CN109333402B - Gapless locking clamp - Google Patents
Gapless locking clamp Download PDFInfo
- Publication number
- CN109333402B CN109333402B CN201811314658.4A CN201811314658A CN109333402B CN 109333402 B CN109333402 B CN 109333402B CN 201811314658 A CN201811314658 A CN 201811314658A CN 109333402 B CN109333402 B CN 109333402B
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- locking
- clamp body
- locking clamp
- shaped
- screw
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- 238000003780 insertion Methods 0.000 claims abstract description 11
- 230000037431 insertion Effects 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 7
- 230000009286 beneficial effect Effects 0.000 claims description 2
- 239000003638 chemical reducing agent Substances 0.000 description 16
- 238000005259 measurement Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Clamps And Clips (AREA)
- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
Abstract
The invention discloses a gapless locking clamp, which comprises a locking clamp body, an I-shaped locking rod and a locking rod driving screw, wherein the I-shaped locking rod is arranged on the locking clamp body; the longitudinal section of the locking clamp body is of a U-shaped structure and comprises an opening end and a closing end, the opening end comprises an upper locking clamp body and a lower locking clamp body, the upper locking clamp body and the lower locking clamp body are respectively provided with a movable guide rail for placing and moving an I-shaped locking rod, and the closing end is internally provided with a screw insertion hole for inserting a driving screw of the locking rod; the center of the I-shaped locking rod is provided with a threaded hole and is inserted into the rail for moving; the locking rod driving screw is inserted from the screw insertion hole and is inserted into the center threaded hole of the I-shaped locking rod, the locking rod driving screw is rotated, and the I-shaped locking rod can move towards the opening end or the closing end of the locking clamp body along with the locking rod driving screw through threaded transmission. The clamp disclosed by the invention can be used for firmly clamping a workpiece, is in gapless contact with the workpiece, reduces radial force, is convenient to operate, and has a good application prospect.
Description
Technical Field
The invention relates to a clamp technology, in particular to a gapless locking clamp.
Background
The precision speed reducer is widely applied to various fields, with the development of industrial automation technology, the performance index requirement on the speed reducer is higher and higher, and particularly in the robot field, the transmission efficiency, the rotating speed requirement, the load capacity and the like of the speed reducer seriously influence the working precision and the service life of the system, so that the performance detection of the speed reducer is particularly important.
In the measurement test of torsional rigidity of the speed reducer, an input shaft of the speed reducer is required to be fixed, only an output shaft is loaded, and a rigidity curve is formed by recording torque and a corner value. In the test of measuring the backlash of the speed reducer, the output end of the speed reducer is required to be fixed, and the angular displacement value of the input end is measured. Therefore, a locking clamp is needed to realize locking and fixing of the input shaft or the output shaft. The input end and the output end must ensure the locking braking effect in locking and fixing, otherwise, the detection result is influenced. In the detection process, the radial force generated by locking can lead to deformation of the measurement shafting, and errors are introduced to the performance measurement result of the speed reducer, so that the radial force generated by the locking clamp on the measurement shafting of the speed reducer detector is required to be very small. In order to improve the measurement efficiency of the speed reducer detector, the clamping speed and the locking speed of the locking clamp are also required to be improved. The locking clamp is arranged inside the shell of the speed reducer detector, and the clamp is required to be locked by inserting an inner hexagonal wrench into a small hole on the shell in the using process of the locking clamp.
But the connection between the existing locking clamp structures is complex, the clamping time is long, the use is troublesome, and the requirements of the precise speed reducer detector on radial force reduction, good braking effect and the like of the locking clamp cannot be met. Therefore, a gapless locking clamp needs to be designed, so that the locking clamp is in gapless contact with a locked device, radial force is reduced, braking effect is improved, the structural design of the locking clamp is compact, the locking clamp is convenient to install in a speed reducer detector, occupied space is small, the structural design of the speed reducer detector is not influenced, and meanwhile, an inner hexagonal wrench can be used outside a speed reducer shell to lock the locking clamp.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a gapless locking clamp, which can ensure that the clamp is in gapless contact with a locked workpiece, reduce radial force and not damage the shape of the locked workpiece.
