Installation for engaging a reverse speed gear wheel in motor vehiclechange speed transmissions

Claim 2

An installation for meshingly engaging a reverse-speed gear wheel of a change-speed transmission, which includes a reversing gear wheel for the reverse speed constructed as sliding gear wheel adapted to be meshingly engaged with gear wheels on a counter shaft and on a main shaft by means of a shifting element, characterized in that the gear wheel on the counter shaft is wider in the direction toward the sliding gear wheel than the gear wheel on the main shaft, and in that a brake means constructed in the manner of a blocking synchronization means and cooperating with a fixed part of the transmission is operatively coordinated to said sliding gear wheel for effecting synchronization of the shifting into the reverse speed.

Claim 3

An installation according to claim 1, characterized in that the sliding gear wheel includes a synchronizing cone means on the side facing the other gear wheels, and in that a counter-cone means is supported in a rotatably limited and axially displaceable manner on the sliding gear wheel shaft, and in that this counter-cone means is adapted to be yieldingly engaged against the synchronizing cone means.

Claim 4

An installation according to claim 2, characterized in that the sliding gear wheel carries a synchronizing cone means.

Claim 5

An installation according to claim 2, characterized in that the sliding gear wheel forms said synchronizing cone means.

Claim 6

An installation according to claim 2, characterized in that the axial displacement path of the sliding gear wheel is so limited that guide means at the counter-cone means do not come out of engage-ment with complementary means.

Claim 7

An installation for meshingly engaging a reverse-speed gear wheel of a change-speed transmission, which includes a reversing gear wheel for the reverse speed constructed as sliding gear wheel adapted to be meshingly engaged with gear wheels on a counter shaft and on a main shaft by means of a shifting element, characterized in that the gear wheel on the counter shaft is wider in the direction toward the sliding gear wheel than the gear wheel on the main shaft, in that a brake means constructed in the manner of a blocking synchronization means and cooperating with a fixed part of the transmission is operatively coordinated to said sliding gear wheel, in that the sliding gear wheel includes a synchronizing cone means on the side facing the other gear wheels, in that a counter-cone means is supported in a rotatably limited and axially displaceable manner on the sliding gear wheel shaft, and in that this counter-cone means is adapted to be yieldingly engaged against the synchronizing cone means, in that the counter-cone means is fixed on a spectacle-like disk means and in that two substantially axially parallel bolts are secured in said disk means and are directed toward a housing wall, said bolt means engaging with the ends thereof in corresponding housing aperture means with due consideration to the predetermined circumferential movability determined by the limited rotatability.

Claim 8

An installation for meshingly engaging a reverse-speed gear wheel of a change-speed transmission, which includes a reversing gear wheel for the reverse speed constructed as sliding gear wheel adapted to be meshingly engaged with gear wheels on a counter shaft and on a main shaft by means of a shifting element, characterized in that the gear wheel on the counter shaft is wider in the direction toward the sliding gear wheel than the gear wheel on the main shaft, in that a brake means constructed in the manner of a blocking synchronization means and cooperating with a fixed part of the transmission is operatively coordinated to said sliding gear wheel, in that the sliding gear wheel includes a synchronizing cone means on the side facing the other gear wheels, in that a counter-cone means is supported in a rotatably limited and axially displaceable manner on the sliding gear wheel shaft, and in that this counter-cone means is adapted to be yieldingly engaged against the synchronizing cone means, in that the counter-cone means is fixed on a spectacle-like disk means and in that two substantially axially parallel bolts are secured in said disk means and are directed toward a housing wall, said bolt means engaging with the ends thereof in corresponding housing aperture means with due consideration to the predetermined circumferential movability determined by the limited rotatability.

Claim 9

An installation according to claim 6, characterized in that said disk means is secured on said counter-cone means.

Claim 10

An installation according to claim 6, characterized in that said disk means is formed by said counter-cone means itself.

Claim 11

An installation according to claim 6, characterized in that said housing aperture means are provided at least at the portions thereof disposed in the circumferential direction with inclined blocking surface means that cooperate with correspondingly inclined counter-surface means at the bolts.

Claim 12

An installation according to claim 9, characterized in that each bolt, starting from the disk means, includes a cylindrical portion intended for the engagement, adjoined by a conical portion effective as counter-surface means, and in turn adjoined at the end thereof by a cylindrical portion effective as guide means.

Claim 13

An installation according to claim 10, characterized in that the axial displacement path of the sliding gear whEel is so limited that guide means at the counter-cone means do not come out of engagement with complementary means.

Claim 14

An installation according to claim 11, characterized in that the guide means are provided at the bolts and the complementary means are formed by the aperture means.

Claim 15

An installation for meshingly engaging a reverse speed gear wheel of a change-speed transmission, which includes a reversing gear wheel for the reverse speed constructed as sliding gear wheel adapted to be meshingly engaged with gear wheels on a counter shaft and on a main shaft by means of a shifting element, characterized in that the gear wheel on the counter shaft is wider in the direction toward the sliding gear wheel than the gear wheel on the main shaft, in that a brake means constructed in the manner of a blocking synchronization means and cooperating with a fixed part of the transmission is operatively coordinated to said sliding gear wheel, in that the sliding gear wheel includes a synchronizing cone means on the side facing the other gear wheels, in that a counter-cone means is supported in a rotatably limited and axially displaceable manner on the sliding gear wheel shaft, and in that this counter-cone means is adapted to be yielding engaged against the synchronizing cone means, in that the counter-cone means is supported with a hub portion on the sliding gear wheel shaft, and in that the hub portion is provided with longitudinal slots open towards its end, into which engage stationary cross pins.

Claim 16

An installation for meshingly engaging a reverse speed gear wheel of a change-speed transmission, which includes a reversing gear wheel for the reverse speed constructed as sliding gear wheel adapted to be meshingly engaged with gear wheels on a counter shaft and on a main shaft by means of a shifting element, characterized in that the gear wheel on the counter shaft is wider in the direction toward the sliding gear wheel than the gear wheel on the main shaft, in that a brake means constructed in the manner of a blocking synchronization means and cooperating with a fixed part of the transmission is operatively coordinated to said sliding gear wheel, in that the sliding gear wheel includes a synchronizing cone means on the side facing the other gear wheels, in that a counter-cone means is supported in a rotatably limited and axially displaceable manner on the sliding gear wheel shaft, and in that this counter-cone means is adapted to be yielding engaged against the synchronizing cone means, in that the counter-cone means is supported with a hub portion on the sliding gear wheel shaft, and in that the hub portion is provided with longitudinal slots open towards its end, into which engage stationary cross pins.

Claim 17

An installation according to claim 13, characterized in that each slot is provided at its mouth with a guide portion enlarged corresponding to the predetermined circumferential play which is adjoined by the inclined counter-surface means and in turn is followed by a narrower portion for the engagement.

Claim 18

An installation according to claim 14, characterized in that the axial displacement path of the sliding gear wheel is so limited that guide means at the counter-cone means do not come out of engagement with complementary means.

Claim 19

An installation according to claim 15, characterized in that guide means are formed in the longitudinal slots and the complementary means are formed by the cross pins.