Belt fracture detection device and OHT lifting equipment

Abstract

The utility model relates to the field of belt conveying, in particular to a belt fracture detection device and OHT lifting equipment, according to the belt fracture detection device, an adjusting wheel is arranged on a movable part capable of rotating, a swing arm is arranged on the movable part, a belt makes contact with the lower surface of the adjusting wheel in the lifting work, and when the belt is not fractured, the swing arm is arranged on the lower surface of the adjusting wheel; when the belt is broken, the adjusting wheel keeps the movable part and the swing arm in a fixed state under the upward acting force of the belt, when the belt is broken, the adjusting wheel breaks away from the acting force of the belt and falls down, then the movable part and the swing arm swing, the detection assembly makes an alarm response by detecting swing of the swing arm, and then breakage of the belt is rapidly and effectively detected. The device directly acts on the belt and can quickly respond according to the breakage condition of the belt, the breakage condition of the belt is quickly and effectively detected, and safety guarantee is provided for belt lifting operation.

Description

Technical Field

[0001] The present application relates to the field of belt transmission, and relates to a belt breakage detection device and an OHT lifting device. Background Art

[0002] Belt transmission is one of the most widely used transmission methods in current industrial production, and has the advantages of strong transportation capacity, stable operation, and simple structure. With the acceleration of the national automation process, the use of high-load, intelligent, and high-speed belt transportation equipment will be more common. In the overhead crane rail system in the semiconductor industry, in order to quickly and smoothly lift the OHT cart from the ground to the top rail, the method of belt lifting has been widely used to realize the lifting and transportation of the OHT cart.

[0003] However, the biggest problem with belt lifting is the small load. Generally, the load of a conventional polyurethane belt is 40 - 80 kg, and the load capacity of a rubber belt is even weaker. In order to increase the load capacity, a composite material filled with steel cores is usually selected as the lifting belt to improve the load performance of the belt as much as possible, but there is still a risk of belt breakage. If the belt breaks during transmission work and is not detected in time, it will cause the OHT cart to slide, which will very likely cause harm or even casualties to the ground operators. Therefore, a belt breakage detection device needs to be set up so that once a belt breakage accident occurs, the information can be quickly transmitted to the alarm unit for sound and light alarm, providing as much reaction time as possible for the operators. Utility Model Content

[0004] In order to solve or at least partially solve the above technical problems, the present application provides a belt breakage detection device, including:

[0005] A movable member, which is installed on a fixed frame through a rotating shaft, and the movable member is provided with an adjusting wheel and a swing arm;

[0006] Wherein, the lower surface of the adjusting wheel is adapted to contact the belt. When the belt does not break, the adjusting wheel is adapted to maintain the movable member in a fixed state under the action of the belt. When the belt breaks, the adjusting wheel is adapted to break away from the action of the belt and drive the movable member to rotate, so that the swing arm swings;

[0007] A detection component, which is arranged corresponding to the swing arm and is used to detect the swing of the swing arm, and the detection component makes an alarm response based on the swing of the swing arm.

[0008] Optionally, the adjusting wheel and the swing arm are respectively located on both sides of the rotating shaft.

[0009] Optionally, the movable member includes a rotating rod, the adjusting wheel and the swing arm are respectively located at both ends of the rotating rod, the rotating shaft is arranged between the adjusting wheel and the swing arm, and the sum of the weights of the part of the rotating rod near the adjusting wheel and the adjusting wheel is greater than the sum of the weights of the part of the rotating rod near the swing arm and the swing arm, so that the adjusting wheel drops when the acting force of the belt is removed, and the swing arm rises.

[0010] Optionally, it further includes a limiting block, the limiting block is arranged on the fixed frame, when the belt does not break, the swing arm contacts the limiting block to maintain the movable member in a fixed state, and when the belt breaks, the swing arm swings and disengages from the limiting block.

