Jaw crusher

Abstract

The utility model relates to a jaw crusher which comprises a rack, a crank connecting rod mechanism and a fixed jaw plate which are arranged on the rack, a movable jaw plate arranged at the movable end of the crank connecting rod mechanism, and a spring pull rod mechanism, the spring pull rod mechanism comprises a fixed support arranged on the rack, a movable jaw pull rod arranged on the fixed support in a clearance penetrating mode and hinged to the movable jaw plate, a spring assembly arranged on the movable jaw pull rod in a sleeving mode, and a pair of guide idler wheels connected to the fixed support in a floating mode through a middle connecting piece. In the working process of the jaw crusher, the spring assembly can effectively absorb and buffer impact force generated when materials are crushed, and the movable jaw pull rod and the guide roller are matched for use, so that the movable jaw plate can be kept stable when being impacted, mechanical part damage caused by strenuous vibration is avoided, and the service life of the jaw crusher is prolonged. The service life of the spring pull rod mechanism is prolonged, and the maintenance and replacement frequency is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of solid waste aggregate manufacturing, and in particular to a jaw crusher. Background Technology

[0002] Jaw crushers play a crucial role in the crushing process of solid waste aggregates. Commonly known as jaw crushers or tiger's mouth crushers, these machines consist of a crushing chamber formed by two jaw plates: a moving jaw and a stationary jaw. They crush materials by mimicking the jaw movements of an animal. Jaw crushers are widely used in various industries, including mining and metallurgy, building materials, highways, railways, water conservancy, and chemicals, for crushing various ores and large materials.

[0003] Currently, the spring tie rod mechanism of jaw crushers has a design flaw. The spring sleeve is typically welded to a fixed bracket and combined with a small-hole spring seat to secure the spring. This structure easily leads to uneven force distribution, eccentric loading, and instability on the spring when the moving jaw tie rod swings up and down, ultimately causing wear and even breakage of the spring and the moving jaw tie rod. This problem severely affects the performance of the jaw crusher, increases the frequency of maintenance and replacement, negatively impacts production, and increases operating costs. Utility Model Content

[0004] The present invention aims to address the aforementioned shortcomings in the existing technology by providing a jaw crusher that extends the service life of the spring tie rod mechanism and reduces the frequency of maintenance and replacement.

[0005] The above-mentioned utility model objective is achieved through the following technical solution:

[0006] A jaw crusher includes a frame, a crank-connecting rod mechanism and a fixed jaw plate mounted on the frame, a movable jaw plate mounted on the moving end of the crank-connecting rod mechanism, and a spring-pull rod mechanism. The spring-pull rod mechanism includes a fixed bracket mounted on the frame, a movable jaw pull rod that passes through the fixed bracket with a gap and is hinged to the movable jaw plate, a spring assembly sleeved on the movable jaw pull rod, and a pair of guide rollers that are floatingly connected to the fixed bracket via an intermediate connector. One end of the spring assembly is fixed to the movable jaw pull rod, and the other end is movably inserted into the fixed bracket. The tops of the pair of guide rollers abut against the peripheral wall of the movable jaw pull rod.

[0007] By adopting the above technical solution, the jaw crusher of this utility model can effectively absorb and buffer the impact force generated when crushing materials during operation through the spring assembly; the cooperation between the moving jaw tie rod and the guide roller ensures that the moving jaw plate remains stable when subjected to impact, avoiding damage to mechanical parts caused by severe vibration; in addition, the two ends of the spring assembly are respectively fixed and movably inserted into the moving jaw tie rod and the fixed bracket, which not only improves the service life of the spring assembly but also makes it more convenient to replace the spring assembly; in summary, the jaw crusher of this utility model has an innovative structural design, which not only improves the service life of the equipment but also reduces maintenance costs, providing a more economical and efficient crushing solution for coarse crushing of solid waste aggregates.

[0008] The present invention is further configured such that: the spring assembly includes a locking nut, a positioning ring, a pull rod spring, and an adjusting ring arranged sequentially along the axial direction of the movable jaw pull rod and abutting against each other; the locking nut is threadedly connected to the movable jaw pull rod; and the adjusting ring is movably inserted into the fixed bracket.

[0009] By adopting the above technical solution, precise adjustment and locking of the moving jaw tie rod can be achieved. The locking nut allows users to adjust the tension of the spring tie rod mechanism by rotation, while the positioning ring ensures the positional stability of the locking nut during adjustment. The presence of the tie rod spring provides the necessary elasticity for the entire structure to maintain the stability and buffering effect of the moving jaw tie rod during operation. The movable plug-in design of the adjusting ring prevents the moving jaw tie rod from directly contacting the fixed bracket, thus adapting to different working conditions and requirements.

