CN110842817B - Rack and pinion latch device and use method thereof - Google Patents
Rack and pinion latch device and use method thereof Download PDFInfo
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- CN110842817B CN110842817B CN201911160543.9A CN201911160543A CN110842817B CN 110842817 B CN110842817 B CN 110842817B CN 201911160543 A CN201911160543 A CN 201911160543A CN 110842817 B CN110842817 B CN 110842817B
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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
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Abstract
The invention discloses a rack and pinion latch device and a use method thereof, wherein the rack and pinion latch device comprises a mounting block, a rotating shaft, a bearing, a gear, a first rack and a second rack, wherein a first through hole for mounting the rotating shaft, a second through hole for mounting the first rack and the second rack, and a third through hole are formed in the mounting block; the first perforation is spatially perpendicular to the second perforation and the third perforation; 2 key grooves are formed in the rotating shaft, and the gears are respectively fixed on the rotating shaft through flat keys; the rotating shaft is arranged in the first through hole, the first rack is arranged in the second through hole, and the second rack is arranged in the third through hole; the bearings are arranged at the two ends of the rotating shaft; the first rack and the second rack are respectively meshed with the gear; and a locating pin is further arranged at the end part of the first rack. The invention has the advantages of compact structure, accurate bolt, stable and efficient positioning and the like.
Description
Technical Field
The invention relates to the technical field of cylinder block positioning, in particular to a rack and pinion latch device and a using method thereof.
Background
When the engine cylinder body is processed, the cylinder body needs to be conveyed to a tool for positioning and fixing. Before, the cylinder/oil cylinder is used for pushing pins for positioning and fixing, but because of improvement of the process technology, the design of the inner space of the tool is narrow, the cylinder/oil cylinder cannot be installed, and the positioning of the cylinder body is difficult. The cylinder/oil cylinder has the defects that the cylinder/oil cylinder is too large to be installed on a tool, or the cylinder/oil cylinder is too small in size and low in strength. According to the invention, the cylinder/air cylinder can be arranged outside the tool, so that the space of the tool is not occupied, the maintenance is facilitated, the defect of direct bolt connection of the cylinder/air cylinder is overcome, and the bolt positioning precision of the cylinder body is ensured.
The foregoing background is only for the purpose of facilitating an understanding of the principles and concepts of the invention and is not necessarily in the prior art to the present application and is not intended to be used as an admission that such background is not entitled to antedate such novelty and creativity by the present application without undue evidence prior to the present application.
Disclosure of Invention
The invention aims to provide a rack and pinion bolt device which has compact structure, accurate bolt and high efficiency in work.
Preferably, the present invention may further have the following technical features:
the rack and pinion pin device comprises a mounting block, a rotating shaft, a bearing, a gear, a first rack and a second rack, wherein a first through hole for mounting the rotating shaft, a second through hole for mounting the first rack and the second rack, and a third through hole are formed in the mounting block; the first perforation is spatially perpendicular to the second perforation and the third perforation; 2 key grooves are formed in the rotating shaft, and the gears are respectively fixed on the rotating shaft through flat keys; the rotating shaft is arranged in the first through hole, the first rack is arranged in the second through hole, and the second rack is arranged in the third through hole; the bearings are arranged at the two ends of the rotating shaft; the first rack and the second rack are respectively meshed with the gear; and a locating pin is further arranged at the end part of the first rack.
The guide device comprises a guide cylinder, a guide rod, a spring and a guide sleeve, wherein 2 guide pins which are oppositely arranged are arranged on the inner wall of the guide cylinder, 2 guide rings which are oppositely arranged are arranged on the outer side of the guide cylinder, and the guide sleeve is fixed at the right end of the guide cylinder; the left end of the guide rod is fixed on the mounting block, and the right end of the guide rod penetrates through the guide ring; the spring is sleeved on the guide rod, and two ends of the spring are respectively abutted with the mounting block and the guide ring; guide grooves matched with the guide pins are formed in two sides of the first rack.
