Thrust wheel with floating oil seal structure

Abstract

The utility model provides a thrust wheel with a floating oil seal structure, which relates to the technical field of excavator accessories, and comprises a thrust wheel body, the thrust wheel body comprises a shell, a bearing sleeve, a wheel shaft, a floating oil seal and an end cover, the end cover is provided with a sealing self-locking mechanism, and the sealing self-locking mechanism comprises a threaded block fixed on the side surface of the end cover. According to the thrust wheel with the floating oil seal structure, a fixing block is driven by a sliding rod to extrude a pressure spring until an annular limiting groove moves to the bottom of the sliding rod, at the moment, the sliding rod is driven by elastic force generated by deformation of the pressure spring to be inserted into the annular limiting groove, limiting of a rectangular sealing block is completed, and self-locking between a threaded cylinder and a threaded block is achieved; at the moment, the rectangular sealing block abuts against an annular sealing groove formed in the shell, the trapezoidal sealing block abuts against an annular sealing groove formed in the end cover, the sealing effect between the end cover and the cover plate is improved, meanwhile, self-locking can be achieved between the end cover and the cover plate, and the situation that the end cover and the cover plate loosen under violent vibration is avoided.

Description

Technical Field

[0001] The utility model relates to a track roller, in particular to a track roller with a floating oil seal structure, belonging to the technical field of excavator accessories. Background Technique

[0002] The track roller is an important component for crawler vehicles. Its main function is to support and guide the crawler during the vehicle's driving process, help disperse the vehicle's weight and reduce the wear of the ground on the crawler. The track rollers are installed on both sides of the vehicle chassis, usually arranged in pairs or in groups, and run along the track of the crawler. The working environment of the excavator is very harsh, and external sewage and sediment may enter the track roller through the gap between the end cover and the housing.

[0003] A track roller for an excavator disclosed in the Chinese Patent Publication Specification CN211642400U includes a housing, a rotating shaft, two elastic pins, a cover plate and two end covers. The circular ring-shaped insertion plate on the cover plate and the circular ring-shaped slot on the housing can be combined into a labyrinth seal structure to cover the gap between the housing and the end cover through the labyrinth seal structure, thereby achieving the effect of protecting the track roller.

[0004] In the above patent, the sealing effect between the housing and the end cover is improved by the cooperation of the circular ring-shaped slot and the circular ring-shaped insertion plate. It is found in actual application that there is still a certain gap between the end cover and the cover plate, and the sealing effect needs to be improved. In addition, the end cover and the cover plate are connected together by threads. During the use of the track roller, it will be subjected to severe vibration, and the end cover and the cover plate are prone to looseness, thereby reducing the sealing effect. Therefore, a track roller with a floating oil seal structure is proposed here. Content of the Utility Model

[0005] The utility model provides a track roller with a floating oil seal structure, which can improve the sealing effect between the end cover and the cover plate, and at the same time, the end cover and the cover plate can achieve self-locking to avoid loosening under severe vibration.

[0006] The utility model is realized through the following technical solutions: A track roller with a floating oil seal structure includes a track roller body, and the track roller body includes a housing, a bearing sleeve, a wheel shaft, a floating oil seal and an end cover, and a sealing self-locking mechanism is arranged on the end cover.

[0007] The sealing self-locking mechanism includes a threaded block fixed on the side surface of the end cover. A threaded cylinder is threadedly connected to the side surface of the threaded block. A cover plate is fixed on the inner wall of the threaded cylinder. The other side of the cover plate has a trapezoidal sealing block and a rectangular sealing block. An annular limiting groove is opened on the circumferential side surface of the cover plate. An annular sealing groove adapted to the rectangular sealing block is opened on the side surface of the housing, and an annular sealing groove adapted to the trapezoidal sealing block is opened on the side surface of the end cover.

[0008] A limiting shell is embedded in the outer shell. A fixing block is slidably connected to the inner wall of the limiting shell. A sliding rod that is slidably connected to the limiting shell is fixed on the fixing block. A compression spring sleeved on the side of the sliding rod is fixed between the fixing block and the limiting shell. The compression spring is inserted into an annular limiting groove.

