CN102628479A - Structure of universal transmission shaft and flexible coupling - Google Patents

Abstract

The invention discloses a universal transmission shaft and a flexible coupling structure, which comprises a universal transmission shaft with flanges at both ends and a flexible coupling, and the flexible coupling includes a hollow rigid shaft ring for axial connection , the flexible outer ring used to connect with the universal joint shaft, the flexible outer ring flexible ring, the flexible ring is provided with a rigid radial connection block and a rigid axial connection block along the circumference; the first flange of the universal joint transmission shaft It is connected with the rigid axial connection block; the hollow rigid shaft ring is connected with the rigid radial connection block, and one end of the hollow rigid shaft ring is connected axially outward. The present invention not only uses the traditional universal transmission system to output power to the vehicle-mounted equipment and instruments to ensure the angle and displacement compensation of the vibration of the vehicle-mounted equipment and instruments, but also ensures the power output to the vehicle-mounted equipment and instruments through the addition of a flexible coupling. The uniformity and stability of the rotating speed, and the anti-shock protection of the engine and on-board equipment and instruments meet the requirements of transmission efficiency.

Description

Cardan shaft and flexible coupling structure

technical field

The invention relates to the technical field of automobile transmission system development, in particular to a universal transmission shaft and a flexible coupling structure.

Background technique

Universal drive system is widely used in various vehicles, mainly used to connect powertrain, transmission box and wheel hub, etc., while performing uninterrupted power output, it can compensate the angle and displacement of moving parts and system vibration. Now some off-road vehicles need to be equipped with some precision instruments and equipment, and have high stability requirements for the input power. In order to reduce the weight of the vehicle, improve the mobility, and make the structure of the vehicle more compact, it is necessary to use it directly. The vehicle engine is used as its power source. In this case, in addition to driving the vehicle's own transmission system to make the vehicle run, the engine also needs to provide power output to the on-board equipment and instruments. If only the ordinary universal transmission system is used for connection, it can only guarantee the angle of vibration, etc. and displacement compensation. How to ensure the stability of the output of the engine to the equipment and instruments and how to protect the engine body and equipment and instruments under certain special working conditions has become a difficult problem.

Contents of the invention

The purpose of the present invention is to provide a universal transmission shaft and a flexible coupling structure to solve the problems described in the above-mentioned background technology.

The technical solution of the present invention is: a universal joint shaft and a flexible coupling structure, including the universal joint shaft, the two ends of the universal joint shaft are provided with flanges, and the special feature is that there is also a flexible Coupling, the flexible coupling includes a hollow rigid shaft ring for axial connection, a flexible outer ring for connecting with the cardan shaft, the flexible outer ring includes a flexible ring, and the flexible ring is along the circumference There is a rigid radial connection block, and a rigid axial connection block is provided along the circumference of the flexible ring; the first flange of the cardan shaft is connected to the rigid axial connection block; the hollow rigid shaft ring is connected to the rigid radial The connection block is connected; one end of the hollow rigid shaft ring is connected to the outside of the shaft.

In the above scenario:

A support shaft is provided at the end of the first flange.

The supporting shaft provided at the end of the first flange is sleeved in the shaft hole of the hollow rigid shaft ring.

One end of the hollow rigid shaft ring is open, and the other end is provided with an end plate.

A sliding bush is provided between the support shaft and the shaft hole of the hollow rigid shaft ring.

The outer ring of the sliding bush is in interference fit with the inner wall of the shaft hole of the hollow rigid shaft ring.

The sliding bushing includes an inner ring and an outer ring connected as a whole; a lubricating grease storage hole is provided on the inner wall of the inner ring, and an oil guide groove communicated with the lubricating grease storage hole.

The axially external connection structure of the hollow rigid shaft ring includes an end plate provided at the end of the hollow rigid shaft ring, and an external connection hole is opened on the end plate.

The outer wall of the hollow rigid shaft ring is provided with a first threaded hole, and the rigid radial connecting block is provided with a radial second threaded hole, and the first threaded hole and the second threaded hole are connected by bolts.

The axial connection block is provided with an axial hole, and the axial hole is connected with the hole on the first flange through bolts.

The radial connecting block can be a plurality of individual parts distributed in the flexible ring at intervals along the circumference, or can be an annular part arranged in the flexible ring.

The axial connection block can be a plurality of individual parts distributed in the flexible ring at intervals along the circumference, or can be an annular part arranged in the flexible ring.

There is no contact between the radial connection block and the axial connection block.

