JP2017214868A - Complex function device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain torque applied on a shaft in a proper state when a plurality of function parts are coaxially arranged and operated.SOLUTION: In a complex function device 1 comprises: an input shaft 21 to which a drive force generated by a prescribed drive source is inputted; an air compressor 20 to which the drive force of the input shaft 21 is coaxially transmitted, and which exerts a prescribed function; and supply pump 40. In the complex function device, phases of the air compressor 20 and the supply pump 40 are adjusted so that total torque which is obtained by totaling individual torque for driving the air compressor 20 and the supply pump 40 satisfies a prescribed condition, and the air compressor and the supply pump are connected to the input shaft 21.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a composite function device including a plurality of functional units that perform a predetermined function using a driving force transmitted to a shaft, and in particular, a composite including a plurality of functional units arranged coaxially with respect to a shaft. It relates to a functional device.

  Conventionally, in vehicles such as trucks and buses, multiple functions such as an air compressor that supplies compressed air used for air brakes and air suspensions, and a high-pressure fuel supply pump (supply pump) for supplying high-pressure fuel to the engine Some use the driving force of the engine to drive the unit.

  For example, as a technique for using the driving force of an engine for an air compressor and a high-pressure fuel supply pump, the air compressor and the high-pressure fuel supply pump that are driven by a shaft that is rotated by the driving force of the engine can be driven coaxially. There is known a technique for assembling an integrated circuit (see Patent Document 1, for example).

JP 2001-329926 A

  For example, the apparatus size can be reduced by allowing the air compressor and the high-pressure fuel supply pump to be driven coaxially. However, in functional units such as an air compressor and a high-pressure fuel supply pump, the characteristics of torque applied to the driven shaft may differ greatly depending on the structure. For this reason, there is a risk that the driving member such as the shaft or gear for transmitting the driving force may be damaged by applying more torque than necessary, or the torque applied to the shaft is changed from a negative torque to a positive torque. The noise may occur due to contact between the gears.

  The present invention has been made in view of the above problems, and provides a technique capable of maintaining a torque applied to a shaft in an appropriate state when a plurality of functional units are coaxially arranged and driven. With the goal.

  In order to achieve the above object, a multi-function device according to one aspect of the present invention has an input shaft to which a driving force from a predetermined power source is input, and the driving force of the input shaft is transmitted coaxially to have a predetermined function. A multi-function device comprising a plurality of function units to be exhibited, wherein the phase of each function unit is adjusted so that a total torque obtained by summing each individual torque for driving each function unit satisfies a predetermined condition. Connected to the input shaft.

  The multi-function device is configured such that at least one of the functional units temporarily has a negative torque, so that the total torque is reduced so that the total torque becomes a negative torque. The phase may be adjusted.

  Further, in the above-described multi-function device, in a phase range in which one functional unit of each functional unit has a negative torque, a torque in another functional unit has a phase range in which a positive torque cancels out the negative torque. In addition, the phase of each functional unit may be adjusted.

  Further, in the above-described multi-function device, the phase of each functional unit may be adjusted so that the maximum value of the total torque is suppressed.

  Further, in the above-described multi-function device, the phase of the function unit may be adjusted so that the time points when the individual torques of the function units become maximum do not occur at the same time.

  Further, in the above-described multi-function device, the phase of the functional unit may be adjusted so that the average value of the total torque is minimized.

  In the above-described multi-function device, a connection member that coaxially connects the first shaft that drives the first functional part and the second shaft that drives the second functional part among the functional parts, The member is configured to connect the first shaft and the second shaft in a state where the phases of the first shaft and the second shaft are adjusted by an adjustment angle that should be adjusted when the total torque satisfies a predetermined condition. May be.

  Further, in the above multi-function device, a key indicating a predetermined reference angle position of the second shaft is formed on the outer periphery of the end portion of the second shaft connected to the connecting member. A key groove that can be coupled to the key may be formed at a position corresponding to a position rotated by an adjustment angle with respect to a predetermined reference angle position of one shaft.

