Round nut locking device

Abstract

The utility model relates to a round nut locking device, and relates to the field of crusher cutter connecting structures, the round nut locking device comprises a main shaft, a plurality of cutters, a flat key and a round nut, the main shaft is provided with a thread part, the center of each cutter is provided with a connecting hole, the main shaft is inserted into the connecting hole, the round nut is in threaded connection with the thread part, and the round nut is used for abutting against the end face of the cutter; the flat key can be continuously connected to the main shaft and is used for abutting against the end face of the side, away from the cutter, of the round nut. The device has the effect of improving the position stability of the cutter on the main shaft.

Description

Technical Field

[0001] This application relates to the field of crusher tool connection structures, and in particular to a round nut locking device. Background Technology

[0002] A shredder is a machine used for coarse crushing, processing unprocessed raw materials or scraps, and is widely used in the recycling industry. The shredder uses a motor to drive the main shaft, which in turn causes the cutter disc on the main shaft to rotate, thus cutting the material.

[0003] The relevant shredder actuator includes a main shaft and a cutter disc. A through hole is provided in the center of the cutter disc, and the main shaft is inserted into the through hole so that the cutter disc can be installed on the main shaft. An external thread is provided on the main shaft, and a round nut is connected to the external thread. The round nut is used to abut against the surface of the cutter, so that the cutter can be kept fixed on the main shaft and reduce the probability of the cutter sliding along the length of the main shaft.

[0004] The aforementioned technical solutions have the following drawbacks: the position of the cutter on the spindle is fixed by a round nut, and the round nut is difficult to fix the cutter after deformation, resulting in low safety of the shredder. Utility Model Content

[0005] To improve the positional stability of the cutting tool on the spindle, this application provides a round nut locking device.

[0006] The round nut locking device provided in this application adopts the following technical solution:

[0007] A round nut locking device includes a spindle, multiple cutting tools, a flat key, and a round nut. The spindle has a threaded portion, and the cutting tools have a connecting hole at their center. The spindle is inserted into the connecting hole. The round nut is threaded onto the threaded portion and is used to abut against the end face of the cutting tool. The flat key is continuously connected to the spindle and is used to abut against the end face of the round nut away from the cutting tool.

[0008] By adopting the above technical solution, multiple cutting tools are set on the spindle, and round nuts are set at the ends of the cutting tools. The round nuts can be fixed to the spindle by threads and bear stress. When the cutting tool is subjected to stress along the length of the spindle, the cutting tool can be stuck on the round nut, thereby keeping the cutting tool fixed on the spindle. A flat key is set on one side of the round nut. The flat key is detachably connected to the spindle by fixing bolts. The flat key can hold the round nut, thereby improving the limiting effect of the round nut on the cutting tool. When the round nut is disconnected from the threaded part, the round nut can also limit the cutting tool under the support of the flat key, thereby improving the positional stability of the cutting tool on the spindle.

[0009] Optionally, the spindle includes a connecting part, which is coaxially connected to the threaded part, and the cross-section of the connecting part is a regular polygon.

[0010] By adopting the above technical solution, a connecting part is formed on the spindle, which can be inserted into the connecting hole of the tool, and the tool is then mounted on the connecting part. The cross-section of the connecting part is a non-circular shape, and the tool is engaged with the connecting part. When the tool cuts the material, even if the round nut is loose, the tool remains fixed on the spindle, which reduces the probability of the tool rotating on the spindle, thereby enabling the tool to stably cut the material.

[0011] Optionally, the edges of the connecting prism are rounded.

[0012] By adopting the above technical solution, and by opening rounded corners on the connecting part, the stress distribution on the connecting part and the cutting tool is made uniform. When the cutting tool cuts the material, the stress concentration on the connecting part and the cutting tool can be reduced, thereby reducing the wear on the connecting part and the cutting tool, and ensuring that the cutting tool and the connecting part can always maintain a locking connection.

[0013] Optionally, the cutting tool is provided with multiple cutting edges, which are equidistantly spaced along the circumferential direction on the cutting tool, and the number of cutting edges is the same as the number of sides of the regular polygon formed by the cross-section of the connecting part.

