Crushing bucket eccentric driving device special for excavator
By optimizing the inertia wheel and bearing structure of the eccentric drive device, the crushing bucket has achieved efficient and stable operation, solving the problems of high energy consumption and static imbalance in existing devices, and improving crushing efficiency and device reliability.
Patent Information
- Application Number
- CN202423258567.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing crusher bucket drive devices have high power consumption and static imbalance, which leads to reduced bearing life and eccentric shaft breakage, affecting normal use. At the same time, the structural design is unreasonable, and the ease of installation and reliability are insufficient.
Design an eccentric drive device including an eccentric shaft, a hydraulic motor, an inertia wheel, an arc block, and an arc hole. By optimizing the structure of the inertia wheel and the bearing combination, static balance is achieved, energy consumption is reduced, and crushing efficiency is improved.
It effectively reduces power consumption by 20%-35%, improves crushing efficiency, extends the life of bearings and supports, ensures the stability and reliability of the equipment, and meets the requirements of energy conservation and environmental protection.
Smart Images
Figure CN223732830U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mining machinery, specifically to an eccentric drive device for a crusher bucket used in excavators. Background Technology
[0002] In mining and other engineering operations, crushing buckets play a crucial role as important mining machinery for crushing stone. Their working principle relies on a hydraulic motor that rotates an eccentric shaft, which in turn causes the movable jaw plate to reciprocate. This allows material to enter the crushing chamber between the movable and fixed jaw plates from the feed hopper. As the movable jaw plate reciprocates, it is continuously squeezed by the fixed jaw plate, thus achieving the function of crushing stone.
[0003] However, existing crushing buckets generally suffer from high power consumption and high energy consumption, which not only increases production costs but also fails to meet current requirements for energy conservation, environmental protection, and efficient operation. Furthermore, in existing drive systems, the performance of the eccentric drive has a significant impact on crushing efficiency and energy consumption. Some drive systems suffer from static imbalance due to inadequate structural design. When the eccentric drive is statically unbalanced, it generates a torque on the eccentric shaft. Without proper counterweighting, this excessive eccentric torque often puts significant pressure on the bearing housing and support components during operation, leading to reduced bearing and support lifespan. More seriously, if the eccentric torque exceeds the bearing's capacity, it can cause the eccentric shaft to break, affecting the normal operation of the entire crushing bucket. In addition, the traditional eccentric wheel structure also has room for improvement in terms of processing costs, ease of installation, and reliability.
[0004] In summary, in order to overcome the above-mentioned shortcomings of existing crusher bucket drive devices, it is necessary to develop a new type of excavator-specific eccentric crusher bucket drive device to reduce the energy consumption of the crusher, improve working efficiency, and enhance the overall stability and reliability of the device. Utility Model Content
[0005] This utility model addresses the aforementioned problems in the existing technology by providing an eccentric drive device for a crusher bucket specifically designed for excavators.
[0006] The objective of this utility model is mainly achieved through the following solution:
[0007] An eccentric drive device for a crusher bucket for excavators includes an eccentric shaft and a hydraulic motor. One end of the eccentric shaft is fixedly connected to the output shaft of the hydraulic motor, and the other end of the eccentric shaft is connected to an inertia wheel. An eccentric wheel is installed in the middle of the eccentric shaft.
[0008] The two ends of the eccentric shaft are respectively equipped with a first bearing group and a second bearing group, and the eccentric drive device is installed on the crushing bucket body through the first bearing group and the second bearing group.
[0009] An arc-shaped block and an arc-shaped hole are provided on the outer side of the inertial wheel, and the arc-shaped block and the arc-shaped hole are arranged vertically opposite to each other;
[0010] The eccentric wheel includes an eccentric wheel main body and an eccentric wheel fixing block detachably and fixedly connected to the eccentric wheel main body, and the eccentric wheel main body is arranged opposite to the arc-shaped block.