  Further, in the above composite function device, each functional unit may include an air compressor that supplies compressed air and a fuel supply pump that supplies the internal combustion engine with high pressure.

  According to the present invention, the torque applied to the shaft can be maintained in an appropriate state.

It is a typical lineblock diagram showing the compound function device concerning one embodiment of the present invention. FIG. 2A is an exploded perspective view showing a coupling member according to an embodiment of the present invention. FIG. 2B is a plan view of the supply pump side coupling according to the embodiment of the present invention. FIG. 3A is a schematic diagram of an example of torque characteristics of the air compressor according to the embodiment of the present invention. FIG. 3B is a schematic diagram of an example of torque characteristics of the supply pump according to the embodiment of the present invention. FIG. 3C is a schematic diagram illustrating an example of the torque characteristic of the total torque when the air compressor and the supply pump are driven coaxially.

  Hereinafter, a multi-function device according to an embodiment of the present invention will be described with reference to the accompanying drawings. The same parts are denoted by the same reference numerals, and their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

  FIG. 1 is a schematic configuration diagram showing a multifunction apparatus according to an embodiment of the present invention.

  The multi-function device 10 is provided in a vehicle such as a truck, for example. The multi-function device 10 includes an air compressor 20 that supplies compressed air for air braking in a vehicle, a high-pressure fuel supply pump (supply pump) 40 that supplies compressed fuel to a common rail (not shown), an air compressor 20 and a supply pump 40. Is provided with a coupling member 30 as an example of a connecting member that is coaxially connected to a shaft 21 described later.

  The air compressor 20 is an example of a first functional unit, and includes an input shaft and a shaft 21 as an example of a first shaft, a clan arm 22, a crank pin 23, a connecting rod 24, a cylinder 25, and a piston 26. And a suction pipe 27 and a discharge pipe 28.

  A driving force for causing the air compressor 20 to function is input to the shaft 21. The shaft 21 is connected to the input gear 15 so as to be integrally rotatable. A driving force from an engine (not shown) is transmitted to the input gear 15. Specifically, the input gear 15 is integrated with a gear 11 that is connected to the crankshaft 10 of the engine so as to be integrally rotatable, a first gear 13 of an idle gear 12 that meshes with the gear 11, and a first gear 13. A driving force is transmitted through the second gear 14.

  The crank arm 22 is fixed to the shaft 21 so as to face each other. The crankpin 23 is attached between a pair of opposed crank arms 22.

  The large end portion of the connecting rod 24 is attached to the crank pin 23 in a rotatable state, and the small end portion is attached to a piston pin (not shown) of the piston 26 in a rotatable state.

  The piston 26 is inserted into the cylinder 25 so as to be movable in the vertical direction.

  According to the air compressor 20, when driving force from the engine is transmitted to the shaft 21 through the input gear 15, the shaft 21 rotates and the crank arm 22 fixed to the shaft 21 rotates. As a result, the piston 26 moves up and down in the cylinder 25 through the crank pin 23 and the connecting rod 24 attached to the crank arm 22, and air is sucked from the suction pipe 27 and compressed air compressed by the piston 26. Is discharged from the discharge pipe 28 to an air tank (not shown).

  Since such an operation is performed, the air compressor 20 has a torque characteristic (see, for example, FIG. 2A) in which the required torque varies according to the phase (rotation angle) of the shaft 21. The torque characteristics of the air compressor 20 will be described later.

  The supply pump 40 is an example of a second functional unit, and includes a shaft 41 as an example of a second shaft, a cam 42, a tappet 43, a spring 44, a plunger 46, a plunger barrel 45, and a supply pipe 47. Is provided.