The material of the hollow rigid shaft ring of the flexible coupling in the present invention can be a metal substance similar to aluminum alloy, and the material of the flexible outer ring can be a flexible substance like rubber, through the rigid radial connection provided in the flexible coupling The block and the rigid axial connection block make the cardan shaft and the hollow rigid shaft ring flexibly connected. The flexible connection has a self-adjusting function, so that the hollow rigid shaft ring can play a radial support role for the cardan shaft, which can ensure flexibility. The flexible outer ring of the coupling only bears the torsional moment, and then plays the role of adjusting the torsional vibration and alleviating the torsional impact, while the displacement and angle of the engine and the connected vehicle equipment due to vibration, etc., are compensated by the universal joint shaft .

According to the present invention, the support shaft arranged at the end of the first flange of the cardan shaft is sleeved in the shaft hole of the hollow rigid shaft ring, and the sliding bush provided between the support shaft and the shaft hole of the hollow rigid shaft ring, Among them, the interference fit between the outer ring of the sliding bush and the inner wall of the shaft hole of the hollow rigid shaft ring is to transfer the bending moment caused by gravity, unbalance or angle when the universal joint shaft is working to the flexible shaft. The hollow rigid shaft ring of the coupling is finally transmitted to the engine for bearing, and when the flexible coupling acts, when the engine torsional vibration occurs, the support shaft sleeved on the inner ring of the hollow rigid shaft ring of the flexible coupling can be A little rotation in the sliding bush further plays the role of adjusting torsional vibration and alleviating torsional impact.

In the present invention, both the traditional universal transmission system performs power output to the vehicle-mounted equipment and instruments to ensure that the vibration of the vehicle-mounted equipment and instruments is compensated for angle and displacement, and the additional flexible coupling is used to ensure the output of the vehicle-mounted equipment and instruments. The speed uniformity and stability of the power, and the anti-shock protection of the engine and on-board equipment and instruments meet the requirements of transmission efficiency.

Description of drawings

Fig. 1 is the overall schematic diagram of the present invention.

Fig. 2 is a schematic cross-sectional view of the present invention.

Figure 3 is an overall schematic diagram of the flexible coupling.

Figure 4 is a schematic cutaway view of the flexible coupling.

Figure 5 is a schematic diagram of the structure of the sliding bush.

In the figure: cardan shaft 1, flexible coupling 2, sliding bush 3, flexible outer ring 4, axial connection block 5, hollow rigid shaft ring 6, radial connection block 7, flexible ring 8, the first method Lan 9, support shaft 10, inner ring 11, outer ring 12, lubricating grease storage hole 13, oil guide groove 14, second flange 15, end plate 16, outer connecting hole 17, axial hole 18, bolt 19, A first threaded hole 20 , a second threaded hole 20 , and a bolt 21 .

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not limit the present invention.

A universal joint shaft and a flexible coupling structure as shown in Figure 1, comprising a universal joint shaft 1 and a flexible coupling 2, the two ends of the universal joint shaft 1 are provided with a first flange 9 and a second flange The flange 15 and the second flange 15 are connected with the equipment and instruments that need to be driven by bolts, and the end of the first flange 9 is provided with a support shaft 10 .

As shown in Figures 3 and 4, the flexible coupling 2 includes a hollow rigid shaft ring 6 and a flexible outer ring 4, the flexible outer ring 4 includes a flexible ring 8, and the flexible ring 8 is provided with four rigid radial shafts evenly spaced along the circumference. The connecting block 7 and the flexible ring 8 are provided with four rigid axial connecting blocks 5 evenly spaced along the circumference.

As shown in Figures 2 and 4, the first flange 9 of the cardan shaft 1 is connected to the axial hole 18 of the rigid axial connecting block 5 through bolts 19, and a first flange is provided on the outer wall of the hollow rigid shaft ring. The threaded hole 20 is provided with a radial second threaded hole 21 on the rigid radial connecting block, and the first threaded hole 19 and the second threaded hole 20 are connected by bolts 21 . There is no contact between the four rigid axial connection blocks 5 and the four radial connection blocks 7 , and they are not connected. In this way, the cardan shaft 1 and the hollow rigid shaft ring 6 can be flexibly connected, and the flexible connection has a self-adjusting function, so that the hollow rigid shaft ring 6 can play a radial support role for the cardan shaft 1, that is, the flexible coupling can be guaranteed The flexible outer ring 4 of 2 only bears the torsional moment, and then plays the role of adjusting torsional vibration and alleviating torsional impact, while the displacement and angle of the engine and connected vehicle equipment due to vibration, etc., are compensated by the cardan shaft 1 .

