KR950007240Y1 - Oil damper - Google Patents

Abstract

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Description

Oil damper device

1 is a front view showing the state in which the oil damper device according to one embodiment of the present invention is assembled with a transmission control device in cross section.

2 is a side view of the oil damper device described above in cross section.

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

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

5a and b are plan views showing openings having a triangular shape.

* Explanation of symbols for main parts of the drawings

2: oil damper device 7: connecting lever (damper force supply member)

16: damper housing 17: insertion hole

19, 20: object 21: damper cylinder

22: oil passage 23: oil seal

24: damper piston 25, 26: damper chamber

27, 28: orifice 29, 30: through hole

31: through hole 33: vertical hole

The present invention relates to an oil damper device for mitigating impact force.

DESCRIPTION OF RELATED ART Conventionally, various apparatuses are provided with the oil damper apparatus etc. which perform a buffer effect (damper effect) in order to absorb and dampen the shock applied to components.

For example, the transmission operation device using fluid pressure (especially air pressure) requires a large shift operation force at the time of gear input. Therefore, if the shift operation is performed with this large shift operation force even after synchronism is completed, the gear collision will occur. This may cause damage to the transmission or the operating device due to the impact force.

Therefore, an oil damper device is provided in a conventional transmission operating device and the like, and the above-mentioned inconvenience is eliminated by the damper action of the oil damper device.

By the way, since the conventional oil damper apparatus mentioned above is provided in the inside of a shift rod, or is attached directly to a shift rod, it is easy to be influenced by concentricity.

If there is an error in the concentricity, the shift rod contacts only one side of the cylinder housing or the damper piston interferes with the damper cylinder, and the high pressure oil leaks from the damper cylinder due to the damage of the shift rod or the wear of the damper cylinder and damper piston. The phenomenon appears.

As a result, the above-mentioned damper action of the oil damper device is not effectively performed, and an impact force is generated, or the oil damper device is causing a bad state in which normal operation of the transmission operating device is interrupted, for example.

In addition, since the conventional oil damper device is designed to operate near a neutral position that does not inherently require a damper action, for example, the gear of the transmission is shifted from a neutral position to a shift position or neutral from a shift position. There is a drawback that the damper piston does not move quickly and smoothly when changing to a position.

The present invention has been made in view of such a situation, and an object thereof is to provide an oil damper device capable of eliminating the damper action near the neutral position and further returning to the neutral position quickly after the operation.

MEANS TO SOLVE THE PROBLEM In order to solve the subject which the said prior art possesses, in this invention, the damper housing which oil is filled inside, and the damper which is provided in this damper housing, and is arrange | positioned so that an oil path may be formed between the damper housing. The damper cylinder is provided with a cylinder and a damper piston which slides freely in association with the damper force applying member in the damper cylinder, and the damper chamber is formed on the left and right sides of the damper cylinder, and the damper chamber is located in these damper chambers. Oil ducts are installed in the wall of the damper cylinder to communicate with the above-mentioned oil passages and through holes, and the oil in the damper chamber passes through the above-mentioned holes until the damper piston slides in the neutral position to start the damper action. It is configured to send to the side.

In the oil damper device of the present invention, since the damper stone slides from the neutral position to start the damper action, the oil in the damper chamber is configured to be discharged to the oil passage through the through hole, so that the damper force does not need to be imparted. The damper action is not performed in the vicinity, and after operation, the damper piston can be quickly returned to the neutral position.

Hereinafter, the present invention will be described in detail with reference to the embodiment shown.

1 to 4 show an embodiment of the oil damper device according to the present invention, the reference numeral 1 in the drawings is a transmission operating device provided with an oil damper device 2 according to an embodiment of the present invention. .

This operating device 1 has a cylinder housing 3 of a shifting action attached to an upper surface of a transmission housing (not shown). In the cylinder housing 3, the shift rod 4 is centered on the shaft center thereof. It is rotatably supported.

A gear shift lever (not shown) is movably attached to the intermediate portion of the shift rod 4, and the gear shift lever is moved in the axial direction of the shift rod 4 by a selection operation, and the desired selection is made. The shift operation is performed at the position.

