Crusher speed reducer gear protection structure

Abstract

The utility model provides a crusher reducer gear protection structure, which relates to the technical field of crushers and comprises a reducer gear, fixing sleeves and a reducer output shaft, the fixing sleeves are arranged at the upper end and the lower end of the reducer gear, and the reducer output shaft penetrates through the fixing sleeves and the reducer gear. A mounting hole is formed in the outer side of the fixing sleeve, a bolt outer rod is mounted in the mounting hole, and a special-shaped rod is arranged at the inner end of the bolt outer rod; the bolt outer rod penetrates through the mounting hole in the fixing sleeve, the bolt inner rod is in threaded connection with the output shaft of the speed reducer, the special-shaped rod with hardness and torque resistance parameters which are less than those of the bolt outer rod and the bolt inner rod is connected between the bolt outer rod and the bolt inner rod, and the special-shaped rod is broken when subjected to impact load, so that a gear of the speed reducer is protected, and the service life of the speed reducer is prolonged. During maintenance, only the broken rod pin bolt needs to be replaced, so that the maintenance time is saved, the repair and maintenance cost of equipment is saved, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of crushers, in particular to a gear protection structure for a crusher reducer. Background Art

[0002] A crusher is one of the important devices in the raw coal preparation and screening process of a coal preparation plant. Due to the large size, high hardness (the size of some large pieces of gangue exceeds 1000 mm), and large quantity of large pieces of gangue in the mine raw coal, the crusher is often overloaded and blocked during normal production. In particular, the reducer is frequently damaged. According to statistics, the reducer in the mine raw coal is damaged by tooth sweeping on average every 1 - 2 months, with high maintenance costs. Each time there is a large area of tooth sweeping, a major overhaul is required. After a fault shutdown, the time for replacing the reducer each time is long, which seriously restricts the safe and efficient production of the coal preparation plant.

[0003] Since the crusher belongs to an impact load, although there is electrical protection, when crushing extremely hard large pieces of gangue, the instantaneous impact energy often causes the teeth of the reducer gear to be swept before the overload and blocked rotation protection actions stop the machine. Therefore, how to mechanically protect the reducer gear of the crusher from being damaged by impact loads when crushing extremely hard large pieces of gangue is a problem to be solved. Therefore, the utility model proposes a gear protection structure for a crusher reducer to solve the problems existing in the prior art. Content of the Utility Model

[0004] In view of the above problems, the utility model proposes a gear protection structure for a crusher reducer. When the gear protection structure of the crusher reducer is subjected to an impact load, the special-shaped rod breaks, thereby protecting the reducer gear. During maintenance, only the broken pin bolt needs to be replaced, which not only saves the maintenance time but also saves the maintenance cost of the equipment and improves the production efficiency.

[0005] To achieve the purpose of the utility model, the utility model is realized through the following technical solutions: A gear protection structure for a crusher reducer includes a reducer gear, a fixed sleeve, and a reducer output shaft. Fixed sleeves are provided at both the upper and lower ends of the reducer gear. The reducer output shaft passes through the fixed sleeve and the inside of the reducer gear. An installation hole is provided on the outer side of the fixed sleeve, and a bolt outer rod is installed inside the installation hole. A special-shaped rod is provided at the inner end of the bolt outer rod, and a bolt inner rod is provided at the inner end of the special-shaped rod. The bolt inner rod is fixedly threaded with the reducer output shaft.

[0006] The hardness and anti-torque parameters of the special-shaped rod are less than those of the bolt outer rod and the bolt inner rod.

[0007] Further improvement lies in that: an internal thread groove is provided on the outer side of the reducer output shaft, and an external thread is provided on the outer side of the bolt inner rod. The external thread is adapted to the internal thread groove.

[0008] A further improvement lies in that: a screw head is provided at the outer end of the outer rod of the bolt, an embedded groove is provided at the outer end of the mounting hole, the embedded groove is adapted to the screw head, and a cross groove is provided on the screw head.

[0009] A further improvement lies in that: the outer rod of the bolt, the special-shaped rod and the inner rod of the bolt form a rod pin bolt, and at least three groups of rod pin bolts are fixedly arranged at equal angles between the fixed sleeve and the output shaft of the reducer.

[0010] A further improvement lies in that: the reducer gear includes a gear cylinder and gear teeth, the gear teeth are arranged on the outer side of the gear cylinder, and multiple groups of gear teeth are arranged at equal angles, and the gear teeth are integrally formed with the gear cylinder.

