Multifunctional testing tool for steering gear shell

Abstract

The utility model relates to the technical field of steering systems, in particular to a multifunctional testing tool for a steering engine shell. A multifunctional testing tool for a steering engine shell comprises a long shell clamping tool and a servo shell profiling tool, and is characterized in that the servo shell profiling tool is arranged on one side of the long shell clamping tool; the long shell clamping tool comprises a supporting base, a supporting guide rail and a long shell adjustable clamping jaw, the supporting base is connected with one end of the supporting guide rail, and the other end of the supporting guide rail is connected with the long shell adjustable clamping jaw; the servo shell profiling tool comprises a base, a profiling tool body, ejector rods and clamping jaws, the profiling tool body is arranged on the base, the ejector rods are connected to the profiling tool body, and the clamping jaws are connected to the portion, located on the outer edge of the profiling tool body, of the base. Compared with the prior art, the tool can complete the joint experiment of the screw on an actual steering engine, and provides experimental data support for the formulation of a tightening scheme.

Description

Technical Field

[0001] The utility model relates to the technical field of steering systems, in particular to a multifunctional testing tool for a steering machine housing. Background Art

[0002] There are many transmission structures of electric power steering gears. Based on the requirements of localization of parts, the tightening scheme designed on a platform cannot meet the actual needs and match the production line capacity. It is necessary to re-adapt the localized parts and production to determine the tightening scheme to meet the product functions. Because the role of bolts cannot be ignored, but the supplier can only measure the friction coefficient of bolts according to the national standard (ISO 16047) at present, which cannot fully adapt to our products (limitations of the national standard, BOSCH standard: VDA 235-104). The tightening method has gradually changed from the torque tightening method to the torque angle method. What is particularly important in the formulation of the tightening scheme is the friction coefficient between the screw and the corresponding counterpart and the clamping force measurement of the screw. At the same time, it is necessary to know the relationship between the friction coefficient and torque of the bolt to provide data support for the selection of tightening equipment for production line production. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a multifunctional testing tool for a steering gear housing, realizes the formulation and verification of bolt tightening plans, provides relevant data support for CAE housing simulation analysis, and can complete multiple measurement requirements.

[0004] In order to achieve the above-mentioned purpose, a multifunctional testing tool for the steering gear housing is designed, including a long housing clamping tool and a servo housing profiling tool, and its characteristics are: a servo housing profiling tool is provided on one side of the long housing clamping tool; the long housing clamping tool includes a supporting base, a supporting guide rail, and an adjustable clamping jaw of the long housing, the supporting base is connected to one end of the supporting guide rail, and the other end of the supporting guide rail is connected to the adjustable clamping jaw of the long housing; the servo housing profiling tool includes a base, a profiling tool, a push rod, and a clamping jaw, the base is provided with a profiling tool, a number of push rods are connected to the profiling tool, and a number of clamping jaws are connected to the base located at the outer edge of the profiling tool.

[0005] The top of the support rail is provided with a clamping connecting rod inclined upward, and the top of the support rail is connected to a disc-shaped interface through the clamping connecting rod. A plurality of U-shaped groove interfaces are evenly distributed on the disc-shaped interface, and the U-shaped groove interface is connected to the long shell adjustable clamping jaw through bolts.

[0006] The long shell adjustable clamping jaw is an adjustable disc-shaped mechanical clamping jaw.

[0007] The profiling tooling is in a gourd-shaped structure, and a plurality of ejector rods are connected to the lower part of the profiling tooling.

[0008] The profiling tooling is connected to the base via a plurality of bolts.

[0009] At least two push rods are provided, and the bottoms of the push rods are connected to the profiling tooling.

[0010] The clamping jaws are provided with at least three pieces, and the clamping jaws are of a "7"-shaped structure. The bottom of the clamping jaws is connected to the base, and the top corner of the base extends toward the imitation tooling.

[0011] The three clamping jaws are respectively located at the top, lower left and upper right of the copy tooling.

[0012] The base is a movable supporting base.

[0013] Compared with the prior art, the utility model provides a multifunctional testing tool for the steering gear housing, through which the joint experiment of the screws on the actual steering gear can be completed, providing experimental data support for the formulation of the tightening plan, and at the same time, the performance of the selected screws can be known through measurement, and the relationship between the friction coefficient and the tightening torque can be known, providing data for the selection of the production line tightening equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model.

[0015] Figure 2 It is a schematic diagram of the structure of the long shell clamping tooling of the utility model.

[0016] Figure 3 It is a schematic diagram of the servo housing imitation tooling structure in the utility model.

