KR20090047966A - Shift detent groove - Google Patents

Abstract

The present invention relates to a shift detent groove installed in the shift control device, which is formed on the outer circumferential surface of the control finger 30 through which the control shaft 20 penetrates, and protrudes in the direction of the control shaft 20 to transmit the transmission housing 10. A detent consisting of a curved surface including a central groove 110 contacting the detent pin 50 fixedly installed at the center) and a protrusion 120 and a side groove 130 sequentially formed symmetrically with the central groove 110. In the groove 100, the section d1 between the protrusion 120 in the center groove 110 is formed in a straight line, and the outer circumferential surface d2 of the protrusion 120 is formed in a curved surface, and the protrusion 120 In the section d3 between the side grooves 130 is formed in a curved surface, by changing the pull-out force and friction force generated during the rotation of the shift lever in the same manner to improve the feeling of shifting and theft and improve the operability of the product and Increase the marketability The invention relates to shift detent groove.

Transmission, groove

Description

Shift detent groove

The present invention relates to a shift detent groove, by adjusting the bending shape of the detent groove in contact with the detent pin to adjust the pull-out force and the frictional force generated during the shift to a desired level and to change the same, The invention relates to a shift detent groove which improves the theft and increases the operability and the merchandise of a product.

The transmission is installed between the engine and the wheel to convert the driving force of the engine appropriately according to the progress of the vehicle to perform smooth and safe driving. It serves to increase or decrease and to control the connection between the engine and the driving wheels for a certain period of time during idling of the engine.

The transmission is largely divided into a manual transmission in which the driver directly operates the clutch and the transmission, and an automatic transmission in which the operation of the clutch and the transmission is automatically performed by hydraulic pressure. The automatic transmission has a complicated structure but is easy to use. The manual transmission has excellent durability and fuel efficiency.

In addition, in the selective gear type of the manual transmission according to the present invention, a perturbation gear type (Sliding-Mesh Type) which makes the perturbation gear fitted to the spline on the main shaft freely to the gear on the sub-shaft by the shift lever, Constantly meshed gear that rotates freely on the main shaft and side gear at all times, and is engaged with splines on the main shaft to shift the perturbing dog clutch with gears on the main shaft when shifting. ), And a synchro mesh type designed to compensate for the disadvantages of the perturbation gear type and the constant bite type.

In general, in a vehicle using a manual transmission, the shift lever is operated while the gear is released by operating the clutch when shifting. The traveling speed is changed by changing the gear arrangement installed in the transmission.

The general structure of a general manual transmission operating as described above will be described with reference to the accompanying drawings to find out its problems.

1 is a perspective view showing a state in which a shift lever is connected to a shift control mechanism via a shift cable in a typical manual transmission, FIG. 2 is a perspective view of a general shift control mechanism, and FIG. 3 is a shift detent groove according to the related art. Is a perspective view.

As shown in FIG. 1, the manual transmission has a shift lever 12 rotatably installed in a case 11 fixed in a vehicle compartment, and selects a shift cable 13 and a selector at a lower end of the shift lever 12. One end of the cable 14 is fixed independently, and the other ends of the shift cable 13 and the select cable 14 are independently of the shift lever 15 and the select lever 16 of the manual transmission 10, respectively. It is connected.

With this configuration, when the driver operates the shift lever 12 at the time of shifting, its operating force is transmitted to the shift lever 15 and the select lever 16 via the shift cable 13 and the select cable 14. At this time, as the shift lever 15 and the select lever 16 move, selective gearing is performed between a specific gear train among a plurality of gear trains provided in the manual transmission 10 to determine a shift stage.

In addition, the shift operation mechanism is for promoting the operation of the in-transfer synchronizing type synchro mechanism via the shift cable 13 and the select cable 14 according to the operation of the shift lever 12. In the speed manual transmission, the detent groove shown in FIGS. 2 and 3 is mounted to give a moderation feeling at the time of shifting, thereby configuring a shift operation mechanism.

Referring to FIGS. 2 and 3, in the case of a conventional seat detent groove, a control shaft 20 is formed on an outer circumferential surface of a control finger 30 through which the control shaft 20 protrudes in the direction of the control shaft 20 to transmit a transmission housing ( It consists of a curved surface including a central groove 110 in contact with the detent pin 50 fixed to the 10 and the protrusion 120 and the side groove 130 formed in a symmetrical manner with the central groove 110.

In particular, as shown in FIG. 3, the shape of a conventional detent groove has a straight line between the protrusion 120 in the center groove 110, and the outer peripheral surface d2 of the protrusion 120 is formed in a straight line. Is formed in a curved surface, the section (d3) between the side grooves 130 in the protrusion 120 is made of a curved surface formed in a straight line. In the case of using the detent groove having the above shape, the variation of the shift force in each section is shown in FIG. 5.

In the case of the detent groove 100, not only the theft feeling at the time of shifting is improved, but also the role of preventing the gear departure due to the vibration of the vehicle and the thrust train of the vehicle after the shift is completed, the zero force shown in the graph of FIG. When the force point is implemented toward the front of the entire stroke, the theft is improved, but when the zero force position is moved forward to improve the theft, the section between the protrusion 120 and the side groove 130 ( The difference between the pulling force and the finishing force of d3) becomes large.

