JP3244759B2 - Swash plate type reduction gear and swash plate type axial piston pump device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive mechanism for a compressor for general industrial machines or vehicles, for example.
About swash plate type speed reducer and a swash plate type axial piston pump apparatus.

[0002]

2. Description of the Related Art Swash plate type reduction gears and swash plate type axial gears
The essential part of the stone pump device is in the joint mechanism. There are the following known art examples of a conventional universal joint and an apparatus using the same.

[0003] 1. Universal joint (Japanese Patent Application Laid-Open No. 63-13921) In this prior art, a pair of drive pins rotatably held by a ball head on a drive shaft are provided on a driven shaft, the drive pin having an open rear. One center guide pin that slides through the insertion hole and is also rotatably held by the ball head on the drive shaft and keeps the drive shaft and the driven shaft concentric, is provided between both drive pins,
The center guide pin slides in a center guide pin insertion hole provided in the driven shaft. This provides a simple and reliable torque transmission structure.

[0004] 2. Universal joint (Japanese Patent Application Laid-Open No. 63-308220) In this prior art, a pair of drive pins is provided between a drive shaft and a driven shaft with a guide pin interposed therebetween, as in the prior art. The portion where the ball head is inserted is a U-shaped slide groove. This provides a structure in which the drive pin can move in the radial direction, absorbs the displacement of the pitch diameter of the drive pin even when the inclination angle of the drive shaft changes, and can transmit a large torque.

[0005] 3. Compressor (Japanese Patent Laid-Open No. 63-309785) In this conventional technique, a pair of drive pins are buried and installed on a diagonal line of an end surface of a cylinder block, and the drive pins are movable on the drive pins in a drive groove provided in a piston support in a radial direction. The torque is transmitted between the cylinder block and the piston support by a spherical bearing movably supported on the cylinder block.

[0006] 4. Constant velocity joint and axial piston pump / motor device using the joint (Japanese Patent Application No. 2-129088) This joint in the prior art includes a drive pin having a spherical head similar to those of the first and second known examples. And at least three driven shafts are inserted and arranged via compression springs. Accordingly, even if the inclination angle between the drive shaft and the driven shaft changes, all the drive pins always move on the same circumference and can transmit rotation at a constant speed, thereby reducing vibration and noise. A similar effect can be obtained in an axial piston pump / motor device using this joint.

[0007]

The above-mentioned known techniques have the following problems.

[0008] 1 known example of to 3 is driving the per rotary drive shaft 1
Rotation cannot be transmitted at a constant speed because the speed change occurs twice in the moving shaft . Therefore, there is a problem of vibration, noise or pulsation.

In the known example 4, constant speed transmission is ensured by displacement of the drive pin using a compression spring, and a delicate displacement error of each spring is likely to occur, so that certainty of the constant speed is low.
In addition, the structure becomes complicated and the assembling property is poor.

SUMMARY OF THE INVENTION An object of the present invention is to provide a swash plate type speed reducer and a swash plate type speed reducer having high assurance of constant velocity, low vibration and noise and good assemblability.
An object of the present invention is to provide a plate-type axial piston pump device.

[0011]

In order to achieve the above object, the present invention provides an input shaft and an output shaft which are arranged on the same axis, a rotary swash plate which rotates integrally with the input shaft, and A driven plate that is supported by the swash plate and swings and rotates with a fixed inclination angle with respect to the output shaft by the rotation of the rotary swash plate; and the driven plate rotates with the rotation of the driven plate to rotate the driven plate. A swash plate type speed reducer having a rotation transmitting means for transmitting to an output shaft, wherein the rotary swash plate has a first annular swash plate on an outer peripheral side and a second annular swash plate on an inner peripheral side; The plate supports the driven plate so that the driven plate swings and rotates with the fixed inclination angle by the rotation of the rotary swash plate, and the second annular swash plate supports the fixed plate with respect to the output shaft. Has an inclination angle of about 1/2 of the inclination angle of the rotation transmission means, A plurality of drive pins for connecting the drive plate and said output shaft in the rotational direction, the plurality of driving pins, respectively, of the insertion into the insertion hole formed in the output shaft
And a compression spring is provided at one end in the insertion hole.
A ball head is provided at the other end of the plurality of drive pins, and the ball head is
It is arranged slidably in the insertion hole in which the provided to the driven plate
This allows the driven plate to rotate through the drive pin before
None to transmit to the serial output shaft, and wherein this ball head portion
It is assumed that a distal end protruding portion which comes into contact with the second annular swash plate by being pressed by a compression spring is provided.

