Driven chain wheel assembly for railway ballast screening machine

Abstract

The driven chain wheel assembly comprises a support, a driven shaft and a driven chain wheel, the support comprises a first supporting plate and a second supporting plate which are arranged in parallel, and the driven shaft is connected with the same end of the first supporting plate and the same end of the second supporting plate. The driven chain wheel is located between the first supporting plate and the second supporting plate and connected with the driven shaft through a bearing, the driven chain wheel is provided with a first shaft seat and a second shaft seat on the outer sides of the first supporting plate and the second supporting plate respectively, a flat key is arranged on the driven shaft, the driven shaft is connected with the bearing through the flat key, and one end of the flat key is connected with the first shaft seat in a clamped mode. And the other end of the flat key is propped against the second shaft seat. One end of the flat key abuts against the second shaft seat, and the other end of the flat key is clamped with the first shaft seat, so that the driven shaft can be pulled out from the single side in the support, the problem that the whole driven chain wheel assembly needs to be disassembled when the driven chain wheel is replaced is solved, the workload is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transit construction equipment, and particularly relates to a driven sprocket assembly for a ballast screening machine. Background Art

[0002] The ballast screening machine plays an important role in railway maintenance, including a digging mechanism and a ballast lifting mechanism. The digging mechanism digs out the dirty ballast on the railway bed, and the ballast lifting mechanism lifts the dug ballast to a certain height and conveys it to a designated position for subsequent processing.

[0003] A driving sprocket assembly and a driven sprocket assembly are arranged in the ballast lifting mechanism. The driving sprocket assembly and the driven sprocket assembly are respectively located at two ends of the ballast lifting mechanism, and the power transmission and the chain guiding are realized through the meshing action of the chain. During the operation of the ballast lifting mechanism, the sprocket on the driven sprocket is prone to damage, and the replacement period is 3 to 6 months. During the replacement of the driven sprocket, the whole driven sprocket assembly needs to be removed for replacement. There are many parts to be removed, the procedures are cumbersome, the workload is large, and the efficiency is low. Summary of the Invention

[0004] The purpose of the utility model is to provide a driven sprocket assembly for a ballast screening machine aiming at the problems existing in the prior art. The utility model solves the problem that the whole driven sprocket assembly needs to be removed when replacing the sprocket, and improves the work efficiency.

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

[0006] A driven sprocket assembly for a ballast screening machine, comprising a bracket, a driven shaft and a driven sprocket. The bracket comprises a first support plate and a second support plate arranged in parallel. The driven sprocket is located between the first support plate and the second support plate and is connected with the driven shaft through a bearing. A first shaft seat is arranged on the outer side of the first support plate of the driven shaft, and a second shaft seat is arranged on the outer side of the second support plate of the driven shaft. A flat key is arranged on the driven shaft, and the driven shaft is connected with the bearing, the first support plate, the second support plate and the first shaft seat through the flat key.

[0007] In the above scheme, by arranging the flat key in the driven shaft, and connecting the flat key with the bearing, the first support plate, the second support plate and the first shaft seat, the driven shaft can be drawn out from the side of the bracket, thereby facilitating the replacement of the driven sprocket, avoiding the problem of disassembling the whole structure of the driven sprocket assembly when replacing the driven sprocket, reducing the workload and improving the work efficiency.

[0008] Further, a first spacer sleeve is provided between the first shaft seat and the first support plate, and a second spacer sleeve is provided between the second shaft seat and the second support plate. One end of the flat key passes through the second support plate and abuts against the end face of the second spacer sleeve, and the other end of the flat key passes through the first support plate, the first spacer sleeve and is clamped with the first shaft seat. By means of the first spacer sleeve, direct friction between the first shaft seat and the first support plate is avoided, and by means of the second spacer sleeve, direct friction between the second shaft seat and the second support plate is avoided. By abutting one end of the flat key against the end face of the second spacer sleeve, unilateral axial limit of the driven shaft connected to the flat key is achieved.

