CN210938013U - Variable pitch screw tightening mechanism - Google Patents
Variable pitch screw tightening mechanism Download PDFInfo
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- CN210938013U CN210938013U CN201921734932.3U CN201921734932U CN210938013U CN 210938013 U CN210938013 U CN 210938013U CN 201921734932 U CN201921734932 U CN 201921734932U CN 210938013 U CN210938013 U CN 210938013U
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Abstract
The utility model discloses a variable pitch screw tightening mechanism, which is used for tightening a part to be tightened on a workpiece; comprises a base and a plurality of tightening mechanisms; the tightening mechanism comprises a reference tightening mechanism and at least one movable tightening mechanism, and the reference tightening mechanism is fixedly arranged on the base; each movable tightening mechanism is movably arranged on the base and is respectively connected with the power output ends of the linear driving mechanisms which respectively work independently; and under the drive of the respective linear driving mechanism, each movable tightening mechanism can adjust the distance between the corresponding movable tightening mechanism and the reference tightening mechanism by taking the reference tightening mechanism as a reference. Therefore, the utility model discloses can accomplish the screw tightening of various specification model products, very big improvement automatic assembly level, reduce the assemble duration, reduce the equipment cost of change of screwing up equipment production assembly line even.
Description
Technical Field
The utility model relates to a screw tightening mechanism, especially a can adjust screw pitch's tightening device.
Background
Modern developments place ever higher demands on the automation level of the manufacturing industry. Screw tightening is one of the most important assembly processes in the field of automated assembly manufacturing. In order to meet the requirements of the production cycle, a plurality of tightening shafts are generally required to be configured in the screw tightening process, the installation mode of the plurality of tightening shafts is generally fixed, and the distance between the plurality of tightening shafts is not adjustable.
At present, in PACK bags of a plurality of car factories, screws need to be screwed on an upper box body and a lower box body, the beat requirement of a station is very high, and the intervals of the screws need to be kept consistent. The existing distance screw tightening mechanism obviously does not meet the production requirement.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art not enough, a screw up device is provided, its rigidity with one of them tightening mechanism, remaining tightening mechanism position is adjustable, position adjustable tightening mechanism does moment of torsion location and error compensation adjustment for the tightening mechanism of rigidity, screw up (or other treating the tightening fastener, like the bolt etc.) to accomplish the screw of various specification model products, very big improvement automatic assembly level, reduce the assemble duration, the equipment cost of change of tightening equipment production assembly line even has been reduced.
In order to achieve the technical purpose, the utility model adopts the following technical proposal:
a tightening device is used for tightening a part to be tightened on a workpiece; comprises a base and a plurality of tightening mechanisms; the tightening mechanism comprises a reference tightening mechanism and at least one movable tightening mechanism, and the reference tightening mechanism is fixedly arranged on the base; each movable tightening mechanism is movably arranged on the base and is respectively connected with the power output ends of the linear driving mechanisms which respectively work independently; and under the drive of the respective linear driving mechanism, each movable tightening mechanism can adjust the distance between the corresponding movable tightening mechanism and the reference tightening mechanism by taking the reference tightening mechanism as a reference.
As a further improvement of the tightening device, the tightening device further comprises a control system and a CCD visual detector; wherein: the CCD visual detector is fixedly arranged on one side of the base and used for shooting a workpiece and transmitting shot image information to the control system; the control system acquires the distance between each part to be screwed and a reference object according to the image information transmitted by the CCD visual detector, and controls the corresponding movable screwing mechanism to move by controlling the actuation of the linear driving mechanism, so that each screwing mechanism corresponds to the position of each part to be screwed on the workpiece one by one; the reference object is one of the parts to be screwed on the workpiece, the reference screwing mechanism corresponds to the position of the part to be screwed as the reference object, and the reference screwing mechanism can screw the part to be screwed as the reference object.
As a further improvement of the above tightening device, the tightening mechanism is an electric wrench; the number of the electric wrenches is four; each electric wrench is respectively a first electric wrench, a second electric wrench, a third electric wrench and a fourth electric wrench; the first electric wrench is a reference screwing mechanism, and the second electric wrench, the third electric wrench and the fourth electric wrench are movable screwing mechanisms; the number of the linear driving mechanisms is three, and each linear driving mechanism is a first linear driving mechanism, a second linear driving mechanism and a third linear driving mechanism; the power output end of the first linear driving mechanism is connected with the second electric wrench; the power output end of the second linear driving mechanism is connected with a fourth electric wrench; and the power output end of the third linear driving mechanism is connected with a third electric wrench.
