Synchronous measuring device for double meshing clearances of steering engine

Abstract

The utility model discloses a synchronous measuring device for double meshing clearances of a steering engine, which comprises a direct-current stabilized power supply, a computer, a data acquisition instrument and a steering system testing machine which are electrically connected with the computer, and a steering engine test prototype fixedly erected on a test bench of the steering system testing machine, the steering engine test prototype is provided with a worm end meshing clearance measuring point, a gear shaft end meshing clearance measuring point and an input shaft, the two ends are load loading ends, the test end of the steering system test machine is fixedly connected with the input shaft, the data output end is electrically connected with the data acquisition instrument, and two displacement sensors electrically connected with the direct-current stabilized power supply are fixedly arranged on the test bench. And the displacement sensors are electrically connected with the data acquisition instrument and are respectively inserted into the two measurement points. According to the utility model, common equipment of each main engine plant is utilized, a set of measuring device is built at lower cost, the full-stroke acquisition double-meshing clearance can be automatically and synchronously measured in real time, the use is convenient, and the universality is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of steering gear testing, in particular to a synchronous measurement device for the double meshing clearance of a steering gear. Background Art

[0002] A steering gear is a machine that helps a driver exert force when turning the steering wheel, so as to reduce the force exerted by the driver during steering, achieving the purpose of making it easy and convenient for the driver to drive. It is mainly divided into rack and pinion steering and worm and worm gear steering. There are generally three types of power steering devices on the market: electric motor power steering, rack and pinion hydraulic power steering, and electro-hydraulic power steering.

[0003] The double meshing clearance of a steering gear is an important evaluation item of a mechanical steering gear and an important embodiment of the performance of a steering gear. The control of the meshing clearance is also an important means to optimize noise, vibration, and harshness (NVH), which is a comprehensive issue in automobile manufacturing quality and gives the most direct and obvious feeling to automobile users. Traditional meshing clearance measurements are carried out based on the single meshing clearance measurement method of a mechanical steering gear, which can only perform single-point tests, and the measuring instruments are a combination of a torque wrench and a dial indicator / micrometer. Referring to a steering gear rack and pinion meshing clearance test device disclosed in a Chinese utility model with the authorization announcement number CN 210486755 U, which includes a bench and a displacement measurement mechanism (dial indicator / micrometer) fixed on the bench through a bracket. There is a bracket for fixing the steering gear test prototype on the bench. The displacement measurement mechanism is located above the adjusting bolt of the steering gear test prototype. Through holes are provided on the adjusting bolt and the pressing block of the steering gear test prototype. The measuring head of the displacement measurement mechanism passes through the through hole and contacts the back side of the rack tooth in the housing of the steering gear test prototype, that is, the test end of the displacement measurement mechanism is inserted into the corresponding test point of the steering gear test prototype. This test device has a relatively simple structure. Although it improves the measurement accuracy, it requires manual cooperation to rotate the torque wrench multiple times to assist in the measurement, and it cannot perform synchronous measurement of the full-stroke double meshing clearance with load.

[0004] Existing major vehicle manufacturers generally have steering system testing machines, data acquisition instruments, and computers equipped with measurement systems. How to use the existing conditions to build a measurement device at a relatively low cost to solve the above problems is something that major vehicle manufacturers attach great importance to. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a synchronous measurement device for the double meshing clearance of a steering gear in view of the deficiencies of the prior art. By using the equipment commonly available in major vehicle manufacturers, a measurement device can be built at a relatively low cost, which can synchronously measure and collect the double meshing clearance in real time and automatically throughout the whole stroke, is convenient to use, and has high versatility.

[0006] The technical solution for achieving the purpose of the present utility model is as follows:

[0007] A synchronous measurement device for the double meshing clearances of a steering gear, comprising a DC regulated power supply, a computer installed with a test system, a data acquisition instrument electrically connected to the computer, a steering system testing machine, and a steering gear test prototype fixedly mounted on the test bench of the steering system testing machine. The steering gear test prototype is provided with a worm end meshing clearance measurement point, a gear shaft end meshing clearance measurement point, and an input shaft, and both ends are load loading ends. The test end of the steering system testing machine is fixedly connected to the input shaft, and the data output end is electrically connected to the data acquisition instrument. Two displacement sensors electrically connected to the DC regulated power supply are fixedly mounted on the test bench, and both displacement sensors are electrically connected to the data acquisition instrument and are respectively inserted into the worm end meshing clearance measurement point and the gear shaft end meshing clearance measurement point.

