JPH08334172A - Booster device for transmission operation - Google Patents

Abstract

PURPOSE: To provide a booster device for transmission operation capable of simplifying a connecting mechanism of an output shaft on the side of the booster device and an operation shaft on the side of a transmission, certainly transmitting operating physical force, easily carrying out its assembly and disassembly work, reducing a working space at the time of repair, etc., reducing the number of parts and efficient in cost. CONSTITUTION: Fitting flute parts 63, 64 are formed on both sides at a specified position of an output shaft 15 and a lock flute part 65 of width Wc which is wider than width Wb of the fitting flute parts 63, 64 is formed on an input shaft 12 in correspondence with the fitting flute parts 63, 64 in a booster device for transmission operation to be energized by pressure fluid supplied to a piston body provided on the side of the output shaft 15. Thereafter, fitting members 57, 58 supported on a reverse U letter shaped connecting member connected to the side of an operating shaft of a transmission free to revolve are fit in the fitting flute parts 63, 64 free to vertically move, and their inward parts are positioned in the lock flute part 65.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission operating booster device for reducing the operating force of a transmission used in a vehicle or the like. More specifically, it relates to a connecting portion between the output shaft of the booster device and the operation shaft on the transmission side.

[0002]

2. Description of the Related Art FIG. 8 is a schematic perspective view showing a main part of a transmission operating device. In the figure, reference numeral 1 denotes a shift-and-select shaft that is an operation shaft on the transmission side, and performs a select operation by an operation in the A direction and a shift operation by rotating in the B direction. This shift and select shaft 1
The change lever 2 is connected via a link mechanism so that it can be actuated in the axial direction A in response to a select operation. Further, a shift member 3 is fixedly attached to the shift and select shaft 1, and an engaging portion 4 that can be selectively engaged with the shift member 3 and a shift fork 5 that corresponds to a gear of each predetermined speed. A plurality of sets of shift rods 6 are provided, and the selection operation is performed by selectively engaging these.

The change lever 2 is connected to the input shaft side of a booster device 7 for boosting using a pressurized fluid such as compressed air, which will be described later, and shifts through an output shaft 8 of the booster device 7. Is configured to do. That is, when the output shaft 8 operates in the axial direction C following the shift operation of the change lever 2, the shift and select shaft 1
Rotates in the B direction to move the already selected shift rod 6 to D
The shift operation is performed by operating in the direction. The output shaft 8 of the booster device 7 is arranged orthogonal to the shift and select shaft 1, and is connected to the end of the shift and select shaft 1 via first and second connecting rods 9 and 10. By connecting the pins 11 so as to be rotatable about each other, the shift and select shaft 1 is provided with a degree of freedom in the A direction.

On the other hand, regarding the connecting portion between the output shaft of the booster device and the shift-and-select shaft that is the operating shaft on the transmission side, the connecting mechanism is simplified to efficiently transmit the operating force. An improved technique to be tried is disclosed (Japanese Utility Model Laid-Open No. 5-27420). In this technology, the output shaft and the input shaft of the booster device penetrate the support shaft, and both ends of the support shaft are slid into the long holes formed in the forked part of the connecting member fixed to the operation shaft side of the transmission. A member that is pivotally supported in a vertically slidable manner through a member and that converts the axial movement of the output shaft into a swinging motion about the operation shaft of the transmission through the support shaft and the sliding member. Is.

[0005]

However, in the prior art relating to the connection between the output shaft of the booster device and the operation shaft on the transmission side, the output shaft and the input shaft of the booster device are penetrated by the support shaft. Therefore, not only is there a problem of cross-section loss regarding the input shaft, and not only is there a restriction on the shaft diameter, etc., but it is necessary to insert and remove the support shaft when assembling and disassembling this connecting part, which is not very workable and at the time of repair. There was a problem that the surrounding work space was needed. The support mechanism for slidably supporting the both ends of the support shaft in the vertical direction has a long hole formed in the forked portion of the connecting member, and a sliding member fitted in the long hole so as to be vertically slidable. Since both ends of the support shaft are rotatably supported by means of members, it is necessary to incorporate a fairly complicated structure in a small part, which not only has a problem in strength, but also that much. However, there were problems that the shape became large and the cost was high.

