Roller way limiting device and sand box transfer system

Abstract

The utility model discloses a roller way limiting device and a sand box transfer system, and belongs to the field of casting production line equipment. According to the technical scheme, the roller way limiting device comprises an installation base, a stopping arm is installed on the installation base in a hinged mode, the stopping arm is in a step shape and comprises a transverse section, an upper vertical section and a lower vertical section, and the upper vertical section and the lower vertical section are located at the two ends of the transverse section respectively; the transverse section is hinged to the mounting base, and an overturning driving structure is arranged between the lower vertical section and the mounting base. According to the scheme, an overturning lifting type structure is adopted, hard limiting can be formed in the running direction of the base plate after the upper vertical section of the stopping arm is driven by the overturning driving structure to be lifted, the stopping effect can be better achieved, and the base plate is prevented from rushing out of a roller way.

Description

Technical Field

[0001] The utility model relates to the field of casting production line equipment, in particular to a roller limit device and a sand box transfer system. Background Art

[0002] A casting production line is a combination of a series of equipment and process flows used to produce metal castings. This production line can be customized according to the type, scale and precision requirements of the castings to meet different production needs. Among them, the sand casting production line is one of the most traditional casting production methods, mainly suitable for casting large parts, small batches, irregular parts and other fields with a wide range of needs. It has the advantages of flexible process, short production cycle and low raw material cost. The production process includes sand mold making, melting, cleaning, grinding and other links.

[0003] During pouring and cooling in the casting production line, the temperature of the sand box is relatively high during pouring and after pouring. A combination of a manual roller and a pusher is often used. The sand box is placed on a pad, and a pusher head of the pusher applies a thrust to the pad to achieve pouring and transportation of the sand box on the manual roller line. In order to prevent the sand box and the pad from continuing to move forward due to inertia after the pad is in place, which may cause it to rush out of the roller, a device to limit the pad position needs to be added to the manual roller at the exit end of the roller line.

[0004] At present, the method to prevent the sand box from rushing out of the roller table is mainly to add a cylinder clamping device to the manual roller table, clamp the two sides of the pad, and rely on the friction between the clamping device and the pad to position the sand box. However, insufficient friction often occurs, causing the sand box to rush out of the roller table. Summary of the invention

[0005] The utility model provides a roller table limiting device to solve the problem that the existing friction clamping type positioning structure is prone to insufficient friction.

[0006] In order to solve the above problems, the technical solution adopted by the utility model is a roller conveyor limit device, comprising a mounting seat, a stop arm is hingedly mounted on the mounting seat, the stop arm is stepped, the stop arm comprises a horizontal section, an upper vertical section and a lower vertical section, the upper vertical section and the lower vertical section are respectively located at the two ends of the horizontal section; the horizontal section is hinged to the mounting seat, and a flip driving structure is provided between the lower vertical section and the mounting seat. This solution adopts a flip lifting structure, and after the upper vertical section of the stop arm is driven to lift up by the flip driving structure, a hard limit can be formed in the running direction of the pad, which can better achieve the stopping effect and prevent the pad from rushing out of the roller conveyor.

[0007] Preferably, a hinge seat is provided on the top of the mounting seat, and the stop arm is hinged on the hinge seat. The hinge point of the stop arm is moved upward relative to the mounting seat, thereby increasing the height of the upper vertical section and obtaining a larger range of motion.

[0008] Preferably, the flip driving structure comprises a telescopic cylinder, a cylinder connecting seat is provided at the bottom of the mounting seat, and two ends of the telescopic cylinder are respectively hinged to the cylinder connecting seat and the lower vertical section.

[0009] Preferably, a weight-increasing structure is further provided on the lower vertical section, and the hinge point between the stop arm and the mounting seat is arranged on one side of the horizontal section close to the upper vertical section. The weight-increasing structure is provided so that the center of gravity of the stop arm is biased toward the lower vertical section, so that the stop arm can maintain a raised limited state after the air source of the telescopic cylinder fails unexpectedly, thereby improving safety.

[0010] Preferably, the weight-increasing structure includes at least one counterweight block, which is detachably mounted on the lower vertical section by bolts. The weight-increasing structure is a detachable structure, which can be removed or its weight can be changed as needed.

[0011] Preferably, the articulated seats are provided with two, the two articulated seats are rotatably mounted with a rotating shaft, the stop arm is fixedly mounted in the middle of the rotating shaft and located between the two articulated seats. The rotating shaft adopts a two-end support structure to improve the impact resistance of the limit device.

[0012] On the other hand, the utility model also provides a sand box transfer system, including a roller and a pad, the roller includes a frame and a plurality of rollers installed on the top of the frame, the pad is in rolling contact with the outer surface of the roller; the frame is installed with the above-mentioned roller limit device, when the stop arm is in the first flipping state, the upper end of the upper vertical section is higher than the highest point of the roller, when the stop arm is in the second flipping state, the upper end of the upper vertical section is lower than the highest point of the roller. The roller of the transfer system is installed with the above-mentioned hard limit limit device, which is safer.

