JP2601266Y2 - Oil damper device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil damper device for reducing an impact force.

[0002]

2. Description of the Related Art Conventionally, various devices have been provided with an oil damper device or the like that performs a shock-absorbing action (damper action) in order to absorb and reduce impact applied to components and the like. For example, a transmission operating device that uses fluid pressure (particularly air pressure) requires a large shift operating force when the gear is turned on. The transmission and the operating device may be damaged by the impact force. Therefore, an oil damper device is provided in a conventional transmission operating device or the like, and the above-described disadvantage is solved by a damper function of the oil damper device.

[0003]

However, the conventional oil damper device described above is susceptible to the concentricity because it is provided inside the shift rod or directly attached to the shift rod. . If the concentricity varies, the shift rod may hit the cylinder housing halfway, or the damper piston may interfere with the damper cylinder, causing high pressure oil from the damper cylinder or the like due to damage to the shift rod or wear of the damper cylinder and the damper piston. May appear. As a result, there has been a problem that the damper function of the oil damper device is not effectively performed and an impact force is generated, or the oil damper device hinders, for example, normal operation of a transmission operating device.

Further, the conventional oil damper device is structured so as to operate even near a neutral position which does not originally require a damper action. For example, a gear of a transmission is shifted from a neutral position to a shift position, or When switching from the shift position to the neutral position, there is a disadvantage that the movement of the damper piston is not performed quickly and smoothly.

The present invention has been made in view of such circumstances, and an object thereof is to provide an oil damper device which eliminates a damper function near a neutral position, and which can quickly return to a neutral position after operation. Is to do.

[0006]

In order to solve the problems of the prior art, according to the present invention, a damper housing forming an oil chamber into which oil is filled, and a damper housing provided in the damper housing, are provided. Inside the damper housing
An oil passage communicating with the oil chamber is formed between the oil passage and the peripheral surface.
A damper cylinder which, the transmission in the damper cylinder
A damper piston slidably disposed in conjunction with a shift operation member of the operation device , and a damper chamber is formed on each of the left and right sides in the damper cylinder by the damper piston ; From the oil chamber to the damper piston
Check valve allowing oil to flow to the left and right damper chambers
Provided with a transmission operation of an orifice communicating the damper chamber and said oil passage in the peripheral wall portion of the damper cylinder positioned in the damper chamber of the left and right respectively provided
In the oil damper device, the orifices are respectively located near both ends in the axial direction of the damper cylinder.
The orifice is provided on the peripheral wall of the damper cylinder.
The oil passage closer to the damper piston than the oil passage.
The oil passage area is communicated with the left and right damper chambers and the oil passage area is
The orifice is set larger than the oil passage area of the orifice.
Each through-hole without fiss action is provided, and the damper piston moves from the neutral position until the damper piston closes the through-hole.
Damping action is performed only when the feed path act is not performed the oil in the damper chamber to the oil passage through the hole, wherein the damper piston is moved toward the more the orifice from closing the said hole It is configured as follows.

[0007]

[Action] In the oil damper device of the present invention is, da until the damper piston starts damping action slides from the neutral position
Make the oil in the damper chamber smaller than the oil passage area of the orifice.
Since the oil passage area is large and can be sent out to the oil passage side through a through hole without damper action, the damper action is not performed near the neutral position where the application of damper force is not required. It is possible to quickly return the damper piston to the neutral position.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments.

FIGS. 1 to 4 show an embodiment of an oil damper device according to the present invention. In FIG. 1, reference numeral 1 denotes a transmission operating device provided with an oil damper device 2 according to an embodiment of the present invention. is there.

The operating device 1 has a shift operation cylinder housing 3 mounted on the upper surface of a housing of a transmission (not shown). A shift rod 4 as a shift operation member is provided in the cylinder housing 3. It is supported rotatably about the axis. A gear shift lever (not shown) is movably attached to an intermediate portion of the shift rod 4. The gear shift lever is moved along the axial direction of the shift rod 4 by a select operation, and the shift operation is performed at a desired select position. It is configured to be able to perform.