[0011] Optionally, the detection assembly includes a displacement sensor. The displacement sensor is arranged near the limiting block to detect the position of the swing arm. The displacement sensor responds to the movement of the swing arm disengaging from the limiting block and sends an alarm signal to the alarm device to make an alarm response.

[0012] This application also provides an OHT lifting device, including:

[0013] A fixed frame, provided with a fixed wheel and a hoisting wheel;

[0014] A driving mechanism, the output end of which is connected to the hoisting wheel;

[0015] A belt, one end of which is wound around the hoisting wheel, and the other end bypasses the fixed wheel and is connected to a lifting tooling to drive the lifting tooling to move up and down;

[0016] The belt breakage detection device as described above is arranged on the fixed frame, wherein the adjusting wheel contacts the belt located between the fixed wheel and the hoisting wheel.

[0017] Optionally, the fixed wheel includes a first fixed wheel, the belt extends from the hoisting wheel, bypasses the upper surface of the first fixed wheel and extends downward to connect the lifting tooling, and the adjusting wheel contacts the belt located between the first fixed wheel and the hoisting wheel.

[0018] Optionally, the fixed wheel includes a second fixed wheel, a third fixed wheel and a fourth fixed wheel. The belt extends from the hoisting wheel, bypasses the upper surface of the second fixed wheel and then extends to the third fixed wheel, and successively bypasses the lower surface of the third fixed wheel and the upper surface of the fourth fixed wheel and then extends downward to connect the lifting tooling. The adjusting wheel contacts the belt located between the second fixed wheel and the third fixed wheel.

[0019] Optionally, the OHT lifting device includes at least four groups of belts, each group of belts having a corresponding hoisting wheel and a fixed wheel, and each group of belts bypasses its corresponding fixed wheel and is respectively connected to four suspension points for lifting the tooling.

[0020] Optionally, the driving mechanism includes a servo motor, a speed reducer and a reel. The hoisting wheels corresponding to the four belts are arranged on the reel, and the servo motor drives the four hoisting wheels to rotate synchronously through the speed reducer and the reel.

[0021] The belt breakage detection device provided by the present application sets the adjusting wheel on a movable part that can rotate, and sets a swing arm on the movable part. The belt contacts the lower surface of the adjusting wheel during the lifting operation. When the belt does not break, the adjusting wheel is under the upward acting force of the belt to maintain the movable part and the swing arm in a fixed state. When the belt breaks, the adjusting wheel falls off the acting force of the belt, thereby causing the movable part and the swing arm to swing. The detection component makes an alarm response by detecting the swing of the swing arm, and thus quickly and effectively detects that the belt has broken. This device acts directly on the belt, can quickly respond according to the breakage situation of the belt, quickly and effectively detect the breakage situation of the belt, and provides safety guarantee for the belt lifting operation.

[0022] The OHT lifting device provided by the present application, since it is equipped with the above-mentioned belt breakage detection device, also has all the above-mentioned advantages. Brief Description of the Drawings

[0023] In order to more clearly illustrate the implementation manners of the present application, the relevant drawings will be briefly introduced below. It can be understood that the drawings in the following description are only used to illustrate some implementation manners of the present application, and those of ordinary skill in the art can also obtain many other technical features and connection relationships not mentioned in this article according to these drawings.

[0024] Figure 1 It is a schematic diagram of the working state of the belt breakage detection device of the present application;

[0025] Figure 2 It is a schematic diagram of the structure of the belt breakage detection device of the present application;

[0026] Figure 3 It is a schematic diagram of the force state analysis of the adjusting wheel of the present application;

[0027] Figure 4 It is a schematic diagram of the state of the belt breakage detection device of the present application when the belt is not broken;

[0028] Figure 5 It is a schematic diagram of the state of the belt breakage detection device of the present application when the belt is broken;

[0029] Figure 6Structural schematic diagram of the detection component of the present application;

[0030] Figure 7 Structural schematic diagram of the OHT lifting device of the present application;

[0031] Figure 8 Arrangement schematic diagram of the first belt and the third belt of the OHT lifting device of the present application;

[0032] Figure 9 Top view schematic diagram of the OHT lifting device of the present application;

[0033] Figure 10 Arrangement schematic diagram of the third belt of the OHT lifting device of the present application;

[0034] Figure 11 Structural schematic diagram of the driving mechanism of the OHT lifting device of the present application.

