CN208459177U

CN208459177U - A kind of connecting pin shear strength experimental provision

Info

Publication number: CN208459177U
Application number: CN201821165207.4U
Authority: CN
Inventors: 吕掌权; 唐丽萍; 吴贵军; 国秀丽
Original assignee: Anyang Institute of Technology
Current assignee: Anyang Institute of Technology
Priority date: 2018-07-23
Filing date: 2018-07-23
Publication date: 2019-02-01
Anticipated expiration: 2028-07-23

Abstract

The present application discloses an experimental device for the shear strength of connecting pins, which includes a lower fixed plate, an upper fixed plate, a hydraulic cylinder, and a moving plate. On the upper and lower fixed plates, four uprights are arranged parallel to each other in the vertical direction, the moving plate is slidingly matched with the four uprights, the upper fixed plate is fixed with a hydraulic cylinder, the piston rod of the hydraulic cylinder is fixed with the moving plate, and the moving plate is fixed in shearing The upper side of the shear seat is provided with pin holes along the front and rear directions, the lower end of the shear seat is fixed with a pressure sensor, the lower end of the pressure sensor is fixed on the adjustment plate, and the fixed position of the adjustment plate on the lower fixed plate can be adjusted, and the pressure The sensor and the control solenoid valve of the hydraulic cylinder are connected with the control system through the line, the pressure sensor is used to collect the loaded load in real time, and the control system accurately records the load change of the connecting pin and the shear fracture load.

Description

A kind of connecting pin shear strength experimental provision

Technical field

The utility model relates to a kind of shear strength experimental provision more particularly to a kind of connecting pin shear strength experiment dresses It sets.

Background technique

Connecting pin is widely used in the various aspects of mechanical connection since its structure is simple, at low cost, and current connecting pin Intensity generallys use the specification of experience selection connecting pin, or uses Strength co-mputation, due to factors such as material limitation, processing technologys Limitation, but both methods is not exclusively reliable, and connecting pin fracture sometimes will cause safety accident, and current connecting pin tests dress It sets, structure is complicated, and it is at high cost, it is unfavorable for promoting the use of.

The application acquires the load of load, control system accurate recording connecting pin load change using pressure sensor in real time And shear fracture load, so that control system calculates connecting pin according to the diameter and shear fracture loadometer of experiment connecting pin Shear defect；It is loaded using hydraulic cylinder, load change is steady, no impact, noise.It is provided with half slot on cutting head, cuts It cuts and is provided with pin hole on seat, the state consistency by external applied load with shear pin, experimental result is more acurrate.Cut Block is in bottom plate On fixation position it is adjustable, realize and be provided with half slot on cutting head, be provided with pin hole when shearing connecting pin on Cut Block Coaxially.Connecting pin is cut two sections simultaneously, if the single section shearing of connecting pin is recorded, it is single can to calculate shearing Shear strength when section, the connecting pin shear strength experimental provision wide adaptability of the application.

Summary of the invention

The purpose of this utility model is that: Driven by Hydraulic Cylinder cutting head, the pin on half slot and Cut Block on cutting head Connecting pin is sheared in hole, pressure sensor is fixed on Cut Block, the fixed adjustment plate of pressure sensor, the position of adjustment plate can adjust It is whole, it realizes and is coaxially disposed when half slot shears connecting pin with pin hole.

Purpose of the utility model is realized as follows: a kind of connecting pin shear strength experimental provision, including support frame 1, Bottom plate 2, column 3, upper mounted plate 4, hydraulic cylinder 5, movable plate 7, cutting head 8, Cut Block 10, pressure sensor 12, control System, the fixed bottom plate 2 in 1 upper end of support frame, bottom plate 2 are horizontally disposed in left-right direction, and bottom plate 2 moves Movable plate 7, upper mounted plate 4 are arranged in parallel, and 3 quantity of column is four, and 3 lower end of four columns is fixed on bottom plate 2, and four Root post 3 is arranged in parallel along the vertical direction, the fixed upper mounted plate 4 in the upper end of four columns 3, movable plate 7 and four columns 3 It is slidably matched, movable plate 7 is between bottom plate 2 and upper mounted plate 4, the fixed hydraulic cylinder 5, liquid on upper mounted plate 4 The piston rod of cylinder pressure 5 extends downwardly after passing through upper mounted plate 4, the fixed movable plate 7 of the piston-rod lower end of hydraulic cylinder 5, movable plate 7 Downside center fixed shear head 8,8 lower end of cutting head are provided with the half slot 801 for accommodating connecting pin 15, the shearing 10 upside of seat is provided with along pin hole 101 in the front-back direction, for installing connecting pin 15, cutting head 8 in left-right direction vertically to Lower stretching, 10 upper end of Cut Block is provided with notch 102 in left-right direction, for avoiding the lower part of cutting head 8, notch 102 two sides and the lower gap of cutting head 8 cooperate, the 10 lower end fixation pressure sensor 12 of Cut Block, pressure sensing 12 lower end of device is fixed in adjustment plate 11, and fixation position of the adjustment plate 11 on bottom plate 2 is adjustable.

