An integrated crushing knife for a dry granulator

Abstract

The present invention discloses an integrated crushing blade for a dry granulator, comprising a drive shaft and a crushing blade mounted on the drive shaft. The drive shaft comprises a fixed connection portion, a power transmission portion, and a tool mounting portion, which are sequentially arranged. The crushing blade comprises a crushing blade body and a crushing blade mounted on the crushing blade body. The center of the crushing blade body is provided with a first mounting hole and a second mounting hole connected to the first mounting hole, which are sequentially formed along the axial direction. The first mounting hole cooperates with the fixed connection portion for connecting the drive shaft to the crushing blade, and the second mounting hole cooperates with the power transmission portion for transmitting power between the drive shaft and the crushing blade. The present invention has the beneficial effects of a simple structure, a rational design, reduced operator labor intensity, and guaranteed product quality.

Description

Technical Field

[0001] The invention relates to the technical field of dry granulator cutters, and in particular to an integrated crushing cutter of a dry granulator. Background Art

[0002] Crushing mechanisms driven by drive shafts are common in industrial production. However, in pharmaceutical production, the special properties of some materials require frequent replacement or cleaning of the crushing blades. During installation, the concentricity between the crushing blade and the drive shaft is difficult to determine, making installation difficult and impacting work efficiency. Currently, most industrial installation mechanisms use keyed connections or chamfered mounting mechanisms for centering. These mechanisms connect the crushing blade to the drive shaft via a key, allowing the drive shaft to drive the crushing blade. Chamfers are also added to increase concentricity and reduce runout. These methods result in a large number of assembled parts, low installation precision, and increased labor intensity for operators. Summary of the Invention

[0003] In order to solve the problems existing in the prior art, the present invention provides an integrated crushing knife for a dry granulator with a reasonable structural design.

[0004] The technical solutions of the present invention are as follows:

[0005] An integrated crushing knife of a dry granulator is characterized in that it includes a transmission shaft and a crushing knife arranged on the transmission shaft, the transmission shaft includes a fixed connection part, a power transmission part and a tool mounting part arranged in sequence, the crushing knife includes a crushing knife body and a crushing knife blade arranged on the crushing knife body, the center of the crushing knife body is sequentially opened with a first mounting hole and a second mounting hole connected to the first mounting hole along the axial direction, the first mounting hole cooperates with the fixed connection part for connecting the transmission shaft and the crushing knife, and the second mounting hole cooperates with the power transmission part for power transmission between the transmission shaft and the crushing knife.

[0006] Furthermore, the fixed connection portion is provided with an external thread, the inner wall of the first mounting hole is provided with an internal thread, and the first mounting hole is threadedly matched with the fixed connection portion.

[0007] Furthermore, the outer surface of the power transmission part is a conical surface, and the second mounting hole is a conical hole, and the taper of the conical hole matches that of the conical surface.

[0008] Furthermore, a jump groove is provided between the fixed connection part and the power transmission part.

[0009] Furthermore, a limiting convex ring is provided between the power transmission part and the tool mounting part.

[0010] Furthermore, a first square rear root groove is provided on the crushing knife body in the circumferential direction away from one end of the transmission shaft.

[0011] Furthermore, the tool mounting portion of the transmission shaft is circumferentially provided with a second square rear root groove.

[0012] Furthermore, the internal thread provided on the inner wall of the first mounting hole is a forward thread, and the forward thread is opposite to the driving direction of the crushing knife; the external thread of the fixed connection part is a reverse thread.

[0013] Furthermore, the crushing knife body and the crushing knife blade are integrally formed.

[0014] Furthermore, the tapers of the conical surface and the conical hole both adopt Jag taper.

[0015] The beneficial effects of the present invention are: simple structure, reasonable design, reduced labor intensity of operators, and guaranteed product quality; self-centering and self-locking capabilities are generated by combining the same Jag cone surface on the crushing cutter and the drive shaft with the positive and negative thread interlocking connection, which can effectively convert resistance into locking force while increasing the friction force of the Jag cone surface, utilizing the friction of the Jag cone surface to achieve the purpose of transmission, and avoiding the crushing cutter and the drive shaft from separating and falling off due to vibration generated during the rotation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall front structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the crushing knife of the present invention;

[0019] Figure 4 It is a schematic diagram of the transmission shaft structure of the present invention;

[0020] In the figure: 1-crushing knife, 101-first mounting hole, 102-second mounting hole, 103-first square rear root groove, 104-crushing knife body, 2-drive shaft, 201-power transmission part, 202-jump groove, 203-fixed connection part, 204-second square rear root groove, 205-limiting convex ring, 206-tool mounting part. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] like Figure 1-4As shown, an integrated crushing knife of a dry granulator includes a crushing knife 1, a first mounting hole 101, a second mounting hole 102, a first square rear root groove 103, a crushing knife body 104, a transmission shaft 2, a power transmission part 201, a jump layer groove 202, a fixed connection part 203, a second square rear root groove 204, a limiting protrusion ring 205 and a tool mounting part 206.

[0023] Example:

[0024] The integrated crushing knife of the dry granulator comprises a transmission shaft 2 and a crushing knife 1 arranged on the transmission shaft 2.