[0011] Preferably, the first bearing group includes a first bearing retaining ring, a first bearing fixing seat, a second bearing retaining ring, a third bearing retaining ring, a first bearing cover, a second bearing fixing seat, a fourth bearing retaining ring, a first bearing main body and a second bearing main body. The inner rings of the first bearing main body and the second bearing main body are sleeved on the side wall of the eccentric shaft, and the outer ring of the first bearing main body is fixedly installed in the first bearing fixing seat. One end of the first bearing fixing seat is fixedly connected to the hydraulic motor fixing plate, and the side protrusion of the hydraulic motor fixing plate extends into the first bearing fixing seat. The first bearing retaining ring is located between the side protrusion of the hydraulic motor fixing plate and the outer ring of the first bearing main body. The second bearing retaining ring and the third bearing retaining ring are located between the inner rings of the first bearing main body and the second bearing main body. The fourth bearing retaining ring is located between the inner ring of the second bearing main body and the middle protrusion of the eccentric shaft. The outer ring of the second bearing main body is fixedly installed in the second bearing fixing seat, and the first bearing cover is fixedly installed on both sides of the second bearing fixing seat.
[0012] Preferably, the second bearing group includes a second bearing cover, a third bearing fixing seat, a first bearing main body, a second bearing main body, a fourth bearing retaining ring, a second bearing fixing seat, a first bearing cover, a third bearing retaining ring and a second bearing retaining ring. The inner rings of the first bearing main body and the second bearing main body are sleeved on the side wall of the eccentric shaft, and the outer ring of the first bearing main body is fixedly installed in the third bearing fixing seat. The second bearing cover is fixedly installed on one side of the third bearing fixing seat, and the side protrusion of the second bearing cover extends into the third bearing fixing seat and abuts against the outer ring of the first bearing main body. The second bearing retaining ring and the third bearing retaining ring are located between the inner rings of the first bearing main body and the second bearing main body. The fourth bearing retaining ring is located between the inner ring of the second bearing main body and the middle protrusion of the eccentric shaft. The outer ring of the second bearing main body is fixedly installed in the second bearing fixing seat, and the first bearing cover is fixedly installed on both sides of the second bearing fixing seat.
[0013] Preferably, the central angle a of the arc-shaped block ranges from 120° < a < 180°, and the ratio of the inner diameter of the arc-shaped hole to the diameter of the inertial wheel is not less than 1 / 3, and the ratio b of the area of the arc-shaped hole to the area of the inertial wheel ranges from 0.35 < b < 0.2.
[0014] Therefore, compared with the prior art, the present utility model has the following advantages:
[0015] (1) The inertial wheel in this utility model is designed with an arc-shaped hole. On the one hand, it can reduce the weight of the inertial wheel and reduce the energy consumption of the equipment. On the other hand, the arc-shaped hole with this structure shape can reduce the influence of wind speed on the inertial wheel, effectively reduce resistance, and effectively save 20% - 35% of power consumption, thereby significantly reducing the energy consumption of the entire crushing bucket, which meets the requirements of energy conservation and environmental protection.
[0016] (2) By setting the first bearing group and the second bearing group, the rotation of the eccentric shaft is more stable and efficient, which in turn drives the movable jaw plate to reciprocate more stably, effectively improving the crushing efficiency of the material and enhancing the working efficiency of the entire crushing bucket.
[0017] (3) The eccentric wheel in this utility model adopts a split design, which reduces the processing cost, improves the reliability and ease of installation, and by designing an arc block on the inertia wheel, the eccentric wheel and the arc block on the inertia wheel are symmetrical, so that the eccentric shaft can achieve static balance during rotation, ensuring the stability of the eccentric shaft during rotation, avoiding damage to the bearing body, bearing fixing seat and eccentric shaft itself caused by static imbalance, extending the life of the bearing body and bearing fixing seat, and ensuring the long-term stable and reliable operation of the entire drive device;
[0018] (4) This utility model has a simple structure and reasonable design. It not only has a good crushing effect, but also low energy consumption. Its comprehensive performance is significantly improved compared with the existing crushing bucket drive device, which can better meet the needs of mining and other engineering fields for efficient, stable and energy-saving operation of crushing buckets. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the structure of the inertia wheel in this utility model;
[0021] Figure 3 This is a schematic diagram of the eccentric wheel in this utility model.
