Grain crushing roller

Abstract

The utility model relates to a kind of grain crushing roller, comprising: roller body;Roller sleeve, the roller sleeve is detachably connected on roller body, several rows of crushing teeth are provided on the roller sleeve, the crushing tooth includes tooth root and protruding part, the protruding part is located above tooth root, the both sides of the protruding part are respectively equipped with inclined plane one, the top of the protruding part is provided with blade edge, one end of the blade edge is provided with inclined plane two, the inclined plane two is towards the direction of rotation of roller body, the utility model has the advantages of optimizing shape design, under the premise of guaranteeing crushing effect, maximum degree reduces tip and the edge of tip, reduces tip stress concentration situation, is favorable to improve service life.

Description

Technical Field

[0001] This utility model relates to the field of grain crusher parts, and in particular to a grain crushing roller. Background Technology

[0002] A grain crusher is an agricultural product processing device that breaks down different grains such as corn, wheat, and rice into particles of varying fineness. The mainstream grain crusher is the roller crusher, which relies on multiple pairs of toothed extrusion rollers to squeeze and grind the grain particles.

[0003] Currently, the mainstream roller crusher uses toothed crushing rollers, with a structure and shape similar to the crushing roller disclosed in CN106040352A - Crushing Rollers for Crushers. The outermost ends of the teeth of the crushing roller have outwardly curved tips. These tips contact the grain particles, making this the most stress-concentrated area. The high-speed rotating tooth tips and grain particles experience instantaneous impacts. Due to the small contact area between the tips and grain particles, the localized pressure is high. Repeated impacts can easily cause cracks at the tips, affecting the service life.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] In view of the shortcomings of the existing technology, this utility model discloses a grain crushing roller.

[0006] A grain crushing roller includes: a roller body; a roller sleeve, the roller sleeve being detachably connected to the roller body, the roller sleeve having a plurality of rows of crushing teeth, each crushing tooth having a tooth root and a protrusion, the protrusion being located above the tooth root, each protrusion having an inclined surface on both sides, the top of the protrusion having a cutting edge, and one end of the cutting edge having an inclined surface facing the rotation direction of the roller body.

[0007] Furthermore, the tilt angle of the first tilted surface ranges from 37° to 46°.

[0008] Furthermore, the tilt angle of the second tilted surface ranges from 54 to 69°.

[0009] Furthermore, a transition fillet is provided between the inclined surface and the cutting edge.

[0010] Furthermore, the radius of the transition fillet ranges from 3 to 6 mm.

[0011] Furthermore, grooves are provided between the crushing teeth, and the groove surface is an arc-shaped surface.

[0012] Furthermore, the surface of the roller body is provided with a keyway one along the axial direction, the inner wall surface of the roller sleeve is provided with a keyway two along the axial direction, and a fixing key is provided between the roller body and the roller sleeve, the fixing key being placed in keyway one and keyway two.

[0013] Furthermore, a pair of retaining rings are provided on the roller body.

[0014] Furthermore, the fixed ring has connecting parts at both ends, with threaded holes in the connecting parts. The fixed ring is provided with locking studs, which pass through the threaded holes of the two connecting parts to connect the two connecting parts into one.

[0015] Furthermore, a keyway three is formed on the inner wall of the fixing ring. When the fixing ring is fixed on the outer side of both ends of the roller sleeve, the fixing key is located in the keyway three.

[0016] Technical effects of this utility model: 1. The grain crushing roller rotates and crushes grain particles by contacting the crushing teeth. During the crushing process, the grain particles first come into contact with the inclined surface two of the protrusion. Then, the grain particles move upward along the inclined surface two and come into contact with the cutting edge. There are no sharp points on the inclined surface two to avoid excessive local pressure. The inclined surface of the protrusion also serves as a transition between the root of the tooth and the cutting edge, avoiding the formation of near right angle edges between the two. This shape design minimizes sharp points and edges while ensuring the crushing effect, reducing stress concentration at the sharp points and thus improving service life.

[0017] 2. Strictly control the tilt angles of inclined surface one and inclined surface two to effectively distribute the load and avoid excessive force in one direction. The protruding part of the alloy balance crushing tooth is stressed, which helps to extend its service life.

[0018] 3. A transition fillet is used between the inclined surface and the cutting edge, and the radius of the transition fillet is strictly controlled to reduce the appearance of sharp edges and avoid excessive stress concentration at that point.

