CN110125670B - Tightening mechanism for double-ended screw and tightening and retracting method - Google Patents
Tightening mechanism for double-ended screw and tightening and retracting method Download PDFInfo
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- CN110125670B CN110125670B CN201910485690.7A CN201910485690A CN110125670B CN 110125670 B CN110125670 B CN 110125670B CN 201910485690 A CN201910485690 A CN 201910485690A CN 110125670 B CN110125670 B CN 110125670B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 19
- 230000009471 action Effects 0.000 claims abstract description 21
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 8
- 210000001503 joint Anatomy 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
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Abstract
The invention discloses a tightening mechanism for a double-head threaded piece and a tightening and retreating method, wherein the tightening mechanism comprises a body and a driving part, the body is provided with a containing cavity, a limiting part is arranged in the containing cavity, and when in tightening action, the driving part is screwed into the containing cavity in a first rotation direction, so that the driving part is fixedly connected with the body in sequence; the limiting part is abutted with the double-head threaded piece; screwing the second end of the double-ended screw into a mounting part; during the retraction operation, the driving part rotates in a second rotation direction, and the driving part is separated from the limiting part in sequence; the body is disengaged from the double-ended screw. The invention at least comprises the following advantages: utilize the spacing to the double-end screw spare in the tightening process for the tightening force is greater than the frictional force of double-end screw spare and product butt joint, accomplishes the action of tightening, utilizes the breaking away from with the double-end screw spare, makes the back force be less than the frictional force of double-end screw spare and product butt joint, accomplishes the back action.
Description
Technical Field
The invention relates to the technical field of fitting installation mechanisms, in particular to a tightening mechanism for a double-head threaded piece and a tightening and retreating method.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
The double-head screw-thread piece is used as a connecting fitting, can fix two relatively independent elements at two ends of the connecting fitting respectively, realizes the relative fixation of the two relatively independent elements, and is applied to various aspects in industrial equipment. Taking a double-head threaded piece as an example, a double-nut screwing method is generally adopted in a tightening mode, and a manual tool is needed, so that time and labor are wasted. In addition, the existing double-head screw tightening tool generally has a complex structure, so that the manufacturing cost is high, and the use stability is poor.
It should be noted that the foregoing description of the background art is only for the purpose of providing a clear and complete description of the technical solution of the present invention and is presented for the convenience of understanding by those skilled in the art. The above-described solutions are not considered to be known to the person skilled in the art simply because they are set forth in the background of the invention section.
Disclosure of Invention
In order to overcome the defects in the prior art, the embodiment of the invention provides a tightening mechanism for a double-head threaded piece and a tightening and retreating method, wherein the limit of the double-head threaded piece in the tightening process is utilized, so that the tightening force is larger than the friction force of the double-head threaded piece in butt joint with a product, the tightening action is completed, and the retreating force is smaller than the friction force of the double-head threaded piece in butt joint with the product by separating from the double-head threaded piece, so that the retreating action is completed.
The embodiment of the application discloses: the tightening mechanism comprises a body and a driving part, wherein the body is provided with a containing cavity penetrating through the first end part and the second end part, a limiting part is arranged in the containing cavity, first threads and second threads which are respectively matched with the driving part and the double-head threaded piece and are respectively positioned on two sides of the limiting part are formed in the inner side wall of the body, the tightening mechanism is provided with a tightening action and a retraction action, during the tightening action, the driving part is used for screwing the first end part of the body into the containing cavity through the first threads in a first screwing direction, so that the driving part is fixedly connected with the body after being abutted with the limiting part, the driving part is used for rotating through the first threads in a first screwing direction after being fixedly connected with the body, so that the second end part of the body is abutted with the double-head threaded piece through the second threads to the limiting part, and the driving part is used for screwing the second end part into the double-head threaded piece through the second threads after being abutted with the limiting part, and the double-head threaded piece is installed in the double-head threaded piece;
when the driving part is in a retreating action, the driving part can rotate relative to the body in a second rotation direction through the first thread until the driving part is separated from the limiting part; the driving part can be fixedly connected with the body through a locking part after being separated from the limiting part; the driving part can rotate in a second rotation direction through the second screw thread after being fixedly connected with the body until the body is separated from the double-head screw thread piece, wherein the second rotation direction is opposite to the first rotation direction.
Further, the driving part comprises a ball screw and a ball screw nut which is arranged on the ball screw in a threaded manner and is fixedly arranged with the body.
