Anti-fracture transmission gear

Abstract

The anti-fracture transmission gear comprises a gear ring, a connecting disc and a pin shaft, a first connecting plate is arranged on the inner ring of the gear ring, a first mounting hole is formed in the first connecting plate, positioning grooves are formed in the two sides of the first mounting hole, a second connecting plate is arranged on the outer ring of the connecting disc, and a second mounting hole is formed in the second connecting plate. A first mounting hole is formed in the first connecting plate, a second mounting hole is formed in the second connecting plate, positioning protrusions are arranged on the two sides of the second mounting hole, the pin shaft is inserted into the first mounting hole and the second mounting hole, the pin shaft is in interference fit with the first mounting hole and the second mounting hole, and the positioning protrusions are inserted into the positioning grooves. According to the transmission gear, the positioning groove and the positioning protrusion are arranged around the first mounting hole and the second mounting hole, the shearing force transmitted to the pin shaft is dispersed through cooperation of the positioning groove and the positioning protrusion, the pin shaft has high anti-shearing capacity, the anti-shearing capacity of the transmission gear is improved, and the service life of the transmission gear is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of transmission gears, and particularly to a fracture-proof transmission gear. Background Art

[0002] The statements in this part merely provide background technical information related to this application and do not necessarily constitute prior art.

[0003] In the transmission system of a bulldozer, transmission gears are used as transmission components. The transmission gears are divided into integral type or split type. The integral transmission gear is smaller and is integrally manufactured by casting, while the split type is suitable for larger gears and is generally composed of a gear ring and a connecting plate. The gear ring and the connecting plate are generally connected by bolts, which is convenient for disassembly and installation. However, during actual use, when the split transmission gear rotates, it will be subjected to shear forces at the rotating shaft and the gear meshing position. When the shear force acts on the bolt connection position, after the bolt is subjected to a large shear force, it is easy to break, resulting in damage to the transmission gear. Therefore, it is necessary to design a transmission gear that can prevent fracture after being subjected to shear forces and increase the service life of the transmission gear. Summary of the Utility Model

[0004] To solve the above problems, this application proposes a fracture-proof transmission gear.

[0005] The purpose of this application is to provide a fracture-proof transmission gear. By setting positioning grooves and positioning protrusions around the first mounting hole and the second mounting hole, and using the cooperation of the positioning grooves and the positioning protrusions to disperse the shear force transmitted to the pin shaft, and the pin shaft itself has strong shear resistance, it can prevent the gear ring and the connecting plate from separating during rotation, and improve the shear resistance and service life of the transmission gear itself.

[0006] To achieve the above purpose, this application adopts the following technical solutions:

[0007] A fracture-proof transmission gear, comprising: a gear ring, a connecting plate and a pin shaft. The inner ring of the gear ring is provided with a first connecting plate, the first connecting plate is provided with a first mounting hole, and positioning grooves are arranged on both sides of the first mounting hole. The outer ring of the connecting plate is provided with a second connecting plate, the second connecting plate is provided with a second mounting hole, the second mounting hole corresponds to the first mounting hole, positioning protrusions are arranged on both sides of the second mounting hole, the positioning protrusions correspond to the positioning grooves, the pin shaft is inserted into the first mounting hole and the second mounting hole, the pin shaft and the first mounting hole and the second mounting hole are in interference fit, and the positioning protrusions are inserted into the positioning grooves.

[0008] As a further preferred, the first mounting hole is a through hole, the second mounting hole is a blind hole, and the depth of the blind hole is greater than half of the depth of the through hole.

[0009] As a further preference, threaded holes are further provided on the first connecting plate and the second connecting plate. There are four threaded holes, and bolts connect the gear ring and the connecting plate through the threaded holes.

[0010] As a further preference, at least forty positioning grooves are provided on the first connecting plate, and positioning protrusions with the same number as the positioning grooves are provided on the second connecting plate.

[0011] As a further preference, the number of the first mounting holes and the second mounting holes is twenty.

[0012] As a further preference, the first connecting plate and the second connecting plate are parallel to each other.

