Screening bucket of excavator

Abstract

The utility model discloses an excavator screening bucket which comprises an excavator bucket body, a discharging port is formed in the bottom of the excavator bucket body, three screening rollers are arranged at the discharging port in the bottom of the excavator bucket body, the two ends of each screening roller are fixedly connected with connecting shafts respectively, and the connecting shafts at the two ends of each screening roller are rotationally connected with the inner walls of the two sides of the excavator bucket body respectively. The two sides of the bucket are fixedly connected with motors respectively, the two motors are in transmission connection with the connecting shafts at the two ends of the same screening roller through chain wheels and chains respectively, and the connecting shafts at the two ends of each screening roller are in transmission connection with the connecting shafts at the two ends of the adjacent screening roller through chain wheels and chains. The positions, where the chain wheel, the chain and the motor are located, of the excavator bucket are fixedly connected with protective shells correspondingly, and the chain wheel, the chain and the motor are located in the protective shells. The two motors are used for driving the three screening rollers to rotate through the chain wheels and the chain, the energy transmission process is shortened, energy consumption is reduced, it is not needed that each screening roller is connected with one motor, and cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of excavator bucket manufacturing and processing, and in particular to an excavator screening bucket. Background Technology

[0002] Generally, screening buckets use a hydraulic system to drive the screening rollers to crush and screen the concrete and gravel in the bucket. Hydraulic drive first converts the electrical energy of the motor into the kinetic energy of the liquid, and the flowing liquid drives the screening rollers to rotate through the hydraulic motor. There are many different structures, and the energy consumption is relatively high because the transmission process is relatively long. Some other types of screening buckets directly drive the screening rollers to rotate with a motor, with each screening roller having its own motor, which is more expensive. Utility Model Content

[0003] The purpose of this invention is to provide a screening bucket for excavators, which has the advantage of reducing energy consumption when driving the screening rollers.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] A screening bucket for an excavator includes a bucket with a discharge port at its bottom. Three screening rollers are installed at the discharge port. Connecting shafts are fixedly connected to both ends of each screening roller. The connecting shafts at both ends of the screening rollers are rotatably connected to the inner walls on both sides of the bucket. Motors are fixedly connected to both sides of the bucket. Two motors are respectively connected to the connecting shafts at both ends of the same screening roller via sprockets and chains. The connecting shafts at both ends of each screening roller are connected to the connecting shafts at both ends of their adjacent screening rollers via sprockets and chains. Protective shells are fixedly connected to the bucket at the locations of the sprockets, chains, and motors, with the sprockets, chains, and motors located inside the protective shells.

[0006] Using the above technical solution, the motor drives the sprocket and chain to rotate. The sprocket and chain drive the screening roller, which is fixedly connected to the connecting shaft, to rotate. The screening roller then drives other screening rollers to rotate through the sprocket and chain to crush and screen the concrete and gravel in the bucket. Using two motors to drive three screening rollers through the sprocket and chain shortens the energy transfer process, thereby reducing energy consumption. It also eliminates the need to connect a motor to each screening roller, thus reducing costs.

[0007] Preferably, the sprocket is connected to the connecting shaft via a flat key. The side wall of the connecting shaft end and the inner wall of the sprocket are provided with keyways. The flat key is embedded in the keyway of the connecting shaft and is slidably connected to the connecting shaft. The sprocket is sleeved on the end of the connecting shaft. The keyway of the sprocket passes through the flat key, and the sprocket is slidably connected to the flat key. A groove is provided on the side wall of the connecting shaft end, and a retaining spring is embedded in the groove.

[0008] Using the above technical solution, the sprocket drives the connecting shaft to rotate through the flat key, which reduces the axial force of the sprocket on the connecting shaft. At the same time, the key connection is easy to process, convenient to install and disassemble, and has good alignment. The snap ring is used to stop the sprocket and prevent it from slipping off the connecting shaft.

[0009] Preferably, the motor output shaft and the sprocket are connected by a spline. The inner wall of the sprocket is provided with a spline groove. The motor output shaft is fixedly connected to an external spline shaft. The sprocket of the motor is sleeved on the motor output shaft. The key teeth of the external spline shaft are embedded in the spline groove of the sprocket. The sprocket slides along the axial direction on the motor output shaft.

