A bushing composite durability performance testing system

Abstract

The present invention relates to a bushing composite durability performance testing system, comprising a hydraulic cylinder, a linear load adapter structure, a load conversion gear structure, and a rack meshing system; the hydraulic cylinder is respectively connected to a bushing test fixture and a load conversion gear structure and a rack meshing system through a linear load adapter structure, and the rack meshing system is connected to a bushing mounting screw to form a linear displacement-angle conversion system, so as to achieve the output of linear and angular displacements of bushing products while using one hydraulic cylinder as input. The present invention uses a linear displacement-angle conversion system to achieve the output of linear and angular displacements of products while using one hydraulic cylinder as input. In order to meet the testing requirements of bushing products of different heights, the relevant components are all designed to be adjustable and can be quickly disassembled and assembled. While reducing the cost of the test system equipment, the present invention greatly improves the integration of the test system and saves the space occupied by the test equipment.

Description

Technical Field

[0001] The invention relates to a composite testing system for bushing performance testing, belonging to the technical field of automobile component performance testing. Background Art

[0002] In the development process of automobile chassis rubber vibration damping parts, it is necessary to carry out durability tests on chassis bushing products to examine the durability of the products. Due to the complexity of the stress on chassis parts, most products will bear loads in all directions during use. Generally, in order to simplify the analysis / testing process, one linear load and one torsion / swing angle load will be selected as the main inspection direction. To meet this requirement, a 2-axis durability test device is generally used for testing. There are two types of 2-axis test equipment in China. One is a combination of a torsion hydraulic cylinder (output angle load) and a linear hydraulic cylinder (output linear load), and the other is a combination of two linear hydraulic cylinders (output linear load). In the first case, the equipment cost is very high and requires a large hydraulic system and cooling system; the second occupies a large test site and has a low degree of integration. In order to reduce costs and improve the integration of the test system, a new bushing composite fatigue test system is needed. Summary of the invention

[0003] The purpose of the present invention is to provide a bushing composite durability performance testing system, which uses a linear hydraulic cylinder to apply two loads (linear and torsional directions) to the test product. The linear load is directly output through the cylinder, and the torsional / swing angle load is output through a conversion system.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: a bushing composite durability performance testing system, comprising a hydraulic cylinder, a linear load adapter structure, a load conversion gear structure, and a rack meshing system; the hydraulic cylinder is respectively connected to the bushing test fixture and the load conversion gear structure and the rack meshing system through the linear load adapter structure, and the rack meshing system is connected to the bushing mounting screw to form a linear displacement-angle conversion system, so as to realize the output of linear and angular displacement of bushing products while using one hydraulic cylinder as input.

[0005] Furthermore, the linear load adapter structure includes a conversion head, a bushing test fixture, and a mounting screw. One end of the conversion head is connected to the hydraulic cylinder, and the other end is connected to the bushing test fixture. The bushing test fixture is connected to the test frame through the mounting screw and the upper and lower bearings.

[0006] Furthermore, when the inner push rod of the hydraulic cylinder moves back and forth, it carries the bushing test fixture through the conversion head to perform linear motion with the bushing outer frame. The bushing inner frame is fixed by the mounting screw, and compressible rubber is provided between the inner frame and the outer frame.

[0007] Furthermore, the load conversion gear structure includes an adapter, a displacement connecting rod, a guide rail slider, and a transverse guide rail. The transverse guide rail and the guide rail slider are installed on a supporting platform and are consistent with the moving direction of the hydraulic cylinder. The adapter is provided with a connecting groove, and is connected to the guide rail slider through the connecting groove. The guide rail slider is fixedly connected to the displacement connecting rod, and the displacement connecting rod is connected to the gear through a gear shaft.

[0008] Furthermore, the rack meshing system includes a rack and a gear. The rack is divided into an upper rack and a lower rack. The upper rack is fixedly connected to the vertical slider, and the lower rack is fixed on the supporting platform. The gear is meshed and connected between the upper rack and the lower rack, and the displacement is transferred to the linear displacement-angle conversion system through the gear and the rack.

[0009] Furthermore, the linear displacement-angle conversion system also includes a vertical slider, a vertical guide rail, a vertical support, a mounting screw, and a connecting cross bar. The vertical slider is connected to the vertical support on both sides through the vertical guide rail, and the vertical support is connected to the mounting screw through the connecting cross bar.

[0010] Furthermore, one end of the connecting horizontal bar is a U-shaped opening to improve the efficiency of disassembly and assembly. The matching position of the mounting screw has a milling plane, and a stop pin is passed through the U-shaped opening position to prevent rotation.

[0011] Furthermore, when the hydraulic cylinder drives the displacement link to move forward / backward, it drives the gear to rotate, so that the entire linear displacement-angle conversion system outputs an angular load with the axis of the mounting screw as the rotation axis.

[0012] Furthermore, the linear displacement-angle conversion system also includes a stroke increasing mechanism, and the stroke increasing mechanism is composed of a gear and a rack.