[0014] By adopting the above technical solution, and by making the number of cutting edges correspond to the cross-sectional shape of the connecting hole, when the tool rotates with the spindle and cuts the material, the cutting edges at different positions on the tool come into contact with the material. The stress distribution on the tool is different when different cutting edges come into contact with the material. When the tool rotates at high speed, multiple cutting edges are subjected to force evenly, thereby making the stress distribution on the tool uniform.

[0015] Optionally, multiple tools are staggered on the spindle, with adjacent tools arranged at an angle to each other.

[0016] By adopting the above technical solution and setting multiple cutters on the connecting part, the coverage area of ​​the cutters when they rotate is larger, enabling them to cut larger materials. The two adjacent cutters are set at an angle, and the user can install the adjusted cutter on the connecting part by rotating the cutter around the center of the circle at a certain angle, which is convenient for use.

[0017] Optionally, the spindle is provided with multiple spacers, each spacer having a disc structure and a mounting hole at its center. The connecting part is inserted into the mounting hole, and the shape of the mounting hole corresponds to the cross-section of the connecting part. The spacers are positioned between two adjacent cutting tools.

[0018] By adopting the above technical solution, by setting a spacer on the spindle, the spacer can be locked between two adjacent cutters, thereby allowing the two adjacent cutters to be spaced apart and fixed on the spindle. When the cutter cuts the material, the shredded material can fall from the space between the cutters.

[0019] Optionally, the flat key is configured as a plurality of flat keys, which are arranged at equal intervals along the circumferential direction of the main shaft.

[0020] By adopting the above technical solution, multiple flat keys are set on the spindle so that they all abut against the round nut. When the tool is subjected to stress along the length of the spindle, the multiple flat keys share the force and support the round nut, thereby making the stress distribution on the round nut uniform and reducing the probability of stress concentration and deformation on the round nut.

[0021] Optionally, the main shaft is provided with multiple mounting slots, which are blind slots. Each mounting slot contains a flat key that extends out of the mounting slot and abuts against a round nut.

[0022] By adopting the above technical solution, multiple mounting slots are opened on the spindle, allowing the flat key to be inserted into the mounting slot and engaged with the round nut. When the flat key becomes loose between itself and the spindle, the flat key can still be squeezed by the round nut and the inner wall of the mounting slot and remain stationary in the mounting slot, thereby improving the flat key's ability to limit the round nut.

[0023] In summary, the beneficial technical effects of this application are as follows:

[0024] 1. By setting multiple cutters on the spindle and setting round nuts at the ends of the cutters, the round nuts can be fixed to the spindle by threads and bear stress. When the cutter is subjected to stress along the length of the spindle, the cutter can be locked onto the round nut, thereby keeping the cutter fixed on the spindle. A flat key is set on one side of the round nut. The flat key is detachably connected to the spindle by fixing bolts. The flat key can lock the round nut, thereby improving the limiting effect of the round nut on the cutter. When the round nut is disconnected from the threaded part, the round nut can also limit the cutter under the support of the flat key, thereby improving the positional stability of the cutter on the spindle.

[0025] 2. By machining a connecting part on the spindle, the connecting part can be inserted into the connecting hole of the tool, and the tool can be mounted on the connecting part. The cross-section of the connecting part is a non-circular shape. The tool is snapped into the connecting part. When the tool cuts the material, even if the round nut is loose, the tool will remain fixed on the spindle, which can reduce the probability of the tool rotating on the spindle, and thus enable the tool to cut the material stably.

[0026] 3. By opening multiple mounting slots on the spindle, the flat key is inserted into the mounting slot and engaged with the round nut. When the flat key becomes loose between itself and the spindle, the flat key can still be squeezed by the round nut and the inner wall of the mounting slot and remain stationary in the mounting slot, thereby improving the flat key's ability to limit the round nut. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application. Figure 1 .

[0028] Figure 2 This is a schematic diagram of the overall structure of an embodiment of this application. Figure 2 .

[0029] Figure 3 This is a schematic diagram of the main shaft structure according to an embodiment of this application.

[0030] Figure 4 This is a schematic diagram of the spacer structure according to an embodiment of this application.

[0031] Figure 5 This is a schematic diagram of the installation position of the flat key according to an embodiment of this application.