[0010] The above technical solution is used to synchronize the axial movement with the sprocket on the connecting shaft. At the same time, the spline connection has uniform force, high load-bearing capacity, and good centering and guiding properties.

[0011] Preferably, the protective shells on both sides of the bucket are provided with inspection ports, and the inspection ports are provided with sealing plates, which are fixedly connected to the protective shells by bolts and nuts.

[0012] The above technical solution facilitates the maintenance of the drive system inside the protective shell.

[0013] Preferably, the outer wall of the bucket is fixedly connected with a wear-resistant plate.

[0014] By adopting the above technical solution, damage to the excavator bucket during operation can be reduced.

[0015] Preferably, the front part of the bucket has a side blade integrally formed.

[0016] By adopting the above technical solution, the pressure on the ground is increased, allowing for better excavation. Attached Figure Description

[0017] Figure 1 This is an overall schematic diagram of the embodiment;

[0018] Figure 2 This is a schematic diagram showing the connection between the three screening rollers;

[0019] Figure 3 This is a schematic diagram showing the connection between the motor and the screening roller;

[0020] Figure 4 This is a schematic diagram showing the connection between the sprocket and the connecting shaft;

[0021] Figure 5 This is an enlarged view of point A;

[0022] Figure 6 This is a cross-sectional view of the screen roller along its axial direction;

[0023] Figure 7 This is an enlarged view of point B;

[0024] Figure 8 This is a schematic diagram showing the connection between the motor and the sprocket.

[0025] Reference numerals: 1. Bucket; 2. Screening roller; 3. Connecting shaft; 4. Motor; 5. Sprocket; 6. Chain; 7. Protective shell; 8. Flat key; 9. Keyway; 10. Snap ring; 11. External spline shaft; 12. Sealing plate; 13. Wear-resistant plate; 14. Side blade. Detailed Implementation

[0026] The following description is merely a preferred embodiment of this utility model, and the scope of protection is not limited to this embodiment. All technical solutions falling within the scope of this utility model should be considered within the protection scope of this utility model. It should also be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

[0027] See Figures 1 to 8A screening bucket for an excavator includes a bucket 1, with a wear-resistant plate 13 fixedly connected to the outer wall of the bucket 1. A side blade 14 is integrally formed at the front of the bucket 1. A discharge port is provided at the bottom of the bucket 1. Three screening rollers 2 are arranged at the discharge port at the bottom of the bucket 1. Connecting shafts 3 are fixedly connected to both ends of each screening roller 2. The connecting shafts 3 at both ends of the screening roller 2 are rotatably connected to the inner walls on both sides of the bucket 1. A keyway 9 is provided on the side wall of the end of the connecting shaft 3, and a flat key 8 is embedded in the keyway 9. The flat key 8 is connected to the connecting shaft 3. Shaft 3 is slidably connected. A sprocket 5 is fitted at the end of shaft 3. There are two sprockets 5 on shaft 3, connected by a bushing. The rotation axes of the two sprockets 5 coincide with the central axis of the bushing. A keyway 9 is provided on the inner wall of sprocket 5, passing through a flat key 8. Sprocket 5 and flat key 8 are slidably connected. A groove is provided on the side wall of the end of shaft 3, and a retaining spring 10 is embedded in the groove. Motors 4 are fixedly connected to both sides of bucket 1. The output shaft of motor 4 is fixedly connected to an external spline shaft 11. A set of sprockets 5 is provided. The inner wall of the sprocket 5 on the motor 4 has a spline groove 9. The key teeth of the outer spline shaft 11 are embedded in the spline groove 9 of the sprocket 5. The sprocket 5 slides axially on the output shaft of the motor 4. The two motors 4 are respectively connected to the connecting shaft 3 at the end of the same screening roller 2 through the sprocket 5 and chain 6. The connecting shaft 3 at both ends of each screening roller 2 is connected to the connecting shaft 3 at both ends of its adjacent screening roller 2 through the sprocket 5 and chain 6. For example, the sprocket 5 on the motor 4 on one side of the bucket 1 is connected to the connecting shaft 3 at the end of the same screening roller 2. One sprocket 5 on one side of the connecting shaft 3 is connected by a chain 6. Another sprocket 5 on the connecting shaft 3 is connected by a chain 6 to one of the sprockets 5 on another connecting shaft 3 adjacent to this connecting shaft 3. The bucket 1 is fixedly connected to a protective shell 7 at the location of the sprocket 5, chain 6 and motor 4. The sprocket 5, chain 6 and motor 4 are located inside the protective shell 7. Inspection ports are opened on both sides of the protective shell 7. A sealing plate 12 is provided at the inspection port. The sealing plate 12 is fixedly connected to the protective shell 7 by bolts and nuts.