[0017] Figure 4 It is a top view of the servo housing imitation tooling structure in the utility model. DETAILED DESCRIPTION

[0018] The utility model is further described below with reference to the accompanying drawings.

[0019] like Figures 1 to 4 As shown, a servo shell profiling tooling is provided on one side of the long shell clamping tooling; the long shell clamping tooling includes a supporting base 1, a supporting guide rail 2, and an adjustable long shell jaw 3, the supporting base 1 is connected to one end of the supporting guide rail 2, and the other end of the supporting guide rail 2 is connected to the adjustable long shell jaw 3; the servo shell profiling tooling includes a base 9, a profiling tooling 7, a push rod 8, and a clamping jaw 6, the base 9 is provided with a profiling tooling 7, a plurality of push rods 8 are connected to the profiling tooling 7, and a plurality of clamping jaws 6 are connected to the base 9 located at the outer edge of the profiling tooling 7.

[0020] The top of the support rail 2 is provided with a clamp connecting rod 10 inclined upward, and the top of the support rail 2 is connected to a disc-shaped interface 11 through the clamp connecting rod 10. The disc-shaped interface 11 is evenly provided with a plurality of U-shaped groove interfaces, and the U-shaped groove interface is connected to the long shell adjustable clamp 3 through bolts.

[0021] The long shell adjustable clamping jaw 3 is an adjustable mechanical clamping jaw.

[0022] The profiling tooling 7 is in a gourd-shaped structure, and a plurality of push rods 8 are connected to the lower part of the profiling tooling 7 .

[0023] The profiling tool 7 is connected to the base 9 by a plurality of bolts.

[0024] At least two push rods 8 are provided, and the bottom of the push rods 8 is connected to the profiling tooling 7 .

[0025] At least three clamping jaws 6 are provided, and the clamping jaws 6 are of a "7"-shaped structure. The bottom of the clamping jaw 6 is connected to the base 9 , and the top corner of the base 9 extends toward the imitation tooling 7 .

[0026] The three clamping jaws 6 are respectively located at the top, lower left and upper right of the profiling tooling 7 .

[0027] The base 9 is a movable support base.

[0028] The utility model clamps the servo housing 5 by the servo housing imitation tooling to ensure that the servo housing 5 is fixed, and at the same time uses the long housing clamping tooling to clamp the cut part of the long housing 4, moves up and down to make the two housings match, manually places the bolts, uses the tightening gun to tighten, completes the joint experiment, and measures the relevant data.

[0029] Sensor patches are placed on the screws, and the deformation of the screws during the tightening process is monitored by ultrasonic sensors. The pre-tightening force of the screws is calculated using relevant software and formulas. Finally, a curve chart of the tightening angle and the screw pre-tightening force is output through the software.

[0030] A horizontal thrust is applied to the tightened long shell by a push-pull machine to generate sliding friction. The friction coefficient between the two shells can be calculated by calculating the pre-tightening force of the screw and the applied thrust.

[0031] The relevant calculation formula is Where, T is the total torque, T b is the support surface torque, T th is the thread torque, F is the axial force, P is the thread pitch, D b D is the effective diameter of the support surface friction. o is the outer diameter of the support surface, d h is the hole diameter of the gasket, d 2 is the thread pitch diameter, μtot is the total friction coefficient, μ b is the friction coefficient of the supporting surface, μ th is the thread friction coefficient.

[0032] The specific operation of the utility model is as follows:

[0033] 1. Cut the long shell, keep the part connected to the servo shell, and use the long shell clamping tool to clamp the long shell 4. For different types of shells, you only need to replace the corresponding type of long shell adjustable clamping jaws 3.

[0034] 2. Use the corresponding model of servo housing copy tooling to fix the servo housing 5, use the push rod 8 to position it, and finally fix it with three clamping claws 6.

[0035] 3. Joint experiment: Put the screws into the corresponding screw holes and tighten them with a tightening gun (the tightening parameters of the tightening gun are set according to the design requirements, and the corresponding sensors are configured to use testXpert 3 software for data acquisition and analysis.

[0036] 4. Axial force test experiment: After the screws are processed at the supplier, they are calibrated using an ultrasonic axial force measuring instrument, and then tightened using a tightening gun (the parameters are the same as the joint test settings), and the corresponding software is used to collect and analyze process parameters (axial force, tightening angle, tightening torque).

[0037] 5. Friction coefficient measurement experiment: Similar to the experimental operation in step 3 and step 4, no special settings are required for the bolts and tightening parameters. The sensor needs to measure the total torque, support surface torque and axial force. The support surface friction coefficient, thread friction coefficient and total friction coefficient of the screw are calculated using computer software data analysis.