[0035] Explanation of reference numerals:

[0036] 10, fixed frame;

[0037] 20, movable part; 21, adjusting wheel; 22, swing arm; 23, rotating shaft; 24, limit block; 25, mounting support; 26, displacement sensor; 27, sensor bracket;

[0038] 30, belt; 301, first belt; 302, second belt; 303, third belt; 304, fourth belt;

[0039] 40, fixed wheel; 401, first fixed wheel; 402, second fixed wheel; 403, third fixed wheel; 404, fourth fixed wheel;

[0040] 50, hoisting wheel;

[0041] 60, driving mechanism; 601, servo motor; 602, reducer; 603, reel;

[0042] 70, lifting tooling. Detailed implementation manners

[0043] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0044] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the embodiments of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0045] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0046] Next, the technical solutions in the embodiments of the present application will be described in detail with reference to the drawings in the embodiments of the present application.

[0047] Embodiment 1

[0048] As Figure 1 and Figure 2 shown, this embodiment provides a belt breakage detection device. The detection device has a movable member 20, and the movable member 20 is installed on a fixed frame 10 through a rotating shaft 23 and can rotate relative to the fixed frame 10. An adjusting wheel 21 is provided at one end of the movable member 20, and the adjusting wheel 21 is used to contact the belt 30. A swing arm 22 is provided at the other end of the movable member 20. The swing arm 22 can be fixedly connected to the movable member 20 or be a part of the movable member 20 and can swing following the rotation of the movable member 20.

[0049] The detection device also has a detection component. The detection component is arranged on one side of the movable member 20 so that the detection component is arranged corresponding to the swing arm 22. The detection component is used to detect the swing situation of the swing arm 22, and when the detection component detects the swing of the swing arm 22, it connects a corresponding alarm device to make an alarm response.

[0050] In this embodiment, the belt 30 in the lifting work is wound around from the lower surface of the adjusting wheel 21, that is, the lower surface of the adjusting wheel 21 contacts the belt 30. Here, the belt 30 is in an inclined state, and the belt 30 is stressed during the lifting process and thus generates a force on the adjusting wheel 21.

[0051] In this embodiment, the adjusting wheel 21 is set to be in a stationary state when subjected to the force of the belt 30, and the adjusting wheel 21 will fall due to its own gravity when not subjected to the force of the belt 30. In this way, the adjusting wheel 21 and the movable member 20 bear a certain force of the belt 30. When the adjusting wheel 21 is in contact with the belt 30 and in a stationary state, it indicates that the belt 30 is in a taut state, and then it can be judged that the belt 30 is not broken. When the adjusting wheel 21 falls and causes the movable member 20 to rotate and the swing arm 22 to swing, it indicates that the belt 30 is not under force, and it can be judged that the belt 30 has broken.

[0052] The specific principle is as Figure 3 shown. The lower surface of the adjusting wheel 21 is in contact with the inclined belt 30 during work, and the belt 30 bypasses the lower surface of the adjusting wheel 21 to form an arc with the opening facing upward. Since the belt 30 is subjected to a tensile force during lifting work, therefore, the belt 30 generates a force F on the adjusting wheel 21. The force F can be decomposed into a vertical force F1 and a horizontal force F2. Since the adjusting wheel 21 is connected to the movable member 20 through a fixed rotating shaft, and the movable member 20 is connected to the fixed frame 10 through a rotating shaft 23, the movable member 20 can only rotate around the rotating shaft 23 and cannot move. Therefore, the movable member 20 and the rotating shaft 23 bear the horizontal force F2. At the same time, a limiting device is provided at the maximum rotation angle of the movable member 20 or the swing arm 22, so that the movable member 20 is fixed when rotating to the maximum set angle to bear the vertical force F1. In this way, the adjusting wheel 21 and the movable member 20 are in a stationary state under the action of the belt 30, that is, as Figure 4 shown.

