JPH0426701Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a bearing regulating device for a swash plate pump or motor using a semi-cylindrical swash plate.

(Conventional Support Device) The conventional bearing regulating device shown in FIG. It restrains it from moving freely. This swash plate 4 is formed into a semi-cylindrical shape, and
The arc-shaped rolling surface 5 on the back side corresponds to the concave arc surface 7 of the body 6.

A bearing mechanism a is interposed between the rolling surface 5 of the swash plate 4 and the concave arc surface 7 of the body 6, and the bearing mechanism a is always correctly positioned in the rolling direction. A regulatory mechanism has been established to ensure that

That is, the bearing mechanism a is composed of a large number of rolling elements 8 that roll between the rolling surface 5 of the swash plate 4 and the concave arc surface 7 of the body 6, and a cage 9 that holds these rolling elements 8. At the same time, a lever 10 forming a regulating mechanism is associated with the cage 9 so that the bearing mechanism a does not gradually deviate from its normal position as the swash plate 4 rolls.

In other words, the lever 10 has one end bent at a right angle, and that part is rotatably fitted into a hole on the body 6 side, and the other end is bent at a right angle to the bearing mechanism a.
It slidably passes through the cage 9, and also passes through the rotation pin 11 provided on the swash plate 4 so that it can be inserted and removed. The lever 10 constructed in this way
is rotatable within the range of a triangular recess 12 formed in the body 6 and a recess 13 formed in the swash plate 4.

Therefore, even if the swash plate 4 rolls and the cage 9 moves, the movement of the cage 9 is limited to the range in which the lever 10 can swing. It will never move out of position and will always remain in the correct position.

(Problems to be Solved by the Present Invention) In the conventional device as described above, the lever 10 must be passed through the rotation pin 11, which makes the assembly work difficult. Moreover, in order to rotate this lever 10 smoothly, it is necessary to provide some allowance in the horizontal hole of the rotation pin 11 through which the lever is passed. However, providing such a margin may cause the lever 10 to wobble, and especially when the tilting angle of the swash plate 4 is small, the wobble may prevent accurate guidance of the bearing mechanism a. There was a problem that I couldn't solve.

Furthermore, since it is difficult from a mechanical standpoint to make the lever 10 thicker, there is also the problem that it is difficult to maintain its rigidity.

The purpose of this invention is to provide a device that is easy to assemble, maintains rigidity, and has fewer sliding parts, eliminating the above-mentioned drawbacks of the conventional devices.

(Means for solving the problem) This invention includes a swash plate with an arc-shaped back surface as a rolling surface, and a body with a concave arc surface corresponding to this rolling surface. The invention is based on a swash plate pump or motor that is provided with a bearing mechanism in which a cage supports a large number of rolling elements between the concave arc surface and the concave arc surface.

Based on the above-mentioned pump or motor, this invention fixes a guide gear to the swash plate, rotatably provides a sector gear that engages with the guide gear on the body, and a guide piece protrudes from the sector gear, It is characterized in that the piece is engaged with a notch provided in the cage to restrict displacement of the bearing mechanism.

(Operation of the present invention) When the swash plate rolls, the sector gear rotates along the guide gear, so the guide piece provided on the sector gear functions and the bearing mechanism moves from the normal position to the incorrect position. to prevent it from slipping.

(Effects of the present invention) In this invention, the sector gear and the guide gear are engaged with each other, so a lever unlike the conventional one is not required. Since there is no need for a lever, there is no need to pass the lever through the rotating pin.
That's how easy it is to assemble.

Further, since the guide piece is made to protrude from the sector gear and this guide piece is engaged with the bearing mechanism, it becomes easy to maintain the rigidity of the sector gear.

Furthermore, with this configuration, since there are fewer sliding parts, malfunctions due to dimensional errors in each component are less likely to occur.

(Embodiment of the present invention) FIG. 1, which is an embodiment of the present invention, shows only the main parts of the swash plate 4, the bearing mechanism a, and the body 6, but the rest of the structure is the same as the conventional one. The same is true.

That is, the bearing mechanism a is connected to the cage 9.
The rolling element 8 is supported by the cage 9 and is interposed between the rolling surface 5 of the swash plate 4 and the concave arc surface 7 of the body 6.

Further, a guide gear 14 is provided on the swash plate 4 side, and a sector gear 15 is rotatably provided on the body 6 side, and these gears 14 and 15 are engaged with each other. A guide piece 16 is made to protrude from the side surface of the sector gear 15, and this guide piece 1
6 is engaged with a notch 17 formed in the cage 9.

Therefore, if the swash plate 4 rolls, the guide gear 1
4 also rotates, and along with this, sector gear 15
It rotates around a pin provided on the body side. When the sector gear rotates in this way, the guide piece 16 provided thereon regulates the notch 17 of the cage 9, and the bearing mechanism a consisting of the rolling elements 8 rotates.
Prevents the device from shifting from its normal position to an incorrect position.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of essential parts showing an embodiment of the bearing regulating device of this invention, and FIG. 2 is a cutaway sectional view of a swash plate pump or motor equipped with a conventionally known bearing regulating device. 4... Swash plate, 5... Rolling surface, 6... Body, 7
... Concave arc surface, 9 ... Cage, 14 ... Guide gear, 15 ... Sector gear, 16 ... Guide piece, a ...
...Bearing mechanism.

Claims (1)

[Scope of utility model registration request] Equipped with a swash plate with an arcuate back surface as a rolling surface, and a body with a concave arc surface corresponding to the rolling surface,
In a swash plate pump or motor that has a bearing mechanism in which a cage supports a large number of rolling elements between the rolling surface and the concave arc surface, a guide gear is fixed to the swash plate, and the body is equipped with a guide gear. A sector gear that engages with the cage is rotatably provided, a guide piece is protruded from the sector gear, and the guide piece is engaged with a notch provided in the cage to restrict displacement of the bearing mechanism. Bearing regulation device for plate pumps or motors.