Jaw crusher overload protection device based on hydraulic assistance

Abstract

The utility model relates to the technical field of crushing equipment, and discloses a jaw crusher overload protection device based on hydraulic assistance, which comprises a side plate, a movable jaw plate is arranged at the left end of the front side of the side plate, a fixing part is fixedly connected to the front side of the side plate, an elbow seat is mounted at the left end of the inner wall of the fixing part, and the elbow seat is connected with the movable jaw plate through an elbow plate. A trapezoidal block is fixedly connected to the bottom end of the front side of the side plate, a mounting seat is detachably connected to the outer side of the trapezoidal block, a fixing block is fixedly connected to the right side of the outer wall of the mounting seat, a through hole is formed in the rear end of the top side of the fixing block, a sliding seat is fixedly connected to the right side of the side plate, and a positioning bolt is connected to the sliding seat through a sliding assembly. According to the utility model, the installation and maintenance are more portable and efficient, the disassembly and assembly time is shortened, and the labor cost is reduced; and meanwhile, through cooperation of a third spring, a connecting block and a baffle, the risk of sand and stone pouring is reduced, the spring fault probability is reduced, and therefore the maintenance cost and the downtime are reduced.

Description

Technical Field

[0001] This utility model relates to the field of crushing equipment technology, and in particular to an overload protection device for a jaw crusher based on hydraulic assistance. Background Technology

[0002] Jaw crushers crush materials between the fixed jaw plate and the moving jaw by swinging the moving jaw corresponding to the fixed jaw plate. Because their working load fluctuates greatly, the peak load is usually more than three times the average load. During operation, overload risks often occur due to uneven feeding or the entry of extremely hard, uncrushable materials (such as iron blocks, hereinafter referred to as material obstacles) into the crushing chamber. Therefore, jaw crushers generally need to take overload protection measures.

[0003] However, in actual operation, the following technical problems were found in the existing overload protection devices for jaw crushers:

[0004] In terms of installation and maintenance, existing overload protection devices for jaw crushers face numerous challenges. Most devices rely on spring-pull rod structures for overload protection; however, under the continuous high-intensity, high-load operation of the crusher, the springs are subjected to alternating stress for extended periods, making them prone to fatigue, aging, reduced elasticity, and even breakage, resulting in frequent replacements. Furthermore, the existing devices suffer from inadequate installation and disassembly designs, with complex connections between components, often relying on bolts or welding. Disassembly requires numerous tools, consuming significant time and manpower, severely impacting equipment maintenance efficiency. In addition, existing devices generally lack effective protection measures for the springs, leaving them largely exposed. During crushing operations, sand, gravel, and dust easily splash into the springs, hindering their normal extension and contraction, causing jamming, accelerating wear, and significantly increasing the risk of spring breakage. This frequent maintenance not only increases maintenance costs but also leads to frequent equipment downtime, greatly reducing production efficiency and negatively impacting the company's economic benefits.

[0005] In response to this technical problem, this application proposes an overload protection device for a hydraulically assisted jaw crusher. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings of existing technologies, such as the complex installation and disassembly of spring tie rod structures and the lack of internal protection leading to frequent maintenance, which affects production efficiency and economic benefits. The proposed device is a hydraulically assisted overload protection device for jaw crushers. This device makes installation and maintenance more convenient and efficient, shortens disassembly and assembly time, and reduces labor costs. At the same time, by utilizing the cooperation of spring three, connecting block and baffle, the risk of sand and gravel falling in is reduced, the probability of spring failure is reduced, thereby reducing maintenance costs and downtime.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] The hydraulically assisted overload protection device for a jaw crusher includes a side plate. A movable jaw plate is provided at the left front end of the side plate. A fixing member is fixedly connected to the front of the side plate. An elbow seat is installed at the left end of the inner wall of the fixing member. The elbow seat is connected to the movable jaw plate through the elbow plate. A trapezoidal block is fixedly connected to the bottom front end of the side plate. A mounting base is detachably connected to the outside of the trapezoidal block. A fixing block is fixedly connected to the right side of the outer wall of the mounting base. A through hole is opened at the rear end of the top side of the fixing block. A sliding block is fixedly connected to the right side of the side plate. A positioning bolt is connected to the sliding block through a sliding assembly. A slider is fixedly connected to the outside of the positioning bolt. The positioning bolt is detachably connected to the through hole. A positioning ring is threadedly connected to the bottom outer end of the positioning bolt.