  A key 41A is formed on the outer periphery of the end portion of the shaft 41 on the coupling member 30 side. In the present embodiment, the key 41A is formed at a predetermined reference angular position on the outer periphery of the shaft 41. Although the reference angle position can be set to an arbitrary position, in the present embodiment, for example, the reference angular position is set to the position at which the two cams 42 of the supply pump 40 position the corresponding plunger 46 at the lowest end.

  A cam 42 is fixed to the shaft 41. The tappet 43 is placed so as to contact the cam 42. The spring 44 is mounted between the tappet 42 and the plunger 46. The plunger 46 is inserted into a cylindrical plunger barrel 45 so as to be movable in the vertical direction.

  According to the supply pump 40, when the shaft 41 is rotated, the cam 42 fixed to the shaft 41 is rotated. As a result, the tappet 43 in contact with the cam 42 moves in the vertical direction according to the shape of the cam 42, so that the plunger 46 moves in the plunger barrel 45 in the vertical direction. Thereby, the fuel supplied into the plunger barrel 45 from a fuel metering unit (FMU) (not shown) is compressed and supplied to the common rail via the supply pipe 47.

  Since such an operation is performed, the supply pump 40 has a torque characteristic (for example, refer to FIG. 2B) in which the torque required to drive the shaft 41 in accordance with the phase of the shaft 41 varies. The torque characteristics of the supply pump 40 will be described later.

  The coupling member 30 requires the shaft 21 of the air compressor 20 and the shaft 41 of the supply pump 40 to drive the phase of the shaft 21 in the air compressor 20 and the phase of the shaft 41 of the supply pump 40. The connection is made in a state adjusted so that the total torque obtained by adding the individual torques satisfies a predetermined condition. Note that a method of detecting the relative adjustment angle of the shaft 41 with respect to the shaft 21 for adjusting the phase so that the total torque satisfies a predetermined condition will be described later.

  Here, the predetermined condition may be, for example, at least one of the following conditions (1) to (5). Which condition is to be determined may be determined according to a specific configuration of the multifunction device 1, a configuration for transmitting driving force to the multifunction device 1, or the like.

As a predetermined condition, for example,
(1) The total torque can be reduced from becoming negative torque,
(2) As an example of the condition of (1), in the phase range in which one torque of the air compressor 20 or the supply pump 40 is a negative torque, the other torque is a moving range that is a positive torque that cancels the negative torque; To become a,
(3) The maximum value of the total torque can be suppressed,
(4) As an example of the condition of (3), the time when each individual torque becomes maximum does not occur simultaneously,
(5) The average value of the total torque may be minimized.

  For example, when the phase is adjusted to satisfy the condition (1), the state in which the torque changes from negative to positive between the input gear 15 fixed to the shaft 21 and the second gear 14 is reduced. Thus, it is possible to reduce the generation of abnormal noise due to contact between gears that occurs when the torque changes from negative to positive. In particular, when the condition (2) is satisfied, since the torque does not change from positive to negative, it is possible to prevent generation of abnormal noise due to contact between gears that occurs when the torque changes from negative to positive. .

  Further, when the phase is adjusted so as to satisfy the condition (3), (4), or (5), damage to each part such as the shaft 21 and a gear that transmits the driving force to the shaft 21 is reduced, or The strength required for each of these parts can be reduced.

  Next, the coupling member 30 that connects the shaft 21 of the air compressor 20 and the shaft 41 of the supply pump 40 will be described in detail.

  FIG. 2A is an exploded perspective view showing a coupling member according to an embodiment of the present invention. FIG. 2B is a plan view of the supply pump side coupling according to the embodiment of the present invention. FIG. 2B is a plan view of the supply pump side coupling 33 viewed from the air compressor 20 side.

  2A, the coupling member 30 includes an air compressor side coupling 32 connected to the shaft 21 so as to be integrally rotatable, and a supply pump side coupling 33 connected to the shaft 41 so as to be integrally rotatable. And an intermediate coupling 31 that connects the air compressor side coupling 32 and the supply pump side coupling 33.