[0013] Furthermore, the linear displacement-angle conversion system also includes an adjustable structure adapted to different sizes and different rotation angles, and the adjustable structure includes:

[0014] The adapter and the guide rail slider are equipped with grooves. Bushings of different heights correspond to gears, guide rail sliders, and vertical sliders of different diameters. The vertical guide rail is also designed to be adjustable to meet the requirements of different diameters, so as to meet the testing requirements of bushing products of different heights.

[0015] An adjustment slot is provided inside the vertical support to adjust the position of the connecting bar according to the height of different bushing products. After being fixed by a locking nut, it can meet the testing requirements of bushing products of different sizes.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention uses one linear hydraulic cylinder to provide output, which can satisfy the load output in two directions, thus reducing the construction cost of the test system.

[0018] 2. The present invention has high integration and compact structural design, and only requires one oil cylinder to provide load, thus saving the occupied space of the test system.

[0019] 3. The present invention is suitable for durability testing of bushings within a certain diameter and height range. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a general diagram of the bushing composite durability performance testing system of the present invention;

[0021] Figure 2 It is a diagram of the linear displacement-angle conversion system;

[0022] Figure 3 yes Figure 2 Partial diagram of the linear displacement-angle conversion system in .

[0023] Marking instructions: 1-Hydraulic cylinder; 2-Adapter; 3-Test frame; 4-Fixing nut; 5-Upper bearing; 6-Product to be tested; 7-Test fixture; 8-Support platform; 9-Vertical slider; 10-Vertical guide rail; 11-Vertical support; 12-Rack; 13-Lower bearing; 14-Displacement connecting rod; 15-Guide slider; 17-Lateral guide rail; 18-Hydraulic cylinder fixing seat; 19-Mounting screw; 20-Locking nut; 21-Anti-rotation pad; 23-Gear; 24-Connecting cross bar. DETAILED DESCRIPTION

[0024] In order to make the present invention more clearly understood, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0025] The present invention is a new bushing durability test system. Figure 1 As shown, the present invention mainly includes a hydraulic cylinder, a linear load adapter structure, a load conversion gear structure, a rack meshing system, a stroke enlargement mechanism and an adjustable structure for adapting to different sizes and different rotation angles.

[0026] The hydraulic cylinder is connected to the bushing test fixture, the load conversion gear structure and the rack meshing system through the linear load adapter structure. The rack meshing system is connected to the bushing mounting screw to form a linear displacement-angle conversion system, which can use one hydraulic cylinder as input and output linear and angular displacement of bushing products at the same time.

[0027] The specific structure of the present invention is shown below Figure 2 , Figure 3 , combined with Figure 2 , 3 , the description is as follows:

[0028] (1) Linear load adapter structure: including a conversion head 2, a bushing test fixture 7, a mounting screw 19, etc. One end of the conversion head 2 is connected to the hydraulic cylinder 1, and the other end is connected to the bushing test fixture 7. The bushing test fixture 7 is connected to the test frame 3 through the mounting screw 19 and the upper and lower bearings 5 ​​and 13.

[0029] When the inner push rod of the hydraulic cylinder 1 performs a certain amount of reciprocating displacement, it carries the bushing test fixture 7 through the conversion head 2 to perform linear motion with the bushing outer frame. The bushing inner frame is fixed by the mounting screw 19, and there is compressible rubber between the inner frame and the outer frame. To prevent the bushing from moving up and down, the bushing end face is fixed by the anti-rotation pad 21 and the locking nut 20.

[0030] (2) Load conversion gear structure: including adapter 2, displacement link 14, guide rail slider 15, and transverse guide 17. Transverse guide 17 and guide rail slider 15 are installed on the support platform and are consistent with the moving direction of hydraulic cylinder 1. Adapter 2 is provided with a connection groove, and is connected with guide rail slider 15 through the connection groove. Displacement link 14 is fixedly connected to guide rail slider 15, and displacement link 14 is connected to gear 23 through gear shaft.

[0031] (3) Rack meshing system: including rack 12 and gear 23. Rack 12 is divided into upper rack and lower rack. The upper rack is fixedly connected to the vertical slider 9, and the lower rack is fixed on the support platform 8. The gear 23 is meshed between the upper rack and the lower rack. The displacement is transferred to the linear displacement-angle conversion system through the gear 23 and the rack 12.

[0032] (4) Linear displacement-angle conversion system, see Figure 2 , including a vertical slider 9, a vertical guide rail 10, a vertical support 11, a mounting screw 19, and a connecting cross bar 24. The vertical support 11 is connected to the vertical slider 9 on both sides through the vertical guide rail 10, and the vertical support 11 is connected to the mounting screw 19 through the connecting cross bar 24.

[0033] When the displacement link 14 moves forward / backward, it drives the gear 23 to rotate. The upper rack meshing with the gear 23 is fixedly connected to the vertical guide rail 10 and the vertical support 11. In this way, the entire linear displacement-angle conversion system will use the axis of the mounting screw 19 as the rotation axis to output the angular load.