In the opening one end 3a of the cylinder housing 3, one end of the shift rod 4, a connecting lever, a retainer, and the like, which will be described later, are stored. A casing 5 having a self-sectional shape is assembled coaxially with the cylinder housing 3, and the casing 5 is detachably fixed by fastening the flange portion 5a with four bolts 6. .

In the casing 5, a connecting lever 7 is installed by connecting the shift rod 4 and the oil damper device 2, through which the damper force of the oil damper device 2 is applied. It is comprised so that the shift rod 4 may be provided.

For this reason, the coupling lever 7 is arrange | positioned in the direction orthogonal to the shift rod 4, The base end part 7a is the cylinder which the spline couples with the one end part 4a of the shift rod 4 in which the spline was formed. It is formed in a shape, whereby the front end portion 7a is in the same direction (shift rod 4) together with the shift rod 4 in a state where the proximal end portion 7a is coupled to the end portion 4a of the shift rod 4 and the spline. Can be rotated in the direction orthogonal to the axial direction.

Thus, the tip portion 7b of the coupling lever 7 protrudes toward the oil damper device 2 from the opening 8 formed in the lower surface of the casing 5.

In the casing 5 described above, the first retainer 9 and the second retainer 10 are provided on both the left and right sides with the base end portion 7a of the coupling lever 7 interposed therebetween.

The first retainer 9 is provided on the opening 5b side of the casing 5 in order to rotatably support the one end 4a of the shift rod 4 protruding from the cylinder housing 3, The tip is formed of a small diameter portion 9a to be inserted into the cylinder housing 3 and a large diameter portion 9b fixed to the inner circumferential surface of the casing 5.

In the small diameter portion 9a of the first retainer 9, an oil damper seal member 11 is provided. The oil damper seal member 11 provides a cylinder housing 3 and a casing 5 with each other. The damper oil is prevented from leaking during assembly.

Moreover, the sealing member 12 is fitted in the outer peripheral surface of the large diameter part 9b, and 0 ring is used as this sealing member 12, for example.

Furthermore, in the end surface of the large diameter part 9b, the step-shaped locking part 13 corresponding to the side surface of the connection lever 7 base end part 7a is formed, and this locking part 13 of the connection lever 7 is formed. The proximal end 7a is engaged.

Further, a gear oil seal member 14 is provided at the opening end 3a of the cylinder housing 3 so as to face the oil damper seal member 11, and the cylinder housing is provided by the gear oil seal member 14. At the time of assembly with (3) and casing 5, gear oil is prevented from invading into casing 5.

On the other hand, the second retainer 10 is provided on the opposite side to the opening portion 5b of the casing 5 and is fixed to the small diameter portion 10a disposed on the coupling lever 7 shaft and the inner peripheral surface of the casing 5. It is formed by the large diameter part 10b.

On the end surface of the small diameter portion 10a, a stepped 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 of the connecting lever 7 is formed on the locking portion 15. 7a) is to be engaged.

Therefore, in the state where the casing 5 fixes the retainer 10 to the casing 5 before assembly with the cylinder housing 3, and the base end part 7a and the retainer 9 are put in, both sides of the base end part 7a are provided. Since the addition engages with the locking portions 13 and 15 of the first and second retainers 9 and 10, the fall of the connecting lever 7 is prevented.

In the lower part of the casing 5, the oil damper device 2 is provided separately from the shift rod 4 in association with the coupling lever 7.

The oil damper device 2 has a cylindrical damper housing 16 filled with oil as a pressure fluid therein, and the damper housing 16 is attached to the lower surface of the casing 5.

The upper surface of the damper housing 16 is provided with an insertion opening 17 corresponding to the opening 8 of the casing 5, and a sealing member between the damper housing 16 and the casing 5. (18) is provided.

Inside the damper housing 16, a pair of left and right covers 19 and 20 are provided to close both end openings, and a cylindrical damper cylinder 21 between these covers 19 and 20 is provided. ) Is installed.

The damper cylinder 21 is formed to be smaller than the inner diameter of the damper housing 16, and is arranged to form an oil passage 22 between the outer circumferential surface of the damper cylinder 21 and the inner circumferential surface of the damper housing 16. .

In the damper housing 16, two upper and lower chambers planned by the damper cylinder 21 are provided, and the upper chamber is an oil chamber 23 filled with oil.

