CN213422566U

CN213422566U - Multifunctional plate spring rigidity and stress monitoring equipment

Info

Publication number: CN213422566U
Application number: CN202022839920.6U
Authority: CN
Inventors: 许金兵; 鲁绍华; 单小伟; 郝光希
Original assignee: Shandong Automobile Spring Factory Zibo Co ltd
Current assignee: Shandong Automobile Spring Factory Zibo Co ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-06-11
Anticipated expiration: 2030-11-30

Abstract

The utility model belongs to the technical field of the leaf spring detects, concretely relates to multi-functional leaf spring rigidity, stress monitoring equipment, including the test bench, the test bench top is equipped with pressure device, and the mesa both ends of test bench are equipped with the subassembly that slides, and the both ends of the leaf spring that awaits measuring are fixed respectively on two subassemblies that slide, and the center of the leaf spring that awaits measuring is located under pressure device's depression bar, pressure device's depression bar under the terminal surface be equipped with pressure sensor, displacement sensor is still connected to the depression bar lower extreme. The surface of the plate spring to be tested is pasted with a strain gauge, and the strain gauge is electrically connected with a strain gauge. Multifunctional leaf spring rigidity, stress monitoring facilities, simple structure, reasonable in design, transition with the steel ball in the middle of two point spare, ensure that the atress is even, the utility model discloses be provided with pressure sensor, displacement sensor and foil gage, can detect leaf spring rigidity and stress simultaneously, detect convenient and fast, excellent in use effect has good economic benefits.

Description

Multifunctional plate spring rigidity and stress monitoring equipment

Technical Field

The utility model relates to a multi-functional leaf spring rigidity, stress monitoring facilities belongs to leaf spring detection technical field.

Background

Leaf springs are commonly used in vehicle suspensions, and when the leaf springs are installed in the vehicle suspension and subjected to a normal load, each leaf spring is deformed by a force. The suspension type shock absorption vehicle has the functions of connecting the vehicle frame and the vehicle axle together in a suspension mode, being exposed between the vehicle frame and the vehicle axle, bearing the load impact of wheels on the vehicle frame, reducing the violent vibration of the vehicle body, and keeping the running stability of the vehicle and the adaptability to different road conditions.

The leaf spring stiffness is the ratio of the load increment to the deflection increment, i.e. the load required to produce a unit deflection. And the plate spring forms stretching movement when bearing load impact, the stretching movement generates stress, and the plate spring can break when reaching the fatigue limit at a stress concentration point. Therefore, the rigidity and the stress of the plate spring are detected, and the detection is an important detection item for laboratory detection in the plate spring manufacturing industry. Therefore, the applicant applies a multifunctional leaf spring rigidity and stress monitoring device, which can detect the rigidity and the stress of a leaf spring at the same time and meet the test requirements.

SUMMERY OF THE UTILITY MODEL

According to the not enough among the above prior art, the utility model discloses the technical problem who solves is: the multifunctional plate spring rigidity and stress monitoring equipment capable of detecting the rigidity and the stress of the plate spring simultaneously is provided, so that the test requirements are met.

Multifunctional leaf spring rigidity, stress monitoring facilities, including the test bench, the test bench top is equipped with pressure device, and the mesa both ends of test bench are equipped with the subassembly that slides, the both ends of the leaf spring that awaits measuring are fixed respectively on two subassemblies that slide, the center of the leaf spring that awaits measuring is located under pressure device's depression bar, pressure device's depression bar under the terminal surface be equipped with pressure sensor, displacement sensor is still connected to the depression bar lower extreme.

The rigidity of the leaf spring can be obtained by applying downward pressure to the center of the leaf spring through the pressurizing device, measuring the applied pressure (namely load increment) through the pressure sensor, measuring the displacement (namely deformation increment) of the leaf spring through the displacement sensor and calculating the ratio of the applied force to the displacement of the leaf spring, namely the load increment to the deformation increment.

The top surface center department of the leaf spring that awaits measuring placed the briquetting, the briquetting be the character cut in bas-relief of invering, placed the steel ball between briquetting and the pressure sensor, briquetting top surface center be equipped with the recess of steel ball looks adaptation, the steel ball is located the recess in. Because the bottom surface of the pressure lever of the pressurizing device is a plane, the middle part of a test piece (a plate spring to be tested) is difficult to ensure to be completely the plane, and therefore, the steel balls are used for transition between the two parts, and the uniform stress is ensured.

Leaf spring surface that awaits measuring paste foil gage, foil gage electric connection strain gauge. The leaf spring surface is owing to warp, gives the strain gauge with signal transmission through the foil gage, will warp and convert the stress into and obtain the result, conveniently monitors the leaf spring.

