Abrégé

A method for producing steel comprises smelting process and heat treatment process. The heat treatment process comprises pre-heat treatment and quenching-and-tempering heat treatment. The pre-heat treatment comprises normalizing treatment, and the quenching-and-tempering heat treatment comprises quenching treatment and tempering treatment. The component of steel produced by the method described above comprises(by wt%): C:0.24-0.32％; Si:0.20-0.50％; Mn:1.30-1.70％; P:≤0.02％; S:≤0.02％; Cu≤0.30％; Cr:0.50-0.80％; Ni:0.40-0.70％; Mo:0.25-0.45％; Al:0.02-0.08％; balanced Fe and other unavoidable elements. Thereby, steel with high strength and high toughness is obtained.

Classes IPC  ?

• C22C 38/58 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse
• C22C 38/44 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du molybdène ou du tungstène
• C21D 1/28 - Normalisation
• C21D 1/25 - Durcissement combiné à un recuit entre 300 °C et 600 °C, c.-à-d. affinage à chaud dit "Vergüten"

Abrégé

The invention discloses a steel and a train hook made therefrom. The steel composition comprises, in wt%, C: 0.24%-0.32%; Si: 0.20%-0.50%, Mn: 1.30%-1.70%, P≤0.020%, S≤0.020%, Cu≤0.30%, Cr: 0.50%-0.80%, Ni: 0.40%-0.70%, MO: 0.25%-0.45%, Al: 0.02%-0.08%, and the balance Fe and inevitable impurities. The invention provides the steel having high strength and excellent toughness. The steel mechanical properties are better than the mechanical properties of Grade E Steel.

Classes IPC  ?

• C22C 38/44 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du molybdène ou du tungstène

Abrégé

A lower locking pin body (1) for the hinge joint between a lower locking pin (5) and a lower locking pin hook (6) has a suspending hole (11,12) of a coupler lock lifter (20) to facilitate it rotating surrounding the lower locking pin hook (6) under the effect of the hole. There are two coupler suspending holes (11,12) which are respectively arranged on each side ends of the lower locking pin body (1) to facilitate the workers opening the coupler on either side of a car. A two-side operating coupler (10) with above said lower lock pin body (1) and a draft gear are provided, wherein the draft gear also includes two lock lifters (20) and two lock lifter seats (30).The lock lifters (20) are mounted into a key-shaped hole (31) of the lock lifter seats (30), and the lock lifter (20) has a limiting segment (21) on the matched position. Two hook head ends of the lock lifters (20) pass respectively out from the key-shaped holes（31） of the coupler lock lifter seats (30) and hang with the coupler lock lifter (20) suspension hole (11,12) of the two-side operating coupler. It has clearance between the limiting segment (21) of the coupler lock lifter (20) and a stripe-shaped hole wall of the key-shaped hole (31).

Classes IPC  ?

• B61G 3/08 - Dispositifs de commande, p. ex. pour dételer
• B61G 3/10 - Couplage comprenant des éléments d'accouplement de forme ou de conformation similaire pouvant s'accoupler sans utiliser aucun élément ou éléments additionnels avec des têtes d'attelage en forme de mâchoires rigides s'engageant les unes dans les autres comme des crochets, p. ex. du type "Willison"
• B61G 7/14 - Dispositifs de sécurité

Abrégé

A draft gear yoke of a draft gear for a railway freight car includes a draft gear yoke body (1) and a draft key retainer (3).The head of the draft gear yoke body (1) has a draft key hole for installing a draft key that is connected with the coupler. A draft key retainer (3) for supporting the draft key is installed underneath the head of the draft gear yoke body (1). The shape of the upper surface of a supporting part of the draft key retainer (3) corresponds with a lower surface of the draft key to form surface-contact between the two surfaces. It strengthens safety and reliability of the draft gear yoke.

Classes IPC  ?

