WO2013034095A1 - Coupled and tuned belt-pulley - Google Patents

Abstract

A coupled and tuned belt-pulley comprising a belt-pulley (1), a core shaft (3), an inner torsion spring (4), and an outer torsion spring (6). The inner torsion spring (4) and the outer torsion spring (6) rotate oppositely. The belt-pulley (1) is concentrically sleeved on the core shaft (3). The inner torsion spring (4) is sleeved on the core shaft (3). The outer torsion spring (6) is sleeved on the inner torsion spring (6). The belt-pulley (1) is allowed to transmit via the inner torsion spring (4) a driving force outputted by an engine to the core shaft (3) to drive an alternator. The core shaft (3) is allowed to transmit via the outer torsion spring (6) a driving force outputted by the alternator to the belt-pulley (1) to drive the engine. The coupled and tuned belt-pulley solves the technological problems in single-body machine of increased vibration, abnormal noise, unideal service life of gear train.

Description

 Coupling Tuning Pulley The present invention claims to be submitted to the State Intellectual Property Office of China on September 6, 2011, with the application number 201110262126.2, entitled "Coupled Tuning Pulley" and submitted to the State Intellectual Property Office of China on September 6, 2011. No. 201120331263.2, the priority of the Chinese patent application entitled "Coupled Tuning Pulley". Technical field

 The invention relates to the field of pulley technology, and more particularly to a coupled tuning pulley. Background technique

 The system immediately sets up the standby state for the car. When the vehicle is in the "idle" state (red light or traffic jam), the driver will automatically turn off the engine and switch to the standby state as long as the driver continues to brake the brake pedal; The vehicle will automatically ignite, restart, and no noise. The system can greatly reduce energy consumption and carbon dioxide emissions. When the system is at a standstill, the car automatically enters a fuel-saving state and does not emit any gas. The on-the-fly system can reduce energy consumption and carbon dioxide emissions by about 10% under urban conditions. This can be achieved when traffic is severely congested.

15%, can reduce by 6% under comprehensive conditions.

 As hybrid vehicles can help save energy, reduce CO2 emissions, and increase comfort, market demand is increasing.

There are two ways to achieve immediate stop-and-go. In the first mode, the vehicle has a starter, an electric control system, a battery, a generator (charging the battery); another way, the vehicle has a generator, an electronic control system, a battery, That is to say, there is no starter in this way, and the generator has a starting function while having a power generating function, that is, starting and stopping the integrated machine. The start-stop integrated machine puts higher requirements on the entire train of the engine. When the generator is used as a starter, it needs more torque than the general engine drag generator, then the vibration of the train and the belt The force is also much higher, so the shock absorption function of the pulley on the generator is particularly important.

Summary of the invention

 The technical problem to be solved by the present invention is: In order to solve the technical problem that the vibration of the existing start-stop integrated machine is large and the life of the train wheel is not ideal, the present invention provides a coupled tuning pulley, which can effectively reduce the vibration of the start-stop integrated machine and Improve the life of the wheel train.

 The technical solution adopted by the present invention to solve the technical problem thereof is: a coupled tuning pulley comprising a pulley coupled to the engine, a mandrel coupled to the generator, an inner torque spring and an outer torque spring; an inner torque spring and an outer torque spring The pulley is concentrically fitted on the mandrel, the inner torque spring is set on the mandrel, and the outer torque spring is set on the inner torque spring; the pulley can transmit the power output from the engine to the mandrel through the inner torque spring, and drive the generator The mandrel can transmit the power output from the generator to the pulley through the external torque spring to drive the engine.

The pulley is concentrically fitted on the mandrel, the inner torque spring is set on the mandrel, and the outer torque spring is set on the inner torque spring; the coupling tuning pulley of the present invention is compact. Since the inner torque spring and the outer torque spring rotate in opposite directions, in the start mode, the generator drives the engine to rotate through the coupled tuning pulley, and the generator power output, the generator and the mandrel of the coupled tuning pulley transmit power through the external torque spring. To the pulley, the pulley then transmits power to the engine through the belt to achieve engine starting. In the normal working mode, the engine drives the generator to rotate, the engine power output, and the power is transmitted to the pulley through the belt, and the pulley transmits the power to the mandrel through the inner torque spring, the mandrel and The generator shaft is coupled to transfer power to the generator, to generate electricity from the generator, and to store electrical energy to the battery. The internal torque spring and the external torque spring transmit power, which can effectively reduce the vibration of the start-stop machine and improve the life of the train.