[0011] A further improvement lies in that: the outer diameter of the outer side of the fixed sleeve is smaller than the outer diameter of the outer side of the gear cylinder, the inner diameter of the inner side of the fixed sleeve is adapted to the inner diameter of the gear cylinder, and the fixed sleeve and the gear cylinder are integrally formed.

[0012] A further improvement lies in that: the special-shaped rod is a polygonal rod, and a hollow cavity is provided inside the special-shaped rod, and multiple groups of hollow cavities are provided.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. The present utility model reforms the connection structure between the output shaft of the reducer and the fixed sleeve of the reducer gear. The outer rod of the bolt passes through the mounting hole on the fixed sleeve, and the inner rod of the bolt is threadedly connected with the output shaft of the reducer. A special-shaped rod with hardness and anti-torque parameters lower than those of the outer rod and inner rod of the bolt is connected between the outer rod and inner rod of the bolt. When subjected to impact load, the special-shaped rod breaks, thereby protecting the reducer gear. During maintenance, only the broken rod pin bolt needs to be replaced, which not only saves maintenance time but also saves the maintenance cost of the equipment and improves production efficiency.

[0015] 2. The special-shaped rod of the present utility model is set as a polygonal rod. After breaking, when the reducer gear, the fixed sleeve and the output shaft of the reducer are separated, a handle adapted to the shape of the polygonal rod can be used to rotate the protruding polygonal rod, which is convenient for removing the inner rod of the bolt from the internal thread groove of the output shaft of the reducer, making it more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the front view of the present utility model;

[0017] Figure 2 is the schematic diagram of the rod pin bolt of the present utility model;

[0018] Figure 3 is the installation schematic diagram of the fixed sleeve and the output shaft of the reducer of the present utility model;

[0019] Figure 4 Schematic diagram of the special-shaped rod of the present utility model.

[0020] Wherein: 1. Fixed sleeve; 2. Reducer output shaft; 3. Mounting hole; 4. Outer rod of bolt; 5. Special-shaped rod; 6. Inner rod of bolt; 7. Inner thread groove; 8. External thread; 9. Screw head; 10. Gear cylinder; 11. Gear teeth; 12. Hollow cavity. Specific embodiments

[0021] To deepen the understanding of the present utility model, the following will further elaborate on the present utility model in combination with embodiments. These embodiments are only used to explain the present utility model and do not constitute a limitation on the protection scope of the present utility model.

[0022] Embodiment 1

[0023] According to Figure 1 , 2 , as shown in 3 and 4, this embodiment proposes a gear protection structure for a crusher reducer, including a reducer gear, a fixed sleeve 1, and a reducer output shaft 2. Fixed sleeves 1 are provided at both the upper and lower ends of the reducer gear. The reducer output shaft 2 passes through the fixed sleeve 1 and the inside of the reducer gear. An installation hole 3 is provided on the outer side of the fixed sleeve 1, and an outer rod 4 of a bolt is installed inside the installation hole 3. A special-shaped rod 5 is provided at the inner end of the outer rod 4 of the bolt. A bolt inner rod 6 is provided at the inner end of the special-shaped rod 5, and the bolt inner rod 6 is threadedly fixed to the reducer output shaft 2;

[0024] The hardness and anti-torque parameters of the special-shaped rod 5 are less than those of the outer rod 4 and the inner rod 6 of the bolt. During use, the connection structure between the reducer output shaft 2 and the fixed sleeve 1 on the reducer gear is modified. The outer rod 4 of the bolt passes through the installation hole 3 on the fixed sleeve 1, and the inner rod 6 of the bolt is threadedly connected to the reducer output shaft 2. A special-shaped rod 5 with hardness and anti-torque parameters lower than those of the outer rod 4 and the inner rod 6 of the bolt is connected between the outer rod 4 and the inner rod 6 of the bolt. When subjected to an impact load, the special-shaped rod 5 breaks, thereby protecting the reducer gear. During maintenance, only the broken rod pin bolt needs to be replaced, which not only saves maintenance time but also saves the equipment maintenance cost and improves production efficiency.

