CN217193381U - Positioning mechanism of exchange workbench - Google Patents
Positioning mechanism of exchange workbench Download PDFInfo
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- CN217193381U CN217193381U CN202220391308.3U CN202220391308U CN217193381U CN 217193381 U CN217193381 U CN 217193381U CN 202220391308 U CN202220391308 U CN 202220391308U CN 217193381 U CN217193381 U CN 217193381U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The utility model discloses a positioning mechanism of an exchange workbench, which comprises a movable positioning groove and a pushing mechanism, wherein the pushing mechanism comprises a cylinder, a fixed seat, a spherical roller and two lever plates; the movable positioning groove is arranged on the exchange workbench, and the fixed seat is arranged on the bed body; when the pushing mechanism works, the spherical roller can extend into the movable positioning groove or leave the movable positioning groove. The two lever plates are symmetrically arranged in front and back, and the air cylinder and the spherical roller are positioned between the two lever plates; the shape of lever plate is triangle-shaped, and the nodical and the cylinder of its two long limits are connected, and lower nodical and fixing base are connected, and the nodical free end that is of higher authority is held, and the setting of sphere gyro wheel is on the free end. The utility model discloses can guarantee change table's positioning accuracy and repeated positioning accuracy. Meanwhile, the load of the air cylinder is reduced, and the equipment cost is reduced; the bending-resistant section coefficient of the pushing piece is high, the rigidity is good, and the operation of the whole mechanism is ensured; the influence of the stroke of the cylinder on the positioning precision is eliminated.
Description
Technical Field
The utility model relates to a laser cutting system field especially relates to a mechanism for guaranteeing change table positioning accuracy and repeated positioning accuracy.
Background
In the process of cutting the material on the workbench by the laser cutting machine, sometimes the machine needs to be stopped to cut the material on the other workbench, and then the uncut material is cut continuously. However, the existing exchange workbench is driven by an alternating current motor speed reducer, is driven by a chain and provides in-place signals by a proximity switch, so that the exchange workbench is poor in positioning precision, namely the positioning error is about +/-3 mm, and cutting gaps cannot be naturally connected, so that waste materials are caused. Experiments prove that the seam is ensured to be free of steps only when the secondary positioning precision of the exchange workbench is within +/-0.15 mm.
In order to solve the problems, most manufacturers push a guide rod by using an air cylinder, and a conical head or a roller at the head of the guide rod is inserted into a slotted hole of a workbench to complete positioning. The disadvantages of this structure are: firstly, the air cylinder is directly connected with the conical head or the roller through the guide rod, so that the horizontal thrust of the conical head or the roller is equal to the thrust of the air cylinder, the thrust of the air cylinder is large, the diameter of the air cylinder is large, the electromagnetic valve and the air supply amount are both greatly increased, and the equipment cost is increased; the roller or the conical head is directly connected with the cylinder through the guide rod, although the guide rod is provided with a sliding bearing, when the cylinder reaches the maximum stroke, the stress point of the guide rod is far away from the fulcrum, and the guide rod is bent after being used for a period of time so that the guide rod cannot retract; thirdly, the roller or the conical head is directly connected with the cylinder and has the same stroke, so that the stroke error of about 1mm existing in the cylinder cannot be eliminated, and the positioning precision is influenced; fourthly, the stroke of gyro wheel or conical head is the same with the stroke of cylinder, because the cylinder stroke of associated mode is shorter, if adopt the choke valve speed governing, will lead to the cylinder speed undersize to appear crawling the phenomenon, if do not adopt the choke valve speed governing, cylinder speed is fast slightly just leads to the direct striking of gyro wheel to destroy the machined surface on the slotted hole, appears gyro wheel or conical head and scrap in advance, shortens the cylinder life-span scheduling problem.
Meanwhile, some manufacturers adopt electromagnets for limiting, for example, chinese patent CN2020224195708 discloses an electromagnetic limiting device for a laser cutting machine exchange workbench, which has the following disadvantages: the accuracy of the electromagnet iron block is poor; the precision of a guide system of the workbench is poor, and the area of a binding surface of the workbench and the electromagnet cannot be ensured; the spring damper also cannot ensure positioning accuracy.