Pressure sensor 12, hydraulic cylinder control solenoid valve connect with control system by route.

Fixation position adjustable structure of the adjustment plate 11 on bottom plate 2 are as follows: the adjustment plate 11 The left and right sides is provided with upper and lower through slot 111, the position setting adaptable with slot 111 is run through of bottom plate 2 along the longitudinal direction Have threaded hole, be combined with studs 14 in threaded hole, 14 top of studs is combined with wing nut 13, studs 14 with Two sides through slot 111 are provided with gap, adjust position in left-right direction for adjustment plate 11.

The two sides of notch 102 and the lower gap of cutting head 8 are no more than 0.1mm.

What 7 fixed shear head 8 of movable plate was connected by screw bolts structure is detachably fixed connection.

Cut Block 10 is connect with level pressure force snesor 12 using being detachably fixed for bolt arrangement.

Gap between the pin hole 101 and connecting pin 15 is no more than 0.1mm, the half slot diameter 801 on cutting head 8 Diameter than connecting pin 15 is big, and is no more than 0.1mm.

Compared with prior art, the utility model has the advantages that

1. acquire the load of load in real time using pressure sensor, control system accurate recording connecting pin load change and Shear fracture load, so that control system calculates cutting for connecting pin according to the diameter and shear fracture loadometer of experiment connecting pin The shearing stress limit；

2. being loaded using hydraulic cylinder, load change is steady, no impact, noise；

3. it is provided with half slot on cutting head, is provided with pin hole on Cut Block, the state one by external applied load with shear pin It causes, experimental result is more acurrate；

4. fixation position of the Cut Block on bottom plate is adjustable, realizes and be provided with half slot, Cut Block on cutting head On to be provided with pin hole coaxial when shearing connecting pin；

5. connecting pin is cut two sections simultaneously, if the single section shearing of connecting pin is recorded, it can calculate and cut Shear strength when singulation section, the connecting pin shear strength experimental provision wide adaptability of the application.

Detailed description of the invention

Fig. 1 is the overall construction drawing one of connecting pin shear strength experimental provision.

Fig. 2 is the overall construction drawing two of connecting pin shear strength experimental provision.

Fig. 3 is the structural schematic diagram of connecting pin shear strength experimental provision cutting mechanism.

Fig. 4 is connecting pin shear strength experimental provision Cut Block structural schematic diagram.

Schematic diagram when Fig. 5 is the shearing of connecting pin shear strength experimental provision.

Specific embodiment

In conjunction with Fig. 1~5, a kind of connecting pin shear strength experimental provision of the utility model, including support frame 1, lower fixation Plate 2, four columns 3, upper mounted plate 4, hydraulic cylinder 5, attachment base 6, movable plate 7, cutting head 8, Cut Block 10, adjustment plate 11, pressure Force snesor 12, wing nut 13, studs 14, control system, the fixed bottom plate 2 in 1 upper end of support frame are lower solid Fixed board 2 is horizontally disposed in left-right direction, and bottom plate 2, movable plate 7, upper mounted plate 4 are arranged in parallel, 3 lower end of four columns Be fixed on bottom plate 2, four columns 3 are arranged along the vertical direction, and four columns 3 are arranged in parallel, four columns 3 it is upper Hold fixed upper mounted plate 4, movable plate 7 is slidably matched with four columns 3, movable plate 7 be located at bottom plate 2 and upper mounted plate 4 it Between, the fixed hydraulic cylinder 5 on upper mounted plate 4, the piston rod of hydraulic cylinder 5 extends downwardly after passing through upper mounted plate 4, hydraulic cylinder 5 piston-rod lower end fixed connecting base 6, attachment base 6 are fixed on movable plate 7, and the downside center fixation of movable plate 7 is cut Cutting head 8,7 fixed shear head 8 of movable plate is connected by screw bolts the connection that is detachably fixed of structure, and 8 lower end of cutting head is provided with appearance It receives the half slot 801 of connecting pin 15, is provided on the upside of the Cut Block 10 along pin hole 101 in the front-back direction, for installing The connecting pin 15 used when experiment, cutting head 8 stretch out straight down in left-right direction, and 10 upper end of Cut Block is provided with edge The notch 102 of left and right directions, for avoiding the lower part of cutting head 8, the two sides of notch 102 and the lower gap of cutting head 8 cooperate, Gap is no more than 0.1mm, the 10 lower end fixation pressure sensor 12 of Cut Block, 10 lower end fixation pressure sensor of Cut Block 12 are detachably fixed connection using bolt arrangement, and 12 lower end of pressure sensor is fixed in adjustment plate 11, a left side for adjustment plate 11 Right two sides are provided with along the longitudinal direction upper and lower through slot 111, and bottom plate 2 is provided with through the adaptable position of slot 111 Threaded hole is combined with studs 14 in threaded hole, and 14 top of studs is combined with wing nut 13, and adjustment plate 11 is for adjusting The position of whole Cut Block 10, when moving down cutting head 8, when the half slot 801 of 8 lower end of cutting head touches connecting pin 15, semicircle Slot 801 and connecting pin 15 are coaxial.

