A locking unit, track and walking device

Abstract

This invention provides a locking unit, track, and traveling device, relating to the field of engineering machinery. The locking unit includes a connecting shaft, retaining rings, and two opposing track links. Each track link has a first connecting hole. Both ends of the connecting shaft are respectively fitted into the first connecting holes of the two track links. Retaining rings are installed in the first connecting holes of each track link, abutting against both ends of the connecting shaft to prevent axial movement of the connecting shaft. The track includes the aforementioned locking unit, and the traveling device includes the aforementioned track. This locking unit, track, and traveling device not only improve the axial locking force of the connecting shaft, ensuring that the connecting shaft is not easily dislodged from the track links during normal operation, but also facilitates the disassembly of the connecting shaft.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery, and more specifically, to a locking unit, track, and walking device. Background Technology

[0002] Tracks are an important component of the walking mechanism of hydraulic construction machinery, widely used in hydraulic excavators, pavers, muck loaders, and bulldozers. The main function of tracks is to convert the driving torque and rotational motion transmitted from the engine to the drive wheels into the driving force required for the machine to move, and to support the entire machine and its load.

[0003] Currently, common track systems consist of left and right track links, pins, and other components. The pins are connected to the left and right track links via interference fit. Due to special operating conditions, such as when the main machine is under high-intensity operation, the kingpin may come out of the track link due to insufficient interference force, resulting in a higher risk of track failure. On the other hand, as excavators increase in tonnage and use larger dimensions, the interference force between the pin and the left and right track links becomes too high, making disassembly and assembly difficult for customers and after-sales personnel, and complicating maintenance. Summary of the Invention

[0004] The purpose of this invention is to provide a locking unit, track, and walking device that can effectively improve the above-mentioned technical problems.

[0005] The embodiments of the present invention are implemented as follows:

[0006] In a first aspect, embodiments of the present invention provide a locking unit, including a connecting shaft, a retaining ring, and two track links disposed opposite to each other. Each track link is provided with a first connecting hole. The two ends of the connecting shaft are respectively transitionally fitted with the first connecting holes of the two track links. The retaining ring is installed in the first connecting holes of the two track links. The two retaining rings abut against the two ends of the connecting shaft to prevent the connecting shaft from moving along its axial direction.

[0007] In an optional embodiment, the inner wall of the first connecting hole is recessed with a groove for fitting the retaining ring.

[0008] In an optional embodiment, an installation space is formed between the two track links, and each track link is further provided with a second connection hole communicating with the first connection hole. In the same track link, the second connection hole is closer to the installation space than the first connection hole.

[0009] The locking unit also includes a sleeve, the two ends of which respectively engage with the second connecting holes on the two track links, and the sleeve is fitted over the outside of the connecting shaft.

[0010] In an optional embodiment, the sleeve is clearance-fitted with the connecting shaft.

[0011] In an optional embodiment, a lubricating layer is coated between the inner wall of the sleeve and the outer wall of the connecting shaft.

[0012] In an optional embodiment, the diameter of the second connecting hole is larger than the diameter of the first connecting hole, and a step is formed between one end of the second connecting hole and one end of the first connecting hole;

[0013] The locking unit also includes a sealing element, which is provided in each of the second connection holes. The two sides of the sealing element abut against the end of the sleeve and the stepped portion, respectively, to prevent the lubricating layer from leaking.

[0014] In an optional embodiment, the sealing element includes a wear-resistant ring and a sealing ring, which are sleeved side by side on the connecting shaft along the axial direction of the connecting shaft. One side of the sealing ring abuts against the stepped portion, the other side of the sealing ring abuts against the wear-resistant ring, and the other side of the wear-resistant ring abuts against the end of the sleeve.

[0015] In an optional embodiment, the locking unit further includes a thrust ring sleeved on the connecting shaft. The thrust ring is located inside the second connecting hole. One side of the thrust ring abuts against the stepped portion, and the other end of the thrust ring is used to abut against the end of the sleeve when the sleeve moves axially relative to the connecting shaft, so as to limit the sleeve.

