Driven chain wheel assembly and excavating chain scraper

Abstract

The invention discloses a driven chain wheel assembly and an excavating chain scraper, and belongs to the technical field of railway construction. The driven chain wheel assembly comprises a mounting seat, a bearing cover, a driven chain wheel, a bearing, a driven chain wheel shaft and a driven shaft sleeve; the driven chain wheel shaft is arranged in the mounting seat, and the top of the driven chain wheel shaft is non-circular; one end of the driven shaft sleeve abuts against the mounting seat, and the other end of the driven shaft sleeve abuts against the driven chain wheel shaft; the bearings are oppositely arranged at the two ends of the peripheral side of the driven shaft sleeve. The bearing cover is arranged at the end, abutting against the driven chain wheel shaft, of the driven shaft sleeve and fixed to the installation base through a fixing piece. The driven chain wheel is arranged on the peripheral side of the bearing, and when the driven chain wheel rotates, the installation base, the bearing cover, the driven chain wheel shaft and the driven shaft sleeve are kept relatively static. The driven chain wheel assembly provided by the invention is simple in structure, convenient to disassemble, safe and reliable, and the mounting seat, the bearing cover, the driven chain wheel shaft and the driven shaft sleeve are relatively static so as to ensure that the bearing does not axially move.

Description

Technical Field

[0001] The invention belongs to the technical field of railway construction, and in particular relates to a driven sprocket assembly and an excavator chain-stripping machine. Background Art

[0002] The excavator chain machine is mainly composed of an excavation mechanism, a ballast discharge mechanism, a slewing mechanism, an outer cover and a quick-change connector. The excavation mechanism is used to excavate the ballast at the bottom of the pillow. The excavation mechanism cuts into the bottom of the pillow from one side of the line through the slewing mechanism in a side-cut manner. The excavated ballast is backfilled into the pre-dug trench on the slope through the ballast discharge mechanism. The excavation mechanism consists of a driving sprocket, a driven sprocket, an excavation chain and a hydraulic motor. The driving sprocket is driven by the hydraulic motor to rotate, which in turn drives the excavation chain to rotate and remove the ballast at the bottom of the pillow.

[0003] The driven sprocket assembly of the existing excavator chain scraper welds the bearing cover and the driven sprocket together, turning the driven wheel assembly into an inseparable whole. If the internal bearing of the driven sprocket assembly is damaged, the bearing cannot be replaced and the entire driven sprocket assembly can only be replaced, which results in high maintenance costs. At the same time, the bearing of the existing driven sprocket assembly may move axially during use, posing a safety hazard. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a driven sprocket assembly and an excavator chain puller with simple structure, convenient disassembly, safety and reliability. The mounting seat, bearing cover, driven sprocket shaft and driven shaft sleeve are relatively stationary to ensure that the bearing does not move axially.

[0005] The present invention provides the following technical solutions: In the first aspect, a driven sprocket assembly is provided, including a mounting seat, a bearing cover, a driven sprocket, a bearing, a driven sprocket shaft and a driven shaft sleeve; the driven sprocket shaft is arranged in the mounting seat, and the top of the driven sprocket shaft is non-circular; the driven shaft sleeve is arranged on the peripheral side of the driven sprocket shaft, one end of the driven shaft sleeve abuts the mounting seat, and the other end abuts the driven sprocket shaft; the bearing is relatively arranged at two ends of the outer peripheral side of the driven shaft sleeve; the bearing cover is arranged at one end of the driven shaft sleeve abutting the driven sprocket shaft, and is fixed to the mounting seat by a fixing member; the bearing cover and the driven shaft sleeve are both provided with fixing holes for cooperating with the fixing member to fix the bearing cover or the driven shaft sleeve during the disassembly or installation process of the driven sprocket assembly; the driven sprocket is arranged on the outer peripheral side of the bearing, and when the driven sprocket rotates, the mounting seat, the bearing cover, the driven sprocket shaft and the driven shaft sleeve remain relatively stationary.

