A side pressure roller gear protection structure

Abstract

The application relates to a side pressure roller gear protection structure, which comprises a side pressure roller, a gear assembly arranged on the side pressure roller, a gear ring and a gear sleeve, the gear sleeve is fixedly sleeved on the end of the side pressure roller, the gear ring is sleeved on the outer surface of the gear sleeve and is engaged with a main machine gear, the gear ring and the gear sleeve transmit torque through a plurality of connecting pieces, and the connecting pieces are broken when the impact load borne by the side pressure roller is higher than the bearing threshold of the connecting pieces. The application protects the side pressure roller gear from being damaged when impact load is generated, and improves the service life of the side pressure roller gear.

Description

Technical Field

[0001] This application relates to the field of side pressure roller accessories technology, and in particular to a side pressure roller gear protection structure. Background Technology

[0002] Rubber extrusion vulcanization equipment is used for processing rubber and plastic products such as wires and cables and rubber pipes. The side pressure roller in the feeding section is a key component for conveying rubber material. In existing extruders, the end of the side pressure roller is equipped with a driven gear that meshes with the main gear. The side pressure roller is driven to rotate through the transmission of the main gear and the driven gear, thereby realizing the continuous extrusion and conveying of rubber material.

[0003] However, due to the problem of feeding difficulties during rubber feeding, or the easy mixing of foreign objects such as metal shavings into the rubber during the conveying process, the rubber may accumulate at the inlet of the side pressure roller or generate huge resistance when passing through the side pressure roller. This resistance will form a strong impact load on the driven gear on the side pressure roller, causing damage or even breakage of the gear teeth, thus reducing the service life of the side pressure roller gear, which is obviously insufficient. Utility Model Content

[0004] In order to protect the side pressure roller gear from damage when impact loads are generated and to improve the service life of the side pressure roller gear, this application provides a side pressure roller gear protection structure.

[0005] The side pressure roller gear protection structure provided in this application adopts the following technical solution: A side pressure roller gear protection structure includes a side pressure roller with a gear assembly. The gear assembly includes a gear ring and a gear sleeve. The gear sleeve is fixedly sleeved on the end of the side pressure roller. The gear ring is sleeved on the outer surface of the gear sleeve and meshes with the main gear. The gear ring and the gear sleeve transmit torque through multiple connectors. When the impact load borne by the side pressure roller exceeds the withstand threshold of the connector, the connector breaks.

[0006] By adopting the above technical solution, when the impact load borne by the side pressure roller is lower than the bearing threshold of the connector, the main gear drives the gear ring to rotate. The gear ring drives the gear sleeve to rotate through the connection of the connector, and the gear sleeve drives the side pressure roller to rotate to realize the conveying of rubber material. When the impact load is higher than the bearing threshold of the connector due to poor feeding or the presence of metal impurities, the connector breaks, the torque transmission path between the gear ring and the gear sleeve is cut off, the gear ring still rotates under the drive of the main gear, and the gear sleeve and the side pressure roller will stop rotating. This avoids the impact load borne by the side pressure roller from being transmitted to the gear ring and causing it to break. This achieves mechanical protection of the gear assembly on the side pressure roller and improves the service life of the side pressure roller gear. Furthermore, if a connector breaks, only a new connector needs to be replaced to restore the equipment operation. There is no need to disassemble or replace core components such as gear rings and gear sleeves, which greatly reduces maintenance costs and downtime, and is suitable for the actual working conditions of rubber extrusion vulcanization production lines.

[0007] Optionally, a connecting groove is provided on the inner circumferential sidewall of the gear ring, and a connecting ring is fixedly sleeved on the outer surface of the gear sleeve. The connecting ring abuts against the inner sidewall of the connecting groove, and the connecting ring is connected to the gear ring through a plurality of the connecting members.

[0008] By adopting the above technical solution, when installing the gear ring, the worker abuts the inner side wall of the upper connecting groove of the gear ring against the connecting ring, and then connects the gear ring and the gear sleeve through the connecting parts. The setting of the connecting ring provides a support base for multiple connecting parts, so that the torque is evenly distributed to each connecting part.

[0009] Optionally, the connector is a safety pin, and both the connecting ring and the gear ring have mounting grooves that correspond one-to-one with the multiple safety pins. The safety pins are interference-fitted into the mounting grooves of the connecting ring and the gear ring.

[0010] By adopting the above technical solution, after the gear ring is installed on the gear sleeve, multiple safety pins are sequentially assembled in the mounting groove. During normal torque transmission, the tightness of the interference fit of the safety pins ensures stable torque transmission between the gear sleeve and the gear ring. When the impact load borne by the side pressure roller exceeds the design threshold of the safety pin, the safety pin breaks in the mounting groove, cutting off the torque transmission between the gear ring and the gear sleeve, thereby preventing damage to the gear ring.

