KR100311320B1 - Transmission operation device - Google Patents

Abstract

An object of this invention is to improve water resistance and earthquake resistance, and to ensure durability.

In order to achieve the above object, the present invention has a cylinder housing (2) and a piston (4, 6) freely slided in the cylinder housing, and in addition to the supply and discharge of fluid in the cylinder housing (2) by the piston An air supply and pressure pressure chamber 8a for suctioning and an air supply and pressure pressure chamber 8b and 9 for selectively supplying and discharging fluid are provided, and the cylinder housing 2 has respective pressure chambers. A plurality of cylinder side passages are formed in communication with each other, and a check valve is provided to prevent the inflow from the outside through each of the discharge passages connected to the plurality of pressure chambers. Orifices 33a, 63, and 64 are provided as throttles on the intake and exhaust passages 33 and the like connected to the supply / exhaust pressure chamber 8a. A check valve is provided for preventing coming from.

Description

Gearbox controls

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission operating apparatus, and is applicable to the improvement of both a select operation actuator and a shift operation actuator of the transmission operation apparatus.

In buses, trucks, and the like having large transmissions, actuators are provided in the transmission operation device, and smooth transmission operation can be performed with light force.

Fig. 14 is a longitudinal sectional view showing an actuator for shift operation and a switching valve of a transmission operating device disclosed in Japanese Patent Application Laid-open No. Hei 8-323799, and Fig. 15 is a partially enlarged sectional view thereof. In this shift operation actuator 1, a cylinder hole 3a and a cylinder hole 3b having a larger inner diameter are formed in a cylinder housing 2.

The main piston 4 slides freely in the small cylinder hole 3a, and the main piston 4 is provided in the piston rod 5. In the large cylinder hole 3b, a free piston 6 disposed at one end of the piston rod 5 is accommodated, the main piston 4 and the free piston 6, and the partition 7 provided at an intermediate position. By this, three pressure chambers 8a, 8b, 9 are formed in the cylinder housing 2 separately.

In addition, the actuator 1 includes a plurality of cylinder-side passages 30 to 34, 40, 41, 43 to 46 (see FIGS. 16 and 17) and the like connected to the corresponding pressure chambers 8a, 8b, and 9, respectively. Each valve side passage 36, 37, 52 to 57, 59, 72 (refer to FIGS. 17 and 18) formed in the housing 2, each valve housing 18, 19 being connected to the corresponding cylinder side passage; And a solenoid valve, each having the same type of switching valve body, and three solenoid switching valves MVa, MVb, and MVc for switching to supply and discharge compressed air to the three pressure chambers 8a, 8b, and 9, respectively It is installed in (2).

The actuator for shift operation uses compressed air from an air tank (not shown) through each of the electromagnetic switching valves MVa, MVb, and MVc to the respective pressure chambers 8a, 8b, and 9 via corresponding passages. Supplied. Then, by supplying compressed air to the pressure chamber 9 at the end portion, the free piston 6 abuts on the partition 7 and is positioned, and at the same time, the compressed air is supplied to the pressure chamber 8b. By supplying, the lever 15 is moved by its striker 13 which moves until the piston rod 5 reaches the free piston 6 and moves together with the piston rod 5. Rotate around 14). As a result, the main piston (4) a neutral position in the shift pattern (shift pattern) (C) shown in Fig. 14 N ₁ ~N position in any of the _three. Further, when compressed air is supplied to the pressure chamber 8a while all the pressure chambers 8a, 8b, and 9 are open to the atmosphere, a shift operation is performed toward the position F of the shift pattern C. Furthermore, when compressed air is supplied to the pressure chamber 8b in the state shown in FIG. 14, the shift operation is performed toward the position R of the shift pattern C. FIG.

The select operation actuator disposed along the vertical direction with respect to the shift operation actuator 1 also operates by supplying compressed air to each of the three pressure chambers through the respective solenoid valves via a predetermined passage. The operation force is transmitted to the operation lever to select operation.

Each solenoid switching valve of each solenoid switching valve MVa, MVb, MVc and the select operation actuator opens the corresponding pressure chamber in the off state in the non-excited state to the atmosphere, At (on) connect the corresponding pressure chamber to the air tank. Control of each electromagnetic switching valve is made by a controller.

