Jaw crusher with movable toothed plate

Abstract

The utility model belongs to the technical field of crusher, concretely relates to a movable tooth plate for jaw crusher, including fixed frame, the fixed frame is detachably provided with the crushing tooth base plate, the crushing tooth base plate is longitudinally provided with a plurality of parallelly arranged first crushing tooth racks on the side away from the fixed frame, still be provided with the second crushing tooth rack of tooth peak higher than the first crushing tooth rack on the crushing tooth base plate of the same side of the first crushing tooth rack, the adjacent second crushing tooth rack interval is equal. The crushing tooth base plate is longitudinally provided with the crushing tooth of two different tooth height, can cope with the material of greater size difference to enter, the more prominent crushing tooth has stronger occlusal force to the more hard material and exerts stress, to improve the efficiency and make the crushing more thorough. And the high tooth peak maintains the tooth shape ability stronger, thereby delays the replacement frequency of tooth plate and effectively reduces the use cost.

Description

Technical Field

[0001] This utility model belongs to the field of crusher technology, specifically relating to a moving tooth plate for a jaw crusher. Background Technology

[0002] The moving jaw plate is one of the most important wear-resistant components in a jaw crusher. Mounted on the moving jaw, it forms the crushing chamber together with the fixed jaw plate. Driven by an eccentric shaft, the moving jaw performs periodic reciprocating motion, crushing the material between the moving and fixed jaw plates. The jaw plates are wear parts and are typically replaced periodically to maintain crushing efficiency. The height and shape of the jaw plates directly affect crushing efficiency and durability. Higher or deeper teeth can crush larger pieces of material, but they also wear more easily.

[0003] Patent CN202538828U discloses a jaw crusher tooth plate that avoids jaw gripping and improves crushing efficiency. It includes a fixed tooth plate and a movable tooth plate. The working surface of the fixed tooth plate has a concave curved surface, and the working surface of the movable tooth plate has a convex curved surface. The radius of curvature of the concave curved surface of the fixed tooth plate is greater than or equal to the radius of curvature of the convex curved surface of the movable tooth plate. The working surfaces of the fixed and movable tooth plates are divided into upper and lower parts, with the rack arrangement of the upper part of the working surface perpendicular to that of the lower part. This jaw crusher tooth plate, due to its concave and convex curved surfaces, can effectively grip and crush any shape of material, eliminating jaw gripping. Simultaneously, the material is crushed by secondary, mutually perpendicular cutting edges, greatly improving crushing efficiency, and producing uniformly sized and shaped output pieces.

[0004] In the above scheme, the corresponding convex and concave curved surfaces actually have the same closed distance as the plane, which does not improve the biting force on the material or the crushing efficiency. Furthermore, the crushing ratio at this point will be reduced after the convex tooth surface is worn. Failure to replace the entire surface will seriously affect the output particle size distribution. Summary of the Invention

[0005] The purpose of this utility model is to address the above-mentioned problems by providing a moving tooth plate for a jaw crusher that can solve the aforementioned technical issues.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A moving tooth plate for a jaw crusher includes a fixed frame. A crushing tooth base plate is detachably mounted on the fixed frame. Several parallel first crushing teeth are longitudinally arranged on one side of the crushing tooth base plate opposite to the fixed frame. On the same side of the first crushing teeth, a second crushing tooth with a tooth peak higher than the first crushing teeth is also provided on the crushing tooth base plate. The spacing between adjacent second crushing teeth is equal.

[0007] In the moving toothed plate of the jaw crusher, the second crushing rack is shorter than the first crushing rack and is symmetrically arranged at the center of the crushing toothed plate.

[0008] In the moving toothed plate of the jaw crusher, the tooth valleys of adjacent first crushing toothed plates are connected to each other, and the second crushing toothed plate is disposed on it along the tooth peak of the first crushing toothed plate.

[0009] In the moving toothed plate of the jaw crusher, the two ends of the second crushing rack are provided with inclined transition surfaces that connect with the first crushing rack, and the inclined transition surfaces form an obtuse angle with the tooth peak of the first crushing rack.

[0010] In the moving toothed plate of the jaw crusher, the second crushing tooth is arranged in parallel between adjacent first crushing tooth plates, and the distance between the second crushing tooth and the two adjacent first crushing tooth plates is the same.

[0011] In the moving toothed plate for the jaw crusher, the two ends of the second crushing toothed plate are provided with inclined transition surfaces that connect with the crushing toothed plate, and the inclined transition surfaces form an obtuse angle with the crushing toothed plate.

[0012] In the moving toothed plate of the jaw crusher, the second crushing toothed plate has a trapezoidal cross section, the tooth peak is provided with an arc-shaped top surface, the two sides of the top surface are provided with side cutting edges, and the width of the top surface is smaller than the width of the first crushing toothed plate.

[0013] In the moving toothed plate of the jaw crusher, the first crushing toothed plate has a semi-circular cross-section and the tooth peak height is greater than the thickness of the crushing toothed plate.