[0006] As an optional technical solution of the present invention, a sealing cover for sealing the bearing is provided between the driven sprocket and the driven shaft sleeve, and the sealing cover is located at one end away from the bearing cover.

[0007] As an optional technical solution of the present invention, a hollow cavity is opened on the top of the driven sprocket shaft, an oil cup is arranged in the hollow cavity, and the opening of the hollow cavity is sealed by a screw plug.

[0008] As an optional technical solution of the present invention, the bearing cover is threadedly connected to the driven shaft sleeve through a screw hole to abut one end of the driven sprocket shaft, and is fixed to the mounting seat by a screw; the bearing cover is provided with a screw fixing groove that cooperates with the screw, and the threaded groove does not penetrate the bearing cover.

[0009] As an optional technical solution of the present invention, a retaining ring is provided at the position of the screw used for fixing on the mounting seat to prevent the screw from moving upward.

[0010] As an optional technical solution of the present invention, the bearing is a tapered roller bearing.

[0011] As an optional technical solution of the present invention, a round nut is provided in the mounting seat, and the round nuts are located on both sides of the bottom of the driven sprocket shaft for adjusting the gap between the mounting seat and the driven shaft sleeve.

[0012] As an optional technical solution of the present invention, a stop washer is provided at the bottom of the driven sprocket shaft, and the stop washer is located on the side of the round nut close to the driven shaft sleeve to prevent the round nut from loosening.

[0013] In a second aspect, an excavator chain picker is provided, comprising an excavating mechanism; the excavating mechanism is equipped with the driven sprocket assembly described in the first aspect.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The driven sprocket assembly provided by the present invention has a simple structure, is easy to disassemble, safe and reliable, and is connected to the mounting seat and the bearing cover by a fixing piece, and the bearing cover is stationary relative to the mounting seat; the driven sprocket shaft is in direct contact with the driven shaft sleeve, and there is friction between the two, thereby ensuring that the driven sprocket shaft is stationary relative to the driven shaft sleeve; by setting the top of the driven sprocket shaft to be non-circular, the driven sprocket shaft is prevented from rotating relative to the mounting seat, so the mounting seat, the bearing cover, the driven sprocket shaft and the driven shaft sleeve are relatively stationary to ensure that the bearing does not move axially. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a top view of a driven sprocket assembly in an embodiment of the present invention; Figure 2 yes Figure 1 Side cross-sectional view at AA; Figure 3 yes Figure 2 The enlarged image at point I in the middle; Figure 4 is a schematic structural diagram of a bearing cover in an embodiment of the present invention; Figure 5 Schematic diagram of the structure of the driven shaft sleeve in an embodiment of the present invention.

[0016] The markings in the figure are: 1. Mounting seat; 2. Oil cup; 3. Screw plug; 4. Screw hole; 5. Bearing cover; 5.1. Bearing cover fixing hole; 5.2. Screw fixing groove; 6. Screw; 7. Retaining ring; 8. Driven sprocket; 9. Bearing; 10. Round nut; 11. Driven sprocket shaft; 12. Stop washer; 13. Driven shaft sleeve; 13.1. Driven shaft sleeve fixing hole; 14. Sealing cover. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0018] Example 1 This embodiment provides a driven sprocket assembly, such as Figure 1 and 2 As shown, it includes a mounting seat 1, a bearing cover 5, a driven sprocket 8, a bearing 9, a driven sprocket shaft 11 and a driven shaft sleeve 13.

[0019] The driven sprocket shaft 11 is arranged in the mounting seat 1. Figure 1 As shown, the top of the driven sprocket shaft 11 is non-circular, which effectively prevents the driven sprocket shaft 11 from rotating relative to the mounting seat 1.