[0009] Further, grooves adapted to the flat key are provided on the first support plate, the second support plate and the first shaft seat, and the flat key is located in the groove. By placing the flat key in the groove, rotation of the flat key can be prevented, thereby achieving rotational limit of the driven shaft.

[0010] Further, a first nut is provided on the outer side of the first shaft seat of the driven shaft, and a second nut is provided on the outer side of the second shaft seat of the driven shaft. The first nut abuts against the first shaft seat, and the second nut abuts against the second shaft seat. By the fastening action of the first nut and the second nut, axial movement of the driven shaft during operation is prevented.

[0011] Further, a round nut is provided between the first nut and the first shaft seat. By means of the round nut cooperating with the thrust washer, the connection stability of the driven shaft is enhanced.

[0012] Further, an oil injection port is provided on the driven shaft. Lubricating oil is injected through the oil injection hole to ensure lubrication between components.

[0013] Further, the bracket further includes a connecting plate, the connecting plate is connected to one ends of the first support plate and the second support plate away from the driven shaft, and a screw rod is provided on the connecting plate. By means of the connecting plate, the driven sprocket assembly is fixed in the ballast lifting mechanism.

[0014] Further, connection holes are provided on both the first shaft seat and the second shaft seat. Through the connection holes, the first shaft seat and the second shaft seat are connected to the excavation mechanism, thereby realizing the connection between the ballast lifting mechanism and the excavation mechanism.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] 1. By providing a flat key on the driven shaft, which is connected to the bearing, the first support plate, the second support plate and the first shaft seat, it is realized that the driven shaft can be withdrawn from the side of the bracket, thus facilitating the replacement of the driven sprocket and avoiding the problem of having to disassemble the entire driven sprocket assembly when replacing the driven sprocket, reducing the workload and improving work efficiency.

[0017] 2. The second spacer sleeve avoids direct friction between the second shaft seat and the second support plate. One end of the flat key abuts against the end face of the second spacer sleeve, thereby realizing the axial limit of the driven shaft connected to the flat key on the side of the second shaft seat.

[0018] 3. By providing the fastening effect of the first nut and the round nut, the axial limit of the driven shaft on the side of the first shaft seat is ensured. Description of the Drawings

[0019] Figure 1 It is a cross-sectional view of a driven sprocket assembly for a ballast screening machine according to the present invention;

[0020] Figure 2 It is an installation schematic diagram of a driven sprocket assembly for a ballast screening machine according to the present invention;

[0021] Figure 3 It is a structural schematic diagram of a bracket of a driven sprocket assembly for a ballast screening machine according to the present invention;

[0022] Figure 4 It is a structural schematic diagram of the first shaft seat (second shaft seat) of a bracket of a driven sprocket assembly for a ballast screening machine according to the present invention;

[0023] Figure 5 It is a structural schematic diagram of a ballast lifting mechanism of a driven sprocket assembly for a ballast screening machine according to the present invention.

[0024] In the figure: 1, bracket; 101, first support plate; 102, second support plate; 103, connecting plate; 2, driven shaft; 3, driven sprocket; 4, first spacer sleeve; 5, second spacer sleeve; 6, first shaft seat; 7, second shaft seat; 8, flat key; 9, oil filling port; 10, first nut; 11, second nut; 12, round nut; 13, groove; 14, screw; 15, bearing; 16, suspension connecting plate; 17, ballast lifting mechanism outer bracket; 18, suspension; 19, connecting hole; 20, oil outlet. Detailed Embodiments

[0025] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings of 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 of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying 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, and therefore should not be construed as a limitation to the present utility model.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" 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 situations.

[0028] The following is combined with Figures 1 to 5 , and through specific embodiments and their application scenarios, a driven sprocket assembly for a ballast screening machine provided by the embodiments of the present utility model will be described in detail.

[0029] A driven sprocket assembly for a ballast screening machine includes a bracket 1, a driven shaft 2, and a driven sprocket 3. The bracket 1 includes a first support plate 101 and a second support plate 102 arranged in parallel. The driven sprocket 3 is located between the first support plate 101 and the second support plate 102 and is connected to the driven shaft 2 through a bearing 15. The driven shaft 2 is provided with a first shaft seat 6 on the outside of the first support plate 101, and the driven shaft 2 is provided with a second shaft seat 7 on the outside of the second support plate 102. A flat key 8 is arranged on the driven shaft 2, and the driven shaft 2 is connected to the bearing 15, the first support plate 101, the second support plate 102, and the first shaft seat 6 through the flat key 8.