[0009] Specifically, pin holes are formed at both ends of the axle. A cylindrical pin is arranged in the pin hole.

[0010] Specifically, a through hole is formed in the side surface of the end cover. A plug screwed to the cylindrical pin is arranged in the through hole.

[0011] Furthermore, the bearing sleeve is sleeved on the outside of the axle. The floating oil seal is arranged between the outer shell and the end cover.

[0012] Specifically, the upper end of the sliding rod penetrates through the limiting shell and extends above the limiting shell. A pull ring is fixed to the end of the sliding rod extending above the limiting shell.

[0013] Furthermore, a disassembly block is fixed to the side surface of the threaded cylinder. The outer contour of the disassembly block is hexagonal.

[0014] Specifically, a sealing gasket is fixed to the surface of the cover plate.

[0015] The utility model provides a road wheel with a floating oil seal structure, and the beneficial effects thereof are as follows:

[0016] By rotating the threaded cylinder of the road wheel with the floating oil seal structure, the threaded cylinder can drive the cover plate to rotate. At the same time, the cover plate moves horizontally in the axial direction of the axle. The trapezoidal sealing block and the rectangular sealing block will gradually screw into the annular sealing grooves formed in the outer shell and the end cover. During the process of the rectangular sealing block screwing into the annular sealing groove on the outer shell, the inclined surface of the rectangular sealing block will extrude the hemispherical body at the bottom of the sliding rod, so that the sliding rod drives the fixing block to extrude the compression spring until the annular limiting groove moves to the bottom of the sliding rod. At this time, the sliding rod drives the sliding rod to insert into the annular limiting groove under the elastic force generated by the deformation of the compression spring, completing the limitation of the rectangular sealing block, realizing the self-locking between the threaded cylinder and the threaded block. At this time, the rectangular sealing block abuts against the annular sealing groove formed in the outer shell, and the trapezoidal sealing block abuts against the annular sealing groove formed in the end cover, improving the sealing effect between the end cover and the cover plate. At the same time, self-locking can be achieved between the end cover and the cover plate, avoiding loosening of the two under severe vibration. Description of the Drawings

[0017] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 is a cross-sectional view of the internal structure of the outer shell and the threaded cylinder of the utility model;

[0019] Figure 3 For the present utility model Figure 2 Schematic enlarged view of the structure at position A;

[0020] Figure 4 Cross-sectional view of the internal structure of the limit shell of the present utility model;

[0021] Figure 5 Schematic diagram of the concave block structure of the present utility model.

[0022] Explanation of reference numerals in the drawings

[0023] 1. Idler wheel body; 101. Outer shell; 102. Bearing sleeve; 103. Wheel shaft; 104. Floating oil seal; 105. Plug; 106. End cover; 107. Cylindrical pin;

[0024] 2. Sealing self-locking mechanism; 201. Threaded block; 202. Threaded barrel; 203. Cover plate; 2031. Trapezoidal sealing block; 2032. Rectangular sealing block; 2033. Annular limit groove; 204. Limit shell; 205. Fixed block; 206. Slide bar; 207. Compression spring; 208. Pull ring; 209. Demounting block; 210. Sealing gasket. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figures 1 to 5 , the embodiment of the present utility model provides an idler wheel with a floating oil seal structure, including an idler wheel body 1. The idler wheel body 1 includes an outer shell 101, a bearing sleeve 102, a wheel shaft 103, a floating oil seal 104, and an end cover 106. Pin holes are provided at both ends of the wheel shaft 103, and a cylindrical pin 107 is arranged in the pin hole. The cylindrical pin 107 can fix the plug 105 and the wheel shaft 103 together. A through hole is provided on the side surface of the end cover 106, and a plug 105 threadedly connected to the cylindrical pin 107 is arranged in the through hole. The plug 105 can fix the position of the cylindrical pin 107. The bearing sleeve 102 is sleeved outside the wheel shaft 103, and the floating oil seal 104 is arranged between the outer shell 101 and the end cover 106.