Further, the outer diameter of the guide sleeve is the same as that of the guide cylinder, the left end of the guide sleeve is connected with the right end of the guide cylinder, and the inner hole of the guide sleeve is a taper hole and gradually becomes smaller from left to right.
Further, one end of the locating pin is a threaded section, and the other end of the locating pin is a cone matched with the guide sleeve.
Further, the side wall of the right part of the guide sleeve is provided with 3 open grooves.
Further, the guide sleeve is made of steel; the guide sleeve is in threaded connection with the guide cylinder.
Further, counter bores are formed at two ends of the first perforation, and an inner groove for assembling a spring retainer ring is formed in the inner wall of the counter bore; the diameter of the bearing is larger than the diameter of the gear.
Further, the first rack and the second rack are cylindrical racks, and the outer sides of the racks are divided into toothed racks and cylinders.
Further, the first through hole, the second through hole and the third through hole are mutually perpendicular in space.
The application method of the rack and pinion latch device comprises the following steps:
s1: after the bolt device is assembled, the bolt device is fixed to a designated position through a connecting rod, and the end part of the second rack is connected with the power device; the power device is an air cylinder or an oil cylinder, the air cylinder shrinkage state is taken as the initial state of the bolt device, at the moment, the air cylinder rod is shrunk, the first rack is positioned at the left end of the movement stroke of the first rack, the guide groove presses the guide pin through the right side wall to extrude the guide cylinder towards the direction of the mounting block, and the spring is stressed to generate elastic force for restoring the guide cylinder to the original position;
s2: after the cylinder body is in place, starting the cylinder, stretching the cylinder rod to push the second rack to drive the rotating shaft to rotate through the gear and enable the first rack to move rightwards, inserting the guide sleeve into the connecting hole of the cylinder body after stretching the cylinder for a certain length, at the moment, enabling the spring force to be zero, continuously stretching the cylinder to push the first rack to move rightwards, separating the guide pin from the right side wall of the guide groove, and enabling the positioning pin to be inserted into the inner hole of the guide sleeve, so that the positioning of the cylinder body is realized;
s3: after the cylinder body is machined, starting the cylinder, slowly shrinking the cylinder, displacing the first rack leftwards, extracting the locating pin from the guide sleeve, and when the right side wall of the guide groove on the first rack is abutted against the guide pin again, displacing the guide cylinder leftwards and extracting the guide sleeve from the cylinder body connecting hole, and after the cylinder rod is shrunk in place, returning the first rack and the guide cylinder to an initial state to complete a working cycle; the latch device enters a ready state for positioning the next cylinder block.
Compared with the prior art, the invention has the beneficial effects that:
1) The cylindrical rack is adopted, so that the friction force between the cylindrical rack and the second perforation and the third perforation is small, and the cylindrical rack is more beneficial to the back and forth movement of the cylindrical rack in the perforation;
2) The guide device is arranged, so that the working rigidity of the positioning pin can be improved, and the positioning stability is improved;
3) The positioning pin and the guide sleeve are matched and positioned, and a conical matching mode is adopted, so that the cylinder block connecting hole is effectively adapted to be bigger or smaller; the positioning pin and the guide sleeve are in conical fit, and even if the positioning pin and the guide sleeve are tightly connected due to the fact that the connecting hole of the cylinder body is smaller, the conical connection mode can also be used for rapidly extracting the positioning pin;
drawings
Fig. 1 is a partial schematic view of the present invention (to show a guide device).
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a perspective view of fig. 1.
Fig. 4 is a schematic structural view of the present invention.
Fig. 5 is a cross-sectional view of the guide of the present invention.
Fig. 6 is a top view of the guide of the present invention.
Fig. 7 is a perspective view of the guide sleeve of the present invention.
