Limiting device for preventing top collision of lifting hook

Abstract

The utility model discloses an anti-collision limiting device for a lifting hook, which is provided with a transmission rod, a turntable, an arc-shaped groove, a switch main body and a trigger column, and when an object taking device moves upwards to contact with the transmission rod, the trigger column is switched from an extension state to a contraction state, namely the transmission rod is driven to swing upwards, so that the arc-shaped groove moves; compared with the prior art in which a heavy punch, a rope and a limit switch are adopted, the transmission rod and the turntable are not easy to fall off after being installed, have no potential safety hazard, are not easy to fall off after being installed, are not easy to fall off after being installed, and are not easy to damage due to the fact that the rope is not adopted. Furthermore, the transmission rod in the initial state is inclined, the occupied space is small, the size of the hoist C is greatly reduced, the effective working space of a plant is increased, and the layout planning of the plant is more flexible.

Description

TECHNICAL FIELD

[0001] The utility model relates to a top -climbing -prevention limiting technical field especially relates to a hook top -climbing -prevention limiting device. BACKGROUND

[0002] The commonly used electric hoist will have a matched hook top -climbing -prevention limiting structure, the hoist includes the object taking device mainly with the hook, after the object taking device is lifted, the object taking device will contact with the corresponding hook top -climbing -prevention limiting structure, realizes the purpose of preventing the object taking device to continue ascending, the common hook top -climbing -prevention limiting structure is composed of a limit switch and a weight, the weight is fixed on the trigger column of the limit switch through the rope, makes the trigger column always be pulled out downward, the normally closed contact in the limit switch is always connected, when the object taking device lifts the weight, the trigger column retracts and loses the pull-down force, makes the normally closed contact of the limit switch separate, thereby cutting off the ascending power supply of the object taking device, makes the object taking device stop ascending,

[0003] The top -climbing -prevention limiting of the combination of the weight and the limit switch needs to use the rope, not only easy to be confused with other ropes, causes subsequent unable to measure, and the structural strength of the rope is limited, the risk of the weight falling after long -term use easily appears, and the safety accident appears. SUMMARY

[0004] In view of above-mentioned defects or insufficient in the prior art, it is expected to provide a hook top -climbing -prevention limiting device.

[0005] The utility model provides a hook top -climbing -prevention limiting device, including:

[0006] The normal direction of the base plate is the first direction;

[0007] The transmission assembly includes a turntable rotatable on the top of the base plate, the extension direction of the rotation axis of the turntable is the first direction, a transmission rod is arranged on one side of the turntable, an arc-shaped groove is arranged on the bottom surface of the turntable, and a limiting column is arranged on the base plate to limit the downward swing of the transmission rod;

[0008] The switch assembly includes a switch main body arranged on the bottom of the base plate, a trigger column is arranged at the top end of the switch main body, the trigger column has an extended state and a retracted state, when in the extended state, the top part of the trigger column is inside the arc-shaped groove, the extension direction of the transmission rod and the second direction have a first included angle, when in the retracted state, the top part of the trigger column is separated from the inside of the arc-shaped groove, the extension direction of the transmission rod is parallel to the second direction, and the first direction and the second direction are parallel to each other.

[0009] According to the technical scheme provided in the embodiment of the application, the top end of the trigger column is provided with a self-rotating rolling disc, the axis extension direction of the rolling disc is the first direction, and the outer surface of the rolling disc is in contact with the side surface of the rotating disc.

[0010] According to the technical scheme provided in the embodiment of the application, the top end of the trigger column is provided with an avoiding groove, the avoiding groove is provided with a mounting seat at both ends in the first direction, the rolling disc is coaxially provided with a connecting shaft at both ends in the first direction, and the two connecting shafts are rotatably mounted in the two mounting seats respectively.

[0011] According to the technical scheme provided in the embodiment of the application, the top of the base plate is provided with a center bolt through threaded connection, the center bolt is provided with a rotating sleeve, and the rotating disc is sleeved on the outside of the rotating sleeve.