[0027] Please pay special attention to refer to Figure 2 , Figure 3 , Figure 4 and Figure 5, a sealing and self-locking mechanism 2 is provided on the end cover 106. The sealing and self-locking mechanism 2 includes a threaded block 201 fixed to the side surface of the end cover 106. A threaded cylinder 202 is threadedly connected to the side surface of the threaded block 201. A disassembly block 209 is fixed to the side surface of the threaded cylinder 202. The outer contour of the disassembly block 209 is hexagonal. The setting of the disassembly block 209 facilitates the rotation of the threaded cylinder 202. A cover plate 203 is fixed to the inner wall of the threaded cylinder 202. On the other side of the cover plate 203, there are a trapezoidal sealing block 2031 and a rectangular sealing block 2032. An annular limiting groove 2033 is formed on the circumferential side surface of the cover plate 203. An annular sealing groove adapted to the rectangular sealing block 2032 is formed on the side surface of the outer shell 101. An annular sealing groove adapted to the trapezoidal sealing block 2031 is formed on the side surface of the end cover 106.

[0028] Please refer specifically to Figure 3 and Figure 5 , specifically, the trapezoidal sealing block 2031 will rotate while approaching the annular sealing groove formed on the side surface of the end cover 106 driven by the threaded cylinder 202. After the trapezoidal sealing block 2031 is screwed into the annular sealing groove formed on the side surface of the end cover 106, the gap between the end cover 106 and the cover plate 203 is reduced, improving the sealing effect between the end cover 106 and the cover plate 203. The rectangular sealing block 2032 will rotate while approaching the annular sealing groove formed on the side surface of the outer shell 101 driven by the threaded cylinder 202. After the rectangular sealing block 2032 is screwed into the annular sealing groove formed on the side surface of the outer shell 101, the gap between the outer shell 101 and the cover plate 203 is reduced, improving the sealing effect between the outer shell 101 and the cover plate 203. A sealing gasket 210 is fixed to the surface of the cover plate 203. The setting of the sealing gasket 210 can further improve the sealing effect.

[0029] A limiting shell 204 is embedded in the outer shell 101. A fixed block 205 is slidably connected to the inner wall of the limiting shell 204. A sliding rod 206 slidably connected to the limiting shell 204 is fixed to the fixed block 205. After the inclined surface of the rectangular sealing block 2032 contacts the hemispherical part at the bottom of the sliding rod 206, the sliding rod 206 will be squeezed, causing the sliding rod 206 to slide in the limiting shell 204. Then, the fixed block 205 is driven by the sliding rod 206 to squeeze the compression spring 207. Through the cooperation of the sliding rod 206 and the annular limiting groove 2033, the rectangular sealing block 2032 and the threaded cylinder 202 can be limited in the horizontal direction, preventing the threaded cylinder 202 from loosening between the threaded block 201 under severe vibration. A compression spring 207 sleeved on the side surface of the sliding rod 206 is fixed between the fixed block 205 and the limiting shell 204. The compression spring 207 is inserted into the annular limiting groove 2033.

[0030] The upper end of the sliding rod 206 penetrates through the limiting shell 204 and extends above the limiting shell 204. A pull ring 208 is fixed at one end of the sliding rod 206 extending above the limiting shell 204. The setting of the pull ring 208 facilitates the adjustment of the position of the sliding rod 206. By pulling the sliding rod 206 through the pull ring 208, the compression spring 207 can be squeezed through the fixed block 205. Furthermore, the sliding rod 206 can be moved under the drive of the pull ring 208, and the sliding rod 206 is moved out of the annular limiting groove 2033. At this time, the trapezoidal sealing block 2031 and the rectangular sealing block 2032 can be moved out of the annular sealing groove opened on the outer shell 101 and the end cover 106 by rotating the threaded cylinder 202.

[0031] Working principle: By rotating the threaded cylinder 202, the cover plate 203 can be driven to rotate. The cover plate 203 will move horizontally in the axial direction of the axle 103. The trapezoidal sealing block 2031 and the rectangular sealing block 2032 will gradually screw into the annular sealing groove opened on the outer shell 101 and the end cover 106 under the drive of the cover plate 203. During the process that the rectangular sealing block 2032 screws into the annular sealing groove on the outer shell 101, the inclined surface of the rectangular sealing block 2032 will squeeze the hemispherical body at the bottom of the sliding rod 206, so that the sliding rod 206 drives the fixed block 205 to squeeze the compression spring 207 until the annular limiting groove 2033 moves to the bottom of the sliding rod 206. At this time, the sliding rod 206 drives the sliding rod 206 to insert into the annular limiting groove 2033 under the elastic force generated by the deformation of the compression spring 207. The rectangular sealing block 2032 is limited by the cooperation of the sliding rod 206 and the annular limiting groove 2033, so that the cover plate 203 and the threaded cylinder 202 cannot move horizontally in the axial direction of the axle 103, realizing self-locking and not affecting the rotation of the outer shell 101. At this time, the rectangular sealing block 2032 abuts against the annular sealing groove opened on the outer shell 101, and the trapezoidal sealing block 2031 abuts against the annular sealing groove opened on the end cover 106, improving the sealing effect between the end cover 106 and the cover plate 203. At the same time, self-locking can be realized between the end cover 106 and the cover plate 203, avoiding the loosening of the two under severe vibration.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A roller with a floating oil seal structure, comprising a roller body (1), wherein the roller body (1) comprises a housing (101), a bearing sleeve (102), a wheel axle (103), a floating oil seal (104), and an end cover (106), wherein: The end cover (106) is provided with a sealing self-locking mechanism (2); The sealing self-locking mechanism (2) comprises a threaded block (201) fixed to a side surface of an end cover (106); a threaded barrel (202) is threadedly connected to the side surface of the threaded block (201); a cover plate (203) is fixed to the inner wall of the threaded barrel (202); a trapezoidal sealing block (2031) and a rectangular sealing block (2032) are provided on the other side of the cover plate (203); an annular limiting groove (2033) is provided on the circumferential side surface of the cover plate (203); an annular sealing groove matching the rectangular sealing block (2032) is provided on the side surface of the housing (101); and an annular sealing groove matching the trapezoidal sealing block (2031) is provided on the side surface of the end cover (106); A limiting shell (204) is embedded in the outer shell (101); a fixing block (205) is slidably connected to the inner wall of the limiting shell (204); a sliding rod (206) slidably connected to the limiting shell (204) is fixed on the fixing block (205); a compression spring (207) sleeved on the side of the sliding rod (206) is fixed between the fixing block (205) and the limiting shell (204); and the compression spring (207) is inserted into the annular limiting groove (2033).

2. The track roller with a floating oil seal structure according to claim 1, characterized in that: Both ends of the wheel axle (103) are provided with pin holes, and cylindrical pins (107) are arranged in the pin holes.

3. The track roller with a floating oil seal structure according to claim 2, characterized in that: A through hole is provided on the side of the end cover (106), and a plug (105) threadedly connected to the cylindrical pin (107) is provided in the through hole.

4. The track roller with a floating oil seal structure according to claim 1, characterized in that: The bearing sleeve (102) is sleeved on the outside of the wheel axle (103), and the floating oil seal (104) is arranged between the housing (101) and the end cover (106).

5. The track roller with a floating oil seal structure according to claim 1, characterized in that: The upper end of the sliding rod (206) passes through the limiting shell (204) and extends to the top of the limiting shell (204); a pull ring (208) is fixed to one end of the sliding rod (206) extending to the top of the limiting shell (204).

6. The track roller with a floating oil seal structure according to claim 1, characterized in that: A disassembly block (209) is fixed to the side surface of the threaded barrel (202), and the outer contour of the disassembly block (209) is a hexagon.

7. The track roller with a floating oil seal structure according to claim 1, characterized in that: A sealing gasket (210) is fixed on the surface of the cover plate (203).

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