Overload protection structure for gear of feeding roller of rubber extruder

Abstract

The utility model discloses a rubber extruder feeding roller gear overload protection structure which comprises an inner gear ring, the inner gear ring is connected with a hole check ring, an outer gear ring and safety pins, the inner gear ring and the outer gear ring are connected through the hole check ring, the safety pins are arranged between the inner gear ring and the outer gear ring, and the number of the safety pins is two. The safety pin can be broken, the limiting mechanism is arranged at one end of the safety pin and used for preventing the safety pin from moving upwards in the axial direction to fall off, and the other end of the safety pin is limited through a stepped hole below the outer gear ring; the gear overload protection structure for the feeding roller of the rubber extruder solves the problems of overload of the feeding roller and breakage of a gear transmission system under the condition of high load or sudden increase of resistance in the prior art.

Description

TECHNICAL FIELD

[0001] The utility model relates to rubber machinery equipment technical field, concretely relates to a kind of rubber extruder feeding roller gear overload protection structure. BACKGROUND

[0002] In the rubber machinery industry, the feeding roller transmission system of extruder widely adopts the mode of driving by screw gear to provide power. In the system structure, the feeding roller is driven by screw to feed rubber material into the system. In the prior art, the driving force of the feeding roller is directly derived from the transmission of screw gear. However, when the hardness of the feeding rubber is high or mixed with iron and other sundries, it will generate great resistance to the feeding roller, causing the operation of the feeding roller to be blocked.

[0003] Due to the high torque output capability of the screw transmission system, when encountering resistance, the screw will still transmit a large transmission torque to the gear. In this way, when the torque exceeds the bearing limit of the gear material, the transmission gear is prone to breakage or other mechanical failures. Such failures not only seriously affect the normal operation of the production line, but also lead to high equipment maintenance frequency and low production efficiency. In addition, the replacement of the gear and the screw maintenance process takes a long time, further affecting the production continuity. SUMMARY

[0004] The utility model aims at providing a kind of rubber extruder feeding roller gear overload protection structure, solve the overload of the feeding roller of prior art, the problem of gear transmission system fracture under high load or resistance sudden increase.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of rubber extruder feeding roller gear overload protection structure, comprising:

[0006] Inner tooth ring, the inner tooth ring is connected with hole check ring;

[0007] Outer tooth ring, the inner tooth ring is connected with hole check ring with outer tooth ring;

[0008] Safety pin, safety pin is arranged between the inner tooth ring and outer tooth ring, the number of safety pin is one, and the safety pin can be broken;

[0009] Limiting mechanism, the limiting mechanism is arranged at one end of safety pin, the limiting mechanism is used to prevent safety pin from moving upward and falling off along the axial direction, and the other end of the safety pin is limited by the stepped hole below the outer tooth ring.

[0010] Preferably, the limiting mechanism includes a baffle, and the baffle is arranged at one end of the safety pin.

[0011] Preferably, the inner gear ring side is also attached with a wear ring, and the inner gear ring and the outer gear ring are attached with the wear ring after the safety pin is broken.

[0012] Preferably, the hole is arranged at the contact surface of the inner gear ring and the outer gear ring by the hole stop ring.

[0013] Preferably, the safety pins are uniformly distributed at the contact position of the outer gear ring and the inner gear ring.

[0014] Preferably, the wear ring adopts a graphite-inlaid copper sleeve structure, has a self-lubricating function, and is arranged at the contact surface of the inner gear ring and the outer gear ring.

[0015] Preferably, the inner gear ring and the outer gear ring are tightly attached by the hole stop ring.

[0016] From the above technical solution, the utility model has the following beneficial effects:

[0017] The rubber extruder feeding roller gear overload protection structure is characterized in that, when the feeding roller encounters a large resistance, the safety pin will break first, thereby preventing the gear and other transmission components from being damaged due to overload. The safety pin is replaced more conveniently and at a lower cost compared with the gear and the screw, thereby greatly reducing equipment downtime and maintenance costs and improving production efficiency. The wear ring is arranged at the contact surface of the inner and outer gear rings and adopts a graphite-inlaid copper sleeve structure, thereby having a self-lubricating function. When the safety pin is broken, the inner and outer gear rings will still rotate relatively, but the wear ring can effectively prevent the gear from being worn, thereby prolonging the service life of the gear and further reducing the maintenance frequency. The inner and outer gear rings can be tightly combined by the hole stop ring, thereby preventing the structure from being separated under high load. In addition, the safety pin is firmly fixed by the baffle and the stepped hole structure, thereby avoiding axial shedding of the safety pin during operation and solving the problems of the existing feeding roller overload and the gear transmission system breaking under high load or sudden resistance increase. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole structure section view schematic diagram of the utility model;

[0019] Figure 2 It is a whole structure operation schematic diagram of the utility model.