[0053] When the belt 30 breaks, the belt 30 loses its own tensile force. Therefore, the force F exerted by the belt 30 on the adjusting wheel 21 disappears, and the adjusting wheel 21 falls under its own gravity, driving the movable member 20 and the swing arm 22 to rotate, as Figure 5 shown. Therefore, as long as it is detected whether the swing arm 22 swings, it can be known whether the belt 30 has broken.

[0054] In one embodiment, the adjusting wheel 21 and the swing arm 22 can be located on both sides of the rotating shaft 23 respectively. In this way, the adjusting wheel 21 and the swing arm 22 have opposite movement directions when moving, and the movement of the swing arm 22 is used as a mapping of the movement of the adjusting wheel 21. By observing the movement of the swing arm 22, it can be known that the adjusting wheel 21 moves, which is easier to detect and observe and is convenient for the spatial layout of related equipment.

[0055] As Figure 2As shown, in one embodiment, the movable member 20 may be a straight rod, such as a rotating rod. The rotating rod and the rotating shaft 23 cooperate to form a lever. The rotating shaft 23 is installed on the fixed frame 10 through the mounting bracket 25. The adjusting wheel 21 and the swing arm 22 are respectively located at both ends of the rotating rod. When the adjusting wheel 21 drops, the swing arm 22 rises to facilitate the detection of the movement of the swing arm 22.

[0056] As Figure 6 shown, a limiting block 24 is provided on the fixed frame 10. The limiting block 24 extends below the swing arm 22. The belt 30 acts on the adjusting wheel 21 to apply an upward thrust to the adjusting wheel 21, causing the rotating rod to rotate. The swing arm 22 abuts against the limiting block 24 to keep the entire adjusting wheel 21 and the rotating rod in a prohibited state. When the belt 30 breaks, the adjusting wheel 21 drops and the swing arm 22 rises. At this time, the swing arm 22 disengages from the limiting block 24.

[0057] Of course, the movable member 20 is not limited to being a rotating rod. It can also be a member of other shapes, as long as it is ensured that the swing arm 22 and the adjusting wheel 21 are relatively fixed and the movement of the adjusting wheel 21 can be reflected by the movement of the swing arm 22. Therefore, the structural shape of the movable member 20 is not uniquely defined in this embodiment.

[0058] It is worth mentioning that the total weight of the part of the rotating rod near the adjusting wheel 21 and the adjusting wheel 21 is greater than the total weight of the part of the rotating rod near the swing arm 22 and the swing arm 22. That is to say, as Figure 2 shown, the gravity on the left side of the rotating shaft 23 in the figure is less than the gravity on the right side of the rotating shaft 23, so that the adjusting wheel 21 drops under its own gravity when it is disengaged from the acting force of the belt 30, while the swing arm 22 part rises.

[0059] In one embodiment, as Figure 6 shown, the detection component of this embodiment includes a displacement sensor 26. The displacement sensor 26 is installed near the limiting block 24 through the sensor bracket 27. The displacement sensor 26 is connected to the control system and the alarm device through a circuit. When the displacement sensor 26 detects the swing of the swing arm 22 or the swing arm 22 leaves the pre-fixed position, the displacement sensor 26 can respond to this swing and send an alarm signal to the alarm device. Once the alarm device obtains the alarm signal, it will immediately give an alarm, thus reminding the staff that the belt has broken.