The present invention has been made in view of the above conventional circumstances, and its object is to further simplify the connecting mechanism between the output shaft on the booster device side and the operating shaft on the transmission side. With a simpler structure, the structural strength is effective and the operating force can be reliably transmitted, and the assembling and disassembling work is easy and the working space can be reduced during repairs. It is to provide a booster device for operating a transmission, which can be reduced in cost and is effective in terms of cost.

[0007]

In order to solve the above-mentioned problems, the present invention provides an input shaft connected to the change lever side,
A hollow output shaft that is concentrically arranged outside the input shaft so as to be relatively movable and that is connected to the operation shaft side of the transmission, and is supplied to a piston body provided on the output shaft side. In a booster device for operating a transmission that increases power by a pressurized fluid, a fitting vertical groove portion is formed on both sides of a predetermined position of the output shaft, and the fitting vertical groove portion is formed on the input shaft in correspondence with the fitting vertical groove portion. A locking vertical groove portion having a wider groove width is formed, and a fitting member is vertically movably fitted into the fitting vertical groove portion, and an inner portion of the fitting member is positioned in the locking groove portion. The technical means of connecting the output shaft to the operation shaft side of the transmission through a connecting member that rotatably supports the member is adopted.

[0008]

According to the present invention, the vertical groove portions directly formed on the output shaft and the input shaft of the booster device are adopted as guiding or locking means, and the fitting member is vertically movably fitted into these vertical groove portions. Since the output shaft on the booster device side and the operation shaft on the transmission side are connected to each other via the connecting member that rotatably supports, the operation force is directly transmitted, and a better transmission action can be obtained. Compared with the above-mentioned conventional technique in which the support shaft is penetrated, the cross-section loss for each shaft portion can be reduced, and the structure can be strengthened.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of the entire booster device showing an embodiment of the present invention, FIG. 2 is an enlarged vertical cross-sectional view showing a main part of a pressurized fluid supply mechanism, and FIG. FIG. In the figure, reference numeral 12 denotes a first connecting lever 13 which is connected to the change lever 2 via a connecting portion 13.
The input shaft is concentrically and relatively movable inside a hollow portion of an output shaft 15 slidably supported by the booster body 14, and is further connected to a second input shaft 17 via a connecting pin 16. ing. That is, in the present embodiment, the input shaft is configured by the first input shaft 12 provided inside the output shaft 15 and the second input shaft 17 connected via the connecting pin 16. As shown in the figure, at the end of the output shaft 15, a connecting mechanism 18 for connecting with the shift and select shaft 1 which is the operation shaft on the transmission side, which is a characteristic part of the present invention, is provided. However, this will be described in detail later.

On the outer peripheral surface of the output shaft 15, there is fixed a piston body 21 having two piston portions 19 and 20 arranged at intervals, and pressure chambers 22 on both sides thereof are fixed.
The compressed fluid such as compressed air supplied to the second
It is configured to follow the operation of the input shaft 17 and exert a power increasing action. A space 24 surrounded by the inner surface of the body 14 is formed between the pistons 19 and 20, and pressurized fluid from the supply port 25 provided in the body 14 is passed through the space 24. As described later, it is configured to supply to the valve mechanism portion.

A valve mechanism for controlling the supply of the pressurized fluid to the pressure chambers 22 and 23 is arranged between the second input shaft 17 and the output shaft 15. This valve mechanism is composed of two sets of control valves symmetrically arranged. That is, as shown in FIG. 2 and FIG. 3 in which one control valve portion is enlarged,
The control valve is integrally fixed to the output shaft 15 via locking pins 26 and 27, and is mounted on the valve seat blocks 30 and 31 having valve seat portions 28 and 29 and the outer peripheral surface of the second input shaft 17. And a slide valve body 35, 36 which is fitted in an airtight and slidable manner via an intermediate pipe 32 fixed in an airtight state and has abutment portions 33, 34 which abut against the valve seat portions 28, 29. ing. The slide valve bodies 35 and 36 are urged by a spring 37 in a direction in which the valve seat portions 28 and 29 are closed. The space 24 is provided between these two sets of control valves via a communication passage 38.
A space 39 communicating with is formed, and the supply of the pressurized fluid is controlled by opening and closing the outflow side of the space 39 with the valve seats 28 and 29. Further, lifters 40 and 41 that open the valve seat portions 28 and 29 are fitted to the second input shaft 17, and when the second input shaft 17 is shifted to the right in FIG. The slide valve element 35 is pushed rightward by the locking portion 42 provided at the end of the 2 input shaft 17 via the lifter 40, and the valve seat 28 side is opened. On the contrary, when the second input shaft 17 is shifted to the left in FIG.
The slide valve body 36 is pushed to the left via the lifter 41 by the end of the first input shaft 12 connected to the second input shaft 17 via the connecting pin 16, and the valve seat 29 side is opened. It The lifters 40 and 41 are biased in the valve non-opening direction by springs 43 and 44, respectively.