 The mandrel is further provided with a cage; the cage is fixedly coupled with the pulley or integrated structure, the cage is axially restrained by the axial limiting member, the mandrel has a positioning shoulder, the inner torque spring and the external torque The springs are located between the retainer and the positioning shoulder, and both ends of the inner torsion spring and the outer torsion spring are coupled to the retainer and the positioning shoulder, respectively.

 The retainer has a retainer inner torsion spring retaining structure for retaining an inner torsion spring and an outer torsion spring and a retainer outer torsion spring retaining structure; the mandrel has a mandrel for retaining the inner torsion spring and the outer torsion spring Torque spring retention structure and mandrel outer torque spring retention structure.

 In order to achieve a simple structure, easy to manufacture, and at the same time, it can reduce the noise during the working process and reduce the vibration shock. The inner spring of the torsion spring is maintained on the end surface of the positioning shoulder and the inner torque spring, and the inner torque The end of the spring is adapted to the inner shaft of the torsion spring helical step, the outer core torsion spring retaining structure is located on the end surface of the positioning shoulder contacting the outer torque spring, and is adapted to the end of the outer torque spring The outer core torque spring spiral step; the inner torque spring retaining structure of the cage is a torque spring spiral step in the cage which is located on the end surface of the cage contacting the inner torque spring and is adapted to the end of the inner torque spring The retainer outer torque spring retaining structure is a cage outer torque spring spiral step that is located on an end surface of the retainer that is in contact with the outer torque spring and that is adapted to the end of the outer torque spring.

 In order to effectively prevent the axial preload of the spring from transmitting outward, it is ensured that the axial preload of the spring is closed between the mandrel and the cage. The axial limiting member is a snap spring.

In order to avoid the wheel train working, the inner torque spring and the outer torque spring are damaged by the radial force, Right and left support bearings are mounted on both ends of the mandrel. The radial force transmitted by the engine to the pulley through the belt is received by the right and left support bearings mounted at both ends of the mandrel.

 The right support bearing and the left support bearing are both ball bearings. Ball bearings can not only withstand radial forces, but also withstand axial forces caused by belt eccentric wear or assembly, thus increasing product life.

 The inner ring of the right support bearing has an interference fit with the mandrel, the outer ring of the right support bearing has an interference fit with the pulley; the inner ring of the left support bearing has an interference fit with the mandrel, and the outer ring of the left support bearing and the cage Interference fit.

 The inner ring of the right support bearing has an interference fit with the mandrel, and the outer ring of the right support bearing has an interference fit with the pulley; the inner ring of the left support bearing has an interference fit with the mandrel, and the outer ring of the left support bearing and the pulley pass Fit.

 The cage is in an interference fit with the pulley or is splined or pinned.

 lmnTlmm。 The spline groove on the outer surface of the cage has a tooth height of 0. lmnTlmm.

 The beneficial effects of the present invention are that the coupled tuning pulley of the present invention can effectively reduce the vibration of the start-stop integrated machine and increase the life of the train. DRAWINGS

 The invention will now be further described with reference to the drawings and embodiments.