Disclosure of Invention
The utility model aims to solve the problem that a positioning mechanism for guaranteeing change table is provided, it can guarantee change table's positioning accuracy and repeated positioning accuracy. Meanwhile, the load of the air cylinder is reduced, and the equipment cost is reduced; the bending-resistant section coefficient of the pushing piece is high, the rigidity is good, and the operation of the whole mechanism is ensured; the influence of the stroke of the cylinder on the positioning precision is eliminated. In addition, the impact load of the spherical roller to the movable positioning groove is reduced, and the service lives of the spherical roller, the movable positioning groove, the cylinder and the bearing are prolonged.
The utility model discloses a positioning mechanism of an exchange workbench, which comprises a movable positioning groove and a pushing mechanism, wherein the pushing mechanism comprises a cylinder, a fixed seat, a spherical roller and two lever plates; the movable positioning groove is arranged on the exchange workbench, and the fixed seat is arranged on the bed body; when the pushing mechanism works, the spherical roller can extend into the movable positioning groove or leave the movable positioning groove.
Furthermore, the two lever plates are symmetrically arranged in front and back, and the cylinder and the spherical roller are both positioned between the two lever plates; the shape of lever plate is triangle-shaped, and the nodical and the cylinder of its two long limits are connected, and nodical and fixing base are connected down, and the nodical free end that is of higher authority, spherical gyro wheel setting are on the free end.
Further, when the cylinder works, the lever plate is pushed to rotate by taking the fixed seat as a fulcrum, so that the spherical roller enters the notch from the groove edge of the movable positioning groove or leaves the movable positioning groove from the notch along the groove edge.
Furthermore, the reaction force of the spherical roller and the force arm L1 generated by the fixed seat fulcrum are load force arms, the thrust force of the cylinder and the force arm L2 generated by the fixed seat fulcrum are thrust force arms, and the ratio of L1 to L2 is the lever ratio.
Further, the pushing mechanism further comprises three pins; the cylinder, the fixed seat, the spherical roller and the front and the back lever plates are all connected through pins.
Further, the cylinder comprises a fisheye joint, a universal connecting rod and a cylinder body; the piston rod top of cylinder body is connected the every phenomenon of earth connecting rod, and the top of every phenomenon of earth connecting rod is connected the flake and is connected, flake joint and the pin junction below.
Furthermore, the cylinder also comprises a speed regulating valve and a three-position five-way electromagnetic valve; the air inlet and outlet of the cylinder body are respectively provided with a speed regulating valve, and the speed regulating valves are connected with a three-position five-way electromagnetic valve through air pipes.
Furthermore, pushing mechanism still includes deep groove ball bearing, and deep groove ball bearing installs in the fixing base and with round pin axle cooperation.
Furthermore, the included angle between two groove edges of the movable positioning groove is 90 degrees.
The utility model discloses change table's positioning mechanism's advantage is: when the exchange workbench reaches a cutting position, the air cylinder works to push the lever plate to rotate, so that the spherical roller enters the notch from the edge of the movable positioning groove, the exchange workbench is pushed to move transversely, and the positioning accuracy and the repeated positioning accuracy of the exchange workbench are ensured; secondly, 1, thrust F1 of the cylinder is F (L1/L2), the load of the cylinder is reduced due to the fact that the thrust of the cylinder is small, the diameter of the cylinder is reduced, the electromagnetic valve and the air supply amount are both greatly reduced, and equipment cost is reduced; 2. the bending-resistant section coefficient of the lever plate is high, the rigidity is good, and the operation of the whole mechanism is ensured; 3. the lever plate can eliminate the influence of the stroke of the cylinder on the positioning precision; and thirdly, the air comes out from a rod cavity of the air cylinder and passes through the regulating valve, and then the speed of the air cylinder is regulated, so that the movement speed of the roller is optimized, the impact load of the spherical roller on the movable positioning groove is reduced, and the service lives of the spherical roller, the movable positioning groove, the air cylinder and the bearing are prolonged.