[0019] 4. The bottom of the fixing key is located in keyway one, and the top of the fixing key is located in keyway two. The fixing key prevents the roller sleeve from rotating axially, and the fixing ring is clamped at both ends of the roller sleeve to prevent the roller sleeve from moving axially. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the exploded structure of a grain crushing roller.

[0021] Figure 2 This is a front view schematic diagram of the bushing structure.

[0022] In the diagram: 1. Roller body; 11. Keyway 1; 2. Roller sleeve; 21. Keyway 2; 22. Crushing tooth; 221. Tooth root; 222. Protrusion; 223. Inclined surface 1; 224. Transition fillet; 225. Cutting edge; 226. Inclined surface 2; 23. Tooth groove; 3. Fixing key; 4. Fixing ring; 41. Locking stud; 42. Keyway 3; 43. Connecting part. Detailed Implementation

[0023] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0024] Example 1: A grain crushing roller, such as Figure 1 As shown, Figure 1 This is an exploded structural diagram of a grain crushing roller, including a roller body 1 and a roller sleeve 2. The roller sleeve 2 is detachably connected to the roller body 1 and has several crushing teeth 22. During operation, the grain crushing roller is installed in a grain crusher. A motor provides power to drive the roller body 1 to rotate, and the roller sleeve 2 rotates synchronously with the roller body 1, so that the crushing teeth 22 contact and crush the grain particles.

[0025] like Figure 1 As shown, a keyway 11 is formed on the surface of the roller body 1. The keyway 11 is located in the middle of the roller body 1 and is arranged along the axial direction of the roller body 1.

[0026] like Figure 1 As shown, the inner wall surface of the roller sleeve 2 is provided with a keyway 21 along the axial direction, and the keyway 21 is arranged along the axial direction of the roller sleeve 2.

[0027] like Figure 1 As shown, a fixing key 3 is provided between the roller body 1 and the roller sleeve 2. The bottom of the fixing key 3 is in the keyway 11, and the top of the fixing key 3 is located in the keyway 21. When the roller body 1 and the roller sleeve 2 rotate relative to each other, the fixing key 3 prevents the roller sleeve 2 from rotating. During the installation of the roller body 1 and the bushing, the fixing key 3 is first inserted into the keyway 11. At this time, the upper part of the fixing key 3 protrudes from the surface of the roller body 1. The operator aligns the keyway 21 with the fixing key 3 and then puts the bushing on the roller body.

[0028] like Figure 1As shown, a pair of retaining rings 4 are installed on the roller body 1, and the retaining rings 4 are fitted onto the roller body 1. Connecting portions 43 are provided at both ends of the retaining rings 4, and threaded holes are opened in the connecting portions 43. Locking studs 41 are provided on the retaining rings 4, passing through the threaded holes of the two connecting portions 43, connecting the two connecting portions 43 into one unit. A keyway 3 42 is provided on the inner wall of the retaining rings 4. When the retaining rings 4 are fixed in the designed position, the retaining key 3 is located in the keyway 3 42. During the installation of the retaining rings 4, first, the retaining rings 4 are fitted onto the shaft body, and then the retaining rings 4 are moved inward. When the retaining rings 4 are in contact with the end face of the shaft sleeve, the operator rotates the locking studs 41, the connecting portions 43 are engaged, the retaining rings 4 lock the shaft body, and the retaining rings 4 prevent the shaft sleeve from moving axially.

[0029] Combination Figure 1 and Figure 2 As shown, Figure 2 This is a front view schematic diagram of the bushing structure. Several rows of crushing teeth 22 are provided on the roller sleeve 2, and each row of crushing teeth 22 is evenly arranged along the circumference of the roller sleeve 2. The crushing teeth 22 include a tooth root 221 and a protrusion 222, with the protrusion 222 located above the tooth root 221.

[0030] Combination Figure 1 and Figure 2 As shown, a tooth groove 23 is provided between adjacent tooth roots 221. The groove surface of the tooth groove 23 is an arc-shaped surface to avoid sharp edges and reduce stress concentration at the edge of the groove surface of the tooth groove 23.

[0031] Combination Figure 1 and Figure 2 As shown, the top of the protrusion 222 is provided with a cutting edge 225. During operation, the cutting edge 225 contacts the grain particles to complete the crushing work. One end of the cutting edge 225 is provided with an inclined surface 226, which faces the rotation direction of the roller body 1. The inclination angle of the inclined surface 226 is in the range of 54~69°, and the inclination angle is the angle between the inclined surface and the normal of the circularity circle of the inclined surface. During operation, the roller body 1 and the bushing rotate counterclockwise synchronously. The inclined surface 226 contacts the high-speed moving grain particles. The grain particles move upward along the inclined surface 226 towards the cutting edge 225. Furthermore, there are no sharp points on the inclined surface 226, so there will be no situation where the grain particles collide with sharp points, resulting in excessive pressure and cracks at the sharp points.