 1 is a schematic structural view of Embodiment 1 of a coupled tuning pulley of the present invention;

 Figure 2 is a three-dimensional structural view of a mandrel of Embodiment 1 of the present invention;

 Figure 3 is a schematic structural view of a pulley of Embodiment 1 of the present invention;

Figure 4 is a three-dimensional structural view of a cage of Embodiment 1 of the present invention; Figure 5 is a plan view of a holder according to Embodiment 1 of the present invention;

 Figure 6 is a schematic structural view of an axial stopper of Embodiment 1 of the present invention;

 Figure 7 is a three-dimensional exploded view of the starting mode of Embodiment 1 of the present invention, and the broken line indicates that the power transmission diagram 8 is a three-dimensional explosion diagram of the normal operation mode of Embodiment 1 of the present invention, and the broken line indicates the power transmission;

 Figure 9 is a schematic structural view of Embodiment 2 of the present invention;

 Figure 10 is a full sectional view of a pulley of Embodiment 2 of the present invention;

 Figure 11 is a full sectional view of a holder of Embodiment 2 of the present invention;

 Figure 12 is a three-dimensional exploded view of the starting mode of Embodiment 2 of the present invention, and the broken line indicates the power transmission. Figure 13 is a three-dimensional exploded view of the normal operation mode of Embodiment 2 of the present invention, and the broken line indicates the power transmission;

 Figure 14 is a schematic structural view of Embodiment 3 of the present invention;

 Figure 15 is a full sectional view of a pulley of Embodiment 3 of the present invention;

 Figure 16 is a view showing the structure of a cage of Embodiment 3 of the present invention ^

 Figure 17 is a schematic view showing the structure of Embodiment 4 of the present invention;

 Figure 18 is a full sectional view of a holder of Embodiment 4 of the present invention;

 Figure 19 is a schematic structural view of Embodiment 5 of the present invention;

 Figure 20 is a full sectional view of a pulley of Embodiment 5 of the present invention;

In the figure: 1. Pulley, 11. Pulley locating pin hole, 2. Right support bearing, 3. Mandrel, 31. Positioning shoulder, 32. Torsion spring spiral step in mandrel, 321. Mandrel inner step surface, 33 . Mandrel outer torque spring Spiral step, 331. outer shaft step surface, 4. inner torque spring, 5. cage, 51. torque spring spiral step in the cage, 511. retainer inner step surface, 52. retainer outer torque spring spiral step, 521. Cage outer step surface, 55. Cage positioning pin hole, 56. Mounting sleeve, 6. External torque spring, 7. Left support bearing, 8. Axial limit member, 9. Locating pin. detailed description

 The invention will now be described in further detail with reference to the drawings.

 Embodiment 1 of the coupled tuning pulley of the present invention as shown in FIG. 8 includes a pulley 1 coupled to the engine, a mandrel 3 coupled to the generator, a cage 5, a left support bearing 7, and a right support bearing 2. The torque spring 4, the outer torque spring 6 and the axial limiting member 8, the axial limiting member 8 is a snap spring.

 The pulley 1, the outer torque spring 6, the inner torque spring 4 and the mandrel 3 are concentrically fitted from the outside to the inside; the inner torque spring 4 and the outer torque spring 6 are oppositely rotated.

 The cage 5 is fitted on the mandrel 3; the cage 5 is interference-fitted with the pulley 1, and the cage 5 limits the axial relative position of the cage 5 to the mandrel 3 by the axial stopper 8, and the mandrel 3 has positioning The shoulder 31, the inner torsion spring 4 and the outer torsion spring 6 are both located between the cage 5 and the positioning shoulder 31.

 The inner ring of the right support bearing 2 has an interference fit with the mandrel 3, the outer ring of the right support bearing 2 has an interference fit with the pulley 1; the inner ring of the left support bearing 7 has an interference fit with the mandrel 3, and the left support bearing Ί The ring cooperates with the pulley 1 for interference.

 The retainer 5 has an in-clamp torque spring retaining structure and a retainer outer torque spring retaining structure for holding the inner torsion spring 4 and the outer torsion spring 6; the mandrel 3 has a retaining inner torque spring 4 and an outer torque spring 6 core In-shaft torque spring retention structure and mandrel outer torque spring retention structure.

As shown in FIG. 2, the in-core torque spring retaining structure is located at the positioning shoulder 31 and the inner torque spring 4 a mandrel inner torsion spring spiral step 32 on the end face of the contact, adapted to the end of the inner torsion spring 4, the mandrel outer torsion spring retaining structure is located on the end face of the positioning shoulder 31 in contact with the outer torsion spring 6, The end of the outer torsion spring 6 is adapted to the outer core torsion spring spring step 33; the in-clamp torque spring retaining structure is located on the end face of the cage 5 in contact with the inner torsion spring 4, and the end of the inner torsion spring 4 The adapted cage inner torsion spring step 51, the cage outer torsion spring retaining structure is on the end face of the cage 5 in contact with the outer torsion spring 6, and the outer torque of the cage is adapted to the end of the outer torsion spring 6 Spring spiral step 52.