Detailed Description
The invention will be described in further detail with reference to the following detailed description and with reference to the accompanying drawings. It should be emphasized that the following description is merely exemplary in nature and is in no way intended to limit the scope of the invention or its applications.
Non-limiting and non-exclusive embodiments will be described with reference to the following drawings, in which like reference numerals refer to like elements unless otherwise specified.
The rack and pinion latch device as shown in fig. 1-7 comprises a mounting block 101, a rotating shaft 4, bearings (5, 11) and gears (7, 9), wherein a first through hole for mounting the rotating shaft 4, a second through hole for mounting a first rack 10 and a second rack 1 and a third through hole are formed in the mounting block 101, and a plurality of connecting holes for fixing the mounting block 101 are further formed in the mounting block 101. For the convenience of installing the bearings (5, 11), counter bores are arranged at two ends of the first perforation, and inner grooves are formed in the inner walls of the counter bores for assembling spring retainer rings (3, 12). The first perforation is spatially perpendicular to the second perforation and the third perforation. 2 key grooves are formed in the rotating shaft 4, and gears (7, 9) are respectively fixed on the rotating shaft 4 through flat keys (6, 8). Then, the rotating shaft 4 provided with the gears (7, 9) is installed in the first perforation, the positions of the 2 gears (7, 9) are positioned at the communication positions of the first perforation, the second perforation and the third perforation, bearings (5, 11) are respectively installed at two ends of the rotating shaft 4 in place, and spring retainer rings (3, 12) are installed to limit the axial movement of the rotating shaft. In this embodiment, the racks (1, 10) are cylindrical racks, specifically, teeth are formed on the side surfaces of the cylinders, and connecting holes (102, 103) are formed on one end surface of the cylinders and used for connecting the cylinders or the positioning pins 20, so that friction force of the cylindrical racks (1, 10) is small, and the cylindrical racks are more beneficial to moving back and forth in the first perforation and the second perforation. Slowly extending the first rack 10 into the second through hole, so that the teeth on the first rack 10 are meshed with one of the gears 9; similarly, the second rack 1 slowly stretches into the second through hole, so that teeth on the second rack 1 are meshed with the other gear 7, and the three parts of the first rack 10, the second rack 1 and the rotating shaft 4 are linked. Finally, the positioning pin 20 is installed in the connecting hole 102 of the first rack 1, a section of thread section is arranged on the outer side of the positioning pin 20 in order to prevent the positioning pin 20 from falling out of the connecting hole 102, and the positioning pin 20 is fixed in the connecting hole 102 of the first rack 10 in a threaded connection mode.
According to a further improvement of the above technical solution, a guiding device 14 of a first rack is designed, the guiding device 14 comprises a guiding cylinder 142, a guiding rod 141, a spring 145 and a guiding sleeve 144, two opposite vertex positions of the inner wall of the guiding cylinder 142 are respectively provided with a guiding pin 143, two opposite vertex positions on the outer side are welded with a guiding ring 142-1, and the right end of the guiding cylinder 142 is fixed with the guiding sleeve 144. The guide sleeve 144 is of a conical sleeve structure, the left end of the guide sleeve 144 is connected with the right end 142 of the guide cylinder, the inner hole of the guide sleeve 144 is a conical hole, the diameter of the left end hole is gradually smaller from left to right, and the diameter of the left end hole is 2-2.8mm larger than that of the right end hole. The left end of the guide rod 141 is fixed to the mounting block 101, and the right end passes through the guide ring 142-1. The guide sleeve 144 is displaced along the stroke of the guide rod 141 by the guide ring 142-1. The spring 145 is sleeved on the guide rod 141, and two ends of the spring are respectively abutted against the mounting block 101 and the guide ring 142-1 to generate elastic force. Correspondingly, guide grooves 10-1 matched with the guide pins 143 are further formed in the two sides of the first rack 10, and the guide pins 143 are clamped in the guide grooves 10-1 to limit the distance of telescopic displacement of the first rack 10. One end of the positioning pin 143 is a threaded section, and the other end is a cone matched with the guide 144. In actual production, the size of the connecting hole of the cylinder block connecting positioning pin 20 is subject to machining deviation, and although most of the sizes are within the allowable range of the error, part of the connecting hole is larger or smaller. When the connecting hole of the cylinder block is too large, the positioning pin 20 can be quickly inserted into the connecting hole, but cannot effectively stably position the cylinder block; when the connecting hole of the cylinder block is too small, the positioning pin 20 and the connecting hole are too tight or cannot be inserted into the connecting hole, which affects the subsequent process. Therefore, the positioning pin 20 and the guide sleeve 144 are matched and positioned, and the conical matching mode is adopted to effectively adapt to the fact that the connecting hole of the cylinder body is bigger or smaller. The positioning pin 20 and the guide sleeve 144 are in a tapered fit manner, and even if the cylinder block connecting hole is small, the positioning pin 20 and the guide sleeve 144 are tightly connected, the tapered connection manner can rapidly withdraw the positioning pin 20.
