Upper limiting device of hoist hook lifting heavy hammer

Abstract

The utility model discloses an upper limiting device of a hoist hook lifting heavy hammer, which comprises an insulating rod, a guide component and a heavy hammer limiting switch, and the insulating rod acts on the tail end of an ascending path of a hoist hook pulley block; the guide assembly is connected with one end of the insulating rod and is used for guiding the movement of the insulating rod; the heavy hammer limit switch is fixedly connected above the tail end of an ascending path of the hoist hook pulley block, a trigger output end of the heavy hammer limit switch is connected with a heavy hammer connected with the other end of the insulating rod through a traction rope, and the heavy hammer limit switch is used for triggering the hoist hook pulley block to stop running; compared with the prior art, the structure is relatively simple, installation and maintenance are relatively easy, force is transmitted through the insulating rod, the traction rope, the heavy hammer and the like, the impact force borne by the heavy hammer limiting switch is relatively small, and the hoist hook pulley block runs more safely.

Description

Technical Field

[0001] This utility model relates to the field of limiting structure technology, specifically to an upper limit device for lifting weights of a hoist hook. Background Technology

[0002] In the field of lifting equipment, hoists and hooks are a common lifting tool widely used in various industries such as manufacturing, construction, and logistics. The hoist hook pulley block, as its core working component, undertakes the crucial task of lifting and lowering heavy objects. However, in actual operation, to ensure the safety and reliability of lifting operations, it is essential to precisely control the lifting height of the hoist hook pulley block to prevent serious safety accidents such as equipment damage or falling objects caused by excessive lifting.

[0003] Currently, most existing hoist hook lifting limit devices use mechanical or electronic limit switches. Mechanical limit switches typically trigger the limit action by directly contacting the hoist hook pulley block. However, this method suffers from rapid wear, low accuracy, and susceptibility to external interference. Prolonged use may lead to inaccurate limit settings, increasing safety hazards. Electronic limit switches rely on sensors and circuit systems to detect the pulley block position. While offering higher accuracy, they are expensive and have stringent environmental requirements. Circuit malfunctions or electromagnetic interference can cause the limit function to fail.

[0004] In addition, existing limit devices are often complex in structure design, making them difficult to install and maintain. Furthermore, some devices may generate significant impact when the limit action is triggered, causing unnecessary damage to the hoist hook pulley block. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an upper limit device for lifting weight of hoist hook, so as to solve the problem that the existing limit devices are often complex in structural design, difficult to install and maintain, and some devices may generate a large impact force when triggering the limit action, causing unnecessary damage to the pulley block and hook.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a hoist hook lifting counterweight upper limit device, comprising:

[0007] An insulating rod, which acts at the end of the upward path of the hoist hook pulley block;

[0008] A guide assembly, which is connected to one end of an insulating rod and is used to guide its movement.

[0009] A counterweight limit switch is fixedly connected above the end of the rising path of the hoist hook pulley block, and its trigger output end is connected to a counterweight connected to the other end of the insulating rod via a traction rope. The counterweight limit switch is used to trigger the hoist hook pulley block to stop running.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] This hoist hook lifting counterweight upper limit device uses a guide assembly to hoist one end of the insulating rod, while the other end is hoisted using a counterweight limit switch, traction rope, and counterweight. During operation, when the hoist hook pulley block moves upward to the end of the rising path and contacts the insulating rod, it drives the insulating rod to move upward. The guide assembly guides the movement of the insulating rod, and the counterweight moves upward with the insulating rod. The trigger output of the counterweight limit switch experiences reduced tension, triggering the hoist hook pulley block to stop moving upward. This hoist hook pulley block has a relatively simple structure, is relatively easy to install and maintain, and transmits force through the insulating rod, traction rope, and counterweight, resulting in relatively small impact force on the counterweight limit switch and safer operation of the hoist hook pulley block. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0013] Figure 2 for Figure 1 A partial sectional view of section A in the middle;

[0014] Figure 3 This is a schematic diagram of another embodiment of the present invention;

[0015] Figure 4 for Figure 3 A schematic diagram showing the connection between the anti-jamming balance plate and the insulating rod.