[0030] In the present utility model, by arranging a flat key 8 on the driven shaft 2, and the flat key 8 is connected to the bearing 15, the first support plate 101, the second support plate 102, and the first shaft seat 6, it is realized that the driven shaft 2 can be drawn out from the side of the bracket, thus avoiding the problem of having to disassemble the entire driven sprocket assembly when replacing the driven sprocket 3, reducing the workload and improving the work efficiency.

[0031] Specifically, as Figure 1 shown, the bracket 1 further includes a connecting plate 103. The connecting plate 103 is connected to one ends of the first support plate 101 and the second support plate 102 away from the driven shaft 2. A screw 14 is provided on the connecting plate 103. The same ends of the first support plate 101 and the second support plate 102 are bolt - connected to the connecting plate 103, and the screw 14 is thread - connected to the connecting plate 103. Combining Figure 2 shown, the connecting plate 103 is connected to the outside bracket 17 of the ballast lifting mechanism through the screw 14. The driven sprocket assembly in this embodiment is installed in the ballast lifting mechanism through the connecting plate 103. At the same time, the connection by the screw 14 facilitates the installation and disassembly of the driven sprocket assembly of this embodiment.

[0032] A keyway is provided on the driven shaft 2, and a flat key 8 is placed in the keyway of the driven shaft 2. The driven shaft 2 is connected to the bearing 15 through the flat key 8. First shaft seats 6 and second shaft seats 7 are provided on both sides of the bracket 1. A first spacer 4 is provided between the first shaft seat 6 and the first support plate 101, and a second spacer 5 is provided between the second shaft seat 7 and the second support plate 102. The inner diameter of the first spacer 4 is larger than that of the second spacer 5. The first spacer 4 and the second spacer 5 prevent the direct friction between the shaft seats. The flat key 8 is placed in the keyway of the driven shaft 2, and part of it protrudes from the side of the driven shaft 2. One end face of the protruding part abuts against the end face of the second spacer 5, and the other end of the protruding part passes through the first spacer 4 and is clamped with the first shaft seat 6. Among them, combining Figure 3 and Figure 4 shown, grooves 13 adapted to the flat key 8 are provided on the first support plate 101, the second support plate 102 and the first shaft seat 6. The flat key 8 is located in the groove 13. The flat key 8 passes through the grooves 13 on the first support plate 101 and the second support plate 102 and is clamped with the first shaft seat 6, thus realizing the rotational limit of the driven shaft 2.

[0033] As Figure 2 and Figure 5 shown, a suspension connecting plate 16 is fixedly connected to the outside of the first shaft seat 6 and the second shaft seat 7. The ballast lifting mechanism is connected to the excavation mechanism through the suspension connecting plate 16. Among them, combining Figure 4 shown, connection holes 19 are provided on both the first shaft seat 6 and the second shaft seat 7. The connection holes 19 facilitate the bolt - connection with the suspension connecting plate 16.

[0034] As Figure 1As shown, a first nut 10 is provided on the outer side of the driven shaft 2 at the first shaft seat 6, and a second nut 11 is provided on the outer side of the driven shaft 2 at the second shaft seat 7. The first nut 10 abuts against the first shaft seat 6, and the second nut 11 abuts against the second shaft seat 7. A round nut 12 is provided between the first nut 10 and the first shaft seat 6, and the round nut 12 cooperates with a thrust washer to improve the connection stability of the driven shaft 2. Through the fastening action of the first nut 10 and the second nut 11, axial limitation of the driven shaft 2 is achieved, avoiding movement of the driven shaft 2 during operation. An oil filling port 9 is also provided on the driven shaft 2. The port of the oil filling port 9 is located at one end of the first nut 10, and a grease nipple is connected to the port. Lubricating oil is injected into the oil filling port 9 through the grease nipple, and the lubricating oil enters the bearing 15 through the oil outlet 20 on the driven shaft 2, reducing friction.

