CN109676553B - Radial displacement tensioning device for cam - Google Patents
Radial displacement tensioning device for cam Download PDFInfo
- Publication number
- CN109676553B CN109676553B CN201910039299.4A CN201910039299A CN109676553B CN 109676553 B CN109676553 B CN 109676553B CN 201910039299 A CN201910039299 A CN 201910039299A CN 109676553 B CN109676553 B CN 109676553B
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- tensioning
- cam
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- positioning shaft
- positioning
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- 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
- B25B11/02—Assembly jigs
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Transmission Devices (AREA)
Abstract
The invention belongs to the field of aviation assembly process equipment, and relates to a radial displacement tensioning device for a cam. The device comprises a positioning support, a positioning shaft, a cam tensioning mandrel, a gasket, a lock nut, a guide tensioning key and a steel wire retainer ring; the positioning support is cylindrical and is fixed on the assembly type rack for supporting; the positioning shaft is provided with 6 radial grooves, and a stepped through hole is formed in the positioning shaft; the outer cylindrical surface of the cam tensioning mandrel is provided with 6 radial cambered surface grooves which are aligned with radial grooves on the positioning shaft; the guide tensioning keys are arranged in 6 radial grooves of the positioning shaft, and two ends of the guide tensioning keys are clamped by steel wire check rings; the cam tensioning mandrel is rotated to push out and fall back the guiding tensioning key along the radial groove; the lock nut is used for locking and fixing a product, and the gasket is arranged between the lock nut and the product. The invention realizes that the radial dimension of the positioning shaft has larger adjustment quantity, accurate positioning and reliable clamping, and the positioning shaft is not contacted with the product when being pulled out, thereby ensuring the surface quality of the product.
Description
Technical Field
The invention belongs to the field of aviation assembly process equipment, and relates to a radial displacement tensioning device for a cam.
Background
In the field of aviation assembly, whether a military aircraft or a civil aircraft exists, a large number of special-shaped parts with hole characteristics are required to be ensured to be in correct theoretical positions through assembly tools, and generally, the requirements of coaxiality are met. The conventional assembly fixture is ensured by matching the rigid shaft or the elastic expansion shaft structure with the inner hole of the positioned product, but after the position is fixed, assembly stress exists after the assembly is connected with other products, so that stress deformation is generated, and the positioning shaft is difficult to pull out when the products are put down. Although the elastic expansion shaft structure has a certain elastic quantity in the radial direction, the elastic expansion shaft structure is insufficient for overcoming the deformation quantity caused by the assembly stress.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the radial displacement tensioning device for the cam, which can realize accurate positioning and reliable clamping, and simultaneously ensure that the radial dimension of a positioning shaft is reduced enough to overcome the deformation caused by assembly stress when a product is put down, namely, the radial dimension of the positioning shaft can be changed in a large range. Therefore, the product is easy to put down, and the positioning shaft is not contacted with the product when being pulled out, so that the product is prevented from being scratched.
