CN111515877A - Automatic test fixture easy to fix - Google Patents

Automatic test fixture easy to fix Download PDF

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Publication number
CN111515877A
CN111515877A CN202010304505.2A CN202010304505A CN111515877A CN 111515877 A CN111515877 A CN 111515877A CN 202010304505 A CN202010304505 A CN 202010304505A CN 111515877 A CN111515877 A CN 111515877A
Authority
CN
China
Prior art keywords
push
base
fixed
automatic test
test fixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010304505.2A
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Chinese (zh)
Inventor
商宇游
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Kangjufu Automation Equipment Co ltd
Original Assignee
Suzhou Kangjufu Automation Equipment Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suzhou Kangjufu Automation Equipment Co ltd filed Critical Suzhou Kangjufu Automation Equipment Co ltd
Priority to CN202010304505.2A priority Critical patent/CN111515877A/en
Publication of CN111515877A publication Critical patent/CN111515877A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B11/00Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders

Abstract

The invention discloses an easy-to-fix automatic test fixture, which comprises a base, wherein a groove is formed in the middle of the upper surface of the base, parallel rollers are arranged in the groove, mounting boxes are arranged on two sides of the upper surface of the base, a cam is arranged on one side, far away from the center of the base, of the mounting box, the two cams are opposite, a driving device for driving the cams to rotate is arranged in the base, a push-pull mechanism is arranged on one side, close to the center of the base, of the mounting box, the power output end of the push-pull mechanism penetrates out of the mounting box, an elastic clamping plate is fixed at the power output end of the push-pull mechanism, the push-pull mechanism can be driven by the cam through the driving of one driving device, so that two elastic clamping plates can clamp a to-be tested piece, the to-be tested piece is clamped quickly and conveniently, and the roller, and the abrasion of the piece to be tested is reduced.

