阅读说明：本技术 一种传动轴的缓冲连接机构 (Buffer connecting mechanism of transmission shaft ) 是由 钱雪松 于 2019-11-08 设计创作，主要内容包括：本发明公开了一种传动轴的缓冲连接机构,包括主动轴、主动斜齿轮、从动斜齿轮、中间轴、中间轴套、橡胶垫组件、螺钉、从动轴花键套以及从动轴。本发明的橡胶垫组件在原始位置进行预压缩,用于平衡机构的额度传动力矩,当受到冲击力矩作用时,橡胶垫组件进一步压缩,产生轴向位移,对应于周向旋转运动,使得从动轴和主动轴之间产生转速差,延长冲击力矩的传递时间,降低冲击力矩的峰值,有效保护传动轴及传动系统中各零部件的安全。(The invention discloses a buffer connecting mechanism of a transmission shaft, which comprises a driving shaft, a driving helical gear, a driven helical gear, an intermediate shaft sleeve, a rubber pad assembly, a screw, a driven shaft spline sleeve and a driven shaft. The rubber cushion assembly is pre-compressed at an original position and used for balancing the limit transmission torque of the mechanism, when the rubber cushion assembly is subjected to the action of impact torque, the rubber cushion assembly is further compressed to generate axial displacement, and corresponding to circumferential rotation motion, a rotation speed difference is generated between the driven shaft and the driving shaft, the transmission time of the impact torque is prolonged, the peak value of the impact torque is reduced, and the safety of the transmission shaft and each part in a transmission system is effectively protected.)

1. A buffer connecting mechanism of a transmission shaft is characterized by comprising a driving shaft (1), a driving bevel gear (2), a driven bevel gear (3), an intermediate shaft (4), an intermediate shaft sleeve (5), a rubber pad assembly (6), a screw (7), a driven shaft spline sleeve (8) and a driven shaft (9);

the driving shaft (1) and the driving bevel gear (2) form tight fit reliable connection, and the driving bevel gear (2) is meshed with the driven bevel gear (3);

the middle shaft (4) comprises a middle shaft first shaft table (4-1), a middle shaft second shaft table (4-2), a middle shaft third shaft table (4-4) and a rubber pad assembly guide post (4-5); the middle shaft first shaft platform (4-1) and the driven helical gear (3) are in tight fit and reliable connection through a key, the right end of the middle shaft second shaft platform (4-2) is connected with the middle shaft first shaft platform (4-1), the left end of the middle shaft second shaft platform is connected with the right end of the middle shaft third shaft platform (4-4), and the left end of the middle shaft third shaft platform (4-4) is connected with the right end of a rubber pad component guide post (4-5);

a spline is processed on the outer cylindrical surface of the intermediate shaft second platform (4-2) to form an intermediate shaft spline shaft (4-3), a spline groove is processed in an inner hole on the right side of the intermediate shaft sleeve (5) to form an intermediate shaft sleeve internal spline (5-1), the intermediate shaft spline shaft (4-3) and the intermediate shaft sleeve internal spline (5-1) form clearance fit, and the intermediate shaft spline shaft (4-3) axially moves in the intermediate shaft sleeve internal spline (5-1);

a spline is processed on the outer surface of a right-end cylinder of the driven shaft (9) to form a driven shaft spline shaft (9-1);

the driven shaft spline housing (8) comprises a driven shaft spline housing first shaft platform (8-1), a driven shaft spline housing second shaft platform (8-3) and a driven shaft spline housing third shaft platform (8-4); a cylindrical hole is formed in the inner part of the right end of the driven shaft spline housing first boss (8-1) to form a rubber pad assembly seat (8-2), and a rubber pad assembly guide pillar (4-5) can be inserted into the rubber pad assembly seat (8-2); the driven shaft spline housing first boss (8-1) is inserted into the inner hole at the left end of the middle shaft sleeve (5), and the circumferential outer surface of the driven shaft spline housing first boss (8-1) is matched with the inner hole at the left end of the middle shaft sleeve (5); the driven shaft spline housing second shaft platform (8-3) forms an installation flange of a driven shaft spline housing (8), the driven shaft spline housing second shaft platform (8-3) and the middle shaft sleeve (5) are reliably connected through a screw (7), and a driven shaft spline housing internal spline (8-5) is machined inside the driven shaft spline housing third shaft platform (8-4); the driven shaft spline shaft (9-1) and the driven shaft spline sleeve internal spline (8-5) are tightly and reliably connected;