The technical scheme adopted by the invention is as follows: a gapless locking clamp comprises a locking clamp body, an I-shaped locking rod and a locking rod driving screw; the longitudinal section of the locking clamp body is of a U-shaped structure and comprises an opening end and a closing end, the opening end of the locking clamp body comprises an upper locking clamp body and a lower locking clamp body, moving guide rails for placing and moving the I-shaped locking rod are respectively arranged in the upper locking clamp body and the lower locking clamp body, and screw insertion holes for inserting driving screws of the locking rod are formed in the closing end of the locking clamp body; the I-shaped locking rod is arranged in the opening end of the locking clamp body, and two ends of the I-shaped locking rod are respectively positioned in the movable guide rail of the upper locking clamp body and the movable guide rail of the lower locking clamp body, so that the I-shaped locking rod can move along the movable guide rail; a threaded hole is formed in the center of the I-shaped locking rod; one end of the locking rod driving screw is positioned in the screw inserting hole, and the other end of the locking rod driving screw penetrates through the screw inserting hole, is inserted into the threaded hole of the I-shaped locking rod and is connected with the threaded hole in a matched mode, so that when the locking rod driving screw rotates, the I-shaped locking rod can move towards the closed end of the locking clamp body along with the locking rod driving screw through threaded transmission to compress the mouth of the locking clamp body towards the central axis or move towards the opening end of the locking clamp body to enable the locking clamp body to recover the shape.
Furthermore, the gapless locking clamp further comprises a screw limiting device for limiting the axial movement of the locking rod driving screw, so that the locking rod driving screw can only perform rotary movement in the screw insertion hole.
The screw limiting device comprises a screw locking check ring and a slotted cone end set screw, the screw locking check ring is arranged at the root positions of the upper locking clamp body and the lower locking clamp body in the locking clamp body, and the locking rod driving screw is inserted into the threaded hole of the I-shaped locking rod through the screw locking check ring; and the slotted cone end set screw is connected with the threaded hole of the screw locking check ring and is contacted with the locking rod driving screw.
Furthermore, the movable guide rail is of a T-shaped structure, and the width of the movable guide rail is larger than that of the I-shaped locking rod, so that the I-shaped locking rod can move towards the opening end or the closing end of the locking clamp body in the movable guide rail.
Further, the included angle between the upper surface of the upper locking clamp body and the lower surface of the lower locking clamp body and the horizontal plane is 5 degrees, so that an inclination angle is ensured to facilitate deformation of the upper locking clamp body and the lower locking clamp body.
Further, the upper surface of the upper locking clamp body is provided with a cylindrical opening at the root position of the upper locking clamp body, the lower surface of the lower locking clamp body is provided with a cylindrical opening at the root position of the lower locking clamp body, and the deformation of the opening end of the locking clamp body is facilitated.
Furthermore, the I-shaped locking rod is in an I-shaped structure, so that two end faces of the I-shaped locking rod can be clamped on the upper surface of the upper locking clamp body and the lower surface of the lower locking clamp body, and a longitudinal acting force can be applied to the upper locking clamp body and the lower locking clamp body in the process that the I-shaped locking rod moves towards the closed end of the locking clamp body.
Further, the surface of the contact part of the I-shaped locking rod and the upper surface of the upper locking clamp body and the lower surface of the lower locking clamp body is of an arc-shaped structure, so that abrasion of the I-shaped locking rod in the moving process on the inclined surface is reduced.
Further, a locking clamp fixing hole for placing and fixing the locking clamp body is formed in the closed end of the locking clamp body.
The beneficial effects of the invention are as follows: the gapless locking clamp can realize the gapless fixed clamping of the workpiece to be tested, so that the clamping part of the workpiece is uniformly stressed, the radial force is reduced, and the workpiece is stably and firmly clamped. The clamp is simple to operate, saves the clamping time of the locking clamp, and improves the working efficiency.
Drawings
Fig. 1: the invention relates to a structure schematic diagram of a gapless locking clamp;
fig. 2: the invention relates to a front view structure schematic diagram of a gapless locking clamp;
fig. 3: the invention relates to a top view structural schematic diagram of a gapless locking clamp;
Fig. 4: the invention discloses a structural schematic diagram of an I-shaped locking rod in a gapless locking clamp.
The drawings are marked: 1. the locking clamp comprises a locking clamp body, wherein the locking clamp body is provided with an I-shaped locking rod, a locking rod driving screw, a screw locking check ring and a slotted cone end fastening screw; 6. a moving guide rail; 7. locking the fixture fixing hole; 8. a cylindrical opening.
Detailed Description
For a further understanding of the invention, its features and advantages, reference is now made to the following examples, which are illustrated in the accompanying drawings in which:
as shown in fig. 1 to 4, a gapless locking clamp comprises a locking clamp body 1, an i-shaped locking rod 2, a locking rod driving screw 3 and a screw limiting device.