 The mandrel inner step surface 321 of the mandrel inner torque spring step 321 and the mandrel outer torque spring table 33 have an outer core step surface 331 which is circumferentially offset.

 As shown in Fig. 4, the inner step surface 511 of the cage of the torque spring spiral step 51 in the cage and the outer step surface 521 of the cage outer spiral spring step 52 are circumferentially offset;

 As shown in Fig. 5, in the figure, a is the spiral starting position of the outer torque spring step 52 of the cage, and a' is the screw end position of the outer helical spring step 52 of the cage, that is, the outer torque spring of the cage The outer step surface 521, b of the step 52 is the spiral starting position of the torque spring spiral step 51 in the cage, and b' is the screw end position of the torque spring spiral step 51 in the cage, that is, the torque spring in the cage In the holder inner step surface 511 of the spiral step 51, the holder inner step surface 511 is offset in the clockwise direction with respect to the holder outer step surface 521 by an angle α of 8°.

As shown in Fig. 7, in the starting mode, the generator drives the engine to rotate, the generator power output, the generator and the mandrel 3 transmit power to the mandrel 3 through a threaded connection, and the mandrel 3 passes the mandrel outer torque spring spiral step 33 transmits the power to the external torque spring 6, and the external torque spring 6 transmits the power to the cage 5 through the outer torque spring step 52 of the cage, while the outer torque spring 6 produces a deformation outer diameter that increases, and the pulley 1 The hole generates friction to transmit power to the pulley 1 while the cage 5 and the belt The wheel 1 is an interference fit, and the power of the outer torque spring 6 is better transmitted to the pulley 1. The pulley 1 then transmits power to the engine through the belt.

 As shown in Fig. 8, in the normal working mode, the engine drives the generator to rotate, the engine power output, and the power is transmitted to the pulley 1 through the belt, and the pulley 1 and the cage 5 are interference fit, so that the pulley 1 transmits power to the pulley 1 The retainer 5 transmits the power to the inner torsion spring 4 through the torsion spring helical step 51 in the cage, and the inner torque spring 4 transmits the power to the torsion spring spiral step 32 in the mandrel of the mandrel 3, that is, the transmission Upon reaching the mandrel 3, the mandrel 3 is threadedly coupled to the generator shaft to transfer power to the generator.

 The embodiment 2 of the coupled tuning pulley of the present invention shown in FIGS. 9 to 13 is different from the first embodiment in that the retainer 5 is pinned to the pulley 1; the end faces of the pulley 1 and the retainer 5 are in contact with each other. There are three pulley positioning pin holes 11 and three cage positioning pin holes 55, three positioning pins 9, and one end of the positioning pin 9 is inserted into the pulley positioning pin hole 11 and the other end is inserted into the cage positioning pin hole 55. The number and diameter of the positioning pins 9 are calculated based on the torque that needs to be transmitted.

 The embodiment 3 of the coupled tuning pulley of the present invention shown in FIGS. 14-16 differs from the first embodiment in that the retainer 5 and the pulley 1 are spline-coupled; the spline groove depth on the inner surface of the pulley 1 is 0. 5mm。 The height of the spline of the outer surface of the outer surface of the 0. 5mm.

 Embodiment 4 of the coupled tuning pulley of the present invention as shown in FIGS. 17 to 18 differs from Embodiment 1 in that the outer end of the retainer 5 has a mounting sleeve 56 that is interference-fitted with the outer ring of the left support bearing 7, The outer diameter of the frame 5 is the same, and the cage 5 is interference-fitted with the pulley 1. This structure lengthens the length of the interference fit between the cage 5 and the pulley 1, thereby improving the reliability of the combination.