One end 3 of the opening of the cylinder housing 3
a, a casing 5 having a substantially U-shaped cross section for accommodating one end of the shift rod 4, a connecting lever and a retainer described later, and the like.
Are mounted coaxially with the cylinder housing 3.
The casing 5 includes a flange portion 5a and four bolts 6
It is fixed so that it can be removed by tightening.
A connecting lever 7 for connecting the shift rod 4 and the oil damper device 2 is provided in the casing 5, and the damper force of the oil damper device 2 is applied to the shift rod 4 via the connecting lever 7. It is configured to:

For this reason, the connecting lever 7 is connected to the shift rod 4
The base end portion 7a is formed in a tubular shape so as to be spline-coupled to the one end portion 4a of the shift rod 4 on which the spline is formed. The tip portion 7b can rotate together with the shift rod 4 in the same direction (a direction orthogonal to the axial direction of the shift rod 4) in a state of being spline-coupled to the one end portion 4a. Then, the connecting lever 7
The tip 7b is disposed so as to protrude toward the oil damper device 2 from an opening 8 formed on the lower surface of the casing 5.

In the casing 5, a first retainer 9 and a second retainer 10 are provided at the base end 7 a of the connecting lever 7.
It is arranged on both sides on the left and right. The first retainer 9 is disposed on the opening 5 b side of the casing 5 so as to rotatably support the one end 4 a of the shift rod 4 protruding from the cylinder housing 3. It is formed by a small diameter portion 9a to be fitted and a large diameter portion 9b fixed to the inner peripheral surface of the casing 5.

The small diameter portion 9a of the first retainer 9 is provided with a seal member 11 for an oil damper.
The oil damper seal member 11 prevents the damper oil from leaking when the cylinder housing 3 and the casing 5 are assembled. A seal member 12 is fitted on the outer peripheral surface of the large-diameter portion 9b, and an O-ring is used as the seal member 12, for example. Further, a proximal end portion 7a of the connecting lever 7 is provided on an end surface of the large diameter portion 9b.
A stepped locking portion 13 corresponding to the side surface is formed,
The base end 7a of the connecting lever 7 engages with the locking portion 13. At one end 3a of the opening of the cylinder housing 3, a gear oil seal member 14 is provided so as to face the oil damper seal member 11. The gear oil seal member 14 allows the cylinder housing 3 and the casing 5 to be assembled. Intrusion of the gear oil into the casing 5 during attachment is prevented.

On the other hand, the second retainer 10 is
Are provided on the side opposite to the opening 5b of the
It is formed by a small diameter portion 10a arranged on the side and a large diameter portion 10b fixed to the inner peripheral surface of the casing 5.
On the end face of the small-diameter portion 10a, a step-like locking portion 15 corresponding to the side surface of the base end portion 7a of the connecting lever 7 is formed, and the base end portion 7a of the connecting lever 7 is engaged with this locking portion 15. It is supposed to. Therefore, in a state before the casing 5 is assembled to the cylinder housing 3, the base end portion 7a
Locking portions 1 of the first and second retainers 9 and 10
The engagement of the connecting levers 3 and 15 prevents the connecting lever 7 from falling.

An oil damper device 2 is provided below the casing 5 separately from the shift rod 4 in relation to the connecting lever 7. This oil damper device 2
Has a cylindrical damper housing 16 in which oil as a pressure fluid is filled.
6 is attached to the lower surface of the casing 5. Thus, an insertion port 17 is formed on the upper surface of the damper housing 16 in correspondence with the opening 8 of the casing 5, and
A seal member 18 is provided between the damper housing 16 and the casing 5.