Next, the flow path of the pressurized fluid will be described with reference to FIG. Although one control valve portion will be described here, the same applies to the other control valve portion. As described above, the supply port 2 of the booster body 14
The pressurized fluid such as compressed air supplied to the
It is supplied to the space 39 formed between the two sets of control valves via the space 24 between 9 and 20 and the communication passage 38. Then, the supply of the pressurized fluid is controlled by opening and closing the valve seat portion 28 that contacts the outflow side of the space portion 39. That is, when the change lever 2 operates the second input shaft 17 to the right in the drawing, and the contact portion 33 is separated from the valve seat portion 28 and opened by the lifter 40, the pressurized fluid causes a gap. Flowing down, a gap between the outer peripheral surface of the lifter 40 and the inner peripheral surface of the valve seat block 30, and the flow path 4 formed in the valve seat block 30.
5, through the gap 46 between the outer peripheral surface of the valve seat block 30 and the inner peripheral surface of the output shaft 15 and the flow path 47 formed in the output shaft 15, the gas flows into the pressure chamber 22. Due to the inflow of the pressurized fluid into the pressure chamber 22, the piston body 21 is pressed to the right, and a boosting action following the operation of the change lever 2 is added. In this case, since the pressure chamber 22 increases in pressure immediately when the valve seat portion 28 is opened, the responsiveness of the operation is improved,
Operability can be improved. Also, as mentioned above,
The supply of the pressurized fluid is supplied through the space 24 formed between the piston portions 19 and 20. As a result, the pressure action in the axial direction of the output shaft 15 is canceled and the pressure fluid is biased in one direction as in the conventional example. Since the pressure effect is avoided, the feeling of operation is not impaired.

The pressurized fluid that has flowed into the pressure chamber 22 further passes through a throttle passage 48, which is a throttle element formed on the output shaft 15, between the inner peripheral surface of the output shaft 15 and the outer peripheral surface of the valve seat block 30. It is introduced into the formed accumulation chamber 49, and thereafter, through the flow path 50 formed in the valve seat block 30,
It flows into a reaction force chamber 51 formed between the valve seat block 30 and the lifter 40. When the pressurized fluid flows into the reaction force chamber 51, the reaction force of the boosting action applied to the output shaft 15 is transmitted to the change lever 2 so that the driver can sense the reaction of the operation. . In this case, as described above, the magnitude of the flow path resistance of the throttle flow path 48 and the capacity of the accumulation chamber 49 are selected to appropriately adjust the delay of the pressure rise of the reaction force chamber, thereby giving the feel of the change lever. Can be set to a good one.

As described above, it goes without saying that while one control valve portion is in the open state or the change lever 2 is in the neutral state, the other control valve portion is in the closed state. Absent. In the meantime, in the other control valve, the end portion of the lifter 41 and the contact portion 34 are in the separated state, and as a result of the gap being formed, the pressurized fluid remaining in the other pressure chamber 23 is The hollow portion of the second input shaft 17 flows backward through the supply path of the pressurized fluid, passes through the gap between the end portion of the lifter 41 and the contact portion 34, and the opening portion 52 formed in the second input shaft 17. And is exhausted from the exhaust pipe 53 shown in FIG. That is, the hollow portion of the second input shaft 17 is used as an exhaust passage for the pressurized fluid, but in this case, as described above, the inside of the hollow portion becomes substantially equal to the atmospheric pressure, so 2 No pressing force is applied to the input shaft 17.

