Dustproof guide wheel assembly

Abstract

The utility model relates to the technical field of guide wheel assemblies, and discloses a dustproof guide wheel assembly which comprises a guide wheel body, a shaft sleeve is installed in an inner hole of the guide wheel body, the end of the shaft sleeve is in threaded connection with a plurality of bolts at equal intervals, the middle of each bolt is in threaded connection with an end cover, an annular groove B is formed in the end cover, and the annular groove B is in threaded connection with the shaft sleeve. A floating seal seat is arranged in the annular groove B. Cover plates are arranged at the two ends of the guide wheel body correspondingly, sealing rings are installed in the middles of inner holes of the cover plates, and sealing lips are arranged on the outer sides of the sealing rings. The cover plates are arranged at the two ends of the guide wheel, the bosses of the cover plates are connected with the end covers through the interference structures, the combined sealing rings are arranged in inner holes of the cover plates, pulverized coal and slurry can be effectively prevented from entering the guide wheel, the sawtooth-shaped annular grooves are formed in the end faces of the cover plates, and the annular labyrinth sealing structure of the guide wheel is a second seal for preventing pulverized coal dust from entering the guide wheel. And early failure of sealing is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of guide wheel assemblies, in particular to a dustproof guide wheel assembly. Background Art

[0002] In the crawler-type walking mechanism of construction machinery, the guide wheel assembly has a guiding function. The track chain slides on the guide wheel tread to guide the track to wind in the correct direction. The tensioning device is used to move the guide wheel back and forth to adjust the track tension.

[0003] The crawler-type walking device has a large ground contact area and good passability in muddy, swampy and soft roads. It is widely used in the walking system of engineering machinery. The guide wheel assembly is located in the front of the whole machine, which can guide the crawler to wind in the correct direction and keep the crawler at an appropriate tightness when moving with the tensioning device. The guide wheel assembly is generally sealed in the form of a floating seal assembly. In the existing technology, when exposed to harsh working conditions with a lot of dust and mud in coal mines, deserts and wetlands, dust and mud often accumulate inside the floating seal assembly, squeezing the O-ring, affecting the compression of the O-ring and the sealing surface pressure of the floating seal assembly, as well as the rust of the floating seal ring, resulting in early sealing failure. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a dust-proof guide wheel assembly, which aims to improve the problems of dust and mud accumulation inside the floating seal component in the prior art, affecting the compression of the O-ring and the sealing surface pressure of the floating seal component, as well as the rust of the floating seal ring, resulting in early sealing failure.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a dust-proof guide wheel assembly, including a guide wheel body, an inner hole of the guide wheel body is installed with a shaft sleeve, the end of the shaft sleeve is equidistantly threaded with multiple bolts, the middle of the bolt is threaded with an end cover, an annular groove B is provided inside the end cover, a floating seal seat is provided inside the annular groove B, cover plates are provided at both ends of the guide wheel body, a sealing ring is installed in the middle of the inner hole of the cover plate, and a sealing lip is arranged on the outside of the sealing ring.

[0006] As a further description of the above technical solution:

[0007] An O-ring is provided near the flange surface of the sleeve, a shaft is installed at the bottom of the guide wheel body, a screw plug is installed at the end of the shaft, a plurality of grooves C are equidistantly provided at the end of the end cover, an annular groove B is provided at the bottom of the inner side of the end cover, an end surface E is installed at the bottom of the annular groove B, and an outer circular surface is provided on the outer side of the floating seal seat.

[0008] As a further description of the above technical solution:

[0009] The outer circumferential surface of the sealing ring is interference-connected with the inner hole surface of the cover plate, and the serrated annular groove at the end of the cover plate is provided with a labyrinth sealing structure.

[0010] As a further description of the above technical solution:

[0011] A top screw removal hole H is provided on the outer side of the cover plate. An end surface F is provided on one side of the cover plate. An annular surface M is provided on the outer side of the end surface F. A serrated annular groove is provided on the outer side of the annular surface M.

[0012] As a further description of the above technical solution:

[0013] An annular groove A is formed on the inner circular surface of the end cover, and an annular groove is formed on one side of the inner portion of the cover plate.

[0014] As a further description of the above technical solution:

[0015] A floating seal groove is provided inside the floating seal seat, and a floating seal assembly is installed inside the floating seal groove.

[0016] The utility model has the following beneficial effects:

[0017] In the utility model, cover plates are provided at both ends of the guide wheel, the cover plate boss is connected to the end cover by an interference structure, and a combined sealing ring is provided in the inner hole of the cover plate, which can effectively prevent the entry of coal powder and mud. The end face of the cover plate has a serrated annular groove, and the annular labyrinth sealing structure formed by the end face of the floating seal seat is a second seal to prevent the entry of coal powder and dust. The end face of the cover plate contacts the end cover, which protects the connecting bolts, so that the device can avoid early sealing failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a dust-proof guide wheel assembly proposed by the present invention;

[0019] Figure 2 This is a diagram of the end cover of a dustproof guide wheel assembly proposed in the present invention;

[0020] Figure 3 This is a cross-sectional view of the end cover of a dust-proof guide wheel assembly proposed in the present invention;

[0021] Figure 4 This is a structural diagram of a floating seal seat of a dust-proof guide wheel assembly proposed in the present invention;

[0022] Figure 5 This is a cross-sectional view of a floating seal seat of a dust-proof guide wheel assembly proposed in the present invention;

[0023] Figure 6 This is a schematic diagram of a shaft sleeve of a dustproof guide wheel assembly proposed in the present invention;

[0024] Figure 7 This is a schematic structural diagram of a dust-proof guide wheel assembly proposed by the present invention;

[0025] Figure 8 A dustproof guide wheel assembly proposed by the utility model Figure 7 Enlarged view of point A in the middle;

[0026] Figure 9 This is a schematic diagram of the cover structure of a dust-proof guide wheel assembly proposed by the present invention;

[0027] Figure 10 This is a diagram showing the sealing ring structure of a dust-proof guide wheel assembly proposed in the present invention.

[0028] Legend:

[0029] 1. Guide wheel body; 2. Sealing ring; 3. Cover plate; 4. Bolt; 5. End cover; 6. Floating seal seat; 7. Floating seal assembly; 8. Bushing; 9. O-ring; 10. Shaft; 11. Screw plug; 12. Groove C; 13. Annular groove B; 14. End face E; 15. Annular groove A; 16. Outer cylindrical surface; 17. Floating seal groove; 18. Sealing lip; 19. Top screw removal hole H; 20. Serrated annular groove; 21. End face F; 22. Annular surface M; 23. Annular groove; 24. Interference fit; 25. Labyrinth seal structure. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Reference Figure 1-5The utility model provides an embodiment: a dustproof guide wheel assembly, including a guide wheel body 1, an inner hole of the guide wheel body 1 is installed with a shaft sleeve 8, the end of the shaft sleeve 8 is equidistantly threaded with a plurality of bolts 4, the middle of the bolt 4 is threaded with an end cover 5, which contacts the end cover 5 through the end face F of the cover plate 3, thereby protecting the connecting bolts 4, an annular groove B13 is opened inside the end cover 5, and a floating seal seat 6 is provided inside the annular groove B13. Cover plates 3 are provided at both ends of the guide wheel body 1, a sealing ring 2 is installed in the middle of the inner hole of the cover plate 3, and a sealing lip 18 is arranged on the outside of the sealing ring 2. The sealing lip 18 is a polyurethane foam. The urethane material rotates relative to the shaft 10 to form a seal, which can prevent external dust and mud foreign matter from entering. The outer cylindrical surface of the sealing ring 2 is interference connected with the inner hole surface of the cover plate 3. The serrated annular groove at the end of the cover plate 3 is provided with a labyrinth sealing structure 25. The inner hole of the cover plate 3 is provided with a combined sealing ring 2, which can effectively prevent the entry of coal powder and mud. The installation of the annular labyrinth sealing structure 25 can prevent the entry of coal powder and dust. A top screw disassembly hole H19 is provided on the outside of the cover plate 3, and an end face F21 is provided on one side of the cover plate 3. An annular surface M22 is provided on the outside of the annular surface M22. A serrated annular groove 20 is provided on the outside of the annular surface M22.

[0032] Reference Figure 5-10 An O-ring 9 is provided near the flange surface of the sleeve 8, a shaft 10 is installed at the bottom of the guide wheel body 1, and a screw plug 11 is installed at the end of the shaft 10. A plurality of grooves C12 are equidistantly provided at the end of the end cover 5, and an annular groove B13 is provided at the bottom of the inner side of the end cover 5. An end face E14 is installed at the bottom of the annular groove B13. An outer circular surface 16 is provided on the outer side of the floating seal seat 6, and an annular groove A15 is provided on the inner circular surface of the end cover 5. The installation of the annular groove A15 makes it easy to install the structure of this device. An annular groove 23 is provided on one side of the inner side of the cover plate 3, and a floating seal groove 17 is provided inside the floating seal seat 6. A floating seal assembly 7 is installed inside the floating seal groove 17. The installation of the floating seal assembly 7 makes the sealing effect of this device better.

[0033] Working principle: by providing cover plates 3 at both ends of the guide wheel, the cover plate 3 and the annular surface M22 are connected to the end cover 5 and the annular groove A15, and the inner hole of the cover plate 3 is provided with a combined sealing ring 2, which can effectively prevent the entry of coal powder and mud. The end face of the cover plate 3 has a serrated annular groove 20, and the gap with the end face of the floating seal seat 6 is 1 to 1.5mm. The outer cylindrical surface of the floating seal seat 6 and the annular matching groove of the end cover 5 have a gap of about 2 to 3mm, together forming an annular labyrinth sealing structure 25, which is the second seal for preventing the entry of coal powder and dust. The end face of the cover plate 3 is in contact with the end cover 5, which plays a protective role for the connecting bolts 4. The end face of the cover plate 3 is provided with two threaded top screw disassembly holes H19, which have good disassembly performance. Through the above process, the device can avoid early sealing failure.

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dustproof guide wheel assembly, comprising a guide wheel body (1), characterized in that: The inner hole of the guide wheel body (1) is provided with a shaft sleeve (8), the end of the shaft sleeve (8) is equidistantly threadedly connected to a plurality of bolts (4), the middle of the bolts (4) is threadedly connected to an end cover (5), an annular groove B (13) is provided inside the end cover (5), a floating seal seat (6) is provided inside the annular groove B (13), both ends of the guide wheel body (1) are provided with a cover plate (3), a sealing ring (2) is installed in the middle of the inner hole of the cover plate (3), and a sealing lip (18) is arranged on the outer side of the sealing ring (2).

2. The dustproof guide wheel assembly according to claim 1, characterized in that: An O-ring (9) is provided near the flange surface of the sleeve (8), a shaft (10) is installed at the bottom of the guide wheel body (1), a screw plug (11) is installed at the end of the shaft (10), a plurality of grooves C (12) are equidistantly provided at the end of the end cover (5), an annular groove B (13) is provided at the bottom of the inner side of the end cover (5), an end surface E (14) is installed at the bottom of the annular groove B (13), and an outer circular surface (16) is provided on the outer side of the floating seal seat (6).

3. The dustproof guide wheel assembly according to claim 1, characterized in that: The outer cylindrical surface of the sealing ring (2) is interference-connected (24) with the inner hole surface of the cover plate (3), and the serrated annular groove (20) at the end of the cover plate (3) is provided with a labyrinth sealing structure (25).

4. The dustproof guide wheel assembly according to claim 1, characterized in that: A top screw removal hole H (19) is provided on the outer side of the cover plate (3), an end surface F (21) is provided on one side of the cover plate (3), an annular surface M (22) is provided on the outer side of the end surface F (21), and a sawtooth annular groove (20) is provided on the outer side of the annular surface M (22).

5. The dustproof guide wheel assembly according to claim 1, characterized in that: An annular groove A (15) is provided on the inner circular surface of the end cover (5), and an annular groove (23) is provided on one side of the interior of the cover plate (3).

6. The dustproof guide wheel assembly according to claim 1, characterized in that: A floating seal groove (17) is provided inside the floating seal seat (6), and a floating seal assembly (7) is installed inside the floating seal groove (17).

Images