[0032] Reference numerals: 1. Spindle; 11. Connecting part; 12. Threaded part; 121. Mounting groove; 2. Cutting tool; 21. Connecting hole; 22. Cutting edge; 3. Spacer; 31. Mounting hole; 4. Flat key; 41. Fixing bolt; 5. Round nut. Detailed Implementation

[0033] The present application will be further described in detail below with reference to the accompanying drawings.

[0034] This application discloses a round nut locking device, referring to... Figure 1 and Figure 2 The device includes a spindle 1, multiple cutting tools 2, a flat key 4, and a round nut 5. The spindle 1 includes a connecting part 11 and a threaded part 12. The cutting tools 2 are mounted on the connecting part 11, and the round nut 5 is threaded onto the threaded part 12. The round nut 5 is used to abut against the surface of the cutting tool 2, thereby stabilizing the position of the cutting tool 2 on the connecting part 11 and reducing the probability of the cutting tool 2 sliding along the length direction of the spindle 1. The flat key 4 is detachably connected to the spindle 1 and is used to abut against the round nut 5. When the cutting tool 2 is subjected to stress, the cutting tool 2 applies stress to the round nut 5, and the flat key 4 plays the role of supporting the round nut 5, which can reduce the probability of the round nut 5 disengaging from the threaded part 12 and improve the positional stability of the cutting tool 2 on the spindle 1.

[0035] Reference Figure 3 The connecting part 11 is configured as a prism structure with a regular polygonal cross-section. The cutter 2 is a cutter head with a connecting hole 21 at its center. The shape of the connecting hole 21 is the same as the cross-section of the connecting part 11. After the connecting part 11 is inserted into the connecting hole 21 of the cutter 2, the cutter 2 is locked in place with the connecting part 11. When the spindle 1 rotates, the cutter 2 can rotate with the spindle 1 and cut the object. When the connection between the cutter 2 and the spindle 1 becomes loose, the cutter 2 can still be fixed by the locking of the connecting part 11, reducing the probability of the cutter 2 rotating on the spindle 1.

[0036] Reference Figure 4Multiple cutting tools 2 are spaced apart on the connecting part 11. A spacer 3 is provided between two adjacent cutting tools 2. The spacer 3 is a circular sleeve and is fitted onto the main shaft 1. A mounting hole 31 is provided at the center of the spacer 3. The shape of the mounting hole 31 is the same as the cross-section of the connecting part 11. The diameter of the spacer 3 is smaller than the diameter of the cutting tool 2. The two end faces of the spacer 3 abut against two adjacent cutting tools 2 respectively, so that the adjacent cutting tools 2 are spaced apart. When the main shaft 1 drives the multiple cutting tools 2 to rotate, the cutting tools 2 break the material. The broken fragments can fall through the gaps between the cutting tools 2.

[0037] Reference Figure 1 and Figure 2 In this embodiment, the cutting tool 2 is provided with multiple cutting edges 22, the number of which is the same as the number of sides of the cross-section of the connecting part 11. The multiple cutting edges 22 are arranged at equal intervals along the circumference of the cutting tool 2. When the spindle 1 drives the connecting part 11, which is a prism with a regular hexagonal cross-section, rounded corners are formed between adjacent sides of the hexagon to reduce stress concentration on the connecting part 11 and the cutting tool 2. When the spindle 1 rotates and the cutting tool 2 performs cutting operations, the stress on the cutting tool 2 is concentrated at the edges of the connecting part 11, leading to more severe wear on both the connecting part 11 and the cutting tool 2. By forming rounded corners, the service life of the spindle 1 and the cutting tool 2 can be improved.

[0038] Reference Figure 1 and Figure 2 Multiple cutting tools 2 are arranged at an angle relative to each other on the spindle 1. When multiple cutting tools 2 are mounted on the spindle 1, the cutting tools 2 rotate sequentially by a certain angle and are mounted on the connecting part 11, thereby setting adjacent cutting tools 2 at an angle. By staggering the cutting edges 22 of the multiple cutting tools 2, the cutting effect of the multiple cutting tools 2 on the object can be further improved.

[0039] Reference Figure 5 The threaded portion 12 is coaxially connected to the connecting portion 11, and the diameter of the threaded portion 12 is smaller than the inner diameter of the connecting portion 11. Two round nuts 5 are provided, and both round nuts 5 are threadedly connected to the threaded portion 12. The two round nuts 5 abut against each other on the threaded portion 12 and support the tool 2 through the spacer 3, so that the tool 2 is kept fixed on the connecting portion 11.

