MXPA97006849A - Displacement device for a transmission with speed change for a motor vehicle - Google Patents

Abstract

The present invention relates to a change device for a transmission of changes of speed of a motorized vehicle, characterized in that it comprises: a speed change arrow, which is fixed in a housing to change speed to be able to rotate and be axially displaceable , a shift lever that is fixed in terms of rotation in relation to the speed change shaft and that is kinematically connected to a manual shift lever, and an additional mass that acts on the change plate and increases the moment of inertia The mass of the speed change shaft is such that the peaks of the change force that can be measured in the manual shift lever are reduced during the various individual shifting operations, characterized in that the kinematic connection between the shifting lever and the shifting lever is reduced. Manual shift lever has a joint with one half of the joint assigned as part of the connection to the p change lever and with another joint half assigned as another connection part to a link leading to the manual shift lever, and because that other joint half is operatively connected to that part of the connection assigned thereto by means of a member elastic shock absorber located in the flow of the forces of change

Description

DISPLACEMENT DEVICE FOR TRANSMISSION WITH SPEED CHANGE FOR A MOTORIZED VEHICLE The present invention relates to a shifting device according to the pre-characterizing claim of claim 1 or claim 2. A speed shifting apparatus is known for motor vehicles (DE 38 39 319 C2), which corresponds to the shifting device of the type mentioned in the introduction, makes use of a cabin unit to receive the commands of displacement of a displacement lever that is pivotable around two axes perpendicular to each other, of a transmission unit, mounted above the transmission, to send the displacement commands to the transmission and of the displacement cables that connect the cabin unit to the transmission unit and transfer the displacement movement of the cabin unit to the transmission unit, selecting a slot in the displacement damper for the unit transmission during a pivoting movement of the displacement lever around a only axis and a communication movement for the contact of a displacer clutch, which is executed by the transmission unit during a pivoting movement of the displacement lever around the other axis and being coupled to a transmission unit component executing the movement displacer a moving actuator element to which the displacement movement is transferred. In order to provide a displacement or change of speed apparatus which is distinguished by a pleasant change-of-speed sensation similar to a displacement linkage, the actuator element is designed as a mass body having a mass such that due to its inertia it opposes to a considerable resistance presented to the communication movement in the initial phase of the latter and in the final phase of the latter, by virtue of its angular momentum it helps in a tangible way to the communication movement to partially compensate for the elastic behavior of the cable displacement. German publication DE 39 32 815 C2 discloses a force transfer joint for the transmission link of the transmission of a motor vehicle, and this joint consists of a cardan joint cage with a recess for the rotationally fixed mounting of a sliding block, secured therein by means of a retaining member, to receive a pin of a displacement rod, of elastomeric dampers between the sliding block and below in the directions of displacement and of an undamped assembly of the sliding block in the recess, in the selection directions. In order to avoid a selection game in the sorting direction and to make a cost-effective production possible, a design is adopted with the effect that the cardan joint cage has a rectangular recess with two parallel faces and, for the selection directions , two wedge faces to receive the correspondingly designed sliding block, an automatic adjustment retaining element for the sliding block being provided on the cage of the cardan joint. The subject of the German publication DE 195 23 141 To not previously published is a displacement device for a transmission of change of speeds of a motorized vehicle, with an arrow of displacement of speeds that is arranged in a housing of the displacement of speeds to be able rotate and be axially displaceable and having a displacement lever which is fixed in terms of rotation in relation to said speed change arrow and which is kinematically connected to a manual shift lever, and with an additional mass acting on the displacement lever and that increases the moment of inertia of the mass of the speed change shaft in such a way that force strength peaks are reduced displacer that can be measured on the manual shift lever during individual shifting operations. The additional mass is mounted separately pivotably in relation to a housing part and is connected in terms of transmission to the displacement lever. The pivot bearing shaft is located parallel to the axis of rotation of the speed change shaft. The object on which the invention is based essentially consists of a displacer device of the type mentioned in the introduction to further improve the reduction in the peaks or force crests that occurs during the displacement or shift operation. According to the invention, the object explained is advantageously achieved by means of the features in Claim 1 or Claim 2. In the displacement device of the invention according to Claim 1 or 2, both the amplitude of the force (the servo-effect of the action of the mass) and the peaks of force otherwise detectable during the change of speeds are reduced as a result of the influence of the additional mass. In addition, the force peaks generated during the change of speeds are also eliminated by means of the elastic shock absorber member or in its case the shock absorbing members. Furthermore, in the displacement or changing device of the invention according to Claim 2, the