Drive axle assembly mounting structure of drive axle gearbox

Abstract

The utility model relates to the technical field of drive axle assembly installation, in particular to a drive axle assembly installation structure of a drive axle gearbox, which comprises a transmission shaft, couplers are arranged at two ends of the transmission shaft, a transmission shaft key groove is arranged on the surface of the transmission shaft, and coupler key grooves are arranged on the inner walls of the couplers. One end of a flat key is movably inserted into the coupling key slot, and the other end of the flat key is movably inserted into the transmission shaft key slot; the transmission shaft has the beneficial effects that a plurality of groups of transmission shaft key grooves are formed in the surface of the transmission shaft, a plurality of groups of coupling key grooves are formed in the inner wall of the coupling, the transmission shaft key grooves and the coupling key grooves are in one-to-one correspondence, and the same group of flat keys are inserted between the transmission shaft key grooves and the coupling key grooves which correspond to each other; the plurality of groups of flat keys bear shearing force together, the shearing force on each group of flat keys can be much smaller, the flat keys are prevented from being broken, and meanwhile, the transmission shaft key groove does not need to penetrate through the shaft body of the transmission shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of drive axle assembly installation, in particular to a drive axle assembly installation structure of a drive axle gearbox. Background Art

[0002] The drive axle and gearbox are both important components of the automobile transmission system. The drive axle is located at the end of the transmission system and can change the speed and torque from the transmission and transmit it to the drive wheels. The gearbox is an important component in the automobile transmission system. It is mainly used to change the speed and torque of the engine to adapt to the needs of different driving conditions. The drive axle assembly installation structure of the drive axle gearbox refers to the connection structure between the drive axle assembly and the gearbox.

[0003] In the prior art, the connection structure between the drive axle assembly and the gearbox is usually achieved through the cooperation of a drive shaft and a coupling. Couplings are provided at both ends of the drive shaft, one set of couplings is connected to the output shaft of the gearbox at one end away from the drive shaft, and the other set of couplings is connected to the input shaft of the drive axle assembly at one end away from the drive shaft. The power is transmitted from the engine to the gearbox and then to the drive axle assembly via the drive shaft, and finally to the wheels to realize power transmission. The connection between the drive shaft and the coupling is usually achieved by providing through holes on both the coupling and the drive shaft. After the end of the drive shaft is inserted into the coupling, the through holes of the drive shaft and the coupling are aligned, and then the bolts are inserted and the nuts are tightened to complete the installation between the drive shaft and the coupling. This installation method is simple and quick.

[0004] However, in the prior art, the installation method between the drive shaft and the coupling is such that when the drive shaft and the coupling rotate synchronously, the synchronous rotation between the two relies entirely on a bolt to withstand the shear force, which can easily lead to the bolt breaking. At the same time, the through hole passes through the shaft body of the drive shaft, which can also easily cause the drive shaft to break. Utility Model Content

[0005] The purpose of the present utility model is to provide a drive axle assembly installation structure of a drive axle gearbox to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a drive axle assembly mounting structure of a drive axle gearbox, comprising: a drive shaft, couplings are provided at both ends of the drive shaft, a drive shaft keyway is provided on the surface of the drive shaft, a coupling keyway is provided on the inner wall of the coupling, one end of a flat key is movably inserted in the coupling keyway, and the other end of the flat key is movably inserted in the drive shaft keyway, and the drive shaft keyway, coupling keyway and flat key are provided in several groups, and the several groups of drive shaft keyways, coupling keyways and flat keys are distributed circumferentially about the axis of the drive shaft.

[0007] Preferably, the transmission shaft keyway and the coupling keyway are both rectangular slot structures, and the flat key is a rectangular block structure.

[0008] Preferably, a limit groove is provided on the surface of the transmission shaft, a limit rod installation groove is provided on the inner wall of the coupling, one end of the limit rod is movably inserted in the limit rod installation groove, and the other end of the limit rod is movably inserted in the limit groove.

[0009] Preferably, the limiting groove and the limiting rod installation groove are both circular groove structures, and the limiting rod is a circular rod structure.

[0010] Preferably, a limiting spring is fixed between one end of the limiting rod extending into the limiting rod installation slot and the inner wall of the limiting rod installation slot.