[0009] Furthermore, a sleeve is fixedly connected to the inner wall of the mounting base, and a spring rod is connected to the sleeve through a spring assembly. A movable groove is provided on the left side of the outer wall of the mounting base, and the movable groove is detachably connected to the spring rod. The spring rod is connected to the movable jaw plate through a connecting seat.

[0010] Furthermore, the front and rear ends of the left side of the outer wall of the mounting base are provided with sliding grooves. The sliding grooves are connected to connecting blocks through movable components. A baffle is fixedly connected to the front side of the connecting block. The baffle is detachably connected to the spring pull rod.

[0011] Furthermore, the sliding assembly includes a spring seat and a limiting groove. The spring seat is fixedly connected to the middle of the outer side of the positioning bolt. The spring seat is slidably connected to the inner wall of the slide block. The top side of the spring seat is connected to the top side of the inner wall of the slide block through a spring.

[0012] Furthermore, the limiting groove is formed on the top side of the inner wall of the slide block, and the inner wall of the limiting groove is slidably connected to the outer side of the positioning bolt.

[0013] Furthermore, the spring assembly includes a second spring and a fixing plate. The second spring is sleeved on the right end of the outer side of the spring rod, and the left end of the second spring is fixedly connected to the left side of the inner wall of the mounting base. The fixing plate is fixedly connected to the right end of the outer side of the spring rod and is fixedly connected to the second spring.

[0014] Furthermore, the slider is slidably connected to the right side of the slide block.

[0015] Furthermore, the movable component includes a slide rod, which is fixedly connected to the inner wall of the slide groove. Springs are sleeved at both the top and bottom ends of the slide rod, and a connecting block is fixedly connected to one end of each spring. The connecting block is slidably connected to the outside of the slide rod.

[0016] This utility model has the following beneficial effects:

[0017] 1. This utility model achieves more convenient and efficient installation and maintenance. Through the quick pre-fixing structure of the trapezoidal block and the mounting base, combined with the slide block, positioning bolt, and other structures, a double fixing effect is achieved by utilizing the elastic pressure of a pair of spring seats and the threaded connection between the positioning ring and the bottom end of the positioning bolt. Compared with traditional devices, this significantly shortens the installation and disassembly time of the mounting base and substantially reduces labor costs during equipment maintenance.

[0018] 2. This utility model achieves improved protective performance. Through the cooperation of spring three, connecting block and baffle, the elastic support of spring three allows the baffle to swing synchronously with the spring rod in the movable groove. Compared with the traditional fixed protective structure, it can reduce the risk of sand and gravel intrusion, effectively block sand and gravel debris from entering the casing, significantly reduce the probability of spring two failures such as elastic decay and breakage caused by foreign objects, and greatly reduce maintenance costs and downtime for maintenance. Attached Figure Description

[0019] Figure 1 This is a perspective view of the hydraulically assisted overload protection device for a jaw crusher proposed in this utility model.

[0020] Figure 2 This is a schematic diagram of the slide structure of the hydraulically assisted overload protection device for a jaw crusher proposed in this utility model;

[0021] Figure 3 This is a schematic diagram of the spring tie rod structure of the hydraulically assisted overload protection device for a jaw crusher proposed in this utility model.

[0022] Figure 4 This is a schematic diagram of the baffle structure of the hydraulically assisted overload protection device for a jaw crusher proposed in this utility model.