[0032] Combination Figure 1 and Figure 2As shown, inclined surfaces 223 are provided on both sides of the protrusion 222, with an inclination angle ranging from 37° to 46°. During high-speed rotation of the shaft, the inclined surfaces 223 come into contact with the grain particles, and the load acts on them, keeping the inclination angle within a reasonable range to avoid excessive normal force on the inclined surfaces 223 and maintain a balanced force state. A transition fillet 224 is provided between the inclined surfaces 223 and the cutting edge 225, with a radius ranging from 3 to 6 mm, to prevent sharp edges from appearing at the edge of the cutting edge 225 and reduce excessive stress concentration caused by material collision and sharp edges.

[0033] Specific working materials: First, the grain crushing roller is assembled. The worker inserts the fixing key 3 into the keyway 11, then aligns the keyway 21 of the bushing with the fixing key 3, and pushes the bushing into the middle position of the shaft body along the axial direction. After reaching the designed installation position, the two fixing rings 4 are respectively fitted into the two ends of the shaft body. Then, the fixing rings 4 are rotated and adjusted to align the keyway 3 42 with the fixing key 3. Then, the fixing rings 4 are pushed in to make them fit against the end face of the bushing. Finally, the locking stud 41 is rotated, the connecting part 43 fits, and the fixing rings 4 lock the shaft body, completing the fixation of the bushing and preventing it from moving axially.

[0034] Then, several grain crushing rollers are installed in the grain crusher. The grain crushing rollers rotate, and the grain particles are crushed by the crushing teeth 22 of the multiple grain crushing rollers. During the crushing process, the inclined surface 226 comes into contact with the high-speed moving grain particles. The grain particles move upward along the inclined surface 226 toward the cutting edge 225. The grain particles are mainly crushed at the cutting edge 225. Furthermore, there are no sharp points on the inclined surface 226 to avoid stress concentration at the sharp points caused by collision.

[0035] Finally, when performing equipment maintenance after the crushing work is completed, remove the grain crushing roller, then rotate the locking stud 41 in the reverse direction to release the retaining ring 4, and then remove the retaining ring 4, bushing, and retaining key 3 in reverse order. This makes it easy and quick to complete the equipment replacement and maintenance work.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A grain crushing roller, characterized in that, include: Roller body; A roller sleeve is detachably connected to the roller body. The roller sleeve is provided with several rows of crushing teeth. Each crushing tooth includes a tooth root and a protrusion. The protrusion is located above the tooth root. An inclined surface is provided on each side of the protrusion. A cutting edge is provided on the top of the protrusion. An inclined surface is provided at one end of the cutting edge. The inclined surface is oriented towards the rotation direction of the roller body.

2. The grain crushing roller according to claim 1, characterized in that: The tilt angle of the first inclined surface is in the range of 37~46°.

3. A grain crushing roller according to claim 1, characterized in that: The tilt angle of the second tilted surface ranges from 54° to 69°.

4. A grain crushing roller according to claim 1, characterized in that: A transition fillet is provided between the inclined surface and the cutting edge.

5. A grain crushing roller according to claim 4, characterized in that: The radius of the transition fillet ranges from 3 to 6 mm.

6. A grain crushing roller according to claim 1, characterized in that: The pulverizing teeth are provided with tooth grooves, and the groove surface is an arc-shaped surface.

7. A grain crushing roller according to claim 1, characterized in that: The surface of the roller body is provided with a keyway 1 along the axial direction, and the inner wall surface of the roller sleeve is provided with a keyway 2 along the axial direction. A fixing key is provided between the roller body and the roller sleeve, and the fixing key is placed in the keyway 1 and the keyway 2.

8. A grain crushing roller according to claim 7, characterized in that: A pair of retaining rings are installed on the roller body.

9. A grain crushing roller according to claim 8, characterized in that: The fixed ring has connecting parts at both ends, with threaded holes in the connecting parts. The fixed ring is provided with locking studs, which pass through the threaded holes of the two connecting parts to connect the two connecting parts into one.

10. A grain crushing roller according to claim 9, characterized in that: The inner wall of the fixing ring has a keyway three. When the fixing ring is fixed on the outer side of both ends of the roller sleeve, the fixing key is located in the keyway three.

Images