As a further improvement of the tightening device, a first electric wrench is fixedly mounted on the base; the second electric wrench is arranged on the first sliding plate; the first sliding plate is connected with the power output end of the first linear driving mechanism and can slide along a linear guide rail a laid on the base; the laying direction of the linear guide rail a is parallel to the linear driving direction of the first linear driving mechanism; the fourth electric wrench is arranged on the second sliding plate; the second sliding plate is connected with the power output end of the second linear driving mechanism and can slide along a linear guide rail a laid on the base;
the third electric wrench is arranged on the third sliding plate; the third sliding plate is connected with the power output end of the third linear driving mechanism and can slide along a linear guide rail b laid on the second sliding plate; the laying direction of the linear guide rail b is parallel to the linear driving direction of the third linear driving mechanism.
As a further improvement of the above tightening device, the first linear drive mechanism includes a first servo motor and a first screw mechanism; the first lead screw mechanism comprises a first lead screw, and the first lead screw is arranged on the base and is connected with the power output end of the first servo motor; the first sliding plate is in threaded fit connection with the first lead screw, and the linear guide rail a is parallel to the first lead screw; the second linear driving mechanism comprises a second servo motor and a second screw rod mechanism; the second screw rod mechanism comprises a second screw rod, and the second screw rod is arranged on the base and is connected with the power output end of the second servo motor; the second sliding plate is in threaded fit connection with a second lead screw, and the axis of the second lead screw and the axis of the first lead screw are arranged in a collinear manner; the third linear driving mechanism comprises a third servo motor and a third screw rod mechanism; the third screw mechanism comprises a third screw, and the third screw is arranged on the base and is connected with the power output end of the third servo motor; the third sliding plate is in threaded fit connection with a third screw rod, and the linear guide rail b is parallel to the third screw rod.
As a further improvement of the tightening device, the number of the CCD visual detectors is two; the two CCD visual detectors are respectively arranged at two ends of the base.
As a further improvement of the above tightening device, the CCD vision detector includes an annular light source and a high power camera; the annular light source is positioned right in front of the high power camera
According to foretell technical scheme, for prior art, the utility model has the advantages of as follows:
the utility model discloses an adjustment is screwed up the displacement of mechanism (portable spanner) on the base of screwing up in the activity in the mechanism (electric spanner), make on interval and the work piece between each electric spanner wait to screw up the interval matching between the part (waiting to screw up the screw), screw (or other the fastener of waiting to screw up, like the bolt etc.) with accomplishing various specification model products and screw up, very big improvement automatic assembly level, reduce the assemble duration, the equipment change cost of screwing up equipment production assembly line even has been reduced.
Further, the utility model discloses CCD visual inspection appearance has still been adopted to realize that position adjustable screws up the mechanism and does the moment of change location and error compensation for the mechanism of screwing up of rigidity, during then the adjustment, adopts CCD visual inspection appearance shooting work piece earlier to image information transmission to control system who will shoot, control system acquires the interval between waiting to screw up the screw on the work piece according to image information, and adjusts the removal of portable spanner on the base with this. Therefore, the utility model discloses can further improve automatic assembly level, reduce the assemble duration.
Drawings
Fig. 1 is a front view of the present invention;
fig. 2 is a plan view of the present invention.
In fig. 1-2: 1. a high power camera of the first CCD visual detector; 2. an annular light source of the first CCD visual detector; 3. a first electric wrench; 4. a second electric wrench; 5. a third electric wrench; 6. a fourth electric wrench; 7. a high power camera of a second CCD visual detector; 8. an annular light source of the second CCD visual detector; 9. a first servo motor; 10. a coupler a; 11. a first lead screw; 12. a linear guide rail a; 13. a first slide plate; 14. a second lead screw; 15. a base plate; 16. a coupler b; 17. a second servo motor; 18. a third servo motor; 19. a coupler c; 20. a third lead screw; 21. a second slide plate; 22. a third slide plate; 23. and a linear guide rail b.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Unless specifically stated otherwise, the relative arrangement of the components and steps, expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may also be oriented in other different ways (rotated 90 degrees or at other orientations).