Further, the ball screw nut is accommodated in the accommodating groove, and the axis of the ball screw nut is parallel to the extending direction of the accommodating groove.
Further, the locking part comprises a locking screw and a threaded hole formed in the body, and the locking screw penetrates through the ball screw to be matched and locked with the threaded hole.
Further, a disc is sleeved on the ball screw, and a plurality of through holes which respectively correspond to the threaded holes on the body and are used for the screws to penetrate are formed in the disc.
Further, the limiting part comprises a ball filled in the containing cavity, and the ball is in point contact with the driving part and the double-head threaded piece respectively.
Further, the cavity is provided with a first cavity and a second cavity along the connecting line direction of the first end part and the second end part of the body, and the cross section area of the first cavity is larger than that of the second cavity.
Further, the largest cross-sectional area of the sphere is smaller than the cross-sectional area of the first cavity and larger than the cross-sectional area of the second cavity.
The embodiment of the application discloses: a make-up method for a double-ended screw member, comprising the steps of:
threading the double-ended screw member from the first end portion into the mounting member;
The driving part is screwed into the accommodating cavity from the first end part of the body in a first screwing direction through a first thread, so that the driving part is fixedly connected with the body after being abutted with the limiting part;
The driving part is used for rotating in a first rotation direction through the first thread after being fixedly connected with the body, so that the second end part of the body is screwed into the double-head threaded piece through the second thread until the limiting part is abutted against the double-head threaded piece;
the driving part is used for rotating in a first rotation direction after the limiting part is abutted with the double-head threaded piece, so that the second end of the double-head threaded piece is screwed into the mounting part.
The embodiment of the application discloses: a back-off method for a double-ended screw, comprising the steps of:
The driving part can rotate relative to the body in a second rotation direction through the first thread until the driving part is separated from the limiting part;
the driving part can be fixedly connected with the body through a locking part after the driving part is separated from the limiting part;
The driving part can rotate in a second rotation direction through the second screw thread after being fixedly connected with the body until the body is separated from the double-head screw thread piece.
By the technical scheme, the invention has the following beneficial effects:
1. According to the application, the driving part and the limiting part are arranged, so that the driving part sequentially enables the driving part to abut against the limiting part through the first rotation direction in the tightening action process, the limiting part enables the second end part of the double-head threaded piece to abut against, the generated abutting force is ensured to be larger than the friction force of screwing in between the double-head threaded piece and the mounting part, and the tightening action of the double-head threaded piece is further realized;
2. According to the application, the driving part and the limiting part are arranged, and in the retreating process, the driving part rotates in the second rotation direction, so that the driving part is separated from the limiting part in sequence; after the driving part is locked by the locking part, the body is separated from the double-head screw member, and the retraction motion is completed.
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an overall exploded view of an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the overall device structure in an embodiment of the invention;
FIG. 3 is a flowchart of a tightening method in an embodiment of the present invention;
fig. 4 is a flowchart of a rollback method in an embodiment of the invention.
Reference numerals of the above drawings: 1. a body; 2. a cavity; 3. a limit part; 4. a ball screw; 5. a ball screw nut; 6. a locking screw; 7. a disc; 8. a through hole; 101. a first end; 102. a second end; 103. a first thread; 104. a second thread; 201. a first cavity; 202. and a second cavity.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, in the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and to distinguish between similar objects, and there is no order of preference between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
As shown in fig. 1 and 2 in combination, in the present embodiment, a tightening mechanism for a double-ended screw is disclosed, which includes a body 1 having a first end portion 101 and a second end portion 102 that are disposed opposite to each other, and a driving portion. The body 1 is provided with a containing cavity 2 penetrating through the first end 101 and the second end 102, a limit part 3 is arranged in the containing cavity 2, a first thread 103 and a second thread 104 which are respectively matched with the driving part and the double-end threaded piece and are respectively positioned at two sides of the limit part 3 are formed on the inner side wall of the body 1, the tightening mechanism is provided with a tightening action and a retraction action, during the tightening action, the driving part is used for screwing the first end 101 of the body 1 into the containing cavity 2 through the first thread 103 in a first screwing direction so that the driving part is fixedly connected with the body 1 after being abutted against the limit part 3, and after being fixedly connected with the body 1, the driving part is used for rotating in a first screwing direction through the first thread 103 so that the second end 102 of the body 1 is screwed into the double-end threaded piece through the second thread 104 to be abutted against the limit part 3, and the driving part is used for screwing the second double-end threaded piece into the double-end threaded piece after the limit part 3 is abutted against the double-end threaded piece in a first screwing way;
during the retraction operation, the driving part can rotate relative to the body 1 in a second rotation direction through the first thread 103 until the driving part is separated from the limiting part 3; the driving part can be fixedly connected with the body 1 through a locking part after being separated from the limiting part 3; the driving part can rotate in a second rotation direction through the second screw thread 104 after being fixedly connected with the body 1 until the body 1 is separated from the double-head screw member, wherein the second rotation direction is opposite to the first rotation direction.