[0013] As a further preference, the connecting plate includes a heat dissipation plate and a funnel-shaped through hole. The funnel-shaped through hole is located at the center of the connecting plate. The heat dissipation plate is annular. The heat dissipation part is wrapped around the funnel-shaped through hole. The second connecting plate is located at the periphery of the heat dissipation plate. There is an included angle of 110 degrees between the second connecting plate and the heat dissipation plate.

[0014] Compared with the prior art, the beneficial effects of the present application are as follows:

[0015] 1. By arranging positioning grooves and positioning protrusions around the first mounting holes and the second mounting holes, the present application utilizes the cooperation of the positioning grooves and the positioning protrusions to disperse the shear force transmitted to the pin shaft. Moreover, the pin shaft itself has strong shear resistance, which can prevent the gear ring and the connecting plate from separating during rotation, improve the shear resistance of the transmission gear itself, and extend the service life of the transmission gear. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 is Figure 1 the sectional view taken along the line A-A in

[0018] Figure 3 is Figure 2 the partial enlarged view of part B in

[0019] Wherein: 1. Gear ring, 2. Connecting plate, 3. Pin shaft, 4. Bolt, 5. Heat dissipation hole, 6. Heat dissipation plate, 7. First connecting plate, 8. Second connecting plate, 9. Funnel-shaped through hole, 10. First mounting hole, 11. Second mounting hole, 12. Positioning protrusion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present application will be further described below in conjunction with the drawings and embodiments. Embodiment

[0021] An anti-fracture transmission gear, as Figures 1-3 shown, comprising: a gear ring 1, a connecting plate 2 and a pin shaft 3. A gear is provided on the outer side of the gear ring 1. A first connecting plate 7 is provided on the inner ring of the gear ring 1. A first mounting hole 10 is provided on the first connecting plate 7. Positioning grooves are provided on both sides of the first mounting hole 10. A second connecting plate 8 is provided on the outer ring of the connecting plate 2. A second mounting hole 11 is provided on the second connecting plate 8. The second mounting hole 11 corresponds to the first mounting hole 10. Positioning protrusions 12 are provided on both sides of the second mounting hole 11. The positioning protrusions 12 correspond to the positioning grooves. The pin shaft 3 is inserted into the first mounting hole 10 and the second mounting hole 11. The pin shaft 3 is in interference fit with the first mounting hole 10 and the second mounting hole 11. The positioning protrusions 12 are inserted into the positioning grooves.

[0022] As Figure 3 shown, the first mounting hole 10 is a through hole, and the second mounting hole 11 is a blind hole. The depth of the blind hole is greater than half of the depth of the through hole. In this way, when the pin shaft 3 is inserted into the first mounting hole 10 and the second mounting hole 11, it will not pass through the second connecting plate 8, so that the pin shaft 3 is embedded in the first mounting hole 10 and the second mounting hole 11. Compared with the connection of the bolt 4, the head of the bolt 4 is on the outside of the mounting hole and is prone to fracture after being subjected to shear force, while the pin shaft 3 is completely embedded in the first mounting hole 10 and the second mounting hole 11, so there is no need to worry about the fracture of the external bolt 4 head, ensuring the connection strength of the pin shaft 3.

[0023] Threaded holes are also provided on the first connecting plate 7 and the second connecting plate 8. There are four threaded holes. The bolt 4 connects the gear ring 1 and the connecting plate 2 through the threaded holes, making the connection more compact.

[0024] At least forty positioning grooves are provided on the first connecting plate 7. The second connecting plate 8 is provided with positioning protrusions 12 having the same number as the positioning grooves. In this way, the shear force received by the pin shaft 3 can be shared by a plurality of positioning grooves and positioning protrusions 12.

[0025] As Figure 1 shown, the number of the first mounting hole 10 and the second mounting hole 11 is twenty. Fixed connection is carried out through twenty pin shafts 3, and the shear force is evenly distributed to these twenty pin shafts 3, so that the shear force received by each pin shaft 3 is reduced and the connection is more stable.

[0026] As Figure 2 shown, the first connecting plate 7 and the second connecting plate 8 are parallel to each other, so that the contact surface connection between the first connecting plate 7 and the second connecting plate 8 is more compact and the connection strength is improved.

[0027] A limiting block is provided on the second connecting plate 8, and the limiting block is located on the side of the second connecting plate 8 away from the gear. During installation, auxiliary positioning is performed through the limiting block.