[0020] Furthermore, a hollow cavity is provided at the top of the driven sprocket shaft 11 , an oil cup 2 is provided in the hollow cavity, and the opening of the hollow cavity is sealed by a screw plug 3 . The oil cup 2 is used to inject oil into the driven sprocket shaft 11 .

[0021] The driven shaft sleeve 13 is disposed on the circumferential side of the driven sprocket shaft 11 , and one end of the driven shaft sleeve 13 abuts against the mounting seat 1 , and the other end abuts against the driven sprocket shaft 11 .

[0022] Furthermore, a round nut 10 is provided in the mounting seat 1 and is located on both sides of the bottom of the driven sprocket shaft 11 for adjusting the gap between the mounting seat 1 and the driven shaft sleeve 13 , thereby increasing the friction between the mounting seat 1 and the driven shaft sleeve 13 .

[0023] Furthermore, a stop washer 12 is provided at the bottom of the driven sprocket shaft 11 , and the stop washer 12 is located on a side of the round nut 10 close to the driven shaft sleeve 13 , so as to prevent the round nut 10 from loosening.

[0024] The bearings 9 are relatively arranged at two ends of the outer circumference of the driven sleeve 13. In this embodiment, the bearings 9 are tapered roller bearings.

[0025] The bearing cap 5 is arranged at one end of the driven shaft sleeve 13 that contacts the driven sprocket shaft 11, and is fixed to the mounting seat 1 through a fixing member. The bearing cap 5 and the driven shaft sleeve 13 are both provided with fixing holes for cooperating with the fixing member to fix the bearing cap 5 or the driven shaft sleeve 13 during the disassembly or installation process of the driven sprocket assembly.

[0026] In this embodiment, Figure 4 As shown, the bearing cover 5 is threadedly connected to the driven shaft sleeve 13 through the screw hole 4 to contact one end of the driven sprocket shaft 11, and is fixed to the mounting seat 1 through the screw 6. The bearing cover 5 is provided with a screw fixing groove 5.2 that matches the screw 6, and the thread groove 5.2 does not penetrate the bearing cover 5 to prevent the screw 6 from falling off.

[0027] Furthermore, in this embodiment, the screw fixing groove 5.2 on the bearing cover 5 adopts a right-hand thread. Since the chain of the excavator chain puller basically rotates in the counterclockwise direction, if the inner ring of the bearing 9 rotates driven by the outer ring of the bearing 9, and then drives the driven shaft sleeve 13 to rotate, the bearing cover 5 will also move downward, that is, the bearing cover 5 is tighter than the driven shaft sleeve 13.

[0028] In this embodiment, Figure 4 and Figure 5 As shown, the bearing cover fixing hole 5.1 and the driven shaft sleeve fixing hole 13.1 are used to fix the bearing cover 5 and the driven shaft sleeve 13 during the installation or disassembly process of the driven sprocket assembly through the cylinder that cooperates with the bearing cover fixing hole 5.1 and the driven shaft sleeve fixing hole 13.1 to prevent them from rotating and facilitate disassembly and assembly.

[0029] like Figure 3 As shown, a retaining ring 7 is provided at the position of the screw 6 used for fixing on the mounting seat 1 to prevent the screw 6 from moving upward.

[0030] The driven sprocket 8 is arranged on the outer peripheral side of the bearing 9. When the driven sprocket 8 rotates, the mounting seat 1, the bearing cover 5, the driven sprocket shaft 11 and the driven shaft sleeve 13 remain relatively stationary.

[0031] Furthermore, a sealing cover 14 for sealing the bearing 9 is provided between the driven sprocket 8 and the driven shaft sleeve 13 , and the sealing cover 14 is located at an end away from the bearing cover 5 .