Description

Automatic test fixture easy to fix
Technical Field
The invention relates to the technical field of jigs, in particular to an automatic test jig easy to fix.
Background
Along with the flourishing and prosperous economy, the living standard of people is continuously improved, the development of production technology is better and better, the utilization of time of people is more and more rigorous, in life, the requirement on equipment is higher and higher, and the work efficiency of the equipment is expected to be improved through the innovation of the equipment, the work time is reduced, the use efficiency is improved, and the maximum value is exerted. For the factory test of electronic products, a jig is generally adopted to lock a piece to be tested firstly, the existing jig generally adopts a manual locking mode of upper compression, the whole locking is inconvenient and slow, the testing time is delayed, and the testing efficiency is low.
Disclosure of Invention
The invention aims to provide an automatic test fixture easy to fix, and aims to solve the problems that the existing fixture generally adopts a manual locking mode of upper compression, the whole locking is inconvenient and slow, the test time is delayed, and the test efficiency is low.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an automatic test fixture who easily fixes, includes the base, the upper surface middle part of base is seted up flutedly, the internally mounted of recess has side by side cylinder, the upper surface both sides of base all are provided with the mounting box, one side that the base center was kept away from to the inside of mounting box is provided with the cam, and two cams are opposite, the internally mounted of base has and is used for driving cam pivoted drive arrangement, push-and-pull mechanism is installed to one side that the inside of mounting box is close to the base center, push-and-pull mechanism's power take off end wears out the mounting box, and push-and-pull mechanism's power take off end is fixed with flexible.
Preferably, still include back backup pad, back backup pad is fixed in the back top of base, and the welding of the upper end the place ahead of back backup pad has the connecting plate.
Preferably, a hydraulic cylinder is fixed on the connecting plate, and a test probe is installed at the lower end of a telescopic rod of the hydraulic cylinder.
Preferably, the cylinder includes the pivot, and the circumference outside cover of pivot is equipped with the barrel, and the circumference surface mounting of barrel has the cushion.
Preferably, the driving device comprises two main shafts and a motor, the two main shafts are respectively installed at the axis of the cam, a driven gear is fixed on each main shaft, the motor is arranged between the two main shafts, a driving shaft is fixed at the power output end of the motor, a driving gear is installed at the upper end of the driving shaft, a linkage gear is meshed between the driving gear and the driven gear, and a linkage shaft is fixed at the center of the linkage gear.
Preferably, the push-pull mechanism comprises a shell, a spring body is arranged inside the shell, a push-pull rod is inserted into the spring body, a baffle is fixed to one end of the push-pull rod after the one end of the push-pull rod penetrates through the mounting box and is in contact with the cam, the other end of the push-pull rod penetrates through the shell, and the push-pull rod penetrates through one end of the shell and is fixed to the elastic clamping plate.
Preferably, the elastic clamping plate comprises a mounting plate, one side of the mounting plate, which is close to the center of the base, is provided with a foam plate through a buffer spring, the middle part of the buffer spring is inserted with a guide rod, one end of the guide rod, which is close to the mounting plate, penetrates through the mounting plate, and one end of the guide rod, which penetrates through the mounting plate, is fixed with a limiting plate.
Compared with the prior art, the invention has the beneficial effects that:
1. the cam can push the push-pull device through the driving of the driving device, so that the two elastic clamping plates can clamp the to-be-tested piece, the to-be-tested piece can be clamped quickly and conveniently, and the fixing efficiency of the jig is improved;
2. the roller is arranged at the position where the test piece to be tested is placed, when the elastic clamping plates at the two sides are close to each other, the test piece to be tested can be pushed to the right middle of the device so as to be aligned with the test probe above, and the roller can ensure that the test piece to be tested and the base are in rolling friction, so that the abrasion of the test piece to be tested is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic top view of the connection between the elastic clamping plate and the push-pull mechanism according to the present invention;
FIG. 3 is a schematic structural diagram of a driving device according to the present invention;
FIG. 4 is a schematic end view of a drum of the present invention;
FIG. 5 is a schematic view of the mounting of the test probe of the present invention.
