Device for loading and testing bending rigidity of steering column

Abstract

The utility model relates to the technical field of machinery, in particular to a bending rigidity loading test device for a steering column, which comprises a steering shaft sleeve, a holding ring, a fisheye joint, a cross beam rod, a force sensor, an adapter, a loading head and screw rods, the holding ring is sleeved and fixed outside the steering shaft sleeve, the two sides of the holding ring are respectively provided with one screw rod, and the fisheye joint is fixed on the cross beam rod. The outer end of the screw penetrates through a fisheye connector and is fixed, the bottom of the fisheye connector is fixed to a cross beam rod, a force sensor is installed in the center of the bottom of the cross beam rod, and a loading head is installed at the bottom of the force sensor. Compared with the prior art, the holding ring is used as an acquisition point and is matched with the force sensor and the external displacement measuring device, so that the bending rigidity testing requirement of the steering column is met; the connecting structure of the holding ring and the steering shaft sleeve is flexible to move and adjust, rigidity tests of various steering columns, different structures and different positions can be achieved, the test efficiency of the tool is improved, and the service life of the tool is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical technical field, concretely is a kind of for steering column bending stiffness loading test device. BACKGROUND

[0002] In the automobile steering system, steering column is used to connect steering wheel and intermediate transmission shaft, plays the role of upper and lower. Steering column is the steering system inside steering mechanism component, to transmit torque and in the process of accidental collision collapse energy absorption protects the safety of driver.

[0003] Driver rotates steering wheel or when crouching in steering wheel rest, inevitably make pipe column be stressed in horizontal direction or vertical direction. Therefore, the bending stiffness of steering column must be controlled in a certain range. In the initial stage of steering column product development, bending stiffness test needs to be carried out in laboratory to meet the product whole vehicle safety use demand.

[0004] Therefore, a steering column bending stiffness loading test device needs to be designed to meet the requirements of steering column bending stiffness test. SUMMARY

[0005] The utility model discloses a kind of for steering column bending stiffness loading test device to overcome the deficiency of prior art, to meet the requirements of steering column bending stiffness test.

[0006] To achieve the above object, the utility model is a kind of for steering column bending stiffness loading test device, including steering axle sleeve, embrace ring, fish eye joint, crossbeam rod, force sensor, adapter, loading head, screw rod, embrace ring is sleeved and fixed in steering axle sleeve outside, embrace ring's two sides are respectively installed with one screw rod, the outer end of screw rod passes through fish eye joint and is fixed, the bottom of fish eye joint is fixed with crossbeam rod, the bottom center of crossbeam rod is installed with force sensor, the bottom of force sensor is installed with loading head, crossbeam rod and force sensor between, loading head and force sensor between using adapter connection.

[0007] The steering axle sleeve is fixed between the steering axle of steering column using steering wheel locking nut.

[0008] The loading head is equipped with round hole, and the round hole is connected with force rod or speed reducer.

[0009] The inner ring of the embrace ring is provided with a thread.

[0010] The embrace ring has a notch arranged in the radial direction, and the embrace ring on both sides of the notch is connected by a fastener.

[0011] The lower end of the fish eye joint is inserted into the auxiliary sleeve.

[0012] The screw rod and the fish eye joint are fixed by a nut.

[0013] Compared with the prior art, the utility model discloses a ring is used as the collection point, cooperates force sensor and the displacement measuring device of external, satisfies the steering column bending stiffness test requirement of turning, the connecting structure of ring, steering axle sleeve, removes the flexible adjustment, can realize multiple steering column, the stiffness test of different structure, different position, improves the tooling test efficiency and service life. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the structure schematic view of the utility model.

[0015] Fig. 2 It is the front view of the utility model.

[0016] Fig. 3 It is the structure schematic view of the utility model ring.

[0017] Fig. 4 It is the structure schematic view of the utility model screw rod.

[0018] Fig. 5 It is the structure schematic view of the utility model adapter.

[0019] Fig. 6 It is the structure schematic view of the utility model loading head. DETAILED DESCRIPTION

[0020] The utility model will be further described in combination with the drawings.

[0021] See Figs. 1-6 The utility model discloses a kind of for steering column bending stiffness loading test device, including steering axle sleeve, ring, fish eye joint, cross beam rod, force sensor, adapter, loading head, screw rod, ring 1 is set and fixed in steering axle sleeve 2 outside, two sides of ring 1 are respectively installed with one screw rod 5, the outer end of screw rod 5 passes through fish eye joint 3 and is fixed, the bottom of fish eye joint 3 is fixed with cross beam rod 7, the bottom center of cross beam rod 7 is installed with force sensor 10, the bottom of force sensor 10 is installed with loading head 9, cross beam rod 7 and force sensor 10 between, loading head 9 and force sensor 10 between using adapter 8 connection.