• B61G 9/00 - Organes de traction
• B61G 9/20 - Organes de traction Parties constitutivesAccessoires
• B61G 9/22 - Châssis de support, p. ex. berceauxLogements des ressorts

Abrégé

A mechanism for preventing tripping of a coupler includes a lower locking pin rod (1), a coupler body (5) and a rotating shaft (2). The rotating shaft (2) is located in a strip-shaped mounting hole (11) of a lower locking pin rod (1) and a round mounting hole of a coupler body (5) in order to realize hinge joint between the lower locking pin rod (1) and the coupler body (5); An upper surface of a rotating shaft (2) has an axial boss (21), a hole wall of the coupler body (5) above the rotating shaft (2) is arranged with an axial recess (53) which receives the axial boss (21); The rotating shaft (2) can move axially relative to the lower locking pin rod (1) and the coupler body (5),and it has two working positions. When the rotating shaft (2) moves to the first working position, an inner end of the boss (21) is located into the strip-shaped mounting hole (11) of  the lower locking pin rod (1), an upper wall of the strip-shaped mounting hole (11)contacts against the boss (21), the lower locking pin rod (1) is rotated in the coupler opening direction, a tripping preventing table (12) of the lower locking pin rod (1) can contact against a tripping preventing surface (52) of the coupler body (5). When the rotating shaft (2) moves to the second working position, the boss (21) is located into the mounting hole’s recess (53) of the coupler body (5), the upper wall of the strip-shaped mounting hole (11) contacts against an outer peripheral surface of the rotating shaft (2).The invention also includes a car body coupler with the mechanism for preventing tripping of a coupler The invention realizes reliable dual performance of preventing the coupler from opening a lock.

Classes IPC  ?

• B61G 3/04 - Couplage comprenant des éléments d'accouplement de forme ou de conformation similaire pouvant s'accoupler sans utiliser aucun élément ou éléments additionnels avec une tête d'attelage comportant un bras de garde sur un côté et une articulation avec des parties "nez" et "queue" disposées angulairement, articulées vers l'autre côté du bras, le "nez" de l'articulation étant la partie attelante, et ayant des dispositifs de verrouillage de l'articulation en position d'attelage, p. ex. du type "A.A.R." (A.A.R. = Association of American Railroads) ou "Janney"
• B61G 7/14 - Dispositifs de sécurité

Abrégé

A lower lockpin rotating shaft assembly comprises a lower lockpin rotating shaft body with a first coupler lifting rod suspending hole at the outer side end and a connecting key in the middle portion, further comprises a lower lockpin rotating shaft sleeve with a second coupler lifting rod suspending hole at the outer side end, and the inner side end thereof is in fit connection with the inner side end of the lower lockpin rotating shaft body. A double-side action coupler and a coupler-buffering device comprising the lower lockpin rotating shaft assembly aforementioned are also provided. The coupler-buffering device also comprises two coupler lifting rods (20) and two coupler lifting rod seats (30), the coupler lifting rod (20) crosses a keyhole-shaped through hole of the coupler lifting rod seat (30) and is fixed in the same, and the coupler lifting rod (20) comprises a limiting segment (21) in conjunct position. The coupler head end of two coupler lifting rods (20) are hanged by the first coupler lifting rod suspending hole and the second coupler lifting rod suspending hole of the double-side action coupler after crossing the keyhole-shaped through hole of two coupler lifting rod seats (30) respectively. There is a gap between the limiting segment (21) of the coupler lifting rod and the bar-shaped hole wall of the keyhole-shaped through hole.

Classes IPC  ?

• B61G 3/08 - Dispositifs de commande, p. ex. pour dételer
• B61G 7/00 - Parties constitutives ou accessoires
• B61G 9/20 - Organes de traction Parties constitutivesAccessoires

Abrégé

A coupler includes a coupler head, a coupler shank and a coupler tail. The middle part of the coupler tail face is a cylindrical surface whose two sides are symmetrically arranged with protruding shoulders. Carrying surface middle part of the carrier body of a complementary draft follower is a cylindrical surface; two sides of the cylindrical surface are arranged symmetrically with protruding shoulders. A coupler draft gear includes a draft gear yoke, a draft key and the draft follower. The structure can strengthen the automatic alignment of the coupler.

Classes IPC  ?

• B61G 3/04 - Couplage comprenant des éléments d'accouplement de forme ou de conformation similaire pouvant s'accoupler sans utiliser aucun élément ou éléments additionnels avec une tête d'attelage comportant un bras de garde sur un côté et une articulation avec des parties "nez" et "queue" disposées angulairement, articulées vers l'autre côté du bras, le "nez" de l'articulation étant la partie attelante, et ayant des dispositifs de verrouillage de l'articulation en position d'attelage, p. ex. du type "A.A.R." (A.A.R. = Association of American Railroads) ou "Janney"
• B61G 3/06 - Dispositifs de verrouillage de l'articulation