A discharge port adjustment mechanism for a cone crusher

Abstract

This utility model provides a discharge port adjustment mechanism for a cone crusher, relating to the field of cone crushers, and mainly addresses the problems of complex discharge port adjustment structures and easy spring breakage in existing technologies. The cone crusher includes an upper frame, a lower frame, a moving cone liner, and a fixed cone liner. A spline groove is provided along the circumference of the lower frame, and a spline keyway that mates with the spline groove is provided on the upper frame. A hydraulic cylinder and a height adjustment block are arranged between the spline keyway and the lower frame. The hydraulic cylinder consists of a cylinder body, a piston rod, a spring, and a damper. The spring is located in the upper chamber of the hydraulic cylinder, the damper is connected to the upper chamber, and the lower chamber is connected to an oil pump. The discharge port adjustment mechanism of this utility model has the advantages of simple structure, easy operation, low processing difficulty, and low manufacturing cost. This utility model uses a damper to compensate for the insufficient rigidity of the spring, solving the problem of easy spring breakage while ensuring preload and rigidity.

Description

Technical Field

[0001] This utility model is specifically a discharge port adjustment mechanism for a cone crusher, and relates to the field of cone crusher technology. Background Technology

[0002] The core components of a cone crusher are the eccentric main shaft, the moving cone liner, and the fixed cone liner. The eccentric main shaft causes the moving cone liner to rotate eccentrically, thereby crushing the material through compression. After a period of operation, the discharge opening size between the moving and fixed cone liners will increase due to wear. At this time, it is necessary to raise and lower the fixed cone liner to adjust the discharge opening size. Currently, existing cone crushers adjust the discharge opening size through a motor, gear ring, and threaded structure, which has the drawbacks of complex structure and high manufacturing cost. In addition, existing cone crushers use springs to connect the upper and lower frames to reduce the crushing impact. According to design requirements, the springs need to have high rigidity, but it has been found that the springs are prone to breakage during use, which greatly affects the smooth operation of production. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model discloses a discharge port adjustment mechanism for a cone crusher, adopting the following technical solution: A discharge port adjustment mechanism for a cone crusher is disclosed. The cone crusher includes an upper frame, a lower frame, a moving cone liner, and a fixed cone liner. A spline groove is provided along the circumference of the lower frame. A spline key is provided on the upper frame to mate with the spline groove. A hydraulic cylinder and a height adjustment block are arranged between the spline key and the lower frame. The hydraulic cylinder consists of a cylinder body, a piston rod, a spring, and a damper. The spring is located in the upper chamber of the hydraulic cylinder, the damper is connected to the upper chamber of the hydraulic cylinder, and the lower chamber of the hydraulic cylinder is connected to an oil pump.

[0004] Further improve the technical solution: The height adjustment block is composed of multiple pairs of stepped blocks, and each stepped block has multiple steps of equal height.

[0005] Further improve the technical solution: the height of each step is 0.5-2mm.

[0006] Further improvements to the technical solution: A damping orifice and a nitrogen tank are installed inside the damper.

[0007] Further technical improvements: The top of the piston rod is screwed to the keyway, and the bottom of the cylinder is hinged to the lower frame.

[0008] After implementing the above technical solution, the beneficial effects of this utility model compared to the prior art are: The discharge port adjustment mechanism of this utility model has the advantages of simple structure, easy operation, low processing difficulty and low manufacturing cost.

[0009] This invention uses a damper to compensate for the insufficient rigidity of the spring, thus solving the problem of spring breakage while ensuring preload and rigidity. Attached Figure Description

[0010] Appendix Figure 1 The diagram shown is a cross-sectional view of this cone crusher.

[0011] Appendix Figure 2 The image shown is a top view of this cone crusher.

[0012] Appendix Figure 3 The attached image shows the attached image. Figure 1 A magnified view of a portion of point P in the middle.

[0013] In the attached diagram: 1. Upper frame; 11. Keyboard; 2. Lower frame; 3. Moving cone liner; 4. Fixed cone liner; 5. Height adjustment block; 51. Step block; 6. Hydraulic cylinder; 61. Cylinder body; 62. Piston rod; 63. Spring; 64. Damper; 641. Damping orifice; 642. Nitrogen tank; 7. Oil pump. Detailed Implementation

[0014] The preferred embodiments of this utility model are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of this utility model and are not intended to limit the scope of protection of this utility model. It should be noted that in the description of this utility model, terms such as "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation and positional relationship, and therefore should not be construed as a limitation of this utility model. It should also be noted that in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0015] A discharge port adjustment mechanism for a cone crusher is disclosed, relating to the field of cone crushers, primarily to address the problems of complex discharge port adjustment structures and easy spring breakage in existing technologies. The composition and working principle of this cone crusher discharge port adjustment mechanism are described in detail below.

[0016] See attached document Figure 1-3This cone crusher mainly consists of an upper frame 1, a lower frame 2, a moving cone liner 3, and a fixed cone liner 4. The lower frame 2 has eight spline grooves along its circumference. The upper frame 1 has a spline key 11 that mates with the spline grooves. A hydraulic cylinder 6 and a height adjustment block 5 are located between the spline key 11 and the lower frame 2. The mating structure of the spline grooves and the spline key 11 prevents the upper frame 1 from rotating relative to the lower frame 2, allowing only vertical movement of the upper frame 1 relative to the lower frame 2.