[0023] Legend:

[0024] 1. Side plate; 2. Fixing component; 3. Trapezoidal block; 4. Mounting base; 5. Sleeve; 6. Fixing block; 7. Slide seat; 8. Sliding assembly; 9. Positioning bolt; 10. Connecting seat; 11. Slider; 12. Through hole; 13. Positioning ring; 14. Elbow seat; 15. Elbow plate; 16. Moving jaw plate; 17. Spring assembly; 18. Spring rod; 19. Movable groove; 20. Slide groove; 21. Movable assembly; 22. Connecting block; 23. Baffle; 801. Limiting groove; 802. Spring one; 803. Spring seat; 1701. Spring two; 1702. Fixing plate; 2101. Slide rod; 2102. Spring three. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figures 1-3 An embodiment of this utility model provides an overload protection device for a hydraulically assisted jaw crusher, comprising a side plate 1, a movable jaw plate 16 provided at the left front end of the side plate 1, a fixing member 2 fixedly connected to the front of the side plate 1, an elbow seat 14 installed at the left end of the inner wall of the fixing member 2, the elbow seat 14 being connected to the movable jaw plate 16 via an elbow plate 15, a trapezoidal block 3 fixedly connected to the bottom front end of the side plate 1, a mounting base 4 detachably connected to the outer side of the trapezoidal block 3, a fixing block 6 fixedly connected to the right side of the outer wall of the mounting base 4, a through hole 12 opened at the rear end of the top side of the fixing block 6, a sliding seat 7 fixedly connected to the right side of the side plate 1, a positioning bolt 9 connected to the sliding seat 7 via a sliding component 8, a slider 11 fixedly connected to the outer side of the positioning bolt 9, the positioning bolt 9 being detachably connected to the through hole 12, and a positioning ring 13 threadedly connected to the bottom outer side of the positioning bolt 9;

[0027] Specifically, the quick pre-fixing structure of trapezoidal block 3 and mounting base 4 enables convenient positioning of mounting base 4. Combined with the design of sliding base 7 and positioning bolt 9, the elastic pressing action of spring 802 on spring seat 803 ensures that positioning bolt 9 can be stably locked after being inserted into through hole 12 of fixing block 6, preventing it from slipping out due to external force. Furthermore, the threaded connection between positioning ring 13 and the bottom end of positioning bolt 9 further strengthens the fixing of positioning bolt 9, making its top side tightly abut against the bottom side of fixing block 6, forming a double fixing effect. This significantly improves the convenience of installation and disassembly and the stability of connection, solving the problem of inconvenient installation and disassembly of existing spring rod 18 structure. This double fixing design not only greatly shortens the installation and disassembly time of mounting base 4 and reduces the labor cost during equipment maintenance, but also effectively prevents mounting base 4 from loosening or shifting under the long-term high-frequency vibration of the crusher, avoiding uneven force on spring rod 18 due to component displacement, and extending the service life of core components such as spring rod 18.

[0028] Reference Figures 2-4A housing 5 is fixedly connected to the inner wall of the mounting base 4. The housing 5 is connected to a spring rod 18 via a spring assembly 17. A movable groove 19 is provided on the left side of the outer wall of the mounting base 4. The movable groove 19 is detachably connected to the spring rod 18. The spring rod 18 is connected to the moving jaw plate 16 via a connecting seat 10. Sliding grooves 20 are provided at both the front and rear ends of the left side of the outer wall of the mounting base 4. A connecting block 22 is connected to the sliding groove 20 via a movable assembly 21. A baffle 23 is fixedly connected to the front side of the connecting block 22. The baffle 23 is detachably connected to the spring rod 18. The sliding assembly 8 includes a spring seat 803 and a limiting groove 801. The spring seat 803 is fixedly connected to the middle of the outer side of the positioning bolt 9. The spring seat 803 is slidably connected to the inner wall of the slide block 7. The top side of the spring seat 803 is connected to the top side of the inner wall of the slide block 7 via a spring 802. The positioning groove 801 is formed on the top side of the inner wall of the slide block 7, and the inner wall of the positioning groove 801 is slidably connected to the outer side of the positioning bolt 9; the spring assembly 17 includes a second spring 1701 and a fixing plate 1702. The second spring 1701 is sleeved on the right side of the outer side of the spring rod 18, and the left side of the second spring 1701 is fixedly connected to the left side of the inner wall of the mounting base 4. The fixing plate 1702 is fixedly connected to the right side of the outer side of the spring rod 18, and the fixing plate 1702 is fixedly connected to the second spring 1701; the slider 11 is slidably connected to the right side of the slide block 7; the movable assembly 21 includes a slide rod 2101, which is fixedly connected to the inner wall of the slide groove 20. The top and bottom ends of the outer side of the slide rod 2101 are both sleeved with a third spring 2102. A connecting block 22 is fixedly connected to one end of the third spring 2102, and the connecting block 22 is slidably connected to the outer side of the slide rod 2101;