[0060] Specifically, the displacement sensor 26 can be a swing arm sensor. When the swing arm 22 abuts against the limit block 24, the swing arm 22 just presses on the swing arm sensor. At this time, the swing arm sensor is closed, indicating that the belt 30 is used normally and has not broken. If the belt 30 breaks, the belt will naturally relax without tension, and the adjustment wheel 21 will naturally fall under gravity, then the swing arm 22 will rotate upward, and the swing arm 22 will be separated from the pressure of the swing arm sensor, and the swing arm sensor will be disconnected, indicating that the belt is broken at this time.

[0061] It can be seen from this that whether the belt 30 is broken can be determined by the position of the swing arm 22. The function of the swing arm sensor here is only to detect the position of the swing arm 22. Therefore, the swing arm sensor is not unique and can also be replaced with a proximity switch, a slot-type photoelectric or a through-beam sensor. As long as the position of the swing arm 22 can be checked, this embodiment does not make a unique limitation.

[0062] The belt breakage detection device provided in this embodiment determines whether the belt is broken by detecting the movement of the swing arm at the end of the movable rod. When the belt breaks, the adjusting wheel 21 can fall down quickly to drive the swing arm to react, and then make an alarm response, so as to quickly and effectively detect the belt breakage and provide safety protection for the belt lifting operation.

[0063] The belt breakage detection device acts directly on the belt and can correspond to each belt one-to-one. It can quickly and effectively detect belt breakage without affecting the operation of the belt, thereby ensuring the consistency of the operation of each belt.

[0064] Example 2

[0065] like Figure 7 As shown, this embodiment provides an OHT lifting device for lifting an OHT trolley in the semiconductor industry.

[0066] The OHT lifting device includes a fixed frame 10 located at the top, on which are disposed a plurality of fixed wheels 40 and a plurality of winch wheels 50 ; a driving mechanism 60 is also mounted on the fixed frame 10 , and an output end of the driving mechanism 60 is connected to the winch wheel 50 to drive the winch wheel 50 to rotate.

[0067] The OHT lifting device has a plurality of belts 30, one end of which is wound around a winch wheel 50, and the other end of which is extended downward around a fixed wheel 40 to connect to a lifting tool 70. A driving mechanism 60 drives the winch wheel 50 to rotate to retract and release the belts 30, thereby driving the lifting tool 70 to rise and fall.

[0068] The OHT lifting device of this embodiment is provided with a belt breakage detection device as mentioned in the above embodiment, and the belt breakage detection device is arranged in a one-to-one correspondence with the belts 30 and is used to individually detect the breakage of each belt 30.

[0069] The belt breakage detection device is installed on the fixed frame 10. Among them, the adjusting wheel 21 contacts the belt located between the fixed wheel 40 and the hoisting wheel 50. Regarding the specific position of the belt breakage detection device, reference can be made to Figure 1 As shown, the functional principle of the belt breakage detection device is as described in the above embodiment, and will not be elaborated here.

[0070] As Figure 7 As shown, in this embodiment of the OHT lifting device, there are at least four belts 30. This embodiment will be further described by taking four belts as an example.

[0071] The four belts include a first belt 301, a second belt 302, a third belt 303, and a fourth belt 304. Each of these four belts has a corresponding fixed wheel 40 and hoisting wheel 50. The ends of the four belts are connected to four lifting points of the lifting tooling 70 to drive the lifting tooling 70 to lift and lower smoothly. Each of the four belts is correspondingly installed with the above-mentioned belt breakage detection device, and each belt breakage detection device detects the breakage situation of its corresponding belt.

[0072] In this embodiment, the arrangement of the four belts can be the same or different. Based on the space layout of the top fixed frame 10, at least two arrangement methods can be provided for the four belts.

[0073] As Figure 8 And Figure 9 As shown, two belts are arranged on one side of the fixed frame 10, and another two belts are arranged on the other side of the fixed frame 10. The running and winding methods of the two belts located on the same side of the fixed frame 10 are different.