Further, the present invention provides an input shaft supported at both ends, a cylinder barrel rotating integrally with the input shaft, a piston reciprocating in a cylinder bore formed with the cylinder barrel, and a connection to the piston. A driven plate that converts the rotation of the cylinder barrel into a linear motion of the piston, a fixed swash plate that supports the driven plate with a fixed inclination angle with respect to the input shaft, and rotates with the rotation of the cylinder barrel. A swash plate type axial piston pump device having a rotation transmitting means for transmitting the rotation of the cylinder barrel to the driven plate, wherein the fixed swash plate is a first annular swash plate on an outer peripheral side and a second annular swash plate on an inner peripheral side. And the first annular swash plate supports the driven plate such that the driven plate swings and rotates with the fixed inclination angle by rotation of the cylinder barrel. The second annular swash plate has an inclination angle of about の of the constant inclination angle with respect to the input shaft, and the rotation transmitting means includes a cylinder barrel, the driven plate, a has a plurality of drive pins coupled to the rotational direction, the plurality of driving pins respectively, said Shirindaba
Inserted into the insertion hole provided in the barrel and in the insertion hole
A compression spring is provided on the integrated side,
A ball head is provided on the end side, and the ball head is provided on the driven plate .
The cylinder is slidably arranged in the insertion hole
The rotation of the barrel is transmitted to the driven plate via the drive pin.
And press the ball head with the compression spring.
In this case, a distal end protruding portion which comes into contact with the second annular swash plate is provided.

[0013]

In the swash plate type speed reducer of the present invention configured as described above, the rotary swash plate is composed of the outer first swash plate and the inner swash plate.
A second annular swash plate, and the first annular swash plate is a rotary swash plate.
Due to the rotation, the driven plate has a certain inclination angle with respect to the output shaft.
The driven plate is supported so as to swing and rotate, and the second annular swash plate is supported.
May have a tilt angle of about half the size of the fixed tilt angle relative to the axis, rotation transmitting means have a plurality of drive pins for connecting the output unit and the driven plate in the rotational direction And this multiple
Drive pins can slide freely into the insertion holes of the driven plate
And a second annular ring on the ball head
By providing the tip projection that contacts the swash plate, the power transmission point of the rotation transmission means always exists on a plane that bisects the intersection angle between the rotation axis of the driven plate and the axis of the output shaft, The rotation transmitting means is a constant velocity joint. Therefore, since the input shaft and the driven plate and the driven plate and the output shaft each transmit rotation at a constant speed, the input shaft and the output shaft also transmit rotation at a constant speed.

In the swash plate type axial piston pump device of the present invention, the fixed swash plate is the first annular swash plate on the outer peripheral side.
And a second annular swash plate on the inner peripheral side.
The driven plate is fixed to the input shaft by rotating the barrel
The driven plate is supported to swing and rotate with the inclination angle of
The second annular swash plate has a fixed inclination angle of about 1 /
Have a tilt angle of the second size, rotation transmitting means may have a plurality of drive pins for connecting the cylinder barrel and the driven plate in the rotational direction, the plurality of driving pins respectively, the driven plate
A ball head slidably disposed in the insertion hole of
By providing a tip projection in contact with the second annular swash plate on the ball head, the power transmission point of the rotation transmission means always crosses the axis of the input shaft and the rotation axis of the driven plate. It is on a plane that bisects the angle, and the rotation transmitting means is a constant velocity joint. Therefore, since the input shaft and the driven plate and the driven plate and the piston each transmit rotation at a constant speed, the input shaft and the piston also transmit rotation at a constant speed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

A swash plate type speed reducer according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view of the swash plate type speed reducer of the present embodiment. The reduction gear has an input shaft 4 and an output shaft 1
1, a driven plate 18 that swings and rotates with the input shaft, and an outer periphery
The driven plate 18 has an inclination angle α1 with respect to the axis B1 of the output shaft 11 at the outer annular portion 6b which is the first annular swash plate on the side of the driven plate 18.
(That is, the rotation axis A1 of the driven plate 18).
Has an inclination angle α1 with respect to the axis B1 of the input shaft 11.
The swash plate 6 and the driven plate 18 are rotated by the output shaft 1.
1 and a drive pin 26 for transmitting the signal to the drive pin 26.