Preferably, the eye at both ends of the plate spring to be tested is hinged with the pin shaft on the sliding component.

Compared with the prior art, the utility model beneficial effect who has is:

multifunctional leaf spring rigidity, stress monitoring facilities, simple structure, reasonable in design, transition with the steel ball in the middle of two point spare, ensure that the atress is even, the utility model discloses be provided with pressure sensor, displacement sensor and foil gage, can detect leaf spring rigidity and stress simultaneously, detect convenient and fast, have good economic benefits.

Drawings

Fig. 1 is a schematic front view of the present invention;

fig. 2 is a schematic side view of the present invention.

In the figure: 1. a pressure lever; 2. a pressure sensor; 3. a steel ball; 4. briquetting; 5. a plate spring to be tested; 6. a displacement sensor; 7. a strain gauge; 8. a slipping component; 9. a test bed.

Detailed Description

The invention will be further described with reference to the following examples:

as shown in fig. 1-2, multi-functional leaf spring rigidity, stress monitoring facilities, including test bench 9, test bench 9 top is equipped with pressure device, the mesa both ends of test bench 9 are equipped with the subassembly 8 that slides, the book ear at 5 both ends of the leaf spring that awaits measuring is articulated with the round pin axle on the subassembly 8 that slides, realizes the both ends of the leaf spring 5 that awaits measuring through this kind of mode and slides the fixed on subassembly 8 for two, the center of the leaf spring 5 that awaits measuring is located pressure lever 1 under pressure device, pressure device's 1 terminal surfaces under the depression bar 1 be equipped with pressure sensor 2, displacement sensor 6 is still connected to depression bar 1 lower extreme. The surface of the plate spring 5 to be tested is pasted with a strain gauge 7, and the strain gauge 7 is electrically connected with a strain gauge.

Wherein, the top surface center department of the plate spring 5 that awaits measuring has placed briquetting 4, briquetting 4 be the character cut in bas-relief of inversion, placed steel ball 3 between briquetting 4 and pressure sensor 2, 4 top surface centers of briquetting are equipped with the recess with 3 looks adaptations of steel ball, steel ball 3 be located the recess in. Because the bottom surface of the pressure lever 1 of the pressurizing device is a plane, the middle part of a test piece (a plate spring 5 to be tested) is difficult to ensure to be completely the plane, and the steel ball 3 is used for transition between the two parts, so that the uniform stress is ensured.

The utility model discloses a theory of operation:

the plate spring stiffness can be obtained by applying a downward pressure at the center of the plate spring by a pressurizing means, measuring the applied pressure (i.e., load increment) by a pressure sensor 2, measuring the displacement (i.e., deformation increment) of the plate spring by a displacement sensor 6, and calculating the ratio of the applied force to the plate spring displacement, i.e., load increment to deformation increment. The leaf spring surface is owing to warp, gives the strain gauge with signal transmission through foil gage 7, converts the deformation into stress and obtains the result, conveniently monitors the leaf spring. The utility model discloses can detect leaf spring rigidity and stress simultaneously, detect convenient and fast, excellent in use effect.

Claims

1. The utility model provides a multi-functional leaf spring rigidity, stress monitoring equipment, includes test bench (9), and test bench (9) top is equipped with pressure device, and the mesa both ends of test bench (9) are equipped with subassembly (8) that slides, and the both ends of the leaf spring (5) of awaiting measuring are fixed respectively on two subassembly (8) that slide, and the center of the leaf spring (5) of awaiting measuring is located under pressure bar (1) of pressure device, its characterized in that: the lower end face of a pressure rod (1) of the pressurizing device is provided with a pressure sensor (2), and the lower end of the pressure rod (1) is also connected with a displacement sensor (6).

2. The multifunctional leaf spring stiffness, stress monitoring device of claim 1, wherein: the top surface center department of leaf spring (5) that awaits measuring placed briquetting (4), briquetting (4) be the character cut in bas-relief of invering, placed steel ball (3) between briquetting (4) and pressure sensor (2), briquetting (4) top surface center be equipped with the recess of steel ball (3) looks adaptation, steel ball (3) be located the recess in.

3. The multifunctional leaf spring stiffness, stress monitoring device of claim 1, wherein: and a strain gauge (7) is attached to the surface of the plate spring (5) to be tested, and the strain gauge (7) is electrically connected with a strain gauge.

4. The multifunctional leaf spring stiffness and stress monitoring device according to any one of claims 1 to 3, wherein: the eye at both ends of the plate spring (5) to be measured is hinged with the pin shaft on the sliding component (8).