[0014] In the moving tooth plate for the jaw crusher, the crushing tooth base plate is symmetrically provided with a plurality of bolt through holes for connecting with the fixed frame. The bolt through holes penetrate the crushing tooth base plate and the fixed frame through the tooth peak of the first crushing tooth.

[0015] In the moving tooth plate of the jaw crusher, the fixed frame is symmetrically provided with a number of weight reduction grooves on the side opposite to the crushing tooth base plate, and the bolt through hole extends out from the bottom of the weight reduction groove.

[0016] The advantages of this utility model are: The crushing tooth base plate is longitudinally arranged with two types of crushing teeth with different tooth heights, which can handle materials with larger size differences. The more prominent crushing teeth have a stronger biting force and apply stress to harder materials to improve efficiency and make crushing more thorough. In addition, the higher tooth peaks have a stronger ability to maintain tooth shape, thereby delaying the replacement frequency of the tooth plate and effectively reducing the operating cost. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the side structure of the crushing tooth substrate of this utility model.

[0018] Figure 2 This is a schematic diagram of the fixed frame side structure of this utility model.

[0019] Figure 3 This is a side view of the structure of this utility model.

[0020] In the diagram, there is a fixed frame 1, a weight reduction groove 11, a crushing tooth base plate 2, a first crushing tooth 3, a second crushing tooth 4, an inclined transition surface 41, a top surface 42, a side cutting edge 43, and a bolt through hole 5. Detailed Implementation

[0021] The following are specific embodiments of the utility model, which are described in conjunction with the accompanying drawings to further illustrate the technical solution of the utility model. However, the utility model is not limited to these embodiments.

[0022] Example 1

[0023] like Figures 1-3 As shown, the moving tooth plate for a jaw crusher includes a fixed frame 1. A crushing tooth base plate 2 is detachably mounted on the fixed frame 1. Several parallel first crushing teeth 3 are longitudinally arranged on the side of the crushing tooth base plate 2 opposite to the fixed frame 1. On the same side of the first crushing teeth 3, second crushing teeth 4 with higher tooth peaks than the first crushing teeth 3 are also provided on the crushing tooth base plate 2. The spacing between adjacent second crushing teeth 4 is equal.

[0024] That is, a first crushing tooth 3 is longitudinally arranged on the detachable crushing tooth base plate 2, which forms a primary biting surface with the material to crush large pieces of ore for the first time. At the same time, a second crushing tooth 4 with a higher tooth peak is arranged on the crushing tooth base plate 2 to subject the blocky material after the first crushing to a second stress compression and shearing. This forms a stepped crushing plane on the tooth surface to enhance the local crushing capacity, making the tooth plate adapt to the crushing requirements of ores with different hardness, improving the crushing ratio and making the finished product particle size more uniform.

[0025] In this embodiment, the second crushing rack 4 is shorter than the first crushing rack 3 and is symmetrically arranged at the center of the crushing rack substrate 2.

[0026] The middle area of ​​the toothed plate is often where the material has a high bulk density. Setting a short toothed rack with a high tooth peak can process the central material more quickly. Therefore, setting a short toothed rack in the middle area of ​​the toothed plate can concentrate the crushing force on the main force zone, ensuring that the moving jaw forms a strong crushing effect in the most important middle crushing zone, and avoiding insufficient edge stress or uneven force due to an excessively long toothed rack.

[0027] In this embodiment, the tooth valleys of adjacent first crushing racks 3 are connected to each other, and the second crushing rack 4 is disposed on the tooth peak of the first crushing rack 3.

[0028] By placing the second rack directly on the peak of the first rack, the connection between the tooth valleys ensures the overall continuity of the rack, preventing material from getting stuck. The structural height of the first rack is fully utilized to form a localized enhanced crushing point, improving crushing efficiency and ensuring the flowability of material entering the channel.

[0029] In this embodiment, the two ends of the second crushing rack 4 are provided with inclined transition surfaces 41 that connect with the first crushing rack 3, and the inclined transition surfaces 41 form an obtuse angle with the tooth peaks of the first crushing rack 3.

[0030] The inclined transition surface 41 forms a gently sloping structure that ensures that the material can smoothly enter the tooth space during crushing, reducing the chipping of the tooth caused by the impact of the material and preventing hard ore from directly impacting the high tooth peak interface, thereby improving the wear resistance and structural safety of the tooth.

[0031] In this embodiment, the second crushing rack 4 has a trapezoidal cross section, and the tooth peak is provided with an arc-shaped top surface 42. The two sides of the top surface 42 are provided with side cutting edges 43, and the width of the top surface 42 is smaller than the width of the first crushing rack 3.

[0032] The second crushing rack 4 has a cross section that improves compressive strength and wear resistance. Because the moving jaw has lateral vibration, it generates transverse shear force on the material through the side cutting edge 43. The narrow top can concentrate pressure to form a local high stress zone to improve crushing efficiency.

[0033] In this embodiment, the first crushing rack 3 has a semi-circular cross-section, and the height of the tooth peak is greater than the thickness of the crushing tooth substrate 2.