As shown in fig. 1 and 2, the tightening device of the present invention is used for tightening a component to be tightened (a fastener such as a screw or a bolt) on a workpiece, and includes a base, a tightening mechanism, a control system, and a CCD vision detector; wherein:
the tightening mechanism comprises a reference tightening mechanism and at least one movable tightening mechanism, and the reference tightening mechanism is fixedly arranged on the base; each movable tightening mechanism is movably arranged on the base and is respectively connected with the power output ends of the linear driving mechanisms which respectively work independently; and under the drive of the respective linear driving mechanism, each movable tightening mechanism can adjust the distance between the corresponding movable tightening mechanism and the reference tightening mechanism by taking the reference tightening mechanism as a reference.
In the utility model, the tightening mechanism can be an electric wrench, at the moment, one of the electric wrenches is a fixed wrench and is fixedly arranged on the base, and the rest electric wrenches are movable wrenches and are movably arranged on the base; each movable wrench is connected with the power output end of the corresponding linear driving mechanism.
The CCD visual detector is fixedly arranged on one side of the base and used for shooting a workpiece and transmitting shot image information to the control system;
the control system acquires the distance between each screw to be screwed and a reference object according to the image information transmitted by the CCD visual detector, and controls the corresponding movable spanner to move by controlling the actuation of the linear driving mechanism, so that each electric spanner corresponds to the position of each screw to be screwed on the workpiece one by one; the reference object is one of the screws to be screwed on the workpiece, and the fixed wrench corresponds to the position of the screw to be screwed on the reference object.
The accompanying drawings disclose in detail one embodiment of the present invention. The tightening device is a four-axis tightening device and is used for tightening the screw of the upper box body and the lower box body in the power battery PACK line. Wherein:
the base comprises a bottom plate 15;
the number of the electric wrenches is four, and each electric wrench is a first electric wrench 3, a second electric wrench 4, a third electric wrench 5 and a fourth electric wrench 6; the first electric wrench 3 is a fixed wrench, and the second electric wrench 4, the third electric wrench 5 and the fourth electric wrench 6 are movable wrenches. The number of the linear driving mechanisms is three, and each linear driving mechanism is a first linear driving mechanism, a second linear driving mechanism and a third linear driving mechanism.
The first electric wrench 3 is fixed to the base.
The second electric wrench 4 is arranged on the first sliding plate 13; the first sliding plate 13 is connected with the power output end of the first linear driving mechanism and can slide along the linear guide rail a12 laid on the base; the laying direction of the linear guide rail a12 is parallel to the linear driving direction of the first linear driving mechanism; the first linear driving mechanism comprises a first servo motor 9 and a first lead screw mechanism; the first lead screw mechanism comprises a first lead screw, and a first lead screw 11 is arranged on the base and is connected with the power output end of the first servo motor 9; the first slide plate 13 is connected with the first lead screw 11 in a threaded fit manner, and the linear guide rail a12 is parallel to the first lead screw 11.
The fourth electric wrench 6 is installed on the second sliding plate 21; the second sliding plate 21 is connected with the power output end of the second linear driving mechanism and can slide along a linear guide rail a12 laid on the base; the second linear driving mechanism comprises a second servo motor 17 and a second lead screw 14 mechanism; the second lead screw 14 mechanism comprises a second lead screw 14, and the second lead screw 14 is arranged on the base and is connected with the power output end of a second servo motor 17; the second sliding plate 21 is connected with the second lead screw 14 in a threaded fit manner, and the second lead screw 14 and the first lead screw 11 are coaxially arranged.
The third electric wrench 5 is mounted on the third sliding plate 22; the third sliding plate 22 is connected with the power output end of the third linear driving mechanism and can slide along a linear guide rail b23 laid on the second sliding plate 21; the laying direction of the linear guide rail b23 is parallel to the linear driving direction of the third linear driving mechanism; the third linear driving mechanism comprises a third servo motor 1 and a third lead screw 20 mechanism; the third screw rod 20 mechanism comprises a third screw rod 20, and the third screw rod 20 is arranged on the base and is connected with the power output end of the third servo motor 1; the third slide plate 22 is connected with the third lead screw 20 in a threaded fit manner, and the linear guide rail b23 is parallel to the third lead screw 20.
