CN2273857Y - Lower cardan joint used for device for testing pulling force - Google Patents
Lower cardan joint used for device for testing pulling force Download PDFInfo
- Publication number
- CN2273857Y CN2273857Y CN 96231382 CN96231382U CN2273857Y CN 2273857 Y CN2273857 Y CN 2273857Y CN 96231382 CN96231382 CN 96231382 CN 96231382 U CN96231382 U CN 96231382U CN 2273857 Y CN2273857 Y CN 2273857Y
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- top connection
- lower sub
- movable block
- resilient material
- hole
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Abstract
The utility model relates to a component of a device for testing pulling force. The lower cardan joint comprises a lower contact and an upper contact. A traveling block is arranged between two arms upward of the lower contact, and is clamped from another direction between two arms downward of the upper contact. The traveling block, the lower contact and the upper contact are connected mutually through a cross pin in the inner cavity of the traveling block. Eastic material pads are respectively arranged between the upper end face of the traveling block and the upper part of the two arms of the upper contact and between the lower end face of the traveling block and the lower part of the two arms of the lower contact. The upper contact and the lower contact can rotate round the corresponding pin bodies of the cross pins. With the utility model, the result measured by a device for testing pulling force is more accurate.
Description
The utility model relates to a kind of parts of pull force tester.
The one directional tensile test of material is a kind of important project test event.And pull force tester commonly used adopts the mode that tested material is stretched along the vertical direction to test, be that the entablature upper surface is fixed with force cell, suspension rod passes force cell and is connected with upper cardan, and the suspension rod upper end is fixed on the force cell, upper cardan is connected with last anchor clamps, an end of last clamp clamps measured material, and lower clamp is clamped the other end of measured material, lower clamp is fixedlyed connected with lower bottom base, and lower bottom base is fixed on the moving crossbeam.When the test unit of this structure in use has off-centre or sample that off-centre is arranged as if device, the stress of sample just is not only to be subjected to the unidirectional pulling force of above-below direction and to produce unidirectional distortion, but the stress that is in the stretch bending combination produces combined deformation, because heel bending stress maximum at the sample of lower clamp clamping place, so often cause particularly hard brittle material heel jackknifing of sample, bring very big error to test.
The purpose of this utility model is that a kind of more accurate lower cardan of pull force tester measured result that in use can make is provided.
The technical scheme that realizes the utility model purpose is (referring to Fig. 1, Fig. 2), and this universal joint has lower sub (1), the first resilient material pad (2), movable block (3), cross pin (4), the second resilient material pad (5) and top connection (6).The bottom of lower sub (1) is provided with cavity, the bottom of cavity communicates with the external world, the lower part wall of lower sub (1) is provided with identical two through holes (11) of relative axis, the top of lower sub (1) is provided with relative two side arms (12,13), each side arm (12,13) is provided with a through hole (14), and the axis of two through holes (14) is identical.Movable block (3) is provided with orthogonal two through holes that are provided with by horizontal direction, forms cross inner chamber.The bottom of top connection (6) is provided with relative two side arms (62,63), each side arm (62,63) is provided with a through hole (64), the axis of two through holes (64) is identical, the top of top connection (6) is provided with cavity, the top of cavity communicates with the external world, and the top wall of top connection (6) is provided with identical two through holes (61) of relative axis.Bottom between two side arms (12,13) inboard of lower sub (1) is provided with the first resilient material pad (2), the first resilient material pad (2) is provided with movable block (3), movable block (3) is provided with the second resilient material pad (5), the second resilient material pad (5) is positioned at the top between two side arms (62,63) inboard of top connection (6), the two ends of stretching out movable block (3) of first shank (41) of cross pin (4) penetrate the through hole (64) of the corresponding side arm (62,63) of top connection (6) respectively, and top connection (6) and cross pin (4) are rotationally connected; The two ends of stretching out movable block (3) of second shank (42) of cross pin (4) penetrate the corresponding side arm (12,13) of lower sub (1) respectively, and lower sub (1) and cross pin (4) are rotationally connected.
The bottom basic configuration of above-mentioned lower sub (1) is the circle ring column with circular cylindrical cavity, the basic configuration of the inner face of two side arms in top (12,13) is a vertical plane, and two inner faces are parallel to each other, the basic configuration of movable block (3) is a cube, the basic configuration on the top of top connection (6) is the circle ring column with circular cylindrical cavity, the basic configuration of the inner face of two side arms in bottom (62,63) is a vertical plane, and two inner faces are parallel to each other.
Consider that this universal joint in use has the function (referring to Fig. 3 and Fig. 4) that prevents that dust from invading, between the through hole (11) on the lower part wall of through hole on the top wall of top connection (6) (61) and lower sub (1), be provided with and be enclosed within the outer shell (71) of top connection (6) and lower sub (1), shell (71) is fixed on by securing member on the outer wall on top of top connection (6).