[0028] As Figure 2 shown, the connecting plate 2 includes a heat dissipation plate 6 and a funnel-shaped through hole 9. The funnel-shaped through hole 9 is located at the center of the connecting plate 2. The heat dissipation plate 6 is annular. The heat dissipation part is wrapped around the funnel-shaped through hole 9. The second connecting plate 8 is located at the periphery of the heat dissipation plate 6, and there is an included angle of 110 degrees between the second connecting plate 8 and the heat dissipation plate 6.

[0029] Heat dissipation holes 5 are provided on the connecting plate 2. There are four heat dissipation holes 5, which are evenly distributed on the connecting plate 2. The heat dissipation holes 5 can reduce the weight of the connecting plate 2 while dissipating heat.

[0030] The minimum diameter of the funnel-shaped through hole 9 is equal to the diameter of the rotating shaft in the power system. The funnel-shaped through hole 9 can facilitate the installation of the connecting plate 2 and the rotating shaft.

[0031] In the technical solution of this application, first, the connection between the gear ring 1 and the connecting plate 2 is changed from the conventional bolt 4 connection to the pin shaft 3 connection. When the pin shaft 3 bears the shear force, its entire cross-section can evenly share the load, so it has better anti-shear performance. While the bolt 4 mainly relies on the friction force and pre-tightening force of the thread to bear the load, the threaded part of the bolt 4 is relatively weak and is prone to fracture when bearing a large shear force. Therefore, the pin shaft 3 is better. Secondly, through the positioning grooves and the positioning protrusions 12 distributed around the first mounting holes 10 and the second mounting ports, while the positioning and installation are more convenient, through the contact between the positioning protrusions 12 and the positioning grooves, a part of the shear force is transmitted to the positioning protrusions 12, which can also share the load borne by the pin shaft 3 and improve the anti-shear ability and service life of the transmission gear as a whole.

[0032] Although the specific implementation manners of this application are described above in conjunction with the drawings, it is not a limitation to the protection scope of this application. Those skilled in the art should understand that based on the technical solution of this application, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of this application.

Claims

1. An anti-fracture transmission gear, characterized in that, Comprising: A gear ring, a connecting plate and a pin shaft. The inner ring of the gear ring is provided with a first connecting plate. The first connecting plate is provided with a first mounting hole. Positioning grooves are arranged on both sides of the first mounting hole. The outer ring of the connecting plate is provided with a second connecting plate. The second connecting plate is provided with a second mounting hole. The second mounting hole corresponds to the first mounting hole. Positioning protrusions are arranged on both sides of the second mounting hole. The positioning protrusions correspond to the positioning grooves. The pin shaft is inserted into the first mounting hole and the second mounting hole. The pin shaft and the first mounting hole and the second mounting hole are in interference fit. The positioning protrusions are inserted into the positioning grooves.

2. The anti-fracture transmission gear according to claim 1, characterized in that, The first mounting hole is a through hole, and the second mounting hole is a blind hole. The depth of the blind hole is greater than half of the depth of the through hole.

3. The anti-fracture transmission gear according to claim 1, characterized in that, Threaded holes are further arranged on the first connecting plate and the second connecting plate. There are four threaded holes. Bolts connect the gear ring and the connecting plate through the threaded holes.

4. The anti-fracture transmission gear according to claim 1, characterized in that, At least forty positioning grooves are arranged on the first connecting plate. The second connecting plate is provided with positioning protrusions with the same number as the positioning grooves.

5. The anti-fracture transmission gear according to claim 1, characterized in that, The number of the first mounting holes and the second mounting holes is twenty.

6. The anti-fracture transmission gear according to claim 1, characterized in that, The first connecting plate and the second connecting plate are parallel to each other.

7. The anti-fracture transmission gear according to claim 1, characterized in that, The connecting plate includes a heat dissipation plate and a funnel-shaped through hole. The funnel-shaped through hole is located at the center of the connecting plate. The heat dissipation plate is annular. The heat dissipation part is wrapped around the funnel-shaped through hole. The second connecting plate is located at the periphery of the heat dissipation plate. An included angle of 110 degrees is provided between the second connecting plate and the heat dissipation plate.

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