In the lower chamber, a damper piston 24 is slidably installed in association with a connecting lever 7 which is a damper force applying member, and two damper chambers 25, 26 are formed by the damper piston 24. It is formed in the left and right sides of the damper cylinder 21.

The orifices 27, 28 and through holes 29, 30 communicating with the oil passage 22 are formed on the outer circumferential wall of the damper cylinder 21 located in the damper chambers 25, 26 described above. ) Are open, and these damper chambers 25 and 26 communicate with the oil chamber 23 via the orifices 27 and 28, the through holes 29 and 30 and the oil through holes 22.

In addition, as shown in FIGS. 2 and 3, the orifices 27 and 28 are provided one at each of the left and right ends of the damper cylinder 21.

On the other hand, the through holes 29 and 30 on both the left and right sides are symmetrical in the axial direction with respect to the neutral position of the coupling lever 7 in the non-operating state of the oil damper device 2, and the damper piston in the neutral state ( 24 is provided in the damper cylinder 21 part located in the vicinity of the edge part.

Furthermore, the through holes 29 and 30 are installed at positions where both of them are in the open state near the neutral position of the connecting lever 7, whereby the damper piston 24 slides at the neutral position to start the damper action. The oil in the damper chambers 25 and 26 is discharged to the oil passage 22 side through the through holes 29 and 30 until it is.

In addition, the through holes 29 and 30 on both the left and right sides are provided at positions in which one is blocked by the damper piston 24 in the operating state of the oil damper device 2 and the other is opened.

That is, the through-holes 29 and 30 on both the left and right sides thereof do not perform the damper action near the neutral position of the oil damper device 2 and until the oil damper device 2 becomes neutral after operation. In order to prevent the damper action, the damper chambers 25 and 26 and the oil passage 22 and the oil chamber 23 are provided so as to communicate with each other in the place other than the orifices 27 and 28.

Therefore, a plurality of through holes 29 and 30 are provided at respective positions on the outer circumferential wall of the damper cylinder 21 at regular intervals in the circumferential direction.

These apertures 29 and 30 may be plural in the case of the same diameter as the orifices 27 and 28, and may be one in the case of a diameter larger than the orifices 27 and 28.

Moreover, the through-hole 31 is opened in the substantially center outer peripheral wall of the damper cylinder 21 in the axial direction corresponding to the insertion opening 17 of the housing 16, and this through-hole 31 and the engaging member The damper cylinder 21 is prevented from rotating by combining the 32 together.

In addition, although the through holes 29 and 30 may be circular, as shown in FIG. 5A, FIG. 5, it forms in planar triangular shape which the tip becomes thin toward the left and right ends 21 of the damper cylinder 21, The area near the neutral portion may be large, and the areas on the left and right sides may be reduced.

When such triangular through holes 29 and 30 are used, the damper becomes gradually efficient as the damper piston 24 moves from the neutral position to the left and right sides.

On the other hand, the longitudinal hole 33 is opened in the substantially central portion of the damper piston 24 in the axial direction, and the damper piston (B) is inserted by inserting the tip portion 7b of the connecting lever 7 into the vertical hole 33. 24 and the connecting lever 7 are configured to connect with each other.

Further, inside the damper piece 24, connecting passages 36 and 37 are provided which have ball-shaped check valves 34 and 35 at their respective positions, and these connecting passages 36, The oil chamber 23 and the damper chambers 25 and 26 communicate with each other when the check valves 34 and 35 are opened through the 37 and the check valves 34 and 35.

The check valves 34 and 35 are always pressurized to the valve seats 34a and 35a by the pressure springs 38 and 39, and the oil in the oil chamber 23 is in the damper piston 24. The oil in the damper chambers 25 and 26 flows through the damper chambers 25 and 26 but does not flow into the oil chamber 23 through the damper piston 24.

In the above-described oil damper device 2, when the gear input of a transmission (not shown) is carried out (when moving from the neutral position to the shift position), the connecting lever 7 together with the shift rod 4, for example, as shown in FIG. When rotated clockwise as indicated by the dashed line, the damper piston 24 slides from the neutral position to the left side with the check valve 34 on the left side closed, so that the oil in the damper chamber 25 is reduced to the orifice 27 and the like. It flows into the oil chamber 23 through the oil passage 22, and a damper action is performed.