[0040] Reference Figure 5A fixing bolt 41 is provided on the flat key 4, and a threaded hole is provided on the spindle 1. The fixing bolt 41 passes through the flat key 4 and connects to the threaded hole of the spindle 1. The length direction of the fixing bolt 41 points towards the axis of the spindle 1. There are multiple flat keys 4, and each flat key 4 is connected to the spindle 1 by a fixing bolt 41. The multiple flat keys 4 are arranged at equal intervals along the circumference of the spindle 1. The multiple flat keys 4 provide support for the round nut 5. When the tool 2 is subjected to stress along the length direction of the spindle 1, the multiple flat keys 4 support the round nut 5, so that the stress on the round nut 5 is evenly distributed, reducing the probability of uneven stress and deformation on the round nut 5, and making it convenient for the user to disassemble the round nut 5 and replace the tool 2.

[0041] Reference Figure 3 and Figure 5 The spindle 1 has multiple mounting slots 121, which are blind slots. These slots are equidistant along the length of the spindle 1. Each slot contains a flat key 4. The thickness of the flat key 4 is greater than the depth of the mounting slot 121. When the flat key 4 is inserted into the mounting slot 121, it extends beyond the slot and abuts against the round nut 5. When the fixing bolt 41 loosens its connection to the spindle 1, the flat key 4 remains locked within the mounting slot 121 and continues to limit the movement of the round nut 5, thus keeping the tool 2 fixed on the spindle 1.

[0042] The implementation principle of this application embodiment is as follows: By machining a connecting part 11 on the spindle 1, the tool 2 and the spacer 3 can be fitted onto the connecting part 11. The cross-sectional shape of the connecting part 11 is a non-circular shape, thereby allowing the tool 2 and the spacer 3 to be locked on the spindle 1, reducing the probability of the tool 2 rotating on the spindle 1. By machining a threaded part 12 on the spindle 1, the round nut 5 can be threaded onto the threaded part 12, thereby allowing the round nut 5 to lock the tool 2 on the connecting part 11, reducing the probability of the tool 2 sliding along the length direction of the spindle 1.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A round nut locking device, characterized in that: Includes a spindle (1), multiple cutting tools (2), a flat key (4) and a round nut (5). The spindle (1) has a threaded part (12), and the cutting tool (2) has a connecting hole (21) in the center. The spindle (1) is inserted into the connecting hole (21). The round nut (5) is threaded onto the threaded part (12) and is used to abut against the end face of the cutting tool (2). The flat key (4) is continuously connected to the spindle (1) and is used to abut against the end face of the round nut (5) away from the cutting tool (2).

2. The round nut locking device according to claim 1, characterized in that: The main shaft (1) includes a connecting part (11), which is coaxially connected with the threaded part (12), and the cross-section of the connecting part (11) is a regular polygon.

3. A round nut locking device according to claim 2, characterized in that: The connecting part (11) has rounded corners at the edge of the prism.

4. A round nut locking device according to claim 3, characterized in that: The cutting tool (2) is provided with multiple cutting edges (22), which are equidistantly spaced along the circumferential direction on the cutting tool (2). The number of cutting edges (22) is the same as the number of sides of the regular polygon formed by the cross-section of the connecting part (11).

5. A round nut locking device according to claim 4, characterized in that: Multiple cutting tools (2) are staggered on the spindle (1), with adjacent cutting tools (2) arranged at an angle to each other.

6. A round nut locking device according to claim 2, characterized in that: The spindle (1) is provided with multiple spacers (3). The spacers (3) are disc structures. A mounting hole (31) is provided at the center of the spacer (3). The connecting part (11) is inserted into the mounting hole (31). The shape of the mounting hole (31) corresponds to the cross-section of the connecting part (11). The spacers (3) are located between two adjacent tools (2).

7. A round nut locking device according to claim 1, characterized in that: The flat key (4) is configured as a plurality of flat keys (4), which are arranged at equal intervals along the circumferential direction of the main shaft (1).

8. A round nut locking device according to claim 7, characterized in that: The main shaft (1) has multiple mounting slots (121), which are blind slots. Each mounting slot (121) has a flat key (4) inside it. The flat key (4) extends out of the mounting slot (121) and abuts against the round nut (5).

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