dynamic effect of the additional mass is reinforced and reliably decoupled from the selection movements of the displacement or change device. In the displacement device of the invention according to Claim 1 or 2, an optimum profile for the community of the change of the directions is achieved as a result of the additional mass and of the damping members, as can be felt in the manual displacement lever . In physical terms, the arrangement of the additional mass and the damping member on the displacement lever of the arrow of direction change means a state in which the force effect of the mass through the elasticity avoids reactions on the lever displacement (force fluctuations). In other words, the minor force fluctuations in the displacement lever that occurred during the displacement sequence can no longer be detected. This effect is also reinforced by the additional cushion member in the design of the displacement or change device according to the invention, according to Claim 3. Patent claims 4 to 6 relate to other advantageous designs of the displacement device of the invention. . The invention is described in more detail below with reference to an exemplary embodiment illustrated schematically in the drawings, in which: Figure 1 shows a perspective illustration of a part, on the transmission side, of a moving or changing device of the invention in a partially assembled state without damping members. Figure 2 shows a side view of the displacement device of Figure 1 in a more complete state by means of the displacement link that has a damping member. Figure 3 shows a part of the displacement device of the invention having the manual displacement lever, in a section that is in a vertical longitudinal plane of a housing part of the change or shift of speeds. Figure 4 shows a gasket with an elastic shock absorbing member for the kinematic connection of the manual displacement lever to a displacement link leading to the part situated on the transmission side of the switching device of Figure 2, and 5 shows a section passing through the joint of Figure 4 along the line vv. A gear shift housing part 10 is designed in the form of a closure cover with a central passage 6 for a gear change shaft 11, and with a support clamp 7 extending vertically downward in the installation position , and the speed change shaft 11 mounted on the passage 6 and on the lower end of the support bracket 7, in each case by means of an arrangement of roller bearings, to be able to rotate and be axially displaceable with respect to its axis of rotation 23-23 in relation to the housing part of the gearbox 10, that is to say in the region of the support bracket 7, a shift or displacement finger 8 having also been mounted for driving the shift rods, which is not illustrated in greater detail, and these fingers are used to drive the conventional gear couplings for the respective coupling of a loose wheel to its transmission shaft. For communication and the disengagement of the gears (geared couplings) the shift or displacement finger 8 can be operated by a displacement lever 12 which is fixedly connected to the upper end 9 of the gearshift shaft 11 and which has one half. of a joint 15 in the form of a spherical head communicating up to the corresponding spherical bushing 29 of the other half 18 of the joint 15 which is used for the articulation of a flexible change cable 17 for transferring the tensile and compressive forces to the shift lever 12. The shift cable 17 is induced by a manual shift lever 13 to execute the communication and decomposition movements according to the directional arrow 20, the shifting cable 17 being connected to the half of the joint 18, and an annular cushion member 19 which is located in the flow of the shifting forces is interposed therein. A boom 21 that at its free end supports an additional mass 14 is mounted, and supported by its weight, on a bearing 22 of the gear shift housing part 10 to be pivotable about a pivot axis 24-24 parallel to the axis of rotation 23-23. A link 32 is used for the kinematic connection of the shift lever 12 and the boom 21, with a ball joint 32 interleaved in each case. The manual shift lever 13 is connected to the shift cable 17 by means of a ball joint 25, of which a half 26 in the form of a spherical head is fixedly connected in terms of movement to the manual shift lever 13. and communicates up to the corresponding spherical bushing 30 of the other half 27 of the gasket. The manual shift lever 13 is mounted on a bearing block 33 and can be pivoted in a known manner around a first pivot axis in such a way that these pivoting movements are converted into the communication and decomposition movements 20 of the shift cable 17. The change cable 17 is connected to the half of the joint 27, and an annular elastic cushion member 28 is interleaved at this location, located within the flow of the communication and decomposition forces. The change finger 8, in order to be coupled to the respective shift rod, can be moved in longitudinal directions of the axis of rotation 23-23 by means of a selection lever 34, with double arm, which is mounted on the part of the housing of speed change 10 to pivot about a pivot axis 35-35 perpendicular to the axis of rotation 23-23. Similarly, a lever arm 36 of the selector lever 34 is connected by kinematic force to the manual shift lever 13 by means of a seal, of which only a joint pin 38 is shown, through a flexible selection cable for the transmission of tensile and compressive forces. The manual shift lever 13 is mounted on the bearing block 33 pivotably about a second pivot axis in such a way that the pivoting movements around the first pivot axis lead to the drive only of the shift cable 17 while around the second pivot axis they lead to the drive only of the selection cable, which has not been illustrated in greater detail. The second lever arm 37, in which it corresponds to the selector lever 34, is connected to the speed change shaft 11 by means of a seal arrangement 39 which converts the pivoting movements into reciprocal movements.