[0034] (5) The linear displacement-angle conversion system also includes a stroke enlargement mechanism, which is realized by the gear 23 and the rack 12.

[0035] (6) Adjustable structure:

[0036] 1) In order to adapt to bushing products of different heights, a groove is provided at the matching position of the adapter 2 and the guide rail slider 15. Bushings of different heights correspond to gears 23, guide rail sliders 15, and vertical sliders 9 of different diameters; the vertical guide rail 10 is also designed to be adjustable to meet the corresponding different diameters, thereby meeting the testing requirements of bushing products of different heights;

[0037] 2) In order to adapt to different bushing products and different inner tube heights, an adjustment slot is provided inside the vertical support 11, and the position of the connecting bar 24 can be adjusted according to the height of different products, and fixed by the locking nut 20 to meet the testing requirements of bushings of different sizes;

[0038] (7) To improve the efficiency of disassembly and assembly, one end of the connecting cross bar 24 is a U-shaped opening. At the same time, a milling plane is designed at the matching position of the mounting screw 19, and a stop pin is passed through the U-shaped opening position to prevent rotation.

[0039] The present invention uses a linear displacement-angle conversion system to achieve the output of linear and angular displacement of the product at the same time when a hydraulic cylinder is used as input. In order to meet the testing requirements of bushing products of different heights, the relevant components are all designed to be adjustable and can be quickly disassembled and assembled. The relevant components are designed to be lightweight while meeting the overall rigidity of the equipment. While reducing the cost of the test system equipment, the present invention greatly improves the integration of the test system and saves the space occupied by the test equipment.

Claims

1. A bushing composite durability performance testing system, characterized in that: It includes a hydraulic cylinder, a linear load adapter structure, a load conversion gear structure, and a rack meshing system; the hydraulic cylinder is connected to the bushing test fixture, the load conversion gear structure, and the rack meshing system respectively through the linear load adapter structure, and the rack meshing system is connected to the bushing mounting screw to form a linear displacement-angle conversion system, so as to realize the output of linear and angular displacement of bushing products with one hydraulic cylinder as input; the linear load adapter structure includes a conversion head, a bushing test fixture, and a mounting screw, one end of the conversion head is connected to the hydraulic cylinder, and the other end is connected to the bushing test fixture, and the bushing test fixture is connected to the test frame through the mounting screw and the upper and lower bearings; the load conversion gear structure includes an adapter, a displacement connecting rod, a guide rail slider, and a transverse guide rail, and the transverse guide rail and the guide rail slider are installed on the support platform and are consistent with the moving direction of the hydraulic cylinder; the adapter is provided with a connecting groove, and is connected to the guide rail slider through the connecting groove, and the guide rail slider is fixedly connected to the displacement connecting rod, and the displacement connecting rod is connected to the gear through the gear shaft; The rack meshing system includes a rack and a gear. The rack is divided into an upper rack and a lower rack. The upper rack is fixedly connected to the vertical slider, and the lower rack is fixed on the support platform. The upper rack and the lower rack are meshed and connected to the gear, and the displacement is transferred to the linear displacement-angle conversion system through the gear and the rack; The linear displacement-angle conversion system also includes a vertical slider, a vertical guide rail, a vertical support, a mounting screw, and a connecting cross bar. The two sides of the vertical support are connected to the vertical slider through the vertical guide rail, and the vertical support is connected to the mounting screw through the connecting cross bar; When the hydraulic cylinder drives the displacement connecting rod to move forward / backward, it drives the gear to rotate, so that the entire linear displacement-angle conversion system uses the axis of the mounting screw as the rotation axis to output the angle load; The linear displacement-angle conversion system also includes an adjustable structure that can adapt to different sizes and different angles of rotation, and the adjustable structure includes: a groove type provided at the matching position of the adapter and the guide rail slider, different diameters of gears, guide rail sliders, and vertical sliders corresponding to bushings of different heights; the vertical guide rail is also designed to be adjustable to meet the corresponding different diameter sizes, thereby meeting the testing requirements of bushing products of different heights; an adjustment groove is provided inside the vertical support, and the position of the connecting cross bar is adjusted according to the height of different bushing products, and after being fixed by a locking nut, the testing requirements of bushing products of different sizes are met.

2. The bushing composite durability performance testing system according to claim 1, characterized in that: When the inner push rod of the hydraulic cylinder moves back and forth, it carries the bushing test fixture through the conversion head to make linear motion with the bushing outer frame. The bushing inner frame is fixed by the mounting screw, and compressible rubber is provided between the inner frame and the outer frame.

3. The bushing composite durability performance testing system according to claim 1, characterized in that: One end of the connecting horizontal bar is a U-shaped opening to improve the efficiency of disassembly and assembly. The matching position of the mounting screw rod has a milling plane, and a stop pin is passed through the U-shaped opening position to prevent rotation.

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