[0074] The first running and winding method is as Figure 8 shown (reference can be made to Figure 1 ), the first belt 301 cooperates with a fixed wheel 40, and this fixed wheel 40 is the first fixed wheel 401. The first belt 301 extends from the hoisting wheel 50, bypasses the upper surface of the first fixed wheel 401 and extends downward to connect the lifting tooling 70. The adjusting wheel 21 contacts the belt located between the first fixed wheel 401 and the hoisting wheel 50. This running and winding method has a shorter stroke and can be used in the case where the horizontal distance between the lifting point of the lifting tooling 70 and the hoisting wheel 50 is relatively close.

[0075] The second running and winding method is as Figure 10As shown, the third belt 303 cooperates with three fixed wheels 40, including the second fixed wheel 402, the third fixed wheel 403, and the fourth fixed wheel 404, and the second fixed wheel 402, the third fixed wheel 403, and the fourth fixed wheel 404 are arranged in the same direction. The third belt 303 extends from its corresponding hoisting wheel 50, bypasses the upper surface of the second fixed wheel 402, then extends towards the third fixed wheel 403, and successively bypasses the lower surface of the third fixed wheel 403 and the upper surface of the fourth fixed wheel 404 before extending downward to connect to another suspension point of the lifting tooling 70. At this time, the adjusting wheel 21 corresponding to the third belt 303 contacts the belt between the second fixed wheel 402 and the third fixed wheel 403. The detection principle of the belt breakage detection device in this case is the same as the above, and will not be elaborated here. This running and winding method has a longer stroke and can be used in the case where the horizontal distance between the suspension point of the lifting tooling 70 and the hoisting wheel 50 is relatively far.

[0076] The running and winding method of the second belt 302 and the first belt 301 in this embodiment is the same, and the running and winding method of the fourth belt 304 and the third belt 303 is the same, which will not be elaborated here.

[0077] As Figure 11 As shown, for the OHT lifting equipment provided in this embodiment, the driving mechanism 60 includes a servo motor 601, a speed reducer 602, and a reel 603. The hoisting wheels 50 corresponding to the four belts 30 are all arranged on the same reel 603. The servo motor 601 drives the four hoisting wheels 50 to rotate synchronously through the speed reducer 602 and the reel 603. This can not only ensure the operation consistency of the four belts 30, but also save the space of the top fixed frame 10, simplify the equipment, and make the spatial layout of the equipment more reasonable.

[0078] The lifting tooling 70 in this embodiment can be an OHT cart, which belongs to the OHT crane handling system. The OHT crane handling system is an automatic wafer conveying system in the chip manufacturing process, which can efficiently and automatically transport wafers and is an important equipment for chip manufacturing. The OHT cart needs regular maintenance, fault repair, etc. Then the crane needs to be lowered to the maintenance station for repair. After the repair is completed, the cart needs to be sent to the sky rail for operation. The device for lowering the cart to the ground and sending it to the crane rail is the OHT cart lifting device.

[0079] For the OHT lifting equipment provided in this embodiment, a corresponding belt breakage detection device is installed for each belt, which can detect the breakage situation of each belt in real time. Once it is found that the belt is broken, an alarm will be given immediately to prompt the staff to carry out maintenance, ensuring the safety of the lifting operation.

[0080] In the embodiments of the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0081] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present utility model. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A belt breakage detection device, characterized in that, Comprising: A movable member (20) is mounted on a fixed frame (10) through a rotating shaft (23). The movable member (20) is provided with an adjusting wheel (21) and a swing arm (22). Wherein, the lower surface of the adjusting wheel (21) is adapted to contact the belt (30). When the belt (30) is not broken, the adjusting wheel (21) is adapted to maintain the movable member (20) in a fixed state under the action of the belt (30). When the belt (30) is broken, the adjusting wheel (21) is adapted to break away from the action of the belt (30) and drive the movable member (20) to rotate, so that the swing arm (22) swings. A detection assembly is correspondingly arranged with the swing arm (22) for detecting the swing of the swing arm (22), and the detection assembly makes an alarm response based on the swing of the swing arm (22).