In order to accurately realize variable-pitch positioning and error compensation, the number of the CCD visual detectors is two, and the two CCD visual detectors are respectively a first CCD visual detector and a second CCD visual detector and are respectively arranged on two sides of the base. The first CCD visual detector and the second CCD visual detector both comprise an annular light source and a high power camera; the annular light source is positioned right in front of the high power camera and can supplement light source for the CCD visual detector during shooting.
Furthermore, the screwing head of each electric wrench is telescopic and can be matched with screws with different screwing heights. When a certain screw is higher, the screwing head is upwards contracted when the electric wrench is pressed down, so that screws with different heights can be screwed, and the normal screwing operation of other screws cannot be influenced.
According to the above technical solution, it can be known that the working principle of the utility model is:
the first servo motor 9 is fixed on the bottom plate 15 through a connecting plate, is connected with the first lead screw 11 through a coupler a10, and guides the first sliding plate 13 to move through the linear guide rail a12 so as to drive the second electric wrench 4 on the first sliding plate 13 to move synchronously, so as to adjust the distance between the first electric wrench 3 and the second electric wrench 4 in a left-right mode.
The second servo motor 17 is fixed on the bottom plate 15 through a connecting plate, is connected with the second lead screw 14 through a coupler b16, and guides the second sliding plate 21 to move through a linear guide rail a12, so as to drive the third electric wrench 5 and the fourth electric wrench 6 to move left and right synchronously, and adjust the distance between the third electric wrench 5 and the fourth electric wrench 6 and the distance between the first electric wrench 3 and the second electric wrench 4.
The third servo motor 18 is fixed on the second sliding plate 21, connected with the third lead screw 20 by using a coupler c19, and guides the third sliding plate 22 to move through the linear guide rail b23 so as to drive the third electric wrench 5 to move left and right, and adjust the distance between the third electric wrench 5 and the fourth electric wrench 6.
The distance between the four screws to be tightened is controlled by memorizing the number of rotations of the servomotor.
The first CCD vision detector and the second CCD vision detector on the left side and the right side form a double-CCD vision detector, and variable-pitch positioning and error compensation can be accurately realized.
The CCD visual detector adopts an annular light source as a supplementary light source, uses a high power camera to receive optical signals, photographs objects at two ends, converts the optical signals into digital signals, and transmits the digital signals to the control system. The control system calculates compensation amount through the distance between the screw and the reference object in the shot picture, and then controls each servo motor to adjust and compensate the distance between the four electric wrenches to be the same as the distance between the four screws needing to be screwed. Has high precision, high efficiency and high stability.
It should be noted that each electric wrench in the present scheme also has a data transmission function, and can upload data collected during screwing to the MES system, such as rotation speed, torque, number of turns, and so on. It is thereby possible to analyze whether there is a situation in which the screw has been screwed or is missing.
In short, start first servo motor, can drive first slide and slide along linear guide a, and then drive second electric spanner and remove along linear guide a, realize the interval adjustment between second electric spanner and all the other each electric spanner.
Start second servo motor, can drive the second slide and slide along linear guide a, and then drive third electric spanner, fourth electric spanner and remove along linear guide a simultaneously, realize the interval adjustment between third electric spanner, fourth electric spanner and all the other each electric spanner.
And starting the third servo motor, namely driving the third sliding plate to slide along the linear guide rail b, and further driving the third electric wrench to slide along the linear guide rail b, so that the distance between the third electric wrench and other electric wrenches is adjusted.
Claims (7)
1. A tightening device is used for tightening a part to be tightened on a workpiece; the device is characterized by comprising a base and a plurality of tightening mechanisms; the tightening mechanism comprises a reference tightening mechanism and at least one movable tightening mechanism,
the datum tightening mechanism is fixedly arranged on the base;
each movable tightening mechanism is movably arranged on the base and is respectively connected with the power output ends of the linear driving mechanisms which respectively work independently;
and under the drive of the respective linear driving mechanism, each movable tightening mechanism can adjust the distance between the corresponding movable tightening mechanism and the reference tightening mechanism by taking the reference tightening mechanism as a reference.