[0011] Preferably, a pull rod hole is opened on the outer wall of the coupling, a pull rod is movably inserted into the pull rod hole, one end of the pull rod is fixed to the limit rod, and the other end of the pull rod is fixed to a pull ring.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The drive axle assembly mounting structure of the drive axle gearbox proposed by the utility model has several groups of drive shaft keyways on the surface of the drive shaft, and several groups of coupling keyways on the inner wall of the coupling. The drive shaft keyways and the coupling keyways correspond to each other one by one, and the same group of flat keys are inserted between the corresponding drive shaft keyways and coupling keyways. When the drive shaft and the coupling rotate synchronously, the several groups of flat keys jointly bear the shear force, and the shear force on each group of flat keys can be much smaller, thereby avoiding the flat keys from breaking. At the same time, the drive shaft keyways do not need to pass through the shaft body of the drive shaft, thereby avoiding the drive shaft from breaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 3 for Figure 2 A magnified schematic diagram of the structure in the middle.

[0017] In the figure: transmission shaft 1, coupling 2, transmission shaft keyway 3, coupling keyway 4, flat key 5, limit groove 6, limit rod mounting groove 7, limit rod 8, pull rod 9, limit spring 10, pull rod hole 11, pull ring 12. DETAILED DESCRIPTION

[0018] In order to clearly and completely describe the purpose and technical solution of the present invention and make its advantages more clearly understood, the following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention and are not intended to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figures 1 to 3 The utility model provides a technical solution: a drive axle assembly installation structure of a drive axle gearbox, comprising: a transmission shaft 1, a coupling 2 is provided at both ends of the transmission shaft 1, a transmission shaft keyway 3 is provided on the surface of the transmission shaft 1, a coupling keyway 4 is provided on the inner wall of the coupling 2, one end of a flat key 5 is movably inserted in the coupling keyway 4, and the other end of the flat key 5 is movably inserted in the transmission shaft keyway 3, and the transmission shaft keyway 3, the coupling keyway 4 and the flat key 5 are all provided in several groups, and the several groups of transmission shaft keyways 3, the coupling keyways 4 and the flat keys 5 are all distributed circumferentially about the axis of the transmission shaft 1, the transmission shaft keyway 3 and the coupling keyway 4 are both rectangular slot structures, and the flat key 5 is a rectangular block structure.

[0020] In actual use, the drive axle assembly installation structure of the drive axle gearbox has several groups of drive shaft keyways 3 on the surface of the drive shaft 1, and several groups of coupling keyways 4 on the inner wall of the coupling 2. The drive shaft keyways 3 and the coupling keyways 4 correspond to each other one by one, and the same group of flat keys 5 are inserted between the corresponding drive shaft keyways 3 and the coupling keyways 4. When the drive shaft 1 and the coupling 2 rotate synchronously, the several groups of flat keys 5 jointly bear the shear force, and the shear force on each group of flat keys 5 can be much smaller, thereby avoiding the flat keys 5 from breaking. At the same time, the drive shaft keyway 3 does not need to pass through the shaft body of the drive shaft 1, thereby avoiding the drive shaft 1 from breaking.

[0021] Example 2: On the basis of Example 1, in order to realize quick assembly and disassembly of the transmission shaft 1 and the coupling 2, a limiting groove 6 is opened on the surface of the transmission shaft 1, and a limiting rod mounting groove 7 is opened on the inner wall of the coupling 2. One end of the limiting rod 8 is movably inserted in the limiting rod mounting groove 7, and the other end of the limiting rod 8 is movably inserted in the limiting groove 6. The limiting groove 6 and the limiting rod mounting groove 7 are both circular groove structures, and the limiting rod 8 is a circular rod structure. The limiting rod 8 extends into one end of the limiting rod mounting groove 7 and a limiting spring 10 is fixed between the inner wall of the limiting rod mounting groove 7. A pull rod hole 11 is opened on the outer wall of the coupling 2, and a pull rod 9 is movably inserted in the pull rod hole 11. One end of the pull rod 9 is fixed to the limiting rod 8, and the other end of the pull rod 9 is fixed with a pull ring 12.

[0022] When the transmission shaft 1 and the coupling 2 need to be disassembled, the finger is inserted into the pull ring 12 and pulled outward. The pull ring 12 pulls the pull rod 9 out of the pull rod hole 11, and the pull rod 9 drives the limit rod 8 to withdraw from the limit groove 6. Then the transmission shaft 1 can be removed from the coupling 2, and the disassembly of the transmission shaft 1 and the coupling 2 is completed. When the transmission shaft 1 and the coupling 2 need to be installed, the finger is inserted into the pull ring 12 again and pulled outward. The pull ring 1 2 Pull the pull rod 9 out of the pull rod hole 11. The pull rod 9 drives the limit rod 8 to completely retract into the limit rod installation groove 7. The movement of the limit rod 8 compresses the limit spring 10. Then insert the drive shaft 1 into the coupling 2. After inserting it all the way, release the pull ring 12 and rotate the coupling 2. When the limit rod installation groove 7 is aligned with the limit groove 6, the limit spring 10 automatically pushes one end of the limit rod 8 into the limit groove 6, and the installation of the drive shaft 1 and the coupling 2 is completed.