According to the locking clamp body 1, the thread of the locking rod driving screw 3 is connected with the internal thread of the I-shaped locking rod 2, the locking rod driving screw 3 is rotated to drive the I-shaped locking rod 2 to move towards the closed end or the open end of the locking clamp body 1 through thread transmission, the locking clamp body 1 is deformed through the movement of the I-shaped locking rod 2 towards the closed end, the central axis of the clamp is bent and deformed, the clamp mouth is closed towards the center until the clamp mouth is contacted with a workpiece to be locked and clamped, the workpiece is clamped in a fixed mode without gaps, and the locking clamp is restored to the original shape through the movement of the I-shaped locking rod 2 towards the open end.
The longitudinal section of the locking clamp body 1 is in a U-shaped structure (namely, a U-shaped structure when transversely placed), and comprises an opening end and a closing end. The opening end of the locking clamp body 1 comprises an upper locking clamp body and a lower locking clamp body, and a clamp mouth is formed between the tops of the upper locking clamp body and the lower locking clamp body; the upper locking clamp body and the lower locking clamp body are respectively provided with a movable guide rail 6 for placing and moving the I-shaped locking rod 2, the movable guide rail 6 is of a T-shaped structure, the width of the movable guide rail 6 is larger than that of the I-shaped locking rod 2, and the I-shaped locking rod 2 can be ensured to move towards the opening end or the closing end of the locking clamp body 1 in the movable guide rail 6; the included angle between the upper surface of the upper locking clamp body and the lower surface of the lower locking clamp body and the horizontal plane is 5 degrees, so that a certain inclination angle is ensured to be convenient for the deformation of the upper locking clamp body and the lower locking clamp body; the upper surface of going up the locking anchor clamps body, be located go up the root position of the locking anchor clamps body is provided with cylindrical opening 8, the lower surface of the locking anchor clamps body down, be located the root position of the locking anchor clamps body down is provided with cylindrical opening 8, does benefit to the open end of locking anchor clamps body 1 takes place deformation. A screw insertion hole for inserting the locking rod driving screw 3 and a locking clamp fixing hole 7 for placing and fixing the locking clamp body 1 are formed in the closed end of the locking clamp body 1. Rectangular through holes for placing the screw locking check rings 4 are formed in the root positions of the upper locking clamp body and the lower locking clamp body in the locking clamp body 1.
The i-shaped locking rod 2 is arranged in the opening end of the locking clamp body 1 and is directly inserted into the moving through hole, namely, two ends of the i-shaped locking rod 2 are respectively positioned in the moving guide rail 6 of the upper locking clamp body and the moving guide rail 6 of the lower locking clamp body, so that the i-shaped locking rod 2 can move along the moving guide rail 6. The I-shaped locking rod 2 is of an I-shaped structure, so that two end faces of the I-shaped locking rod 2 can be clamped on the upper surface of the upper locking clamp body and the lower surface of the lower locking clamp body, and can apply longitudinal acting force to the upper locking clamp body and the lower locking clamp body in the moving process of the I-shaped locking rod 2 to the closed end of the locking clamp body 1, so that the clamping mouth of the locking clamp body 1 is pressed towards the central axis. The surface of the contact part between the I-shaped locking rod 2 and the upper surface of the upper locking clamp body and the lower surface of the lower locking clamp body is of an arc-shaped structure, so that abrasion of the I-shaped locking rod 2 in the moving process on the inclined surface is reduced. A threaded hole is formed in the center of the I-shaped locking rod 2 so as to be connected with the locking rod driving screw 3. The screw limiting device is used for limiting the axial movement of the locking rod driving screw 3, so that the locking rod driving screw 3 can only perform rotary movement in the screw insertion hole. The screw limiting device comprises a screw locking check ring 4 and a slotted cone end set screw 5, and the screw locking check ring 4 is arranged in a rectangular through hole of the locking clamp body 1; the slotted cone end set screw 5 is connected with the threaded hole of the screw locking check ring 4 and is contacted with the locking rod driving screw 3.
The locking rod driving screw 3 adopts a hexagon socket head cap screw. One end of the locking rod driving screw 3 is positioned in the screw insertion hole, the other end of the locking rod driving screw penetrates out of the screw insertion hole, and the locking rod driving screw is inserted into the threaded hole of the I-shaped locking rod 2 through the central hole of the screw locking check ring 4 and is connected with the threaded hole in a matched mode.