Next, the output shaft 1 which is a feature of the present invention.
A detailed description will be given of the connecting mechanism 18 that connects the transmission 5 and the shift-and-select shaft 1 that is the transmission-side operation shaft. 4 to 7 show the main parts of the connecting mechanism portion. FIG. 4 is an operation state diagram of the connecting mechanism 18 when the output shaft 15 is operated to the protruding side, and FIG. 5 is A in FIG.
-A sectional view, FIG. 6 is an exploded view showing the connecting member, FIG.
FIG. 3 is an exploded view of the ends of the first input shaft 12 and the output shaft 15 that form the input shaft.

As described above, if the change lever 2 is operated and the connecting portion 13 is moved in the direction of the arrow as shown in FIG. 4, as described above, the first input shaft constituting the input shaft is formed. 12 and the second input shaft 17 operate in the same direction, the valve seat 28 is opened via the lifter 40, and the pressurized fluid is supplied to the pressure chamber 22 side. As a result, the output shaft 15 moves in the direction of the arrow, that is, in the same direction. It will be subject to a boosting effect that follows. As a result, the connecting mechanism 18 also tilts as shown,
The shift operation is performed by rotating the shift and select shaft 1.

The connecting mechanism 18 is, as shown in FIG.
An L-shaped connecting fitting 54 having one end fixed to the shift and select shaft 1, an inverted U-shaped connecting member 56 fixed to the connecting fitting 54 through a fixing means 55, and the connecting member 56. Fitting members 57, 5 rotatably supported by
It is composed of 8. In this case, in order to allow the shift-and-select shaft 1 to move in the axial direction in accordance with the select operation, it is rotatably connected to the connecting fitting 54 by a connecting pin 11, as shown in FIG. First done
And second connecting rods 9 and 10, or the shift and select shaft 1 and the shift member 3
It is also possible to configure and to be slidable by spline coupling or the like, and to operate the shift member 3 side so that the shift and select shaft 1 does not move in the axial direction.

As shown in FIG. 6, the fitting members 57 and 58 have the projections 59 and 60 formed on the connecting member 5 as indicated by arrows.
By being fitted from the inside into the openings 61 and 62 formed in 6, it is rotatably supported. Thereafter, the fitting vertical groove portions 63, 64 formed facing each other on both sides of the end portion of the output shaft 15 as shown in FIG. 7 while maintaining the supporting state.
The fitting members 57 and 58 are fitted to. In this case, the width Wa of the fitting members 57 and 58 and the width W of the fitting vertical groove portions 63 and 64
It is formed with a slidable fitting dimension with b.
The fitting members 57 and 58 are configured to be able to escape vertically according to the operation of 5. Further, a locking vertical groove portion 65 is also formed in the first input shaft 12 fitted into the output shaft 15, and as shown in FIG. 5, the inner portions of the fitting members 57 and 58 are engaged with each other. It is located in the stop groove portion 65. The width Wc of the locking vertical groove portion 65 is the width Wa of the fitting members 57 and 58.
It is formed to have a width larger by a predetermined amount, and is configured to secure a stroke necessary for the original boosting operation of the booster device.

However, in the normal operation, when the first input shaft 12 is operated leftward and rightward through the change lever 2, the output shaft 15 is boosted leftwardly and rightwardly as described above. The fitting members 57 and 58 are fitted in the fitting vertical grooves 63 and 6.
In order to perform the shift operation by transmitting the increased operating force to the connecting member 56 while escaping up and down along 4 and converting it into rotational movement centering on the shift and select shaft 1 via the connecting metal fitting 54. Become. In this normal operation, the locking vertical groove portion 65 does not function in particular.

Next, when the air pressure falls below a predetermined value, when the operation is suddenly performed, or when the stroke end is reached, the locking vertical groove portion 65 functions as a stopper. That is, in such a case, when the first input shaft 12 is actuated left and right via the change lever 2,
The side wall portions 65a and 65b of the locking vertical groove portion 65 function as a lock stopper, and one of the side wall portions 65a and 65b is locked to the side surface of the fitting members 57 and 58 depending on the operation direction, and thus the connecting member 56. Is pushed, a rotational force is applied to the shift and select shaft 1 through the connecting fitting 54, and a shift operation by a manual force becomes possible.