In the figure: 1. a rear support plate; 2. mounting a box; 3. a base; 31. a groove; 4. a drum; 41. a rotating shaft; 42. a barrel; 43. a rubber pad; 5. an elastic splint; 51. mounting a plate; 52. soaking a cotton plate; 53. a buffer spring; 54. a guide bar; 55. a limiting plate; 6. a drive device; 61. a driven gear; 62. a main shaft; 63. a linkage gear; 64. a linkage shaft; 65. a driving gear; 66. a drive shaft; 67. a motor; 7. a connecting plate; 8. a hydraulic cylinder; 9. a push-pull mechanism; 91. a baffle plate; 93. a spring body; 94. a push-pull rod; 95. a housing; 10. a cam; 11. the probe is tested.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1 and 5, in an embodiment of the present invention, an easy-to-fix automatic test fixture includes a rear support plate 1 and a base 3, the rear support plate 1 is fixed at the rear upper side of the base 3, a connection plate 7 is welded in front of the upper end of the rear support plate 1, the rear support plate 1 is used for mounting the connection plate 7, the connection plate 7 is used for mounting a hydraulic cylinder 8, the connection plate 7 is fixed with a hydraulic cylinder 8, a test probe 11 is mounted at the lower end of a telescopic rod of the hydraulic cylinder 8, and the test probe 11 can move downward when the hydraulic cylinder 8 extends, so as to perform a test;
referring to fig. 1 and 4, a groove 31 is formed in the middle of the upper surface of the base 3, the groove 31 is used for accommodating a roller 4, the upper surface of the roller 4 is on the same horizontal plane as the upper surface of the base 3, the rollers 4 are installed inside the groove 31 side by side, the roller 4 includes a rotating shaft 41, a barrel 42 is sleeved outside the circumference of the rotating shaft 41, a rubber pad 43 is fixed on the outer surface of the circumference of the barrel 42, when a to-be-tested piece is placed on the upper surface of the roller 4, the roller 4 and the to-be-tested piece generate rolling friction to avoid abrasion of the to-be-tested piece, and when the to-be-tested piece is pressed by the test probe 11, the rubber pad 43 can perform a buffering action on the;
referring to fig. 1, 2 and 3, mounting boxes 2 are respectively arranged on two sides of the upper surface of a base 3, the mounting boxes 2 are used for mounting parts, a cam 10 is arranged on one side of the inside of each mounting box 2, which is far away from the center of the base 3, the two cams 10 are opposite to each other, a driving device 6 for driving the cam 10 to rotate is arranged inside the base 3, and the driving device 6 can drive the cam 10 to rotate;
referring to fig. 1 and 3, the driving device 6 includes two main shafts 62 and two motors 67, the two main shafts 62 are respectively installed at the axes of the cams 10, a driven gear 61 is fixed on the main shafts 62, the motor 67 is installed between the two main shafts 62, a driving shaft 66 is fixed at the power output end of the motor 67, a driving gear 65 is installed at the upper end of the driving shaft 66, a linkage gear 63 is engaged between the driving gear 65 and the driven gear 61, a linkage shaft 64 is fixed at the center of the linkage gear 63, the driving gear 65 can be driven to rotate by the driving shaft 66 when the motor 67 rotates, the driving gear 65 can drive the driven gear 61 to rotate by the linkage gear 63, and the cam 10 can be driven to rotate by the driven gear 61 through the main shafts 62;
referring to fig. 1 and 2, a push-pull mechanism 9 is installed on one side of the interior of the mounting box 2 close to the center of the base 3, a power output end of the push-pull mechanism 9 penetrates out of the mounting box 2, an elastic clamping plate 5 is fixed on the power output end of the push-pull mechanism 9, the tip of the cam 10 can push the push-pull mechanism 9 when rotating, the push-pull mechanism 9 can push the elastic clamping plate 5, and a to-be-tested piece can be clamped and locked when the two elastic clamping plates 5 are close to each other;
as shown in fig. 2, the push-pull mechanism 9 includes a housing 95, a spring body 93 is disposed inside the housing 95, a push-pull rod 94 is inserted into the spring body 93, one end of the push-pull rod 94 penetrates through the mounting box 2 and is fixed with a baffle 91, the baffle 91 contacts with the cam 10, the other end of the push-pull rod 94 penetrates through the housing 95, and the push-pull rod 94 penetrates through one end of the housing 95 and is fixed with the elastic clamp plate 5, when the cam 10 rotates, the tip of the cam pushes the baffle 91, the baffle 91 pushes the push-pull rod 94, the spring body 93 is in a compressed state, the push-pull rod 94 pushes the elastic clamp plate 5, when the tip of the cam 10 is gradually away from the baffle 91, the spring body 93 is in a state of recovering to a natural state, and the spring body 93 can pull the elastic clamp plate 5 by pulling the push-pull rod 94;
