Drawbar couplings Sample Clauses

The 'Drawbar couplings' clause defines the requirements and standards for the use of drawbar couplings in vehicles or equipment. It typically specifies the types of couplings permitted, their load capacities, and any necessary safety features or certifications. For example, it may require that only approved couplings are used for towing trailers or that regular inspections are conducted to ensure their integrity. The core function of this clause is to ensure safe and reliable connections between vehicles and trailers, thereby minimizing the risk of accidents or equipment failure during operation.
Drawbar couplings. The requirements of paragraphs 3.1. to 3.6. of this annex are applicable to all drawbar couplings of Class C50. Additional requirements which shall be fulfilled by standard drawbar couplings of Classes C50-1 to C50-6 are given in paragraph 3.7. of this annex. 3.1. Performance requirements - All drawbar couplings shall be able to satisfy the tests stated in Annex 6, paragraph 3.3. 3.2. Suitable drawbar eyes - Class C50 drawbar couplings shall be compatible with all Class D50 drawbar eyes and couplings with the specified characteristics. 3.3. Jaw Class C50 drawbar couplings shall have a jaw which is designed such that the appropriate drawbar eye is guided into the coupling. If the jaw, or a part supporting the jaw, can pivot about the vertical axis, it shall establish itself automatically in the normal position and with the coupling pin open, be effectively restrained in this position to give satisfactory guidance for the drawbar eye during the coupling procedure. If the jaw, or a part supporting the jaw, can pivot about the horizontal transverse axis, the joint providing the rotation capability shall be restrained in its normal position by a locking torque. The torque shall be sufficient to prevent a force of 200 N acting vertically upwards on the top of the jaw producing any deflection of the joint from its normal position. The locking torque shall be greater than that created by operation of the hand lever described in paragraph 3.6. of this annex. It shall be possible to bring the jaw to its normal position manually. A jaw that pivots about the horizontal transverse axis is only approved for bearing mass, S, of up to 50 kg and a V-value of up to 5 kN. If the jaw, or a part supporting the jaw, is pivoted about the longitudinal axis, the rotation shall be restrained by a locking torque of at least 100 Nm. The minimum required size of the jaw depends on the D value of the coupling: D value ≤ 18 kN - width 150 mm, height 100 mm D value > 18 kN ≤ 25 kN - width 280 mm, height 170 mm D value > 25 kN - width 360 mm, height 200 mm The external corners of the jaw may be radiused. Smaller jaws are permitted for Class C50-X drawbar couplings if their use is restricted to centre axle trailers up to 3.5 tonnes maximum permissible mass or if the use of a jaw from the above table is impossible due to technical reasons and if, furthermore, there are special circumstances such as visual aids for ensuring safe execution of the automatic coupling procedure and if the field ...
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Drawbar couplings. 3.3.1. Clevis-type couplings (Class c) A dynamic endurance test shall be carried out on a sample. The coupling device shall be equipped with all the fixings needed to attach it to the vehicle. 3.3.1.1. For rigid drawbar trailers Dynamic pulsating endurance test within the range for pulsating tensile stresses with resultant test force (direction of pull rearwards and down) As in paragraph 1.7. of this annex. 3.3.1.2. Clevis-type couplings on trailers Loading assumptions taking into account the D value is used. R1 and R2 as specified by the manufacturer (R2 · R1). Dynamic endurance tests as in paragraph 3.3.1.1. of this annex. 3.3.1.3. Static tests on locking device for coupling pin With clevis-type couplings with non-cylindrical pins, it is also necessary to test the closure and any locking devices by means of a static force of 0.25 · D acting in the direction of opening. A test force of 0.1 · D is sufficient in the case of cylindrical coupling pins. This force shall be raised to the above value smoothly and quickly and be maintained for 10 seconds. The test shall not cause the closure to open and it shall not cause any damage. 3.3.2. Hitch hooks (Class g) As in paragraph 3.3.1. of this annex. 3.3.3. Tractor drawbars (Class i) 3.3.3.1. Either as in paragraph 3.3.1. or a static test instead of the dynamic test as described in paragraph 3.3.