A pair of left and right lids 19 and 20 for closing the openings at both ends are provided inside the damper housing 16, and a cylindrical damper cylinder 21 is disposed between the lids 19 and 20. I have. This damper cylinder 21
It is formed smaller than the inner diameter of the damper housing 16, and is arranged to form an oil passage 22 between the outer surface of the damper cylinder 21 and the inner surface of the damper housing 16. Thus, inside the damper housing 16, there are two upper and lower parts defined by the damper cylinder 21.
One chamber is provided, and the upper chamber is an oil chamber 23 for filling oil. In the lower chamber, a damper piston 24 is slidably provided in conjunction with the connection lever 7 serving as a damper force imparting member, and the two damper chambers 25 and 26 are disposed by the damper piston 24 on both the left and right sides of the damper cylinder 21. Is formed.

In the peripheral wall of the damper cylinder 21 located in the damper chambers 25 and 26, orifices 27 and 28 and through holes 29 and 30 communicating with the oil passage 22 are formed, respectively. Reference numerals 25 and 26 communicate with the oil chamber 23 through orifices 27 and 28, through holes 29 and 30, and the oil passage 22. As shown in FIGS. 2 and 3, one orifice 27, 28 is provided on each of the right and left peripheral walls of the damper cylinder 21. On the other hand, the through holes 29 and 30 on the left and right sides are symmetrical in the axial direction with respect to the neutral position of the connecting lever 7 where the oil damper device 2 is not operated, and are near the end of the damper piston 24 in the neutral state. Damper cylinder 2 located at
1 is provided on the peripheral wall portion . Moreover, the through holes 29, 30
Is provided at a position where both of the connecting levers 7 are opened near the neutral position, whereby the oil in the damper chambers 25 and 26 is maintained until the damper piston 24 slides from the neutral position to start the damper action. It is configured such that it can be sent to the oil passage 22 side through the through holes 29 and 30. The left and right through holes 29 and 30 are provided at positions such that one of the through holes 29 and 30 is closed by the damper piston 24 and the other is opened when the oil damper device 2 is in the operating state.

That is, the left and right through holes 29, 30 are provided.
In order to prevent a damper action from being performed near the neutral position of the oil damper device 2 and until the oil damper device 2 is in the neutral position after the oil damper device 2 has been operated, the damper is also provided at a location other than the orifices 27 and 28 when the damper action is not required. Room 25,
26, the oil passage 22 and the oil chamber 23 are communicated with each other, and the damper action is performed only when the damper piston 24 moves toward one of the corresponding orifices 27 and 28 after being closed. Have been.
Therefore, the through hole 2 is formed in the peripheral wall of the damper cylinder 21.
9,30 has opened a plurality of locations of the peripheral wall portion by an interval in the circumferential direction at approximately the same position each axial damper cylinder. The through holes 29 and 30 are corresponding to the orifice 2
7 and 28, the connecting lever 7 and the
And in a position close to the damper piston 24, a plurality of locations
Orifices 27, 2 corresponding to the total oil passage area of
8 orifice is set larger than the oil passage area
Has no effect. These through holes 29 and 30 are provided in the orifice 2
If the diameter is the same as that of the orifices 27 and 28,
If the diameter is larger than 8, it may be one. In addition, a substantially central peripheral wall portion of the damper cylinder 21 in the axial direction includes:
The through hole 3 corresponding to the insertion port 17 of the damper housing 16
The damper cylinder 21 is prevented from rotating by engaging the engaging member 32 with the through hole 31. Although the through holes 29 and 30 may be circular, as shown in FIGS. 5A and 5B, the through holes 29 and 30 are formed in a planar triangular shape that tapers to the left and right ends of the damper cylinder 21 and are formed near the neutral side. The area may be large and the area on both the left and right sides may be small. With such triangular through holes 29, 30, the damper gradually works as the damper piston 24 moves from the neutral position to the left and right sides.

