A guide structure for OHT overhead crane
By designing a guide structure including slide rails, guide wheels and limit blocks, the problem of insufficient precision during steering of OHT SkyT is solved, efficient guidance and precise steering are achieved, and overall performance and life are improved.
Patent Information
- Application Number
- CN202411869580.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-04-08
AI Technical Summary
During operation, due to the large mass and fast speed, it is difficult to ensure that the steering is completely in line with the curve during steering. The lack of effective guidance assistance leads to the center of the sky truck easily deviating from the center of the track, affecting the accuracy of picking and delivery of goods and other operations.
A guide structure including a substrate, a slide rail, a guide wheel, an electromagnetic motor, a lever, a guide detector and a photoelectric sensor are designed. Through the electromagnetic motor, the lever drives the fork to move the guide wheel on the slide rail, achieving the coordination between the guide wheel and the track assembly, using deep groove ball bearings to reduce friction, limit blocks and buffers to reduce collision noise and damage, and the photoelectric sensor is used to detect the working state of the guide structure.
It improves the accuracy of the trolley when steering, reduces energy loss and friction, extends the life of the guide structure, enhances the adaptability to extreme deviations, and ensures the reliability and controllability of the guide process.
Smart Images
Figure CN119774455A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of an OHT overhead crane, in particular to a guide structure for an OHT overhead crane. Background Art
[0002] In the field of modern industrial production and logistics, automated transportation equipment plays an increasingly important role. With the continuous development of the manufacturing industry, especially high-tech industries such as semiconductors, the efficiency and precision of material handling and transportation in the production process are extremely high. Automated logistics and transportation equipment can improve production efficiency, reduce labor costs, reduce human errors, and better meet production needs in some special environments such as dust-free workshops. OHT (Overhead Hoist Transporter) is an automated logistics and transportation equipment, which is mostly used in industrial production lines of semiconductor plants. It is also commonly used in warehousing, logistics centers and other places in related industries for handling, transporting and stacking goods. It usually consists of a set of track systems placed on the upper level of the plant, one or more mobile automated transport vehicles and a set of control systems. The transport vehicle can move along the track in the direction of the command, extend or lift the hook left and right at the specified position to transport and stack goods on different levels of shelves or storage areas.
[0003] Since the overhead crane has a large mass and a high speed during operation, it is difficult to ensure that it turns completely along the curve only by relying on its own structure when turning. The lack of effective guiding assistance makes it easy for the center of the overhead crane to deviate from the center of the track after running for a period of time, thereby affecting the accuracy of operations such as picking up and placing goods. Summary of the invention
[0004] In view of the deficiencies in the prior art, the present invention provides a guiding structure for an OHT overhead crane, which solves the problem that the overhead crane has a large mass and a high speed during operation. When turning, it is difficult to ensure that it turns completely along the curve only by relying on its own structure. The lack of effective guiding assistance makes it easy for the center of the overhead crane to deviate from the center of the track after running for a period of time, thereby affecting the accuracy of operations such as picking up and placing goods.
[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a guiding structure for an OHT overhead crane, comprising a base plate, a slide rail is installed in the middle of the base plate, a slide rail cover is arranged on the top of the slide rail, a shift fork is fixedly connected to the outer wall of the slide rail cover, a guide wheel is symmetrically installed on the top of the shift fork, a lever is rotatably connected to the bottom of one side of the shift fork, a guide detection piece is fixedly connected to the top of one side of the lever, a limiting structure is symmetrically installed on the top of the base plate, an electromagnetic motor is fixedly connected to the bottom of the base plate, the output end of the electromagnetic motor passes through the bottom of the base plate and is fixedly connected to the bottom of one side of the lever, and a photoelectric sensor is symmetrically arranged on one side of the top of the base plate.
[0006] Preferably, the limiting structure comprises two limiting blocks, the bottoms of the two limiting blocks are symmetrically mounted on the top of the base plate, and the limiting block stopper is fixedly connected to the opposite side of the limiting block.
[0007] Preferably, a buffer is arranged inside the limit block.
[0008] Preferably, a gasket is connected to the side of the limit block that is away from the limit block.
[0009] Preferably, a guide wheel cover plate is installed on the top of the guide wheel.
[0010] Preferably, a countersunk hole is provided on the top of the substrate.
[0011] Preferably, the guide wheel is a polyurethane rubber-coated wheel.
[0012] Preferably, the interior of the guide wheel is a deep groove ball bearing.