[0020] In the figure, 1 is an inner gear ring; 2 is a hole stop ring; 3 is an outer gear ring; 4 is a safety pin; 5 is a limiting mechanism; 51 is a baffle; 6 is a wear ring; 7 is a screw; 8 is a feeding roller; 9 is a screw gear; and 10 is a feeding roller gear. DETAILED DESCRIPTION

[0021] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0022] As shown in Figure 1 and Figure 2 A kind of rubber extruder feeding roller gear overload protection structure, including inner gear ring 1 and outer gear ring 3, inner gear ring 1 is connected with outer gear ring 3 by hole with retainer 2.8 Safety pins 4 are arranged between inner gear ring 1 and outer gear ring 3, the purpose of the setting of safety pin 4 is to automatically break when overload, to protect other elements in structure from being damaged.In addition, limiting mechanism 5 is installed at one end of safety pin 4, for preventing safety pin 4 from moving upward along the axial direction and falling off, the other end of safety pin 4 is limited and fixed by the step hole below outer gear ring 3.

[0023] In normal operation, inner gear ring 1 is combined together with outer gear ring 3 by hole with retainer 2, and jointly bears operating load.When overload occurs, safety pin 4 will first bear stress and break after reaching the limit load, releasing the connection force between the gears, protecting other key components of the gear system. Broken safety pin 4 will not fall off under the action of limiting mechanism 5, thereby preventing the broken part from entering the gear transmission mechanism to cause secondary damage. This embodiment sets safety pin 4, so that the gear overload protection function can quickly disconnect the gear connection when the gear is overloaded, protecting the core components of the equipment. The setting of limiting mechanism 5 effectively prevents safety pin 4 from falling off after breaking, thereby further improving the stability of the gear and the safety of the system.

[0024] Limiting mechanism 5 includes a baffle 51 fixed to one end of safety pin 4 to provide additional axial limiting support to prevent safety pin 4 from moving upward after breaking. When safety pin 4 breaks, baffle 51 can ensure that the position of safety pin 4 remains stable. By increasing the support, baffle 51 further enhances the axial fixation of safety pin 4, avoiding adverse effects on the normal operation of the equipment due to the loosening or falling off of safety pin 4. By adding baffle 51 as a component of limiting mechanism 5, the positioning of safety pin 4 is more stable, effectively reducing the risk of falling off after breaking, and enhancing the operational safety and maintenance convenience of the equipment.

[0025] In other embodiments, limiting mechanism 5 can use other structural forms instead of baffle 51, such as spring washers or nuts with locking grooves, to achieve the same limiting effect. At the same time, the material and shape of baffle 51 can also be adjusted according to the use environment of the equipment.

[0026] One side of the inner ring 1 is equipped with a wear ring 6, and after the safety pin 4 is broken, the inner ring 1 and the outer ring 3 will both fit onto the wear ring 6. When the safety pin 4 breaks, the inner ring 1 and the outer ring 3 immediately come into direct contact with the wear ring 6. The wear ring 6 can act as a buffer device to disperse impact force and avoid direct collision between the two rings, thereby reducing the wear and impact of the gear. The setting of the wear ring 6 can reduce the direct wear of the gear after overload disconnection, prolong the service life of the equipment, and at the same time improve the overall impact resistance of the gear system.

[0027] In other embodiments, the material of the wear ring 6 can be selected from other wear-resistant materials such as ceramics or carbon fiber composites to meet different usage requirements. The thickness and position of the wear ring 6 can also be optimized according to the specific load characteristics of the equipment.

[0028] The hole retainer 2 is arranged on the contact surface of the inner ring 1 and the outer ring 3 to tightly connect them and prevent loosening. The hole retainer 2 serves as a fixing function to tightly connect the inner ring 1 and the outer ring 3 together and prevent them from moving relative to each other. This design ensures the synchronous operation of the gear during transmission, and the position design of the hole retainer 2 can avoid loosening between the two rings due to vibration or load changes, thereby improving the stability of the gear system.

[0029] In other embodiments, the hole retainer 2 can be replaced by different shaped buckles or bolt structures to meet the needs of greater loads. The retainer material can also be selected from higher strength alloy materials to improve durability.

[0030] The safety pins 4 are evenly distributed at the contact position of the outer ring 3 and the inner ring 1. The evenly distributed safety pins 4 can achieve uniform load distribution when under stress, ensuring the stability of the overload protection effect. This uniform distribution design improves the stability of the overload protection, effectively avoiding uneven stress on the safety pins 4, thereby prolonging the service life of the safety pins.

[0031] In other embodiments, the arrangement of the safety pins 4 can be designed as symmetrically distributed or asymmetrically distributed according to the load characteristics to optimize the load capacity of the equipment.

[0032] The wear ring 6 adopts a graphite-embedded copper sleeve structure with self-lubricating function and is installed at the contact surface of the inner ring 1 and the outer ring 3. The graphite-embedded copper sleeve wear ring 6 provides self-lubricating function on the contact surface of the inner ring 1 and the outer ring 3, reducing friction resistance and the adverse effects caused by contact wear. The self-lubricating wear ring 6 significantly reduces friction, reduces energy consumption of the equipment, improves durability and smooth operation of the equipment. In other embodiments, the wear ring 6 can use other materials with self-lubricating properties, such as polytetrafluoroethylene or ceramic composite materials, to further improve self-lubricating performance and service life.

