KR200159151Y1 - Erroneous feverse shifting preventing device for manual transmission - Google Patents

Abstract

The present invention relates to a reverse malfunction prevention device of a manual transmission. According to the present invention, the reverse misoperation preventing device of the manual transmission is rotatably and axially supported on the housing 10 and the housing 10, and is fixed to protrude at least one side through orthogonal to the axis center. A shift shaft 40 having a pin 44; A stopper 86 fixed on the housing 10 so as to cross the center of the shift shaft 40; The operating shaft 102 is inserted into the transmission shaft 40 to enable movement and rotation in the axial direction, and restricts movement and rotation in the axial direction at a predetermined position by interfering with the stop pin 44. And, the outer circumferential surface protruding outwardly in the radial direction, the operation cam 100 is formed integrally with the engaging projection 104 to interfere with the stopper 86; A compression spring 110 is provided between the fixture 46 fixed to the transmission shaft 40 and the actuating cam 100 to elastically press the actuating cam 100 in a predetermined direction. The present invention made of such a configuration does not require a separate working groove processing process does not require a processing cost and the cost of heat treatment by processing, reducing the manufacturing cost, there is an effect of increasing the strength of the transmission shaft.

Description

Reverse operation prevention device of manual transmission

The present invention relates to an automobile, and more particularly, to a reverse misoperation preventing device of a manual transmission.

As is well known, automobiles use an internal combustion engine that burns fuel in an engine and converts thermal energy generated therein into kinetic energy, and is used as a means of transporting cargo and people.

Such automobiles include a transmission for appropriately controlling the driving force of the engine and transmitting it to the axle (drive wheel). Since the transmission does not have sufficient maneuvering power at the initial driving of the engine, it reduces the rotational force of the engine at the initial driving to increase the driving torque, or converts or increases the reduction ratio when the speed increases to operate according to the driving condition of the vehicle. . Many types of such transmissions have been developed, such as manual transmissions and automatic transmissions. The manual transmission requires the operation of the mechanical friction clutch to block or connect the driving force of the engine, and the driver must shift the gear from time to time according to the driving conditions. In addition, the automatic transmission is mechanically or electronically automated according to the load state of the engine and the vehicle speed, so that the gear shifting operation is performed only by the operation of the accelerator pedal. In addition to this, a so-called continuously variable transmission has been developed that removes a shift stage so that there is no shift shock.

On the other hand, the manual transmission is driven by a clutch, the drive shaft is a plurality of drive gears are fixed on the shaft, and the driven shaft is arranged in parallel with the drive shaft and the plurality of driven gears are selectively engaged with the drive gear on the shaft is fixed It transmits power to the differential gear device connected to the axle through the longitudinal reduction gear connected to the end of the driven shaft. Each of the drive gears is combined into one stage and two stages, three stages and four stages, five stages, and R stages.

In addition, the first and second gear rods three-stage and four-speed rods arranged in parallel with the drive shaft and the driven shaft, each having a shift fork for one-stage, two-stage, three-stage and four-stage, five-stage and R stage, respectively. , 5-speed and R-speed shift rods are provided, and linear movement and rotation are performed according to the shift lever operation, and shifting is performed by manipulating 1- and 2-speed shiftforks, 3- and 4-speed shiftforks, 5-din and R-speed shiftforks. It is equipped with a shift control mechanism.

At this time, since the 5th position and the reverse position are paired in the shifting operation, if the gear shifts directly to the reverse position at the 5th gear during shifting, a large shock occurs in the reverse gear, which causes damage to the reverse gear and of course the effects of rapid brakes. It may cause a large traffic accident such as vehicle overturning. Therefore, the manual transmission requires reverse misoperation, which limits the shift from the fifth gear to the reverse position as described above.

Figure 1 shows a conventional shift control mechanism having such a reverse misoperation preventing device. Looking at this, the transmission shaft 40 is installed in the housing 10 to be rotatable and linear reciprocating movement is installed. The shift shaft 40 extends to both sides of the housing 10, and on one side thereof, a select driving lever 20 for linearly moving the shift shaft 40 in a selected direction by a select operation of a shift lever (not shown) is provided. The shift driving lever 30 which rotates the transmission shaft 40 in the selected direction by the shift operation of the shift lever is connected. Each select driving lever 20 and the shift driving lever 30 are connected to the shift lever by a cable.

A shift finger 50 is fixed to the other end of the shift shaft 40 to drive a shift fork (not shown) selected during operation of the shift shaft 40. In addition, a pair of springs 60 and 62 are provided on both sides of the shift finger 50 so that the transmission shaft 40 always maintains its neutral position. The shift finger 50 has a leg 52 interlocking with the shift fork in a direction orthogonal to the shaft, and on the opposite side thereof, a restriction groove for interfering with the fixing bolt 70 screwed onto the housing 10. 54) is formed.