with continued reference to fig. 2, the elastic clamping plate 5 includes a mounting plate 51, a foam board 52 is mounted on one side of the mounting plate 51 close to the center of the base 3 through a buffer spring 53, the foam board 52 is arranged on one side of the rectangular board far from the mounting plate 51, a guide rod 54 is inserted in the middle of the buffer spring 53, one end of the guide rod 54 close to the mounting plate 51 penetrates through the mounting plate 51, a limiting plate 55 is fixed at one end of the guide rod 54 penetrating through the mounting plate 51, and the buffer spring 53 plays a role in buffering when the two elastic clamping plates 5 approach each other.
The working principle and the using process of the invention are as follows: when the device is used, a to-be-tested piece is placed on the upper surface of the roller 4, the driving device 6 drives the cam 10 to rotate, the tip end of the cam 10 can push the baffle plate 91 when the cam 10 rotates, the baffle plate 91 pushes the push-pull rod 94, the spring main body 93 is in a compressed state at the moment, the push-pull rod 94 pushes the elastic clamping plates 5, the to-be-tested piece can be clamped and locked when the two elastic clamping plates 5 are close to each other, the to-be-tested piece can be pushed to the middle of the groove 31 when the two elastic clamping plates 5 are close to each other, and rolling friction is generated between the to-be-tested piece and the roller 4 at the;
when the tip of the cam 10 is gradually away from the stop plate 91, the spring body 93 is in a state of returning to the natural state, and the spring body 93 can pull the elastic clamping plate 5 by pulling the push-pull rod 94, so that the elastic clamping plate 5 no longer clamps the test piece to be removed.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides an automatic test fixture of easily fixing, includes base (3), its characterized in that: the improved roller press is characterized in that a groove (31) is formed in the middle of the upper surface of the base (3), side-by-side rollers (4) are arranged in the groove (31), mounting boxes (2) are arranged on two sides of the upper surface of the base (3), one side, far away from the center of the base (3), of the inside of each mounting box (2) is provided with a cam (10), the two cams (10) are opposite to each other, a driving device (6) used for driving the cams (10) to rotate is arranged in the inside of the base (3), one side, close to the center of the base (3), of the inside of each mounting box (2) is provided with a push-pull mechanism (9), the power output end of each push-pull mechanism (9) penetrates out of the mounting boxes (2), and an elastic clamping plate.
2. The easy-to-fix automatic test fixture according to claim 1, wherein: still include back backup pad (1), back backup pad (1) is fixed in the back top of base (3), and the welding of the upper end the place ahead of back backup pad (1) has connecting plate (7).
3. The easy-to-fix automatic test fixture according to claim 2, wherein: and a hydraulic cylinder (8) is fixed on the connecting plate (7), and a test probe (11) is installed at the lower end of a telescopic rod of the hydraulic cylinder (8).
4. The easy-to-fix automatic test fixture according to claim 1, wherein: the roller (4) comprises a rotating shaft (41), a cylinder body (42) is sleeved outside the circumference of the rotating shaft (41), and a rubber mat (43) is fixed on the outer surface of the circumference of the cylinder body (42).
5. The easy-to-fix automatic test fixture according to claim 1, wherein: drive arrangement (6) include main shaft (62) and motor (67), main shaft (62) are provided with two altogether, and install respectively in the axle center department of cam (10) two main shafts (62), be fixed with driven gear (61) on main shaft (62), motor (67) set up between two main shafts (62), the power take off end of motor (67) is fixed with driving shaft (66), driving gear (65) are installed to the upper end of driving shaft (66), the meshing has linkage gear (63) between driving gear (65) and driven gear (61), and the center department of linkage gear (63) is fixed with universal driving shaft (64).
6. The easy-to-fix automatic test fixture according to claim 1, wherein: the push-pull mechanism (9) comprises a shell (95), a spring main body (93) is arranged inside the shell (95), a push-pull rod (94) is inserted into the spring main body (93), a baffle (91) is fixed to one end of the push-pull rod (94) after penetrating through the mounting box (2), the baffle (91) is in contact with the cam (10), the other end of the push-pull rod (94) penetrates through the shell (95), and one end of the push-pull rod (94) penetrating through the shell (95) is fixed to the elastic clamping plate (5).
7. The easy-to-fix automatic test fixture according to claim 1, wherein: elastic splint (5) include mounting panel (51), and foam board (52) are installed through buffer spring (53) in one side that mounting panel (51) are close to base (3) center, and the middle part of buffer spring (53) is pegged graft and is had guide arm (54), and guide arm (54) pass mounting panel (51) near the one end of mounting panel (51), and guide arm (54) pass the one end of mounting panel (51) and be fixed with limiting plate (55).
CN202010304505.2A 2020-04-17 2020-04-17 Automatic test fixture easy to fix Pending CN111515877A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010304505.2A CN111515877A (en) 2020-04-17 2020-04-17 Automatic test fixture easy to fix