[0035] It should be noted that the excavation mechanism is located on one side of the ballast lifting mechanism. It is inconvenient to extract the driven shaft 2 from this side. At the same time, to ensure axial limitation of the driven shaft 2, the end face of the second spacer 5 is abutted against the end face of one end of the protruding part of the flat key 8, so that the driven shaft 2 cannot be extracted from one side of the second spacer 5. On the other side, to ensure axial limitation during operation, the connection stability is enhanced by setting the round nut 12. When this embodiment is assembled in the ballast lifting mechanism, one side of the second spacer 5 is located on the side close to the excavation mechanism. During disassembly, after removing the chain connected to the driven sprocket 3, the first nut 10, the round nut 12, and the second nut 11 are respectively removed, and then the driven shaft 2 is extracted from one side of the first shaft seat 6, and the driven sprocket 3 can be removed. Using the driven sprocket assembly of the present utility model, on the premise of ensuring axial limitation of the driven shaft 2 during operation, the problem of needing to disassemble the overall structure of the driven sprocket assembly when replacing the driven sprocket 3 is avoided, the workload is reduced, and the work efficiency is improved.

[0036] Although the embodiments of the present utility model 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 utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A driven sprocket assembly for a ballast cleaning machine, comprising a bracket (1), a driven shaft (2) and a driven sprocket (3), characterized in that: The bracket (1) comprises a first support plate (101) and a second support plate (102) which are arranged in parallel; the driven sprocket (3) is located between the first support plate (101) and the second support plate (102) and is connected to the driven shaft (2) via a bearing (15); the driven shaft (2) is provided with a first shaft seat (6) on the outer side of the first support plate (101); the driven shaft (2) is provided with a second shaft seat (7) on the outer side of the second support plate (102); a flat key (8) is provided on the driven shaft (2); and the driven shaft (2) is connected to the bearing (15), the first support plate (101), the second support plate (102) and the first shaft seat (6) via the flat key (8).

2. A driven sprocket assembly for a ballast cleaning machine according to claim 1, characterized in that: A first spacer sleeve (4) is arranged between the first shaft seat (6) and the first support plate (101), a second spacer sleeve (5) is arranged between the second shaft seat (7) and the second support plate (102), one end of the flat key (8) passes through the second support plate (102) and abuts against an end surface of the second spacer sleeve (5), and the other end of the flat key (8) passes through the first support plate (101) and the first spacer sleeve (4) and is clamped with the first shaft seat (6).

3. A driven sprocket assembly for a ballast cleaning machine according to claim 2, characterized in that: The first support plate (101), the second support plate (102) and the first shaft seat (6) are all provided with a groove (13) adapted to the flat key (8), and the flat key (8) is located in the groove (13).

4. The driven sprocket assembly for a ballast cleaning machine according to claim 1, characterized in that: The driven shaft (2) is provided with a first nut (10) on the outside of the first shaft seat (6), and the driven shaft (2) is provided with a second nut (11) on the outside of the second shaft seat (7); the first nut (10) abuts against the first shaft seat (6), and the second nut (11) abuts against the second shaft seat (7).

5. A driven sprocket assembly for a ballast cleaning machine according to claim 4, characterized in that: A round nut (12) is provided between the first nut (10) and the first shaft seat (6).

6. The driven sprocket assembly for a ballast cleaning machine according to claim 1, characterized in that: The driven shaft (2) is provided with an oil filling port (9).

7. The driven sprocket assembly for a ballast cleaning machine according to claim 1, characterized in that: The bracket (1) further comprises a connecting plate (103), wherein the connecting plate (103) is connected to one end of the first supporting plate (101) and the second supporting plate (102) away from the driven shaft (2), and a screw rod (14) is provided on the connecting plate (103).

8. The driven sprocket assembly for a ballast cleaning machine according to claim 1, characterized in that: The first shaft seat (6) and the second shaft seat (7) are both provided with connection holes (19).

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