On the other hand, the stopper 86 is fixed in the housing 10, and the operation cam 80 that interferes with the stopper 86 is installed on the transmission shaft 40 to rotate and axially together with the transmission shaft 40. It is possible to move.

According to Figure 2, the operation cam 80 is elastically supported by the spring 84, the engaging projection 81 is interfered with the stopper 86 on one side is integrally configured. The actuating cam 80 is allowed to move in the axial direction and to rotate at a predetermined angle by the pins 82 fixed through the actuating grooves 42 formed on the transmission shaft 40.

The conventional shift control mechanism has a locking protrusion 81 of the operation cam 80 as shown in FIG. 3B when the shift shaft 40 is selected in five and R stages in a neutral position as shown in FIG. 3A. The movement is restricted by the stopper 86 so that the spring 84 is compressed and only the shift shaft 40 moves, and the shift finger 50 fixed to the shift shaft 40 moves together in the axial direction. do.

In this state, as shown in FIG. 3C, when the shift shaft 40 is shifted to the fifth position, the operation cam 80 rotates according to the rotation of the shift shaft 40, and the shift finger 50 is rotated. Entering 5th stage. At this time, the locking projection 81 is returned by the elastic restoring force of the spring 84 at the point away from the stopper 86.

On the other hand, when returning to the neutral position in the five-stage state as described above, if the shift shaft 40 is rotated in the reverse direction, the locking projection 81 of the operation cam 80 is interfered by the stopper 86, the shift shaft Allow the rotation of 40 by a certain angle. At this time, the rotation allowable angle is allowed only up to the position where the transmission shaft 40 reaches the neutral line. That is, the operation cam 80 is the rotation of the pin 82 is limited by the interference with the operation groove 42 on the transmission shaft (40). In this state, the transmission shaft 40 can move to the neutral position. Therefore, since the shift shaft 40 does not enter the reverse position, a direct shift from the fifth position to the reverse position is impossible.

However, in the conventional reverse misoperation preventing device having the above configuration, since the operating groove 42 is formed on the shifting shaft 40, it is necessary to reinforce the processing cost of the operating groove 42 and the strength of the operating groove 42. The manufacturing cost is increased due to the heat treatment cost, there was a problem that the strength of the shift shaft is reduced due to the operation groove (42).

Therefore, the present invention has been devised to solve the above problems, the purpose is that by removing the operating groove from the transmission shaft does not cost the processing cost and heat treatment cost of the operating groove 42, the manufacturing cost is reduced, increasing the strength of the transmission shaft A reverse transmission preventing device of a manual transmission is provided.

1 is a cross-sectional view of a shift control mechanism provided with a reverse malfunction preventing device of a conventional manual transmission;

Figure 2 is a perspective view showing the configuration of a reverse malfunction control device of a conventional manual transmission;

3a, 3b, 3c is an operating state diagram showing the operation of the conventional reverse malfunction prevention device,

Figure 4 is a cross-sectional view of the shift control mechanism is installed reverse reverse operation prevention device of the manual transmission according to the present invention,

5 is a cross-sectional view taken along the line A-A of FIG.

Figure 6 is a perspective view showing the configuration of the reverse operation operation prevention device of the manual transmission according to the present invention,

7a, 7b, 7c is an operating state diagram showing the operation of the reverse operation prevention device according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

10: housing 40: transmission shaft

44: stop pin 46: fixture

86: stopper 100: working cam

102: operating groove 104: locking projection

110: compression spring

An object of the present invention as described above is a transmission shaft having a housing, a stop pin that is rotatably and axially movable on the housing and penetrates perpendicular to the axis center and is fixed to protrude at least one side thereof; A stopper fixed on the housing so as to cross the center of the shift shaft; The shift shaft is fitted to allow movement and rotation in the axial direction, and an operating groove is formed to restrict movement and rotation in the axial direction at a predetermined position by interfering with the stop pin. An actuating cam that protrudes to integrally form an engaging protrusion interfering with the stopper; It can be achieved by a compression spring which is provided between the fixture fixed on the shift shaft and the actuating cam to elastically press the actuating cam in a predetermined direction.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the reverse operation prevention device of the manual transmission according to the present invention is as follows (the same components will be described using the same reference numerals).