[0012] According to the technical scheme provided in the embodiment of the application, the rotating disc is provided with a limiting ring away from the side of the base plate, the limiting ring is sleeved on the center bolt, the outer diameter of the limiting ring is greater than the outer diameter of the rotating sleeve, and the inner diameter of the limiting ring is matched with the large diameter of the thread of the center bolt.

[0013] According to the technical scheme provided in the embodiment of the application, the base plate is further provided with a mounting assembly, and the base plate is mounted on the electric hoist through the mounting assembly.

[0014] According to the technical scheme provided in the embodiment of the application, the mounting assembly comprises a first connecting plate which is detachably connected with the base plate, one side of the first connecting plate is provided with a second connecting plate, the second connecting plate comprises at least two groups of slot hole groups arranged in the first direction, each slot hole group comprises two mounting slots arranged in the vertical direction, a U-shaped bolt is mounted between the two mounting slots of the same slot hole group, and the two ends of the U-shaped bolt are both provided with a locking nut through threaded connection.

[0015] According to the technical scheme provided in the embodiment of the application, the mounting assembly further comprises a plurality of through holes provided on the first connecting plate, the base plate is provided with a plurality of screw holes corresponding to the through holes, the first connecting plate is provided with a plurality of connecting bolts penetrating through the through holes, and one end of the connecting bolt is threadedly connected with the screw hole.

[0016] According to the technical scheme provided in the embodiment of the application, the first connecting plate is provided with a plurality of avoiding holes, and the center bolt corresponds to one avoiding hole.

[0017] Compared with the prior art, the application has the following beneficial effects:

[0018] The utility model discloses set up transmission rod, carousel, arc -shaped groove, switch main part and trigger column, when taking thing device moves upward and contacts transmission rod, will with trigger column from the extension state switch to the contraction state, that is drive transmission rod swing upward, make arc -shaped groove position move, further make trigger column top end separate arc -shaped groove, trigger column retract, make the normally closed contactor in the switch main part separate, thereby cut off the ascending power supply of taking thing device, make taking thing device stop ascending, compared with prior art adopts weight, rope and limit switch, transmission rod and carousel install and do not fall easily, do not have the security risk, and do not adopt the rope, do not easily with other rope appear confusion, further, the transmission rod under initial state is inclined, and the space is less, greatly reduce gourd C size, increase the effective work space of factory building, and the layout planning of factory building is more flexible, so that the factory building can be designed smaller, and the function is more complete.

[0019] Further, the trigger column is provided with a mounting seat, a connecting shaft and a rolling disc. When the carousel rotates, the rolling disc rolls along the side surface of the carousel, including rolling along the inner wall of the arc-shaped groove. The rolling friction replaces the sliding friction of the direct contact of the trigger column, which not only reduces the friction resistance and makes the carousel rotate more smoothly, but also avoids the wear caused by the direct contact of the trigger column with the carousel.

[0020] Further, the mounting assembly is provided. The first connecting plate is installed on the base plate through the through hole, the screw hole and the connecting bolt. The gourd shaft part is clamped by the U-shaped bolt and then passes through the corresponding installation slot. After the locking nut is connected, it is fixed, the installation of the second connecting plate is completed, and then the installation of the base plate, the transmission assembly and the switch assembly is realized. The connection positions are all connected by threads, and the assembly or disassembly and replacement are facilitated.

[0021] It should be understood that the content described in the utility model content part is not intended to limit the key or important features of the embodiments of the utility model, nor is it intended to limit the scope of the utility model. Other features of the utility model will become apparent through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0022] Other features, objects and advantages of the utility model will become more apparent through reading the detailed description of the non-limiting embodiments made by referring to the following drawings:

[0023] Figure 1 A structure schematic view of a hook anti-collision limiting device provided by the embodiment of the application;

[0024] Figure 2 A sectional structure schematic view of the top of a hook anti-collision limiting device provided by the embodiment of the application;

[0025] Figure 3 A sectional structure schematic view of the bottom of a hook anti-collision limiting device provided by the embodiment of the application;

[0026] Figure 4 A structure schematic view of a first connecting plate of a hook anti-collision top limiting device provided by an embodiment of the application.