[0010] The present invention is further configured such that: the axial end face of the adjusting ring is provided with an arc-shaped outward protrusion, and the protrusion is movably inserted into the opening on the fixed bracket.

[0011] By adopting the above technical solution, a gap is created between the adjusting ring and the fixed bracket, and the protrusion and the opening maintain close contact without impact, which helps to extend the service life of the spring rod mechanism.

[0012] The present invention is further configured such that the opening on the fixed bracket is provided with a guide surface that cooperates with the protrusion.

[0013] By adopting the above technical solutions, it is beneficial to extend the service life of the spring tie rod mechanism.

[0014] The present invention is further configured such that: the intermediate connecting member includes a lifting elastic member disposed on the fixed bracket, a horizontal elastic member disposed on the moving end of the lifting elastic member, and a pair of roller brackets disposed on the moving end of the horizontal elastic member, wherein the guide roller is rotatably connected to the roller brackets.

[0015] By adopting the above technical solutions, the moving jaw tie rod can achieve better stability and buffering during operation. At the same time, the setting of lifting elastic elements and horizontal elastic elements makes the entire mechanism more adaptable and durable when subjected to impact and vibration. In addition, the guide rollers on the roller bracket can ensure that the moving jaw tie rod maintains the correct movement trajectory during adjustment, avoiding additional wear caused by deviation or jamming, thereby further improving the operating efficiency and reliability of the entire crusher.

[0016] The present invention is further configured such that: the lifting elastic element includes a first mounting seat disposed on the fixed bracket, at least two lifting slide rods disposed side by side on the first mounting seat, a first connecting seat slidably connected to the at least two lifting slide rods, and a pair of first springs sleeved on the lifting slide rods and symmetrically arranged on both sides of the first connecting seat, wherein the two ends of the first springs are respectively disposed on the first mounting seat and the first connecting seat.

[0017] By adopting the above technical solution, the height of the guide roller can be flexibly adjusted, making the entire mechanism more adaptable and durable when subjected to impact and vibration.

[0018] The present invention is further configured such that: the horizontal elastic element includes a second mounting base disposed on the first connecting base, at least two horizontal slide rods disposed side by side on the second mounting base, a second connecting base slidably connected to the at least two horizontal slide rods, and a pair of second springs sleeved on the horizontal slide rods and symmetrically arranged on both sides of the second connecting base, wherein the two ends of the second springs are respectively disposed on the second mounting base and the second connecting base.

[0019] By adopting the above technical solution, the horizontal position of the guide roller can be flexibly adjusted, making the entire mechanism more adaptable and durable when subjected to impact and vibration.

[0020] The present invention is further configured such that the helical directions of the first springs on two adjacent lifting slides are opposite, and the helical directions of the second springs on two adjacent horizontal slides are opposite.

[0021] By adopting the above technical solution, it has good stability and buffering capacity.

[0022] In summary, the beneficial technical effects of this utility model are as follows: During the operation of the jaw crusher of this utility model, the spring assembly can effectively absorb and buffer the impact force generated when crushing materials. The cooperation between the moving jaw tie rod and the guide roller enables the moving jaw plate to remain stable when subjected to impact, avoiding damage to mechanical parts caused by severe vibration, which helps to extend the service life of the spring tie rod mechanism and reduce the frequency of maintenance and replacement. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the jaw crusher of this utility model.

[0024] Figure 2 This is a schematic diagram of the main structure of the jaw crusher of this utility model.

[0025] Figure 3 This is a schematic diagram of the spring-pull rod mechanism of this utility model.