[0011] Optionally, an assembly gap is provided between the outer peripheral sidewall of the gear sleeve and the inner peripheral sidewall of the gear ring. A wear-resistant ring is provided in the assembly gap, with the inner peripheral surface of the wear-resistant ring abutting against the gear sleeve and the outer peripheral surface abutting against the gear ring.

[0012] By adopting the above technical solution, after the gear ring and gear sleeve are connected, the wear-resistant ring is filled in the assembly gap between the gear ring and the gear sleeve, which reduces the possibility of unstable torque transmission due to excessive assembly gap. At the same time, when the gear sleeve and gear ring rub directly due to resistance fluctuations or slight impact loads, the wear-resistant ring can reduce the degree of wear between the surfaces of the gear ring and the gear sleeve, and improve the service life of the gear ring and the gear sleeve.

[0013] Optionally, the toothed sleeve is detachably connected to the side pressure roller via a fastening assembly. The fastening assembly includes a connecting pin disposed at the end of the side pressure roller. The inner sidewall of the toothed sleeve is provided with a keyway that engages with the connecting pin. The keyway is parallel to the axial direction of the side pressure roller. The end of the side pressure roller is detachably connected to a pressure cap via multiple fasteners.

[0014] By adopting the above technical solution, when assembling the gear sleeve, the keyway on the gear sleeve is aligned with the connecting pin and inserted. Then, the gear ring is assembled on the gear sleeve. Finally, the pressure cap is assembled on the side pressure roller through the fastener. The radial and axial displacement of the gear sleeve on the side pressure roller is restricted by the pressure cap and the connecting pin, thereby ensuring the stable transmission of torque between the gear sleeve and the side pressure roller. When the toothed sleeve is damaged, the worker can quickly remove the pressure cover by using the fixing parts and pull out the toothed sleeve along the axial direction, without having to disassemble the entire structure of the side pressure roller, which greatly reduces the difficulty of maintenance.

[0015] Optionally, the fixing component is a pressure cap bolt, and the end of the side pressure roller is provided with a threaded hole that is threadedly connected to the pressure cap bolt. The pressure cap bolt passes through the pressure cap and is threadedly connected in the threaded hole.

[0016] By adopting the above technical solution, when installing the gland, the gland bolt is threaded into the threaded hole. With the help of the self-locking property and tightening force of the threaded bolt and the threaded hole, the gland is firmly attached to the end of the side pressure roller, ensuring the axial clamping effect of the gland against the end face of the toothed sleeve.

[0017] Optionally, the number of connectors is six, and the six connectors are evenly spaced along the circumference of the connecting ring.

[0018] By adopting the above technical solution, the gland and the limiting boss limit the axial sides of the gear ring, thereby reducing the possibility of axial movement of the gear ring during the operation of the side pressure roller and ensuring the stability of the meshing between the gear ring and the main gear; at the same time, the gland and the limiting boss form a block on both sides of the mounting groove, reducing the possibility of the connector breaking and detaching from the mounting groove, causing damage to other components.

[0019] Optionally, a limiting boss is provided on the outer peripheral sidewall of the toothed sleeve away from the pressure cap. The limiting boss abuts against the outer peripheral side of the toothed ring, and the limiting boss and the pressure cap simultaneously cover multiple mounting grooves.

[0020] By adopting the above technical solution, six equidistant and evenly distributed connecting parts further ensure the stable transmission of torque between the gear sleeve and the gear ring.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. In this embodiment of the application, by setting a toothed sleeve, gears and connectors, when the impact load exceeds the bearing threshold of the connector due to poor feeding or the presence of metal impurities, the connector breaks, the torque transmission path between the gear ring and the toothed sleeve is cut off, the gear ring continues to rotate under the drive of the main gear, and the toothed sleeve and the side pressure roller will stop rotating, thereby avoiding the impact load borne by the side pressure roller from being transmitted to the gear ring and causing it to break, thus achieving mechanical protection of the gear assembly on the side pressure roller and improving the service life of the side pressure roller gear; 2. In this embodiment of the application, by setting a fastening component, when assembling the gear sleeve, the keyway on the gear sleeve is aligned with the connecting pin and inserted, then the gear ring is assembled on the gear sleeve, and finally the pressure cap is assembled on the side pressure roller by the fastener. The radial and axial displacement of the gear sleeve on the side pressure roller is restricted by the pressure cap and the connecting pin, thereby ensuring the stable transmission of torque between the gear sleeve and the side pressure roller. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application.

[0023] Figure 2 This is an exploded view of the toothed ring, toothed sleeve, safety pin, and side pressure roller in Embodiment 1 of this application.