[0027] Reference numerals in the drawings:

[0028] 1, base plate;

[0029] 2, mounting assembly; 21, first connecting plate; 22, second connecting plate; 23, mounting groove; 24, U-shaped bolt; 25, locking nut; 26, through hole; 27, threaded hole; 28, connecting bolt; 39, avoiding hole;

[0030] 3, transmission assembly; 31, rotating disc; 32, arc-shaped groove; 33, transmission rod; 34, center bolt; 35, rotating sleeve; 36, limiting ring; 37, compensation plate; 38, limiting column;

[0031] 4, switch assembly; 41, switch main body; 42, triggering column; 43, avoiding groove; 44, mounting seat; 45, connecting shaft; 46, rolling disc. DETAILED DESCRIPTION

[0032] The utility model will be further explained in detail below by combining with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and are not limited to the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for convenience of description.

[0033] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict. The utility model will be described in detail below by combining with the drawings and embodiments.

[0034] Please refer to Figures 1-4 The embodiment of the utility model provides a hook anti-collision top limiting device, which comprises:

[0035] The normal direction of the base plate 1 is the first direction;

[0036] The transmission assembly 3 comprises a rotating disc 31 rotatable on the top of the base plate 1, the extending direction of the rotating shaft of the rotating disc 31 is the first direction, the rotating disc 31 is provided with a transmission rod 33 on one side, the bottom surface of the rotating disc 31 is provided with an arc-shaped groove 32, and the base plate 1 is provided with a limiting column 38 limiting the downward swing of the transmission rod 33;

[0037] The switch assembly 4 comprises a switch body 41 arranged at the bottom of the base plate 1, and the switch body 41 is provided with a trigger column 42 at the top end. The trigger column 42 has an extended state and a retracted state. When in the extended state, the top of the trigger column 42 is inside the arc-shaped groove 32, and the extension direction of the transmission rod 33 and the second direction have a first included angle. When in the retracted state, the top of the trigger column 42 is out of the arc-shaped groove 32, and the extension direction of the transmission rod 33 is parallel to the second direction. The first direction and the second direction are parallel to each other, wherein the first direction is the front-back direction in Figure 1 , and the second direction is the left-right direction in Figure 1 ;

[0038] When the taking device moves upward to contact the transmission rod 33, the trigger column 42 will be switched from the extended state to the retracted state, that is, the transmission rod 33 and the trigger column 42 are switched from the Figure 1 state to the Figure 2 state, that is, the transmission rod 33 is swung upward, the position of the arc-shaped groove 32 is moved, and the top of the trigger column 42 is out of the arc-shaped groove 32. The trigger column 42 is retracted, the normally closed contact in the switch body 41 is separated, the power supply of the taking device is cut off, and the taking device stops rising. Compared with the existing technology using a weight, a rope and a limit switch, the transmission rod 33 and the rotating disc 31 are not easy to fall off after installation, and there is no safety hazard. Moreover, the rope is not used, and it is not easy to cause confusion with other ropes. Furthermore, the transmission rod 33 in the initial state is in an inclined state, occupies a smaller space, greatly reduces the size of the gourd C, increases the effective working space of the factory building, and makes the layout planning of the factory building more flexible. Therefore, the factory building can be designed to be smaller and more functional.

[0039] In some embodiments, the top end of the trigger column 42 is provided with a self-rotating rolling disc 46, and the axis of the rolling disc 46 extends in the first direction. The outer surface of the rolling disc 46 is in contact with the side surface of the rotating disc 31.

[0040] As shown in Figure 1 and Figure 3 , when the rotating disc 31 rotates, the rolling disc 46 will roll along the side surface of the rotating disc 31, including rolling along the inner wall of the arc-shaped groove 32. The rolling friction replaces the sliding friction of the direct contact of the trigger column 42, not only reduces the friction resistance, but also makes the rotation of the rotating disc 31 more smooth, and avoids the wear caused by the direct contact between the trigger column 42 and the rotating disc 31.