Drawings
FIG. 1 is a perspective view of a positioning mechanism of an exchange workbench according to the present invention;
FIG. 2 is a schematic structural view of the positioning mechanism of the present invention (the spherical roller is not in contact with the movable positioning slot);
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic structural view of the positioning mechanism of the present invention (the spherical roller is locked in the movable positioning groove);
FIG. 5 is a schematic view of the lever plate moment arm;
FIG. 6 is a schematic diagram of the stroke relationship of a spherical roller and a cylinder;
fig. 7 is a schematic diagram of the hydraulic system of the exchange workbench of the present invention;
FIG. 8 is a schematic view of the spherical roller not contacting the movable positioning slot;
FIG. 9 is a schematic view of the spherical roller contacting the groove edge of the movable positioning groove;
fig. 10 is a schematic view of the spherical roller being locked in the movable positioning groove.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
As can be seen from fig. 1, 2, 3 and 4, the positioning mechanism of the exchange workbench of the present invention comprises a movable positioning slot 1 and a pushing mechanism, wherein the pushing mechanism comprises a cylinder 4, a fixed seat 2, a spherical roller 7 and two lever plates 3; the movable positioning groove 1 is arranged on the exchange workbench, and the fixed seat 2 is arranged on the bed body; when the pushing mechanism works, the spherical roller 7 can extend into the movable positioning groove 1 or leave the movable positioning groove 1.
When the exchange workbench drives the material which is not cut for the previous time to come to the cutting position again, the air cylinder 4 works to push the lever plate 3 to rotate, so that the spherical roller 7 enters the notch from the groove edge of the movable positioning groove 1, the exchange workbench is pushed to move transversely, and the positioning precision and the repeated positioning precision of the exchange workbench, namely the position accuracy of the exchange workbench, are ensured; after the cutting of the materials on the exchange workbench is finished, the cylinder 4 pushes the lever plate 3 to rotate, so that the spherical roller 7 leaves the movable positioning groove 1, and the exchange workbench can move to a proper position as required.
Example 2
As can be seen from fig. 1, 2, 3, and 4, the positioning mechanism of the exchange workbench of the present invention: the two lever plates 3 are symmetrically arranged in front and back, and the cylinder 4 and the spherical roller 7 are both positioned between the two lever plates 3; the shape of lever plate 3 is triangle-shaped, and the nodical and cylinder 4 of its two long limits are connected, and lower nodical is connected with fixing base 2, and the nodical free end that is of higher authority, and spherical gyro wheel 7 sets up on the free end.
When the cylinder 4 works, the lever plate 3 is pushed to rotate by taking the fixed seat 2 as a fulcrum, so that the free end is driven to rotate, and the spherical roller 7 enters the notch from the groove edge of the movable positioning groove 1 or leaves the movable positioning groove 1 from the notch along the groove edge.
As shown in fig. 5, the lever plate 3 rotates around the fixing base 2 as a fulcrum to form a lever: the reaction force of the spherical roller 7 and the force arm L1 generated by the fulcrum of the fixed seat 2 are load force arms, the thrust of the cylinder 4 and the force arm L2 generated by the fulcrum of the fixed seat 2 are thrust force arms, and the ratio of L1 to L2 is the lever ratio.
The effect of this lever is: firstly, if the thrust of the spherical roller 7 is F, the thrust F1 of the cylinder 4 is F (L1/L2), that is, the thrust F1 of the cylinder is smaller than the thrust F of the spherical roller, and the small thrust of the cylinder reduces the load of the cylinder, so that the cylinder diameter of the cylinder is reduced, the electromagnetic valve and the air supply amount are both greatly reduced, and the equipment cost is reduced; meanwhile, the lever ratio can be adjusted according to the actual situation so that the cylinder diameter of the cylinder is in a reasonable range; the lever plate 3 has high bending-resistant section coefficient and good rigidity relative to the straight guide rod, and the maximum deformation of the roller 7 is only 7 microns and is far less than +/-0.1 mm in the whole movement process, so that the operation of the whole mechanism is ensured; thirdly, as shown in fig. 6, when the cylinder moves forward by 1mm, the roller only moves by 0.03mm in the vertical direction, namely, the structure of the lever plate can eliminate the influence of the stroke of the cylinder on the positioning precision; therefore, only the positioning end point needs to be arranged near the uppermost end of the trajectory circle of the pin 9 at the lower end, and the influence caused by the stroke error of the cylinder is negligible, thereby improving the positioning accuracy.