[0034] The semi-circular shape provides optimal meshing and entry, while the arc-shaped contact reduces local stress concentration and extends the service life of the first crushing rack 3. At the same time, the high tooth peaks are beneficial for clamping large pieces of material for the first crushing.

[0035] In this embodiment, the crushing tooth base plate 2 is symmetrically provided with a plurality of bolt through holes 5 for connecting with the fixed frame 1. The bolt through holes 5 penetrate the crushing tooth base plate 2 and the fixed frame 1 through the tooth peak of the first crushing tooth 3.

[0036] Setting the bolt hole at the tooth peak can reduce the impact on the strength of the tooth valley area. The bolt is not exposed on the material contact surface to avoid wear, and the fixation is more secure and less prone to loosening.

[0037] In this embodiment, the fixed frame 1 is symmetrically provided with several weight-reducing grooves 11 on the side opposite to the crushing tooth base plate 2, and the bolt through holes 5 extend out from the bottom of the weight-reducing grooves 11.

[0038] By hollowing out the back of the fixed frame 1, the overall structural weight is reduced, while the air contact area is increased to facilitate the dissipation of heat from the toothed plate, and the installation of bolts also has a space for maintenance and concealment.

[0039] Example 2

[0040] The arrangement of the second crushing rack 4 in Embodiment 1 has been changed. The second crushing rack 4 is arranged in parallel between the adjacent first crushing racks 3, and the distance between the second crushing rack 4 and the two adjacent first crushing racks 3 is the same.

[0041] The first crushing rack 3 and the second crushing rack 4 are arranged in an alternating manner to form a crushing structure that is high in the middle and low on both sides. This structure is suitable for controlling the material discharge direction, and the crushed material is more likely to disperse to both sides, thus improving the discharge efficiency.

[0042] In this embodiment, the two ends of the second crushing rack 4 are provided with inclined transition surfaces 41 that connect with the crushing rack substrate 2, and the inclined transition surfaces 41 form an obtuse angle with the crushing rack substrate 2.

[0043] This reduces the pressure concentration of the material on the root of the second crushing rack 4, preventing stress concentration at the root from causing cracking.

[0044] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A moving toothed plate for a jaw crusher, comprising a fixed frame (1), characterized in that, The fixed frame (1) is detachably provided with a crushing tooth base plate (2). The crushing tooth base plate (2) is longitudinally provided with a plurality of parallel first crushing tooth bars (3) on one side opposite to the fixed frame (1). On the crushing tooth base plate (2) on the same side as the first crushing tooth bars (3), a second crushing tooth bar (4) with a tooth peak higher than the first crushing tooth bar (3) is also provided. The spacing between adjacent second crushing tooth bars (4) is equal.

2. The moving toothed plate for a jaw crusher according to claim 1, characterized in that, The second crushing rack (4) is shorter than the first crushing rack (3) and is symmetrically arranged at the center of the crushing rack substrate (2).

3. The moving toothed plate for a jaw crusher according to claim 2, characterized in that, The tooth valleys of adjacent first crushing racks (3) are connected to each other, and the second crushing rack (4) is disposed on the tooth peak of the first crushing rack (3).

4. The moving toothed plate for a jaw crusher according to claim 3, characterized in that, The second crushing rack (4) has inclined transition surfaces (41) at both ends that connect with the first crushing rack (3), and the inclined transition surfaces (41) form an obtuse angle with the tooth peaks of the first crushing rack (3).

5. The moving toothed plate for a jaw crusher according to claim 2, characterized in that, The second crushing rack (4) is arranged in parallel between the adjacent first crushing racks (3), and the distance between the second crushing rack (4) and the two adjacent first crushing racks (3) is the same.

6. The moving toothed plate for a jaw crusher according to claim 5, characterized in that, The second crushing rack (4) has inclined transition surfaces (41) at both ends that connect with the crushing tooth base plate (2), and the inclined transition surfaces (41) are at an obtuse angle to the crushing tooth base plate (2).

7. The moving toothed plate for a jaw crusher according to claim 1, characterized in that, The second crushing rack (4) has a trapezoidal cross section and an arc-shaped top surface (42) on the tooth peak. The top surface (42) has side cutting edges (43) on both sides. The width of the top surface (42) is smaller than the width of the first crushing rack (3).

8. The moving toothed plate for a jaw crusher according to claim 1, characterized in that, The first crushing rack (3) has a semi-circular cross section and the height of the tooth peak is greater than the thickness of the crushing tooth base plate (2).

9. The moving toothed plate for a jaw crusher according to claim 1, characterized in that, The crushing tooth base plate (2) is symmetrically provided with a plurality of bolt through holes (5) for connecting with the fixed frame (1). The bolt through holes (5) penetrate the crushing tooth base plate (2) and the fixed frame (1) through the tooth peak of the first crushing tooth (3).

10. The moving toothed plate for a jaw crusher according to claim 9, characterized in that, The fixed frame (1) is symmetrically provided with several weight-reducing grooves (11) on the side opposite to the broken tooth base plate (2), and the bolt through hole (5) extends out from the bottom of the weight-reducing groove (11).

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