 The embodiment 5 of the coupled tuning pulley of the present invention shown in Figs. 19 to 20 differs from the first embodiment in that the retainer 5 and the pulley 1 are integrally formed; the transmission torque is more reliable.

Claims

Claim 1. A coupled tuning pulley, comprising: a pulley (1), a mandrel (3), an inner torque spring (4) and an outer torque spring (6); an inner torque spring (4) and an outer torque spring (6) The opposite direction of rotation; the pulley (1) is placed concentrically on the mandrel (3), the inner torsion spring (4) is placed on the mandrel (3), and the outer torsion spring (6) is placed on the inner torsion spring (4) ;  The pulley (1) can transmit the power output from the engine to the mandrel (3) through the internal torque spring (4) to drive the generator;  The mandrel (3) can transmit the power output from the generator to the pulley (1) through the external torque spring (6) to drive the engine.  2. A coupled tuning pulley according to claim 1, wherein: said mandrel (3) is further provided with a cage (5); the cage (5) is fixedly coupled to the pulley (1) or As a one-piece structure, the cage (5) is axially restrained by the axial limiting member (8), the mandrel (3) has a positioning shoulder (31), an inner torque spring (4) and an outer torque spring (6) Both are located between the cage (5) and the positioning shoulder (31), and both ends of the inner torsion spring (4) and the outer torsion spring (6) are coupled to the retainer (5) and the positioning shoulder (31), respectively.  3. A coupled tuning pulley according to claim 2, wherein: said retainer (5) has a cage inner torsion spring for retaining the inner torsion spring (4) and the outer torsion spring (6) The retaining structure and the retainer outer torque spring retaining structure; the mandrel (3) has an in-core torque spring retaining structure and a mandrel outer torque spring retaining structure for retaining the inner torsion spring (4) and the outer torsion spring (6). 4. A coupled tuning pulley according to claim 3, wherein: said in-core torque spring retaining structure is located on an end face of the positioning shoulder (31) in contact with the inner torque spring (4), a mandrel inner torsion spring helical step (32) adapted to the end of the inner torsion spring (4), the mandrel outer torsion spring retaining structure being located at the positioning shoulder (31) and the outer torsion spring (6) a mandrel outer torque spring spiral step (33) on the end face of the contact, which is adapted to the end of the outer torque spring (6); the inner torque spring retaining structure of the cage is located in the cage (5) and the inner torque On the end face of the contact of the spring (4), a torque spring spiral step (51) in the cage adapted to the end of the inner torque spring (4), the cage outer torque spring retaining structure is located in the cage (5) The outer torque spring step (52) on the end face that is in contact with the outer torsion spring (6) and the end of the outer torsion spring (6).  5. A coupled tuning pulley according to claim 2, wherein: said axial limiting member (8) is a snap spring.  6. A coupled tuning pulley according to claim 2, characterized in that: the right support bearing (2) and the left support bearing (7) are mounted at both ends of the mandrel (3).  7. A coupled tuning pulley according to claim 6, wherein: said right support bearing (2) and left support bearing (7) are ball bearings.  8. A coupled tuning pulley according to claim 6, wherein: the inner ring of the right support bearing (2) has an interference fit with the mandrel (3) and the outer ring of the right support bearing (2) An interference fit with the pulley (1); the inner ring of the left support bearing (7) has an interference fit with the mandrel (3), and the outer ring of the left support bearing (7) has an interference fit with the cage (5).  9. A coupled tuning pulley according to claim 6, wherein: the inner ring of the right support bearing (2) has an interference fit with the mandrel (3) and the outer ring of the right support bearing (2) An interference fit with the pulley (1); the inner ring of the left support bearing (7) has an interference fit with the mandrel (3), and the outer ring of the left support bearing (7) has an interference fit with the pulley (1). 10. A coupled tuning pulley according to claim 2, wherein: said protection The holder (5) has an interference fit with the pulley (1) or is splined or pinned.  The splined groove on the inner surface of the pulley (1) has a depth of 0. lmnTlmm; splines on the outer surface of the cage (5). The height of the tooth is 0. lmm~lmm.