[0013] Working principle: When in use, the guide structure is installed above the overhead crane travel mechanism through the countersunk hole on the base plate, and then when the electromagnetic motor drives the lever to rotate, the guide wheel can be driven to move on the slide rail through the shift fork, so that the guide wheel and the guide rail in the track assembly are matched. At the same time, the guide wheel adopts a polyurethane rubber-coated wheel, which will not cause excessive wear when in contact with other parts, and the deep groove ball bearing inside it can effectively reduce friction and avoid additional burden on the overhead crane operation, thereby reducing the energy loss of the overhead crane during operation. During guiding, the limit block and the buffer inside the limit block cooperate. When the shift fork is running left and right, the buffer can assist the limit block to reduce the shift fork. The collision caused by the fork reduces the noise generated by the mechanism during the left and right guiding process, and also reduces the damage to the structure caused by the collision, thereby increasing the life of the entire guide structure. At the same time, through the cooperation of the guide detection piece photoelectric sensor, when the electromagnetic motor drives the lever to rotate, the guide detection piece moves accordingly. When the guide detection piece enters the detection range of the photoelectric sensor, the photoelectric sensor will transmit a signal to the relevant control system, thereby notifying the control system that the guide structure has been in place to complete the work, accurately detecting and controlling the working status of the guide mechanism, and the electromagnetic motor is easy to control, and will not cause too many obstacles during use, saving debugging costs, so that the guide structure can be easily integrated into the overall operation system of the OHT overhead crane.
[0014] The present invention provides a guide structure for an OHT overhead travelling crane, which has the following beneficial effects:
[0015] 1. The present invention is installed in the middle of the base plate through a slide rail, and the slide rail cover plate on the top is fixedly connected to the fork, and the fork is connected to the guide wheel and the lever, so that when the electromagnetic motor drives the lever to rotate, the guide wheel can be driven to move on the slide rail through the fork, thereby realizing the coordination between the guide wheel and the guide track in the track assembly, solving the problem that the overhead crane has a large mass and a high speed during operation, and it is difficult to ensure that it turns completely according to the curve when turning only by relying on its own structure, and lacks effective guiding assistance, so that the center of the overhead crane is easy to deviate from the center of the track after running for a period of time, thereby affecting the accuracy of operations such as picking up and placing goods, and ensuring the steering accuracy.
[0016] 2. The present invention adopts a polyurethane rubber-coated wheel through the guide wheel, which will not cause excessive wear when contacting other parts. The deep groove ball bearing is inside. When the guide structure plays a guiding role, the deep groove ball bearing can effectively reduce friction and avoid additional burden on the operation of the overhead crane, thereby reducing energy loss during the operation of the overhead crane and improving operation efficiency. The problem that the overall performance of the overhead crane is affected by the large friction of the guide wheel is solved. In addition, a guide wheel cover plate is installed on the top of the guide wheel to seal the guide wheel and the bearing, thereby increasing the service life of the bearing and ensuring the long-term stable working performance of the guide wheel.
[0017] 3. The present invention cooperates the limit block stopper on the opposite side of the limit block with the buffer inside the limit block. When the fork is running left and right, the buffer can assist the limit block stopper to reduce the collision caused by the fork. The existence of the buffer reduces the noise generated by the mechanism during the left and right guiding process, and also reduces the damage to the structure caused by the collision, thereby improving the life of the entire guide structure and solving the problem of structural damage and shortened life due to frequent collisions.
[0018] 4. The gasket of the present invention is used to adjust the relative positions of the slider and the guide wheel in this structure. Since other components may produce cumulative installation errors, gaskets are used for adjustment, and the left and right sides are adjustable at the same time, which enhances the adaptability of the guide structure to extreme deviations and ensures that the guide structure can accurately match the track module, solving the problem of poor matching between the guide structure and the track due to installation errors.
[0019] 5. The present invention cooperates with the guide detection piece and the photoelectric sensor. When the electromagnetic motor drives the lever to rotate, the guide detection piece moves accordingly. When the guide detection piece enters the detection range of the photoelectric sensor, the photoelectric sensor transmits a signal to the relevant control system, thereby notifying the control system that the guide structure has been in place and completed its work, thereby achieving accurate detection and control of the working status of the guide mechanism, ensuring the reliability and controllability of the entire guide process, and the electromagnetic motor is easy to control and will not cause too much obstruction during use, saving debugging costs, so that the guide structure can be easily integrated into the overall operation system of the OHT overhead crane. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A perspective view of the present invention;
[0021] Figure 2 It is a front view structural schematic diagram of the present invention;
[0022] Figure 3 It is a side view structural schematic diagram of the present invention;
[0023] Figure 4 It is a schematic diagram of the local structure of the slide rail of the present invention.