More specifically, the guide sleeve 144 is steel. The guide sleeve 144 has a left end having an outer diameter smaller than that of the standard cylinder block connecting hole by 0.5mm and a right end having an outer diameter smaller than that of the standard cylinder block connecting hole by 1mm. The guide sleeve 144 is screw-coupled with the guide cylinder 142, and has 3 open grooves 144-1 formed in a right side wall thereof, and when the cylinder block connecting hole is oversized, the positioning pin 20 can spread the right portion of the guide sleeve 144 and be tightly fitted with the cylinder block connecting hole. The guide pin 143 is preferably a machine screw having a front end formed as a cylinder and a rear end formed as a screw thread, and is screwed to the guide cylinder.
In one of the preferred embodiments of the above-described embodiments, two telescopic rods 142-2 are further provided at the outer vertex of the guide cylinder 142, the right end of the telescopic rod 142-2 is fixed to the guide cylinder 142, and the left end is fixed to the mounting block 101. The 2 guide rods 141 and the 2 telescopic rods 142-2 are just at the four vertexes outside the guide cylinder 142. The telescopic rod 142-2 is matched with the guide rod 141 for use, so that the stability of the guide cylinder 142 can be enhanced, and the guide cylinder 142 is prevented from shaking in the use process. Of course, the telescopic rod 142-2 may be replaced by the guide rod 141, and the guide ring 142-1 may be added to the outside of the guide cylinder 142.
In one of the preferred embodiments of the above-described solution, the diameter of the gear wheel 9 driving the first rack 10 is larger than the diameter of the gear wheel 7 driving the second rack 1.
According to one of the preferred embodiments of the technical scheme, the PLC is used for controlling the telescopic displacement of the cylinder or the oil cylinder, and then the sensing probe is matched for sensing the position of the cylinder body, so that accurate automatic plug pin is realized. The embodiment improves the automation degree of the device, saves labor force and improves production efficiency.