[0032] In this embodiment, the mounting seat 1 and the bearing cover 5 are connected by screws 6, and the bearing cover 5 is stationary relative to the mounting seat 1. The driven sprocket shaft 11 is in direct contact with the driven shaft sleeve 13, and there is friction between the two, which ensures that the driven sprocket shaft 11 is stationary relative to the driven shaft sleeve 13. By setting the top of the driven sprocket shaft 11 to be non-circular, the driven sprocket shaft 11 is prevented from rotating relative to the mounting seat 1, so the mounting seat 1, the bearing cover 5, the driven sprocket shaft 11, and the driven shaft sleeve 13 are relatively stationary, so as to ensure that the bearing 9 does not move axially.

[0033] Example 2 This embodiment provides an excavator chain machine based on the first embodiment.

[0034] It comprises an excavating mechanism, on which the driven sprocket assembly described in Example 1 is assembled.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A driven sprocket assembly, characterized in that: It comprises a mounting seat (1), a bearing cover (5), a driven sprocket (8), a bearing (9), a driven sprocket shaft (11) and a driven shaft sleeve (13); The driven sprocket shaft (11) is arranged in the mounting seat (1), and the top of the driven sprocket shaft (11) is non-circular; The driven shaft sleeve (13) is arranged on the circumferential side of the driven sprocket shaft (11), one end of the driven shaft sleeve (13) abuts against the mounting seat (1), and the other end abuts against the driven sprocket shaft (11); the bearing (9) is relatively arranged at two ends of the outer circumferential side of the driven shaft sleeve (13); the bearing cover (5) is arranged at one end of the driven shaft sleeve (13) abutting against the driven sprocket shaft (11), and is fixed to the mounting seat (1) by a fixing member; the bearing cover (5) and the driven shaft sleeve (13) are both provided with fixing holes for cooperating with the fixing member to fix the bearing cover (5) or the driven shaft sleeve (13) during the disassembly or installation process of the driven sprocket assembly; The driven sprocket (8) is arranged on the outer peripheral side of the bearing (9), and when the driven sprocket (8) rotates, the mounting seat (1), the bearing cover (5), the driven sprocket shaft (11) and the driven shaft sleeve (13) remain relatively stationary.

2. The driven sprocket assembly according to claim 1, characterized in that: A sealing cover (14) for sealing the bearing (9) is provided between the driven sprocket (8) and the driven shaft sleeve (13), and the sealing cover (14) is located at an end away from the bearing cover (5).

3. The driven sprocket assembly according to claim 1, characterized in that: A hollow cavity is provided at the top of the driven sprocket shaft (11), an oil cup (2) is provided in the hollow cavity, and the opening of the hollow cavity is sealed by a screw plug (3).

4. The driven sprocket assembly according to claim 1, characterized in that: The bearing cover (5) is threadedly connected to the driven shaft sleeve (13) through the screw hole (4) to contact one end of the driven sprocket shaft (11), and is fixed to the mounting seat (1) through the screw hole (4); The bearing cover (5) is provided with a screw fixing groove (5.2) that cooperates with the screw (6), and the thread groove (5.2) does not penetrate the bearing cover (5).

5. The driven sprocket assembly according to claim 4, characterized in that: A retaining ring (7) is provided at the position of the screw (6) used for fixing on the mounting seat (1) to prevent the screw (6) from moving upward.

6. The driven sprocket assembly according to claim 1, characterized in that: The bearing (9) is a tapered roller bearing.

7. The driven sprocket assembly according to claim 1, characterized in that: A round nut (10) is provided in the mounting seat (1), and the round nuts (10) are located on both sides of the bottom of the driven sprocket shaft (11) and are used to adjust the gap between the mounting seat (1) and the driven shaft sleeve (13).

8. The driven sprocket assembly according to claim 7, characterized in that: A stop washer (12) is provided at the bottom of the driven sprocket shaft (11), and the stop washer (12) is located on a side of the round nut (10) close to the driven shaft sleeve (13) to prevent the round nut (10) from loosening.

9. An excavator chain picker, characterized in that: Includes excavation agencies; The excavating mechanism is equipped with a driven sprocket assembly according to any one of claims 1 to 8.

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