Then, after the shift rod 4 is rotated by a predetermined amount in the neutral position, the damper force in 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), thereby eliminating the shift operation force immediately after completion of synchronization. Therefore, there is no gear collision during gear insertion and a smooth shift. The operation is performed.

Furthermore, the left through hole 29 is opened until the damper device 2 starts the damper action, and oil in the left damper chamber 25 is passed through the through hole 29 by the damper piston 24. Since it is sent to 22 and the oil chamber 23 side, gear input is performed smoothly.

In addition, when the gear shifting of the transmission described above is carried out (when shifting from the shift position to the neutral position), the damper piston 24 slides in the right direction, so that the shift rod 4 is halved through the connecting lever 7. Rotate clockwise and return to neutral position.

At this time, since the oil in the oil chamber 23 presses the check valve 34 through the connecting passage, the check valve 34 is isolated from the valve seat 34a by resisting the pressing force of the pressure spring 38.

In addition, since the oil chamber 23 and the damper chamber 25 communicate with each other via the connection passage 36 of the damper piston 24, the damper piston 24 moves in the right direction.

Further, the right through hole 30 is opened until the damper piston 24 returns to the neutral position, and the right damper chamber 26 opens through the through hole 30 and the oil passage 22. ), The damper action is not performed until the damper device 2 is in a neutral state.

That is, the damper apparatus 2 is comprised so that it may operate only at the gear input of the transmission which originally requires a damper action.

When the connecting lever 7 is rotated counterclockwise in FIG. 2, the damper piston 24 slides in the right direction to perform the same operation.

In the oil damper device 2 of the present embodiment, the through-holes 29 and 30 on both the left and right sides opened and closed by one damper piston 24 are gears of the transmission inherently requiring a damper action due to their existence. It operates only when it is turned on and does not act as a damper until it is near the neutral state or after the operation, so the structure is simple and does not cause cost increase, and the gear input and removal of the transmission is performed smoothly and quickly. can do.

Furthermore, since the oil damper device 2 of the present embodiment is installed separately from the shift rod 4 and connected to the shift rod 4 through the connecting lever 7, the shift rod 4 and the oil damper There is no problem that the concentricity of the device 2 becomes poor, so that the damper action of the oil damper device 2 is effectively performed, and even if the oil damper device 2 is installed, the transmission operation device 1 operates normally. This is not disturbed.

As mentioned above, although one embodiment of the present invention has been described, the present invention is not limited to the above-described embodiment, and various modifications and changes are possible based on the technical idea of the present invention.

For example, in the above-described embodiment, although the oil damper device 2 is provided in the transmission operating device 1, if the shock applied to the component or the like needs to be absorbed by the damper action, the transmission operating device 1 It can also be installed in other devices.

As described above, the oil damper device according to the present invention is a damper piston which is installed in a sliding manner in conjunction with a damper force applying member, and forms damper chambers on the left and right sides of the damper cylinder, and the damper cylinders located in these damper chambers. Orifices and holes are provided on the wall to communicate with the external oil passages, and the damper piston slides at the neutral position to be discharged to the oil passage shaft through the oil holes of the damper chamber until the damper action starts. Since the damper action is not performed in the vicinity of the neutral position where the damper force is not required, it is possible to quickly return to the neutral position after the operation.

Therefore, when the oil damper device of the present invention is provided, for example, in the transmission operation device, since the damper action is inherently performed only, the shift operation of the transmission can be performed smoothly and quickly.

In addition, in the oil damper device of the present invention, since the through hole is provided at a predetermined position of the damper cylinder in relation to the damper piston, the structure is simple and the part cost does not increase, which is economically advantageous.

Claims (1)

A damper cylinder (21) filled with oil therein and a damper cylinder (21) disposed in the damper housing (16) and arranged to form an oil passage (22) between the damper housing (16); The damper cylinder 21 is provided with a damper piston 24, which is installed in a sliding manner in cooperation with the damper force applying member 7, respectively, and the damper piston 21 is provided on both the left and right sides of the damper cylinder 21 described above. Orifices 27, 28 and through holes 29, 30 formed in the wall portions of the damper cylinders located in these damper chambers, in addition to forming 25), 26). Respectively, and the oil of the damper chamber is discharged to the oil passage 22 through the through holes 29 and 30 until the damper piston 24 slides at the neutral position to start the damper action. Oil damper device, characterized in that configured to.