On the other hand, a vertical hole 33 is formed substantially at the center of the damper piston 24 in the axial direction, and the distal end 7b of the connecting lever 7 is inserted into the vertical hole 33 to thereby form the damper piston 24. And the connection lever 7 are connected to each other. Also, the damper piston 24
Are formed with communication passages 36 and 37 in which ball-shaped check valves 34 and 35 are disposed.
The oil chamber 23 and the damper chambers 25, 26 communicate with each other via the 37 and the check valves 34, 35 when the check valves 34, 35 are opened. The check valves 34 and 35 are provided with the biasing spring 3
The oil in the oil chamber 23 flows through the damper piston 24 to the damper chambers 25 and 26 while being constantly urged toward the valve seats 34a and 35a by the dampers 8 and 39.
The oils 5 and 26 do not flow into the oil chamber 23 through the damper piston 24.

In the oil damper device 2, when a gear of a transmission (not shown) is engaged (when the gear is moved from the neutral position to the shift position), the connecting lever 7 is shown together with the shift rod 4 by, for example, a chain line in FIG. When the damper piston 24 rotates clockwise as described above, the damper piston 24 slides leftward from the neutral position with the left check valve 34 closed, so that the oil in the damper chamber 25 is discharged to the orifice 27 and the oil passage 22.
Through the oil chamber 23 to perform a damper action. Thus, after the shift rod 4 has rotated a predetermined amount from the neutral position, the damper force from the damper device 2 is applied to the shift rod 4 via the connecting lever 7. This damper force acts as a reaction force of the shift operation force and acts in the direction opposite to the shift direction of the gear shift lever (not shown), and cancels the shift operation force immediately after synchronization is completed, so that gear collision at the time of gear engagement is eliminated. In addition, a smooth shift operation can be performed.
In addition, the left through-hole 29 is open until the damper device 2 starts damping, and the oil in the left damper chamber 25 is supplied to the oil passage 22 and the oil chamber 23 through the through-hole 29 by the damper piston 24. The gears can be smoothly turned on.

When the transmission is disengaged (when the transmission is shifted from the shift position to the neutral position), the damper piston 24 slides rightward, so that the shift rod 4 is moved counterclockwise via the connecting lever 7. To return to the neutral position. At this time, the oil chamber 23
Is pushed through the communication passage 36 to push the check valve 34, so that the check valve 34 separates from the valve seat 34 a against the urging force of the urging spring 38. Since the oil chamber 23 and the damper chamber 25 communicate with each other via the communication path 36 of the damper piston 24, the damper piston 24 moves to the right smoothly. The right through-hole 30 is open until the damper piston 24 returns to the neutral position, and the right damper chamber 26 communicates with the oil chamber 23 through the through-hole 30 and the oil passage 22. No damping action is performed until the device 2 is in the neutral state. That is, the damper device 2 is configured to operate only when a gear of a transmission that originally requires a damper action is engaged. When the connecting lever 7 rotates counterclockwise in FIG. 2, the damper piston 24 slides rightward to perform the same operation.

In the oil damper device 2 of the present embodiment, the gears of the transmission which inherently require a damper function due to the existence of the left and right through holes 29, 30 opened and closed by one damper piston 24. It operates only when the gear is in the neutral state and does not perform the damper action until it is in the neutral state or after the operation is in the neutral state. Therefore, the structure is simple and does not increase the cost. And can be done quickly. Moreover, the oil damper device 2 of the present embodiment is provided separately and independently from the shift rod 4 and is connected to the shift rod 4 via the connecting lever 7, so that the shift rod 4 and the oil damper device 2 are concentric. Oil damper device 2
Is effectively performed, and even if the oil damper device 2 is provided, the normal operation of the transmission operating device 1 is not hindered.

As described above, one embodiment of the present invention has been described.
The present invention is not limited to the embodiments described above, and various modifications and changes can be made based on the technical idea of the present invention.

For example, in the above-described embodiment, the oil damper device 2 is provided in the transmission operating device 1. However, if it is necessary to absorb and reduce the impact applied to the components and the like by the damper action, the transmission operating device is required. It can be provided in a device other than one.