In the above embodiment, during the tightening operation, the driving portion rotates in the first rotation direction, so that the driving portion sequentially abuts against the limiting portion 3, the limiting portion 3 abuts against the second end 102 of the double-ended screw member, the generated abutting force is ensured to be greater than the friction force of screwing between the double-ended screw member and the mounting component, and the tightening operation of the double-ended screw member is further realized; in the process of backing, the driving part rotates in a second rotation direction, so that the driving part is separated from the limiting part 3 in sequence; after the driving part is locked by the locking part, the body 1 is separated from the double-ended screw member, and the retraction operation is completed.
In this embodiment, the tightening mechanism is disposed in a vertical direction, the driving portion is located at an upper end of the body 1, and the double-ended screw member is located at a lower end of the body 1. Preferably, the stud in this embodiment may be a stud. Specifically, the body 1 has a multi-segment shaft shape, and the sectional area of the shaft ends sequentially decreases along the axial direction of the first end 101 toward the second end 102. The arrangement mode can be suitable for the installation of a follow-up driving part and a locking part through the change of the thickness, and meanwhile, the material can be saved.
In this embodiment, the cavity 2 is in a circular hole shape and extends in the up-down direction; preferably, the cavity 2 is arranged coaxially with the body 1. The first thread 103 is located in the cavity 2 adjacent the first end 101 of the body 1 and the second thread 104 is located in the cavity 2 adjacent the second end 102 of the body 1. The first thread 103 is adapted to the driving part and the second thread 104 is adapted to a stud.
In the present embodiment, the driving unit includes a ball screw 4 and a ball screw nut 5 screwed to the ball screw 4 and fixed to the body 1. Specifically, the ball screw 4 and the ball screw nut 5 are coaxially arranged with the body 1, and the outer side wall of the ball screw nut 5 is embedded in the accommodating cavity 2. The upper end of the ball screw nut 5 extends outwards to form a protrusion for abutting against the end of the body 1, so that the ball screw nut 5 is conveniently fixed on the body 1 through the locking screw 6, and the thread of the ball screw nut 5 for matching with the ball screw 4 is the first thread 103. In the above embodiment, it is preferable that the ball screw nut 5 and the cavity 2 of the body 1 are connected by a clearance fit. One end of the ball screw 4 is screwed into the ball screw nut 5, and the end of the ball screw nut accommodated in the accommodating cavity 2 can move in the up-down direction, so that the ball screw nut can be abutted against or separated from the limiting part 3. In the present embodiment, it is preferable that the ball screw 4 and the stopper 3 are connected by point contact.
In this embodiment, the limiting portion 3 includes a ball filled in the cavity 2, and the ball is in point contact with the driving portion and the double-ended screw member, respectively. The cavity 2 has a first cavity 201 and a second cavity 202 along the direction of connecting the first end 101 and the second end 102 of the body 1, and the cross-sectional area of the first cavity 201 is larger than that of the second cavity 202. Specifically, a step surface perpendicular to the axis of the body 1 is disposed at the transition of the first cavity 201 and the second cavity 202, and the spherical surface of the spherical ball can abut against the edge portion of the step surface under the action of gravity of the spherical ball. In this way, the ball may be made of stainless steel, and may be in a hollow or solid manner, which is not limited and described in this embodiment.