In addition, the shift operation actuator 1 and the select operation actuator are disposed so as to correspond to the shift pattern C shown in FIG. 14. Therefore, the select operation actuator can be operated only when the main piston 4 of the shift operation actuator 1 is in the intermediate position of the first cylinder hole 3a. According to the operation of the shift lever, only when the lever 15 which receives the operating force from the actuator for select operation is in a position corresponding to any of the positions N ₁ , N ₂ , and N ₃ of the shift pattern C The shift operation actuator 1 can be operated.

Then, the pressure chamber 8a of the actuator 1 is between the pressure chamber 8b and the pressure chamber 9, and the discharge passage 33 at the time of opening after the operation and the pressure supply process made through the passage 44 or the like at the time of operation. In addition to the evacuation process performed through the gas, there is an intake process performed through the passage 33 when the piston rod 5 is pressed by the free piston 6 and the main piston 4 moves. On the other hand, in the pressure chamber 8b and the pressure chamber 9, there is no intake process, the pressure supply process made through the passage 45 and 72 at the time of operation, and the exhaust hole 18c at the time of opening after operation (FIG. 17). Etc.), there is an exhaust process.

In the actuator of the conventional transmission operating device, in the pressure chamber 8a, the exhaust gas is ejected into the atmospheric pressure chamber 62 inside the cylinder housing 2, and since the force is strong, the exhaust portion of the piston rod 5 in the bearing portion 16 There is a problem of promoting wear by scattering a lubricant such as grease. In the pressure chamber 8b and the pressure chamber 9, there is a problem that intrusion of water and dust by washing or rain water is concerned.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and an object thereof is to provide a transmission operating apparatus that can improve water resistance and shock resistance, and ensure durability without scattering lubricant.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a partial sectional view showing the main parts of a shift operation actuator and a switching valve of a transmission operating device according to an embodiment of the present invention terminated at respective center positions;

2 is a partial cross-sectional view taken along the line A-A of FIG. 1;

3 is a front view showing a part of the switching valve of FIG.

4 is a plan sectional view in a position passing through the center of the switching valve of FIG.

5 is a cross-sectional view of FIG.

6 is a cross-sectional view taken along the line B-B of FIG.

7 is a cross-sectional view taken along the line C-C of FIG.

8 is a cross-sectional view taken along the line D-D of FIG. 4;

9 is a cross-sectional view taken along the line E-E of FIG.

10 is a cross-sectional view taken along the line F-F of FIG.

11 is a cross-sectional view taken along the line G-G of FIG.

12 is an enlarged cross-sectional view taken along the line H-H of FIG. 1;

13 is a partial sectional view showing a modification of the present invention;

14 is a longitudinal cross-sectional view at a central position showing the entire shift operation actuator and the switching valve of the conventional transmission operating device;

FIG. 15 is a partial cross-sectional view illustrating the main portion of FIG. 14 terminated and enlarged; FIG.

16 is a cross-sectional view taken along the line I-I of FIG. 15;

17 is a cross sectional view of FIG. 15;

18 is a cross-sectional view taken along the line J-J of FIG. 15.

<Description of Drawing>

MVa to MVc ... electromagnetic switching valve

1 A ... actuator for shift operation

2 ... cylinder housing

4 ... main piston

5 ... piston rod

6 ... free piston

7. The bulkhead

8a ... Suction pressure chamber

8b, 9 .. Pressure distribution chamber

18 ... valve housing

30. Common passage for supply

31,32 ... Cylinder side supply and distribution passage

33. Cylinder side suction discharge passage

33a ... orifice (axle)

34 ... Cylinder side supply passage

36,37 ... Valve supply passage

40 to 46. Orthogonal passage

51 ... Working pressure chamber

52,53 ... Supply passage

54 ~ 57 .. Branch passage

59. Expressway

63,64 Orifice

66. Ring sealing member

72 ... Expressway

In order to achieve the above object, the present invention includes a cylinder housing and an actuator having a piston freely slide in the cylinder housing, the actuator formed by dividing a plurality of pressure chambers in the cylinder housing by the piston, the cylinder A transmission operating device having a plurality of cylinder-side passages connected to the plurality of pressure chambers and selectively supplying and discharging fluid to the plurality of pressure chambers, each connected to the plurality of pressure chambers. A check valve for preventing inflow from the air is provided in the discharge passage of the air, and the compressed air from each pressure chamber is discharged through the check valve.