[0038] 6. Experiment to measure the friction coefficient between shells: After tightening the screws according to the designed tightening parameters, apply a thrust to the right side of the long shell 4. Use a force sensor to monitor and collect the force. Use a displacement sensor to monitor the displacement change of the long shell. When there is a displacement change, record the thrust at this time. The friction coefficient between the shells can be calculated based on the axial force and thrust.

[0039] The back of the adjustable clamping jaw 3 of the long shell is fixed by bolts and the disc-shaped interface position of the support guide rail 2. There are symmetrically distributed U-shaped groove interfaces on the disc-shaped interface. The size of the clamping jaw can be adjusted by the bolt fixing position to adapt to the end of the long shell.

[0040] The installation sequence of the servo housing copy tooling is usually:

[0041] 1. Install the base 9 first. Note that the installation surface of the base 9 should be perpendicular to the plane of the installation position, and the horizontality and verticality of the base 9 should be ensured.

[0042] 2. Install the clamping jaw 6. Note that the mounting surface of the clamping jaw 6 should be parallel to the mounting surface of the base 9. The gap between the clamping jaw 6 and the base 9 should be uniform, and the fastening bolts should be tightened evenly.

[0043] After installation, connect the power supply and controller for debugging and testing.

[0044] The advantages of this utility model are: versatility, based on this set of combined tooling, it can complete various test requirements such as screw joint test, bolt tightening test, and friction coefficient test between shells, improve test efficiency, and reduce the tooling equipment requirements for these tests; project adaptability, this set of new multifunctional combined tooling can be adjusted according to the shape, aperture, and wall thickness of the shell and servo shell of different projects to meet the test verification requirements of different projects; economy, the supplier side or the third-party measurement organization needs to send multiple sets of long shells and servo shells. In the local laboratory, the steering machine that has completed other simple experiments can be used for experimental verification, saving experimental, material and logistics costs.

Claims

1. A multifunctional testing tool for a steering gear housing, comprising a long housing clamping tool and a servo housing profiling tool, characterized in that: A servo shell profiling tool is provided on one side of the long shell clamping tool; the long shell clamping tool comprises a support base (1), a support guide rail (2), and a long shell adjustable clamping jaw (3); the support base (1) is connected to one end of the support guide rail (2), and the other end of the support guide rail (2) is connected to the long shell adjustable clamping jaw (3); the servo shell profiling tool comprises a base (9), a profiling tool (7), a push rod (8), and a clamping jaw (6); the base (9) is provided with a profiling tool (7), a plurality of push rods (8) are connected to the profiling tool (7), and a plurality of clamping jaws (6) are connected to the base (9) located at the outer edge of the profiling tool (7).

2. The multifunctional testing tool for the steering gear housing according to claim 1, characterized in that: The top of the support rail (2) is provided with a clamping claw connecting rod (10) that is inclined upward, and the top of the support rail (2) is connected to a disc-shaped interface (11) via the clamping claw connecting rod (10), and a plurality of U-shaped groove interfaces are evenly distributed on the disc-shaped interface (11), and the U-shaped groove interface is connected to the long shell adjustable clamping claw (3) via bolts.

3. A multifunctional testing tool for a steering gear housing according to claim 1 or 2, characterized in that: The long shell adjustable clamping jaw (3) is an adjustable mechanical clamping jaw.

4. The multifunctional testing tool for the steering gear housing according to claim 1, characterized in that: The profiling tooling (7) is in the shape of a gourd, and a plurality of push rods (8) are connected to the lower part of the profiling tooling (7).

5. The multifunctional testing tool for the steering gear housing according to claim 4, characterized in that: The profiling tooling (7) is connected to the base (9) via a plurality of bolts.

6. A multifunctional testing tool for a steering gear housing according to claim 1 or 4, characterized in that: At least two of the push rods (8) are provided, and the bottoms of the push rods (8) are connected to the profiling tooling (7).

7. The multifunctional testing tool for the steering gear housing according to claim 1, characterized in that: At least three of the clamping jaws (6) are provided, and the clamping jaws (6) are of a "7"-shaped structure. The bottom of the clamping jaw (6) is connected to the base (9), and the top corner of the base (9) extends toward the imitation tooling (7).

8. A multifunctional testing tool for a steering gear housing according to claim 1 or 7, characterized in that: The three clamping claws (6) are respectively located at the top, lower left and upper right of the profiling tooling (7).

9. The multifunctional testing tool for the steering gear housing according to claim 1, characterized in that: The base (9) is a movable support base.

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