the rubber pad assembly (6) is sleeved on the rubber pad assembly guide post (4-5), the left end of the rubber pad assembly is abutted against the rubber pad assembly seat (8-2), and the right end of the rubber pad assembly is abutted against the third pillow block (4-4) of the intermediate shaft.

2. The cushion connection mechanism of a propeller shaft according to claim 1, wherein: the rubber mat assembly (6) can be replaced by a polyurethane mat assembly or a nylon mat assembly.

Technical Field

The invention relates to a buffer connecting mechanism of a transmission shaft, and belongs to the technical field of machinery.

Background

Most of the existing buffer connecting mechanisms of the transmission shaft are rigid couplings, when the driving shaft is started, impact load is generated under the action of inertia load of the driven shaft, so that a large impact torque is formed, and when the driven shaft is subjected to the action of the impact load, the driving shaft and the driven shaft are rigidly connected, so that the large impact torque is formed. The coupling is abraded greatly, the service life is short, meanwhile, the power of the driving motor and the transmission shaft of the protector cannot be completely transmitted, the work loss is large, and the efficiency is low.

Disclosure of Invention

In order to overcome the defects, the invention provides a buffer connecting mechanism of a transmission shaft, which has the technical scheme that:

a buffer connecting mechanism of a transmission shaft comprises a driving shaft, a driving helical gear, a driven helical gear, an intermediate shaft sleeve, a rubber pad assembly, a screw, a driven shaft spline sleeve and a driven shaft;

the driving shaft and the driving bevel gear form close fit reliable connection, and the driving bevel gear is meshed with the driven bevel gear;

the middle shaft comprises a middle shaft first shaft table, a middle shaft second shaft table, a middle shaft third shaft table and a rubber pad assembly guide post; the middle shaft first shaft platform and the driven helical gear are in tight fit and reliable connection through a key, the right end of the middle shaft second shaft platform is connected with the middle shaft first shaft platform, the left end of the middle shaft second shaft platform is connected with the right end of the middle shaft third shaft platform, and the left end of the middle shaft third shaft platform is connected with the right end of the rubber pad assembly guide post;

a spline is processed on the outer cylindrical surface of the second shaft table of the intermediate shaft to form an intermediate shaft spline shaft, a spline groove is processed on an inner hole on the right side of the intermediate shaft sleeve to form an inner spline of the intermediate shaft sleeve, the intermediate shaft spline shaft and the inner spline of the intermediate shaft sleeve form clearance fit, and the intermediate shaft spline shaft axially moves in the inner spline of the intermediate shaft sleeve;

a spline is processed on the outer surface of a right-end cylinder of the driven shaft to form a driven shaft spline shaft;

the driven shaft spline housing comprises a driven shaft spline housing first shaft platform, a driven shaft spline housing second shaft platform and a driven shaft spline housing third shaft platform; a cylindrical hole is formed in the inner part of the right end of the spline housing first shaft platform of the driven shaft to form a rubber pad assembly seat, and a guide pillar of the rubber pad assembly can be inserted into the rubber pad assembly seat; the driven shaft spline housing first boss is inserted into the inner hole at the left end of the middle shaft sleeve, and the circumferential outer surface of the driven shaft spline housing first boss is matched with the inner hole at the left end of the middle shaft sleeve; the driven shaft spline housing second shaft platform forms an installation flange of a driven shaft spline housing, the driven shaft spline housing second shaft platform and the middle shaft sleeve form reliable connection through screws, and a driven shaft spline housing internal spline is processed inside the driven shaft spline housing third shaft platform; the driven shaft spline shaft and the driven shaft spline sleeve internal spline are in tight and reliable connection;

the rubber pad assembly is sleeved on the guide post of the rubber pad assembly, the left end of the rubber pad assembly abuts against the rubber pad assembly seat, and the right end of the rubber pad assembly abuts against the third shaft table of the intermediate shaft.