One end of the input shaft 4 is supported via a bearing 3 on the center 2 of the first housing 1 made of a bowl-shaped metal body. A cylindrical swash plate 6 is formed integrally with the input shaft 4 and is located in the inner space 5 of the first housing 1. The back of the swash plate 6 has a thrust bearing 2 which receives an axial load.
The first housing 1 is disposed to face the inner surface of the first housing 1 via the first housing 8. A cylindrical second housing 8 is fixed to the open end of the first housing 1 with a screw 9 via a seal 7.

The output shaft 11 is rotatably supported on the inner peripheral portion of the second housing 8 via bearings 10 and 10a. The bearings 10 and 10a are juxtaposed in the axial direction, and the outer portion thereof is fixed to the inner peripheral portion of the first housing 9 by the spacer 12 and the holding ring 13 so as not to move freely in the axial direction. On the other hand, the inner portion is also held and fixed by a spacer (not shown) so as to prevent the inner portion from moving in the axial direction on the outer periphery of the output shaft 11. A shaft seal 14 was provided outside the holding ring 13.

On the concentric circle of the output shaft 11, drive pin insertion holes 24 extending in parallel with the central axis are provided at intervals of 120 degrees.
Drive pins 26 each having a ball head 26a at the other end via a compression spring 25 are arranged. Ball head portion 26a is being slidably located in the insertion hole 27 provided in the driven plate 18, the second ring-shaped and the projecting end portions 26b of the inner peripheral side of the swash plate 6
The swash plate is in contact with the inner annular portion 6a. In addition ,
The inner annular portion 6a of the plate 6 has an inclination angle α1 / 2 with respect to the axis B1 of the output shaft 11.

On the inner end surface of the second housing 8, an annular pin mounting plate 15 as a fixing plate is fixedly arranged with the same axis. FIG. 2 shows the structure of the pin mounting plate 15. As shown in the figure, the pin mounting plate 15 has n pin mounting holes 16 on a concentric circle, and a speed reduction pin 17 having a ball head 17a at an end is press-fitted into the pin mounting hole 16. Since the material of the deceleration pin 17 is desirably wear-resistant, normally hardened steel is used, and the ball head 17a is cut off to keep the length in the axial direction, leaving an effective range.

The driven plate 18 has a hemispherical projection 19 at the center thereof, and the projection 19 faces a receiving seat 21 held by a spring 20 inserted into an insertion hole provided at the center of the output shaft 11. Are located. On the other hand, the rear surface of the driven plate 18 is connected to the outer surface of the swash plate 6 via a sliding member 22 made of synthetic resin or the like.
It is arranged so as to be in contact with the annular portion 6b and always rotate at an inclination angle α1 with respect to the axis B1 of the output shaft 11. Driven plate 1
A pin guide hole 23 is formed at a position facing the deceleration pin 17 on the outer peripheral portion of the pin 8. The pin guide hole 23 is a cylindrical hole having a diameter substantially equal to the diameter of the ball head 17a of the deceleration pin 17, and is formed by chamfering the opening edge and (n + 1) more than the number n of the drive pins. . The structure of the driven plate 18 is shown in FIG. In this embodiment, the pin guide holes 23 are used.
Although the bottom of the base plate serves as a blind, the rigidity of the driven plate 18 is increased, but it may be penetrated depending on the use condition. Further, it is desirable that the drive pins 26 are arranged evenly on concentric circles. However, if there are three or more drive pins, even if the drive pins 26 are even, it is only necessary that they are arranged to face each other so as to balance the pair. The size of the ball head 26a and the tip protrusion 26b is determined according to the required strength, and the piston is hardened as necessary, and a surface processing treatment such as titanium coating or an appropriate material is selected.

The configuration of the present embodiment is as described above. Next, the operation will be described. As the input shaft 4 rotates, the swash plate 6 also rotates. With the rotation of the swash plate 6, the driven plate 18 starts conical movement within a certain range in the axial direction, and the deceleration pin 17
And the pin guide hole 23 are sequentially moved in the rotational direction about the hemispherical projection 19. That is, the driven plate 18 rotates while swinging. This rotational torque is transmitted to the drive pin 26 and alternately changes the compression spring 25 from the maximum compression to the minimum compression in accordance with the tilt position of the driven plate 18, and the rotational force is transmitted to decelerate the output shaft 11. Drive. At this time, the swash plate 6 rotates while engaging the deceleration pin 17 with the pin guide hole 23. However, as described above, the number of the pin guide holes 23 is n + 1 for the number n of the deceleration pins. There is one more. That is, since the output shaft only makes n rotations while the input shaft makes n + 1 rotations, a reduction gear having a reduction ratio of n: n + 1 is constituted.