[0024] Figure 3 This is a side view of the gear ring and gear sleeve in Embodiment 1 of this application.

[0025] Figure 4 This is a cross-sectional view of the gear ring and gear sleeve in Embodiment 1 of this application.

[0026] Figure 5 This is a schematic diagram of the limiting boss in Embodiment 2 of this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Side pressure roller; 101. Threaded hole; 2. Gear assembly; 21. Gear sleeve; 211. Connecting ring; 212. Keyway; 22. Gear ring; 221. Connecting groove; 23. Connecting piece; 231. Safety pin; 3. Fastening assembly; 31. Connecting pin; 32. Pressure cap; 33. Pressure cap bolt; 4. Mounting groove; 5. Wear-resistant ring; 6. Limiting boss. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0029] This application discloses a side pressure roller gear protection structure.

[0030] Example 1 Reference Figure 1 and Figure 2 A side pressure roller gear protection structure includes a side pressure roller 1, and a gear assembly 2 is fixedly installed at the end of the side pressure roller 1. The gear assembly 2 includes a toothed sleeve 21 that is detachably connected to the side pressure roller 1 by a fastening assembly 3. Under the fastening of the fastening assembly 3, the axial and radial displacement of the toothed sleeve 21 relative to the side pressure roller 1 is restricted.

[0031] Reference Figure 1 , Figure 2 and Figure 3A gear ring 22 that meshes with the main gear is fixedly fitted on the outer surface of the gear sleeve 21. A connecting groove 221 is opened on the inner circumferential side wall of the gear ring 22. A connecting ring 211 is integrally formed on the outer surface of the gear sleeve 21. After the gear sleeve 21 is installed on the side pressure roller 1, the worker fits the gear ring 22 on the outer surface of the gear sleeve 21 and makes the connecting ring 211 abut against the inner side wall of the connecting groove 221 to ensure a tight connection between the gear ring 22 and the gear sleeve 21.

[0032] Reference Figure 3 and Figure 4 The gear ring 22 and gear sleeve 21 transmit torque through six connecting parts 23. Specifically, the connecting parts 23 are safety pins 231. The six safety pins 231 are evenly distributed circumferentially on the connecting ring 211. The connecting ring 211 and the gear ring 22 are provided with mounting grooves 4 corresponding to the six safety pins 231. The mounting grooves 4 on the gear ring 22 extend to the connecting groove 221 and communicate with the mounting grooves 4 on the connecting ring 211. The safety pins 231 are interference-fitted into the mounting grooves 4 of the connecting ring 211 and the gear ring 22. When the impact load borne by the side pressure roller 1 is higher than the bearing threshold of the safety pin 231, the safety pin 231 breaks.

[0033] After the gear ring 22 is fitted onto the outer surface of the gear sleeve 21, six safety pins 231 are sequentially assembled into the mounting groove 4 of the gear ring 22 and the connecting ring 211. When the impact load borne by the side pressure roller 1 is lower than the bearing threshold of the connecting member 23, the main gear drives the gear ring 22 to rotate. The gear ring 22 drives the gear sleeve 21 to rotate through the connecting action of the connecting member 23. The gear sleeve 21 drives the side pressure roller 1 to rotate to realize the conveying of the rubber material. When the impact load exceeds the bearing threshold of the connector 23 due to poor feeding or the presence of metal impurities, the connector 23 breaks, the torque transmission path between the gear ring 22 and the gear sleeve 21 is cut off, the gear ring 22 continues to rotate under the drive of the main gear, and the gear sleeve 21 and the side pressure roller 1 will stop rotating, thereby preventing the impact load borne by the side pressure roller 1 from being transmitted to the gear ring 22 and causing it to break. This achieves mechanical protection for the gear assembly 2 on the side pressure roller 1 and improves the service life of the gears of the side pressure roller 1. After the connector 23 breaks, the equipment stops, and the workers do not need to disassemble or replace the gear ring 22, gear sleeve 21 and other parts. They only need to remove the broken safety pin 231 from the mounting groove 4 and replace it, and then the equipment can be restored to operation.

[0034] Reference Figure 3 and Figure 4 To facilitate the assembly of the gear sleeve 21 and the gear ring 22, an assembly gap (not shown in the figure) is left between the outer peripheral sidewall of the gear sleeve 21 and the inner peripheral sidewall of the gear ring 22. A wear-resistant ring 5 is installed in the assembly gap. In this embodiment, the wear-resistant ring 5 is a rubber ring. The inner peripheral surface of the wear-resistant ring 5 abuts against the gear sleeve 21, and the outer peripheral surface abuts against the gear ring 22.