Figure 4 is a cross-sectional view of the shift operation mechanism is applied reverse reverse operation prevention device of the manual transmission according to the present invention. Accordingly, the housing 10 is provided with a shift shaft 40 supported by the housing 10 and capable of rotating and reciprocating linearly, and a stopper 86 in the housing 10 so as to cross the center of the shift shaft 40. It is fixed. A stop pin 44 is fixed to the transmission shaft 40 so as to penetrate perpendicularly to the shaft center and protrude on both sides thereof. In addition, as shown in FIGS. 5 and 6, the operation cam 100 is fitted to the shift shaft 40 to be rotatable and rotatable in the axial direction. The operating groove 102 is formed on both sides of the operation cam 100 so that the stop pin 44 of the shifting shaft 40 is inserted, and an outer projection surface protrudes outward in a radial direction to interfere with the stopper 86. 104 is integrally formed. The operation groove 102 is formed in a predetermined depth in the axial direction from one side to allow the axial movement of the shifting shaft 40, the width thereof is larger than the stop pin 44 to limit the rotation of the shifting shaft 40 Allowed. 4, the fixture 46 is installed on the transmission shaft 40, and the compression spring 110 is installed between the fixture 46 and the operation cam 100. One end of the compression spring 110 is supported by the fixture 46 and the other end is supported by the actuating cam 100 to elastically support the actuating cam 100 in one direction and simultaneously actuate the actuating cam 100 to the stop pin 44. Always close In addition, the shift shaft 40 extends to both sides of the housing 10, and on one side thereof, a select driving lever 20 for linearly moving the shift shaft 40 in a selected direction by a select operation of a shift lever (not shown). Is connected, and a shift drive lever 30 for rotating the shift shaft 40 in the selected direction by the shift operation of the shift lever is connected. Each select driving lever 20 and the shift driving lever 30 are connected to the shift lever by a cable.

A shift finger 50 is fixed to the other end of the shift shaft 40 to drive a shift fork (not shown) selected during operation of the shift shaft 40. In addition, both sides of the shift finger 50 are provided with a pair of springs 52 and 54 to keep the shift shaft 40 in a neutral position at all times. The shift finger 50 has a leg 52 interlocking with the shift fork in a direction orthogonal to the shaft, and on the opposite side thereof, a restriction groove for interfering with the fixing bolt 70 screwed onto the housing 10. 54) is formed.

According to the present invention having the configuration as shown in FIG. 7A, when the shift shaft 40 is selected at the fifth and the R stages in the neutral position, the locking protrusion 104 of the operation cam 100 is illustrated as shown in FIG. 7B. ) Is restricted by the stopper 86 so that the compression spring 110 is compressed and only the shift shaft 40 moves. At this time, the stop pin 44 is moved to the outside of the operating groove (102). In addition, the shift fingers 50 fixed to the shift shaft 40 move together in the axial direction.

In this state, as shown in FIG. 7C, when the shift shaft 40 is shifted to the fifth position, the operation cam 100 rotates according to the rotation of the shift shaft 40, and the shift finger 50 is rotated. Entering 5th stage. At this time, at the point away from the stopper 86, the locking projection 104 is returned by the elastic restoring force of the compression spring 110.

On the other hand, when returning to the neutral position in the five-stage state as described above, if the shift shaft 40 is rotated in the reverse direction, the locking projection 104 of the operation cam 100 is interfered by the stopper 86, the shift shaft Allow the rotation of 40 by a certain angle. At this time, the rotation allowable angle is allowed only up to the position where the transmission shaft 40 reaches the neutral line. That is, the operation cam 100 is the rotation of the stop pin 44 is limited by the interference with the operation groove 42 of the operation cam 100. In this state, the transmission shaft 40 can move to the neutral position. Therefore, since the shift shaft 40 does not enter the reverse position, a direct shift from the fifth position to the reverse position is impossible.

As described above, the reverse misoperation preventing device of the manual transmission according to the present invention is provided with a stop pin installed on the shifting shaft, and an operation groove restricting movement and rotation in the axial direction at a predetermined position by interfering with the stop pin. By installing integrally to the operation cam, there is no need for a separate working groove processing process, the processing cost and the heat treatment cost by processing is reduced, the manufacturing cost is reduced, it is effective to increase the strength of the transmission shaft.

Claims (3)

The housing 10, A transmission shaft 40 rotatably and axially supported by the housing 10 and having a stop pin 44 penetrating orthogonally to the center of the shaft to protrude at least one side thereof; A stopper 86 fixed on the housing 10 so as to cross the center of the shift shaft 40; An operating groove 102 is inserted into the shift shaft 40 to enable movement and rotation in the axial direction, and is restricted from a predetermined position in the axial direction by the interference with the stop pin 44. And, the outer circumferential surface protruding outwardly in the radial direction, the operation cam 100 is formed integrally with the engaging projection 104 to interfere with the stopper 86; A reverse transmission operation preventing device of a manual transmission comprising a compression spring 110 provided between a fixture 46 fixed to a transmission shaft 40 and an operation cam 100 to elastically press the operation cam 100 in a predetermined direction. . The method of claim 1, wherein the operation groove 102 is formed in a predetermined depth in the axial direction from any one side to allow the shift in the axial direction of the shift shaft, the width is limited to the rotation of the shift shaft by making it larger than the stop pin Reverse operating prevention device of manual transmission characterized by permissible According to claim 2, wherein the stop pin 44 is protruded to both sides through the transmission shaft 40, the operation groove 102 is both sides of the operation cam 100 so that the stop pin 44 can be inserted The reverse transmission prevention device of a manual transmission, characterized in that formed on.