The technical scheme of the invention is as follows:
the radial displacement tensioning device for the cam comprises a positioning support 1, a positioning shaft 2, a cam tensioning mandrel 3, a gasket 4, a locking nut 5, a guiding tensioning key 6 and a steel wire retainer ring 7;
the positioning support 1 is cylindrical and is fixed on the assembly type rack for supporting, and the left end face of the positioning support 1 is used for positioning the end face of the product 8;
the positioning shaft 2 penetrates into the positioning support 1 from the right side, and 6 radial grooves are formed in the outer cylindrical surface of the left extending end and are used for installing the guiding tensioning key 6; the positioning shaft 2 is internally provided with a stepped through hole, the left side is provided with a large-diameter hole section, and the right side is provided with threads; the cam tensioning mandrel 3 is a stepped shaft, 6 radial cambered surface grooves are formed in the outer cylindrical surface of the left large-diameter section, external threads are formed in the right small-diameter section, the tail end of the small-diameter section is a rotating shaft section, the cam tensioning mandrel 3 penetrates through the large-diameter hole end of the positioning shaft 2, the small-diameter section is in threaded connection with the small-diameter hole section of the positioning shaft 2, and the rotating shaft section aligns the 6 radial cambered surface grooves of the cam tensioning mandrel 3 with the 6 radial grooves on the positioning shaft through threaded transmission;
the lower surface of the guide tensioning key 6 is in a cam arc shape, the upper surface of the guide tensioning key is in an arc shape, the guide tensioning key is arranged in 6 radial grooves of the positioning shaft 2 and slides up and down along the radial grooves, and two ends of the guide tensioning key are clamped by steel wire check rings 7 to prevent the guide tensioning key from sliding axially; the upper surfaces of the 6 guide tensioning keys 6 form a cylindrical surface with precision in a tensioning state, the cylindrical surface is matched with an inner hole of a product 8 and is tensioned, the lower surfaces of the guide tensioning keys and the circular arc grooves of the cam tensioning mandrel 3 form high-pair transmission to realize the conversion of axial displacement and radial displacement, namely the cam tensioning mandrel 3 is rotated to realize the push-out and fall-back of the guide tensioning keys 6 along radial grooves; the lock nut 5 is in threaded connection with the leftmost end of the positioning shaft 2 and used for locking and fixing a product 8, and the gasket 4 is arranged between the lock nut 5 and the product 8.
Rotating the cam tensioning mandrel 3 to push out the guiding tensioning key 6 along the radial groove of the positioning shaft 2, and calibrating the cylindrical surface size formed by the guiding tensioning key 6 to be the matching size of the inner hole of the positioned product 8 by using a micrometer; the product 8, the gasket 4 and the lock nut 5 are sequentially installed; the cam tensioning mandrel 3 is rotated forwards, the guide tensioning key 6 is pushed out, tensioning force is applied to the product 8, and the product 8 is compressed and positioned; when the product is assembled and put down, the cam tensioning mandrel 3 is rotated backwards, the guide tensioning key 6 falls into the arc groove low point of the cam tensioning mandrel 3 under the elastic action of the steel wire check ring 7, the lock nut 5 and the gasket 4 are dismounted, the product 8 is pulled out, and smooth putting down of the product 8 is realized.
The invention has the beneficial effects that:
the radial dimension of the positioning shaft is adjusted in a large range, accurate positioning and reliable clamping are realized, meanwhile, the product is easy to put down, the positioning shaft is not contacted with the product when pulled out, and the surface quality of the product is ensured.
Drawings
FIG. 1 is a schematic diagram of a cam radial displacement tensioner;
FIG. 2 is an axial cross-sectional view of a cam-generated radial displacement tensioner;
FIG. 3 is a radial cross-sectional view of a cam-generated radial displacement tensioner;
in the figure: 1, positioning a support; 2, positioning a shaft; 3, a cam tensioning mandrel; 4, a gasket; 5, locking the nut; 6, guiding a tensioning key; 7, a steel wire retainer ring; 8 products.
Detailed Description
Specific embodiments of the present invention will be further described below with reference to the drawings and the accompanying technical schemes.
