RU2129493C1 - Vehicle gearshift mechanism - Google Patents

Abstract

FIELD: transport engineering. SUBSTANCE: mechanism has shifter rails with carriers, gear shifter with at least one carrier, support roller and at least one pull-back member pressed by spring to gear shifter. Axle of rotation of roller is perpendicular to gear shifter axle and is installed on housing. Guides made on pull-back member are designed for engagement with support roller by one pull-back member for engagement with at least one spring for pressing the member to gear shifter. Guides for engagement with support roller are made on pull-back member. EFFECT: simplified design, reduced force required for gearshifting. 4 dwg

Description

 The invention relates to a transport mechanical engineering and can be used in a gear shift mechanism of a car gearbox.

 A known gearshift mechanism comprising gearbox control rods with a leash, a gear lever with a leash associated with leashes on the rods, and a spring that interacts with the gear lever leash when selecting gears and ensures that the gear lever returns to neutral / 1 /.

 The disadvantage of such a gearshift mechanism is the large friction of the gearshift lever against the spring when engaging gears located on the side rods.

 A known gear shift mechanism comprising a gear selector with a leash, gearbox control rods with leashes associated with a gear selector leash, return plungers with springs located in the extreme leads of the control rods and interacting with the gear selector leash when selecting gears.

 The disadvantage of this switching mechanism is its complexity due to the need to place return plungers inside the rod leads and the relatively large friction of the extreme rods against their guides when engaging gears due to the presence of lateral force from the side of the return plungers, which leads to an increased gain in gear shifting.

 The aim of the invention is to simplify the design of the gearshift mechanism and reduce the effort of shifting gears.

 This goal is achieved in that the vehicle’s gearshift mechanism comprises a gearshift rod with leashes, a gear selector with at least one leash interacting with the rod leashes, and there is at least one support roller whose rotation axis is perpendicular to the switch axis, in addition , at least one return element can be connected to the gear selector, interacting with at least one spring pressing it against the gear selector, the axis is support of the roller can be connected to the crankcase, wherein the roller itself interacts with the guide placed on the return switch element, or it is connected with the return switch element, wherein the roller itself interacts with the guide fixedly disposed on the crankcase.

 Comparative analysis with the prototype shows that in the inventive gear shift mechanism there is at least one support roller, the axis of rotation of which is perpendicular to the axis of the switch, in addition, at least one return element interacting with at least one spring can be connected to the gear switch pressing it against the gear selector, the axis of the support roller can be connected to the crankcase, while the roller itself interacts with a guide located on the return element of the switch, and whether it is connected with the return element of the switch, while the roller itself interacts with a guide that is stationary on the crankcase.

 T. about. The claimed device is new and has an inventive step.

 The device is industrially applicable since it can be used in the transmission of vehicles, in particular in the gearbox of a Moskvich-2141 automobile.

The invention is illustrated by drawings, where:
FIG. 1 - gear shift mechanism with the axis of the support roller associated with the crankcase, a switch with two leashes, two return elements and one spring.

 FIG. 2 - gear shift mechanism with the axes of two support rollers associated with the return elements of the switch, a switch with two leashes, two return elements and one spring.

 FIG. 3 - gear shift mechanism with the axis of the support roller associated with the return element of the switch, a switch with one leash, one return element and two springs.

 FIG. 4 - gear shift mechanism of FIG. 1 after the election of the gears.

 The vehicle switching mechanism comprises gearbox control rods (1) with leads (2), (and the leads can be made as separate parts, or integral with the control rods (1)), a gear selector (3) with one (Fig. . 3) or several (Fig. 1, 2) leads (4), with which it can engage with leads of the rods (2). One (Fig. 3) or several (Fig. 1, 2) return element (5) can be installed on the gear selector, which is pressed against the switch by one (Fig. 1, 2) or several (Fig. 3) springs (6) gears (3). On the return elements (5) (Fig. 2, 3) or on the crankcase (7) (Fig. 1), the axis of one (Fig. 1, 3) or several (Fig. 2) support rollers (8), the rotation axis of which perpendicular to the axis of the switch (3), while the roller itself, when selecting gears, can interact with guides (9) placed on the crankcase (Fig. 2, 3) or on return elements (Fig. 1), and in the neutral return elements (5) pressed against the switch and do not act on the support roller (8). Return elements (5) may have stops (10).

 The operation of the device is as follows (Fig. 4).

 When the gear selector (3) is rotated around its axis with its leash (4), it can engage with the leash (2) of one of the rods (1), the gear is selected, while the gear selector (3) is connected via return elements (5) ) leans on a support roller (8). Since the return element is pressed by the spring (6) against the gear selector (3), a force arises which counteracts the election and tends to return the switch to the neutral position. When fully selected, the stops (10) of the return elements abut against the switch, thereby limiting the progress of the election. Thus, all the efforts from the selection of gears are perceived by the support roller (8), other details are unloaded from this effort. With the subsequent axial movement of the switch, the associated rod moves simultaneously and the corresponding gear is engaged. Moreover, since the axis of rotation of the support roller (8) is perpendicular to the axis of gear shifting (3), the support roller rolls without sliding in the direction (9). Since rolling friction is at least an order of magnitude less than sliding friction, the gear engagement resistance is minimal. The next time the gear is engaged, the spring (6) returns the gear selector (3) to the neutral position. If it is necessary to engage a gear that does not require election, then since the return elements (5) do not act on the support roller (8), the corresponding gear is freely engaged without loading the roller.

 The application of the alleged invention allows to simplify the design of the gearshift mechanism and reduce the gear shifting efforts, increase the bearing capacity of the synchronizer by providing surface contact in the contact of the hub and coupling splines.

Claims (1)

 A vehicle gearshift mechanism comprising gearshift rods with leashes, a gearshift with at least one leash, configured to interact with the leash rods, and a spring, characterized in that it is provided with at least one support roller, the axis of rotation of which is perpendicular the axis of the switch and mounted on the crankcase, and is equipped with at least one return element for interacting with at least one spring to press it against the gear switch, with that on the return guide member are made to interact with the anvil roll.

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