[0025] An inner thread groove 7 is provided on the outer side of the reducer output shaft 2, and an external thread 8 is provided on the outer side of the bolt inner rod 6. The external thread 8 is adapted to the inner thread groove 7. The outer rod 4 of the bolt passes through the installation hole 3 on the fixed sleeve 1, and the external thread 8 of the bolt inner rod 6 is threadedly connected to the inner thread groove 7 of the reducer output shaft 2. A special-shaped rod 5 with hardness and anti-torque parameters lower than those of the outer rod 4 and the inner rod 6 of the bolt is connected between the outer rod 4 and the inner rod 6 of the bolt. When subjected to an impact load, the special-shaped rod 5 breaks, thereby protecting the reducer gear.

[0026] The outer end of the outer rod 4 of the bolt is provided with a screw head 9. The outer end of the mounting hole 3 is provided with an embedded groove, which is adapted to the screw head 9, and the screw head 9 is provided with a cross groove. By using a screwdriver to fit the cross groove, the rod pin bolt can be tightened to fix the fixing sleeve 1 and the reducer output shaft 2.

[0027] The outer rod 4 of the bolt, the special-shaped rod 5 and the inner rod 6 of the bolt form a rod pin bolt. The fixing sleeve 1 and the reducer output shaft 2 are fixed at equal angles through three groups of rod pin bolts. Fixing the fixing sleeve 1 and the reducer output shaft 2 at equal angles from three positions is more stable and firm.

[0028] The reducer gear includes a gear cylinder 10 and gear teeth 11. The gear teeth 11 are arranged on the outer side of the gear cylinder 10, and multiple groups of gear teeth 11 are arranged at equal angles. The gear teeth 11 and the gear cylinder 10 are integrally formed. The outer diameter of the outer side of the fixing sleeve 1 is smaller than the outer diameter of the outer side of the gear cylinder 10, the inner diameter of the inner side of the fixing sleeve 1 is adapted to the inner diameter of the gear cylinder 10, and the fixing sleeve 1 and the gear cylinder 10 are integrally formed. The integrally formed structure makes the reducer gear and the fixing sleeve 1 more robust and not easily damaged by tooth sweeping.

[0029] Embodiment 2

[0030] According to Figure 1 、 2 As shown in FIGS. 3 and 4, this embodiment proposes a protection structure for a crusher reducer gear, including a reducer gear, a fixing sleeve 1 and a reducer output shaft 2. Fixing sleeves 1 are provided at both the upper and lower ends of the reducer gear. The reducer output shaft 2 passes through the fixing sleeve 1 and the inside of the reducer gear. An installation hole 3 is provided on the outer side of the fixing sleeve 1, and an outer rod 4 of a bolt is installed inside the installation hole 3. The inner end of the outer rod 4 of the bolt is provided with a special-shaped rod 5, the inner end of the special-shaped rod 5 is provided with an inner rod 6 of the bolt, and the inner rod 6 of the bolt is threadedly fixed to the reducer output shaft 2;

[0031] The hardness and anti-torque parameters of the special-shaped rod 5 are less than those of the outer rod 4 and the inner rod 6 of the bolt. During use, the connection structure between the reducer output shaft 2 and the fixing sleeve 1 on the reducer gear is modified. The outer rod 4 of the bolt passes through the installation hole 3 on the fixing sleeve 1, and the inner rod 6 of the bolt is threadedly connected to the reducer output shaft 2. A special-shaped rod 5 with hardness and anti-torque parameters inferior to those of the outer rod 4 and the inner rod 6 of the bolt is connected between the outer rod 4 and the inner rod 6 of the bolt. When subjected to an impact load, the special-shaped rod 5 breaks, thereby protecting the reducer gear. During maintenance, only the broken rod pin bolt needs to be replaced, which not only saves the maintenance time but also saves the equipment maintenance cost and improves the production efficiency.

[0032] The outer rod 4 of the bolt, the special-shaped rod 5 and the inner rod 6 of the bolt form a rod pin bolt. The fixed sleeve 1 and the output shaft 2 of the reducer are fixed by three groups of rod pin bolts at equal angles. Fixing the fixed sleeve 1 and the output shaft 2 of the reducer at equal angles from three positions is more stable and firm.

