A protective structure for an electric clamp

Abstract

This utility model discloses a protective structure for an electric clamping device, relating to the field of rail crane technology. It includes a clamping device cylinder housing, a limit screw fixedly mounted on the surface of the cylinder housing, a movable sleeve slidably mounted on the surface of the limit screw, a limit sliding sleeve fixedly connected to the left end of the movable sleeve, a ball bearing mounted on the inner wall of the limit sliding sleeve, and the inner side of the ball bearing slidably connected to the surface of the limit screw. A protective mechanism is also provided on the surface of the clamping device cylinder housing. This utility model significantly improves the operational stability and reliability of the clamping device and reduces the failure rate: by adding a modified retaining ring inside the electric clamping device cylinder push rod, it effectively avoids the problem of excessive compression of the ball bearing at the end of the screw, leading to screw thread deformation and ball wear. This improvement significantly reduces the probability of clamping device failure during operation and improves the overall stability and reliability of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of rail crane technology, and in particular to a protective structure for an electric clamp. Background Technology

[0002] Rail-mounted gantry cranes are heavy-duty lifting equipment commonly used in ports, logistics centers, and other similar locations. They mainly consist of four traveling mechanisms: the trolley, the auxiliary trolley, the hoisting mechanism, and the slewing mechanism. The trolley mechanism is equipped with wheel-side brakes, also known as electric wheel clamps, which act on the trolley wheels to lock and unlock them. These electric wheel clamps need to be frequently opened and locked in conjunction with trolley travel commands, directly impacting loading and unloading efficiency.

[0003] Existing electric wheel clamps have the following problems:

[0004] 1. Frequent Failures and Their Impact

[0005] Electric wheel clamps frequently malfunction during use, mainly manifested as the cylinder push rod getting stuck or failing to return to its original position. Once the wheel clamp malfunctions, it directly leads to a reduction in loading and unloading efficiency. Moreover, since the wheel clamp needs to be returned to the factory for repair, the repair cycle can take more than half a month. This not only incurs huge time and transportation costs, but also means that the equipment cannot be used normally during the malfunction period, affecting production efficiency.

[0006] 2. Fault Cause Analysis

[0007] Through independent disassembly and analysis of multiple faulty electric wheel clamps, the main cause of the failure was found to be:

[0008] Excessive compression of ball bearings: Inside the push rod of the electric chuck cylinder, the ball bearing can run along the lead screw until it reaches the end cap seal ring position. Due to the excessively long lead screw stroke (130mm), the motor drives the push rod to move the ball bearing to the stop position and then continues to compress the washer, causing the thread at the end of the lead screw (the relief groove position) to deform and the thread diameter of the lead screw to wear.

[0009] Ball wear and jamming: The small balls inside the ball bearing contact and move on the worn lead screw. Over time, the balls age and wear down, eventually getting stuck during daily clamping or releasing operations and no longer returning to their original position, causing the clamp to malfunction.

[0010] Traditional electric wheel clamp designs do not fully consider the interaction between ball bearings and lead screws and the potential wear and failures that may result. This leads to frequent malfunctions during actual use, high maintenance costs, and long maintenance cycles, which seriously affect production efficiency.

[0011] In summary, existing electric wheel clamps have obvious design flaws, and a new type of protective structure is needed to solve their operational stability and reliability problems. Utility Model Content

[0012] This utility model discloses a protective structure for an electric clamp, which significantly improves the operational stability and reliability of the equipment, increases loading and unloading efficiency and production benefits, and facilitates maintenance and troubleshooting. These beneficial effects make the improved clamp more practical and economically valuable in applications such as rail-mounted cranes.

[0013] To achieve the above objectives, the present invention adopts the following technical solution:

[0014] A protective structure for an electric clamp includes a clamp cylinder housing. A limit screw is fixedly provided on the surface of the clamp cylinder housing. A movable sleeve is slidably provided on the surface of the limit screw. A limit sliding sleeve is fixedly connected to the left end of the movable sleeve. A ball bearing is provided on the inner wall of the limit sliding sleeve. The inner side of the ball bearing is slidably connected to the surface of the limit screw.

[0015] The surface of the cylinder housing of the wheel clamp is provided with a protective mechanism. The protective mechanism includes a positioning mounting sleeve fixedly connected to the surface of the cylinder housing. Two liquid storage boxes are symmetrically arranged on the upper and lower surfaces of the positioning mounting sleeve, and two positioning blocks are symmetrically arranged on the left and right surfaces of the positioning mounting sleeve. A rectangular sliding groove is formed on the surface of the positioning block. A buffer slider is slidably arranged on the inner wall of the rectangular sliding groove. One end of the buffer slider extends to the outside of the rectangular sliding groove and is fixedly connected to a fixing block. A limit ring is fixedly connected between the two fixing blocks. The position of the limit ring corresponds to the limit sliding sleeve. A linkage ring is fixedly connected to the surface of the limit ring.