The transmission operating apparatus according to the embodiment of the present invention will be described in detail with reference to the drawings, taking the case of application to a shift operation actuator as an example. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a partial cross sectional view showing a main portion of a shift operation actuator and an electromagnetic switching valve of a transmission operating device according to an embodiment of the present invention terminated at almost a central position thereof, and Fig. 2 is a partial cross sectional view taken along AA of Fig. 3 is a front sectional view of FIG. 1, FIG. 4 is a partial cross sectional view of FIG. 1, and FIG. 5 is a cross sectional view of FIG. 1, which is the same as or corresponding to the conventional case shown in FIGS. The same code is given.

The shift actuator 1A of the transmission operating device is formed of a cylinder housing (B) by a main piston 4, a free piston 6, and a partition wall 7 provided in a hollow piston rod 5. 2) A supply / discharge pressure chamber 8a in which suction is performed in addition to the supply and discharge of the fluid, and a supply / discharge pressure chamber 8b in which supply and discharge of the fluid is selectively performed, and a supply / discharge pressure chamber 9 Are formed separately, and three solenoid switching valves MVa, MVb (see FIG. 4) and MVc for switching to supply and discharge compressed air as pressure fluid to the pressure chambers 8a, 8b, and 9 are provided in the valve housing 18. , 19).

In addition, as for the actuator 1A for shift operation, the cylinder housing 2 consists of several cylinder side passages 30-34, 40, 41, 43-46 etc. which are connected to each corresponding pressure chamber 8a, 8b, 9, and the like. Each valve housing passage 36, 37, 52 to 57, 59, etc., which are connected to the corresponding cylinder cylinder passages, are formed in each valve housing 18 and 19, and are connected to the supply / exhaust pressure chamber 8a. An orifice 33a, which is an throttling portion of the suction discharge passage 33, and an orifice 63, 64 as an throttling portion of a separate suction discharge passage; 9) Install check valves 23, 24 and 25 (refer to FIGS. 3 and 5) to prevent inflow from the outside through the discharge passage connected to 9), and to discharge air from the corresponding pressure chambers through these check valves. It is. Then, the shift operation actuator 1A and the select operation actuator operate by compressed air supplied from an air tank (not shown).

Moreover, the actuator 1A for shift operation has the cylinder housing 2 between the flange 7a of the partition 7 between the 1st block 11 and the 2nd block 12. Moreover, as shown in FIG. The valve housings 18 and 19 are mounted on the side surfaces of the first block 11 and the end portions of the second block 12, and the main piston is disposed in the first block 11. Two pressure chambers 8a and 8b are divided and formed by (4) and the partition 7, and the free piston 6 side pressure chamber 9 is divided and formed in the 2nd block 12. As shown in FIG. In the cylinder housing 2, a stopper 49a for the main piston 4 and a stopper 49d for the free piston 6 are provided, and a common supply port 19b for the valve housing 19 is provided. ).

The cylinder housing 2 has thick walls 11a and 12a on one side of the first block 11 and the second block 12, and the thick walls 11a and 12a and the valve housing as shown in FIG. A common passage 30 for supply is formed at intervals parallel to the axis over 19, and two supply and discharge passages 31 and 32 are provided on the thick wall 11a of the first block 11; One suction discharge passage 33 is formed, and another supply and discharge passage 34 is formed on the end wall 12b of the second block 12. The valve housing 19 is provided with a valve side supply passage 36 branched at right angles from the common passage 30.