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010304505.2A CN111515877A (en) 2020-04-17 2020-04-17 Automatic test fixture easy to fix

Publications (1)

Publication Number Publication Date
CN111515877A true CN111515877A (en) 2020-08-11

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Application Number Title Priority Date Filing Date
CN202010304505.2A Pending CN111515877A (en) 2020-04-17 2020-04-17 Automatic test fixture easy to fix

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112617912A (en) * 2021-01-08 2021-04-09 湖南省肿瘤医院 Gynecological tumor sampling device

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01319966A (en) * 1988-06-21 1989-12-26 Nec Corp Sputtering device
DE20114812U1 (en) * 2001-09-07 2001-10-31 Deckel Maho Geretsried Gmbh Device for actuating a collet
CN202717267U (en) * 2012-07-22 2013-02-06 成都生辉电子科技有限公司 Heavy workpiece conveying structure
CN104511761A (en) * 2013-09-26 2015-04-15 西安众智惠泽光电科技有限公司 Cam driving type compressing clamp for shaft workpieces
CN106102326A (en) * 2016-07-29 2016-11-09 苏州博众精工科技有限公司 A kind of cam clamping mechanism
CN206732259U (en) * 2017-04-19 2017-12-12 慈溪市宜美佳铝业有限公司 A kind of finished product saw
CN108356553A (en) * 2018-01-16 2018-08-03 马鞍山力众机械科技有限公司 A kind of debugging dismounting apparatus for fastening of component of machine
CN108608021A (en) * 2018-04-17 2018-10-02 淮北智淮科技有限公司 A kind of processing unit (plant) of new energy materials plank
CN208034494U (en) * 2018-03-15 2018-11-02 江苏华哲标签有限公司 A kind of drop making pressing device
CN208672453U (en) * 2018-08-28 2019-03-29 深圳市亿天诚激光科技有限公司 A kind of precision metal plate detection device
CN208854485U (en) * 2018-10-10 2019-05-14 中科电力装备集团有限公司 Positioning device is used in a kind of production and processing of gas-filling cabinet
CN208895957U (en) * 2018-11-02 2019-05-24 河南省瑞歌传动机械有限公司 A kind of easy-to-mount elastic gap fixture
CN109986270A (en) * 2019-05-24 2019-07-09 德庆县智联机械科技有限公司 A kind of fixed device of aluminium product
CN209394023U (en) * 2019-01-11 2019-09-17 湖南旺坤管业有限公司 A kind of perforating steel pipe device
CN110274816A (en) * 2019-03-21 2019-09-24 成都川行科技塑业有限公司 A kind of automatic constant-pressure pressure testing machine

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01319966A (en) * 1988-06-21 1989-12-26 Nec Corp Sputtering device
DE20114812U1 (en) * 2001-09-07 2001-10-31 Deckel Maho Geretsried Gmbh Device for actuating a collet
CN202717267U (en) * 2012-07-22 2013-02-06 成都生辉电子科技有限公司 Heavy workpiece conveying structure
CN104511761A (en) * 2013-09-26 2015-04-15 西安众智惠泽光电科技有限公司 Cam driving type compressing clamp for shaft workpieces
CN106102326A (en) * 2016-07-29 2016-11-09 苏州博众精工科技有限公司 A kind of cam clamping mechanism
CN206732259U (en) * 2017-04-19 2017-12-12 慈溪市宜美佳铝业有限公司 A kind of finished product saw
CN108356553A (en) * 2018-01-16 2018-08-03 马鞍山力众机械科技有限公司 A kind of debugging dismounting apparatus for fastening of component of machine
CN208034494U (en) * 2018-03-15 2018-11-02 江苏华哲标签有限公司 A kind of drop making pressing device
CN108608021A (en) * 2018-04-17 2018-10-02 淮北智淮科技有限公司 A kind of processing unit (plant) of new energy materials plank
CN208672453U (en) * 2018-08-28 2019-03-29 深圳市亿天诚激光科技有限公司 A kind of precision metal plate detection device
CN208854485U (en) * 2018-10-10 2019-05-14 中科电力装备集团有限公司 Positioning device is used in a kind of production and processing of gas-filling cabinet
CN208895957U (en) * 2018-11-02 2019-05-24 河南省瑞歌传动机械有限公司 A kind of easy-to-mount elastic gap fixture
CN209394023U (en) * 2019-01-11 2019-09-17 湖南旺坤管业有限公司 A kind of perforating steel pipe device
CN110274816A (en) * 2019-03-21 2019-09-24 成都川行科技塑业有限公司 A kind of automatic constant-pressure pressure testing machine
CN109986270A (en) * 2019-05-24 2019-07-09 德庆县智联机械科技有限公司 A kind of fixed device of aluminium product

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112617912A (en) * 2021-01-08 2021-04-09 湖南省肿瘤医院 Gynecological tumor sampling device

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Application publication date: 20200811