Example 3
As can be seen from fig. 1, 2, 3 and 4, the positioning mechanism of the exchange workbench of the present invention: the pushing mechanism also comprises three pins 9; the cylinder 4, the fixed seat 2, the spherical roller 7 and the front and the back lever plates 3 are all connected through a pin 9.
Two front and back lever plates 3 in the pushing mechanism are integrated with the cylinder 4, the fixed seat 2 and the spherical roller 7 through a pin 9, and the lever plates 3 rotate around the fixed seat 2 under the pushing of the cylinder 4.
Example 4
As can be seen from fig. 1, 2, 3 and 4, the positioning mechanism of the exchange workbench of the present invention: the cylinder 4 comprises a fisheye joint, a universal connecting rod and a cylinder body; the piston rod top of cylinder body connects the universal connecting rod, and the top of universal connecting rod connects the flake joint, and the flake joint is connected with pin 9 below.
The motion trail of the piston rod of the cylinder body is round due to the universal connecting rod, and the fisheye joint is added, so that the trail of the right lower part of the lever is round, and the rotation of the lever is guaranteed.
Example 5
As can be seen from fig. 7, the positioning mechanism of the exchange workbench of the present invention: the cylinder 4 also comprises a speed regulating valve 6 and a three-position five-way electromagnetic valve 5; the air inlet and the air outlet of the cylinder body are respectively provided with a speed regulating valve 6, and the speed regulating valves 6 are connected with a three-position five-way electromagnetic valve 5 through air pipes.
The air comes out of the rod chamber of the cylinder 4 and its speed is adjusted by the adjusting valve 6: because the stroke of the cylinder 4 in the structure is lengthened, the speed can be controlled by the speed regulating valve 6, and the speed converted to the speed of the roller 7 can be smooth and slow, so that the movement speed of the roller 7 is optimized, the impact load of the spherical roller 7 on the movable positioning groove 1 is reduced, and the service lives of the spherical roller 7, the movable positioning groove 1, the cylinder and the bearing are prolonged.
Example 6
As can be seen from fig. 1, 2, 3, and 4, the positioning mechanism of the exchange workbench of the present invention: the pushing mechanism further comprises a deep groove ball bearing 8, and the deep groove ball bearing 8 is installed in the fixing seat 2 and matched with the pin shaft 9.
When the cylinder 4 works, the piston rod of the cylinder extends out or retracts to push the bottom of the lever plate 3 to rotate, the lever plate 3 enables the pin shaft 9 to rotate around the fixed seat 2 through the deep groove ball bearing 8, and therefore the contact or separation of the spherical roller 7 and the movable positioning groove 1 is achieved.
Example 7
As can be seen from fig. 1, 3, and 4, the positioning mechanism of the exchange workbench of the present invention: the included angle between the two groove edges of the movable positioning groove 1 is 90 degrees.
The 90-degree included angle of the movable positioning groove enables the thrust of the spherical roller 7 to be perpendicular to the groove edge, and therefore the horizontal pushing of the movable workbench is achieved.