The utlity model has positive effect: (1) because of the special construction of this universal joint, the lower cardan that can be used as pull force tester uses, and has filled up the blank that pull force tester does not have lower cardan.This universal joint is used for pull force tester as lower cardan, and with device in after original upper cardan is used in combination, can guarantee to make sample to be in the unilateral stretching stress state at the trial all the time, thereby can guarantee that measuring accuracy is less than ± 1.0%.(2) this universal joint so top connection is difficult for tilting, helps the installation of sample because of the resilient material pad is set, even and if tilt to some extent, along with the increase of pulling force slightly firmly is a recoverable, be convenient to the carrying out of testing.(3) this universal joint not only can be used as lower cardan, also can be used as upper cardan.
Fig. 1 is a kind of outside drawing of the present utility model.
Fig. 2 is the left view of Fig. 1.
Fig. 3 has increased the structural representation behind the shell for Fig. 1.
Fig. 4 is the A-A cut-open view of Fig. 3.
Fig. 5 is an another kind of structural representation of the present utility model.
Fig. 6 is the B-B cut-open view of Fig. 5.
Fig. 7 is used for a kind of synoptic diagram of pull force tester for the utility model.
Below in conjunction with drawings and Examples the utility model is further described.
Embodiment 1,
See Fig. 1 to Fig. 4,
1. modified after turnning and milling bores the lower sub (1) and the top connection (6) of making after the processing as shown in the figure with the 40Cr alloy steel bar, the basic configuration of the bottom of lower sub (1) is the circle ring column with circular cylindrical cavity, the wall of circle ring column be provided with relative axis identical and axis cross two through holes (11) of diameter, the top of lower sub (1) is provided with relative two side arms (12,13), the basic configuration of the inner face of two side arms (12,13) is a vertical plane, and two inner faces are parallel to each other; Each side arm of lower sub (1) (12,13) is provided with a through hole (14), and the axis of two through holes (14) is identical, and the axis of through hole is orthogonal different surface beeline on this axis and the circle ring column.The basic configuration on the top of top connection (6) is the circle ring column with circular cylindrical cavity, the wall of circle ring column be provided with relative axis identical and axis cross two through holes (61) of diameter, the bottom of top connection (6) is provided with relative two side arms (62,63), the basic configuration of the inner face of two side arms (62,63) is a vertical plane, and two inner faces are parallel to each other; Each side arm of top connection (6) (62,63) is provided with a through hole (64), and the axis of two through holes (64) is identical, and the axis of through hole is orthogonal different surface beeline on this axis and the circle ring column.The lower cavity of lower sub (1) communicates with the external world from both direction up and down, and is provided with the projection (15) of annular on cavity top with the place of communicating, the external world.The upper chamber of top connection (66) communicates with the external world from both direction up and down, and is provided with the projection (65) of annular in the cavity bottom with the place of communicating, the external world.
2. making as shown in the figure basic configuration with 40Cr alloy steel products cut after modified is the cube shaped cruciform inner chamber movable block (3) that has.The cruciform inner chamber of movable block (3) is by the horizontal direction setting, and two through holes of the cross inner chamber of composition are vertical mutually in the movable block (3).A through hole is the bigger through hole of diameter, and another through hole is the less through hole of diameter.
3. after modified cut, make as shown in the figure cross pin (4) with the 40Cr alloy steel rod, second shank (42) of cross pin (4) is the less cylindrical shank of diameter, first shank (41) is the bigger cylindrical shank of diameter, and first shank (41) is along being provided with through hole with the direction of shank axis normal, and second shank (42) is through in this pin-and-hole and constitutes cross pin (4).
4. make the first resilient material pad (2) and the second resilient material pad (5) of cuboid as shown in the figure with synthetic rubber, make the shell (71) of the cylindrical shell of basic configuration as shown in the figure with No. 45 steel.