[0022] Illustration: 1-Hydraulic motor, 2-Hydraulic motor mounting plate, 3-First bearing retaining ring, 4-First bearing mounting seat, 5-Second bearing retaining ring, 6-Third bearing retaining ring, 7-First bearing cover, 8-Second bearing mounting seat, 9-Fourth bearing retaining ring, 10-First bearing body, 11-Second bearing body, 12-Eccentric wheel, 12-1-Eccentric wheel fixing block, 12-2-Eccentric wheel body, 13-Third bearing mounting seat, 14-Second bearing cover, 15-Inertia wheel, 15-1-Arc-shaped block, 15-2-Arc-shaped hole, 16-Eccentric shaft. Detailed Implementation
[0023] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of this utility model is not limited to the following embodiments, and any modifications and / or alterations made to this utility model will fall within the protection scope of this utility model.
[0024] In this invention, unless otherwise specified, all parts and percentages are by weight, and the equipment and raw materials used are commercially available or commonly used in the field. Unless otherwise specified, the methods in the following embodiments are conventional methods in the field. Unless otherwise specified, the components or equipment in the following embodiments are general standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.
[0025] Example 1:
[0026] like Figure 1 As shown, this utility model provides a technical solution: an eccentric drive device for a crusher bucket used in excavators, comprising an eccentric shaft 16 and a hydraulic motor 1. One end of the eccentric shaft 16 is fixedly connected to the output shaft of the hydraulic motor 1. The connection can be made using existing robust connection techniques, such as a spline connection, to ensure stable power transmission between the two. An inertia wheel 15 is connected to the other end of the eccentric shaft 16, and an eccentric wheel 12 is installed in the middle of the eccentric shaft 16; similarly, the connection must be secure.
[0027] Specifically, a first bearing assembly and a second bearing assembly are respectively installed at both ends of the eccentric shaft 16, and the eccentric drive device is installed on the main body of the crushing bucket through the first bearing assembly and the second bearing assembly.
[0028] Specifically, such as Figure 2 As shown, the outer side of the inertia wheel 15 is provided with an arc-shaped block 15-1 and an arc-shaped hole 15-2, and the arc-shaped block 15-1 and the arc-shaped hole 15-2 are arranged opposite each other vertically.
[0029] Specifically, such as Figure 3 As shown, the eccentric wheel 12 includes an eccentric wheel body 12-2 and an eccentric wheel fixing block 12-1 that is detachably fixed to the eccentric wheel body 12-2 by bolts. The eccentric wheel body 12-2 and the arc-shaped block 15-1 are arranged vertically opposite each other.
[0030] Example 2:
[0031] like Figure 1As shown, this utility model provides another technical solution: an eccentric drive device for a crusher bucket specifically for excavators. The difference from Embodiment 1 is that the aforementioned first bearing assembly includes a first bearing retaining ring 3, a first bearing fixing seat 4, a second bearing retaining ring 5, a third bearing retaining ring 6, a first bearing cover 7, a second bearing fixing seat 8, a fourth bearing retaining ring 9, a first bearing body 10, and a second bearing body 11. The inner rings of both the first bearing body 10 and the second bearing body 11 are fitted onto the side wall of the eccentric shaft 16, and the outer ring of the first bearing body 10 is fixedly installed inside the first bearing fixing seat 4. One end of the first bearing fixing seat 4 is fixed to the hydraulic motor. The fixed plate 2 is fixedly connected by bolts. The side protrusion of the hydraulic motor fixed plate 2 extends into the first bearing fixed seat 4. The first bearing retaining ring 3 is located between the side protrusion of the hydraulic motor fixed plate 2 and the outer ring of the first bearing body 10. The second bearing retaining ring 5 and the third bearing retaining ring 6 are located between the inner ring of the first bearing body 10 and the inner ring of the second bearing body 11. The fourth bearing retaining ring 9 is located between the inner ring of the second bearing body 11 and the middle protrusion of the eccentric shaft 16. The outer ring of the second bearing body 11 is fixedly installed in the second bearing fixed seat 8, and the first bearing cover 7 is fixedly installed on both sides of the second bearing fixed seat 8 by bolts.