[0016] Secondly, embodiments of the present invention provide a track, including the locking unit described in any of the foregoing embodiments.

[0017] Thirdly, embodiments of the present invention provide a walking device, including the tracks described in the foregoing embodiments.

[0018] The beneficial effects of the embodiments of the present invention include, for example:

[0019] This invention provides a locking unit comprising a connecting shaft, retaining rings, and two opposing track links. Each track link has a first connecting hole. Both ends of the connecting shaft are respectively fitted into the first connecting holes of the two track links. This reduces the interference force between the connecting shaft and the first connecting holes, facilitating disassembly and maintenance. Furthermore, retaining rings are installed in the first connecting holes of both track links, abutting against both ends of the connecting shaft. These retaining rings prevent the connecting shaft from moving axially, thus preventing it from dislodging from the track links during operation.

[0020] This invention also provides a track that includes the aforementioned locking unit and possesses all the functions of the locking unit. This track also offers the advantages of easy maintenance and preventing the connecting shaft from slipping out of the track link during operation.

[0021] This invention also provides a traveling device that includes the aforementioned track and possesses all the functions of the track. This traveling device also offers the advantages of easy maintenance and preventing the connecting shaft from slipping off the track link during operation. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the locking unit provided in an embodiment of the present invention;

[0024] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0025] Figure 3 This is a schematic diagram of the structure of a track link provided in an embodiment of the present invention;

[0026] Figure 4 for Figure 2 Enlarged diagram of point B in the middle.

[0027] Icons: 1-Locking unit; 11-Connecting shaft; 12-Retaining ring; 13-Chain link; 131-First connecting hole; 132-Second connecting hole; 133-Groove; 134-Step portion; 14-Installation space; 15-Sleeve; 16-Seal; 161-Wear-resistant ring; 162-Sealing ring; 17-Thrust ring. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] Please refer to Figures 1-3 This embodiment provides a locking unit 1, which includes a connecting shaft 11, a retaining ring 12, and two track links 13. The two track links 13 are arranged opposite to each other, and each track link 13 is provided with a first connecting hole 131. Both ends of the connecting shaft 11 are respectively transition-fitted with the first connecting holes 131 of the two track links 13. In this way, the interference force between the connecting shaft 11 and the first connecting hole 131 can be reduced, which facilitates the subsequent disassembly of the connecting shaft 11 for maintenance.

[0035] In addition, in this embodiment, a retaining ring 12 is installed in the first connecting hole 131 of each of the two track links 13. The two retaining rings 12 abut against the two ends of the connecting shaft 11 respectively. In this way, the two retaining rings 12 can limit the connecting shaft 11 in its axial direction and prevent the connecting shaft 11 from going out of the track link 13 during operation.

[0036] In other words, in this embodiment, the locking unit 1 not only increases the axial locking force of the connecting shaft 11, ensuring that the connecting shaft 11 is not easily pulled out of the track link 13 during normal operation, but also has the beneficial effect of facilitating the disassembly of the connecting shaft 11.

[0037] Please refer to Figures 2-4 In this embodiment, the inner wall of the first connecting hole 131 is recessed with a groove 133, and the retaining ring 12 is embedded in the groove 133. In this way, the inner wall of the groove 133 can limit the retaining ring 12, and at the same time, the retaining ring 12 can limit the connecting shaft 11.

[0038] It should be noted that in this embodiment, the groove 133 is an annular hole structure. After the retaining ring 12 is embedded in the groove 133, the inner wall of the groove 133 can resist the various parts of the retaining ring 12 in the circumferential direction, so that the retaining ring 12 is not easy to deflect under the action of the connecting shaft 11.