[0026] In the diagram, 1. Frame; 2. Crank-connecting rod mechanism; 3. Fixed jaw plate; 4. Movable jaw plate; 5. Spring-pull rod mechanism; 6. Fixed bracket; 7. Movable jaw pull rod; 8. Spring assembly; 81. Locking nut; 82. Positioning ring; 83. Pull rod spring; 84. Adjusting ring; 85. Protrusion; 9. Intermediate connecting part; 91. Lifting elastic element; 911. First mounting seat; 912. Lifting slide rod; 913. First connecting seat; 914. First spring; 92. Horizontal elastic element; 921. Second mounting seat; 922. Horizontal slide rod; 923. Second connecting seat; 924. Second spring; 93. Roller bracket; 10. Guide roller. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model clearer and easier to understand, the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] Reference Figure 1 This utility model discloses a jaw crusher, including a frame 1, a crank-connecting rod mechanism 2 and a fixed jaw plate 3 mounted on the frame 1, a movable jaw plate 4 mounted on the moving end of the crank-connecting rod mechanism 2, and a spring-pull rod mechanism 5. A crushing chamber is formed between the fixed jaw plate 3 and the movable jaw plate 4. The movable jaw plate 4 is located at the connecting rod position of the crank-connecting rod mechanism 2 and is directly driven by the eccentricity of an eccentric shaft. The lower end of the movable jaw plate 4 is hinged to the spring-pull rod mechanism 5. When the eccentric shaft rotates, the movable jaw plate 4 swings accordingly to crush the material within the crushing chamber.

[0029] Reference Figure 2 and Figure 3 The spring-pull mechanism 5 includes a fixed bracket 6 mounted on the frame 1, a movable jaw pull rod 7 that passes through the fixed bracket 6 with a gap and is hinged to the movable jaw plate 4, a spring assembly 8 sleeved on the movable jaw pull rod 7, and a pair of guide rollers 10 that are floatingly connected to the fixed bracket 6 via an intermediate connector 9. One end of the spring assembly 8 is fixed to the movable jaw pull rod 7, and the other end is movably inserted into the fixed bracket 6. The tops of the pair of guide rollers 10 abut against the peripheral wall of the movable jaw pull rod 7.

[0030] In the operation of this jaw crusher, the spring assembly 8 effectively absorbs and buffers the impact force generated during material crushing. The cooperation between the movable jaw tie rod 7 and the guide roller 10 ensures that the movable jaw plate 4 remains stable under impact, preventing damage to mechanical parts caused by severe vibration. Furthermore, the two ends of the spring assembly 8 are fixedly and movably inserted into the movable jaw tie rod 7 and the fixed bracket 6, respectively. This design not only improves the service life of the spring assembly 8 but also makes replacement more convenient. In summary, the jaw crusher of this invention is innovative in its structural design, which not only improves the service life of the equipment but also reduces maintenance costs, providing a more economical and efficient crushing solution for coarse crushing of solid waste aggregates.

[0031] Reference Figure 3 The spring assembly 8 includes a locking nut 81, a positioning ring 82, a pull rod spring 83, and an adjusting ring 84, which are arranged sequentially along the axial direction of the movable jaw pull rod 7 and abut against each other. The locking nut 81 is threaded onto the movable jaw pull rod 7. The axial end face of the adjusting ring 84 is provided with an arc-shaped protrusion 85. The protrusion 85 is movably inserted into an opening on the fixed bracket 6, and the opening on the fixed bracket 6 is provided with a guide surface that mates with the protrusion 85.

[0032] The spring assembly 8 enables precise adjustment and locking of the moving jaw rod 7. The locking nut 81 allows users to adjust the tension of the spring rod mechanism 5 by rotation, while the positioning ring 82 ensures the positional stability of the locking nut 81 during adjustment. The presence of the rod spring 83 provides the necessary elasticity for the entire structure, maintaining the stability and cushioning effect of the moving jaw rod 7 during operation. The movable insertion design of the adjusting ring 84 prevents direct contact between the moving jaw rod 7 and the fixed bracket 6, adapting to different working conditions and requirements. Simultaneously, the movable insertion creates a play between the adjusting ring 84 and the fixed bracket 6, ensuring tight contact between the protrusion 85 and the opening without impact, which helps extend the service life of the spring rod mechanism 5.

[0033] The intermediate connecting member 9 includes a lifting elastic element 91 mounted on the fixed bracket 6, a horizontal elastic element 92 mounted on the moving end of the lifting elastic element 91, and a pair of roller brackets 93 mounted on the moving end of the horizontal elastic element 92. Guide rollers 10 are rotatably connected to the roller brackets 93. The floating guide rollers 10 provide better stability and cushioning for the moving jaw tie rod 7 during operation. Simultaneously, the lifting elastic element 91 and the horizontal elastic element 92 enhance the adaptability and durability of the entire mechanism when subjected to impacts and vibrations. Furthermore, the guide rollers 10 on the roller brackets 93 ensure that the moving jaw tie rod 7 maintains the correct movement trajectory during adjustment, avoiding additional wear caused by misalignment or jamming, thereby further improving the overall operating efficiency and reliability of the crusher.