In this embodiment, the locking portion includes a locking screw 6 and a threaded hole provided in the body 1, and the locking screw 6 passes through the ball screw 4 to be locked with the threaded hole in a matching manner. The ball screw 4 is sleeved with a disc 7, and the disc 7 is provided with a plurality of through holes 8 which respectively correspond to the threaded holes in the body 1 and are used for the screws to penetrate. Specifically, a locking block protruding upwards is provided on the surface of the first end 101 of the body 1, and the threaded hole is formed in the locking block and extends in the up-down direction. The through holes 8 are distributed on the disc 7 in a circular array, and eighteen through holes 8 are arranged. The disc 7 rotates synchronously with the ball screw 4, preferably the disc 7 is integrally arranged with the ball screw 4, although in other ways, it is also possible to use a detachable arrangement. The locking process specifically comprises the following steps: when the ball screw 4 rotates to a preset position, the screw passes through the through hole 8 and then is matched with the screw thread on the locking block, so that the disc 7 is locked on the body 1, and the ball screw 4 is fixed relative to the body 1.
As shown in connection with fig. 3, an embodiment of the present application discloses: a make-up method for a double-ended screw member, comprising the steps of:
manually threading the double-ended screw member partially into the mounting member from the first end 101; specifically, the double-ended screw is screwed into the mounting member in the up-down direction;
The driving part is screwed into the accommodating cavity 2 from the first end 101 of the body 1 through a first thread 103 in a first rotation direction, so that the driving part is fixedly connected with the body 1 after being abutted with the limiting part 3; specifically, the second end of the ball screw 4 located outside the body 1 is driven by the pistol drill to rotate, and the first end of the ball screw 4 moves downwards until the end face of the first end of the ball screw 4 abuts against the ball, and an abutting force is applied to the ball;
The driving part is used for rotating in a first rotation direction through the first thread 103 after being fixedly connected with the body 1, so that the second end 102 of the body 1 is screwed into the double-ended screw member through the second thread 104 until the limiting part 3 is abutted against the double-ended screw member; specifically, under the driving of the pistol drill, the ball screw 4 and the body 1 synchronously rotate and move downwards, so that the second thread 104 positioned at the second end 102 of the body 1 is screwed into the second end 102 of the stud until one side of the second end 102 of the stud abuts against the lower part of the ball, and in this step, the friction force between the first end of the stud and the mounting part is greater than the friction force between the first thread 103 of the body 1 and the second end of the stud.
The driving part is used for rotating in a first rotation direction after the limiting part 3 is abutted with the double-head threaded piece, so that the second end of the double-head threaded piece is screwed into the mounting part. Specifically, under the drive of the pistol drill, the ball screw 4, the body 1 and the stud are synchronously rotated until the stud is screwed in place relative to the mounting part, and the tightening action of the stud is completed.
Referring to fig. 4, an embodiment of the present application discloses a retraction method for a double-ended screw member, comprising the steps of:
The driving part can rotate relative to the body 1 in a second rotation direction through the first thread 103 until the driving part is separated from the limiting part 3; specifically, the pistol drill drives the ball screw 4 to move upwards relative to the body 1, in this process, the lower end of the ball screw is separated from the ball, so that the abutting force between the ball and the ball is disappeared, and the abutting force between the ball and the stud is also disappeared correspondingly, in the above steps, the friction force between the first end 101 of the stud and the mounting part is greater than the friction force between the second end 102 of the stud and the second nut on the body 1, and the friction force between the second end 102 of the stud and the second nut on the body 1 is greater than the friction force between the ball screw 4 and the ball screw nut 5;
The driving part can be fixedly connected with the body 1 through a locking part after the driving part is separated from the limiting part 3; specifically, when the ball screw 4 and the body 1 are locked through the locking part when the ball screw rotates to a preset position, so that the ball screw 4 and the body 1 generate torsion in the rotation process of the subsequent pistol drill, and synchronous movement can be realized;
The driving part can be rotated in the second rotation direction by the second screw 104 after being fixedly connected with the body 1 until the body 1 is separated from the double-ended screw member. Specifically, the pistol drill drives the ball screw 4 and the body 1 to synchronously move upwards relative to the stud until the second end 102 of the body 1 is separated from the stud, so as to complete the retraction action; in the above steps, the torque force between the body 1 and the ball screw 4 is greater than the friction force between the second end of the stud and the body 1, the friction force between the first end of the stud and the mounting member, and the friction force between the second end of the stud and the body 1 is less than the friction force between the first end of the stud and the mounting member.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (6)