The above-described rubber pad assembly can be replaced with a polyurethane pad assembly or a nylon pad assembly.

The invention achieves the following beneficial effects:

the inventive rubber mat assembly is pre-compressed in the initial position for balancing the nominal torque of the damping connection.

In the starting process of the driving shaft, under the action of inertial load of a driven part connected with the driven shaft, the driving shaft can form starting torque far larger than rated torque of the buffer connecting mechanism, the driving shaft drives the driving helical gear to rotate, the driving helical gear and the driven helical gear are meshed with each other, on one hand, the driven helical gear drives the intermediate shaft to rotate through the intermediate shaft first shaft platform, the intermediate shaft drives the driven shaft to circumferentially rotate through the intermediate shaft spline shaft, the intermediate shaft internal spline shaft, the intermediate shaft sleeve, the driven shaft spline sleeve internal spline and the driven shaft spline shaft, on the other hand, the starting torque is far larger than the rated torque of the buffer connecting mechanism, the driving helical gear and the driven helical gear are meshed with each other, axial force formed on the intermediate shaft is larger than pre-compression force of the, the driven helical gear and the intermediate shaft move leftwards together, the driven helical gear axially moves leftwards relative to the driving helical gear, and meanwhile, the intermediate shaft spline shaft axially moves leftwards relative to the spline in the intermediate shaft sleeve;

when the driven shaft and the driven part connected with the driven shaft are driven by the driving shaft, the rotating speed is gradually increased, the inertia moment is gradually reduced, the working moment of the buffer connecting mechanism is also gradually reduced, the middle shaft drives the driven helical gear to move rightwards together under the action of the axial compression force of the rubber pad component, the driven helical gear generates rightward axial movement relative to the driving helical gear, meanwhile, the middle shaft spline shaft generates rightward axial movement relative to a spline in the middle shaft sleeve, a step at the right end of a third shaft platform of the middle shaft gradually abuts against the left side of the inner side of the right end of the middle shaft sleeve, and at the moment, the axial compression force borne by the rubber pad component and the axial force formed by the mutual meshing of the driving helical;

when the working torque of the buffer connecting mechanism is equal to or less than the rated torque, the right end step of the third pillow block of the intermediate shaft gradually abuts against the left side of the inner side of the right end of the intermediate shaft sleeve, and at the moment, the axial compression force applied to the rubber pad assembly is equal to the original pre-compression force;

when the driven part connected with the driven shaft is acted by impact torque and the impact torque is larger than the rated torque of the buffer connecting mechanism, the driven shaft and the driven part connected with the driven shaft drive the middle shaft sleeve to slow down the rotation speed through the driven shaft spline shaft and the driven shaft spline sleeve inner spline, the driving helical gear and the driven helical gear are meshed with each other to form axial compression force which is larger than the precompression force of the rubber pad assembly on the middle shaft, the middle shaft compresses the rubber pad assembly leftwards through the left end step of the middle shaft third shaft platform, the driven helical gear and the middle shaft move leftwards together, the driven helical gear moves leftwards relative to the driving helical gear, meanwhile, the middle shaft spline shaft moves leftwards relative to the middle shaft sleeve inner spline, at the moment, the compression force applied to the rubber pad assembly and the impact torque applied to the driven shaft are balanced through the axial force formed by, in the process, the driving bevel gear and the driven bevel gear generate relative axial displacement in the meshing process and correspond to circumferential rotation motion, so that a rotation speed difference is formed between the driven shaft and the driving shaft, the transmission time of the starting torque is prolonged, the peak value of the starting torque is reduced, and the safety of each part in the transmission shaft and the transmission system is effectively protected.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1, a buffer connecting mechanism of a transmission shaft comprises a driving shaft 1, a driving bevel gear 2, a driven bevel gear 3, an intermediate shaft 4, an intermediate shaft sleeve 5, a rubber pad assembly 6, a screw 7, a driven shaft spline sleeve 8 and a driven shaft 9;