2. The belt breakage detection device according to claim 1, characterized in that The adjusting wheel (21) and the swing arm (22) are respectively located on both sides of the rotating shaft (23).

3. The belt breakage detection device according to claim 2, characterized in that, The movable member (20) includes a rotating rod. The adjusting wheel (21) and the swing arm (22) are respectively located at both ends of the rotating rod. The rotating shaft (23) is arranged between the adjusting wheel (21) and the swing arm (22). The total weight of the rotating rod near the adjusting wheel (21) and the adjusting wheel (21) is greater than the total weight of the rotating rod near the swing arm (22) and the swing arm (22), so that the adjusting wheel (21) falls when it breaks away from the action of the belt (30), and the swing arm (22) rises.

4. The belt breakage detection device according to claim 3, wherein It further includes a limit block (24). The limit block (24) is arranged on the fixed frame (10). When the belt (30) is not broken, the swing arm (22) contacts the limit block (24) to maintain the movable member (20) in a fixed state. When the belt (30) is broken, the swing arm (22) swings and breaks away from the limit block (24).

5. The belt breakage detection device according to claim 4, wherein The detection assembly includes a displacement sensor (26). The displacement sensor (26) is arranged near the limit block (24) to detect the position of the swing arm (22). The displacement sensor (26) responds to the movement of the swing arm (22) breaking away from the limit block (24) and sends an alarm signal to the alarm device to make an alarm response.

6. An OHT lifting device, characterized in that, Comprising: A fixed frame (10) is provided with a fixed wheel (40) and a hoisting wheel (50). A driving mechanism (60) has an output end connected to the hoisting wheel (50). A belt (30) has one end wound around the hoisting wheel (50) and the other end bypassing the fixed wheel (40) to be connected to a lifting tooling (70) to drive the lifting tooling (70) to move up and down. The belt breakage detection device according to any one of claims 1-5 is arranged on the fixed frame (10), wherein the adjusting wheel (21) contacts the belt located between the fixed wheel (40) and the hoisting wheel (50).

7. The OHT lifting device according to claim 6, wherein The fixed wheel (40) includes a first fixed wheel (401). The belt (30) extends from the hoisting wheel (50), bypasses the upper surface of the first fixed wheel (401), and extends downward to connect to the lifting tooling (70). The adjusting wheel (21) contacts the belt located between the first fixed wheel (401) and the hoisting wheel (50).

8. The OHT lifting device according to claim 6, characterized in that, The fixed wheel (40) includes a second fixed wheel (402), a third fixed wheel (403), and a fourth fixed wheel (404). The belt (30) extends from the hoisting wheel (50), bypasses the upper surface of the second fixed wheel (402), then extends towards the third fixed wheel (403), sequentially bypasses the lower surface of the third fixed wheel (403) and the upper surface of the fourth fixed wheel (404), and then extends downward to connect to the lifting tooling (70). The adjusting wheel (21) contacts the belt located between the second fixed wheel (402) and the third fixed wheel (403).

9. The OHT lifting device according to claim 6, characterized in that, It includes at least four groups of belts (30). Each group of belts (30) has a corresponding hoisting wheel (50) and fixed wheel (40). Each group of belts (30) bypasses its corresponding fixed wheel (40) and respectively connects the four suspension points of the tooling lifting (70).

10. The OHT lifting device according to claim 9, characterized in that, The driving mechanism (60) includes a servo motor (601), a speed reducer (602), and a reel (603). The hoisting wheels (50) corresponding to the four belts (30) are arranged on the reel (603). The servo motor (601) drives the four hoisting wheels (50) to rotate synchronously through the speed reducer (602) and the reel (603).

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