[0008] Further, a bottom plate is fixedly provided on the test bench by bolts, two brackets are vertically fixedly connected to the bottom plate by welding, and the brackets are fixedly connected to the steering gear test prototype by bolts.

[0009] Further, a support seat is fixedly provided on the test bench by bolts, and the displacement sensor is fixedly mounted on the upper surface of the support seat by screws.

[0010] Further, a first sliding groove is provided on the upper surface of the support seat along the X-axis direction, a first sliding block is provided in the first sliding groove in a matching manner, a second sliding groove is provided on the upper surface of the first sliding block along the Y-axis direction, a second sliding block is provided in the second sliding groove, the displacement sensor is fixedly mounted on the upper surface of the second sliding block by screws, strip-shaped grooves are provided on the sides of the first sliding groove and the second sliding groove, and locking screws penetrating through the corresponding strip-shaped grooves are respectively provided on the first sliding block and the second sliding block.

[0011] Further, fixing frames are fixedly mounted on the test bench at both ends of the steering gear test prototype, and the two fixing frames are respectively detachably fixedly connected to the two load loading ends.

[0012] Further, the two load loading ends of the steering gear test prototype are respectively fixedly connected to the equipment load ends of the steering system testing machine.

[0013] By adopting the above technical solution, the present utility model has the following beneficial effects:

[0014] (1) The utility model provides a working power supply for the displacement sensor through a DC regulated power supply, drives the input shaft through a steering system test machine and collects the angular signal of the input shaft to a data acquisition instrument. At the same time, two displacement sensors collect the data of the measurement points and transmit them to the data acquisition instrument, which is then transmitted to a computer for processing and real-time display, so as to realize real-time automatic synchronous measurement of the double meshing clearance during the full stroke, which is convenient to use; the overall structure is simple, and a set of measurement device is built at a low cost by using the equipment commonly available in each main engine factory, with high versatility.

[0015] (2) The utility model respectively realizes the erection of the steering gear test prototype and the displacement sensor on the test bench through the structure composed of the bottom plate and the bracket and the support seat, with a simple structure and convenient assembly.

[0016] (3) The utility model realizes the front-back and left-right movement of the displacement sensor along the horizontal plane through the cooperation of the slider, the sliding groove and the locking screw, so as to be adjustable and facilitate the coaxial insertion of the test shaft of the displacement sensor into the measurement point.

[0017] (4) The utility model is additionally provided with a fixing frame to fix the two load loading ends of the steering gear test prototype, so as to realize single-point testing.

[0018] (5) The utility model realizes the synchronous test of the double meshing clearance with load during the full stroke by connecting the two load loading ends of the steering gear test prototype with the equipment load end of the steering system test machine. Description of the Drawings

[0019] In order to make the content of the utility model easier to be clearly understood, the following further detailed description of the utility model is made according to specific embodiments in conjunction with the drawings, where:

[0020] Figure 1 is the structural block diagram of the utility model;

[0021] Figure 2 is the structural schematic diagram of the utility model.

[0022] The reference numerals in the drawings are:

[0023] DC regulated power supply 1, computer 2, data acquisition instrument 3, steering system test machine 4, steering gear test prototype 5, worm end meshing clearance measurement point 5-1, gear shaft end meshing clearance measurement point 5-2, input shaft 5-3, load loading end 5-4, displacement sensor 6, bottom plate 7, bracket 8, support seat 9. Detailed Embodiments

[0024] In order to better understand the above technical solutions, the following will make a detailed description of the above technical solutions in conjunction with the drawings of the specification and specific embodiments.