As shown in FIG. 5, the check valve 25 for the supply / discharge pressure chamber 9 has a cylinder 26 connected to a corresponding discharge passage 79 provided in the valve housing 19, and a tip thereof. An exhaust valve body 27 contacting and spaced apart from the valve seat 26a of the valve seat, and a compression spring 28 for applying a force in a direction in which the exhaust valve body 27 contacts the valve seat 26a. The cover 29 is covered with the exhaust valve body 27, the compression spring 28, and the like, and the male thread 26b of the outer circumference of the cylinder 26 is inserted into the screw hole 19e of the valve housing 19. They are screwed upwards to the installation seat 19d of the valve housing 19. Then, the check valve 25 resists the elastic force of the compression spring 28 only at the time of exhaust, and the exhaust valve body 27 is separated from the valve seat 26a to open the discharge passage 79 in the atmosphere. The other two check valves 23 and 24 are installed in the valve housing 18 as shown in FIG. 7 and are respectively connected to the corresponding discharge / pressure pressure chamber 8a and the discharge-pressure pressure chamber 8b. The same reference numerals are used for the same parts as the check valves 25 described above except that the cylinders 26 are screwed to the screw holes 18e that are orthogonal to 77 and 78 and are opened to the mounting seat 18d. And duplicate descriptions are omitted.

The supply common passage 30 continues straight from the supply port 19b to the middle position of the thick wall 11a of the first block 11, and as shown in Figs. Each of the direct traffic paths 40 and 41 is continued from the intermediate position, and passes through the direct communication path 40 at the end and the valve side supply passage 52 connected thereto, and the branch paths 54 and 55 shown in FIG. To the valve chambers 97 of the corresponding electromagnetic switching valves MVa and MVb, and to the pressure chambers 8a and 8b on both sides of the main piston 4, respectively. Is connected to the operating pressure chamber 51 of the corresponding electromagnetic switching valves MVa and MVb respectively through the valve-side supply passage 53 and the branch passages 56 and 57 shown in FIG.

In FIG. 2, two parallel long and short cylinder side supply and discharge passages 31 and 32 on both sides of the common passage 30 are continuous from one end of the first block 11 in contact with the partition 7 to the intermediate position, respectively. And straight orthogonal passages 43 to 46 which are orthogonal to the intermediate positions, and are orthogonal to orthogonal to the end positions of the short side delivery passage 31 and the intermediate position of the long side delivery passage 32. Are respectively connected to the supply and discharge passage 59 connected to the outlets of the solenoid selector valves MVa and MVb, respectively orthogonal to each other at an intermediate position of the short supply passage 31 and at the end of the long supply passage 32. 44 and 45 are connected to respective corresponding pressure chambers 8a and 8b. The cylinder side suction discharge passage 33 is continuous from one end of the first block 11 to the position corresponding to the atmospheric pressure chamber 62 in FIG. 2, and the orifice 63 orthogonal at the intermediate position is provided with the valve side orifice ( 64). And the cylinder side suction discharge passage 33 is connected to the atmospheric pressure chamber 62 via the orthogonal orifice 33a which is orthogonal.

The two solenoid selector valves MVa and MVb corresponding to the two pressure chambers 8a and 8b are installed in a common valve housing 18 as shown in FIG. 4, and the thick wall 11a of the first block 11 is provided. The outer surface is provided so that the annular sealing member 91 which surrounds the outer periphery of a channel | path at the mutual junction part may be sandwiched between the 1st block 11 and the valve housing 18 in a sandwich structure. . In addition, the electromagnetic switching valves MVa and MVb are separated from each other by the switching valve body 85, the valve lifter 86, the fixing member 87 on which the valve seat 87a is formed, and the compression spring 88, respectively. A pair of solenoid valve body 89, an electromagnetic coil 90, etc. which receive a force by the force is provided. The pair of solenoid valve bodies 89 are housed in a common cylinder 94, and the cylinder 94 is urged in the direction of the valve seat 87a by a compression spring 95 disposed on its outer circumference. have. In the valve housing 18, a valve seat 18a is formed in each valve chamber 97 whose one end is sealed with a stopper 96, and a spring of the compression spring 92 that applies elasticity to the valve lifter 86. 6, the supply passage 52 connected to the chamber 93, the supply passage 52 connected to the valve chamber 97, and the valve lifter 86 as shown in FIG. 7. An orifice 64 connected to the hole to which the slide slides, and a supply passage 53 connected to the annular space 81 of the outer circumference of the fixing member 87, as shown in FIG. Is connected to the corresponding cylinder side passage.