[0039] In other embodiments, the retaining ring 12 can also be directly installed on the inner wall of the first connecting hole 131. For example, the retaining ring 12 is integrally formed with the inner wall of the first connecting hole 131, and the retaining ring 12 is welded to the inner wall of the first connecting hole 131.

[0040] Please refer to Figure 1 and Figure 3 In this embodiment, two track links 13 are spaced apart, forming an installation space 14 between the two track links 13, and each track link 13 is also provided with a second connecting hole 132.

[0041] In the same track link 13, the second connecting hole 132 communicates with the first connecting hole 131, and the second connecting hole 132 is closer to the mounting space 14 than the first connecting hole 131. That is, one end of the second connecting hole 132 communicates with one end of the first connecting hole 131, and the other end of the second connecting hole 132 communicates with the mounting space 14.

[0042] In this embodiment, the locking unit 1 further includes a sleeve 15, the two ends of which are respectively engaged with the second connecting holes 132 on the two track links 13, and the sleeve 15 is sleeved on the outside of the connecting shaft 11.

[0043] Specifically, in this embodiment, the sleeve 15 and the connecting shaft 11 are clearance-fitted. In actual use, the sleeve 15 can rotate relative to the connecting shaft 11.

[0044] It should be noted that, in this embodiment, a lubricating layer is coated between the inner wall of the sleeve 15 and the outer wall of the connecting shaft 11. The lubricating layer can reduce the frictional resistance between the sleeve 15 and the connecting shaft 11, reduce wear between the inner wall of the sleeve 15 and the outer wall of the connecting shaft 11, and extend the service life of the sleeve 15 and the connecting shaft 11.

[0045] It should be noted that, in this embodiment, the lubricating layer is made of grease.

[0046] It should be noted that in this embodiment, the connecting shaft 11 and the sleeve 15 are respectively selected as pin shaft and pin sleeve, which is convenient for processing and manufacturing.

[0047] Please refer to Figures 1-3 In this embodiment, the diameter of the second connecting hole 132 is larger than the diameter of the first connecting hole 131, so that a step portion 134 can be formed between the end of the second connecting hole 132 near the first connecting hole 131 and the end of the first connecting hole 131 near the second connecting hole 132.

[0048] In this embodiment, the locking unit 1 further includes a sealing element 16, which is disposed in the second connecting hole 132. The two sides of the sealing element 16 abut against the end of the sleeve 15 and the stepped portion 134, respectively.

[0049] In this way, the seal 16 can seal the gap between the sleeve 15 and the connecting shaft 11, and can prevent part of the lubricating layer between the sleeve 15 and the connecting shaft 11 from leaking out.

[0050] Specifically, in this embodiment, the sealing element 16 includes a wear-resistant ring 161 and a sealing ring 162. The wear-resistant ring 161 and the sealing ring 162 are sleeved side by side on the connecting shaft 11 along the axial direction of the connecting shaft 11. One side of the sealing ring 162 abuts against the stepped portion 134, the other side of the sealing ring 162 abuts against the wear-resistant ring 161, and the other side of the wear-resistant ring 161 abuts against the end of the sleeve 15.

[0051] With the combined effect of the wear-resistant ring 161 and the sealing ring 162, the overall sealing performance is better and the sealing effect is better.

[0052] It should be noted that during actual installation, after the second connecting hole 132 is installed on the sleeve 15, the wear ring 161 and the sealing ring 162 are under compression due to the abutment between the sleeve 15 and the stepped portion 134. Understandably, the compressed sealing ring 162 has better sealing performance and can better prevent partial leakage of the lubricating layer.

[0053] It is understandable that the aforementioned seal 16 is installed in the second connection hole 132 of both track links 13, so that the seal 16 in the two second connection holes 132 can seal both ends of the connecting shaft 11.

[0054] Please refer to Figure 2 and Figure 4 In this embodiment, the locking unit 1 further includes a thrust ring 17, which is sleeved on the connecting shaft 11. One side of the thrust ring 17 abuts against the step portion 134, and the other end of the thrust ring 17 has a gap with the end of the sleeve 15. This gap can be used to buffer the movement of the sleeve 15.

[0055] During use, when the sleeve 15 moves axially relative to the connecting shaft 11 along the connecting shaft 11, the thrust ring 17 can restrict the axial movement of the sleeve 15, thereby limiting the sleeve 15 in the axial direction of the connecting shaft 11 and preventing the sleeve 15 from moving too far and causing a safety accident.

[0056] It should be noted that in this embodiment, a thrust ring 17 is provided in the second connecting hole 132 of both track links 13, and the two thrust rings 17 can simultaneously limit the axial movement of the sleeve 15.

[0057] This embodiment also provides a track, which includes the aforementioned locking unit 1. In actual use, the track includes multiple locking units 1, and the track links 13 of two adjacent locking units 1 are interconnected for mutual transmission, thereby realizing the overall movement of the track.

[0058] This embodiment also provides a walking device, which includes the aforementioned track. It is understood that the walking device may further include a drive unit, a transmission mechanism, etc. The drive unit is connected to the track via the transmission mechanism, so that when the drive unit is activated, it can drive the track to move, and the drive unit can provide power for the movement of the track.

[0059] The above description is merely a specific embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A locking unit, characterized in that, The assembly includes a connecting shaft (11), retaining rings (12), and two opposing track links (13). Each track link (13) is provided with a first connecting hole (131). The two ends of the connecting shaft (11) are respectively fitted with the first connecting holes (131) of the two track links (13). The retaining rings (12) are installed in the first connecting holes (131) of the two track links (13). The two retaining rings (12) abut against the two ends of the connecting shaft (11) to prevent the connecting shaft (11) from moving along its axial direction. The inner wall of the first connecting hole (131) is recessed with a groove (133) for fitting the retaining ring (12); An installation space (14) is formed between the two track links (13), and each track link (13) is also provided with a second connection hole (132) communicating with the first connection hole (131). In the same track link (13), the second connection hole (132) is closer to the installation space (14) than the first connection hole (131). The locking unit (1) also includes a sleeve (15), the two ends of which are respectively engaged with the second connecting holes (132) on the two track links (13), and the sleeve (15) is sleeved on the outside of the connecting shaft (11); A lubricating layer is coated between the inner wall of the sleeve (15) and the outer wall of the connecting shaft (11); The diameter of the second connecting hole (132) is larger than the diameter of the first connecting hole (131), and a step portion (134) is formed between one end of the second connecting hole (132) and one end of the first connecting hole (131); The locking unit (1) further includes a sealing element (16), and each of the second connecting holes (132) is provided with the sealing element (16). The two sides of the sealing element (16) abut against the end of the sleeve (15) and the step portion (134) respectively to prevent the lubricating layer from leaking. The sealing element (16) includes a wear-resistant ring (161) and a sealing ring (162). The wear-resistant ring (161) and the sealing ring (162) are sleeved side by side on the connecting shaft (11) along the axial direction of the connecting shaft (11). One side of the sealing ring (162) abuts against the stepped portion (134), and the other side of the sealing ring (162) abuts against the wear-resistant ring (161). The other side of the wear-resistant ring (161) abuts against the end of the sleeve (15). The locking unit (1) further includes a thrust ring (17) sleeved on the connecting shaft (11). The thrust ring (17) is located inside the second connecting hole (132). One side of the thrust ring (17) abuts against the stepped portion (134). The other end of the thrust ring (17) is used to abut against the end of the sleeve (15) when the sleeve (15) moves axially relative to the connecting shaft (11) along the connecting shaft (11) to limit the sleeve (15).

2. The locking unit according to claim 1, characterized in that, The sleeve (15) is clearance-fitted with the connecting shaft (11).

3. A track, characterized in that, Includes the locking unit (1) as described in claim 1 or 2.

4. A walking device, characterized in that, Includes the track as described in claim 3.

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