5. the annular projection (15) in lower sub (1) goes up the placement first resilient material pad (2), and the upper surface of annular projection (15) is contacted with the lower surface of the first resilient material pad (2).Go up placement at the first resilient material pad (2) and change movable block (3), the upper surface of the first resilient material pad (2) is contacted with the lower surface of movable block (3), and the through hole on less (1) two side arm of through-hole alignment lower sub (12,13) of the diameter of cruciform inner chamber that makes movable block (3), and a pair of side of movable block (3) contacts with the inner face of corresponding side arm.Go up the placement second resilient material pad (5) at movable block (3), the upper surface of movable block (3) is contacted with the lower surface of the second resilient material pad (5).Go up placement top connection (6) at the second resilient material pad (5), the upper surface of the second resilient material pad (5) is contacted with the lower surface of the annular projection (65) of top connection (6), and the through hole on two side arms (62,63) of the through-hole alignment top connection (6) that the diameter of cruciform inner chamber that makes movable block (3) is bigger, and another of movable block (3) contacts with the inner face of corresponding side arm to the side.The through hole (64) of first shank (41) from a side arm of top connection (6) penetrated, be located in two side arms (62,63) and the movable block (3); Again second shank (42) is penetrated from the through hole (14) of a side arm of lower sub (1), be located in the through hole of two side arms (12,13), movable block (3) and first shank (41) of lower sub (1); Shell (7) is fixed on the outer wall of top connection (6) by securing member.
The top connection of this universal joint (6) can be rotated around first shank (41) of cross pin (4), and at this moment, movable block (3) is motionless, and the second resilient material seat (5) is squeezed; Lower sub (1) can be rotated around second shank (42) of cross pin (4), and movable block this moment (3) is motionless, and the first resilient material pad (2) is squeezed; Universal movement is promptly formed in the resultant motion of these two kinds of direction motions.In the use, when top connection (6) and lower sub (1) are subjected to export-oriented pulling force, can make the pulling force effect point-blank, thereby can realize that multi-direction adjustment is subjected to the function of force direction, and because of having the damping action of resilient material pad (2,5), when being connected with parts such as anchor clamps in the top connection (6), can not topple over.
See Fig. 5 and Fig. 6,
All the other are identical with embodiment 1, difference is, the top of the lower cavity of lower sub (1) does not communicate with the external world, replaces annular projection (15) with circular upper plate (16), and the lower surface of resilient material pad (2) contacts with the upper surface of circular upper plate (16); The bottom of the upper chamber of top connection (6) does not communicate with the external world, replaces annular projection (65) with circular lower shoe (66), and the upper surface of resilient material pad (5) contacts with the lower surface of circular lower shoe (66).
Application examples,
See Fig. 7,
Get the lower cardan (87) of embodiment 1 gained, be contained on the tension tester.The concrete assembly relation of tension tester is, two root posts (82) are fixed on the base plate of transmission case (81), the top of two root posts (82) is fixedly connected by entablature (83), two ball screws (84) are located between the Up/down base of respective side column (82), pass the corresponding perforation screw up and down of moving crossbeam (85), and its underpart is located in the transmission case (81) and is meshed with the transmission gear of gear train.Be fixed with lower bottom base (86) on the moving crossbeam (85); Lower cardan (87) is fixed on the lower bottom base (86) by bottom connecting pin (72) and the contiguous block (861) that is fixed on the lower bottom base (86), the cylindrical connector with through hole that is the top of contiguous block (86) stretches in the lower cavity of lower sub (1), penetrate by bottom connecting pin (72) through hole (11) on the lower part wall of lower sub (1) and contiguous block (86) through hole, contiguous block (861) is fixedlyed connected with lower sub (1); The columniform lower end with through hole of second line of a couplet joint (88) is stretched in the upper chamber of top connection (6), penetrate by top connecting pin (73) lower end of through hole (61) on the top wall of top connection (6) and second line of a couplet joint (88) through hole, second line of a couplet joint (88) is fixedlyed connected with top connection (6); On second line of a couplet joint (88), also be combined with in order to eliminate the lower link head nut (89) of tolerance clearance.The top of second line of a couplet joint (88) is fixed with lower clamp (90), and the clamping mouth of lower clamp (90) is clamped an end of sample (91), and the other end of sample (91) is clamped by the clamping mouth of last anchor clamps (92).Fixedly connected with the lower end of last coupling head (93) in the upper end of last anchor clamps (92); The upper end of last coupling head (93) is stretched in the inner chamber of upper cardan (94), fixedlys connected with upper cardan (94).Force cell (95) is fixed on the upper surface of entablature (83), after entablature (83), force cell (95) are passed in the upper end of suspension rod (96), its top screws suspension rod nut (97) and is fixed on the force cell (95), fixedlys connected with the upper end of upper cardan (94) in its lower end.
When this testing machine uses, open the power switch of transmission case (81), motor is wherein rotated, by the gear train transmission, make ball screw rotation with the transmission gear engagement, thereby driving moving crossbeam (85) moves downward, the double Hooke's joint structure that has last lower cardan because of testing machine, at this moment, the lower sub (1) of lower cardan (87) is because of being fixed on the lower bottom base (86), so remain and maintain static, top connection (6) still can be rotated around first shank (41) of cross pin (4), and drive second shank (42) rotation of movable block (3) around cross pin (4), thereby universal movement is promptly formed in its resultant motion, is in the unilateral stretching stress all the time so can guarantee sample (91).