When needing to carry out shear strength experiment to a certain specification connecting pin 15, Cut Block 10 is replaced, the pin of Cut Block 10 is made Hole 101 intermittently cooperates with connecting pin 15, and gap is no more than 0.1mm, and connecting pin 15 is inserted into pin hole 101, replaces cutting head 8, the half slot diameter 801 on cutting head 8 is bigger than the diameter of connecting pin 15, and is no more than 0.1mm, controls the piston of hydraulic cylinder 5 Bar moves down, and movable plate 7 moves down, and cutting head 8 moves down, and when the half slot 801 of 8 lower end of cutting head is apart from connecting pin 1-2mm, unscrews butterfly Shape nut 13, adjusts the position of adjustment plate 11, and first successive step half slot 801 is in coaxial position with connecting pin 15, controls hydraulic The piston rod of cylinder 5 continues to move down, and when the half slot 801 of 8 lower end of cutting head touches connecting pin 15, adjusts half slot 801 and connects Outbound 15 is in coaxial, and the piston rod of control hydraulic cylinder 5 continues to move down, until connecting pin 15 is cut, pressure sensor 12 is remembered Pressure when recording the pressure change process of Cut Block 10 and cutting, control system show the shear pressure and meter of connecting pin 15 The shear strength calculated.

Claims

1. A connecting pin shear strength test device, comprising a support frame (1), a lower fixing plate (2), a column (3), an upper fixing plate (4), a hydraulic cylinder (5), a moving plate (7), A shearing head (8), a shearing seat (10), a pressure sensor (12), and a control system, characterized in that: the upper end of the support frame (1) is fixed with a lower fixing plate (2), and the lower fixing plate (2) Horizontally arranged along the left and right directions, the lower fixing plate (2), the moving plate (7), and the upper fixing plate (4) are arranged in parallel with each other, the number of the uprights (3) is four, and the lower ends of the four uprights (3) are fixed on the lower fixing plate ( 2) Up, the four uprights (3) are arranged parallel to each other along the vertical direction, the upper end of the four uprights (3) is fixed with the upper fixed plate (4), and the moving plate (7) is slidingly matched with the four uprights (3) to move The plate (7) is located between the lower fixing plate (2) and the upper fixing plate (4), the hydraulic cylinder (5) is fixed on the upper fixing plate (4), and the piston rod of the hydraulic cylinder (5) passes through the upper fixing plate (4). The plate (4) protrudes downward, the lower end of the piston rod of the hydraulic cylinder (5) is fixed to the moving plate (7), and the center of the lower side of the moving plate (7) is fixed to the shearing head (8) and the shearing head (8). The lower end is provided with a semicircular groove (801) for accommodating the connecting pin (15), and the upper side of the shear seat (10) is provided with a pin hole (101) along the front-rear direction for installing the connecting pin (15), shearing The cutting head (8) protrudes vertically downward along the left-right direction, and the upper end of the shearing seat (10) is provided with a notch (102) along the left-right direction, which is used to avoid the lower part of the cutting head (8). The two sides of 102) are in clearance fit with the lower end of the shear head (8). The lower end of the shear seat (10) is fixed with the pressure sensor (12), and the lower end of the pressure sensor (12) is fixed on the adjustment plate (11). The fixed position of the plate (11) on the lower fixing plate (2) can be adjusted;

The pressure sensor (12) and the control solenoid valve of the hydraulic cylinder are connected with the control system through lines.

2 . The connecting pin shear strength test device according to claim 1 , wherein the adjustment plate ( 11 ) has an adjustable fixed position on the lower fixing plate ( 2 ) as follows: the adjustment plate The left and right sides of (11) are provided with up and down through grooves (111) along the front and rear directions, the lower fixing plate (2) is provided with threaded holes at the positions that are compatible with the through grooves (111), and double-headed screws are screwed into the threaded holes. The upper part of the column (14) is screwed with a wing nut (13), and the double-ended stud (14) and the two sides of the through groove (111) are provided with gaps for adjusting the plate (11) Adjust the position in the left and right directions.

3. The connecting pin shear strength test device according to claim 1, wherein the gap between the two sides of the notch (102) and the lower end of the shear head (8) is not more than 0.1 mm.

4. The connecting pin shear strength test device according to any one of claims 1-3, characterized in that: the movable plate (7) is fixed to the shearing head (8) by a detachable fixed connection of a bolt connection structure.

5. The connecting pin shear strength test device according to any one of claims 1-3, characterized in that: the shear seat (10) and the constant pressure sensor (12) are detachably and fixedly connected by a bolt structure.

6. The connecting pin shear strength test device according to any one of claims 1-3, characterized in that: the gap between the pin hole (101) and the connecting pin (15) does not exceed 0.1 mm, and the shearing The diameter of the semicircular groove (801) on the cutting head (8) is larger than the diameter of the connecting pin (15) and does not exceed 0.1mm.