As shown in Figures 2 and 4, one end of the hollow rigid shaft ring 6 is provided with an end plate 16, and an external connection hole 17 is opened on the end plate, and is connected to the front output end of the engine crankshaft through a bolt that cooperates with the external connection hole 17 The other end of the hollow rigid shaft ring 6 is open, the support shaft 10 provided at the end of the first flange 9 is sleeved in the hollow rigid shaft ring 6, and a sliding lining is provided between the support shaft 10 and the hollow rigid shaft ring 6 Set of 3.

As shown in Figure 5, the sliding bushing 3 is made of a tin bronze plate 11 for the inner ring and a seamless steel pipe 12 for the outer ring to form a whole through high-temperature sintering. The inner wall of the inner ring 11 is provided with a lubricating grease storage hole 13, and The oil guide groove 14 communicated with the lubricating grease storage hole 13 . The interference fit between the outer ring of the sliding bush 3 and the inner wall of the shaft hole of the hollow rigid shaft ring 6, the function of this design is: the bending caused by the gravity and the unbalance or the angle caused by the gravity and the unbalance or the included angle of the cardan shaft 1 can be reduced. The torque is transmitted to the hollow rigid shaft ring 6 of the flexible coupling 2 and finally transmitted to the engine for bearing, and when the flexible coupling 2 acts, it is sleeved on the inner ring of the hollow rigid shaft ring 6 of the flexible coupling 2 The support shaft 10 can be rotated a little in the sliding bush 3 to further adjust torsional vibration and relieve torsional impact. As a variation of this embodiment, the inner ring of the sliding bush 3 is in interference fit with the outer wall of the support shaft 10 to achieve the above effect.

The universal joint shaft 1 in this embodiment can be a ball cage type universal joint shaft, a cross shaft universal joint shaft or other forms of universal joint shafts.

Claims (10)

1. A universal joint shaft and a flexible shaft coupling structure, comprising a universal joint shaft (1), the two ends of the universal joint shaft (1) are provided with flanges, and it is characterized in that: a flexible shaft coupling ( 2), the flexible coupling (2) includes a hollow rigid shaft ring (6) for axial connection, a flexible outer ring (4) for connecting with the cardan shaft (1), the flexible The outer ring (4) includes a flexible ring (8), the flexible ring (8) is provided with a rigid radial connection block (7) along the circumference, and the flexible ring (8) is provided with a rigid axial connection block (5) along the circumference ); the first flange (9) of the universal joint shaft (1) is connected with the rigid axial connecting block (5); the hollow rigid shaft ring (6) is connected with the rigid radial connecting block (7); the hollow rigid One end of the axle ring (6) is axially externally connected. 2. The universal joint transmission shaft and flexible coupling structure according to claim 1, characterized in that: the end of the first flange (9) is provided with a support shaft (10). 3. The cardan shaft and flexible coupling structure according to claim 2, characterized in that: the support shaft (10) is sheathed in the shaft hole of the hollow rigid collar (6). 4. The universal joint shaft and flexible coupling structure according to claim 1, characterized in that: one end of the hollow rigid collar (6) is open, and the other end is provided with an end plate (16). 5. The universal joint shaft and flexible coupling structure according to claim 3, characterized in that: a sliding bushing (3 ). 6. The cardan shaft and flexible coupling structure according to claim 5, characterized in that: the outer ring of the sliding bush (3) passes through the inner wall of the shaft hole of the hollow rigid shaft ring (6). surplus cooperation. 7. The universal joint shaft and flexible coupling structure according to claim 5 or 6, characterized in that: the sliding bush (3) includes an inner ring (11) and an outer ring (12) connected as a whole ); the inwall of the inner ring (11) is provided with a grease storage hole (13), an oil guide groove (14) communicated with the grease storage hole (13). 8. The universal transmission shaft and flexible coupling structure according to claim 1, characterized in that: the axially outward connection structure of the hollow rigid shaft ring (6) includes the end of the hollow rigid shaft ring (6). The end plate is provided with an external connection hole. 9. The cardan shaft and flexible coupling structure according to claim 1, characterized in that: the outer wall of the hollow rigid shaft ring (6) is provided with a first threaded hole (19), and the rigid radial connecting block (7) is provided with a radial second threaded hole (20), and the first threaded hole (19) and the second threaded hole (20) are connected by bolts (21). 10. The universal joint transmission shaft and flexible coupling structure according to claim 1, characterized in that: the axial connecting block (5) is provided with an axial hole (18), and the axial hole (18) is connected with the first method The holes on the flange (10) are connected by bolts (19).

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