[0016] The reference numerals in the accompanying drawings of the instruction manual include: 1. Hoist hook pulley block; 2. Insulating rod; 3. Guide assembly; 31. Guide seat; 32. Guide rod; 33. Limit head; 4. Counterweight limit switch; 5. Traction rope; 6. Counterweight; 7. Connecting head; 71. Connecting body; 72. First interface tube; 73. Second interface tube; 8. Detachable connecting structure; 81. Connecting notch; 82. Connecting rod; 83. Locking cap; 9. Anti-jamming balance plate. Detailed Implementation

[0017] The present invention will be further described in detail below through specific embodiments:

[0018] like Figure 1As shown in the figure, this utility model embodiment proposes an upper limit device for the lifting weight of a hoist hook, including an insulating rod 2, a guide assembly 3, and a weight limit switch 4. The insulating rod 2 acts at the end of the upward path of the hoist hook pulley block 1. The guide assembly 3 is connected to one end of the insulating rod 2 and is used to guide its movement. The weight limit switch 4 is fixedly connected above the end of the upward path of the hoist hook pulley block 1, and its trigger output end is connected to a weight 6 connected to the other end of the insulating rod 2 via a traction rope 5. The weight limit switch 4 is used to trigger the hoist hook pulley block 1 to stop running.

[0019] When the hoist hook pulley block 1 is running and not in contact with the insulating rod 2, the counterweight 6 provides gravity to tension the traction rope 5. The trigger output of the counterweight limit switch 4 is not triggered by the gravity of the counterweight 6. When the hoist hook pulley block 1 moves upward to the end of the rising path and contacts the insulating rod 2, it drives the insulating rod 2 to move upward. The guide component 3 guides the movement of the insulating rod 2. The counterweight 6 moves upward with the insulating rod 2. The trigger output of the counterweight limit switch 4 experiences a reduction in tension. The counterweight limit switch 4 triggers the hoist hook pulley block 1 to stop running, and the hoist hook pulley block 1 no longer continues to move upward.

[0020] The upper limit device for lifting the weight of the hoist hook has a relatively simple structure, and is relatively easy to install and maintain. It transmits force through the insulating rod 2, the traction rope 5, and the weight 6, so the impact force on the weight limit switch 4 is relatively small, making the operation of the hoist hook pulley block 1 safer.

[0021] The hoist hook pulley block 1 is an existing structure and may include a pulley, a lifting rope that cooperates with the pulley, and a motor connected to the lifting rope. The motor winds up or unwinds the lifting rope to drive the pulley to rise or fall.

[0022] Specifically, when the counterweight limit switch 4 is triggered, the motor that controls the operation of the hoist hook pulley block 1 stops running, and the hoist hook pulley block 1 no longer moves upward.

[0023] In this embodiment, the traction rope 5 is a steel rope with sufficient structural strength; the counterweight limit switch 4 is an existing anti-overwind switch, which will not be described in detail here.

[0024] To better understand this solution, further structural optimization will be performed below.

[0025] First is guide component 3, such as Figure 1As shown, according to another embodiment of the present invention, the upper limit device for lifting weight of hoist hook includes a guide assembly 3 comprising a guide seat 31 and a guide rod 32. The guide seat 31 is fixedly connected above the end of the rising path of the hoist hook pulley block 1. One end of the guide rod 32 is connected to one end of the insulating rod 2, and the other end slides vertically into the guide seat 31 to form a limit head 33.

[0026] In this embodiment, the limiting head 33 prevents the guide rod 32 from disengaging from the guide seat 31. The guide rod 32 and the guide seat 31 are slidably connected to guide the movement of the insulating rod 2 and ensure the stable movement of the insulating rod 2.

[0027] For ease of installation, the guide rod 32 and the insulating rod 2 are detachably connected by a connector 7.

[0028] The connector 7 includes a connecting body 71, a first interface cylinder 72, and a second interface cylinder 73. The first interface cylinder 72 is rotatably connected to the connecting body 71 and is used to connect to one end of the insulating rod 2. The second interface cylinder 73 is rotatably connected to the connecting body 71 and is used to connect to one end of the guide rod 32.

[0029] In this embodiment, the connecting body 71, the first interface cylinder 72, and the second interface cylinder 73 are arranged in an "L" shape. The first interface cylinder 72 and the insulating rod 2, as well as the second interface cylinder 73 and the guide rod 32, can be connected by threads, which has sufficient connection stability and is convenient and quick to assemble and disassemble.

[0030] Secondly, it facilitates the disassembly and assembly of the counterweight 6 and the insulating rod 2, such as... Figure 1 and Figure 2 As shown, according to another embodiment of the present invention, the upper limit device for lifting the weight of a hoist hook is provided, wherein the weight 6 and the insulating rod 2 are connected by a detachable connection structure 8.