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Drawbar couplings. 3.3.1. Clevis-type couplings (Class c) A dynamic endurance test shall be carried out on a sample. The coupling device shall be equipped with all the fixings needed to attach it to the vehicle. 3.3.1.1. For rigid drawbar trailers
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Drawbar couplings. 3.3.1 Clevis-type couplings (Class c) A dynamic endurance test shall be carried out on a sample. The coupling device shall be equipped with all the fixings needed to attach it to the vehicle. 3.3.1.1 for rigid drawbar trailers. Dynamic pulsating endurance test within the range for pulsating tensile stresses with resultant test force (direction of pull rearwards and down) Fres    arctan Fs Fh Where: Horizontal load (kN): Fh = 1.0  Dc Fh = 1.0  D for full trailers Vertical load (kN) Fs = g  S + 0,3  V V = a  C  (x/l)² a = 1,8 m/s² x/l = 1,2 Special case: For articulated drawbar trailers, Fs = 0 Alternatively: Asynchronous dynamic endurance test (2-component) with test forces as defined in R55 annex 6, number 3.3 (as last amended) 3.3.1.2 Clevis-type couplings on trailers: Loading assumptions taking into account the D value D  g  R1  R2 R1  R2 is used. R1 and R2 as specified by the manufacturer (R2  R1) or Dynamic endurance tests as in 3.3.1.2. 3.3.1.3 Static tests on locking device for coupling pin With clevis-type couplings with non-cylindrical pins, it is also necessary to test the closure and any locking devices by means of a static force of 0.25 D acting in the direction of opening. A test force of 0.1 D is sufficient in the case of cylindrical coupling pins. This force shall be raised to the above value smoothly and quickly and be maintained for 10 seconds. The test shall not cause the closure to open and it shall not cause any damage. 3.3.2 Hitch hooks (Class g) As in 3.1.3 of this annex. 3.3.3 Tractor drawbars (Class i) 3.3.3.1 Either as in 3.1.3 of this annex or a static test instead of the dynamic test as described in 3.1.3 if the drawbar is intended to be mounted to agricultural vehicles with a maximum design speed not exceeding 40 km/h. 3.3.3.2 Static Test Method
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Drawbar couplings. 3.3.1. Clevis-type couplings (Class c) A dynamic endurance test shall be carried out on a sample. The coupling device shall be equipped with all the fixings needed to attach it to the vehicle. 3.3.1.1. For rigid drawbar trailers Dynamic pulsating endurance test within the range for pulsating tensile stresses with resultant test force (direction of pull rearwards and down) As in 1.7. 3.3.1.2. Clevis-type couplings on trailers Loading assumptions taking into account the D value is used. R1 and R2 as specified by the manufacturer (R2 · R1). Dynamic endurance tests as in 3.3.1.1. 3.3.1.3. Static tests on locking device for coupling pin With clevis-type couplings with non-cylindrical pins, it is also necessary to test the closure and any locking devices by means of a static force of 0.25 · D acting in the direction of opening. A test force of 0.1 · D is sufficient in the case of cylindrical coupling pins. This force shall be raised to the above value smoothly and quickly and be maintained for 10 seconds. The test shall not cause the closure to open and it shall not cause any damage. 3.3.2. Hitch hooks (Class g) As in 3.3.1. 3.3.3. Tractor drawbars (Class i) 3.3.3.1. Either as in 3.3.1. or a static test instead of the dynamic test as described in 3.3.
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Drawbar couplings. 3.3.1. Clevis-type couplings (Class c) A dynamic endurance test shall be carried out on a sample. The coupling device shall be equipped with all the fixings needed to attach it to the vehicle. 3.3.1.1. For rigid drawbar trailers Dynamic pulsating endurance test within the range for pulsating tensile stresses with resultant test force (direction of pull rearwards and down) As in 1.7. 3.3.1.2. Clevis-type couplings on trailers Loading assumptions taking into account the D value is used. R1 and R2 as specified by the manufacturer (R2 · R1) or dynamic endurance tests as in 3.3.1.2. 3.3.1.3. Static tests on locking device for coupling pin With clevis-type couplings with non-cylindrical pins, it is also necessary to test the closure and any locking devices by means of a static force of 0.25 · D acting in the direction of opening. A test force of 0.1 · D is sufficient in the case of cylindrical coupling pins. This force shall be raised to the above value smoothly and quickly and be maintained for 10 seconds. The test shall not cause the closure to open and it shall not cause any damage. 3.3.2. Hitch hooks (Class g) As in 3.1.3 of this annex. 3.3.3. Tractor drawbars (Class i) 3.3.3.1. Either as in 3.1.3 of this annex or a static test instead of the dynamic test as described in 3.1.3 if the drawbar is intended to be mounted to agricultural vehicles with a maximum design speed not exceeding 40 km/h. 3.3.3.2. Static Test Method 3.3.3.2.1. Test specifications
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