By virtue of this arrangement, both the additional mass 14 and the damping members 19 and 28 are put into action only on the exchange system for communication and the decomposition of the speeds, however they are completely decoupled from the selecting system to select one of the change rods (change gate slots) in each case.

Claims (6)

CLAIMS:

1. A change device for the transmission of the changes of speeds of a motorized vehicle, with an arrow of change of speeds (11), which is arranged in a housing for change of speeds (10) to be able to turn and be axially displaceable and having a shift lever (12) which is fixed in terms of rotation relative to said speed change arrow and which is kinematically connected to a manual shift lever (13), and with an additional mass (14) that acts on the shift lever (12) and increases the mass moment of inertia of the speed change shaft (11) in such a way that the peaks of the change force that can be measured on the manual shift lever are reduced (13) during the various individual shifting operations, characterized in that the kinematic connection between the shifting lever (12) and the manual shifting lever (13) has a seal (15) with one half of the joint (16) assigned to the joint. or part of the connection to the shift lever (12) and with another joint half (18) assigned as another connection part to a link (17) leading to the manual shift lever (13), and because there is another Seal half (18) is operatively connected to that link part (17) of the connection assigned thereto by means of an elastic shock absorber member (19) located in the flow of the exchange forces.

2. The change device for the transmission of the change of speeds of a motorized vehicle, with a speed change shaft (11), which is arranged in a gear change housing (10) to be rotational and move axially and having a shift lever (12), which is fixed in terms of rotation in relation to said speed change arrow and which is kinematically connected to a manual shift lever (13), and with an additional mass (14). ) acting on the shift lever (12) and increasing the moment of inertia of the mass of the gear change shaft (11) in such a way that the peaks of the change force that can be measured on the lever are reduced of manual change (13) during the different individual shift operations, and in that the additional mass (14) is mounted to the speed change shaft (11), the additional mass (14) being arranged in such a way that only transf The communication movement (20), characterized in that the additional mass (14) is arranged on a boom (21), which is mounted pivotably on a housing part (22) of the gearbox housing (10). ) at a certain distance from the axis of rotation (23-23) of the gear change shaft (11), and which is connected in terms of transmission to the shift lever (12), and the pivot support shaft ( 24-24) of the boom (21) is located parallel to the axis of rotation (23-23) of the gearshift shaft (11), and because the kinematic connection between the gearshift lever (12) and the gearshift lever manual change (13) has a gasket (15) with a first joint half (16) assigned as part of the connection to the shift lever (12) and with the other joint half (18) assigned as another part of the connection to a link (17) leading to the manual shift lever (13), and because the second joint half (18) is connected operatively connected to that part (17) of the connection assigned to it by means of an elastic shock absorber member (19) which is located in the flow of the exchange forces.

The change device according to claim 1 or 2, characterized in that the kinematic connection between the shift lever (12) and the manual shift lever (13) has a seal (25) with one half of the seal (26) assigned as part of the connection to the manual shift lever (13) and with the other half of the joint (27) assigned as another part of the connection to a link (17) leading to the shift lever (12), and in that this joint half (27) is operatively connected to that part (17) of the connection assigned thereto by means of an elastic shock absorber member (28) located in the flow of the exchange forces.

4. The change device according to any of claims 1 to 3, characterized in that a ball joint is used for the joint (15 or 25) and any half of the joint (18 or 27) that has the spherical cap (29 or 30) it is connected to the damper member (19 or 28). The change device according to any of claims 1 to 4, characterized in that a flexible cable for the transfer of the tensile and compressive forces is used for the link (17). The change device according to any of claims 1 to 5, characterized in that a link (31) is used for the connection of the transmission between the shift lever (12), fixed in terms of rotation in relation to the arrow of gear change (11) and boom (21).