[0041] In some embodiments, the top end of the trigger column 42 is provided with an avoiding groove 43, and the avoiding groove 43 is provided with a mounting seat 44 at both ends in the first direction. The rolling disc 46 is coaxially provided with a connecting shaft 45 at both ends in the first direction, and the two connecting shafts 45 are rotatably installed in the two mounting seats 44, respectively.

[0042] As shown in Figure 1 and Figure 3As shown, the rolling disc 46 is provided with a connecting shaft 45 at both ends, and is rotatably connected with the mounting seat 44, to ensure stable rotation of the rolling disc 46, and is provided with an avoiding groove 43 to avoid interference between the rolling disc 46 and the trigger column 42.

[0043] In some embodiments, the top of the base plate 1 is threadedly connected with a center bolt 34, the center bolt 34 is sleeved with a rotating sleeve 35, and the rotating disc 31 is sleeved outside the rotating sleeve 35;

[0044] As shown in Figure 1 and Figure 2 , the rotating disc 31 is sleeved outside the center bolt 34 through the rotating sleeve 35, to realize the purpose of rotating the rotating disc 31 around the rotating sleeve 35, and further, the rotating sleeve 35 is of a stepped type, and the compensating plate 37 is arranged between the rotating disc 31 and the base plate 1, to limit the axial movement of the rotating disc 31 to the rear, and to avoid collision between the rotating disc 31 and the base plate 1.

[0045] In some embodiments, the rotating disc 31 is provided with a limiting ring 36 away from the base plate 1, the limiting ring 36 is sleeved on the center bolt 34, the outer diameter of the limiting ring 36 is greater than the outer diameter of the rotating sleeve 35, and the inner diameter of the limiting ring 36 is matched with the large diameter of the thread of the center bolt 34;

[0046] As shown in Figure 1 and Figure 2 , the limiting ring 36 presses the rotating sleeve 35 on one hand to ensure the stability of the rotating sleeve 35, and on the other hand limits the axial movement of the rotating disc 31 to the front to avoid disengagement of the rotating disc 31.

[0047] In some embodiments, the base plate 1 is further provided with a mounting assembly 2, and the base plate 1 is mounted to the electric hoist through the mounting assembly 2, to ensure that the corresponding taking device of the electric hoist can touch the transmission rod 33.

[0048] In some embodiments, the mounting assembly 2 includes a first connecting plate 21 which is detachably connected with the base plate 1, one side of the first connecting plate 21 is provided with a second connecting plate 22, the second connecting plate 22 includes at least two groups of slot holes arranged in a first direction, each group of slot holes includes two mounting slots 23 arranged in a vertical direction, a U-shaped bolt 24 is arranged between the two mounting slots 23 of the same group of slot holes, and lock nuts 25 are threadedly connected at both ends of the U-shaped bolt 24;

[0049] As shown in Figure 1 and Figure 4 , the combination of the U-shaped bolt 24, the second connecting plate 22 and the lock nut 25 can clamp the electric hoist, to realize the mounting of the base plate 1, and because at least two groups of slot holes are provided, the stability after clamping is improved, and the deflection of the entire device is avoided.

[0050] In some embodiments, the mounting assembly 2 further comprises a plurality of through holes 26 on the first connecting plate 21, the base plate 1 is provided with a plurality of screw holes 27 corresponding to the through holes 26, and the first connecting plate 21 is provided with a plurality of connecting bolts 28 penetrating through the through holes 26, one end of the connecting bolt 28 being threadedly connected with the screw hole 27;

[0051] As shown in Figure 1 and Figure 4 , the detachable mounting between the first connecting plate 21 and the base plate 1 is achieved, which facilitates the separation of the first connecting plate 21 and the base plate 1 and the use of the mounting assembly 2, that is, the first connecting plate 21 and the second connecting plate 22 can be mounted on the electric hoist first, and then the base plate 1 is connected, or the first connecting plate 21 and the second connecting plate 22 can be connected with the base plate 1 first, and then the limiting device is mounted on the electric hoist through the mounting assembly 2, so that the disassembly and assembly are more convenient.

[0052] In some embodiments, the first connecting plate 21 is provided with a plurality of avoiding holes 39, and the center bolt 34 corresponds to one avoiding hole 39; as shown in Figure 2 and Figure 4 , the interference between the center bolt 34 and the first connecting plate 21 is avoided, and the stable connection between the first connecting plate 21 and the base plate 1 is ensured.