[0033] The special-shaped rod 5 is a polygonal rod, and a hollow cavity 12 is provided inside the special-shaped rod 5, and multiple groups of the hollow cavities 12 are provided. The hardness and anti-torque parameters of the special-shaped rod 5 are reduced through the hollow cavity 12. The outer rod 4 of the bolt passes through the mounting hole 3 on the fixed sleeve 1, and the inner rod 6 of the bolt is threadedly connected to the output shaft 2 of the reducer. A special-shaped rod 5 with hardness and anti-torque parameters lower than those of the outer rod 4 and the inner rod 6 of the bolt is connected between the outer rod 4 and the inner rod 6 of the bolt. When subjected to an impact load, the special-shaped rod 5 breaks, thereby protecting the reducer gear. The special-shaped rod 5 is set as a polygonal rod. After breaking, after separating the reducer gear, the fixed sleeve 1 and the output shaft 2 of the reducer, a handle adapted to the shape of the polygonal rod 5 can be used to rotate the protruding polygonal rod 5, which is convenient for removing the inner rod 6 of the bolt from the internal thread groove 7 of the output shaft 2 of the reducer, which is more convenient.

[0034] The protection structure of the crusher reducer gear is modified in the connection structure between the output shaft 2 of the reducer and the fixed sleeve 1 on the reducer gear. The outer rod 4 of the bolt passes through the mounting hole 3 on the fixed sleeve 1, and the inner rod 6 of the bolt is threadedly connected to the output shaft 2 of the reducer. A special-shaped rod 5 with hardness and anti-torque parameters lower than those of the outer rod 4 and the inner rod 6 of the bolt is connected between the outer rod 4 and the inner rod 6 of the bolt. When subjected to an impact load, the special-shaped rod 5 breaks, thereby protecting the reducer gear. During maintenance, only the broken rod pin bolt needs to be replaced, which not only saves the maintenance time but also saves the maintenance cost of the equipment and improves the production efficiency. And the special-shaped rod 5 is set as a polygonal rod. After breaking, after separating the reducer gear, the fixed sleeve 1 and the output shaft 2 of the reducer, a handle adapted to the shape of the polygonal rod 5 can be used to rotate the protruding polygonal rod 5, which is convenient for removing the inner rod 6 of the bolt from the internal thread groove 7 of the output shaft 2 of the reducer, which is more convenient.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A crusher reducer gear protection structure, comprising a reducer gear, a fixed sleeve (1) and a reducer output shaft (2), characterized in that: The upper and lower ends of the reducer gear are both provided with a fixing sleeve (1), the reducer output shaft (2) passes through the fixing sleeve (1) and the reducer gear, the outer side of the fixing sleeve (1) is provided with a mounting hole (3), and the inside of the mounting hole (3) is provided with a bolt outer rod (4), the inner end of the bolt outer rod (4) is provided with a special-shaped rod (5), the inner end of the special-shaped rod (5) is provided with a bolt inner rod (6), and the bolt inner rod (6) is threadedly fixed to the reducer output shaft (2); The hardness and torque resistance parameters of the special-shaped rod (5) are smaller than the hardness and torque resistance parameters of the bolt outer rod (4) and the bolt inner rod (6).

2. A crusher reducer gear protection structure according to claim 1, characterized in that: An inner thread groove (7) is provided on the outer side of the reducer output shaft (2), and an outer thread (8) is provided on the outer side of the bolt inner rod (6), and the outer thread (8) is matched with the inner thread groove (7).

3. A crusher reducer gear protection structure according to claim 2, characterized in that: The outer end of the bolt outer rod (4) is provided with a screw head (9), the outer end of the mounting hole (3) is provided with an embedded groove, the embedded groove is matched with the screw head (9), and the screw head (9) is provided with a cross groove.

4. A crusher reducer gear protection structure according to claim 3, characterized in that: The bolt outer rod (4), the special-shaped rod (5) and the bolt inner rod (6) form a pin bolt, and the fixing sleeve (1) and the reducer output shaft (2) are fixed at equal angles by at least three groups of pin bolts.

5. A crusher reducer gear protection structure according to claim 1, characterized in that: The reducer gear comprises a gear barrel (10) and gear teeth (11); the gear teeth (11) are arranged outside the gear barrel (10), and a plurality of groups of gear teeth (11) are arranged at equal angles; the gear teeth (11) and the gear barrel (10) are integrally formed.

6. A crusher reducer gear protection structure according to claim 5, characterized in that: The outer diameter of the fixing sleeve (1) is smaller than the outer diameter of the gear cylinder (10), the inner diameter of the fixing sleeve (1) is matched with the inner diameter of the gear cylinder (10), and the fixing sleeve (1) and the gear cylinder (10) are integrally formed.

7. A crusher reducer gear protection structure according to claim 1, characterized in that: The special-shaped rod (5) is a polygonal rod, and a hollow cavity (12) is provided on the inner side of the special-shaped rod (5), and the hollow cavity (12) is provided in multiple groups.

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