When the locking device is used, the I-shaped locking rod 2 is inserted from the upper end of the movable guide rail, and the I-shaped locking rod 2 is rotated to enable the center threaded hole to coincide with the placement direction of the locking rod driving screw 3; the locking rod driving screw 3 is inserted from a screw insertion hole in the locking clamp body 1, the screw locking check ring 4 is placed in through a rectangular through hole in the locking clamp body 1, the locking rod driving screw 3 passes through a central through hole of the screw locking check ring 4, and a threaded part is inserted and placed in a central threaded hole of the I-shaped locking rod 2. The slotted cone end set screw 5 is inserted into the threaded hole of the screw locking check ring 4 and is contacted with the locking rod driving screw 3, so that the locking rod driving screw 3 can only rotate in the screw insertion hole and cannot move towards the two sides of the open end or the closed end.
When the locking clamp works, the inner hexagonal wrench is used for rotating the locking rod driving screw 3 to one side, the I-shaped locking rod 2 moves along with the locking rod driving screw 3 in the movable guide rail 6 to the closed end of the locking clamp body 1 by utilizing threaded transmission, and the clamping mouth of the locking clamp body 1 is pressed towards the central axis until the clamping mouth is firmly contacted with a locked workpiece; when the locking clamp body 1 is loosened, the inner hexagonal wrench is used for rotating to the other side to compress the clamping mouth of the locking clamp body 1 to the central axis, and the I-shaped locking rod 2 is driven to move to the opening end of the locking clamp body 1 in the moving guide rail 6 through screw transmission, so that the locking clamp body 1 is restored to the shape.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the appended claims, which are within the scope of the present invention.
Claims (6)
1. The gapless locking clamp is characterized by comprising a locking clamp body, an I-shaped locking rod and a locking rod driving screw;
The longitudinal section of the locking clamp body is of a U-shaped structure and comprises an opening end and a closing end, the opening end of the locking clamp body comprises an upper locking clamp body and a lower locking clamp body, moving guide rails for placing and moving the I-shaped locking rod are respectively arranged in the upper locking clamp body and the lower locking clamp body, and screw insertion holes for inserting driving screws of the locking rod are formed in the closing end of the locking clamp body;
The I-shaped locking rod is arranged in the opening end of the locking clamp body, and two ends of the I-shaped locking rod are respectively positioned in the movable guide rail of the upper locking clamp body and the movable guide rail of the lower locking clamp body, so that the I-shaped locking rod can move along the movable guide rail; a threaded hole is formed in the center of the I-shaped locking rod;
One end of the locking rod driving screw is positioned in the screw inserting hole, and the other end of the locking rod driving screw penetrates out of the screw inserting hole and is inserted into the threaded hole of the I-shaped locking rod and is connected with the threaded hole in a matched mode, so that when the locking rod driving screw rotates, the I-shaped locking rod can move towards the closed end of the locking clamp body along with the locking rod driving screw through threaded transmission to compress the mouth of the locking clamp body towards the central axis or move towards the opening end of the locking clamp body to enable the locking clamp body to recover the shape;
The I-shaped locking rod is in an I-shaped structure, so that two end faces of the I-shaped locking rod can be clamped on the upper surface of the upper locking clamp body and the lower surface of the lower locking clamp body, and a longitudinal acting force can be applied to the upper locking clamp body and the lower locking clamp body in the process that the I-shaped locking rod moves towards the closed end of the locking clamp body;
The gapless locking clamp further comprises a screw limiting device used for limiting the locking rod driving screw to move in the axial direction, so that the locking rod driving screw can only do rotary movement in the screw inserting hole; the screw limiting device comprises a screw locking check ring and a grooving cone end set screw, the screw locking check ring is arranged at the root positions of the upper locking clamp body and the lower locking clamp body in the locking clamp body, and the locking rod driving screw is inserted into the threaded hole of the I-shaped locking rod through the screw locking check ring; and the slotted cone end set screw is connected with the threaded hole of the screw locking check ring and is contacted with the locking rod driving screw.
2. A slackless locking clip according to claim 1, wherein said movable rail is of a T-shaped configuration, said movable rail having a width greater than a width of said i-shaped locking lever, whereby movement of said i-shaped locking lever in said movable rail toward an open or closed end of said locking clip body is ensured.
3. A gapless locking clamp as claimed in claim 1 wherein the upper surface of said upper locking clamp body and the lower surface of said lower locking clamp body are angled at 5 ° to the horizontal to ensure an angle of inclination to facilitate deformation of said upper locking clamp body and said lower locking clamp body.
4. The gapless locking clamp as claimed in claim 1, wherein the upper surface of the upper locking clamp body is provided with a cylindrical opening at the root position of the upper locking clamp body, and the lower surface of the lower locking clamp body is provided with a cylindrical opening at the root position of the lower locking clamp body, which is beneficial to deformation of the open end of the locking clamp body.