[0017] Specifically, the hydraulic cylinder 6 consists of a cylinder body 61, a piston rod 62, a spring 63, and a damper 64. The top end of the piston rod 62 is screwed to the keyway 11, and the bottom end of the cylinder body 61 is hinged to the lower frame 2. The spring 63 is located in the upper chamber of the hydraulic cylinder 6, and the damper 64 is connected to the upper chamber of the hydraulic cylinder 6. The lower chamber of the hydraulic cylinder 6 is connected to the oil pump 7. Normally, the oil pump 7 is not working, and the lower chamber of the hydraulic cylinder 6 is open to the outside atmosphere. The function of the spring is to apply a downward preload to the upper frame 1 through the piston rod 62, so that the height adjusting block 5 is pressed tightly between the upper frame 1 and the lower frame 2, thereby forming a minimum gap between the moving cone liner 3 and the fixed cone liner 4. This gap is the size K of the discharge port. Another function of the spring is that when encountering hard materials that cannot be crushed, the contraction of the spring 63 can move the fixed cone liner 4 upward, thereby providing overload protection for the cone crusher.

[0018] According to the design requirements of existing cone crushers, the springs need to have high rigidity. If the spring rigidity is too low, the discharge opening size K will increase when encountering slightly harder materials, failing to guarantee the crushed particle size. However, high rigidity can cause the spring to break brittlely, affecting production. To solve the problem of easy spring breakage, this invention uses a spring 63 with lower rigidity, but uses a damper 64 to compensate for the insufficient rigidity of the spring 63, ensuring that the preload applied by the entire cylinder 6 to the upper frame 1 meets the design requirements.

[0019] Dampers are existing technology and are widely used in shock absorbers and gas springs. In this embodiment, a damping orifice 641 and a nitrogen tank 642 are provided inside the damper 64. When the piston rod 62 moves upward, nitrogen in the upper chamber of the cylinder 6 enters the nitrogen tank 642 through the damping orifice 641. Due to the small diameter of the damping orifice 641, the flow velocity of nitrogen in the damping orifice 641 is very high, which provides rigid damping for the upward movement of the piston rod 62, effectively increasing the stiffness of the spring 63. When the piston rod 62 moves downward, nitrogen in the nitrogen tank 642 enters the upper chamber of the cylinder 6 through the damping orifice 641, providing a buffering effect for the downward movement of the spring 63 and the piston rod 62.

[0020] The height adjustment block 5 is composed of multiple pairs of stepped blocks 51, each stepped block 51 having multiple steps of equal height, each step being 0.5-2mm high. In this embodiment, each set of height adjustment blocks 5 is composed of four pairs of stepped blocks 51, each step being 1mm high. When it is necessary to adjust the size K of the discharge port, oil is supplied to the lower chamber of the oil cylinder 6 through the oil pump 7, which in turn lifts the upper frame 1 upwards through the upward movement of the piston rod 62. At this time, it is only necessary to rearrange the stepped blocks 51 to a suitable height. Then, the oil pump 7 is turned off, allowing the lower chamber of the oil cylinder 6 to reconnect with the outside atmosphere. At this time, the oil cylinder 6 applies downward preload to the upper frame 1 again.

[0021] In summary, the discharge port adjustment mechanism of this cone crusher has the advantages of simple structure, easy operation, low processing difficulty, and low manufacturing cost. This cone crusher uses a damper to compensate for the insufficient rigidity of the spring, thus solving the problem of spring breakage while ensuring preload and rigidity.

[0022] It is worth noting that the content not described in detail in the above embodiments is prior art. It is also worth noting that any additions, subtractions, substitutions, and improvements made by those skilled in the art based on the structure and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A discharge opening adjustment mechanism for a cone crusher, the cone crusher comprising an upper frame, a lower frame, a moving cone liner and a stationary cone liner, characterized by: A spline groove is provided along the circumference of the lower frame, and a spline key is provided on the upper frame to mate with the spline groove. A hydraulic cylinder and a height adjustment block are provided between the spline key and the lower frame. The hydraulic cylinder consists of a cylinder body, a piston rod, a spring and a damper. The spring is located in the upper chamber of the hydraulic cylinder, the damper is connected to the upper chamber of the hydraulic cylinder, and the lower chamber of the hydraulic cylinder is connected to the oil pump.

2. A cone crusher discharge opening adjustment mechanism as claimed in claim 1, characterized in that: The height adjustment block is composed of multiple pairs of step blocks, each step block having multiple levels of equal height.

3. A cone crusher discharge opening adjustment mechanism as claimed in claim 2, characterized in that: The height of each step is 0.5-2mm.

4. A cone crusher discharge port adjustment mechanism as claimed in claim 1, characterized in that: The damper contains a damping orifice and a nitrogen tank.

5. The discharge port adjustment mechanism for a cone crusher as described in claim 1, characterized in that: The top of the piston rod is screwed to the keyway, and the bottom of the cylinder is hinged to the lower frame.

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