Next, the constant velocity transmission of this embodiment will be described. All the embodiments in the present invention relate to a swash plate type drive mechanism for transmitting rotation at a constant speed, and the main part thereof is in a constant velocity joint mechanism. That is, the present invention is an application of the constant velocity joint disclosed in Japanese Patent Application No. 2-129088. Hereinafter, the principle of the constant velocity joint will be described with reference to FIGS.

FIG. 4 shows a constant velocity joint disclosed in Japanese Patent Application No. 2-129088. In FIG. 4, a drive shaft 100 and a driven shaft 101 are connected via a drive pin 102 having a ball head 103. The axes A and B of the driven shaft 100 and the driven shaft 101 intersect at an angle α at a point 0, and a straight line C connecting the centers of the ball heads 103 is located on a plane that divides the intersection angle α into two equal parts. The position of the drive pin 102 is restricted by springs 104 and 105.

FIG. 5 shows the geometric relationship between the axes A, B and C. In FIG. 5, a point P is the center of the ball head 103 and is a power transmission point. Here, assuming that the legs of the perpendiculars lowered from the point P to both axes are hA and hB, the straight line connecting the point P and the point O divides the intersection angle α into two equal parts, so that hA = hB. Drive shaft 100
The angular velocities of the axis A and the axis B of the driven shaft are respectively ω
Assuming that A and ωB, the peripheral velocities of the two axes AB around the point P are ωA · hA and ωB · hB, respectively. Here, the point P corresponds to the spring 10
Since the position is fixed at 4, 105 and is constant, these peripheral speeds are equal to ωA · hA = ωB · hB. Therefore ωA = ωB
If the power transmission point P is always located on a plane that bisects the intersection angle α of both axes, it can be understood that rotation is transmitted at a constant speed.

Next, the constant velocity in the swash plate type reduction gear according to the embodiment of the present invention to which the constant velocity joint is applied will be described with reference to FIGS. In FIG. 6, if the rotation axis of the driven plate 18 is the driving axis A1 and the center axis of the output shaft 11 is the driven axis B1, the intersection angle between the driving axis A1 and the driven axis B1 is α1. Also, since the inclination angle of the inner annular portion 6a of the swash plate 6 with which the projection 26b of the drive pin 26 is in contact with the driven axis B1 is α1 / 2, the two drive pins 26 shown connect the center 26a of the ball head. The plane C on which the straight line is located, that is, the plane C including the straight line connecting the two power transmission points
The inclination angle of 1 with respect to the driven axis B1 is also α1 / 2. That is, the power transmission point is always at the driving axis A1 and the driven axis B1.
Exists on a plane that divides the intersection angle α1 into two. Therefore, the rotation of the drive axis A1 is transmitted to the driven axis B1 at a constant speed, so that the transmission of the rotational force between the input shaft 4 and the output shaft 11 is performed at a constant speed. Further, since the inclination angle α1 / 2 is determined by the swash plate 6, the transmission can be performed at a constant speed without fail.

According to the present embodiment configured as described above,
Since rotation is transmitted at a constant speed, vibration and noise caused by undulations generated by non-constant speed transmission can be reduced. In addition, since a swash plate (inner annular portion 6a) having a certain inclination angle is provided without using a spring or the like, certainty of uniform velocity can be improved. Further, the structure is simple, and the assembling property is improved.

Next, a gas pressure swash plate type piston pump apparatus according to another embodiment of the present invention will be described with reference to FIGS.

FIG. 7 is a sectional view of a swash plate type piston pump device.

The piston pump device includes a drive shaft 30, a cylinder barrel 35 that rotates with the rotation of the drive shaft 30,
A piston 37 which reciprocates within the cylinder bore 35a which is made form the cylinder barrel 35, drive the rotating together with the piston 37 for converting rotational motion into linear motion of the piston 37
A piston support 38 as a moving plate and a cylinder barrel 3
Drive pin 3 for transmitting the rotation of 5 to the piston support 38
9 and the outer annular portion 41b which is the first annular swash plate on the outer peripheral side.
So that the piston support 38 rotates at an inclination angle α2 with respect to the axis A2 of the drive shaft 30 (that is,
The rotation axis B2 of the support 38 is the axis A2 of the drive shaft 30.
The piston support 38 rotates with an inclination angle α2
And a fixed swash plate 41 which supports the piston support 38 (to roll over) .