[0053] In the description of the present specification, the terms "connection", "mounting", "fixing" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] In the description of the present specification, the terms "one embodiment", "some embodiments" and the like mean 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 present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hook anti-collision limiting device, characterized in that, Include: Base plate (1), the normal direction of the base plate (1) is the first direction; Transmission assembly (3), including rotatable turntable (31) arranged on the top of the base plate (1), the rotation axis of the turntable (31) extends in the first direction, the transmission rod (33) is arranged on one side of the turntable (31), the bottom surface of the turntable (31) is provided with an arc-shaped groove (32), the base plate (1) is provided with a limiting column (38) for limiting the downward swing of the transmission rod (33); Switch assembly (4), including switch body (41) arranged on the bottom of the base plate (1), the top end of the switch body (41) is provided with trigger column (42), the trigger column (42) has an extended state and a retracted state, when in the extended state, the top of the trigger column (42) is inside the arc-shaped groove (32), the first angle between the extension direction of the transmission rod (33) and the second direction, when in the retracted state, the top of the trigger column (42) is separated from the inside of the arc-shaped groove (32), the extension direction of the transmission rod (33) is parallel to the second direction, the first direction and the second direction are parallel to each other.

2. The hook anti-collision limiting device according to claim 1, characterized in that, The top end of the trigger column (42) is provided with a rotatable rolling disc (46), the axis of the rolling disc (46) extends in the first direction, the outer surface of the rolling disc (46) is in contact with the side surface of the turntable (31).

3. The hook anti-collision limiting device according to claim 2, characterized in that, The top end of the trigger column (42) is provided with an avoidance groove (43), the avoidance groove (43) is provided with a mounting seat (44) at both ends in the first direction, the rolling disc (46) is coaxially provided with a connecting shaft (45) at both ends in the first direction, the two connecting shafts (45) are rotatably installed in the two mounting seats (44) respectively.

4. The hook anti-collision limiting device according to claim 1, characterized in that, The top of the base plate (1) is connected with a center bolt (34) through threads, the center bolt (34) is provided with a rotating sleeve (35), and the rotating sleeve (35) is sleeved on the rotating sleeve (35).

5. The hook anti-collision limiting device according to claim 4, characterized in that, The side of the turntable (31) away from the base plate (1) is provided with a limiting ring (36), the limiting ring (36) is sleeved on the center bolt (34), the outer diameter of the limiting ring (36) is greater than the outer diameter of the rotating sleeve (35), and the inner diameter of the limiting ring (36) is matched with the large diameter of the threads of the center bolt (34).

6. The hook anti-collision limiting device according to claim 5, characterized in that, The base plate (1) is further provided with a mounting assembly (2), and the base plate (1) is mounted on an electric hoist through the mounting assembly (2).

7. The hook anti-collision limiting device according to claim 6, characterized in that, The mounting assembly (2) includes a first connecting plate (21) detachably connected with the base plate (1), one side of the first connecting plate (21) is provided with a second connecting plate (22), the second connecting plate (22) includes at least two groups of slot holes arranged in the first direction, each slot hole group includes two mounting slots (23) arranged in the vertical direction, a U-shaped bolt (24) is arranged between the two mounting slots (23) of the same slot hole group, and the two ends of the U-shaped bolt (24) are connected with locking nuts (25) through threads.

8. The hook anti-collision limiting device according to claim 7, characterized in that, The mounting assembly (2) further comprises a plurality of through holes (26) provided on the first connecting plate (21), the base plate (1) is provided with a plurality of screw holes (27) corresponding to the through holes (26), and the first connecting plate (21) is provided with a plurality of connecting bolts (28) penetrating through the through holes (26), one end of the connecting bolt (28) being threadedly connected with the screw hole (27).

9. The hook anti-collision limiting device according to claim 7, characterized in that, The first connecting plate (21) is provided with a plurality of avoiding holes (39), and the central bolt (34) corresponds to one avoiding hole (39).

Images