  The air compressor side coupling 32 is connected to the shaft 21 via a bolt (not shown). The air compressor side coupling 32 has a connection convex portion 32 </ b> A that can be engaged with a connection concave portion 31 </ b> A described later of the intermediate coupling 31. In the present embodiment, the air compressor side coupling 32 is in a state where a predetermined reference angular position of the shaft 21 (for example, a position that is the uppermost position of the shaft 21 when the piston 26 is at the top dead center) is at the uppermost position. When connected to the shaft 21, as shown in FIG. 2A, the two connecting projections 32A are arranged in a horizontal position.

  The intermediate coupling 31 includes two connection recesses 31 </ b> A that engage with the connection protrusions 32 </ b> A of the air compressor side coupling 32, and two connection recesses 31 </ b> B that engage with a connection protrusion 33 </ b> A (described later) of the supply pump side coupling 33. With. In the present embodiment, the positions of the two connection recesses 31A and the positions of the two connection recesses 31B are rotated 90 degrees to the center of the center axis of the intermediate coupling 31 (corresponding to the center O of the center axis of the shaft 21). It has become a positional relationship.

  The supply pump side coupling 33 corresponds to the connection convex portion 33A that can be engaged with the connection concave portion 31B of the intermediate coupling 31, the shaft mounting hole 33B into which the tip of the shaft 41 is inserted, and the key 41A at the tip of the shaft 41. Keyway 33C. The supply pump side coupling 33 is connected to the shaft 41 so as to be integrally rotatable with a bolt (not shown).

  In the present embodiment, as shown in FIG. 2A, the predetermined reference angle position of the shaft 21 is set by connecting the two connecting convex portions 32A to the intermediate coupling 31 so that they are aligned in a vertical position. It can be connected to the shaft 21 in the uppermost position.

  Here, the position where the key groove 33C is formed will be described. When the key groove 33C is formed on the reference line LA of the shaft mounting hole 33B shown in FIG. 2 (B), the air compressor 20 and the air compressor 20 are in a phase in which the reference angular position of the shaft 41 and the reference angular position of the shaft 21 are matched. The supply pump 40 can be driven.

  In the present embodiment, the rotation is performed on the adjustment line LB rotated by a predetermined adjustment angle about the center O of the shaft 21 with respect to the reference line LA, that is, by the predetermined adjustment angle with respect to the reference angle position of the shaft 21. A keyway 33C is formed at a position corresponding to the position. When the shaft 41 is connected to the supply pump side coupling 33 so that the key 41A engages with the key groove 33C, the reference angle position of the shaft 41 and the reference angle position of the shaft 21 are shifted (rotated) by the adjustment angle. ) In phase, the air compressor 20 and the supply pump 40 can be driven. For example, when the key groove 33C is formed on the adjustment line LB rotated counterclockwise from the reference line LA, the air is moved at a phase in which the reference angle position of the shaft 41 is advanced by the adjustment angle from the reference angle position of the shaft 21. While the compressor 20 and the supply pump 40 can be driven, and the key groove 33C is formed on the adjustment line LB rotated in the clockwise direction from the reference line LA, the reference angular position of the shaft 41 is set to the reference angle position of the shaft 21. The air compressor 20 and the supply pump 40 can be driven at a phase delayed by the adjustment angle from the angular position. The adjustment angle is an angle for adjusting the phase so that the total torque described above satisfies a predetermined condition.

  Next, a method for detecting an adjustment angle for adjusting to a phase that satisfies a predetermined condition will be described.

  FIG. 3A is a schematic diagram of an example of torque characteristics of the air compressor according to the embodiment of the present invention. FIG. 3B is a schematic diagram of an example of torque characteristics of the supply pump according to the embodiment of the present invention. FIG. 3C is a schematic diagram illustrating an example of the torque characteristic of the total torque when the air compressor and the supply pump are driven coaxially.

  First, for each of the air compressor 20 and the supply pump 40, torque characteristics corresponding to the phase of the shaft (21 or 41) are specified by actual measurement or simulation.