[0029] Specifically, the left end of the spring rod 18 is fixed to the connecting seat 10 with bolts. The sliding grooves 20 and baffles 23 on the front and rear ends of the left side of the mounting seat 4 cooperate with the elastic support of the spring 2102 on the outer side of the sliding rod 2101 to the connecting block 22, so that the baffle 23 can swing up and down in the movable groove 19 with the spring rod 18 and keep in sync. This effectively prevents sand and gravel debris from entering the casing 5, reduces the wear of impurities on the spring 1701 and the fixing plate 1702, extends the service life of the spring 1701, and avoids the disadvantage of frequent replacement due to the decline in the performance of the spring after long-term use. This structural design greatly enhances the protective performance of the device. By reducing the contact between the spring 1701 and impurities, it significantly reduces the probability of spring failure such as elastic decay and breakage caused by foreign objects jamming, and greatly reduces maintenance costs and downtime for maintenance.

[0030] Working principle: During operation, the moving jaw plate 16 is connected to the elbow seat 14 via the elbow plate 15 for crushing. The trapezoidal block 3 on the front side of the side plate 1 is quickly pre-fixed to the mounting seat 4. The middle of the outer side of the positioning bolt 9 is fixedly connected to the spring seat 803. The spring seat 803 slides on the inner wall of the slide 7, and its top side is connected to the top side of the inner wall of the slide 7 via spring 802. A slider 11 is also fixed on the outer side of the positioning bolt 9. The slider 11 slides with the right side of the slide 7. Under the action of spring 802, the positioning bolt 9 is inserted into the fixed position. After the through hole 12 of the fixed block 6 is stably locked, it is further reinforced by the positioning ring 13 connected by the thread on the bottom of the outer side of the positioning bolt 9, so that its top side is tightly abutted against the bottom side of the fixed block 6, achieving double fixation and ensuring the stability of the mounting base 4; the inner wall of the mounting base 4 is fixedly connected to the sleeve 5, and the second spring 1701 is sleeved on the right side of the outer side of the spring rod 18 inside the sleeve 5. The left side of the second spring 1701 is fixed to the left side of the inner wall of the mounting base 4, and the right side of the outer side of the spring rod 18 is fixedly connected to the fixing plate 1702 and the second spring 1701. 1. A spring rod 18 is connected to the movable jaw plate 16 via a connecting seat 10, providing elastic force during overload. A movable groove 19 is formed on the left side of the outer wall of the mounting seat 4 to cooperate with the spring rod 18. A sliding rod 2101 is fixed to the inner wall of the sliding groove 20 formed at the front and rear ends of the left side of the mounting seat 4. Springs 2102 are sleeved at the top and bottom ends of the outer side of the sliding rod 2101. A connecting block 22 is connected to one end of the springs 2102. The connecting block 22 slides against the sliding rod 2101. The front side of the connecting block 22... The fixed baffle 23 is detachably connected to the spring rod 18. During operation, the spring 2102 pushes the connecting block 22 to make the baffle 23 swing synchronously with the spring rod 18 in the movable groove 19, blocking sand and gravel debris from entering the housing 5 and protecting the spring 1701 and the fixed plate 1702. When the equipment is overloaded, the spring rod 18 compresses the spring 1701 to absorb the impact energy. After the overload is eliminated, the spring 1701 resets and drives the moving jaw plate 16 back to its original position. All structures work together to ensure the safe and stable operation of the crusher.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. Hydraulic auxiliary based overload protection device for a jaw crusher, characterized in that Includes a side plate (1), a movable jaw plate (16) is provided on the left front side of the side plate (1), a fixing member (2) is fixedly connected to the front side of the side plate (1), an elbow seat (14) is installed on the left side of the inner wall of the fixing member (2), the elbow seat (14) is connected to the movable jaw plate (16) through the elbow plate (15), a trapezoidal block (3) is fixedly connected to the bottom front side of the side plate (1), a mounting seat (4) is detachably connected to the outside of the trapezoidal block (3), a fixing block (6) is fixedly connected to the right side of the outer wall of the mounting seat (4), a through hole (12) is opened on the rear end of the top side of the fixing block (6), a slide (7) is fixedly connected to the right side of the side plate (1), a positioning bolt (9) is connected to the slide (7) through a sliding component (8), a slider (11) is fixedly connected to the outside of the positioning bolt (9), the positioning bolt (9) is detachably connected to the through hole (12), and a positioning ring (13) is threadedly connected to the bottom outside of the positioning bolt (9).