The valve lifter 86 is integrated with the small diameter pressing portion 86a, the central hole 86b extending from the tip of the small diameter pressing portion 86a to the middle thereof, and the plurality of radial holes 86c subsequent thereto. Have The center hole 86b of the valve lifter 86 in the electromagnetic switching valve MVa is connected to the suction discharge passage 33 through the orifice 64 of the valve housing 18 and the orifice 63 drilled into the cylinder housing 2. Connected to the exhaust passage 77, the center hole 86b of the valve lifter 86 on the electromagnetic switching valve MVb is through a corresponding exhaust passage 78 opened in the valve housing 18. As shown in Fig. 4, the holding member 87 has a valve seat 87a to which the solenoid valve body 89 is in contact with and spaced apart, and the supply passage 53 bent in the middle of the valve seat 87a through the center of the valve seat 87a. ), One end of which is open to the annular space 82 of the outer circumference of the valve seat 87a and the other end of which is opened to the working pressure chamber 51 between the valve lifter 86 The straight connection hole 87c is provided.

As shown in FIG. 1, the electromagnetic switching valve MVc corresponding to the pressure chamber 9 on the side of the free piston 6 is formed on the outer surface of the end wall 12b of the cylinder housing 2 at the mutually joined portion. The annular sealing member 91 surrounding the outer circumference is fixed and installed, and as shown in FIG. 5, the solenoid valve body 89 and the electromagnetic coil 90, the switching valve body 85 in the valve housing 19, The valve lifter 86, the holding member 87, and the like are provided, and the supply passage 36 is connected to the annular space 81 of the outer circumference of the holding member 87. In the valve housing 19, a valve seat 19a is formed in a valve chamber 97 whose one end is closed by a stopper 96, and as shown in FIG. 9, a passage in which the supply passage 36 is perpendicular to this. An exhaust passage 79 is connected to a valve chamber 97 through 98, and as shown in FIG. 10, an exhaust passage 79 is connected to a hole through which the valve lifter 86 slides, and as shown in FIG. The supply passage 36 is connected to the common passage 30, and as shown in FIG. 12, the spring chamber 93 of the compression spring 92 in which the supply and discharge passage 72 exerts an elastic force on the valve lifter 86. As shown in FIG. ), And as shown in FIG. 1, is connected to the corresponding cylinder supply / discharge passage 34.

The valve lifter 86 is forced by the compression spring 92 disposed on the outer circumference of the small diameter pressing portion 86a in a direction falling from the switching valve body 85, and is stopped at the tip of the small diameter pressing portion 86a. The central hole 86b up to and the subsequent radial holes 86c are connected to the exhaust passage 78. The holding member 87 has a valve seat 87a to which the solenoid valve body 89 is in contact with and spaced apart, and is a bent connection hole connected to the supply passage 36 bent in the middle of the valve seat 87a. 87b) and a straight connection hole 87c, one end of which is open to the annular space 82 of the outer circumference of the valve seat 87a, and the other end of which extends into the supply passage 36. The bent connecting hole 87b is connected to the supply passage 36 through the annular space 81 of the outer circumference of the fixing member 87, and the straight connecting hole 87c is connected between the valve lifter 86 and the fixing member 87. It opens to the formed working pressure chamber 51.

The solenoid valve body 89 falls from the valve seat 87a when the electromagnetic coil 90 is excited by turning on the electromagnetic switching valve MVa. As a result, the compressed air which is always supplied to the supply port 19b is fed to the common passage 30, the supply passages 41 and 53 on the cylinder side and the valve side, the branch passage 56, the annular space 81, and the bent connection. It reaches the working pressure chamber 51 through the hole 87b and the straight connection hole 87c. Since the valve lifter 86 slides in response to the elastic force of the compression spring 92 by the boosting of the working pressure chamber 51, the valve lifter 86 is pushed away from the valve seat 18a by pressing the switching valve body 85, Compressed air, which is always supplied to the port 19b, enters the valve chamber 97 through the common passage 30, the supply passages 40 and 52 and the branch passage 54 on the cylinder side and the valve side. Moreover, this compressed air is supplied to the pressure chamber 8a through a passage 44 open to the supply and discharge passages 59 and 34 on the valve side and the cylinder side, the short cylinder side passage 31 and the pressure chamber 8a. Is supplied to, and exhausted from the other pressure chamber 8b through the check valve 24. Since the operation | movement of the electromagnetic switching valve MVb is substantially the same as that mentioned above, description is abbreviate | omitted.