Consider the protection to test sample devices, top connecting pin (73) can adopt cast iron to make, and when pulling force reaches the stressed upper limit numerical value of device and sample when not rupturing, and makes top connecting pin (73) produce the protectiveness fracture.
Claims (3)
1, a kind of lower cardan that is used for pull force tester is characterized in that,
A, have lower sub (1), the first resilient material pad (2), movable block (3), cross pin (4), the second resilient material pad (5) and top connection (6);
The bottom of b, lower sub (1) is provided with cavity, the bottom of cavity communicates with the external world, the lower part wall of lower sub (1) is provided with identical two through holes (11) of relative axis, the top of lower sub (1) is provided with relative two side arms (12,13), each side arm (12,13) is provided with a through hole (14), and the axis of two through holes (14) is identical;
C, movable block (3) are provided with orthogonal two through holes that are provided with by horizontal direction, form cross inner chamber;
The bottom of d, top connection (6) is provided with relative two side arms (62,63), each side arm (62,63) is provided with a through hole (64), the axis of two through holes (64) is identical, the top of top connection (6) is provided with cavity, the top of cavity communicates with the external world, and the top wall of top connection (6) is provided with identical two through holes (61) of relative axis;
Bottom between two side arms (12,13) inboard of e, lower sub (1) is provided with the first resilient material pad (2), the first resilient material pad (2) is provided with movable block (3), movable block (3) is provided with the second resilient material pad (5), the second resilient material pad (5) is positioned at the top between two side arms (62,63) inboard of top connection (6), the two ends of stretching out movable block (3) of first shank (41) of cross pin (4) penetrate the through hole (64) of the corresponding side arm (62,63) of top connection (6) respectively, and top connection (6) and cross pin (4) are rotationally connected; The two ends of stretching out movable block (3) of second shank (42) of cross pin (4) penetrate the corresponding side arm (12,13) of lower sub (1) respectively, and lower sub (1) and cross pin (4) are rotationally connected.
2, the lower cardan that is used for pull force tester according to claim 1, it is characterized in that, the bottom basic configuration of lower sub (1) is the circle ring column with circular cylindrical cavity, the basic configuration of the inner face of two side arms in top (12,13) is a vertical plane, and two inner faces are parallel to each other, the basic configuration of movable block (3) is a cube, the basic configuration on the top of top connection (6) is the circle ring column with circular cylindrical cavity, the basic configuration of the inner face of two side arms in bottom (62,63) is a vertical plane, and two inner faces are parallel to each other.
3, the lower cardan that is used for pull force tester according to claim 2, it is characterized in that, between the through hole (11) on the lower part wall of through hole on the top wall of top connection (6) (61) and lower sub (1), be provided with and be enclosed within the outer shell (71) of top connection (6) and lower sub (1), shell (71) is fixed on by securing member on the outer wall on top of top connection (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96231382 CN2273857Y (en) | 1996-03-05 | 1996-03-05 | Lower cardan joint used for device for testing pulling force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96231382 CN2273857Y (en) | 1996-03-05 | 1996-03-05 | Lower cardan joint used for device for testing pulling force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2273857Y true CN2273857Y (en) | 1998-02-04 |
Family
ID=33908579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96231382 Expired - Fee Related CN2273857Y (en) | 1996-03-05 | 1996-03-05 | Lower cardan joint used for device for testing pulling force |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2273857Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680225A (en) * | 2012-05-30 | 2012-09-19 | 上海电气核电设备有限公司 | Pulling-out force test device |
| CN103136991A (en) * | 2011-11-28 | 2013-06-05 | 南京航空航天大学 | Combined tensile experimental device |
| CN103983508A (en) * | 2014-05-14 | 2014-08-13 | 于法周 | Impact hammer head device |
| CN108181177A (en) * | 2017-10-30 | 2018-06-19 | 武汉船用机械有限责任公司 | A kind of device for testing tensile force and test method |
-
1996
- 1996-03-05 CN CN 96231382 patent/CN2273857Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103136991A (en) * | 2011-11-28 | 2013-06-05 | 南京航空航天大学 | Combined tensile experimental device |
| CN102680225A (en) * | 2012-05-30 | 2012-09-19 | 上海电气核电设备有限公司 | Pulling-out force test device |
| CN103983508A (en) * | 2014-05-14 | 2014-08-13 | 于法周 | Impact hammer head device |
| CN108181177A (en) * | 2017-10-30 | 2018-06-19 | 武汉船用机械有限责任公司 | A kind of device for testing tensile force and test method |
| CN108181177B (en) * | 2017-10-30 | 2021-07-27 | 武汉船用机械有限责任公司 | Tension testing device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |