Chain wheel driving mechanism of railway ballast screening machine

Abstract

The chain wheel driving mechanism comprises a sleeve and a sleeve cover plate connected with the lower end of the sleeve, a driving piece is arranged at the upper end of the sleeve, an output end is arranged at the end, close to the sleeve, of the driving piece, the output end is connected with a transmission shaft on the inner side of the sleeve, and a connecting end is arranged at the end, away from the driving piece, of the transmission shaft. The connecting end extends out of the sleeve cover plate and is connected with a chain wheel, the connecting end and the chain wheel are provided with a first through hole and a second through hole in the direction perpendicular to the transmission shaft respectively, and connecting rods are arranged in the first through hole and the second through hole. By arranging the transmission shaft, the driving piece is prevented from being directly connected with the chain wheel, the bending moment borne by the output end of the driving piece is reduced, the service life of the driving piece is prolonged, meanwhile, the transmission shaft is connected with the chain wheel through the connecting rod, and the chain wheel is prevented from being separated from the connecting end.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transit construction equipment, and particularly relates to a sprocket drive mechanism of a ballast screening machine. Background Technique

[0002] A ballast screening machine is a mechanical device used for railway maintenance. Its main function is to dig out and screen the dirty ballast on the railway bed, backfill the qualified ballast onto the line, and supplement some new ballast to restore the performance of the roadbed.

[0003] The ballast screening machine mainly drives the digging chain on the digging beam to rotate through a driving member to carry out ballast cleaning work. At present, the commonly used connection method is that the driving member is directly connected to the sprocket, so as to drive the digging chain connected to the sprocket to rotate. During the process of the digging chain cleaning the ballast, the ballast generates a large resistance to the digging chain, so that the connection end of the driving member and the sprocket bears a large bending moment, affecting the service life of the driving member. In addition, after the sprocket is damaged, the workload during the replacement process is large and the efficiency is low. Summary of the Invention

[0004] The purpose of the utility model is to provide a sprocket drive mechanism of a ballast screening machine for the problems existing in the prior art. The utility model is convenient to install and avoids the direct connection between the sprocket and the driving member from affecting the service life of the driving member.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A sprocket drive mechanism of a ballast screening machine includes a sleeve. A driving member is provided at the upper end of the sleeve. The driving member is connected with a transmission shaft inside the sleeve. A connection end is arranged at the end of the transmission shaft far from the driving member. The connection end is connected with a sprocket. A radial first through hole is arranged on the connection end, and a second through hole passing through the center of the circle is arranged on the sprocket. A connecting rod is arranged in the first through hole and the second through hole. The connection end and the sprocket are connected through the connecting rod.

[0007] In the above technical solution, the rotational force provided by the driving member is transmitted to the sprocket through the transmission shaft, avoiding the direct connection between the driving member and the sprocket, reducing the bending moment borne by the driving member, and improving the service life of the driving member. At the same time, when assembling the sprocket, rotate the sprocket to align the first through hole and the second through hole, and then insert the connecting rod to realize the connection between the connection end and the sprocket, avoiding the sprocket from disengaging from the connection end. This assembly method is simple and convenient, improving the assembly efficiency, and also facilitating replacement when the sprocket is damaged.

[0008] Further, the driving member is provided with an output end. A connection groove is arranged in the middle of the end of the transmission shaft close to the driving member. The output end is located in the connection groove. The driving member drives the transmission shaft to rotate through the output end.

[0009] Further, a first limiting step is provided at one end of the sleeve close to the driving member, a first bearing is provided on the first limiting step, and the transmission shaft is connected to the sleeve through the first bearing. The stability of the rotation of the transmission shaft is ensured by the first bearing.

[0010] Further, a third limiting step is provided below the first limiting step, and a first sealing ring is provided between the third limiting step and the first bearing. The lubricating oil added can be prevented from leaking out through the first sealing ring.

[0011] Further, a second limiting step is provided at one end of the sleeve close to the sprocket, a limiting ring is provided below the second limiting step, a second bearing is provided between the limiting ring and the second limiting step, and the transmission shaft is connected to the sleeve through the second bearing. The stability of the rotation of the transmission shaft is further improved by the second bearing.

[0012] Further, a plurality of oil injection holes are provided on the circumferential side of the sleeve. Lubricating oil is injected through the oil injection holes to ensure the lubrication between components and reduce friction.

[0013] Further, an anti-wear block is provided in the middle of the end face of the sprocket, and the end face of the connection end does not extend beyond the end face of the anti-wear block. The anti-wear block can prevent the ballast from directly wearing the sprocket and improve the service life of the sprocket.

[0014] Further, a fixing plate and a plurality of connecting pieces are provided on the outer periphery of the sleeve, and the fixing plate and the plurality of connecting pieces are used for connecting to external fixing points. The connecting pieces are connected to the column of the excavating mechanism, and the fixing plate is connected to the excavating beam of the excavating mechanism, so that the sprocket driving mechanism of the present invention is fixedly connected to the excavating mechanism.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. By providing a transmission shaft to transmit the rotary force provided by the driving member to the sprocket, direct connection between the driving member and the sprocket is avoided, the bending moment borne by the driving member is reduced, and the service life of the driving member is improved.

[0017] 2. When assembling the sprocket, rotate the sprocket to align the first through hole and the second through hole, and then insert the connecting rod to realize the connection between the connection end and the sprocket, avoiding the sprocket from detaching from the connection end. This assembly method is simple and convenient, improves the assembly efficiency, and is also convenient for replacement when the sprocket is damaged.

[0018] 3. The sprocket driving mechanism of the present invention is fixedly connected to the excavating mechanism by connecting the connecting pieces to the column of the excavating mechanism and connecting the fixing plate to the excavating beam of the excavating mechanism. Description of the Drawings

[0019] Figure 1 The first sectional view of the sprocket drive mechanism of a ballast screening machine of the present utility model;

[0020] Figure 2 The second sectional view of the sprocket drive mechanism of a ballast screening machine of the present utility model;

[0021] Figure 3 The structural schematic diagram of the sprocket drive mechanism of a ballast screening machine of the present utility model;

[0022] Figure 4 Of the sprocket drive mechanism of a ballast screening machine of the present utility model Figure 1 Partial enlarged view at A;

[0023] Figure 5 Of the sprocket drive mechanism of a ballast screening machine of the present utility model Figure 1 Partial enlarged view at B;

[0024] Figure 6 The structural schematic diagram of the transmission shaft of the sprocket drive mechanism of a ballast screening machine of the present utility model;

[0025] Figure 7 The structural schematic diagram of the sprocket of the sprocket drive mechanism of a ballast screening machine of the present utility model.

[0026] In the figure: 1, driving part; 101, output end; 2, transmission shaft; 201, connecting groove; 202, connecting end; 203, first through hole; 204, limiting edge; 3, sleeve; 301, first limiting step; 302, second limiting step; 303, third limiting step; 4, sprocket; 401, second through hole; 5, connecting rod; 6, first bearing; 7, second bearing; 8, limiting ring; 9, sleeve cover plate; 10, oil injection hole; 11, first sealing ring; 12, second sealing ring; 13, anti-wear block; 14, fixing plate; 15, connecting piece; 1501, first connecting plate; 1502, second connecting plate. Detailed implementation manners

[0027] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present utility model.

[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "middle", "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0029] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] The following Figures 1 to 7 , through specific embodiments and their application scenarios, a sprocket drive assembly for a ballast screening machine provided by an embodiment of the present utility model will be described in detail.

[0031] A sprocket drive mechanism of a ballast screening machine includes a sleeve 3. A driving member 1 is provided at the upper end of the sleeve 3. The driving member 1 is connected with a transmission shaft 2 inside the sleeve 3. A connecting end 202 is provided at one end of the transmission shaft 2 away from the driving member 1. A sprocket 4 is connected to the connecting end 202. A radial first through hole 203 is provided on the connecting end 202. A second through hole 401 passing through the center of the circle is provided on the sprocket 4. A connecting rod 5 is arranged in the first through hole 203 and the second through hole 401. The connecting end 202 and the sprocket 4 are connected through the connecting rod 5.

[0032] Specifically, as Figure 1 shown, the connecting end 202 extends out of the bottom end of the sleeve 3 and is splined to the sprocket 4, so that the sprocket 4 can rotate together with the transmission shaft 2, thereby driving the excavation chain connected to the sprocket 4 to rotate. The diameters of the first through hole 203 and the second through hole 401 are the same. A connecting rod 5 is also arranged in the first through hole 203 and the second through hole 401. Threads are provided on the connecting rod 5. Optionally, the connecting rod 5 is an internal hexagonal screw. When assembling the sprocket 4, rotate the sprocket 4 to align the first through hole 203 and the second through hole 401, and then insert the connecting rod 5 to realize the connection between the connecting end 202 and the sprocket 4, avoiding the sprocket 4 from detaching from the connecting end 202. This assembly method is simple and convenient, improving the assembly efficiency, and is also convenient for replacement when the sprocket 4 is damaged.

[0033] By setting the transmission shaft 2 to conduct the rotational force provided by the driving member 1 to the sprocket 4, the direct connection between the driving member 1 and the sprocket 4 is avoided, the bending moment borne by the driving member 1 is reduced, and the service life of the driving member 1 is prolonged.

[0034] Further, as Figure 1 shown, the upper end of the sleeve 3 is fixedly connected to the driving member 1. Optionally, the driving member 1 is a driving member. The driving member 1 is provided with an output end 101, and the driving member 1 provides a driving force to rotate the output end 101. The output end 101 extends into the connection groove 201 provided at the upper end of the transmission shaft 2. Combining Figure 6 shown, the output end 101 is spline-connected to the transmission shaft 2, and the driving member 1 drives the transmission shaft 2 to rotate through the output end 101.

[0035] Further, as Figure 1 and Figure 4 shown, a first limiting step 301 is provided at one end of the sleeve 3 close to the driving member 1. A first bearing 6 is provided on the first limiting step 301. The first bearing 6 is placed on the first limiting step 301. The transmission shaft 2 is connected to the sleeve 3 through the first bearing 6. A limiting edge 204 is provided at the upper end of the transmission shaft 2. By abutting the limiting edge 204 against the first bearing 6, the transmission shaft 2 is prevented from falling off the driving member 1.

[0036] Further, as Figure 4 shown, a third limiting step 303 is provided below the first limiting step 301. A first sealing ring 11 is provided between the third limiting step 303 and the first bearing 6. The first sealing ring 11 can prevent the lubricating oil from leaking out.

[0037] Further, as Figure 1 shown, a second bearing 7 is provided at one end of the sleeve 3 close to the sprocket 4. The transmission shaft 2 is sleeved in the second bearing 7, and the rotation stability of the transmission shaft 2 is further improved through the second bearing 7.

[0038] Further, a second limiting step 302 is provided at one end of the sleeve 3 close to the sprocket 4. A limiting ring 8 is provided below the second limiting step 302. A sleeve cover plate 9 is provided at the bottom end of the sleeve 3. The sleeve cover plate 9 prevents ballast from flying into the inside of the sleeve 3 and protects the transmission shaft 2. The limiting ring 8 is placed on the sleeve cover plate 9. A second bearing 7 is provided between the limiting ring 8 and the second limiting step 302. The transmission shaft 2 is connected to the sleeve 3 through the second bearing 7, and the rotation stability of the transmission shaft 2 is further ensured through the second bearing 7.

[0039] In some embodiments, as Figure 5As shown, a second sealing ring 12 is also provided between the limiting ring 8 and the sleeve 3. The outer surface of the limiting ring 8 abuts against the inner ring surface of the second sealing ring 12. The second sealing ring 12 can prevent the movement of the limiting ring 8, and at the same time, the second sealing ring 12 can also prevent the lubricating oil from leaking out.

[0040] Further, as Figure 1 and Figure 3 shown, a plurality of oil injection holes 10 are provided on the side wall of the sleeve 3. Lubricating oil is injected through the oil injection holes 10 to ensure the lubrication between components and reduce friction.

[0041] Further, as Figure 1 shown, a wear-resistant block 13 is provided in the middle of the end face of the sprocket 4. The end face of the connecting end 202 does not extend beyond the end face of the wear-resistant block 13. During the process of cleaning ballast, the hardness of the ballast is relatively large, which will wear the sprocket 4. By providing the wear-resistant block 13, the service life of the sprocket 4 can be increased.

[0042] Further, as Figure 2 shown, a fixing plate 14 and two connecting members 15 are provided on the outer side surface of the sleeve 3. The two connecting members 15 are arranged oppositely on both sides of the sleeve 3. The connecting member 15 includes a first connecting plate 1501 and a second connecting plate 1502. The two second connecting plates 1502 are arranged in parallel. The first connecting plate 1501 is fixedly connected to the two second connecting plates 1502. The first connecting plate 1501 is used to connect to the column of the excavating mechanism, and is connected to the excavating beam of the excavating mechanism through the fixing plate 14, so that the sprocket drive mechanism of the present invention is fixedly connected to the excavating mechanism.

[0043] During the assembly of this embodiment, the second bearing 7, the second sealing ring 12 and the limiting ring 8 are sequentially placed into the sleeve 3, and then the sleeve cover plate 9 is installed by bolts. Then, the first sealing ring 11 and the first bearing 6 are sequentially placed into the sleeve 3. After the transmission shaft 2 passes through the first bearing 6 and the second bearing 7, the driving member 1 is installed on the sleeve 3, and the output end 101 is connected to the connecting groove 201. Finally, the sprocket 4 is installed and the first through hole 203 and the second through hole 401 are kept aligned, and then the connecting rod 5 is inserted to connect the sprocket 4 and the connecting end 202 to prevent the sprocket 4 from slipping, thus completing the assembly.

[0044] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sprocket drive mechanism for a ballast screening machine, characterized in that, It includes a sleeve (3), at the upper end of the sleeve (3) there is a driving member (1), inside the sleeve (3), the driving member (1) is connected with a transmission shaft (2), at one end of the transmission shaft (2) far from the driving member (1) there is a connection end (202), the connection end (202) is connected with a sprocket (4), on the connection end (202) there is a radial first through hole (203), on the sprocket (4) there is a second through hole (401) passing through the center of the circle, inside the first through hole (203) and the second through hole (401) there is a connecting rod (5), the connection end (202) and the sprocket (4) are connected through the connecting rod (5).

2. The sprocket drive mechanism of a ballast screening machine according to claim 1, characterized in that, The driving member (1) is provided with an output end (101), in the middle of one end of the transmission shaft (2) close to the driving member (1) there is a connection groove (201), and the output end (101) is located inside the connection groove (201).

3. The sprocket drive mechanism of a ballast screening machine according to claim 1, characterized in that Inside the sleeve (3), at one end close to the driving member (1) there is a first limiting step (301), on the first limiting step (301) there is a first bearing (6), and the transmission shaft (2) is connected with the sleeve (3) through the first bearing (6).

4. The sprocket drive mechanism of a ballast screening machine according to claim 3, characterized in that, Below the first limiting step (301) there is a third limiting step (303), and between the third limiting step (303) and the first bearing (6) there is a first sealing ring (11).

5. The sprocket drive mechanism of a ballast screening machine according to claim 1, characterized in that, Inside the sleeve (3), at one end close to the sprocket (4) there is a second limiting step (302), below the second limiting step (302) there is a limiting ring (8), between the limiting ring (8) and the second limiting step (302) there is a second bearing (7), and the transmission shaft (2) is connected with the sleeve (3) through the second bearing (7).

6. The sprocket drive mechanism of a ballast screening machine according to claim 1, characterized in that On the circumferential side of the sleeve (3) there are several oil injection holes (10).

7. The sprocket drive mechanism of a ballast screening machine according to claim 1, characterized in that, In the middle of the end face of the sprocket (4) there is a wear-resistant block (13), and the end face of the connection end (202) does not extend beyond the end face of the wear-resistant block (13).

8. The sprocket drive mechanism of a ballast screening machine according to claim 1, characterized in that, On the outer periphery of the sleeve (3) there is a fixing plate (14) and several connecting pieces (15), and the fixing plate (14) and the several connecting pieces (15) are used for connecting with external fixed points.

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