Anti-falling structure of excavator road wheel

Abstract

The utility model relates to the technical field of supporting wheel, provide a kind of excavator supporting wheel anti-drop structure, basically solve the risk of elastic baffle ring drop for the outside fixing of sealing plate. The excavator supporting wheel anti-drop structure includes wheel body, wheel shaft, bearing, oil seal and sealing plate;Wheel shaft passes through wheel body along axis, and annular cavity between wheel shaft and wheel body is installed with bearing, skeleton oil seal from inside to outside in both ends, and the opening of annular cavity is encapsulated by sealing plate, and sealing plate is fixed on the stepped surface of wheel body end portion by elastic baffle ring, characterized by: retaining structure is equipped on sealing plate, retaining structure includes limiting plate and elastic member, limiting plate can pass the opening of elastic baffle ring under the elastic force of elastic member, and the two side walls of limiting plate and the two clamping parts of elastic baffle ring abut, and its front end is inserted into baffle groove.

Description

Technical Field

[0001] This utility model relates to the field of track roller technology, specifically to an excavator track roller anti-fall-off structure. Background Technology

[0002] The track roller of an excavator is a key component of the tracked travel mechanism, and its performance directly affects the overall stability, reliability, and service life of the machine. The track roller's wheel body and axle are connected by bearings, and an oil seal is installed on the outside of the bearing, secured by a sealing plate. In one of the applicant's track rollers, the sealing plate is fixed to the stepped surface at the end of the wheel body using an elastic retaining ring; however, this elastic retaining ring carries the risk of detachment.

[0003] Therefore, we propose a structure to prevent excavator track rollers from falling off. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides an excavator track roller anti-fall-off structure to solve the above-mentioned problems in the prior art.

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

[0006] An anti-detachment structure for an excavator track roller includes a wheel body, a wheel axle, bearings, oil seals, and a sealing plate. The wheel axle passes through the wheel body along its axis. Bearings and a skeleton oil seal are installed from the inside out at both ends of an annular cavity between the wheel axle and the wheel body. The opening of the annular cavity is sealed by a sealing plate, which is fixed to a stepped surface at the end of the wheel body by an elastic retaining ring. The structure is characterized by:

[0007] The sealing plate is provided with a retaining structure, which includes a limiting plate and an elastic element. The limiting plate can pass through the opening of the elastic retaining ring under the elastic force of the elastic element, and the two side walls of the limiting plate abut against the two clamping parts of the elastic retaining ring, and its front end is inserted into the groove of the retaining ring.

[0008] Furthermore, the limiting plate is attached to the sealing plate, and the limiting plate is provided with a pair of waist-shaped holes parallel to its own length direction. The sealing plate is connected to guide pins corresponding to each waist-shaped hole, and the guide pins pass through the waist-shaped holes and slide guide with the waist-shaped holes.

[0009] The elastic element is a tension spring, with one end of the tension spring connected to a guide pin and the other end connected to a limiting plate.

[0010] Furthermore, a groove is formed on the sealing plate, and the limiting plate is slidably installed in the groove.

[0011] Preferably, the bottom of the groove is provided with an elastic pin, and the limiting plate is provided with a positioning pin hole. When the limiting plate overcomes the tension spring and disengages outward from the opening of the elastic retaining ring, the elastic pin can be inserted into the positioning pin hole.

[0012] Furthermore, the side of the limiting plate opposite to the elastic retaining ring is folded outward to form a toggle plate, and the other end of the tension spring is connected to the toggle plate.

[0013] Furthermore, the front end of the limiting plate is arc-shaped to match the bottom of the retaining ring groove.

[0014] Furthermore, the front end of the limiting plate has chamfers on both sides.

[0015] This invention provides an anti-detachment structure for excavator track rollers, offering the following advantages: This innovative "retaining structure" actively limits the radial deformation and axial movement of the elastic retaining ring, essentially eliminating the significant risk of retaining ring detachment inherent in previous technologies. This improvement directly enhances sealing reliability, protects bearings from lubrication failure and contamination damage, and ultimately significantly extends the track roller's lifespan, ensuring the excavator's stability and reliability, especially in high-vibration and impact environments. The structure is relatively simple (typically requiring only the addition of a stamped / forged limiting plate and a spring to the sealing plate), making modification easy and cost-effective, yet the anti-detachment effect and its associated benefits (sealing assurance, bearing protection, extended lifespan, and reduced maintenance) are remarkable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure that maintains the structure in this utility model;

[0019] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0020] In the picture:

[0021] 1. Wheel body;

[0022] 2. Wheel and axle;

[0023] 3. Seal the plate;

[0024] 4. Elastic retaining ring;

[0025] 5. Bearings;

[0026] 6. Inner retaining ring;

[0027] 7. Oil seal;

[0028] 8. Maintain the structure;

[0029] 81a. Front-end;

[0030] 81b, Chamfer;

[0031] 81c, oblong hole;

[0032] 82. Toggle plate;

[0033] 83. Guide pin;

[0034] 84. Tension spring. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] See attached document Figure 1-4 An anti-fall-off structure for a track roller of an excavator includes a wheel body 1, a wheel axle 2, a bearing 5, an oil seal 7, and a sealing plate 3;