[0023] In actual use, the drive axle assembly installation structure of the drive axle gearbox has several groups of drive shaft keyways 3 on the surface of the drive shaft 1, and several groups of coupling keyways 4 on the inner wall of the coupling 2. The drive shaft keyways 3 and the coupling keyways 4 correspond to each other one by one, and the same group of flat keys 5 are inserted between the corresponding drive shaft keyways 3 and the coupling keyways 4. When the drive shaft 1 and the coupling 2 rotate synchronously, the several groups of flat keys 5 jointly bear the shear force, and the shear force on each group of flat keys 5 can be much smaller, avoiding the flat keys 5 from breaking. At the same time, the drive shaft keyway 3 does not need to pass through the shaft body of the drive shaft 1, which can avoid the drive shaft 1 from breaking. When the drive shaft 1 and the coupling 2 need to be disassembled, put your fingers into the pull ring 12 and pull it outward, and the pull ring 12 will pull the rod 9 Pull it out from the pull rod hole 11, the pull rod 9 drives the limit rod 8 to withdraw from the limit groove 6, and then the transmission shaft 1 can be removed from the coupling 2, completing the disassembly of the transmission shaft 1 and the coupling 2; when the transmission shaft 1 and the coupling 2 need to be installed, insert your finger into the pull ring 12 again and pull it outward, the pull ring 12 pulls the pull rod 9 out of the pull rod hole 11, and the pull rod 9 drives the limit rod 8 to be completely retracted into the limit rod mounting groove 7. The movement of the limit rod 8 causes the limit spring 10 to be compressed, and then the transmission shaft 1 is inserted into the coupling 2. After inserting it to the end, release the pull ring 12 and rotate the coupling 2. When the limit rod mounting groove 7 is aligned with the limit groove 6, the limit spring 10 automatically pushes one end of the limit rod 8 into the limit groove 6, and the installation of the transmission shaft 1 and the coupling 2 is completed.

[0024] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drive axle assembly mounting structure of a drive axle gearbox, comprising: A transmission shaft (1), with couplings (2) provided at both ends of the transmission shaft (1), characterized in that: a transmission shaft keyway (3) is provided on the surface of the transmission shaft (1), a coupling keyway (4) is provided on the inner wall of the coupling (2), one end of a flat key (5) is movably inserted in the coupling keyway (4), and the other end of the flat key (5) is movably inserted in the transmission shaft keyway (3), and the transmission shaft keyway (3), the coupling keyway (4) and the flat key (5) are all provided in a plurality of groups, and the plurality of groups of transmission shaft keyways (3), coupling keyways (4) and the flat keys (5) are all distributed in a circle about the axis of the transmission shaft (1).

2. The drive axle assembly mounting structure of a drive axle transmission according to claim 1, characterized in that: The transmission shaft keyway (3) and the coupling keyway (4) are both rectangular slot structures, and the flat key (5) is a rectangular block structure.

3. The drive axle assembly mounting structure of a drive axle transmission according to claim 1, characterized in that: A limiting groove (6) is provided on the surface of the transmission shaft (1), a limiting rod installation groove (7) is provided on the inner wall of the coupling (2), one end of the limiting rod (8) is movably inserted into the limiting rod installation groove (7), and the other end of the limiting rod (8) is movably inserted into the limiting groove (6).

4. The drive axle assembly mounting structure of a drive axle transmission according to claim 3, characterized in that: The limiting groove (6) and the limiting rod installation groove (7) are both circular groove structures, and the limiting rod (8) is a circular rod structure.

5. The drive axle assembly mounting structure of a drive axle transmission according to claim 4, characterized in that: A limiting spring (10) is fixed between one end of the limiting rod (8) extending into the limiting rod installation groove (7) and the inner wall of the limiting rod installation groove (7).

6. The drive axle assembly mounting structure of a drive axle transmission according to claim 5, characterized in that: A pull rod hole (11) is provided on the outer wall of the coupling (2), a pull rod (9) is movably inserted into the pull rod hole (11), one end of the pull rod (9) is fixed to the limit rod (8), and a pull ring (12) is fixed to the other end of the pull rod (9).

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