[0021]

According to the present invention, the following effects can be obtained. (1) Guidance or engagement of the fitting member required as a connecting means for connecting the connecting member fixed to the operation shaft side of the transmission and the output shaft or the input shaft of the booster device so as to be vertically movable. As the groove for stopping, a fitting vertical groove or a locking vertical groove formed directly on the output shaft and the input shaft of the booster device is adopted, so that the structure related to the groove is greatly simplified and the transmission of the operating force is performed. Results in a better transmission effect. (2) Since the support shaft does not penetrate through the output shaft and the input shaft of the booster device as in the prior art, the cross-section loss can be suppressed to a smaller extent, and the structural strength of the input shaft having a particularly small diameter is improved. it can. (3) In assembling and disassembling the connecting portion, the fitting members held in the connecting member are formed on the output shaft and the input shaft of the booster device without horizontally inserting and removing the support shaft as in the prior art. Also, since it is only necessary to insert or remove the fitting vertical groove portion and the locking vertical groove portion from above, the assembling and disassembling work is simplified and the workability thereof is improved, and the work space at the time of repair can be reduced. . (4) Compared with the prior art, since the supporting shaft is unnecessary, the number of parts can be reduced, and since it is freed from the need of incorporating a complicated sliding guide structure in the forked portion of the connecting member as in the prior art, the connection is made. It is also effective in making parts compact and reducing costs.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an entire apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view showing a main part of the embodiment.

FIG. 3 is a partially enlarged vertical sectional view in which a portion of FIG. 2 is further enlarged.

FIG. 4 is an operation state diagram showing an operation state of the coupling mechanism.

5 is a cross-sectional view taken along the line AA in FIG.

FIG. 6 is an exploded view showing a connecting member portion.

FIG. 7 is an exploded view of the ends of the input shaft and the output shaft 15.

FIG. 8 is a schematic perspective view showing a main part of a transmission operating device.

[Explanation of symbols]

1 ... Shaft for shift and select, 2 ... Change lever, 5 ... Shift fork, 6 ... Shift rod, 7 ... Booster device, 12 ... First input shaft, 13 ... Connection part, 14 ...
Booster body, 15 ... Output shaft, 16 ... Connecting pin, 17 ...
Second input shaft, 19, 20 ... Piston part, 21 ... Piston body, 22, 23 ... Pressure chamber, 24 ... Space part, 25 ... Supply port, 26, 27 ... Locking pin, 28, 29 ... Valve seat, 30 ，
31 ... Valve seat block, 32 ... Intermediate pipe, 33, 34 ...
Abutting portion, 35, 36 ... slide valve body, 37 ... spring, 38 ... communication passage, 39 ... space portion, 40, 41 ... lifter, 42 ... locking portion, 43, 44 ... spring, 45 ... flow path, 46 ... gap, 47 ... flow path, 48 ... throttle flow path, 49 ...
Accumulation chamber, 50 ... flow path, 51 ... reaction force chamber, 52
... Opening part, 53 ... Exhaust pipe, 54 ... Connecting fitting, 55 ... Fixing means, 56 ... Connecting member, 57, 58 ... Fitting member, 59,
60 ... Protrusion, 61, 62 ... Opening hole, 63, 64 ... Fitting vertical groove portion, 65 ... Locking vertical groove portion

Claims (1)

[Claims] 1. An input shaft connected to a change lever side, and a hollow output shaft concentrically arranged outside the input shaft so as to be relatively movable and connected to an operation shaft side of a transmission. A booster device for operating a transmission, which is boosted by a pressurized fluid supplied to a piston body provided on the output shaft side, in which fitting vertical groove portions are formed on both sides of a predetermined position of the output shaft, and Corresponding to the mating vertical groove portion, the input shaft is formed with a locking vertical groove portion having a groove width wider than the fitting vertical groove portion,
In addition, a fitting member is vertically movably fitted into the fitting vertical groove portion, an inner portion of the fitting member is positioned in the locking groove portion, and a connecting member for rotatably supporting the fitting member is provided. A booster device for operating a transmission, wherein the output shaft is connected to an operation shaft side of the transmission.