[0025] (Example 1)

[0026] As Figures 1 to 2 shown, the synchronous measurement device for the double meshing clearance of the steering gear includes a DC regulated power supply 1, a computer 2 installed with a test system (Dewesoft X3 & steering system durability test machine C language controller), a data acquisition instrument 3, a steering system test machine 4, a steering gear test prototype 5, and two displacement sensors 6. Among them, the data acquisition instrument 3 and the steering gear test prototype 5 are both electrically connected to the computer 2. The steering gear test prototype 5 is fixedly installed on the test bench of the steering system test machine 5, and includes a main body and a worm end meshing clearance measurement point 5-1, a gear shaft end meshing clearance measurement point 5-2, an input shaft 5-3, and load loading ends 5-4 at both ends provided on the main body. The data output end of the steering system test machine 4 is electrically connected to the data acquisition instrument 3, and the test end is fixedly connected to the input shaft 5-3. The DC regulated power supply 1 is electrically connected to the displacement sensors 6 to provide a stable working voltage for the displacement sensors 6. The input shaft 5-3 is driven by the steering system test machine 4, and the angle signal of the input shaft 5-3 is collected to the data acquisition instrument 3. The two displacement sensors 6 are both electrically connected to the data acquisition instrument 3 and are respectively inserted into the worm end meshing clearance measurement point and the gear shaft end meshing clearance measurement point to synchronously transmit the measurement data to the data acquisition instrument 3, and then transmitted by the data acquisition instrument 3 to the computer 2 for processing and real-time display, so as to realize real-time automatic synchronous measurement of the double meshing clearance during full stroke acquisition. It is convenient to use, the overall structure is simple, and the equipment commonly available in each vehicle factory is utilized to build a set of measurement devices at a low cost, with high versatility.

[0027] Specifically, a bottom plate 7 is fixedly provided on the test bench by bolts. The bottom plate 7 is vertically and fixedly connected to two brackets 8 by welding. The brackets 8 are fixedly connected to the steering gear test prototype 5 by bolts, so as to realize the fixed installation of the steering gear test prototype 5 on the test bench. A support seat 9 is fixedly provided on the test bench by bolts. The upper surface of the support seat 9 is provided with a first chute arranged along the X-axis direction. A first slider is arranged in the first chute. The upper surface of the first slider is provided with a second chute arranged along the Y-axis direction. A second slider is arranged in the second chute. The displacement sensor is fixedly installed on the upper surface of the second slider by screws. Strip-shaped grooves are provided on the sides of the first chute and the second chute. Locking screws penetrating the corresponding strip-shaped grooves are respectively provided on the first slider and the second slider, so as to realize the forward and backward and left and right movement of the displacement sensor 6 along the horizontal plane, and realize adjustability, which is convenient to coaxially insert the test shaft of the displacement sensor 6 into the measurement point.

[0028] The displacement sensor 6 is a Keyence contact type high-precision displacement sensor with a range of 0-100 mm, a long needle head type, and a sensor resolution of 2 μm. The data acquisition instrument 3 is an Austrian Dewetron data acquisition system, with a model of DEW43.

[0029] When conducting the full - stroke double - meshing clearance synchronization test, the load - loading ends 5 - 4 at both ends of the steering gear test prototype 5 are in a free state. The displacement sensors 6 are installed at the test points. The input shaft 5 - 3 rotates ±500° in full stroke according to the specification requirements. The data acquisition instrument 3 simultaneously collects the angle of the input shaft 5 - 3 and the changes in the meshing clearances at two measurement points, and transmits them to the computer 2 for processing and display, realizing the automatic full - stroke double - meshing clearance synchronization test.

[0030] (Embodiment 2)

[0031] The structure of this embodiment is similar to that of Embodiment 1, except that fixed frames fixedly installed on the test bench are provided at both ends of the steering gear test prototype 5, and the two fixed frames are respectively detachably and fixedly connected to the two load - loading ends 5 - 4. When the single - point double - meshing clearance test needs to be carried out, the two ends of the steering gear test prototype 5 are rigidly fixed through the fixed frames. The displacement sensors 6 are installed at the test points. The input shaft rotates ±15° according to the specification requirements. The data acquisition instrument 3 simultaneously collects the angle of the input shaft 5 - 3 and the changes in the meshing clearances at two measurement points, and transmits them to the computer 2 for processing and display, realizing the automatic full - stroke double - meshing clearance synchronization test.