[0032] Specifically, the second bearing assembly includes a second bearing cover 14, a third bearing mounting base 13, a first bearing body 10, a second bearing body 11, a fourth bearing retaining ring 9, a second bearing mounting base 8, a first bearing cover 7, a third bearing retaining ring 6, and a second bearing retaining ring 5. The inner rings of the first bearing body 10 and the second bearing body 11 are both fitted onto the side wall of the eccentric shaft 16, and the outer ring of the first bearing body 10 is fixedly installed inside the third bearing mounting base 13. The second bearing cover 14 is fixedly installed on one side of the third bearing mounting base 13 by bolts, and the side protrusion of the second bearing cover 14 extends into the third bearing mounting base. The first bearing retainer 5 and the second bearing retainer 6 are located between the inner ring of the first bearing body 10 and the inner ring of the second bearing body 11. The third bearing retainer 9 is located between the inner ring of the second bearing body 11 and the central protrusion of the eccentric shaft 16. The outer ring of the second bearing body 11 is fixedly installed in the second bearing mounting seat 8, and the first bearing cover 7 is fixedly installed on both sides of the second bearing mounting seat 8 with crown bolts. The device is fixed to the crushing bucket body by the first bearing mounting seat 4, the second bearing mounting seat 8 and the third bearing mounting seat 13 and bolts.
[0033] Example 3:
[0034] like Figure 2As shown in the figure, the present utility model provides another technical solution, an eccentric drive device for a special crushing bucket of an excavator. The difference from Embodiment 1 is that the range of the central angle a of the arc-shaped block 15-1 is 120° < a < 180°, the ratio of the inner diameter of the arc-shaped hole 15-2 to the diameter of the inertia wheel 15 is not less than 1 / 3, and the range of the ratio b of the area of the arc-shaped hole 15-2 to the area of the inertia wheel 15 is 0.35 < b < 0.2; while the huge inertia moment of the inertia wheel 15 satisfies the crushing work, it also consumes work itself. By setting the arc-shaped hole 15-2 on the inertia wheel 15, on the one hand, the weight of the inertia wheel 15 can be reduced, and the energy consumption of the equipment can be lowered. At the same time, by adopting the arc-shaped hole 15-2 with this structural shape, the influence of the wind speed on the inertia wheel 15 can be reduced, the resistance can be effectively reduced, and 20% - 35% of the power consumption can be effectively saved; by designing the arc-shaped block 15-1 on the inertia wheel 15, the eccentric wheel 12 and the arc-shaped structure on the inertia wheel 15 are symmetric up and down, so that the eccentric shaft reaches static balance during rotation, ensuring the smoothness of the eccentric shaft during rotation.
[0035] An eccentric drive device for a special crushing bucket of an excavator in this application realizes the purpose of reducing energy consumption and improving work efficiency by optimizing the structural design of the inertia wheel and the eccentric wheel and improving the support mode of the eccentric shaft. This device has a simple structure, reasonable design, good crushing effect, and low energy consumption, and has broad application prospects and significant economic benefits.
[0036] It should be understood that this embodiment is only used to illustrate the present utility model and not to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the present utility model, those skilled in the art can make various changes or modifications to the present utility model, and these equivalent forms also fall within the scope defined by the appended claims of this application.