the driving shaft 1 and the driving bevel gear 2 form close fit reliable connection, and the driving bevel gear 2 is meshed with the driven bevel gear 3;

the middle shaft 4 comprises a middle shaft first shaft table 4-1, a middle shaft second shaft table 4-2, a middle shaft third shaft table 4-4 and a rubber pad assembly guide post 4-5; the middle shaft first shaft platform 4-1 and the driven helical gear 3 are in tight fit and reliable connection through a key, the right end of the middle shaft second shaft platform 4-2 is connected with the middle shaft first shaft platform 4-1, the left end of the middle shaft second shaft platform 4-2 is connected with the right end of the middle shaft third shaft platform 4-4, and the left end of the middle shaft third shaft platform 4-4 is connected with the right end of a rubber pad assembly guide pillar 4-5;

a spline is processed on the outer cylindrical surface of the intermediate shaft second shaft platform 4-2 to form an intermediate shaft spline shaft 4-3, a spline groove is processed on the right inner hole of the intermediate shaft sleeve 5 to form an intermediate shaft sleeve internal spline 5-1, the intermediate shaft spline shaft 4-3 and the intermediate shaft sleeve internal spline 5-1 form clearance fit, and the intermediate shaft spline shaft 4-3 axially moves in the intermediate shaft sleeve internal spline 5-1;

a spline is processed on the outer surface of a right-end cylinder of the driven shaft 9 to form a driven shaft spline shaft 9-1;

the driven shaft spline housing 8 comprises a driven shaft spline housing first boss 8-1, a driven shaft spline housing second boss 8-3 and a driven shaft spline housing third boss 8-4; a cylindrical hole is formed in the inner part of the right end of the driven shaft spline housing first boss 8-1 to form a rubber pad assembly seat 8-2, and a rubber pad assembly guide pillar 4-5 can be inserted into the rubber pad assembly seat 8-2; the driven shaft spline housing first boss 8-1 is inserted into the inner hole at the left end of the middle shaft sleeve 5, and the circumferential outer surface of the driven shaft spline housing first boss 8-1 is matched with the inner hole at the left end of the middle shaft sleeve 5; the driven shaft spline housing second shaft platform 8-3 forms an installation flange of the driven shaft spline housing 8, the driven shaft spline housing second shaft platform 8-3 and the middle shaft sleeve 5 are reliably connected through a screw 7, and a driven shaft spline housing internal spline 8-5 is machined inside the driven shaft spline housing third shaft platform 8-4; the driven shaft spline shaft 9-1 and the driven shaft spline sleeve internal spline 8-5 are in tight and reliable connection;

the rubber pad assembly 6 is sleeved on the rubber pad assembly guide post 4-5, the left end of the rubber pad assembly is abutted against the rubber pad assembly seat 8-2, and the right end of the rubber pad assembly is abutted against the middle shaft third shaft table 4-4.

The rubber pad assembly 6 described above can be replaced with a belleville spring.

The inventive rubber pad assembly 6 is pre-compressed in the home position for balancing the nominal torque of the cushion connection.