In other words, when the difference between the pull-out force and the finish force is increased, one of the characteristics is highlighted, and a weak characteristic occurs on the other side. If the pull-out force is small, the gear may fall out. On the contrary, if the pull-off force is large, the neutral return It is difficult to make the shift feeling unstable. In addition, if the finish force is small, the gear may be pulled out. Also, if the finish force is small or large, detent grooves according to the prior art may be used due to complaints about shifting feeling such as slackness or difficulty in neutral return. In the case of use, there is a problem in that a limitation arises in adjusting the feeling of theft and adjusting the pull-out and finish forces due to the above reasons.

The present invention is to solve the above problems, by adjusting the bending shape of the detent groove in contact with the detent pin to change the pull-out force and friction force to the same to improve the feeling of shift and theft to increase the operability and productability of the product The purpose is to provide a shift detent groove.

In order to solve the above problems, the present invention is formed on the outer peripheral surface of the control finger penetrating the control shaft, protrudes in the direction of the control shaft and symmetrically with the center groove and the center groove in contact with the detent pin fixed to the transmission housing In the detent groove consisting of a curved surface including a sequentially formed protrusions and side grooves, the section between the center grooves and the protrusions is formed in a straight line, the outer peripheral surface of the protrusions is formed in a curved surface, the side grooves in the protrusion The section between is characterized in that it is formed into a curved surface.

As described above, the present invention adjusts the bending shape of the detent groove in contact with the detent pin so that the pulling force and the friction force during the shift lever operation can be changed in the same manner, thereby improving the feeling of shifting and theft during shifting, and improving the operability of the product. It is an invention that exerts an excellent effect of increasing the commerciality.

Hereinafter, the structure of the present invention will be described in detail with reference to the accompanying drawings. However, the description of the same configuration as the prior art will be omitted.

Figure 4 is a perspective view of the shift detent groove according to the present invention, Figure 5 is a graph comparing the shift force for the shift operation mechanism using the shift detent groove according to the prior art and the present invention.

As shown in FIG. 3, the present invention is formed on the outer circumferential surface of the control finger 30 through which the control shaft 20 penetrates, protrudes in the direction of the control shaft 20, and is fixed to the transmission housing 10. In the detent groove 100 made of a curved surface including a center groove 110 and the groove 120 and the side grooves 130 sequentially formed symmetrically with the center groove 110 in contact with the pin 50. The section d1 between the protrusion 120 in the central groove 110 is formed in a straight line, and the outer circumferential surface d2 of the protrusion 120 is formed in a curved surface, and the side grooves in the protrusion 120 are formed. The interval d3 between 130 may be formed in a curved surface.

In the embodiment of the present invention, unlike the prior art, it is characterized in that the protrusion (d3) between the side portion groove 130 is formed by forming a curved surface. That is, the section d1 between the protrusions 120 in the center groove 110 is formed in a straight line, and the outer circumferential surface d2 of the protrusion 120 is formed in a curved surface, which is the same as a conventional groove.

However, as described above, the section d3 between the side portion grooves 130 is curved in the protrusion portion 120, which was conventionally formed in a straight line, so that the detent pin 50 is the side portion groove in the protrusion portion 120. By forming a path in which the engagement path to 130 can smoothly engage without causing a sudden change of path, the shift force at the time of shifting can be kept constant.

Due to the shape change of the section, it is possible to solve the problem caused in the prior art by changing the pull-out force and the finish force in the same shift. That is, the zero force point can be implemented in front of the entire stroke to improve the feeling of theft, and the pulling force and the finishing force can be adjusted to a desired level. It can solve the problem of getting bigger, and it has the effect of improving the theft and stability in shifting.

In the above, certain preferred embodiments of the present invention have been shown and described. However, the present invention is not limited to the above-described embodiments, and any person having ordinary skill in the art to which the present invention pertains without departing from the spirit and spirit of the present invention claimed in the claims may make various modifications and variations. Implementation will be possible.

1 is a shift lever in a typical manual transmission using a shifting cable via a shifting cable;

A perspective view showing a state in which the instrument is connected,

2 is a perspective view of a general shift control mechanism;

3 is a perspective view of a shift detent groove according to the prior art;

4 is a perspective view of a shift detent groove according to the present invention;

5 is a shift operation using a shift detent groove according to the prior art and the present invention.

Graph comparing shift force for instruments.

Description of the main parts of the drawing

10 housing 20 control shaft

30: control finger 50: detent pin

100: detent groove 110: center groove

120: protrusion 130: side groove

Claims (1)

The control shaft is formed on the outer circumferential surface of the control finger penetrates, and includes a center groove which protrudes in the direction of the control shaft and contacts the detent pin fixed to the transmission housing, and a protrusion and a side groove sequentially formed symmetrically with the center groove. In the detent groove made of the curved surface, The section between the protrusions in the center groove is formed in a straight line, The outer circumferential surface of the protrusion is formed of a curved surface, A shift detent groove, wherein the section between the side grooves is formed in a curved surface.

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