Claims
1. An eccentric drive device for a special breaking bucket of an excavator, comprising an eccentric shaft (16) and a hydraulic motor (1), characterized in that: One end of the eccentric shaft (16) is fixedly connected with the output shaft of the hydraulic motor (1), the other end of the eccentric shaft (16) is connected with the inertia wheel (15), and the middle of the eccentric shaft (16) is provided with the eccentric wheel (12); The two ends of the eccentric shaft (16) are respectively provided with the first bearing set and the second bearing set, and the eccentric driving device is installed on the crushing hopper body through the first bearing set and the second bearing set. The outer side of the inertia wheel (15) is provided with the arc block (15-1) and the arc hole (15-2), and the arc block (15-1) and the arc hole (15-2) are oppositely arranged. The eccentric wheel (12) comprises an eccentric wheel body (12-2) and an eccentric wheel fixed block (12-1) which is detachably and fixedly connected to the eccentric wheel body (12-2), and the eccentric wheel body (12-2) is oppositely arranged with the arc block (15-1).
2. A device for eccentrically driving a special breaking bucket of an excavator according to claim 1, characterized in that: The first bearing set comprises a first bearing retainer (3), a first bearing fixed seat (4), a second bearing retainer (5), a third bearing retainer (6), a first bearing cover (7), a second bearing fixed seat (8), a fourth bearing retainer (9), a first bearing body (10) and a second bearing body (11), the inner rings of the first bearing body (10) and the second bearing body (11) are sleeved on the side wall of the eccentric shaft (16), the outer ring of the first bearing body (10) is fixedly installed in the first bearing fixed seat (4), one end of the first bearing fixed seat (4) is fixedly connected with the hydraulic motor fixed plate (2), the side protruding part of the hydraulic motor fixed plate (2) protrudes into the first bearing fixed seat (4), the first bearing retainer (3) is located between the side protruding part of the hydraulic motor fixed plate (2) and the outer ring of the first bearing body (10), the second bearing retainer (5) and the third bearing retainer (6) are located between the inner ring of the first bearing body (10) and the inner ring of the second bearing body (11), the fourth bearing retainer (9) is located between the inner ring of the second bearing body (11) and the middle protruding part of the eccentric shaft (16), the outer ring of the second bearing body (11) is fixedly installed in the second bearing fixed seat (8), and the first bearing cover (7) is fixedly installed on both sides of the second bearing fixed seat (8).
3. The eccentric drive for a specialized excavator bucket of claim 1, wherein: The second bearing set comprises a second bearing cover (14), a third bearing fixed seat (13), a first bearing body (10), a second bearing body (11), a fourth bearing retainer (9), a second bearing fixed seat (8), a first bearing cover (7), a third bearing retainer (6) and a second bearing retainer (5), the inner rings of the first bearing body (10) and the second bearing body (11) are sleeved on the side wall of the eccentric shaft (16), the outer ring of the first bearing body (10) is fixedly installed in the third bearing fixed seat (13), the second bearing cover (14) is fixedly installed on one side of the third bearing fixed seat (13), the side protruding part of the second bearing cover (14) extends into the third bearing fixed seat (13) and abuts between the outer ring of the first bearing body (10), the second bearing retainer (5) and the third bearing retainer (6) are located between the inner ring of the first bearing body (10) and the inner ring of the second bearing body (11), the fourth bearing retainer (9) is located between the inner ring of the second bearing body (11) and the middle protruding part of the eccentric shaft (16), the outer ring of the second bearing body (11) is fixedly installed in the second bearing fixed seat (8), and the first bearing cover (7) is fixedly installed on both sides of the second bearing fixed seat (8).
4. The eccentric drive for a specialized excavator breaker bucket of claim 1, wherein: The central angle a of the arc-shaped block (15-1) ranges from 120° to 180°, the ratio of the inner diameter of the arc-shaped hole (15-2) to the diameter of the inertia wheel (15) is not less than 1 / 3, and the ratio b of the area of the arc-shaped hole (15-2) to the area of the inertia wheel (15) ranges from 0.35 to 0.2.