[0033] The inner gear ring 1 and the outer gear ring 3 are tightly fitted by the hole check ring 2, the tight fitting of the hole check ring 2 ensures the relative position stability of the inner gear ring 1 and the outer gear ring 3, avoids the gap between the gear rings to affect the transmission efficiency, through the tight fitting design, ensures that the gear ring combination part does not loosen, thereby maintaining the precision of the gear operation and the efficient transmission of the system.

[0034] The inner and outer parts of the feeding roller gear 10 are prone to mutual disconnection, the hole check ring structure is adopted in the application, the axial force can be overcome, the two parts are connected as a whole, the contact surface of the inner gear ring 1 and the outer gear ring 3 is tightly fitted together, and the safety pin only bears the shearing force, so that the protection function of the safety pin is ensured.

[0035] The feeding roller gear 10 is designed as a composite structure, the feeding roller gear 10 is designed as an inner and outer two-part structure, eight standard cylindrical pins are used to connect the gears into a whole, through accurate calculation, the shearing strength of the eight standard cylindrical pins is less than the breaking strength of the feeding roller gear, and the breaking strength of the feeding roller gear 10 is less than the breaking strength of the screw gear 9.

[0036] When the hardness of the feeding rubber is too large or there are other sundries such as iron blocks, a great resistance is generated to the feeding roller 8, along with the increase of the resistance, the output torque of the screw 7 is also increased, the screw 7 drives the feeding roller gear 10 to rotate through the screw gear 9, when the resistance exceeds the shearing strength of the eight standard cylindrical pins, the eight standard cylindrical pins are broken, the feeding roller 8 does not rotate, but the screw 7 still rotates, the outer gear ring 3 of the feeding roller gear 10 is also rotated by the screw gear 9, but the inner gear ring 1 of the feeding roller gear 10 and the feeding roller 8 are connected as a whole, so the inner gear ring 1 and the feeding roller 8 do not rotate, therefore, the screw 7 only drives the outer gear ring 3 of the feeding roller gear 10 to rotate, the resistance is small, and the overload protection function is realized.

[0037] One end of the safety pin is limited by the baffle 51 to prevent upward axial movement and disconnection, and the other end is provided with eight holes in the lower plane of the outer gear ring 3, the hole structure is a stepped hole form, which can effectively prevent the safety pin 4 from opening downward, through the two modes, the safety pin 4 is firmly fixed, so that the safety pin 4 cannot move axially, and other faults are avoided.

[0038] When the overload occurs, the safety pin 4 is broken, and the feeding roller 8 does not rotate. However, the inner and outer gears are in a state of mutual rotation, the contact parts are mutually rubbed, a wear-resistant ring 5 is arranged at the position in the application, the wear-resistant ring 5 adopts a graphite-embedded copper sleeve structure and has a self-lubricating function, and the inner and outer gears are protected from mutual wear. When the operator cannot find it in time, the gear structure will not be damaged.

[0039] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rubber extruder feed roll gear overload protection structure, characterized by, Include: The inner gear ring (1) is connected with the hole stop ring (2); The outer gear ring (3), the inner gear ring (1) and the outer gear ring (3) are connected through the hole stop ring (2); Safety pin (4), the inner gear ring (1) and the outer gear ring (3) are provided with safety pin (4), the number of safety pin (4) is 8, safety pin (4) can be broken; Limiting mechanism (5), the limiting mechanism (5) is arranged at one end of the safety pin (4), the limiting mechanism (5) is used for preventing the safety pin (4) from moving upward along the axial direction and falling off, the other end of the safety pin (4) is limited through the stepped hole below the outer gear ring (3).

2. A rubber extruder feed roll gear overload protection structure according to claim 1 wherein: The limiting mechanism (5) includes a baffle (51), and the baffle (51) is arranged at one end of the safety pin (4).

3. A rubber extruder feed roll gear overload protection structure according to claim 1 wherein: The inner gear ring (1) is also attached with a wear-resistant ring (6) on one side, and the inner gear ring (1) and the outer gear ring (3) are attached with the wear-resistant ring (6) after the safety pin (4) is broken.

4. A rubber extruder feed roll gear overload protection structure according to claim 1 wherein: The hole stop ring (2) is arranged at the contact surface of the inner gear ring (1) and the outer gear ring (3).

5. A rubber extruder feed roll gear overload protection structure according to claim 1 wherein: The safety pins are uniformly distributed at the contact position of the outer gear ring (3) and the inner gear ring (1).

6. A rubber extruder feed roll gear overload protection structure according to claim 3 wherein: The wear-resistant ring (6) adopts a copper sleeve structure embedded with graphite, has a self-lubricating function, and is installed at the contact surface of the inner gear ring (1) and the outer gear ring (3).

7. A rubber extruder feed roll gear overload protection structure as defined in claim 1, wherein: The inner gear ring (1) and the outer gear ring (3) are closely attached through the hole stop ring (2).

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