[0032] (Embodiment 3)

[0033] The structure of this embodiment is similar to that of Embodiment 1, except that the two load - loading ends 5 - 4 of the steering gear test prototype 5 are respectively fixedly connected to the equipment load ends of the steering system test machine 4, so as to conduct the full - stroke double - meshing clearance synchronization test with load. During the specific test, the corresponding load is applied as required. The displacement sensors 6 are installed at the test points. The input shaft rotates ±500° in full stroke according to the specification requirements. The data acquisition instrument 3 simultaneously collects the angle of the input shaft 5 - 3 and the changes in the meshing clearances at two measurement points, and transmits them to the computer 2 for processing and display, realizing the automatic full - stroke double - meshing clearance synchronization test.

[0034] The utility model provides a working power supply for the displacement sensors 6 through the DC regulated power supply 1, drives the input shaft 5 - 3 through the steering system test machine 4 and collects the angle signal of the input shaft 5 - 3 to the data acquisition instrument 3. At the same time, the two displacement sensors 6 collect the data at the measurement points and transmit them to the data acquisition instrument 3, which is transmitted to the computer for processing and then displayed in real - time, so as to realize the real - time automatic synchronous measurement of the full - stroke acquisition of the double - meshing clearance, which is convenient to use; the overall structure is simple, and a set of measurement devices can be built at a low cost by using the equipment commonly available in each main engine factory, with high versatility.

[0035] The specific embodiments described above have further elaborated on the purpose, technical solution, and beneficial effects of the present utility model. It should be understood that the above are only specific embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A synchronous measurement device for the double meshing clearance of a steering gear, characterized in that: It includes a DC regulated power supply, a computer installed with a test system, a data acquisition instrument electrically connected to the computer, a steering system test machine, and a steering gear test prototype fixedly installed on the test bench of the steering system test machine. The steering gear test prototype is provided with a worm end meshing clearance measurement point, a gear shaft end meshing clearance measurement point, and an input shaft. Both ends are load loading ends. The test end of the steering system test machine is fixedly connected to the input shaft, and the data output end is electrically connected to the data acquisition instrument. Two displacement sensors electrically connected to the DC regulated power supply are fixedly installed on the test bench. Both of the two displacement sensors are electrically connected to the data acquisition instrument and are respectively inserted into the worm end meshing clearance measurement point and the gear shaft end meshing clearance measurement point.

2. The synchronous measuring device for the double meshing clearance of a steering gear according to claim 1, characterized in that: A bottom plate is fixedly installed on the test bench by bolts. The bottom plate is vertically fixedly connected by welding with two brackets. The brackets are fixedly connected to the steering gear test prototype by bolts.

3. The synchronous measurement device for the double meshing clearance of a steering gear according to claim 1, characterized in that: A support seat is fixedly installed on the test bench by bolts. The displacement sensor is fixedly installed on the upper surface of the support seat by screws.

4. A synchronous measurement device for the double meshing clearance of a steering gear according to claim 3, characterized in that: The upper surface of the support seat is provided with a first chute arranged along the X-axis direction. A first slider that matches is arranged in the first chute. The upper surface of the first slider is provided with a second chute arranged along the Y-axis direction. A second slider is arranged in the second chute. The displacement sensor is fixedly installed on the upper surface of the second slider by screws. Bar-shaped grooves are arranged on the sides of the first chute and the second chute. Locking screws penetrating through the corresponding bar-shaped grooves are respectively arranged on the first slider and the second slider.

5. The synchronous measurement device for the double meshing clearance of a steering gear according to claim 1, characterized in that: Both ends of the steering gear test prototype are provided with fixing frames fixedly installed on the test bench. The two fixing frames are respectively detachably and fixedly connected to the two load loading ends.

6. The synchronous measurement device for the double meshing clearance of a steering gear according to claim 1, wherein: The two load loading ends of the steering gear test prototype are respectively fixedly connected to the equipment load ends of the steering system test machine.

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