In the starting process of the driving shaft 1, due to the effect of inertia load of a driven part connected with a driven shaft 9, the driving shaft 1 can form a starting torque far larger than the rated torque of the buffer connecting mechanism, the driving shaft 1 drives the driving helical gear 2 to rotate, the driving helical gear 2 and the driven helical gear 3 are mutually meshed, the driven helical gear 3 drives the intermediate shaft 4 to rotate through the intermediate shaft first shaft platform 4-1 on one hand, the intermediate shaft 4 drives the driven shaft 9 to realize circumferential rotation through the intermediate shaft spline shaft 4-3, the intermediate shaft sleeve internal spline 5-1, the intermediate shaft sleeve 5, the driven shaft spline sleeve 8, the driven shaft spline sleeve internal spline 8-4 and the driven shaft spline shaft 9-1, on the other hand, because the starting torque is far larger than the rated torque of the buffer connecting mechanism, the driving helical gear 2 and the driven helical gear 3 are mutually meshed, the axial, the middle shaft 4 compresses the rubber cushion assembly 6 leftwards through the left end step of the middle shaft third shaft platform 4-4, the driven bevel gear 3 and the middle shaft 4 move leftwards together, the driven bevel gear 3 moves leftwards relative to the driving bevel gear 2, meanwhile, the middle shaft spline shaft 4-3 moves leftwards relative to the middle shaft sleeve internal spline 5-1, at the moment, the compression force applied to the rubber cushion assembly 6 and the axial force formed by the starting torque of the driving shaft 1 meshed on the middle shaft 4 through the driving bevel gear 2 and the driven bevel gear 3 are balanced, in the process, as the driving bevel gear 2 and the driven bevel gear 3 generate relative axial displacement in the meshing process and correspond to circumferential rotation motion, the rotation speed difference is formed between the driven shaft 9 and the driving shaft 1, the transmission time of the starting torque is prolonged, and the peak value of the starting torque is reduced, the safety of the transmission shaft and each part in the transmission system is effectively protected;

when the driven shaft 9 and the driven part connected with the driven shaft are driven by the driving shaft 1, the rotating speed is gradually increased, the inertia moment is gradually reduced, the working moment of the buffer connecting mechanism is also gradually reduced, the middle shaft 4 drives the driven helical gear 3 to move rightwards together under the action of the axial compression force of the rubber pad component 6, the driven helical gear 3 generates the rightwards axial movement relative to the driving helical gear 2, meanwhile, the middle shaft spline shaft 4-3 generates the rightwards axial movement relative to the spline 5-1 in the middle shaft sleeve, the right end step of the middle shaft third shaft platform 4-4 gradually approaches to the left side of the inner side of the right end of the middle shaft sleeve 5, and at the moment, the axial compression force applied to the rubber pad component 6 and the axial force formed by the mutual meshing of the driving shaft 1 and the driven;

when the working torque of the buffer connecting mechanism is equal to or less than the rated torque, the right end step of the middle shaft third shaft platform 4-4 gradually props against the left side of the inner side of the right end of the middle shaft sleeve 5, and at the moment, the axial compression force applied to the rubber pad assembly 6 is equal to the original pre-compression force;

when a driven part connected with the driven shaft 9 is subjected to the action of impact torque and the impact torque is larger than the rated torque of the buffer connecting mechanism, the driven shaft 9 and the driven part connected with the driven shaft drive the middle shaft sleeve 5 to slow down the rotation speed through the driven shaft spline shaft 9-1 and the driven shaft spline sleeve inner spline 8-4, the driving helical gear 2 and the driven helical gear 3 are meshed with each other to form an axial compression force which is larger than the precompression force of the rubber pad assembly 6 on the middle shaft 4, the middle shaft 4 compresses the rubber pad assembly 6 leftwards through the left end step of the middle shaft third shaft platform 4-4, the driven helical gear 3 and the middle shaft 4 move leftwards together, the driven helical gear 3 generates leftward axial movement relative to the driving helical gear 2, and meanwhile, the middle shaft 4-3 generates leftward axial movement relative to, at this moment, the compression force that rubber pad subassembly 6 received and the impact torque that driven shaft 9 received are balanced mutually through the axial force that intermeshing formed on jackshaft 4 between initiative helical gear 2 and the driven helical gear 3, at this in-process, because initiative helical gear 2 and driven helical gear 3 have produced relative axial displacement at the meshing in-process, corresponding to circumferential direction rotary motion, make between driven shaft 9 and the driving shaft 1 form the difference in rotational speed, starting torque's transmission time has been prolonged, starting torque's peak value is reduced, the safety of each spare part in effective protection transmission shaft and the transmission system.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.