[0035] After the gear ring 22 and gear sleeve 21 are connected by the connector 23, the worker fills the assembly gap between the gear ring 22 and gear sleeve 21 with a wear-resistant ring 5 to reduce the possibility of unstable torque transmission due to excessive assembly gap. At the same time, when the gear sleeve 21 and gear ring 22 rub directly due to resistance fluctuations or slight impact loads, the wear-resistant ring 5 can reduce the degree of wear between the surfaces of the gear ring 22 and gear sleeve 21 and improve the service life of the gear ring 22 and gear sleeve 21.

[0036] Reference Figure 1 , Figure 2 and Figure 3 The fastening assembly 3 includes a connecting pin 31 fixedly installed at the end of the side pressure roller 1. The connecting pin 31 is integrally formed with the side pressure roller 1. The inner side wall of the toothed sleeve 21 is provided with a keyway 212 that engages with the connecting pin 31. Both the keyway 212 and the connecting pin 31 are arranged parallel to the axial direction of the side pressure roller 1. After the toothed sleeve 21 is fitted onto the side pressure roller 1 through the keyway 212 and the connecting pin 31, the radial displacement between the toothed sleeve 21 and the side pressure roller 1 is restricted.

[0037] Reference Figure 1 and Figure 2 The fastening assembly 3 also includes a pressure cap 32 that is detachably connected to the end of the side pressure roller 1 by a plurality of fasteners. The fasteners are pressure cap 32 bolts. In this embodiment, there are two pressure cap 32 bolts. The end of the side pressure roller 1 is provided with a threaded hole 101 that is threadedly connected to the pressure cap 32 bolt. The pressure cap 32 bolt passes through the pressure cap 32 and is threadedly connected in the threaded hole 101. The pressure cap 32 abuts against the end face of the toothed sleeve 21.

[0038] After the gear ring 22 and gear sleeve 21 are assembled, the worker abuts the pressure cap 32 against the end face of the gear sleeve 21, and then threads the pressure cap 32 bolt into the threaded hole 101. With the help of the self-locking property and tightening force of the threads of the pressure cap 32 bolt and the threaded hole 101, the pressure cap 32 is firmly attached to the end of the side pressure roller 1, ensuring the axial pressing effect of the pressure cap 32 against the end face of the gear sleeve 21. The setting of the pressure cap 32 and the connecting pin 31 realizes the dual limit of the gear sleeve 21 in the radial and axial directions, ensuring the stable transmission of torque between the gear sleeve 21 and the side pressure roller 1.

[0039] The implementation principle of the gear protection structure for a side pressure roller in this embodiment is as follows: First, a gear sleeve 21 is installed on the side pressure roller 1 using a fastening assembly 3. Then, a gear ring 22 is fitted onto the gear sleeve 21 and connected to it using a connector 23. In this way, the gear assembly 2 is assembled on the side pressure roller 1. When the impact load borne by the side pressure roller 1 is lower than the bearing threshold of the connector 23, the main gear drives the gear ring 22 to rotate. The gear ring 22 drives the gear sleeve 21 to rotate through the connection of the connector 23, and the gear sleeve 21 drives the side pressure roller 1 to rotate. It enables the conveying of rubber material; when the impact load exceeds the bearing threshold of the connector 23 due to poor feeding or the presence of metal impurities, the connector 23 breaks, the torque transmission path between the gear ring 22 and the gear sleeve 21 is cut off, the gear ring 22 continues to rotate under the drive of the main gear, and the gear sleeve 21 and the side pressure roller 1 will stop rotating, thereby preventing the impact load borne by the side pressure roller 1 from being transmitted to the gear ring 22 and causing it to break, thus achieving mechanical protection of the gear assembly 2 on the side pressure roller 1 and improving the service life of the gears of the side pressure roller 1.

[0040] Example 2 Reference Figure 5 The difference between this embodiment and Embodiment 1 is that a limiting boss 6 is integrally formed on the outer peripheral side wall of the toothed sleeve 21 away from the pressure cover 32. The limiting boss 6 abuts against the outer peripheral side of the toothed ring 22. The diameter of the limiting boss 6 is larger than that of the connecting ring 211 and smaller than that of the toothed ring 22. Both the limiting boss 6 and the pressure cover 32 cover six mounting grooves 4 at the same time.

[0041] The implementation principle of Example 2 is as follows: the pressure cap 32 and the limiting boss 6 limit the axial sides of the gear ring 22, thereby reducing the possibility of axial movement of the gear ring 22 during the operation of the side pressure roller 1, and ensuring the stability of the meshing between the gear ring 22 and the main gear; at the same time, the pressure cap 32 and the limiting boss 6 form a block on both sides of the mounting groove 4, reducing the possibility that the connector 23 will break and detach from the mounting groove 4, causing damage to other parts.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Images