  The torque characteristic of the air compressor 20 is specified as shown in FIG. 3A corresponds to the case where the reference angular position of the air compressor 20 is at the uppermost position. The torque of the air compressor 20 is 0 at an angle of 0 degrees, and gradually decreases as the angle increases, becomes a minimum value near 30 degrees, then changes from negative to positive around 60 degrees, and around 240 degrees Gradually increases, reaches a maximum near 300 degrees, and reaches 0 at 360 degrees. The torque for driving the air compressor 20 is negative torque (that is, torque applied from the air compressor 20 to the shaft 21) in the range of 0 degrees to 60 degrees.

  On the other hand, the torque characteristic of the supply pump 40 is specified, for example, as shown in FIG. 3B corresponds to the case where the reference angular position of the supply pump 40 is at the uppermost position. The torque of the supply pump 40 is a positive torque at 0 degrees, increases near 60 degrees, reaches a maximum value near 105 degrees, reaches a minimum value near 150 degrees, increases near 240 degrees, and increases to 285 The maximum value is in the vicinity of degrees, and the minimum value is in the vicinity of an angle of 330 degrees. The torque of the supply pump 40 is always positive.

  Next, the total torque characteristic is obtained by adding the torque characteristic of the specified air compressor 20 and the torque characteristic of the supply pump 40 together. Furthermore, the torque characteristics of the air compressor 20 and the torque characteristics of the supply pump 40 are added together with their respective reference angular positions shifted by a predetermined angle, so that the total torque characteristics when the phase is shifted by a predetermined angle are added. Is identified. After that, by gradually changing the phase shift angle, the characteristics of the total torque corresponding to each of the shift angle changes are specified.

  Based on the characteristics of the plurality of total torques obtained in this way, those satisfying a predetermined condition are specified, and the shifted angle at that time is specified. This angle is an angle (adjustment angle) for adjusting the phase of the air compressor 20 and the phase of the supply pump 40, that is, an angle for adjusting the relative angle between the reference angle position of the air compressor 20 and the reference angle position of the supply pump 40. It becomes.

  According to the detection method described above, for example, when the torque characteristic of the air compressor 20 is in the state shown in FIG. 3A and the torque characteristic of the supply pump 40 is in the state shown in FIG. For example, the adjustment angle satisfying the conditions (1) and (2) can be detected as, for example, 60 degrees as shown in FIG. In this case, the coupling member 30 is created and the shaft 41 and the shaft 21 are connected so that the reference angle position of the air compressor 20 has a phase delayed by 60 degrees from the reference angle position of the supply pump 40. do it. When the shaft 41 and the shaft 21 are connected in this way, as shown in FIG. 3C, the total torque is always a positive torque, and a state of a negative torque can be prevented from occurring.

  As described above, according to the multifunction apparatus 1 according to the present embodiment, the total torque obtained by summing the individual torques for driving the air compressor 20 and the supply pump 40 satisfies a predetermined condition. Since the phases of the air compressor 20 and the supply pump 40 are adjusted and connected to the input shaft 21, they are generated between the input shaft 21 and the input gear 15 and the second gear 14 of the idle gear 12. The torque fluctuation can be made appropriate. For example, by reducing the total torque from becoming negative torque, it is possible to prevent the input gear 15 from being damaged and to reduce the generation of noise due to the contact between the input gear 15 and the second gear 14. . Further, by making it possible to suppress the maximum value of the total torque, it is possible to reduce the damage to the drive members related to the transmission of the drive force from the crankshaft 10 to the input shaft 21 or to be necessary for these drive members. The strength can be reduced.

  In addition, this invention is not limited to the above-mentioned embodiment, In the range which does not deviate from the meaning of this invention, it can change suitably and can implement.

  For example, in the above embodiment, the engine is taken as an example of the power source. However, the present invention is not limited to this, and the power source may be an electric motor or a hydraulic motor.