[0016] In a preferred embodiment, a return spring is provided inside the rectangular slide groove. One end of the return spring is fixedly connected to the inner wall of the rectangular slide groove, and the other end of the return spring is fixedly connected to the surface of the buffer slider.

[0017] In a preferred embodiment, two symmetrical movable push rods are fixedly connected to the surface of the linkage ring. The end of the movable push rod away from the limiting ring extends into the interior of the liquid storage box, and a piston block is fixedly connected to the end of the movable push rod. The piston block is slidably connected to the inner wall of the liquid storage box.

[0018] In a preferred embodiment, two liquid guide pipes are symmetrically arranged on the inner wall of the clamping cylinder housing, and an atomizing nozzle is fixedly provided at the end of the liquid guide pipe. The output end of the atomizing nozzle corresponds to the surface of the limiting screw.

[0019] In a preferred embodiment, the inlet end of the liquid guide tube is fixedly connected to a delivery tube, the end of the delivery tube away from the liquid guide tube extends into the interior of the liquid storage box, and a one-way valve is fixedly provided on the surface of the delivery tube.

[0020] In a preferred embodiment, an air inlet pipe is fixedly embedded on the surface of the liquid storage box, a one-way air inlet valve is fixedly installed on the surface of the air inlet pipe, a liquid filling pipe is fixedly embedded on the surface of the liquid storage box, and a cap is threadedly connected to the end of the liquid filling pipe.

[0021] In a preferred embodiment, a limiting support ring is fixedly connected to the end of the positioning mounting sleeve. The outer diameter of the limiting support ring is smaller than the inner diameter of the limiting retaining ring, and the limiting retaining ring is slidably connected to the surface of the limiting support ring.

[0022] As can be seen from the above, the protective structure of the electric clamp provided by this utility model has the following technical effects.

[0023] Firstly, this invention significantly improves the operational stability and reliability of the wheel clamp and reduces the failure rate: by adding a modified retaining ring inside the hydraulic cylinder push rod of the electric wheel clamp, the problem of excessive compression of the ball bearing at the end of the screw, which leads to deformation of the screw thread and wear of the balls, is effectively avoided. This improvement significantly reduces the probability of the wheel clamp failing during operation and improves the overall stability and reliability of the equipment.

[0024] Secondly, it enhances lubrication and cooling. The liquid reservoir, piston block, liquid guide pipe, and atomizing nozzle in the protective mechanism together constitute a lubrication and cooling system. When the limiting sleeve moves to the end of the thread of the limiting screw, the piston block moves within the liquid reservoir through the linkage ring, thereby evenly spraying lubricating oil or coolant onto the surface of the limiting screw through the liquid guide pipe and atomizing nozzle. This effectively reduces friction between components and provides the necessary cooling effect, preventing equipment failure due to overheating. Attached Figure Description

[0025] Figure 1 This is a front view structural diagram of the present invention.

[0026] Figure 2 This is a side view of the structure of this utility model.

[0027] Figure 3 This is a partial cross-sectional view of the present invention.

[0028] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle.

[0029] Figure 5 This is a schematic diagram of the internal structure of the positioning block of this utility model.

[0030] In the attached diagram: 1. Clamping wheel cylinder housing; 2. Limiting screw; 3. Moving sleeve; 4. Limiting sliding sleeve; 5. Ball bearing; 6. Protective mechanism;

[0031] 601. Positioning mounting sleeve; 602. Liquid storage box; 603. Positioning block; 604. Rectangular slide groove; 605. Buffer slider; 606. Limiting retaining ring; 607. Linkage ring; 608. Return spring; 609. Movable push rod; 610. Piston block; 611. Liquid guide tube; 612. Atomizing nozzle; 613. Delivery pipe; 614. Air inlet pipe; 615. Liquid filling pipe; 616. Limiting support ring; 617. Fixing block. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0033] Reference Figures 1 to 5 A protective structure for an electric clamp includes a clamp cylinder housing 1, which is the main body of the entire protective structure and is used to support and fix other components. Its surface undergoes special treatment to improve wear resistance and corrosion resistance, ensuring good working condition even in harsh environments.

[0034] The limit screw 2 is fixedly mounted on the surface of the hydraulic cylinder housing 1 of the wheel clamp, and its surface has precision threads for sliding connection with the movable sleeve 3. The limit screw 2 is made of high-strength, high-wear-resistant alloy steel to ensure its stability and durability during use.

[0035] The movable sleeve 3 is slidably disposed on the surface of the limiting screw 2, and its left end is fixedly connected to the limiting sleeve 4. The inner wall of the limiting sleeve 4 is provided with a ball bearing 5, and the inner side of the ball bearing 5 is slidably connected to the surface of the limiting screw 2 to reduce frictional resistance and improve sliding efficiency.

[0036] It is worth noting that the protective mechanism 6 is the core part of this utility model, including components such as the positioning and mounting sleeve 601, the liquid storage box 602, the positioning block 603, the rectangular slide groove 604, the buffer slider 605, the limiting retaining ring 606, the linkage ring 607, the reset spring 608, the movable push rod 609, the piston block 610, the liquid guide tube 611, the atomizing nozzle 612, the delivery tube 613, the air inlet tube 614, the liquid filling tube 615, and the limiting support ring 616.

[0037] The positioning mounting sleeve 601 is fixedly connected to the surface of the wheel clamp cylinder housing 1 for mounting and fixing components of other protective mechanisms 6.

[0038] The reservoir 602 is symmetrically arranged on the surface of the positioning and mounting sleeve 601 and is used to store lubricating oil or coolant. The surface of the reservoir 602 is provided with a filling pipe 615 and a cap for easy addition or replacement of liquid by the user.

[0039] The positioning blocks 603 are symmetrically arranged on the surface of the positioning mounting sleeve 601 for mounting the rectangular slide groove 604 and the buffer slider 605.

[0040] A rectangular groove 604 is formed on the surface of the positioning block 603 for sliding the buffer slider 605. A return spring 608 is provided inside the rectangular groove 604 to provide buffering and reset functions.

[0041] The buffer slider 605 is slidably disposed on the inner wall of the rectangular slide groove 604, with one end extending to the outside of the rectangular slide groove 604 and fixedly connected to a fixing block 617. During the sliding process, the buffer slider 605 is subjected to the force of the return spring 608, realizing the buffering and reset functions.

[0042] It is worth noting that the limiting retaining ring 606 is fixedly connected between the two fixed blocks 617, and its position corresponds to that of the limiting sliding sleeve 4. The limiting retaining ring 606 is used to limit the sliding range of the limiting sliding sleeve 4 to prevent excessive movement that could damage the equipment.

[0043] The linkage ring 607 is fixedly connected to the surface of the limit ring 606 and is used to drive the movable push rod 609 to move.

[0044] The movable push rod 609 is symmetrically fixedly connected to the surface of the linkage ring 607, with one end extending into the interior of the liquid storage box 602 and fixedly connected to the piston block 610. The movable push rod 609 moves under the drive of the linkage ring 607, thereby pushing the piston block 610 to move within the liquid storage box 602.

[0045] The piston block 610 is slidably connected to the inner wall of the liquid storage box 602, and is used to push out the liquid in the liquid storage box 602.

[0046] A liquid guide tube 611 is symmetrically arranged on the inner wall of the cylinder housing 1 of the clamping wheel, and an atomizing nozzle 612 is fixedly provided at its end. The liquid guide tube 611 is used to transport the liquid pushed out by the piston block 610 to the atomizing nozzle 612. The atomizing nozzle 612 is inclinedly arranged on the surface of the liquid guide tube 611, and the atomizing nozzle 612 and the limiting screw 2 maintain an angle of about 45 degrees.

[0047] It should be noted that the atomizing nozzle 612 is located at the end of the liquid guide tube 611, and its output end corresponds to the surface of the limiting screw 2. The atomizing nozzle 612 sprays liquid evenly onto the surface of the limiting screw 2 to achieve lubrication and cooling effects.

[0048] The delivery pipe 613 is fixedly connected to the inlet end of the liquid guide pipe 611 and extends into the interior of the liquid storage box 602. A one-way valve is provided on the surface of the delivery pipe 613 to control the flow direction of the liquid.

[0049] It should be noted that the air inlet pipe 614 is fixedly embedded in the surface of the liquid storage box 602 and is equipped with a one-way air inlet valve. The air inlet pipe 614 is used to replenish gas into the liquid storage box 602 to maintain liquid pressure.

[0050] The liquid filling tube 615 is fixedly embedded in the surface of the liquid storage box 602, and its end is threaded with a cap. The liquid filling tube 615 is used to add liquid into the liquid storage box 602.

[0051] It should be further explained that the limiting support ring 616 is fixedly connected to the end of the positioning mounting sleeve 601, and its outer diameter is smaller than the inner diameter of the limiting retaining ring 606. The limiting support ring 616 is used to support and position the limiting retaining ring 606, ensuring its stability during sliding.

[0052] The protective structure for the electric clamp provided by this utility model has achieved significant results in practical applications. Firstly, by adding the protective mechanism 6, wear on the limit screw 2 and the movable sleeve 3 is effectively prevented, extending the service life of the equipment. Secondly, the lubrication and cooling system significantly reduces frictional resistance between components, improving the operating efficiency and stability of the equipment. Furthermore, this protective structure simplifies the equipment maintenance process, improves maintenance efficiency, and reduces maintenance costs.

[0053] Working principle: During the operation of the electric clamp, when the limiting sleeve 4 slides on the limiting screw 2, if it reaches the preset position, the limiting sleeve 4 will push the limiting retaining ring 606 to move. The movement of the limiting retaining ring 606 drives the linkage ring 607 and the movable push rod 609 to move, which in turn pushes the piston block 610 to move within the liquid storage box 602. The movement of the piston block 610 pushes out the lubricating oil or coolant in the liquid storage box 602, which is then transported to the atomizing nozzle 612 through the delivery pipe 613 and the liquid guide pipe 611. The atomizing nozzle 612 sprays the liquid evenly onto the surface of the limiting screw 2, achieving lubrication and cooling effects.

[0054] Meanwhile, when the limiting sleeve 4 is subjected to external force during its movement, the buffer slider 605 slides within the rectangular groove 604 and compresses the return spring 608, thereby absorbing the impact force and slowing down the movement speed of the limiting sleeve 4. When the external force disappears, the return spring 608 releases energy, pushing the buffer slider 605 and the limiting sleeve 4 to reset.

[0055] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A protection structure of an electric clamp, comprising a clamp wheel cylinder housing (1), characterized in that, A limiting screw (2) is fixedly provided on the surface of the cylinder housing (1) of the wheel clamp. A movable sleeve (3) is slidably provided on the surface of the limiting screw (2). A limiting sleeve (4) is fixedly connected to the left end of the movable sleeve (3). A ball bearing (5) is provided on the inner wall of the limiting sleeve (4). The inner side of the ball bearing (5) is slidably connected to the surface of the limiting screw (2). The surface of the clamp cylinder housing (1) is provided with a protective mechanism (6). The protective mechanism (6) includes a positioning mounting sleeve (601) fixedly connected to the surface of the clamp cylinder housing (1). Two liquid storage boxes (602) are symmetrically arranged on the upper and lower surfaces of the positioning mounting sleeve (601), and two positioning blocks (603) are symmetrically arranged on the left and right surfaces of the positioning mounting sleeve (601). A rectangular sliding groove (604) is opened on the surface of the positioning block (603). A buffer slider (605) is slidably arranged on the inner wall of the rectangular sliding groove (604). One end of the buffer slider (605) extends to the outside of the rectangular sliding groove (604) and is fixedly connected to a fixing block (617). A limit ring (606) is fixedly connected between the two fixing blocks (617). The position of the limit ring (606) corresponds to the limit sliding sleeve (4). A linkage ring (607) is fixedly connected to the surface of the limit ring (606).

2. A guard structure for an electric clamp according to claim 1, characterized in that A return spring (608) is provided inside the rectangular slide groove (604). One end of the return spring (608) is fixedly connected to the inner wall of the rectangular slide groove (604), and the other end of the return spring (608) is fixedly connected to the surface of the buffer slider (605).

3. A guard structure for an electric clamp according to claim 1, characterized in that Two symmetrical movable push rods (609) are fixedly connected to the surface of the linkage ring (607). The end of the movable push rod (609) away from the limiting ring (606) extends into the interior of the liquid storage box (602), and a piston block (610) is fixedly connected to the end of the movable push rod (609). The piston block (610) is slidably connected to the inner wall of the liquid storage box (602).

4. The protective structure of an electric clamp according to claim 3, characterized in that, The inner wall of the cylinder housing (1) of the clamping wheel is symmetrically provided with two liquid guide pipes (611). The end of the liquid guide pipe (611) is fixedly provided with an atomizing nozzle (612). The output end of the atomizing nozzle (612) corresponds to the surface of the limiting screw (2).

5. The protective structure of an electric clamp according to claim 4, characterized in that, The inlet of the liquid guide tube (611) is fixedly connected to the delivery tube (613), and the end of the delivery tube (613) away from the liquid guide tube (611) extends into the interior of the liquid storage box (602), and a one-way valve is fixedly provided on the surface of the delivery tube (613).

6. The protective structure of an electric clamp according to claim 5, characterized in that, An air inlet pipe (614) is fixedly embedded on the surface of the liquid storage box (602), and a one-way air inlet valve is fixedly installed on the surface of the air inlet pipe (614). A liquid filling pipe (615) is fixedly embedded on the surface of the liquid storage box (602), and a cap is threadedly connected to the end of the liquid filling pipe (615).

7. The protective structure of an electric clamp according to claim 1, characterized in that, The end of the positioning mounting sleeve (601) is fixedly connected to a limiting support ring (616). The outer diameter of the limiting support ring (616) is smaller than the inner diameter of the limiting retaining ring (606). The limiting retaining ring (606) is slidably connected to the surface of the limiting support ring (616).

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