[0013] Preferably, the stop arm further comprises an inclined section, a first end of the inclined section is connected to the horizontal section, a second end of the inclined section extends obliquely downward of the horizontal section, and an upper end of the lower vertical section is connected to the second end of the inclined section. Moving the lower vertical section downward can reduce position interference with adjacent rollers and increase the range of motion of the stop arm.

[0014] Preferably, a baffle is further provided on the bottom surface of the pad, and the baffle is located in a vertical plane and perpendicular to the conveying direction of the pad.

[0015] Preferably, in the running direction of the pad, the lower vertical section is located at one end of the horizontal section facing the pad, thereby optimizing the force structure, reducing the impact force on the limit device, and facilitating the downward release of the stop arm.

[0016] It can be seen from the above technical scheme that the advantages of the utility model are that the present scheme adopts a hard limit structure on the roller conveyor, and relies on the cylinder to control the stop arm to reach the working position, forming a barrier on the travel path of the pad, and more effectively realizing the limit; at the same time, the structural design, the stop arm has a larger range of motion, and the center of gravity of the stop arm is adjusted by setting a weight-increasing structure. Even if the cylinder loses power, the counterweight block installed on the stop arm can be relied on to rotate the front end of the stop arm to be higher than the roller surface, thereby blocking the pad and preventing the pad and the sand box from rushing out of the roller conveyor; therefore, the sand box transfer system provided by the utility model has higher safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic structural diagram of the first embodiment of the present utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the second embodiment of the utility model. Figure 1 .

[0020] Figure 3 This is a schematic diagram of the structure of the second embodiment of the utility model. Figure 2 .

[0021] Description of main reference numerals

[0022] 1. Mounting seat, 2. Articulated seat, 3. Rotating axis, 4. Stop arm, 4-1. Horizontal section, 4-2. Upper vertical section, 4-3. Lower vertical section, 4-4. Inclined section, 5. Telescopic cylinder, 6. Counterweight, 7. Air source, 8. Pad, 9. Frame, 10. Roller, 11. Baffle. DETAILED DESCRIPTION

[0023] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0024] Embodiment 1

[0025] like Figure 1As shown, a roller limit device comprises a mounting seat 1, which is a square frame structure formed by welding square steel pipes in a staggered manner in the horizontal and vertical directions, and a stop arm 4 is hingedly installed on the mounting seat 1. Specifically, two hinged seats 2 are installed on the upper surface of the mounting seat 1, and the stop arm 4 is a stepped flat plate structure, and the width is located in the vertical plane, including a lower vertical section 4-3, an inclined section 4-4, a horizontal section 4-1 and an upper vertical section 4-2 connected in sequence, the upper vertical section 4-2 is located in the first section of the horizontal section 4-1, and extends upward relative to the top edge of the horizontal section 4-1, the first end of the inclined section 4-4 is connected to the second end of the horizontal section 4-1, the second end of the inclined section 4-4 extends obliquely downward to the horizontal section, and the inclined section 4-4 and the horizontal section 4-1 are at an obtuse angle, the upper end of the lower vertical section 4-3 is connected to the second end of the inclined section 4-4, and the lower end of the lower vertical section 4-3 extends downward. A rotating shaft 3 is installed on the transverse section 4 - 1 , and the rotating shaft 3 passes through the transverse section 4 - 1 and is fixedly connected to the transverse section 4 - 1 . Two hinge seats 2 are provided on the upper surface of the mounting seat 1 , and both ends of the rotating shaft 3 are rotatably installed in the two hinge seats 2 .

[0026] A flipping drive structure is provided between the lower vertical section 4-3 and the mounting seat 1. In the present embodiment, the flipping drive structure comprises a telescopic cylinder 5. A cylinder connecting seat is provided at the bottom of the mounting seat 1. Both ends of the telescopic cylinder 5 are respectively hinged to the cylinder connecting seat and the lower vertical section 4-3.

[0027] A weight-increasing structure is also provided on the lower vertical section. In the present embodiment, the weight-increasing structure includes at least one counterweight block 6, which is detachably mounted on the lower vertical section by bolts. By providing the counterweight block, the overall center of gravity of the stop arm is located on the side of the rotating shaft 3 which is biased towards the lower vertical section. Therefore, after the telescopic driving structure loses power, the upper vertical section of the stop arm can remain in a raised state, that is, the stop arm is in a stopping state.

[0028] Embodiment 2

[0029] like Figure 2 , 3 As shown, this embodiment further provides a sand box transfer system, including a roller and a pad 8, the roller includes a frame 9 and a plurality of rollers 10 installed on the top of the frame 9, the pad 8 is in rolling contact with the outer surface of the roller 10, the frame 9 is installed with the roller limit device provided in the first embodiment, the mounting seat 1 is installed in the frame 9 and is located below the roller 10, in the running direction of the pad 8, the lower vertical section is located at the end of the horizontal section 4-1 facing the pad 8, that is, at Figure 2 , Figure 3 In the figure, the arrow from left to right is the movement direction of the pad 8, and in the roller limit device, the upper vertical section is located on the left side of the lower vertical section.