The application method of the rack and pinion latch device comprises the following steps:
s1: after the bolt device is assembled, the bolt device is fixed to a designated position through a connecting rod, and the end part of the second rack 1 is connected with a power device; taking a cylinder as a power device as an example, taking a contracted state of the cylinder as an initial state of the bolt device, at the moment, the cylinder rod is contracted, the first rack 10 is positioned at the left end of the movement stroke of the first rack, the guide groove 10-1 presses the guide pin 143 through the right side wall of the guide groove to press the guide cylinder 142 towards the direction of the mounting block 101, and the spring 145 is stressed to generate elastic force for restoring the guide cylinder 142 to the original position;
s2: after the cylinder body is in place, starting the cylinder, wherein the cylinder rod stretches to push the second rack 1 to drive the rotating shaft 4 to rotate through the gear 7 and enable the first rack 10 to shift rightwards, the guide cylinder 142 is still abutted against the right side wall of the guide groove 10-1 under the action of the elastic force of the spring 145 in the moving process of the first rack 10, after the cylinder stretches for a certain length, the guide sleeve 144 is inserted into the connecting hole of the cylinder body, at the moment, the elastic force of the spring 145 is insufficient to continuously push the guide cylinder 142, the cylinder continues to stretch to push the first rack 10 to continuously shift rightwards, the guide pin 143 is separated from the right side wall of the guide groove 10-1, and the positioning pin 143 is inserted into the inner hole of the guide sleeve 144, so that the positioning of the cylinder body is realized;
s3: after the cylinder body is processed, starting the cylinder, slowly shrinking the cylinder, displacing the first rack 10 leftwards, extracting the positioning pin 143 from the guide sleeve 144, displacing the guide cylinder 142 leftwards and extracting the guide sleeve 144 from the cylinder body connecting hole when the right side wall of the guide groove 10-1 on the first rack 10 is abutted against the guide pin 143 again, and returning the first rack 10 and the guide cylinder 142 to the initial state after the cylinder rod is shrunk in place, so as to complete one working cycle; the latch device enters a ready state for positioning the next cylinder block.
Those skilled in the art will recognize that numerous variations are possible in light of the above description, and that the examples and figures are presented for the purpose of describing one or more particular embodiments only.
While there have been described and illustrated what are considered to be example embodiments of the present invention, it will be understood by those skilled in the art that various changes and substitutions can be made therein without departing from the spirit of the invention. In addition, many modifications may be made to adapt a particular situation to the teachings of the invention without departing from the central concept thereof as described herein. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the invention and equivalents thereof.
Claims (8)
1. The application method of the rack and pinion latch device is characterized by comprising the following steps of: the device comprises a mounting block, a rotating shaft, a bearing, a gear, a first rack and a second rack, wherein a first through hole for mounting the rotating shaft, a second through hole for mounting the first rack and the second rack, and a third through hole are formed in the mounting block; the first perforation is spatially perpendicular to the second perforation and the third perforation; 2 key grooves are formed in the rotating shaft, and the gears are respectively fixed on the rotating shaft through flat keys; the rotating shaft is arranged in the first through hole, the first rack is arranged in the second through hole, and the second rack is arranged in the third through hole; the bearings are arranged at the two ends of the rotating shaft; the first rack and the second rack are respectively meshed with the gear; a positioning pin is further arranged at the end part of the first rack; the guide device comprises a guide cylinder, a guide rod, a spring and a guide sleeve, wherein 2 guide pins which are oppositely arranged are arranged on the inner wall of the guide cylinder, 2 guide rings which are oppositely arranged are arranged on the outer side of the guide cylinder, and the guide sleeve is fixed at the right end of the guide cylinder; the left end of the guide rod is fixed on the mounting block, and the right end of the guide rod penetrates through the guide ring; the spring is sleeved on the guide rod, and two ends of the spring are respectively abutted with the mounting block and the guide ring; guide grooves matched with the guide pins are formed in two sides of the first rack;
the method comprises the following steps: s1: after the bolt device is assembled, the bolt device is fixed to a designated position through a connecting rod, and the end part of the second rack is connected with the power device; the power device is an air cylinder, the air cylinder is in a contracted state as the initial state of the bolt device, at the moment, the air cylinder rod is contracted, the first rack is positioned at the left end of the movement stroke of the air cylinder rod, the guide groove presses the guide pin through the right side wall to extrude the guide cylinder towards the direction of the mounting block, and the spring stress generates elastic force for restoring the guide cylinder to the original position;
s2: after the cylinder body is in place, starting the cylinder, stretching the cylinder rod to push the second rack to drive the rotating shaft to rotate through the gear and enable the first rack to move rightwards, inserting the guide sleeve into the connecting hole of the cylinder body after stretching the cylinder for a certain length, at the moment, enabling the spring force to be zero, continuously stretching the cylinder to push the first rack to move rightwards, separating the guide pin from the right side wall of the guide groove, and enabling the positioning pin to be inserted into the inner hole of the guide sleeve, so that the positioning of the cylinder body is realized;
s3: after the cylinder body is machined, starting the cylinder, slowly shrinking the cylinder, displacing the first rack leftwards, extracting the locating pin from the guide sleeve, and when the right side wall of the guide groove on the first rack is abutted against the guide pin again, displacing the guide cylinder leftwards and extracting the guide sleeve from the cylinder body connecting hole, and after the cylinder rod is shrunk in place, returning the first rack and the guide cylinder to an initial state to complete a working cycle; the latch device enters a ready state for positioning the next cylinder block.