[0034] The lifting elastic element 91 includes a first mounting base 911 mounted on the fixed bracket 6, two lifting slide rods 912 arranged side by side on the first mounting base 911, a first connecting seat 913 slidably connected to the two lifting slide rods 912, and a pair of first springs 914 sleeved on the lifting slide rods 912 and symmetrically arranged on both sides of the first connecting seat 913. The two ends of the first springs 914 are respectively disposed on the first mounting base 911 and the first connecting seat 913. The horizontal elastic element 92 includes a second mounting base 921 mounted on the first connecting seat 913, two horizontal slide rods 922 arranged side by side on the second mounting base 921, a second connecting seat 923 slidably connected to the two horizontal slide rods 922, and a pair of second springs 924 sleeved on the horizontal slide rods 922 and symmetrically arranged on both sides of the second connecting seat 923. The two ends of the second springs 924 are respectively disposed on the second mounting base 921 and the second connecting seat 923. The first springs 914 on two adjacent lifting slides 912 have opposite helical directions, and the second springs 924 on two adjacent horizontal slides 922 have opposite helical directions.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A jaw crusher comprising a frame (1), a crank link mechanism (2) and a fixed jaw plate (3) arranged on the frame (1), a movable jaw plate (4) arranged on the moving end of the crank link mechanism (2), and a spring tie rod mechanism (5), characterized in that: The spring pull rod mechanism (5) comprises a fixed support (6) arranged on the frame (1), a movable jaw pull rod (7) arranged in gaps on the fixed support (6) and hinged to the movable jaw plate (4), a spring assembly (8) sleeved on the movable jaw pull rod (7), and a pair of guide rollers (10) floatingly connected to the fixed support (6) through an intermediate connecting piece (9), one end of the spring assembly (8) is fixed to the movable jaw pull rod (7), the other end is movably inserted into the fixed support (6), and the top of the pair of guide rollers (10) abuts against the peripheral wall of the movable jaw pull rod (7).

2. A jaw crusher as claimed in claim 1, characterized in that: The spring assembly (8) comprises a locking nut (81), a positioning ring (82), a pull rod spring (83) and an adjusting ring (84) arranged in sequence along the movable jaw pull rod (7) and abutting against each other, the locking nut (81) is threadedly connected to the movable jaw pull rod (7), and the adjusting ring (84) is movably inserted into the fixed support (6).

3. A jaw crusher as claimed in claim 2, characterized in that: An axially end surface of the adjusting ring (84) is provided with a protruding part (85) protruding outward in an arc shape, and the protruding part (85) is movably inserted into an opening in the fixed support (6).

4. A jaw crusher as claimed in claim 3, characterized in that: The opening in the fixed support (6) is provided with a guide surface matched with the protruding part (85).

5. A jaw crusher as claimed in claim 1, characterized in that: The intermediate connecting piece (9) comprises a lifting elastic member (91) arranged on the fixed support (6), a horizontal elastic member (92) arranged at a moving end of the lifting elastic member (91), and a pair of roller supports (93) arranged at a moving end of the horizontal elastic member (92), and the guide rollers (10) are rotationally connected to the roller supports (93).

6. A jaw crusher as claimed in claim 5, characterised in that: The lifting elastic member (91) comprises a first mounting seat (911) arranged on the fixed support (6), at least two lifting slide rods (912) arranged side by side on the first mounting seat (911), a first connecting seat (913) slidingly connected to the at least two lifting slide rods (912), and a pair of first springs (914) sleeved on the lifting slide rods (912) and symmetrically arranged on both sides of the first connecting seat (913), and two ends of the first spring (914) are arranged on the first mounting seat (911) and the first connecting seat (913) respectively.

7. A jaw crusher as claimed in claim 6, characterized in that: The horizontal elastic member (92) comprises a second mounting seat (921) arranged on the first connecting seat (913), at least two horizontal slide rods (922) arranged side by side on the second mounting seat (921), a second connecting seat (923) slidingly connected to the at least two horizontal slide rods (922), and a pair of second springs (924) sleeved on the horizontal slide rods (922) and symmetrically arranged on both sides of the second connecting seat (923), and two ends of the second spring (924) are arranged on the second mounting seat (921) and the second connecting seat (923) respectively.

8. A jaw crusher as claimed in claim 7, characterized in that: The first spring (914) on two adjacent lifting slide rods (912) is opposite in helical direction, and the second spring (924) on two adjacent horizontal slide rods (922) is opposite in helical direction.

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