[0031] The detachable connection structure 8 includes a connection notch 81 and a connecting rod 82. The connection notch 81 is opened on the corresponding end of the insulating rod 2. The connecting rod 82 is connected between the traction rope 5 and the counterweight 6. After passing through the connection notch 81, it cooperates with the counterweight 6 through a locking cap 83 threaded onto it to clamp and fix the insulating rod 2.

[0032] During installation: insert the connecting rod 82 into the connecting notch 81, and then rotate the locking cap 83 to move it closer to the counterweight 6 until the end of the insulating rod 2 is stably clamped between the counterweight 6 and the locking cap 83.

[0033] During disassembly: rotate the locking cap 83 to move it away from the counterweight 6 until the end of the insulating rod 2 is released from the clamp between the counterweight 6 and the locking cap 83. Then, move the connecting rod 82 out of the connecting notch 81 to disengage the counterweight 6 from the insulating rod 2.

[0034] Finally, the insulation rod 2 was optimized, such as... Figure 3 and Figure 4 As shown, according to another embodiment of the present invention, the upper limit device for lifting weight of hoist hook is provided, wherein the insulating rod 2 is connected to anti-jamming balance plates 9 on both sides of the middle part for cooperating with the hoist hook pulley block 1.

[0035] Because the top surface of the pulley in the hoist hook pulley block 1 that contacts the insulating rod 2 is arc-shaped, in order to increase the contact area between the insulating rod 2 and the pulley, anti-jamming balance plates 9 are designed on both sides of the middle part of the insulating rod 2 to ensure that the insulating rod 2 moves upward stably with the pulley; at the same time, the design of the two anti-jamming balance plates 9 also prevents the insulating rod 2 from slipping into the pulley and getting stuck between the pulley and the lifting rope that cooperates with the pulley, which would cause unsafe hazards.

[0036] The upper limit device for the lifting weight of this hoist hook is used as follows:

[0037] When the hoist hook pulley block 1 is running and not in contact with the insulating rod 2, the counterweight 6 provides gravity to tension the traction rope 5. The trigger output terminal of the counterweight limit switch 4 is not triggered by the gravity of the counterweight 6, and the limit head 33 abuts against the guide seat 31.

[0038] When the hoist hook pulley block 1 moves upward to the end of the rising path and contacts the insulating rod 2, it drives the insulating rod 2 to move upward. The guide rod 32 slides relative to the guide seat 31 to guide the movement of the insulating rod 2. The counterweight 6 moves upward with the insulating rod 2. The trigger output terminal of the counterweight limit switch 4 experiences a reduction in tension. The counterweight limit switch 4 triggers the hoist hook pulley block 1 to stop running, and the hoist hook pulley block 1 no longer continues to move upward.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A kind of upper limiting device of hoist and draw weight of gourd hook, it is characterized by, include: An insulating rod, which acts at the end of the upward path of the hoist hook pulley block; A guide assembly, which is connected to one end of an insulating rod and is used to guide its movement. A counterweight limit switch is fixedly connected above the end of the rising path of the hoist hook pulley block, and its trigger output end is connected to a counterweight connected to the other end of the insulating rod via a traction rope. The counterweight limit switch is used to trigger the hoist hook pulley block to stop running.

2. The upper limiting device of the lifting weight of the cable hoist according to claim 1, characterized in that, The guiding component includes: A guide seat, which is fixedly connected above the end of the rising path of the hoist hook pulley block; A guide rod, one end of which is connected to one end of an insulating rod, and the other end of which slides vertically into a guide seat to form a limiting head.

3. The upper limiting device of the lifting weight of the chain hoist according to claim 2, characterized in that, The guide rod and the insulating rod are detachably connected by a connector.

4. The upper limiting device of the lifting weight of the ascensional hook according to claim 3, characterized in that, The connector includes: Connect the main body; The first interface cylinder is rotatably connected to the connecting body and is used to connect to one end of the insulating rod. The second interface cylinder is rotatably connected to the connecting body and is used to connect to one end of the guide rod.

5. The upper limiting device of the lifting weight of the ascensional hook according to claim 1, characterized in that, The hammer and the insulating rod are connected by a detachable connection structure.

6. The upper limiting device of the lifting weight of the ascensional hook according to claim 5, characterized in that, The detachable connection structure includes: A connection notch is provided at the corresponding end of the insulating rod; A connecting rod is connected between the traction rope and the counterweight. After passing through the connecting notch, the connecting rod cooperates with the counterweight through a locking cap threaded onto it to clamp and fix the insulating rod.

7. The upper limiting device of a lifting weight of an elevator according to claim 1, wherein Both sides of the middle section of the insulating rod are connected to anti-jamming balance plates for use with the pulley block of the hoist hook.

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