2. The tightening device according to claim 1, further comprising a control system, a CCD vision detector; wherein:
the CCD visual detector is fixedly arranged on one side of the base and used for shooting a workpiece and transmitting shot image information to the control system;
the control system acquires the distance between each part to be screwed and a reference object according to the image information transmitted by the CCD visual detector, and controls the corresponding movable screwing mechanism to move by controlling the actuation of the linear driving mechanism, so that each screwing mechanism corresponds to the position of each part to be screwed on the workpiece one by one; the reference object is one of the parts to be screwed on the workpiece, the reference screwing mechanism corresponds to the position of the part to be screwed as the reference object, and the reference screwing mechanism can screw the part to be screwed as the reference object.
3. The tightening device according to claim 1 or 2, wherein the tightening mechanism is an electric wrench; the number of the electric wrenches is four; each electric wrench is respectively a first electric wrench, a second electric wrench, a third electric wrench and a fourth electric wrench; the first electric wrench is a reference screwing mechanism, and the second electric wrench, the third electric wrench and the fourth electric wrench are movable screwing mechanisms;
the number of the linear driving mechanisms is three, and each linear driving mechanism is a first linear driving mechanism, a second linear driving mechanism and a third linear driving mechanism;
the power output end of the first linear driving mechanism is connected with the second electric wrench; the power output end of the second linear driving mechanism is connected with a fourth electric wrench; and the power output end of the third linear driving mechanism is connected with a third electric wrench.
4. The tightening apparatus according to claim 3, wherein the first electric wrench is fixedly mounted on the base;
the second electric wrench is arranged on the first sliding plate; the first sliding plate is connected with the power output end of the first linear driving mechanism and can slide along a linear guide rail a laid on the base; the laying direction of the linear guide rail a is parallel to the linear driving direction of the first linear driving mechanism;
the fourth electric wrench is arranged on the second sliding plate; the second sliding plate is connected with the power output end of the second linear driving mechanism and can slide along a linear guide rail a laid on the base;
the third electric wrench is arranged on the third sliding plate; the third sliding plate is connected with the power output end of the third linear driving mechanism and can slide along a linear guide rail b laid on the second sliding plate; the laying direction of the linear guide rail b is parallel to the linear driving direction of the third linear driving mechanism.
5. The tightening apparatus according to claim 4, wherein the first linear drive mechanism includes a first servo motor and a first lead screw mechanism; the first lead screw mechanism comprises a first lead screw, and the first lead screw is arranged on the base and is connected with the power output end of the first servo motor; the first sliding plate is in threaded fit connection with the first lead screw, and the linear guide rail a is parallel to the first lead screw;
the second linear driving mechanism comprises a second servo motor and a second screw rod mechanism; the second screw rod mechanism comprises a second screw rod, and the second screw rod is arranged on the base and is connected with the power output end of the second servo motor; the second sliding plate is in threaded fit connection with a second lead screw, and the axis of the second lead screw and the axis of the first lead screw are arranged in a collinear manner;
the third linear driving mechanism comprises a third servo motor and a third screw rod mechanism; the third screw mechanism comprises a third screw, and the third screw is arranged on the base and is connected with the power output end of the third servo motor; the third sliding plate is in threaded fit connection with a third screw rod, and the linear guide rail b is parallel to the third screw rod.
6. The tightening apparatus according to claim 3, wherein the number of the CCD visual detectors is two; the two CCD visual detectors are respectively arranged at two ends of the base.
7. The tightening apparatus according to claim 3, wherein the CCD vision detector includes a ring light source and a macro camera; the annular light source is positioned right in front of the high power camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921734932.3U CN210938013U (en) | 2019-10-16 | 2019-10-16 | Variable pitch screw tightening mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921734932.3U CN210938013U (en) | 2019-10-16 | 2019-10-16 | Variable pitch screw tightening mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210938013U true CN210938013U (en) | 2020-07-07 |
Family
ID=71370489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921734932.3U Active CN210938013U (en) | 2019-10-16 | 2019-10-16 | Variable pitch screw tightening mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210938013U (en) |
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2019
- 2019-10-16 CN CN201921734932.3U patent/CN210938013U/en active Active
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