1. The tightening mechanism is characterized by comprising a body and a driving part, wherein the body is provided with a first end part and a second end part which are oppositely arranged, the body is provided with a cavity penetrating through the first end part and the second end part, a limiting part is arranged in the cavity, the inner side wall of the body is provided with a first thread and a second thread which are respectively matched with the driving part and the double-head threaded part and are respectively positioned at two sides of the limiting part, the tightening mechanism is provided with a tightening action and a retracting action, during the tightening action, the driving part is used for screwing the driving part into the cavity through the first thread in a first rotation direction from the first end part of the body, so that the driving part is fixedly connected with the body after being abutted with the limiting part, and the driving part is used for rotating through the first thread in a first rotation direction after being fixedly connected with the body, so that the second end part of the body is screwed into the limiting part through the second thread to be abutted with the limiting part, and the driving part is used for screwing the double-head threaded part into the limiting part through the second thread to be abutted against the first thread;
When the driving part is in a retreating action, the driving part can rotate relative to the body in a second rotation direction through the first thread until the driving part is separated from the limiting part; the driving part can be fixedly connected with the body through a locking part after being separated from the limiting part; the driving part can rotate in a second rotation direction through the second screw thread after being fixedly connected with the body until the body is separated from the double-head screw thread piece, wherein the second rotation direction is opposite to the first rotation direction;
The driving part comprises a ball screw and a ball screw nut which is arranged on the ball screw in a threaded manner and is fixedly arranged with the body; the locking part comprises a locking screw and a threaded hole arranged on the body, and the locking screw penetrates through the ball screw to be matched and locked with the threaded hole; the ball screw is sleeved with a disc, and a plurality of through holes which correspond to the threaded holes on the body respectively and are used for the screws to penetrate are formed in the disc; the limiting part comprises a ball filled in the containing cavity, and the ball is respectively in point contact with the driving part and the double-head threaded piece.
2. The tightening mechanism for a double-ended screw according to claim 1, wherein the ball screw nut is accommodated in the accommodating chamber, and an axis of the ball screw nut is disposed in parallel with an extending direction of the accommodating chamber.
3. The tightening mechanism for a double-ended screw according to claim 1, wherein the receiving chamber has a first chamber and a second chamber in a direction in which the first end and the second end of the body are connected, and a cross-sectional area of the first chamber is larger than a cross-sectional area of the second chamber.
4. A make-up mechanism for a double-ended screw member according to claim 3, wherein the maximum cross-sectional area of said ball is smaller than the cross-sectional area of said first cavity and larger than the cross-sectional area of said second cavity.
5. A make-up method for a double-ended screw member comprising the make-up mechanism according to any one of claims 1 to 4, characterized by comprising the steps of:
threading the double-ended screw member from the first end portion into the mounting member;
The driving part is screwed into the accommodating cavity from the first end part of the body in a first screwing direction through a first thread, so that the driving part is fixedly connected with the body after being abutted with the limiting part;
The driving part is used for rotating in a first rotation direction through the first thread after being fixedly connected with the body, so that the second end part of the body is screwed into the double-head threaded piece through the second thread until the limiting part is abutted against the double-head threaded piece;
the driving part is used for rotating in a first rotation direction after the limiting part is abutted with the double-head threaded piece, so that the second end of the double-head threaded piece is screwed into the mounting part.
6. A back-off method for a double-ended screw member including the tightening mechanism according to any one of claims 1 to 4, characterized by comprising the steps of:
The driving part can rotate relative to the body in a second rotation direction through the first thread until the driving part is separated from the limiting part;
the driving part can be fixedly connected with the body through a locking part after the driving part is separated from the limiting part;
The driving part can rotate in a second rotation direction through the second screw thread after being fixedly connected with the body until the body is separated from the double-head screw thread piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910485690.7A CN110125670B (en) | 2019-06-05 | 2019-06-05 | Tightening mechanism for double-ended screw and tightening and retracting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910485690.7A CN110125670B (en) | 2019-06-05 | 2019-06-05 | Tightening mechanism for double-ended screw and tightening and retracting method |
Publications (2)
| Publication Number | Publication Date |
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| CN110125670A CN110125670A (en) | 2019-08-16 |
| CN110125670B true CN110125670B (en) | 2024-04-30 |
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| CN201910485690.7A Active CN110125670B (en) | 2019-06-05 | 2019-06-05 | Tightening mechanism for double-ended screw and tightening and retracting method |
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| CN115416540B (en) * | 2022-11-04 | 2023-03-24 | 蓝谷智慧(北京)能源科技有限公司 | Battery unlocking device and battery replacing platform |
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