2. A method of using a rack and pinion latch assembly as defined in claim 1, wherein: the guide sleeve is of a conical sleeve structure, the left end of the guide sleeve is connected with the right end of the guide cylinder, and the inner hole of the guide sleeve is a conical hole and gradually becomes smaller from left to right.
3. A method of using a rack and pinion latch assembly as defined in claim 2, wherein: one end of the locating pin is a threaded section, and the other end of the locating pin is a cone matched with the guide sleeve.
4. A method of using a rack and pinion latch assembly as defined in claim 3 wherein: the lateral wall at uide bushing right part has seted up 3 open slots.
5. A method of using a rack and pinion latch assembly as defined in claim 1, wherein: the guide sleeve is made of steel; the guide sleeve is in threaded connection with the guide cylinder.
6. A method of using a rack and pinion latch assembly as defined in claim 1, wherein: counter bores are formed at two ends of the first perforation, and an inner groove for assembling a spring retainer ring is formed in the inner wall of the counter bore; the diameter of the bearing is larger than the diameter of the gear.
7. A method of using a rack and pinion latch assembly as defined in claim 1, wherein: the first rack and the second rack are cylindrical racks, and the outer sides of the racks are divided into toothed racks and cylinders.
8. A method of using a rack and pinion latch assembly as defined in claim 1, wherein: the first perforation, the second perforation and the third perforation are mutually vertical in space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911160543.9A CN110842817B (en) | 2019-11-23 | 2019-11-23 | Rack and pinion latch device and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911160543.9A CN110842817B (en) | 2019-11-23 | 2019-11-23 | Rack and pinion latch device and use method thereof |
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| Publication Number | Publication Date |
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| CN110842817A CN110842817A (en) | 2020-02-28 |
| CN110842817B true CN110842817B (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911160543.9A Active CN110842817B (en) | 2019-11-23 | 2019-11-23 | Rack and pinion latch device and use method thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111687769B (en) * | 2020-07-06 | 2022-04-22 | 广西玉柴机器股份有限公司 | Step-by-step positioner of camshaft gear and signal disc phase position locating pin |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2544392B2 (en) * | 1987-07-23 | 1996-10-16 | 豊田工機株式会社 | Positioning device for knock pin in workpiece tightening jig |
| CN201091988Y (en) * | 2007-08-24 | 2008-07-30 | 比亚迪股份有限公司 | Pin inserting-drawing mechanism |
| CN203141135U (en) * | 2013-03-14 | 2013-08-21 | 广西玉柴机器股份有限公司 | Device for preventing tooth-bar type locating pin from loosing and sliding down |
| CN106150239A (en) * | 2015-04-14 | 2016-11-23 | 宋华 | A kind of automatic pinning assembly |
| CN109013794B (en) * | 2018-10-15 | 2023-06-16 | 江阴博衍机械设备有限公司 | Intelligent bushing mouth multipoint flattening device capable of preventing bushing from being separated |
| CN211249755U (en) * | 2019-11-23 | 2020-08-14 | 广西玉柴机器股份有限公司 | Rack and pinion bolt device |
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