5. A slackless locking clip according to claim 1, wherein a surface of a portion of said i-shaped locking lever contacting an upper surface of said upper locking clip body and a lower surface of said lower locking clip body is of an arcuate configuration to reduce wear of said i-shaped locking lever during movement on an inclined surface.
6. A gapless locking clamp as claimed in claim 1 wherein a locking clamp securing aperture is provided in the closed end of said locking clamp body for securing said locking clamp body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811314658.4A CN109333402B (en) | 2018-11-06 | 2018-11-06 | Gapless locking clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811314658.4A CN109333402B (en) | 2018-11-06 | 2018-11-06 | Gapless locking clamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109333402A CN109333402A (en) | 2019-02-15 |
| CN109333402B true CN109333402B (en) | 2024-05-17 |
Family
ID=65313965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811314658.4A Active CN109333402B (en) | 2018-11-06 | 2018-11-06 | Gapless locking clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109333402B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114393544B (en) * | 2022-01-26 | 2024-02-20 | 浙江优凯实业有限公司 | Automatic riveting machine for high-speed joint dust cover of transmission shaft |
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| DE20316283U1 (en) * | 2003-10-19 | 2004-02-05 | Klann-Spezial-Werkzeugbau-Gmbh | Clamp for securing vibration compensating shaft in IC engine has a grip element to secure the shaft and with clamping wedges to grip between support flanges on the engine housing |
| CN202668125U (en) * | 2012-06-07 | 2013-01-16 | 宁波市锦泰橡塑有限公司 | Four-axis machining center fixture |
| CN203843216U (en) * | 2014-05-30 | 2014-09-24 | 浙江乐客来机械有限公司 | Lathe chuck |
| CN204111101U (en) * | 2014-09-12 | 2015-01-21 | 夏争先 | Elevator locking protecting device |
| CN105881286A (en) * | 2016-05-27 | 2016-08-24 | 吉林大学 | Automobile buckle insertion and extraction force and stress-strain test fixture |
| CN205703886U (en) * | 2016-04-29 | 2016-11-23 | 新昌县儒岙镇诺一机械厂 | Detent mechanism installed by slide rail |
| CN206123462U (en) * | 2016-09-30 | 2017-04-26 | 李丛蓉 | Location locking device floats |
| CN106974458A (en) * | 2017-03-27 | 2017-07-25 | 浙江恒林椅业股份有限公司 | A kind of retaining mechanism |
| CN207771389U (en) * | 2017-12-28 | 2018-08-28 | 天津天门精机科技有限公司 | A kind of instrument main shaft locking device |
| CN209425274U (en) * | 2018-11-06 | 2019-09-24 | 天津大学 | A kind of gapless locking fixture |
-
2018
- 2018-11-06 CN CN201811314658.4A patent/CN109333402B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10040859A1 (en) * | 2000-08-21 | 2002-03-07 | Ingenieur Beratung Ibi | Screw clamp has slide rail for support piece, aligning elements, fixed bracket with clamping surfaces, spindle and handle, and couplings |
| DE20316283U1 (en) * | 2003-10-19 | 2004-02-05 | Klann-Spezial-Werkzeugbau-Gmbh | Clamp for securing vibration compensating shaft in IC engine has a grip element to secure the shaft and with clamping wedges to grip between support flanges on the engine housing |
| CN202668125U (en) * | 2012-06-07 | 2013-01-16 | 宁波市锦泰橡塑有限公司 | Four-axis machining center fixture |
| CN203843216U (en) * | 2014-05-30 | 2014-09-24 | 浙江乐客来机械有限公司 | Lathe chuck |
| CN204111101U (en) * | 2014-09-12 | 2015-01-21 | 夏争先 | Elevator locking protecting device |
| CN205703886U (en) * | 2016-04-29 | 2016-11-23 | 新昌县儒岙镇诺一机械厂 | Detent mechanism installed by slide rail |
| CN105881286A (en) * | 2016-05-27 | 2016-08-24 | 吉林大学 | Automobile buckle insertion and extraction force and stress-strain test fixture |
| CN206123462U (en) * | 2016-09-30 | 2017-04-26 | 李丛蓉 | Location locking device floats |
| CN106974458A (en) * | 2017-03-27 | 2017-07-25 | 浙江恒林椅业股份有限公司 | A kind of retaining mechanism |
| CN207771389U (en) * | 2017-12-28 | 2018-08-28 | 天津天门精机科技有限公司 | A kind of instrument main shaft locking device |
| CN209425274U (en) * | 2018-11-06 | 2019-09-24 | 天津大学 | A kind of gapless locking fixture |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109333402A (en) | 2019-02-15 |
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