A large loader floating oil seal assembly tool

Abstract

The utility model relates to oil seal assembly tool technical field, especially disclose a kind of large loader floating oil seal assembly tool, including two clamping units and loader unit of left-right symmetry arrangement, each clamping unit includes E-type frame and fixed plate, fixed plate is welded on E-type frame, E-type frame and fixed plate are at right angles welding, the opening edge of E-type frame is polished and handled, can effectively be inserted into the flange edge of transmission hub, three holes of 13mm diameter are set up on fixed plate, brake hub edge cover plate is provided with multiple bolt holes, the position of hole set up on fixed plate and the position of bolt hole on brake hub edge cover plate one-to-one correspondence, through clamping tool, final transmission hub and brake hub are stably, effectively linked and fixed, avoid transmission hub swing in the assembly process due to no fixation, prevent the surface pollution, damage caused by collision, drop of floating oil seal metal ring, ensure the integrity of metal ring working surface, ensure the sealing performance and working effectiveness of floating oil seal.

Description

Technical Field

[0001] This utility model relates to the field of oil pack assembly tools, and in particular to a floating oil pack assembly tool for a large loader. Background Technology

[0002] The final drive hub assembly of a large loader consists of a braking system and a transmission system. The braking system uses a wet clutch structure that engages with the output shaft. The output shaft transmits power to the transmission hub via gears and rotates along with the fixed tires. Therefore, a special floating seal device is used for sealing between these two parts. The floating oil seal is a compact mechanical seal mainly used in low-speed, heavy-load applications with rotating output. The floating oil seal consists of two identical metal rings and two rubber rings. Its working principle is that the pair of rubber rings, supported by the metal rings, form a closed space with the cavity (but do not contact the shaft). When rotating, the two ground surfaces of the metal rings rotate in contact, ensuring smooth operation and effectively sealing off external dust, water, mud, etc., protecting the internal lubricating grease from leakage.

[0003] When performing on-site maintenance and replacement of large loaders, the axle needs to be erected, with its center approximately 1.5 meters off the ground. The floating oil seal rubber ring and metal ring are then pressed into the installation positions of the brake drum and drive drum, respectively. Without external clamping, the metal ring is prone to slipping due to the elastic force of the compressed rubber ring. As the drive drum is hoisted and slowly moved closer to the brake drum, the metal rings gradually come into contact. At this point, since the drive drum has not yet had its bearings, glands, and large gear ring installed, and the surfaces of the two metal rings must not be contaminated or collided, maintenance personnel need to level the bottom of the drum, hold the drive drum on both sides, or simply tie a long wire around the brake drum and drive drum to tighten them. Positioning is crucial because the transmission bearing uses a radial thrust roller bearing, which is quite large. According to maintenance standards, after the bearing is simply installed, a crane needs to lift the large gear ring, and then use a positioning cover to press the gear ring and bearing together. The bearing clearance also needs to be adjusted by repeatedly removing and installing the cover and shims. The cover has 20 M16 bolt holes, and the bolts need to be tightened to a standard torque of 28.5KG / CM2. Since the transmission hub is only simply positioned, it is difficult to ensure that the transmission hub will not swing during these subsequent assembly processes. This means that the floating oil seal metal ring cannot be guaranteed not to be damaged by collision and lose its sealing effect. In fact, the metal ring may even fall off due to large swings, directly causing contamination and damage to the surface of the metal ring. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a floating oil seal assembly tool for large loaders. It solves the technical problem that when replacing floating oil seals on large loaders during on-site maintenance, the lack of effective fixation causes the transmission hub to swing during assembly, resulting in the floating oil seal metal ring being easily impacted, contaminated, or falling off, thus losing its sealing effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A floating oil pack assembly tool for a large loader includes two clamping units and a loader unit arranged symmetrically on the left and right. Each clamping unit includes an E-frame and a fixing plate. The fixing plate is welded to the E-frame, and the E-frame and the fixing plate are welded at right angles. The E-frame is made of 20mm iron plate, and its opening width is 24mm, which ensures the overall structural strength of the clamping tool and can stably withstand the forces during the assembly process.

[0007] Preferably, the loader unit includes a drive hub, a brake hub, metal rings, and rubber rings. The drive hub and brake hub are each provided with a mounting groove on their opposite ends. The two metal rings and two rubber rings are respectively installed in the two mounting grooves. The mounting grooves provide a pre-compression space for the rubber rings, enabling them to generate force through elastic deformation.

[0008] Preferably, the opening edge of the E-type frame is polished so that it can effectively fit into the flange edge of the transmission hub, preventing the transmission hub from shifting relative to the brake hub during assembly.

[0009] Preferably, the fixing plate has three holes with a diameter of 13mm, and the brake drum edge cover plate has multiple bolt holes. The positions of the holes on the fixing plate correspond one-to-one with the positions of the bolt holes on the brake drum edge cover plate, so that bolts removed from the brake drum can be used directly, simplifying the assembly operation.

[0010] Preferably, the fixing plate is 8mm thick, and its shape and welding angle are close to the edge of the brake drum, which increases the contact area between the fixing plate and the brake drum and makes the connection between the two tighter.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. By using clamping tools, the final drive hub and brake hub are smoothly and effectively connected and fixed, which avoids the drive hub from swinging during the assembly process due to lack of fixation. This also prevents surface contamination and damage to the floating oil seal metal ring caused by collision or detachment, ensuring the integrity of the metal ring's working surface and guaranteeing the sealing performance and working effectiveness of the floating oil seal.

[0013] Second, the tool has a simple structure and is easy to operate. It can be installed and fixed by simply removing the bolts on the outer cover plate of the brake hub and using the original bolts. After fixing, the drive wheel hub no longer shakes, eliminating the need for continuous hoisting protection by the crane and continuous left and right holding by maintenance personnel, which facilitates the subsequent installation of the final drive bearing and final drive gear ring. Attached Figure Description

[0014] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a diagram of the brake hub connection structure of this utility model;

[0017] Figure 3 This is a diagram of the metal ring connection structure of this utility model.

[0018] Illustration: 1. E-frame; 2. Fixing plate; 3. Drive hub; 4. Brake hub; 5. Metal ring. Detailed Implementation

[0019] This application provides a floating oil seal assembly tool for large loaders, which effectively solves the problem that when replacing floating oil seals on large loaders during on-site maintenance, the lack of effective fixation causes the drive hub to swing during assembly, leading to the floating oil seal metal ring being easily impacted, contaminated, or falling off, thus losing its sealing effect. The clamping tool smoothly and effectively connects and fixes the final drive hub and brake hub, avoiding the drive hub from swinging during assembly due to lack of fixation, preventing surface contamination and damage to the floating oil seal metal ring due to collision or falling off, ensuring the integrity of the metal ring's working surface, and ensuring the sealing performance and working effectiveness of the floating oil seal. Example

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, the technical solution in this application embodiment effectively solves the technical problem that when replacing floating oil seals on large loaders during on-site maintenance, the transmission hub is prone to swinging during assembly due to the lack of effective fixation, which leads to the floating oil seal metal ring being easily impacted, contaminated, or falling off, thus losing its sealing effect. The overall idea is as follows: A floating oil seal assembly tool for large loaders includes two clamping units and a loader unit arranged symmetrically on the left and right. Each clamping unit includes an E-type frame 1 and a fixing plate 2. The fixing plate 2 is welded to the E-type frame 1. The E-type frame 1 and the fixing plate 2 are welded at right angles. The E-type frame 1 is made of 20mm iron plate, and its opening width is 24mm. The symmetrical clamping unit design ensures the overall structural strength of the clamping tool and can stably withstand the force during the assembly process.

[0021] The loader unit includes a drive hub 3, a brake hub 4, a metal ring 5, and a rubber ring. The drive hub 3 and the brake hub 4 are provided with mounting grooves on opposite ends. The two metal rings 5 ​​and the two rubber rings are respectively installed in the two mounting grooves. The mounting grooves provide a pre-compression space for the rubber rings, so that they can generate force through elastic deformation to push the metal rings 5 ​​to fit together, which is a prerequisite for realizing the floating oil seal sealing function.

[0022] The opening edge of the E-type frame 1 is polished so that it can effectively snap into the flange edge of the transmission hub 3. The stable snap-fit ​​relationship ensures the reliable connection between the clamping unit and the transmission hub 3, and provides stable support for the subsequent fixed engagement between the fixing plate 2 and the brake hub 4, preventing the transmission hub 3 from shifting relative to the brake hub 4 during the assembly process.

[0023] The fixing plate 2 has three holes with a diameter of 13mm, and the edge cover plate of the brake drum 4 has multiple bolt holes. The positions of the holes on the fixing plate 2 correspond one-to-one with the positions of the bolt holes on the edge cover plate of the brake drum 4. The one-to-one correspondence of the holes ensures the precise connection between the clamping unit and the brake drum 4. The bolts removed from the brake drum 4 can be used directly for fixing without the need for additional adapters, which simplifies the assembly operation.

[0024] The fixing plate 2 is 8mm thick, and its shape and welding angle are fitted to the edge of the brake drum 4. The design of fitting the shape and welding angle to the edge of the brake drum 4 increases the contact area between the fixing plate 2 and the brake drum 4, making the connection between the two tighter and the force transmission more even.

[0025] To address the problems existing in the prior art, this utility model provides a floating oil seal assembly tool for large loaders. The clamping tool smoothly and effectively connects and fixes the final drive hub and brake hub, preventing the drive hub from swinging during assembly due to lack of fixation. It also prevents surface contamination and damage to the floating oil seal metal ring caused by collision or detachment, ensuring the integrity of the metal ring's working surface and guaranteeing the sealing performance and working effectiveness of the floating oil seal.

[0026] Working principle:

[0027] The first step is to pre-press the rubber ring and metal ring 5 into the corresponding mounting slots of the drive hub 3 and brake hub 4, respectively, before assembly. At this time, the rubber ring is in a compressed state.

[0028] The second step is to hoist the transmission hub 3 and slowly approach the brake hub 4 that has been installed in place. When the floating oil seal metal rings 5 ​​on the two gradually approach each other and are about to fit together, stop moving the transmission hub 3.

[0029] The third step is to remove the three fixing bolts on each side of the outer cover plate of brake drum 4, so that the outer cover plate of brake drum 4 forms a connection hole that matches the clamping tool.

[0030] Fourth step, insert the opening of E-frame 1 into the drive flange on the edge of the transmission hub 3, and fit the fixing plate 2 against the edge of the brake hub 4 so that the three 13mm diameter holes on the fixing plate 2 are precisely aligned with the holes after removing the bolts on the outer cover plate of the brake hub 4. Use the six bolts removed in step 3 to fix the fixing plate 2 to the outer cover plate of the brake hub 4, thus completing the connection between the tool and the two parts.

[0031] Fifth step, tighten the six bolts on the left and right sides evenly and symmetrically. After fixing, the transmission hub 3 will no longer wobble. At this time, it is safe to proceed with the subsequent installation and clearance adjustment of the final drive bearing, gear ring, and gland. After all parts are installed in place and the floating oil seal is in the working position, remove the clamping tools and reinstall the six bolts back into the original position of the brake hub 4 outer cover plate to complete the assembly.

[0032] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A floating oil packing assembly tool for a large loader, comprising two clamping units symmetrically arranged on the left and right sides and a loader unit, characterized in that, Each clamping unit includes an E-frame (1) and a fixing plate (2), the fixing plate (2) being welded to the E-frame (1), the E-frame (1) and the fixing plate (2) being welded at right angles, the E-frame (1) being made of 20mm iron plate, and its opening width being 24mm.

2. The floating oil tank assembly tool for a large loader as described in claim 1, characterized in that, The loader unit includes a drive hub (3), a brake hub (4), a metal ring (5), and a rubber ring. The drive hub (3) and the brake hub (4) are provided with mounting grooves on opposite ends. The two metal rings (5) and the two rubber rings are respectively installed in the two mounting grooves.

3. The floating oil tank assembly tool for a large loader as described in claim 2, characterized in that, The opening edge of the E-type frame (1) is polished so that it can be effectively inserted into the flange edge of the transmission hub (3).

4. The floating oil tank assembly tool for a large loader as described in claim 2, characterized in that, The fixing plate (2) has three holes with a diameter of 13mm.

5. A floating oil tank assembly tool for a large loader as described in claim 4, characterized in that, The brake hub (4) edge cover plate is provided with multiple bolt holes, and the position of the hole opened on the fixing plate (2) corresponds one-to-one with the position of the bolt hole on the brake hub (4) edge cover plate.

6. The floating oil tank assembly tool for a large loader as described in claim 1, characterized in that, The fixing plate (2) is 8mm thick, and its dimensions and welding angle are in contact with the edge of the brake drum (4).

Images