[0037] The axle 2 passes through the wheel body 1 along its axis. Bearings 5 ​​and oil seals 7 are installed from the inside out at both ends of the annular cavity between the axle 2 and the wheel body 1. The bearings 5 ​​and oil seals 7 are installed in a conventional manner. For example, the outer ring of the bearing 5 is positioned by the inner step and outer retaining ring of the wheel body 1 on both sides, and the inner ring is positioned by the outer step and inner retaining ring 6 of the axle 2 on both sides (the inner and outer retaining rings are also elastic retaining rings 4, installed in their respective retaining ring grooves). The limiting flange at the axial outer end of the oil seal 7 is synchronously pressed against the rear ring by the sealing plate 3. The spring retaining lip at the axial inner end of the oil seal 7 is in contact with the end face of the inner retaining ring. The front surface at the axial inner end of the oil seal 7 is in contact with the end face of the outer retaining ring. The outer side of the radially outer side of the oil seal 7 is in contact with the inner cavity sidewall of the wheel body 1. The sub-sealing lip and dustproof lip at the radially inner side of the oil seal 7 are in contact with the axle 2.

[0038] The opening of the annular cavity is sealed by a sealing plate 3, and the sealing plate 3 is pressed and limited by an elastic retaining ring 4 onto the stepped surface at the end of the wheel body 1;

[0039] The sealing plate 3 is provided with a retaining structure 8, which includes a limiting plate and an elastic element. The limiting plate can pass through the opening of the elastic retaining ring 4 under the elastic force of the elastic element, and the two side walls of the limiting plate abut against the two clamping parts of the elastic retaining ring 4, and its front end 81a is inserted into the retaining ring groove (for installing the elastic retaining ring 4).

[0040] In this embodiment, the limiting plate is attached to the sealing plate 3. The limiting plate has a pair of waist-shaped holes 81c parallel to its own length direction. The sealing plate 3 is connected to guide pins 83 corresponding to each waist-shaped hole 81c. The guide pins 83 pass through the waist-shaped holes 81c and slide and guide each other with the waist-shaped holes 81c. The side of the limiting plate away from the elastic retaining ring 4 is folded outward to form a toggle plate 82. By pressing the toggle plate 82 and pulling it outward, the limiting plate is disengaged from the elastic retaining ring 4, which is convenient to operate.

[0041] The elastic element is a tension spring 84, with one end hooked to the guide pin 83 and the other end hooked to the hook hole of the actuating plate 82.

[0042] Preferably, a groove is formed on the sealing plate 3, and the limiting plate is slidably installed in the groove to improve the stability and accuracy of the limiting plate's movement. The bottom of the groove is provided with an elastic pin, and the limiting plate is provided with a positioning pin hole. When the limiting plate overcomes the tension spring 84 and disengages outward from the opening of the elastic retaining ring 4, the elastic pin can be inserted into the positioning pin hole, thereby maintaining the limiting plate detached from the elastic retaining ring 4 and facilitating subsequent disassembly of the elastic retaining ring 4. The groove and elastic pin are not shown in the figure.

[0043] In this embodiment, the front end 81a of the limiting plate is arc-shaped to match the bottom of the retaining ring groove. After the limiting plate is inserted into the retaining ring groove, it can fit snugly against the bottom of the groove, improving the stability of the structure. The front end 81a of the limiting plate has chamfers 81b on both sides to facilitate insertion of the limiting plate into the opening of the elastic retaining ring 4.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] 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 the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A structure for preventing the track roller of an excavator from falling off, comprising a wheel body, a wheel axle, bearings, oil seals, and a sealing plate; the wheel axle passes through the wheel body along its axis, and bearings and skeleton oil seals are installed from the inside to the outside at both ends of an annular cavity between the wheel axle and the wheel body; the opening of the annular cavity is sealed by a sealing plate, and the sealing plate is fixed to the stepped surface at the end of the wheel body by an elastic retaining ring, characterized in that: The sealing plate is provided with a retaining structure, which includes a limiting plate and an elastic element. The limiting plate can pass through the opening of the elastic retaining ring under the elastic force of the elastic element, and the two side walls of the limiting plate abut against the two clamping parts of the elastic retaining ring, and its front end is inserted into the groove of the retaining ring.

2. The excavator track roller anti-fall-off structure as described in claim 1, characterized in that: The limiting plate is attached to the sealing plate. The limiting plate has a pair of oblong holes parallel to its own length direction. The sealing plate is connected to guide pins corresponding to each oblong hole. The guide pins pass through the oblong holes and slide and guide each other through the oblong holes. The elastic element is a tension spring, with one end of the tension spring connected to a guide pin and the other end connected to a limiting plate.

3. The excavator track roller anti-fall-off structure as described in claim 2, characterized in that: A groove is formed on the sealing plate, and the limiting plate is slidably installed in the groove.

4. The excavator track roller anti-fall-off structure as described in claim 3, characterized in that: The bottom of the chute is provided with an elastic pin, and the limiting plate is provided with a positioning pin hole. When the limiting plate overcomes the tension spring and moves outward from the opening of the elastic retaining ring, the elastic pin can be inserted into the positioning pin hole.

5. The excavator track roller anti-fall-off structure as described in claim 2, characterized in that: The limiting plate is folded outward on the side opposite to the elastic retaining ring to form a toggle plate, and the other end of the tension spring is connected to the toggle plate.

6. The anti-fall-off structure for excavator track rollers as described in claim 1, characterized in that: The front end of the limiting plate is arc-shaped to match the bottom of the retaining ring groove.

7. The excavator track roller anti-fall-off structure as described in claim 6, characterized in that: The front end of the limiting plate has chamfers on both sides.

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