The drive shaft 30 has one end supported by a housing 33 via a bearing 34. The other end of the drive shaft 30 is supported on a side cover 31 via a bearing 32, and a cylinder barrel 35 is disposed and fixed via a valve plate 36.

A plurality of pistons 37 are inserted into the cylinder bore 35a, and a ball head 37a is connected to and held by a piston support 38 supported at the center of the drive shaft 30.

The fixed swash plate 41 is a cylindrical body located on the back of the piston support 38, and the outer annular portion 41b is formed as described above.
At an inclination angle α2 with respect to the axis A2 of the drive shaft 30
So that the piston support 38 is supported
The inner annular portion 41a, which is a plate, is opposed to the axis A2 of the drive shaft 30.
And has an inclination angle of α2 / 2. The fixed swash plate 41 is positioned by using a positioning pin 42 and then fixed by a pin (not shown) or the like.

The drive pin 39 is arranged concentrically inside the piston 37. One end of the drive pin 39 is inserted into a drive pin insertion hole 35b provided in the cylinder barrel 35 via a compression spring 40, and the ball head 39a at the other end is rotated to a ball receiving hole 38b formed on the end surface of the piston support 38. It is freely inserted and arranged. In addition, the tip of the ball 39a
A portion 39b is provided.
Fixed swash plate 4 having an inclination angle of α2 / 2 with respect to axis A2 of 0
The first inner annular portion 41a is in contact with the first inner annular portion 41a.

The piston pump device has the above configuration,
FIG. 8 shows an XY cross-sectional view thereof. As shown, a drive pin 39 is arranged concentrically around the drive shaft 30 and a piston 37 is arranged concentrically outside.

In the piston pump device, when the drive shaft 30 rotates, the cylinder barrel 35 rotates, and a rotational force is transmitted through a drive pin 39 to rotate the piston support 38. Accordingly, the rotation causes the piston 37 to reciprocate and generate a discharge pressure.

The constant velocity of the swash plate type piston device will be described with reference to FIGS. In FIG. 9, the center axis of the drive shaft 30 is the drive axis A2, and the rotation axis of the piston support 38.
If the line is the driven axis B2, the intersection angle between the driving axis A2 and the driven axis B2 is α2. Further, since the inclination angle of the inner annular portion 41a of the fixed swash plate 41 with which the projection 39b of the drive pin 39 is in contact with the drive axis A2 is α2 / 2, the two drive pins 39 shown connect the center 39a of the ball head. The inclination angle of the plane C2 including the straight line with respect to the drive axis A2 is also α2 / 2.
Becomes That is, as in the case of the above embodiment, the power transmission point is always the intersection angle α2 between the drive axis A2 and the driven axis B2.
And satisfies the condition of constant velocity.
Therefore, the rotation of the drive axis A2 is transmitted to the driven axis B2 at a constant speed, and the transmission of the rotational force between the drive shaft 30 and the piston 37 is performed at a constant speed. Further, since the inclination angle α2 / 2 is fixed by the fixed swash plate 41, the transmission can be performed at a constant speed without fail. That is, synchronous rotation can be performed without giving any external force to the piston portion that affects the performance. Fixed swash plate 4
1 is the case where the inner annular portion 41a and the outer annular portion 41b are the aforementioned α2
As long as the relationship between α and α2 / 2 is satisfied, several types of objects having different inclination angles may be prepared and arbitrarily selected according to the discharge capacity.

According to the present embodiment configured as described above,
Since rotation is transmitted at a constant speed, vibration and noise caused by undulations generated by non-constant speed transmission can be reduced. In addition, since a swash plate having a certain inclination angle is provided without using a spring or the like, certainty of uniform velocity can be improved.

[0039]

According to the present invention, since rotation is transmitted at a constant speed,
Vibration and noise due to undulation generated by non-constant speed transmission can be reduced. In addition, since a swash plate having a certain inclination angle is provided, it is possible to improve the reliability of uniform velocity. Further, the structure is simple, and the assembling property is improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a swash plate type speed reducer according to an embodiment of the present invention.