[0028] Working principle: Motor 4 drives sprocket 5 and chain 6 to rotate via splines. Sprocket 5 and chain 6 drive screening roller 2, which is fixed to the connecting shaft 3, to rotate via connecting shaft 3. Screening roller 2 then drives other screening rollers 2 to rotate via sprocket 5 and chain 6 to crush and screen the concrete and gravel in bucket 1. Using two motors 4 to drive three screening rollers 2 via sprocket 5 and chain 6 shortens the energy transfer process compared to hydraulic drive, thereby reducing energy consumption. It also eliminates the need to connect a motor 4 to each screening roller 2, reducing costs.

Claims

1. A screening bucket of a excavator, comprising a bucket (1), the bottom of the bucket (1) is provided with a discharge port, three screening rollers (2) are arranged at the bottom discharge port of the bucket (1), the two ends of the screening roller (2) are fixedly connected with a connecting shaft (3), and the connecting shaft (3) at the two ends of the screening roller (2) is rotatably connected with the inner wall on the two sides of the bucket (1), characterized in that, The digging bucket (1) is fixedly connected with a motor (4) on each side, the two motors (4) are respectively connected with the connecting shaft (3) at the end of the same screening roller (2) through a chain wheel (5) and a chain (6), the connecting shaft (3) at the two ends of each screening roller (2) is connected with the connecting shaft (3) at the two ends of the adjacent screening roller (2) through the chain wheel (5) and the chain (6), the digging bucket (1) is fixedly connected with a protective shell (7) at the position of the chain wheel (5), the chain (6) and the motor (4), and the chain wheel (5), the chain (6) and the motor (4) are located in the protective shell (7).

2. A dragline sifting bucket as claimed in claim 1, characterised in that, The chain wheel (5) is connected with the connecting shaft (3) through a flat key (8), the side wall of the end of the connecting shaft (3) and the inner wall of the chain wheel (5) are provided with a key groove (9), the flat key (8) is embedded in the key groove (9) of the connecting shaft (3) and is connected with the connecting shaft (3) in a sliding mode, the chain wheel (5) is sleeved on the end of the connecting shaft (3), the key groove (9) of the chain wheel (5) passes through the flat key (8), and the chain wheel (5) is connected with the flat key (8) in a sliding mode, the end of the connecting shaft (3) is provided with a groove, and the groove is embedded with a clamping spring (10).

3. A dragline sifting bucket as claimed in claim 1 wherein, The output shaft of the motor (4) is connected with the chain wheel (5) through a spline, the inner wall of the chain wheel (5) is provided with a spline groove (9), the output shaft of the motor (4) is fixedly connected with an outer spline shaft (11), the chain wheel (5) of the motor (4) is sleeved on the output shaft of the motor (4), the spline teeth of the outer spline shaft (11) are embedded in the spline groove (9) of the chain wheel (5), and the chain wheel (5) slides on the output shaft of the motor (4) in the axial direction.

4. A dragline sifting bucket as claimed in claim 1 wherein, The protective shell (7) on each side of the digging bucket (1) is provided with an inspection opening, and a sealing plate (12) is arranged at the inspection opening and fixedly connected with the protective shell (7) through bolts and nuts.

5. A dragline sifting bucket as claimed in claim 1 wherein, The outer wall of the digging bucket (1) is fixedly connected with a wear plate (13).

6. A dragline sifting bucket as claimed in claim 1 wherein, The front part of the digging bucket (1) is integrally formed with a side blade (14).

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