As shown in fig. 1, the radial displacement tensioning device for the cam comprises a positioning support 1, a positioning shaft 2, a cam tensioning mandrel 3, a gasket 4, a lock nut 5, a guide tensioning key 6 and a steel wire retainer ring 7;
the positioning support 1 is cylindrical and is fixed on the assembly type rack for supporting, and the left end face of the positioning support 1 is used for positioning the end face of the product 8;
the positioning shaft 2 penetrates into the positioning support 1 from the right side, and 6 radial grooves are formed in the outer cylindrical surface of the left extending end and are used for installing the guiding tensioning key 6; the positioning shaft 2 is internally provided with a stepped through hole, the left side is provided with a large-diameter hole section, and the right side is provided with threads; the cam tensioning mandrel 3 is a stepped shaft, 6 radial cambered surface grooves are formed in the outer cylindrical surface of the left large-diameter section, external threads are formed in the right small-diameter section, the tail end of the small-diameter section is a rotating shaft section, the cam tensioning mandrel 3 penetrates through the large-diameter hole end of the positioning shaft 2, the small-diameter section is in threaded connection with the small-diameter hole section of the positioning shaft 2, and the rotating shaft section aligns the 6 radial cambered surface grooves of the cam tensioning mandrel 3 with the 6 radial grooves on the positioning shaft through threaded transmission;
the lower surface of the guide tensioning key 6 is in a cam arc shape, the upper surface of the guide tensioning key is in an arc shape, the guide tensioning key is arranged in 6 radial grooves of the positioning shaft 2 and slides up and down along the radial grooves, and two ends of the guide tensioning key are clamped by steel wire check rings 7 to prevent the guide tensioning key from sliding axially; the upper surfaces of the 6 guide tensioning keys 6 form a cylindrical surface with precision in a tensioning state, the cylindrical surface is matched with an inner hole of a product 8 and is tensioned, the lower surfaces of the guide tensioning keys and the circular arc grooves of the cam tensioning mandrel 3 form high-pair transmission to realize the conversion of axial displacement and radial displacement, namely the cam tensioning mandrel 3 is rotated to realize the push-out and fall-back of the guide tensioning keys 6 along radial grooves; the lock nut 5 is in threaded connection with the leftmost end of the positioning shaft 2 and used for locking and fixing a product 8, and the gasket 4 is arranged between the lock nut 5 and the product 8.
Rotating the cam tensioning mandrel 3 to push out the guiding tensioning key 6 along the radial groove of the positioning shaft 2, and calibrating the cylindrical surface size formed by the guiding tensioning key 6 to be the matching size of the inner hole of the positioned product 8 by using a micrometer; the product 8, the gasket 4 and the lock nut 5 are sequentially installed; the cam tensioning mandrel 3 is rotated forwards, the guide tensioning key 6 is pushed out, tensioning force is applied to the product 8, and the product 8 is compressed and positioned; when the product is assembled and put down, the cam tensioning mandrel 3 is rotated backwards, the guide tensioning key 6 falls into the arc groove low point of the cam tensioning mandrel 3 under the elastic action of the steel wire check ring 7, the lock nut 5 and the gasket 4 are dismounted, the product 8 is pulled out, and smooth putting down of the product 8 is realized.
In addition to the embodiments described above, other embodiments of the invention are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the invention.
Claims (1)
1. The radial displacement tensioning device for the cam is characterized by comprising a positioning support (1), a positioning shaft (2), a cam tensioning mandrel (3), a gasket (4), a locking nut (5), a guide tensioning key (6) and a steel wire retainer ring (7);
the positioning support (1) is cylindrical and is fixed on the assembly type rack for supporting, and the left end face of the positioning support (1) is used for positioning the end face of the product (8);