FIG. 2 is a diagram showing a structure of a pin mounting plate.

FIG. 3 is a diagram showing a structure of a driven plate.

FIG. 4 is a view showing a constant velocity joint described in Japanese Patent Application No. 2-129088.

FIG. 5 is a diagram showing a geometric relationship of a constant velocity joint.

FIG. 6 is a diagram showing a geometric relationship of a joint mechanism in the swash plate type speed reducer.

FIG. 7 is a sectional view of a gas pressure swash plate type piston pump device according to an embodiment of the present invention.

FIG. 8 is an XY cross-sectional view of the piston pump device.

FIG. 9 is a diagram showing a geometric relationship of a joint mechanism in the swash plate type piston pump device.

[Explanation of symbols]

 Reference Signs List 4 Input shaft 6 Swash plate 6a Inner annular portion 6b Outer annular portion 11 Output shaft 18 Driven plate 26 Drive pin 26a Ball head 26b Tip protrusion 30 Drive shaft 35 Cylinder barrel 37 Piston 38 Piston support 39 Drive pin 39a Ball head 39b Tip protrusion 41 Fixed swash plate 41a Inner annular part 41b Outer annular part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-93487 (JP, A) JP-A-60-136642 (JP, A) JP-A-63-13921 (JP, A) 309785 (JP, A) JP-A-62-162777 (JP, A) JP-A-63-308220 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16H 1/32 F04B 27 / 08

Claims (2)

(57) [Claims] An input shaft and an output shaft arranged on the same axis, a rotary swash plate that rotates integrally with the input shaft, and supported by the rotary swash plate, and the output shaft is rotated by rotation of the rotary swash plate. A driven plate that swings and rotates with a fixed inclination angle with respect to
A swash plate type reduction gear having a rotation transmitting means for rotating with the rotation of the driven plate and transmitting the rotation of the driven plate to the output shaft, wherein the rotation swash plate has an outer peripheral first annular swash plate and an inner periphery. And a second annular swash plate on the driven side, the first annular swash plate supporting the driven plate so that the driven plate swings and rotates with the constant inclination angle by rotation of the rotary swash plate. , The second annular swash plate is about の of the fixed inclination angle with respect to the output shaft.
Wherein the rotation transmitting means has a plurality of drive pins that connect the driven plate and the output shaft in a rotational direction, and the plurality of drive pins are respectively provided with the output pins. In the insertion hole provided in the shaft
A compression spring is provided at one end of the insertion hole.
And a ball head at the other end of the plurality of drive pins.
A ball head is slidably disposed in an insertion hole provided in the driven plate to rotate the driven plate via the driving pin.
None to transmit to the output shaft, and a swash plate type reduction gear, characterized in that a projecting end portions contacting against the second annular swash plate by being pressed by the compression spring to the ball head portion . 2. An input shaft supported at both ends, a cylinder barrel rotating integrally with the input shaft, a piston reciprocating in a cylinder bore formed with the cylinder barrel, and the cylinder barrel connected to the piston. A driven plate that converts the rotation of the piston into a linear motion of the piston, a fixed swash plate that supports the driven plate at a fixed inclination angle with respect to the input shaft, and a rotation of the cylinder barrel that rotates with the rotation of the cylinder barrel. In a swash plate type axial piston pump device provided with rotation transmitting means for transmitting rotation to the driven plate, the fixed swash plate has a first annular swash plate on an outer peripheral side and a second annular swash plate on an inner peripheral side. The first annular swash plate supports the driven plate so that the driven plate swings and rotates with the fixed inclination angle by the rotation of the cylinder barrel.
The annular swash plate has an inclination angle of about の of the constant inclination angle with respect to the input shaft, and the rotation transmitting means moves the cylinder barrel and the driven plate in a rotational direction. It has a plurality of driving pins to be connected, and the plurality of driving pins are respectively provided on the cylinder barrel.
Inserted into the insertion hole and inserted into the insertion hole
A compression spring is provided, and a ball is provided at the other end of the plurality of drive pins.
A head is provided, and the spherical head is slidably disposed in an insertion hole provided in the driven plate , whereby the cylinder barrel has a head.
The rotation is transmitted to the driven plate via the driving pin.
Sea urchin, and be pressed by the compression spring
Swash plate type axial piston pump apparatus characterized in that a projecting end portions contacting against the second annular swash plate by the.