[0025] The transmission shaft 2 includes a fixed connection part 203, a power transmission part 201 and a tool mounting part 206 which are arranged in sequence. The crushing knife 1 includes a crushing knife body 104 and a crushing knife blade 105 arranged on the crushing knife body 104. The crushing knife body 104 and the crushing knife blade 105 are integrally formed; the center of the crushing knife body 104 is sequentially provided with a first mounting hole 101 and a second mounting hole 102 connected to the first mounting hole 101 in the axial direction. The first mounting hole 101 cooperates with the fixed connection part 203 for connecting the transmission shaft 2 and the crushing knife 1. The second mounting hole 102 cooperates with the power transmission part 201 for power transmission between the transmission shaft 2 and the crushing knife 1.

[0026] The fixed connection part 203 is provided with an external thread, the inner wall of the first mounting hole 101 is provided with an internal thread, and the first mounting hole 101 is threadedly matched with the fixed connection part 203. Specifically, in this embodiment, the internal thread provided on the inner wall of the first mounting hole 101 is a forward thread, and the forward thread is opposite to the driving direction of the crushing knife 1; the external thread of the fixed connection part 203 is a reverse thread.

[0027] The outer surface of the power transmission unit 201 is a conical surface, and the second mounting hole 102 is a conical hole, with the taper of the conical surface matching that of the second mounting hole. Both the conical surface and the hole adopt a Jagger taper, also known as a Jagger taper. The tight fit and friction between the conical surface and the hole achieves transmission between the drive shaft 2 and the crushing blade 1, while also providing a certain degree of mechanical sealing and dust prevention. Furthermore, the unit can be immersed for cleaning, eliminating dead angles and facilitating assembly and disassembly.

[0028] A jump groove 202 is provided between the fixed connection part 203 and the power transmission part 201 to prevent the thread from locking; because if there is no jump groove 202, the internal thread of the first mounting hole 101 will contact the power transmission part 201, which will cause the thread to lock and is not easy to disassemble.

[0029] A limiting convex ring 205 is provided between the power transmission part 201 and the tool installation part 206 . The limiting convex ring 205 can contact the end of the crushing knife 1 and is used for installation and positioning of the transmission shaft 2 .

[0030] A first square rear root groove 103 is provided on the crushing knife body 104 in the circumferential direction away from one end of the transmission shaft 2; a second square rear root groove 204 is provided in the circumferential direction of the tool mounting portion 206 of the transmission shaft 2. The arrangement of the first square rear root groove 103 and the second square rear root groove 204 facilitates the direct disassembly of the crushing knife 1 and the transmission shaft 2 by using tools.

[0031] Working process:

[0032] The crushing blade is installed directly onto the drive shaft. First, tighten the drive shaft with a tool, then roughly align the Jag cones on the drive shaft and the crushing blade. Manually push the crushing blade in, centering it with the Jag cone on the drive shaft. Then, tighten manually in the screw direction. The crushing blade has the same Jag cone inside as the drive shaft, and the threads are threaded in the opposite direction of the drive shaft. The resistance generated during rotation automatically locks the crushing blade in place. The friction between the Jag cones drives the crushing blade, achieving rotation. The greater the resistance, the stronger the locking force, the greater the friction, and the greater the torque transmitted.

Claims

1. An integrated crushing knife for a dry granulator, characterized in that: The invention comprises a transmission shaft (2) and a crushing knife (1) arranged on the transmission shaft (2), wherein the transmission shaft (2) comprises a fixed connection portion (203), a power transmission portion (201) and a tool installation portion (206) arranged in sequence, and the crushing knife (1) comprises a crushing knife body (104) and a crushing knife blade (105) arranged on the crushing knife body (104), and the center of the crushing knife body (104) is provided with a first mounting hole (101) and a second mounting hole (102) connected to the first mounting hole (101) in sequence along the axial direction, the first mounting hole (101) cooperates with the fixed connection portion (203) and is used for connecting the transmission shaft (2) and the crushing knife (1), and the second mounting hole (102) cooperates with the power transmission portion (201) and is used for power transmission between the transmission shaft (2) and the crushing knife (1); The fixed connection portion (203) is provided with an external thread, the inner wall of the first mounting hole (101) is provided with an internal thread, and the first mounting hole (101) and the fixed connection portion (203) are threadedly engaged; The outer surface of the power transmission portion (201) is a conical surface, and the second mounting hole (102) is a conical hole, and the taper of the conical hole matches that of the conical surface; A jump groove (202) is provided between the fixed connection part (203) and the power transmission part (201); The internal thread provided on the inner wall of the first mounting hole (101) is a forward thread, and the forward thread is opposite to the driving direction of the crushing knife (1); the external thread of the fixed connection part (203) is a reverse thread; The tapers of the conical surface and the conical hole both adopt Jag taper.

2. The integrated crushing blade of a dry granulator according to claim 1, characterized in that: A limiting convex ring (205) is provided between the power transmission portion (201) and the tool mounting portion (206).

3. The integrated crushing blade of a dry granulator according to claim 1, characterized in that: A first square rear root groove (103) is provided on the crushing knife body (104) in the circumferential direction away from one end of the transmission shaft (2).

4. The integrated crushing blade of a dry granulator according to claim 1, characterized in that: The tool mounting portion (206) of the transmission shaft (2) is circumferentially provided with a second square rear root groove (204).

5. The integrated crushing blade of a dry granulator according to claim 1, characterized in that: The crushing knife body (104) and the crushing knife blade (105) are integrally formed.

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