[0026]

As described above, the oil damper device according to the present invention has an orifice near both ends in the axial direction of the damper cylinder.
The damper cylinder.
Oil is passed to the side closer to the damper piston than the orifice.
The passage and the left and right damper chambers communicate and the oil passage area is
The orifice is set larger than the oil passage area of the
Holes are provided, and the damper piston is
The damper chamber slides from the upright position until the damper action starts.
The oil is sent to the oil passage side through the hole , the damper action is not performed near the neutral position where it is not necessary to apply damper force, and the damper piston closes the hole and moves toward the orifice. The damper function is performed only when the operation is being performed, and can be quickly returned to the neutral position after the operation. Then , the oil damper device of the present invention is provided in the transmission operating device so that the damper operation is performed only when it is originally required , and the damper piston is provided.
Closes the hole and moves towards the orifice
Then, the damper action is suddenly generated, so that the shift operation of the transmission can be performed smoothly and quickly.

Further, in the oil damper device of the present invention, since the through hole is merely provided at a predetermined position of the damper cylinder in relation to the damper piston, the structure is simple and the cost of parts is not increased. It is economically advantageous.

[Brief description of the drawings]

FIG. 1 is a sectional front view showing a state where an oil damper device according to an embodiment of the present invention is assembled to a transmission operating device.

FIG. 2 is a side view showing a cross section of the oil damper device.

FIG. 3 is a perspective view showing a damper cylinder of the oil damper device.

FIG. 4 is a perspective view showing a damper piston of the oil damper device.

FIGS. 5A and 5B are plan views showing triangular through holes.

[Explanation of symbols]

 2 Oil Damper Device 7 Connecting Lever 16 Damper Housing 17 Insertion Port 19, 20 Lid 21 Damper Cylinder 22 Oil Passage 23 Oil Chamber 24 Damper Piston 25, 26 Damper Chamber 27, 28 Orifice 29, 30 Through Hole 31 Through Hole 33 Vertical Hole

Continuation of the front page (56) References JP-A-63-172049 (JP, A) JP-A-4-347055 (JP, A) JP-A-1-115030 (JP, U) JP-A-3-107561 (JP) , U) Japanese Utility Model 4/49262 (JP, U) Japanese Utility Model 2/62131 (JP, U) Japanese Utility Model 60-86637 (JP, U) Japanese Utility Model 48-38291 (JP, U) Japanese Utility Model 55-105638 (JP, U) Jikken 61-15324 (JP, Y2) JP 27-1160 (JP, B1) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16F 9/00 -9/58 F16H 61/26

Claims (2)

(57) [Scope of request for utility model registration] An oil chamber filled with oil is formed.
A damper housing formed is provided inside the damper housing, wherein the OH between the inner peripheral surface of the damper housing
A damper cylinder forming an oil passage communicating with the oil chamber, and a shift operation of a transmission operating device in the damper cylinder.
And a damper piston slidably disposed in conjunction with the working member, and a damper chamber is formed on each of the left and right sides in the damper cylinder by the damper piston.
Left and right damper chambers from the oil chamber to the damper piston
A check valve that allows oil to flow to
In the oil damper device for a transmission operating device respectively the orifice communicating the oil passage and the damper chamber peripheral wall portion of the damper cylinder positioned in the damper chamber of the left and right axial ends nearest the damper cylinder
Position each of the orifices, and
The damper pin is provided on the peripheral wall of the cylinder rather than the orifice.
The oil passage and the left and right damper chambers on the side near the ston
And the oil passage area is
Traffic that is set larger than the road area and has no orifice action
Holes are provided, and the damper piston is moved from the neutral position.
Go and feed the oil of the through hole to close the inside front <br/> Symbol damper chamber without performing damper acts on the oil passage through the hole, the damper piston from blocking the hole Moreover oil damper device for a transmission operating device, characterized in that constructed as damping action is performed only when moving toward the orifice. 2. The damper cylinder according to claim 2, wherein the through-hole is an axis of the damper cylinder.
At the same position in the direction and at intervals in the circumferential direction
Transmission operation according to claim 1, characterized in that it is provided.
Oil damper device for the device .