The operation itself of the electromagnetic switching valve MVc is as described above. That is, the solenoid valve body 89 falls off from the valve seat 87a when the electromagnetic coil 90 is excited to ON. Accordingly, the compressed air which is always supplied to the supply port 19b is operated through the common passage 30, the supply passage 36, the annular space 81, the bent connecting hole 87b and the straight connecting hole 87c. The pressure chamber 51 is reached. As the pressure of the working pressure chamber 51 is increased, the valve lifter 86 slides in resistance to the elastic force of the compression spring 92, so that the switching valve body 85 is pushed down from the valve seat 19a, so that the supply The compressed air which is always supplied to the port 19b enters the valve chamber 97 through the supply passage 36. Furthermore, this compressed air is supplied to the pressure chamber 9 of the free piston 6 side through the supply and discharge passages 72 and 34 on the valve side and the cylinder side to slide the free piston 6. By this sliding movement, when the piston rod 5 and the main piston 4 move to the left in Fig. 1, air is sucked into the pressure chamber 8a. This air suction takes place through orifice 33a and orifice 64 followed by orifice 63.

Since the actuators 1A according to the embodiment of the present invention are all provided with the check valves 23 to 25 facing upwards, a passage required for the cylinder housing 2 without fear of distorting the cover 29 during transportation or the like. At the same time, since the passages corresponding to the valve housings 18 and 19 are formed to install the electromagnetic switching valve in the cylinder housing 2, there is an advantage that the size can be easily reduced without requiring external piping.

Since the operation of the transmission operating apparatus according to the embodiment of the present invention is the same as the conventional one shown in Fig. 14, description thereof is omitted.

In addition, this invention is not limited to the said Example, It can change variously. For example, it can be applied not only to the actuator for shift operation 1A but also to the actuator for select operation. When the free piston 6 is located at both ends of the cylinder housing 2, the suction discharge passage is provided for each electromagnetic switching valve MVa, It is preferable to provide each with respect to MVb, and when adding an electromagnetic switching valve, both sides of the cylinder housing 2 may be made into a thick wall. In addition, a check valve 69 as shown in FIG. 13 may be attached instead of the orifices 63 and 64 as the throttle portions. In this case, a notch 69c is formed in a part of the valve seat 69b in which the valve body 70 in the valve chamber 69a is in contact with and spaced apart. When exhausting, the valve is closed to return to the passage 33. Prevention and smooth inhalation from the notch 69c during inhalation.

The present invention includes a pressure supply pressure chamber in which the supply and discharge of fluid is selectively provided in the plurality of pressure chambers, and a check valve for preventing inflow from the outside is installed in a discharge passage connected to the pressure supply pressure chamber, and the check valve Since the inflow into the discharge passage from the outside is prevented by the check valve by discharging the fluid from each of the pressure chambers through, the water resistance and the shock resistance are improved. In addition, the plurality of pressure chambers are provided with a supply / exhaust pressure chamber for suctioning in addition to supplying and discharging fluid, and have a throttling portion in the suction discharge passage connected to the supply / exhaust pressure chamber. This prevents the lubricant from scattering and ensures durability.

Claims (2)

A cylinder housing and a piston freely stored in the cylinder housing; an actuator formed by dividing a plurality of pressure chambers in the cylinder housing by the piston, wherein the plurality of pressures are provided. A shifting device for shifting the transmission by forming a plurality of cylinder side passages connected to the chamber and selectively supplying and discharging compressed air to the plurality of pressure chambers via the plurality of cylinder side passages. To And a check valve for preventing inflow from the atmosphere in the plurality of cylinder-side passages connected to the plurality of pressure chambers, and discharging the compressed air supplied from the pressure chamber to the atmosphere through the check valve. Transmission controls. The method of claim 1, The plurality of pressure chambers are provided with a supply / exhaust pressure chamber in which atmospheric air is also sucked in addition to supply and discharge of compressed air, and discharge of compressed air and suction of air connected to the supply / exhaust pressure chamber. A transmission operating device, wherein a throttle portion is formed in a suction discharge passage to be performed.