[0024] Among them, 1. Base plate; 2. Guide wheel; 3. Electromagnetic motor; 4. Lever; 5. Guide detection plate; 6. Slide rail; 7. Limit block; 8. Limit block stopper; 9. Slide rail cover; 10. Buffer; 11. Gasket; 12. Photoelectric sensor; 13. Guide wheel cover; 14. Fork. DETAILED DESCRIPTION
[0025] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0026] Example:
[0027] Please refer to the attached Figure 1 -Attached Figure 4 The embodiment of the present invention provides a guide structure for an OHT overhead crane, comprising a base plate 1, a slide rail 6 is installed in the middle of the base plate 1, a slide rail cover plate 9 is arranged on the top of the slide rail 6, a shift fork 14 is fixedly connected to the outer wall of the slide rail cover plate 9, a guide wheel 2 is symmetrically installed on the top of the shift fork 14, a lever 4 is rotatably connected to the bottom of one side of the shift fork 14, a guide detection piece 5 is fixedly connected to the top of one side of the lever 4, a limited position structure is symmetrically installed on the top of the base plate 1, an electromagnetic motor 3 is fixedly connected to the bottom of the base plate 1, and the output end of the electromagnetic motor 3 passes through the bottom of the base plate 1. A photoelectric sensor 12 is symmetrically arranged on one side of the top of the base plate 1 and is fixedly connected to the bottom of one side of the lever 4; the limiting structure includes two limiting blocks 7, the bottoms of the two limiting blocks 7 are symmetrically installed on the top of the base plate 1, and the limiting block stopper 8 is fixedly connected to the opposite side of the limiting block 7; a buffer 10 is arranged inside the limiting block 7; a gasket 11 is connected to the side away from the limiting block 7; a guide wheel cover plate 13 is installed on the top of the guide wheel 2; a countersunk hole is arranged on the top of the base plate 1; the guide wheel 2 adopts a polyurethane rubber-coated wheel; the inside of the guide wheel 2 is a deep groove ball bearing.
[0028] Specifically, it is installed above the overhead crane traveling mechanism through the countersunk hole on the base plate 1. The base plate 1 requires a flatness of about 0.05. This is because if the base plate 1 is warped, the guide wheel 2 installed thereon will be skewed, thereby affecting the accuracy of the entire guide structure. The slide rail 6 is installed in the middle of the base plate 1, and the slide rail cover plate 9 on the top is fixedly connected to the fork 14, and the fork 14 is connected to the guide wheel 2 and the lever 4. This connection method enables the guide wheel 2 to move on the slide rail 6 through the fork 14 when the electromagnetic motor 3 drives the lever 4 to rotate, thereby achieving the coordination between the guide wheel 2 and the guide track in the track assembly, solving the problem that the overhead crane has a large mass and a high speed during operation. When turning, it is difficult to ensure that it turns completely according to the curve only by relying on its own structure. The lack of effective guiding assistance makes it easy for the center of the overhead crane to deviate from the center of the track after running for a period of time, thereby affecting the accuracy of operations such as picking up and placing goods, thereby ensuring the steering accuracy.
[0029] The guide wheel 2 is made of a polyurethane rubber-coated wheel. This material has a certain hardness and will not cause excessive wear when in contact with other parts. At the same time, polyurethane is a material commonly used in clean workshops and meets the requirements of clean workshops in semiconductor factories. The guide wheel 2 has a deep groove ball bearing inside. When the guide structure plays a guiding role, the deep groove ball bearing can effectively reduce friction and avoid additional burden on the operation of the overhead crane, thereby reducing energy loss during the operation of the overhead crane and improving operation efficiency. The problem of the overall performance of the overhead crane being affected by the large friction of the guide wheel 2 is solved, and a guide wheel cover plate 13 is installed on the top of the guide wheel 2 to seal the guide wheel 2 and the bearing, thereby increasing the service life of the bearing and ensuring the long-term stable working performance of the guide wheel 2.
[0030] Four limit blocks 7 are symmetrically installed on the top of the base plate 1. The limit block stopper 8 on the opposite side of the limit block 7 cooperates with the buffer 10 inside the limit block 7. When the fork 14 is running left and right, the buffer 10 can assist the limit block stopper 8 to reduce the collision caused by the fork 14. The existence of the buffer 10 reduces the noise generated by the mechanism during the left and right guiding process, and also reduces the damage to the structure caused by the collision, thereby improving the life of the entire guide structure and solving the problem of structural damage and shortened life due to frequent collisions. The gasket 11 connected to the side away from the limit block 7 is used to adjust the relative position of the slider 6 and the guide wheel 2 in this structure. Before formal use, since other components may produce cumulative installation errors, a 0.5mm gasket 11 is used for adjustment, and the left and right sides are adjustable at the same time, which enhances the adaptability of the guide structure to extreme deviations, ensures that the guide structure can accurately cooperate with the track module, and solves the problem of poor cooperation between the guide structure and the track due to installation errors.