2. A hydraulic auxiliary based overload protection device for a jaw crusher as claimed in claim 1, characterised in that: The inner wall of the mounting base (4) is fixedly connected to a sleeve (5), and the sleeve (5) is connected to a spring rod (18) through a spring assembly (17). The left side of the outer wall of the mounting base (4) is provided with a movable groove (19), and the movable groove (19) is detachably connected to the spring rod (18). The spring rod (18) is connected to the moving jaw plate (16) through a connecting seat (10).

3. The hydraulic auxiliary based jaw crusher overload protection device according to claim 1, characterized in that: The mounting base (4) has sliding grooves (20) on both the front and rear ends of the left side of the outer wall. The sliding grooves (20) are connected to the connecting block (22) through the movable component (21). The front side of the connecting block (22) is fixedly connected to the baffle (23). The baffle (23) is detachably connected to the spring rod (18).

4. The hydraulic auxiliary based jaw crusher overload protection device of claim 1, wherein: The sliding assembly (8) includes a spring seat (803) and a limiting groove (801). The spring seat (803) is fixedly connected to the middle of the outer side of the positioning bolt (9). The spring seat (803) is slidably connected to the inner wall of the slide (7). The top side of the spring seat (803) is connected to the top side of the inner wall of the slide (7) through a spring (802).

5. A hydraulic auxiliary based overload protection arrangement for a jaw crusher as claimed in claim 4, characterised in that: The limiting groove (801) is opened on the top side of the inner wall of the slide (7), and the inner wall of the limiting groove (801) is slidably connected to the outer side of the positioning bolt (9).

6. The hydraulic auxiliary based jaw crusher overload protection device according to claim 2, characterized by: The spring assembly (17) includes a second spring (1701) and a fixing plate (1702). The second spring (1701) is sleeved on the right side of the outer side of the spring rod (18). The left side of the second spring (1701) is fixedly connected to the left side of the inner wall of the mounting base (4). The fixing plate (1702) is fixedly connected to the right side of the outer side of the spring rod (18). The fixing plate (1702) is fixedly connected to the second spring (1701).

7. The hydraulically assisted overload protection device for a jaw crusher according to claim 1, characterized in that: The slider (11) is slidably connected to the right side of the slide block (7).

8. A hydraulic auxiliary based overload protection arrangement for a jaw crusher as claimed in claim 3, characterised in that: The movable component (21) includes a slide rod (2101), which is fixedly connected to the inner wall of the slide groove (20). Springs (2102) are sleeved on both the top and bottom ends of the slide rod (2101). A connecting block (22) is fixedly connected to one end of the springs (2102) and the connecting block (22) is slidably connected to the outside of the slide rod (2101).

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