The utility model discloses change table's positioning mechanism's working procedure as follows: as shown in fig. 2, the cylinder 4 pushes the lever plate 3 to rotate around the fixed seat 2, when the spherical roller 7 contacts the movable positioning slot 1, the pushing force of the cylinder 4 is converted into a component force of the spherical roller 7 to push the exchange workbench to move, and the exchange workbench stops after the piston rod reaches the top end, as shown in fig. 4, at this time, the exchange workbench reaches a specified position, and the solenoid valve returns to the middle position for pressure maintaining. Specifically, the method comprises the following steps: when the exchange workbench comes to the cutting position and stops moving, the position is random at the moment; then the cylinder 4 starts to work, and the spherical roller 7 in the initial state does not contact the movable positioning groove 1, as shown in fig. 8; when the spherical roller 7 contacts the movable positioning groove 1, as shown in fig. 9, the exchange workbench starts to move; when the piston rod of the air cylinder 4 reaches the top of the cylinder, the mechanism stops moving, and the spherical roller 7 contacts with the notch of the movable positioning groove 1, as shown in fig. 10, and the positioning is finished. If the exchange workbench needs to leave, the air cylinder 4 works, and the piston rod of the air cylinder retracts until the spherical roller 7 leaves the movable positioning groove 1.
Claims (9)
1. Positioning mechanism of change table, characterized by: the device comprises a movable positioning groove (1) and a pushing mechanism, wherein the pushing mechanism comprises a cylinder (4), a fixed seat (2), a spherical roller (7) and two lever plates (3); the movable positioning groove (1) is arranged on the exchange workbench, and the fixed seat (2) is arranged on the bed body; when the pushing mechanism works, the spherical roller (7) can extend into the movable positioning groove (1) or leave the movable positioning groove (1).
2. The positioning mechanism of claim 1, wherein: the two lever plates (3) are symmetrically arranged in front and back, and the cylinder (4) and the spherical roller (7) are positioned between the two lever plates (3); the shape of lever board (3) is triangle-shaped, and the nodical and cylinder (4) of its two long limits are connected, and nodical and fixing base (2) are connected down, and the nodical free end that is of higher authority, spherical gyro wheel (7) setting are on the free end.
3. The positioning mechanism of claim 1, wherein: when the cylinder (4) works, the lever plate (3) is pushed to rotate by taking the fixed seat (2) as a fulcrum, so that the spherical roller (7) enters the notch from the groove edge of the movable positioning groove (1) or leaves the movable positioning groove (1) from the notch along the groove edge.
4. The positioning mechanism as set forth in claim 1, wherein: the reaction force of the spherical roller (7) and the force arm L1 generated by the fulcrum of the fixed seat (2) are load force arms, the thrust of the cylinder (4) and the force arm L2 generated by the fulcrum of the fixed seat (2) are thrust force arms, and the ratio of L1 to L2 is the lever ratio.
5. The positioning mechanism of claim 1, wherein: the pushing mechanism also comprises three pins (9); the cylinder (4), the fixing seat (2), the spherical roller (7) and the front and the back lever plates (3) are connected through a pin (9).
6. The positioning mechanism of claim 1, wherein: the cylinder (4) comprises a fisheye joint, a universal connecting rod and a cylinder body; the piston rod top of cylinder body is connected with the universal connecting rod, and the top of universal connecting rod is connected with the flake and is connected with pin (9) below.
7. The positioning mechanism of claim 6, wherein: the cylinder (4) also comprises a speed regulating valve (6) and a three-position five-way electromagnetic valve (5); a speed regulating valve (6) is respectively installed on the air inlet and the air outlet of the cylinder body, and the speed regulating valve (6) is connected with a three-position five-way electromagnetic valve (5) through an air pipe.
8. The positioning mechanism of claim 1, wherein: the pushing mechanism further comprises a deep groove ball bearing (8), and the deep groove ball bearing (8) is installed in the fixing seat (2) and matched with the pin shaft (9).
9. The positioning mechanism of claim 1, wherein: the included angle between the two groove edges of the movable positioning groove (1) is 90 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220391308.3U CN217193381U (en) | 2022-02-25 | 2022-02-25 | Positioning mechanism of exchange workbench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220391308.3U CN217193381U (en) | 2022-02-25 | 2022-02-25 | Positioning mechanism of exchange workbench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217193381U true CN217193381U (en) | 2022-08-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220391308.3U Active CN217193381U (en) | 2022-02-25 | 2022-02-25 | Positioning mechanism of exchange workbench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217193381U (en) |
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2022
- 2022-02-25 CN CN202220391308.3U patent/CN217193381U/en active Active
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