  In the above-described embodiment, the air compressor and the supply pump are shown as examples of the function unit. However, the present invention is not limited to this, and the function unit used in the vehicle includes an alternator that generates electric power and a power steering. Pump for supplying hydraulic pressure, water pump for circulating cooling water, fan for cooling engine etc., compressor for operating air conditioner, refrigeration for operating refrigerator mounted on vehicle Any of compressors for machines may be used.

  In the above embodiment, an example is shown in which two functional units are coaxially driven. However, the present invention can also be applied to a case where three or more functional units are coaxially driven. When three or more functional units are driven coaxially, the individual torque of each functional unit is specified, and for each individual torque, the total torque in a plurality of cases shifted in phase is detected, and based on these total torques, What is necessary is just to specify the adjustment angle about a function part.

  Further, in the above embodiment, when the functional units are connected coaxially, the shafts in the respective functional units are connected so as to have the same rotational speed. However, the present invention is not limited to this, for example, the function A connecting member that connects the parts may be provided with a gear mechanism so that the number of rotations of the shaft varies between the functional parts.

DESCRIPTION OF SYMBOLS 1 Multifunctional device 10 Crankshaft 11 Gear 12 Idle gear 13 1st gear 14 2nd gear 15 Input gear 20 Air compressor 21 Shaft 22 Crank arm 23 Crankpin 24 Connecting rod 25 Cylinder 26 Piston 27 Suction pipe 28 Discharge pipe 30 Coupling Member 31 Intermediate coupling 31A, 31B Connection recess 32 Air compressor side coupling 32A Connection projection 33 Supply pump side coupling 33A Connection projection 33B Shaft mounting hole 33C Keyway 40 Supply pump 41 Shaft 42 Cam 43 Tappet 44 Spring 45 Plunger Barrel 46 Plunger 47 Supply pipe

Claims (9)

A multi-function device comprising: an input shaft to which a driving force from a predetermined power source is input; and a plurality of functional units that transmit the driving force of the input shaft coaxially to perform a predetermined function,
A multi-function device in which the phase of each functional unit is adjusted and connected to the input shaft such that a total torque obtained by adding the individual torques for driving the functional units satisfies a predetermined condition. At least one of the functional units is configured to temporarily have a negative torque,
The composite function device according to claim 1, wherein the phase of each functional unit is adjusted so as to reduce the total torque from being a negative torque. In each of the functional units, the functional unit has a phase range in which the negative torque is negative, and the functional unit has a phase range in which the torque of the other functional unit is a positive torque that cancels the negative torque. The multi-function device according to claim 2, wherein the phase of the multi-function device is adjusted. 4. The multi-function device according to claim 1, wherein the phase of each functional unit is adjusted so that the maximum value of the total torque is suppressed. 5. The multi-function device according to claim 4, wherein the phases of the function units are adjusted so that the time points at which the individual torques of the function units become maximum do not occur simultaneously. The multi-function device according to any one of claims 1 to 5, wherein the phase of the functional unit is adjusted so that an average value of the total torque is minimized. A connecting member that coaxially connects a first shaft that drives a first functional part of the functional parts and a second shaft that drives the second functional part;
The connecting member has the first shaft and the second shaft in a state in which the phases of the first shaft and the second shaft are adjusted by an adjustment angle to be adjusted when the total torque satisfies a predetermined condition. The multi-function device according to any one of claims 1 to 6, wherein the multi-function device is configured to be connected to each other. A key indicating a predetermined reference angular position of the second shaft is formed on an outer periphery of an end portion of the second shaft that is connected to the connection member,
The key groove that can be coupled to the key is formed in the connection member at a position corresponding to a position rotated by the adjustment angle with respect to a predetermined reference angle position of the first shaft. The multifunction device described. 9. The multi-function device according to claim 1, wherein each of the functional units includes an air compressor that supplies compressed air and a fuel supply pump that supplies the fuel of the internal combustion engine at a high pressure.

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