upper end and the lower end can synchronously rotate around the rotating shaft, and the middle part is fixedly arranged at one end of the table top of the roller bed; the pulley block comprises a plurality of fixed pulleys, movable pulleys and a steel wire rope; the fixed pulley is arranged on the supporting part and used for guiding the steel wire rope to enter a normal temperature area from a high temperature area; the movable pulley wheel shaft is drawn by a steel wire rope and used for enlarging the displacement; one end of the steel wire rope is connected with the lower end of the mechanical compression bar, and the other end of the steel wire rope is connected with the balancing weight; the counterweight block and the sensor are arranged in the normal temperature area, the counterweight block can move up and down under the traction of the steel wire rope, and the sensor can detect the position change of the counterweight block;

when the front end of the skid bearing the workpiece moves to the end part of the table top, the upper end of the mechanical pressure rod can be pushed to move downwards, the lower end of the mechanical pressure rod is driven to move upwards, and the lower end pulls the steel wire rope to enable the balancing weight to move upwards.

One end of the supporting part below the mechanical pressure rod comprises a top surface and a side surface; the pulley block comprises a first fixed pulley, a second fixed pulley, a third fixed pulley, a fourth fixed pulley, a movable pulley, a first steel wire rope and a second steel wire rope; the first fixed pulley and the second fixed pulley are sequentially arranged on the upper side of the top surface of the supporting part along the advancing direction of the skid and are positioned below the mechanical pressure rod, the second fixed pulley horizontally extends out of the top surface of the supporting part through a support, one end of a first steel wire rope is connected with the lower end of the mechanical pressure rod, the other end of the first steel wire rope sequentially rounds the first fixed pulley downwards and rounds the second fixed pulley upwards and is connected with a wheel shaft of the movable pulley, and the movable pulley is suspended below the second fixed pulley; the third fixed pulley sets up in the below of movable pulley, and the fourth fixed pulley sets up in the normal atmospheric temperature region of supporting part below, and second wire rope's one end rigid coupling is in the side of supporting part, and the other end walks around movable pulley, third fixed pulley in proper order, then passes the supporting part side, is connected with the balancing weight after walking around the fourth fixed pulley again, and the balancing weight hangs in the below of fourth fixed pulley.

The inductor comprises a first induction element and a second induction element which are respectively arranged at the low position and the high position of the balancing weight.

And the upper end of the mechanical pressure lever is provided with a roller.

The workpiece in-place detection device for the roller bed copies the displacement of the detected object from a high-temperature area to a normal-temperature area through the fixed pulleys in the pulley block, and moves the inductor to the normal-temperature area, thereby solving the problem that components such as a conventional inductor cannot resist high temperature; meanwhile, the moving distance is amplified through the movable pulleys in the pulley block, and the influence of deformation of the detected object in high and low temperature environment change on detection is reduced. The pulley block is of a mechanical structure, can keep normal work in a temperature range of minus 10 ℃ to 300 ℃, has extremely low fault probability and improves the operation reliability of the whole equipment. The high temperature resistant inductor replacement of originally working in the high temperature region is the ordinary inductor of work in the normal atmospheric temperature region, has not only reduced components and parts cost, and inductor and balancing weight work are influenced by the temperature in the normal atmospheric temperature region for a short time simultaneously, have guaranteed detection effect, even break down, it is also comparatively convenient to overhaul and change.

Compared with the prior art, the utility model, following beneficial effect has: the influence of the deformation of the detected object on the displacement detection is reduced, the detection effect is ensured, a high-temperature-resistant sensor is not needed, and the failure rate and the component cost are reduced.

Drawings

FIG. 1 is a schematic structural diagram of a workpiece in-place detection device for a roller bed of the present invention before the workpiece is in place;

fig. 2 is a schematic structural diagram of the workpiece after the workpiece is in place.

In the figure, 11 upper ends, 12 lower ends, 13 middle parts, 21 first fixed pulleys, 22 second fixed pulleys, 23 third fixed pulleys, 24 fourth fixed pulleys, 25 movable pulleys, 26 first steel wire ropes, 27 second steel wire ropes, 3 balancing weights, 41 first sensing element bases, 42 second sensing elements, 5 supporting parts, 6 table boards and 7 skids.

Detailed Description

The invention will be further explained with reference to the drawings and the specific embodiments.

Referring to fig. 1, a workpiece in-place detection device for a roller bed, the roller bed is placed on the ground of a high-temperature area, the roller bed comprises a table top 6 and a supporting portion 5, the table top 6 is arranged on the supporting portion 5, a skid 7 is placed on the table top 6, the supporting portion 5 is a heat insulation component, one end of the supporting portion 5 comprises a top surface and a side surface, and the inner space surrounded by the top surface and the side surface is arranged to be a normal-temperature area isolated from the high-temperature area. The workpiece in-place detection device comprises a mechanical compression bar, a pulley block, a balancing weight 3 and a sensor.

The mechanical compression bar comprises an upper end 11, a lower end 12 and a middle part 13 with a rotating shaft, wherein the upper end 11 and the lower end 12 can synchronously rotate around the rotating shaft, and the middle part 13 is fixedly arranged at one end of the table top 6 of the roller bed. The upper end 11 of the mechanical strut is provided with rollers to assist the passage of the skid 7 through the upper end 11 of the mechanical strut.

The pulley block comprises a first fixed pulley 21, a second fixed pulley 22, a third fixed pulley 23, a fourth fixed pulley 24, a movable pulley 25, a first steel wire rope 26 and a second steel wire rope 27. The first fixed pulley 21 and the second fixed pulley 22 are sequentially arranged on the upper side surface of the top surface of the supporting part 5 along the advancing direction of the skid, the first fixed pulley 21 and the second fixed pulley 22 are positioned below the mechanical pressure lever, the second fixed pulley 22 horizontally extends out of the top surface of the supporting part 5 through a support, one end of a first steel wire rope 26 is connected with the lower end 12 of the mechanical pressure lever, the other end of the first steel wire rope sequentially rounds downwards the first fixed pulley 21 and upwards the second fixed pulley 22 and is connected with a wheel shaft of a movable pulley 25, and the movable pulley 25 is suspended below the second fixed pulley 22 and is positioned on the outer side surface of the supporting part 5; third fixed pulley 23 sets up in the outside of supporting part 5 side and is located the below of movable pulley 25, fourth fixed pulley 24 sets up the normal atmospheric temperature region below supporting part 5, the inboard of supporting part 5 side promptly, third fixed pulley 23 and fourth fixed pulley 24 are equivalent from ground height, the lateral surface of supporting part 5 is connected to the one end of second wire rope 27 and the tie point is located the below of movable pulley 25, the other end walks around movable pulley 25, third fixed pulley 23 in proper order, then pass the side of supporting part 5, it is connected with balancing weight 3 after walking around fourth fixed pulley 24 again, balancing weight 3 hangs in the below of fourth fixed pulley 24, balancing weight 3 can reciprocate under the traction of second wire rope 27.

The sensor includes a first sensing element 41 and a second sensing element 42, which are respectively disposed at a low position and a high position of the weight block 3, for detecting a position change of the weight block 3.

In this embodiment, the mechanical compression bar is disposed in the high temperature region. The plurality of fixed pulleys are provided outside and inside the side surfaces of the support portion 5 for guiding the wire rope from a high temperature region to a normal temperature region. The axle of the movable pulley 25 is pulled by the first steel wire rope 26, and the moving distance of the first steel wire rope 26 is amplified by using the working principle of the movable pulley, and theoretically, the moving distance can be amplified by two times. The balancing weight 3 and the inductor are arranged in the normal temperature area.

Referring to fig. 1, when the skid 7 carrying the workpiece does not act on the upper end 11 of the mechanical compression bar, the upper end 11 of the mechanical compression bar extends out of the table top 6, the lower end 12 of the mechanical compression bar abuts against the first fixed pulley 21, the counterweight block 3 is at a low position, the first sensing element 41 detects the counterweight block 3, and the sensor indicates that the workpiece is not in place.

Referring to fig. 2, when the skid 7 moves forward, touches the upper end 11 and applies a downward force to the upper end 11, the upper end 11 moves downward around the rotating shaft under the action of the gravity of the skid 7 and the workpiece, and drives the lower end 12 to move upward, the lower end 12 drives the first steel wire rope 26 to move so as to draw the movable pulley 25 to move upward, the moving distance of the movable pulley 25 on the second steel wire rope 27 is twice (theoretical value) of the moving distance of the wheel shaft of the movable pulley 25, so that the counterweight block 3 moves upward by twice of the moving distance of the movable pulley 25, when the upper end 11 is completely under the skid 7, the upper end 11 stops moving downward, the lower end 12 stops moving upward, so that the counterweight block 3 also stops moving and remains at a high position, the second sensing element 42 detects the counterweight block 3, and the sensor indicates that the workpiece is at a high position.

When the sledge 7 passes through the upper end 11 of the mechanical compression bar, the upper end 11 loses the downward force action, and meanwhile, the lower end 12 is acted by the downward force under the action of the gravity of the counterweight block 3, so that the mechanical compression bar returns to the original position. The force action produced by the counterweight 3 can also be realized through the spring elasticity action to adapt to different structure application occasions.

The utility model discloses an assembly pulley shifts the object that the work piece detected in place to the normal atmospheric temperature region, utilizes the theory of operation of movable pulley to enlarge the displacement simultaneously, has avoided being detected the adverse effect that the object takes place to warp to the detection under the normal atmospheric temperature environment. Although the added pulley block mechanical structure is increased in cost to a certain extent, the mechanical structure is simple and easy to obtain, most of the mechanical structure is standard components, and the inductor adopts common components, so that the total cost is far lower than the technical scheme of adopting a high-temperature-resistant inductor. In addition, the method has substantial improvement in the aspect of fault maintenance, the requirement of the deformation controllable index of the detected object can be properly relaxed, and the counterweight block does not have deformation risk when being used as the detected object in a normal temperature environment. The utility model discloses can be applicable to the comparatively harsh application scene of environmental condition, especially be fit for in the operational environment of coating line such as high temperature, high humidity, explosion-proof.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, therefore, any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. A workpiece in-place detection device for a roller bed is characterized in that the roller bed is placed on the ground of a high-temperature area and comprises a table top (6) and a supporting part (5), the table top (6) is arranged on the supporting part (5), a skid (7) is placed on the table top (6), and a normal-temperature area isolated from the high-temperature area is arranged below the supporting part (5); the method is characterized in that:

the workpiece in-place detection device comprises a mechanical compression bar, a pulley block, a balancing weight (3) and a sensor; the mechanical compression bar comprises an upper end (11), a lower end (12) and a middle part (13) with a rotating shaft, the upper end (11) and the lower end (12) can synchronously rotate around the rotating shaft, and the middle part (13) is fixedly arranged at one end of the table top (6) of the roller bed; the pulley block comprises a plurality of fixed pulleys, movable pulleys and a steel wire rope; the fixed pulley is arranged on the supporting part (5) and used for guiding the steel wire rope to enter a normal temperature area from a high temperature area; the movable pulley wheel shaft is drawn by a steel wire rope and used for enlarging the displacement; one end of the steel wire rope is connected with the lower end (12) of the mechanical compression bar, and the other end of the steel wire rope is connected with the balancing weight (3); the counterweight block (3) and the sensor are arranged in a normal-temperature area, the counterweight block (3) can move up and down under the traction of the steel wire rope, and the sensor can detect the position change of the counterweight block (3);

when the front end of a skid (7) bearing a workpiece moves to the end part of the table top (6), the upper end (11) of the mechanical pressure rod can be pushed to move downwards, the lower end (12) of the mechanical pressure rod is driven to move upwards, and the lower end (12) pulls the steel wire rope to enable the balancing weight (3) to move upwards.

2. The workpiece in-position detecting device for the roller machine as claimed in claim 1, wherein: one end of the support part (5) below the mechanical compression bar comprises a top surface and a side surface; the pulley block comprises a first fixed pulley (21), a second fixed pulley (22), a third fixed pulley (23), a fourth fixed pulley (24), a movable pulley (25), a first steel wire rope (26) and a second steel wire rope (27); the first fixed pulley (21) and the second fixed pulley (22) are sequentially arranged on the upper side of the top surface of the supporting part (5) along the advancing direction of the skid and are positioned below the mechanical pressure lever, the second fixed pulley (22) horizontally extends out of the top surface of the supporting part (5) through a support, one end of a first steel wire rope (26) is connected with the lower end (12) of the mechanical pressure lever, the other end of the first steel wire rope sequentially rounds downwards the first fixed pulley (21) and upwards the second fixed pulley (22) and is connected with a wheel shaft of a movable pulley (25), and the movable pulley (25) is suspended below the second fixed pulley (22); third fixed pulley (23) set up in the below of movable pulley (25), and fourth fixed pulley (24) set up in the normal atmospheric temperature region of supporting part (5) below, and movable pulley (25), third fixed pulley (23) are walked around in proper order to the one end rigid coupling of second wire rope (27) in the side of supporting part (5), the other end, then pass supporting part (5) side, are connected with balancing weight (3) after walking around fourth fixed pulley (24) again, and balancing weight (3) hang in the below of fourth fixed pulley (24).

3. The workpiece in-position detecting device for the roller machine as claimed in claim 1, wherein: the sensor comprises a first sensing element (41) and a second sensing element (42) which are respectively arranged at the low position and the high position of the balancing weight (3).

4. The workpiece position detection apparatus for the roller bed according to any one of claims 1 to 3, wherein: and the upper end (11) of the mechanical pressure lever is provided with a roller.