[0022] Steering axle sleeve 2 and the steering shaft between steering column are fixed using steering wheel locking nut, loading head 9 is equipped with round hole, round hole is connected with force bar or speed reduction mechanism, to realize drive loading.

[0023] The inner ring of ring 1 is equipped with thread 11, to improve connection strength.

[0024] In order to facilitate installation, disassembly, the ring 1 has a notch arranged in the radial direction, and the ring 1 on both sides of the notch is connected by a fastener.

[0025] The lower end of the fish eye joint 3 is inserted into the auxiliary sleeve 6, and the auxiliary sleeve 6 is used to support the fish eye joint 3 and avoid interference between the ring 1 and the beam rod 7.

[0026] The screw rod 5 and the fish eye joint 3 are fixed by the nut 4 to lock the fish eye joint 3.

[0027] In the utility model, the ring 1 is used for fixing the steering shaft sleeve 2, determining a force point and a displacement collection point, the steering shaft sleeve 2 is used for adjusting the force point, and is suitable for various steering column test specifications. The fish eye joint 3 is used to realize opposite force on the steering shaft sleeve 2. The force sensor 10 is used for recording the loading force.

[0028] In the utility model, the steering column lock nut is tightened according to the loading torque, the steering shaft sleeve 2 and the steering shaft of the steering column are connected, the position of the ring 1 on the steering shaft sleeve 2 is adjusted according to the product test specification, so that the loading distance is adjusted. The force rod or the speed reduction mechanism drives loading through the loading head 9, the force sensor 10 records the change amount of the loading force, and simultaneously, the displacement change amount of the ring 1 is measured through the external displacement measuring device, and the ratio of the change amount of the loading force to the displacement change amount of the ring 1 is the column bending stiffness.

[0029] The utility model can be applied to all steering columns, including electric power steering columns, mechanical adjustment steering columns and electric adjustment steering columns. The utility model points out the direction for subsequent steering column product problem analysis and design verification.

[0030] The utility model adopts the ring as a collection point, cooperates with the force sensor and the external displacement measuring device, meets the steering column bending stiffness test requirement, the connection structure of the ring and the steering shaft sleeve is flexible in movement and adjustment, various steering columns, different structures and different positions can be tested, the tooling test efficiency and service life are improved. The utility model has the advantages of simple structure, convenient operation, firm fixation and convenient and practical use.

Claims

1. A device for steering column bending stiffness loading test, comprising a steering shaft sleeve, a clamp ring, a fish eye joint, a beam rod, a force sensor, an adapter, a loading head, a screw rod, characterized in that: The ring (1) is sleeved and fixed outside the steering shaft sleeve (2), two sides of the ring (1) are respectively provided with a screw rod (5), the outer end of the screw rod (5) penetrates through the fish eye joint (3) and is fixed, the bottom of the fish eye joint (3) is fixed with the cross beam rod (7), the bottom center of the cross beam rod (7) is provided with the force sensor (10), the bottom of the force sensor (10) is provided with the loading head (9), the cross beam rod (7) and the force sensor (10) and the loading head (9) and the force sensor (10) are connected through the adapter (8).

2. A device for steering column bending stiffness loading test according to claim 1, characterized in that: The steering shaft sleeve (2) is fixed with the steering shaft of the steering column through a steering wheel locking nut.

3. A device for testing the bending stiffness of a steering column according to claim 1, characterized in that: The loading head (9) is provided with a circular hole, and the circular hole is connected with a force adding rod or a speed reduction mechanism.

4. A device for steering column bending stiffness loading test according to claim 1, characterized in that: The inner ring of the ring (1) is provided with a thread (11).

5. A device for steering column bending stiffness loading test according to claim 1, characterized in that: The ring (1) has a notch arranged in the radial direction, and the ring (1) on both sides of the notch is connected through a fastener.

6. A device for steering column bending stiffness loading test according to claim 1, characterized in that: The lower end of the fish eye joint (3) is inserted into the auxiliary sleeve (6).

7. A device for steering column bending stiffness loading test according to claim 1, characterized in that: The screw rod (5) is fixed with the fish eye joint (3) through a nut (4).

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