[0031] Through the cooperation of the guide detection piece 5 on the top of one side of the lever 4 and the photoelectric sensor 12 symmetrically arranged on the top side of the base plate 1, when the electromagnetic motor 3 drives the lever 4 to rotate, the guide detection piece 5 moves accordingly. When the guide detection piece 5 enters the detection range of the photoelectric sensor 12, the photoelectric sensor 12 will transmit a signal to the relevant control system, thereby notifying the control system that the guide structure has been in place to complete the work. In this way, accurate detection and control of the working state of the guide mechanism is achieved, and the problem of being unable to effectively judge whether the guide mechanism is in place is solved, ensuring the reliability and controllability of the entire guiding process. The electromagnetic motor 3 is easy to control and will not cause too much obstruction during use, saving the debugging cost, so that the guide structure can be easily integrated into the overall operation system of the OHT overhead crane.
[0032] The following is further introduced in conjunction with specific embodiments:
[0033] Embodiment 1:
[0034] As attached Figure 4 As shown, the guide mechanism is installed above the overhead traveling mechanism through a countersunk hole, and the flatness of the base plate 1 is required to be about 0.05 to prevent the base plate 1 from warping up and causing the guide wheel 2 to be installed crookedly, thus affecting the structural accuracy.
[0035] The guide wheel 2 has a deep groove ball bearing inside, so that when this structure plays a guiding role, it does not increase the friction force and increase the operating burden of the overhead crane. At the same time, a cover plate is used to seal the guide wheel 2 and the bearing to increase the bearing life. In the position shown in the figure, it can be seen that the guide detection piece has entered the detection range of the photoelectric sensor 12. At this time, the control system can be used to detect whether this structure is operating normally. It should be noted that before the formal use of this structure, it is necessary to verify whether this structure can fit with the guide part in the track module when installed on the overhead crane. Since other components will produce cumulative installation errors, we use a 0.5MM gasket 11 for adjustment; the left and right sides are adjustable at the same time, which enhances the adaptability of this structure to extreme deviations. In addition, the guide wheel 2 uses a polyurethane rubber-coated wheel, which has a certain hardness and will not cause wear to other parts. Polyurethane material is also a material commonly used in clean workshops, which is more in line with the requirements of semiconductor plant clean workshops.
[0036] In addition, the limit block 7 is also installed using a long waist hole, which effectively improves the adaptability of the structure in various scenarios and reduces the difficulty of adjusting the structure.
[0037] The lever 4 is connected to the shift fork 14 by a roller cam guide, which is not easy to fall off and also ensures the rotation requirement.
[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A guide structure for an OHT overhead travelling crane, characterized in that: The invention comprises a base plate (1), a slide rail (6) is installed in the middle of the base plate (1), a slide rail cover plate (9) is arranged on the top of the slide rail (6), a shift fork (14) is fixedly connected to the outer wall of the slide rail cover plate (9), a guide wheel (2) is symmetrically installed on the top of the shift fork (14), a lever (4) is rotatably connected to the bottom of one side of the shift fork (14), a guide detection plate (5) is fixedly connected to the top of one side of the lever (4), a limiting structure is symmetrically installed on the top of the base plate (1), an electromagnetic motor (3) is fixedly connected to the bottom of the base plate (1), the output end of the electromagnetic motor (3) passes through the bottom of the base plate (1) and is fixedly connected to the bottom of one side of the lever (4), and a photoelectric sensor (12) is symmetrically arranged on one side of the top of the base plate (1).
2. The guide structure for an OHT overhead travelling crane according to claim 1, characterized in that: The limiting structure comprises two limiting blocks (7), the bottoms of the two limiting blocks (7) are symmetrically mounted on the top of the base plate (1), and the limiting block stopper (8) is fixedly connected to the opposite side of the limiting block (7).
3. The guide structure for an OHT overhead travelling crane according to claim 2, characterized in that: A buffer (10) is arranged inside the limit block (7).
4. The guide structure for an OHT overhead travelling crane according to claim 2, characterized in that: A gasket (11) is connected to the side of the limiting block (7) that is away from the limiting block (7).
5. The guide structure for an OHT overhead travelling crane according to claim 1, characterized in that: A guide wheel cover plate (13) is installed on the top of the guide wheel (2).
6. The guide structure for an OHT overhead travelling crane according to claim 1, characterized in that: A countersunk hole is provided on the top of the substrate (1).
7. The guide structure for an OHT overhead travelling crane according to claim 1, characterized in that: The guide wheel (2) is a polyurethane rubber-coated wheel.
8. The guide structure for an OHT overhead travelling crane according to claim 1, characterized in that: The interior of the guide wheel (2) is a deep groove ball bearing.