the positioning shaft (2) penetrates into the positioning support (1) from the right side, and 6 radial grooves are formed in the outer cylindrical surface of the left extending end and are used for installing the guide tensioning key (6); the positioning shaft (2) is internally provided with a stepped through hole, the left side is provided with a large-diameter hole section, and the right side is provided with threads; the cam tensioning mandrel (3) is a stepped shaft, 6 radial cambered surface grooves are formed in the outer cylindrical surface of the large-diameter section on the left side, external threads are formed in the small-diameter section on the right side, the tail end of the small-diameter section is a rotating shaft section, the cam tensioning mandrel (3) penetrates through the large-diameter hole end of the positioning shaft (2), the small-diameter section is in threaded connection with the small-diameter hole section of the positioning shaft (2), and the rotating shaft section aligns the 6 radial cambered surface grooves of the cam tensioning mandrel (3) with the 6 radial grooves on the positioning shaft through threaded transmission;
the lower surface of the guide tensioning key (6) is in a cam arc shape, the upper surface of the guide tensioning key is in an arc shape, the guide tensioning key is arranged in 6 radial grooves of the positioning shaft (2) and slides up and down along the radial grooves, and two ends of the guide tensioning key are clamped by steel wire check rings (7) to prevent the guide tensioning key from sliding axially; the upper surfaces of the 6 guide tensioning keys (6) form a cylindrical surface with precision in a tensioning state, the cylindrical surface is matched with an inner hole of a product (8) and is tensioned, the lower surfaces of the guide tensioning keys and the circular arc grooves of the cam tensioning mandrel (3) form high-pair transmission to realize the conversion of axial displacement and radial displacement, namely the guide tensioning keys (6) are pushed out and fall back along radial grooves by rotating the cam tensioning mandrel (3);
the locking nut (5) is in threaded connection with the leftmost end of the positioning shaft (2) and is used for locking and fixing a product (8); the gasket (4) is arranged between the lock nut (5) and the product (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910039299.4A CN109676553B (en) | 2019-01-16 | 2019-01-16 | Radial displacement tensioning device for cam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910039299.4A CN109676553B (en) | 2019-01-16 | 2019-01-16 | Radial displacement tensioning device for cam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109676553A CN109676553A (en) | 2019-04-26 |
| CN109676553B true CN109676553B (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910039299.4A Active CN109676553B (en) | 2019-01-16 | 2019-01-16 | Radial displacement tensioning device for cam |
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| CN (1) | CN109676553B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110398190A (en) * | 2019-07-29 | 2019-11-01 | 河北宣化工程机械股份有限公司 | A kind of construction machinery gear box shift fork cubing |
| CN111168441B (en) * | 2020-03-16 | 2024-04-16 | 沈阳飞机工业（集团）有限公司 | Stress-free pressing device |
| US11584528B2 (en) | 2020-09-03 | 2023-02-21 | B/E Aerospace, Inc. | Aircraft trolley retention device |
| CN114473957A (en) * | 2021-12-07 | 2022-05-13 | 河南中光学集团有限公司 | Device for rapidly stopping threads and using method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005041858A1 (en) * | 2005-09-02 | 2007-03-08 | Gladkowski, Gerd | Clamping yoke of rectangular or quadratic shape for predominantly vertical machine tools has 4 to 16 exchangeable module clamping units and 3 different clamping unit sub-assemblies for fastening on adapter plate |
| CN103465204A (en) * | 2013-09-22 | 2013-12-25 | 江苏毅合捷汽车科技股份有限公司 | Tool fixture for installing nozzle ring |
| CN203371062U (en) * | 2013-07-26 | 2014-01-01 | 湖北三江航天万山特种车辆有限公司 | Tensioning taper mandrel |
| CN203655823U (en) * | 2013-12-30 | 2014-06-18 | 上海沃迪自动化装备股份有限公司 | Elastic internal expanding device |
| CN209632863U (en) * | 2019-01-16 | 2019-11-15 | 沈阳飞机工业（集团）有限公司 | A kind of cam generation radial displacement tensioning device |
-
2019
- 2019-01-16 CN CN201910039299.4A patent/CN109676553B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005041858A1 (en) * | 2005-09-02 | 2007-03-08 | Gladkowski, Gerd | Clamping yoke of rectangular or quadratic shape for predominantly vertical machine tools has 4 to 16 exchangeable module clamping units and 3 different clamping unit sub-assemblies for fastening on adapter plate |
| CN203371062U (en) * | 2013-07-26 | 2014-01-01 | 湖北三江航天万山特种车辆有限公司 | Tensioning taper mandrel |
| CN103465204A (en) * | 2013-09-22 | 2013-12-25 | 江苏毅合捷汽车科技股份有限公司 | Tool fixture for installing nozzle ring |
| CN203655823U (en) * | 2013-12-30 | 2014-06-18 | 上海沃迪自动化装备股份有限公司 | Elastic internal expanding device |
| CN209632863U (en) * | 2019-01-16 | 2019-11-15 | 沈阳飞机工业（集团）有限公司 | A kind of cam generation radial displacement tensioning device |
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| CN109676553A (en) | 2019-04-26 |
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