[0030] By flipping the driving structure, the stop arm 4 has a first flipping state and a second flipping state (switching between the two states):

[0031] Figure 3 The first flipping state of the blocking arm 4 is shown. Figure 3 , the telescopic cylinder is in the retracted state, the lower vertical section 4-3 is pulled, the stop arm rotates counterclockwise, the upper end of the upper vertical section 4-2 is higher than the highest point of the roller 10, and the bottom surface of the pad 8 is also provided with a baffle 11, which is located in the vertical plane and perpendicular to the conveying direction of the pad 8. At this time, the upper vertical section contacts the baffle 11, preventing the pad 8 from continuing to move to the right;

[0032] Figure 2 The second flip state is shown. Figure 2 , the telescopic cylinder extends, the stop arm rotates clockwise relative to the first flipping state, the upper end of the upper vertical section 4-2 is lower than the highest point of the roller 10, and the pad can continue to move to the right.

[0033] It can be seen from the above technical scheme that the beneficial effect of the utility model lies in that the scheme adopts a hard limit structure on the roller, relies on the cylinder to control the stop arm to reach the working position, forms an obstruction on the travel path of the pad, and realizes the limit more effectively; at the same time, the structural design, the stop arm has a larger range of motion, and the center of gravity of the stop arm is adjusted by setting a weight-increasing structure. Even if the cylinder loses power, the counterweight block installed on the stop arm can be relied on to rotate the front end of the stop arm to be higher than the roller surface, thereby blocking the pad and preventing the pad and the sand box from rushing out of the roller; therefore, the sand box transfer system provided by the utility model has higher safety.

[0034] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A roller conveyor limiting device, comprising a mounting seat (1), characterized in that: A stop arm (4) is hingedly mounted on the mounting seat (1); the stop arm (4) is stepped; the stop arm (4) comprises a transverse section (4-1), an upper vertical section (4-2) and a lower vertical section (4-3); the upper vertical section (4-2) and the lower vertical section (4-3) are respectively located at two ends of the transverse section (4-1); the transverse section (4-1) is hingedly mounted on the mounting seat (1); and a flip driving structure is provided between the lower vertical section (4-3) and the mounting seat (1).

2. The roller limiter according to claim 1, characterized in that: A hinged seat (2) is provided on the top of the mounting seat (1), and the stop arm (4) is hinged on the hinged seat (2).

3. The roller limiter according to claim 1, characterized in that: The turning drive structure comprises a telescopic cylinder (5), a cylinder connecting seat is provided at the bottom of the mounting seat (1), and two ends of the telescopic cylinder (5) are respectively hinged to the cylinder connecting seat and the lower vertical section (4-3).

4. The roller limiter according to claim 1, characterized in that: A weight-increasing structure is also provided on the lower vertical section, and a hinge point between the stop arm (4) and the mounting seat (1) is arranged on a side of the horizontal section (4-1) close to the upper vertical section (4-2).

5. The roller limiter according to claim 4, characterized in that: The weight-increasing structure comprises at least one counterweight block (6), and the counterweight block (6) is detachably mounted on the lower vertical section by means of bolts.

6. The roller limiter according to claim 2, characterized in that: Two hinged seats (2) are provided, and a rotating shaft (3) is rotatably mounted on the two hinged seats (2) together. The stop arm (4) is fixedly mounted on the middle of the rotating shaft (3) and is located between the two hinged seats (2).

7. A sand box transfer system, comprising a roller conveyor and a pad (8), characterized in that: The roller conveyor comprises a frame (9) and a plurality of rollers (10) mounted on the top of the frame (9), and the pad (8) is in rolling contact with the outer surface of the roller (10); the frame (9) is provided with a roller conveyor limiting device as claimed in any one of claims 1 to 6, and when the stop arm (4) is in a first flipping state, the upper end of the upper vertical section (4-2) is higher than the highest point of the roller (10), and when the stop arm (4) is in a second flipping state, the upper end of the upper vertical section (4-2) is lower than the highest point of the roller (10).

8. The sand box transfer system according to claim 7, characterized in that: The stop arm (4) further comprises an inclined section (4-4), a first end of the inclined section (4-4) being connected to the transverse section (4-1), a second end of the inclined section (4-4) extending obliquely downward of the transverse section (4-1), and an upper end of the lower vertical section (4-3) being connected to the second end of the inclined section (4-4).

9. The sand box transfer system according to claim 7, characterized in that: The bottom surface of the pad (8) is also provided with a baffle (11), and the baffle (11) is located in a vertical plane and perpendicular to the conveying direction of the pad (8).

10. The sand box transfer system according to claim 7, characterized in that: In the running direction of the pad (8), the lower vertical section is located at an end of the transverse section (4-1) facing the pad (8).

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