CN210525759U - Mode locking hydro-cylinder that semi-ring band-type brake formula was connected - Google Patents
Mode locking hydro-cylinder that semi-ring band-type brake formula was connected Download PDFInfo
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- CN210525759U CN210525759U CN201920862955.6U CN201920862955U CN210525759U CN 210525759 U CN210525759 U CN 210525759U CN 201920862955 U CN201920862955 U CN 201920862955U CN 210525759 U CN210525759 U CN 210525759U
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Abstract
A mold locking oil cylinder with semi-ring contracting brake type connection comprises a pull rod, a mold locking oil cylinder barrel, a mold locking oil cylinder rear cover, a piston, two semi-ring nuts and an anti-loosening gland; the rear cover is fixed at the rear part of the mode locking oil cylinder barrel to form an oil cylinder body of the mode locking oil cylinder; the piston is arranged in the inner cavity of the mold locking oil cylinder barrel, and the pull rod penetrates through the piston after penetrating through the mold locking oil cylinder barrel; the tail part of the pull rod is provided with an annular groove, correspondingly, the inner surfaces of the two half ring nuts are respectively provided with annular teeth, and the annular teeth can be inserted into the annular groove of the pull rod to be occluded; the semi-ring nut is further provided with a through hole, the anti-loosening gland is also provided with a through hole, the piston is provided with a fixing screw hole, and the anti-loosening gland and the semi-ring nut are connected to the piston through a screw, the through hole and the fixing screw hole. The utility model has the advantages that: the tooth surface connecting stress of the semi-ring nut and the pull rod is dispersed and small, and the assembly is convenient.
Description
Technical Field
The utility model relates to a mode locking hydro-cylinder of injection molding machine.
Background
A pull rod in a mold locking oil cylinder of the conventional two-plate injection molding machine is also used as a mold locking piston rod, and a piston is directly in threaded connection with the end part of the pull rod, wherein the piston is provided with a common M thread, a trapezoidal thread or a special thread.
The existing threaded connection has the following defects:
1. the thread structure has a high stress concentration: in the normal working process of the injection molding machine, the action of the deformation force of the pull rod in each mode locking process is from the contact of the mold to the peak value after locking, and the action is from small to large; and opening the mold is vice versa. The cross section of the pull rod is subjected to alternating stress, the stress concentration coefficient of the root of the thread is high, and fatigue failure is easy to generate, so that the pull rod is broken at an early stage. To eliminate stress concentrations, it is generally necessary to increase root fillets and the like, but the improvement is limited by thread size.
2. The threads are subjected to additional bending stresses: as shown in fig. 1, when the injection molding machine is locked, the stationary platen is deformed, causing the cylinder tube mounted on the stationary platen to rotate together with the piston. Because there are gaps between the oil cylinder barrel 2 and the pull rod 1, and between the piston 4 and the pull rod 1, the torque is finally transmitted to the thread engaging surface 40 of the piston and the pull rod, and the thread additionally bears bending stress. The thread part bears great pure tensile stress, and the maximum tensile stress of the thread root is obviously increased by the combined stress in addition to the bending stress, so that the possibility of structural damage at the thread part is increased.
3. The assembly precision of screw thread requires highly: the piston with large mass has no special tool, and the tooth surface damage is likely to occur in the assembling process.
4. The manufacturing precision of the thread is high: for example, the processing difficulty such as tooth form angle, thread pitch tolerance, pitch diameter size and the like is high, and small manufacturing defects in the production process often cause early crack initiation, so that the quality control requirement is high, and the requirements are not easy to meet.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome prior art's the aforesaid not enough and provide a mode locking hydro-cylinder that semi-ring band-type brake formula is connected, make its stress even and little, make and simple to operate.
The utility model provides a technical scheme that above-mentioned problem adopted does: a mold locking oil cylinder with semi-ring contracting brake type connection comprises a pull rod, a mold locking oil cylinder barrel, a mold locking oil cylinder rear cover, a piston, two semi-ring nuts and an anti-loosening gland; the rear cover is fixed at the rear part of the mode locking oil cylinder barrel to form an oil cylinder body of the mode locking oil cylinder; the piston is arranged in the inner cavity of the mold locking oil cylinder barrel, and the pull rod penetrates through the piston after penetrating through the mold locking oil cylinder barrel; the tail part of the pull rod is provided with an annular groove, correspondingly, the inner surfaces of the two half ring nuts are respectively provided with annular teeth, and the annular teeth can be inserted into the annular groove of the pull rod to be occluded; the semi-ring nut is further provided with a through hole, the anti-loosening gland is also provided with a through hole, the piston is provided with a fixing screw hole, and the anti-loosening gland and the semi-ring nut are connected to the piston through a screw, the through hole and the fixing screw hole.
Preferably, the front part of the anti-loosening gland is provided with a groove, and the tail end of the pull rod is arranged in the groove, so that the anti-loosening gland can better fix the pull rod.
Preferably, the inner hole annular teeth of the half-ring nut can also be used for triangular teeth, trapezoidal teeth and saw-shaped teeth.
More specifically, the inner hole annular teeth of the half-ring nut can be one tooth or multiple teeth, and correspondingly, the annular groove can be one or more.
Preferably, the annular groove bottom adopts large fillet transition, particularly preferably, the fillet R of the groove bottom is greater than or equal to 1/2 groove width, so that the stress concentration is obviously reduced.
Compared with the prior art, the utility model has the advantages of:
1. the ring-shaped teeth between the half-ring nut and the pull rod are connected, the half-ring nut is connected to the piston by the anti-loosening gland, and the front end and the rear end of the two half-ring nuts can be used for guiding, so that the tooth surfaces of the half-ring nut and the pull rod are not influenced by the deformation of the template and only are subjected to pure tensile force, and the stress is uniform.
2. Compared with threads, the processing of the annular groove of the semi-ring nut is relatively simple, the semi-ring nut only needs to be buckled during assembly, the installation is very convenient, and the surface precision is not influenced by the assembly.
Drawings
FIG. 1 is a schematic structural diagram of a mold clamping cylinder of a conventional injection molding machine.
Fig. 2 is an overall structure schematic diagram of the mold locking oil cylinder in the embodiment of the present invention.
Detailed Description
The present invention will be further explained with reference to the drawings and the embodiments.
As shown in fig. 2, the mold locking cylinder with half ring contracting brake type connection comprises a pull rod 1, a mold locking cylinder barrel 2, a mold locking cylinder rear cover 3, a piston 4, two half ring nuts 5 and an anti-loosening gland 6.
The pull rod 1 is provided with an annular groove 11 at the tail part, and correspondingly, the inner surfaces of the two half-ring nuts 5 are provided with annular teeth 51, and the annular teeth 51 are inserted into the annular groove 11 of the pull rod 1 to be meshed.
The half-ring nut 5 is further provided with a through hole 53, the locking gland 6 is also provided with a through hole 63, the piston 4 is provided with a fixing screw hole 43, and the locking gland 6 and the half-ring nut 5 are connected to the piston 4 through the screw 7, the through hole 63, the through hole 53 and the fixing screw hole 43.
The rear cover 3 is fixed at the rear part of the mode locking oil cylinder barrel 2 through screws to form an oil cylinder body of the mode locking oil cylinder.
The piston 4 is arranged in the inner cavity of the oil cylinder barrel 2, the pull rod 1 penetrates through the middle of the piston 4 after penetrating through the oil cylinder barrel 2, the annular teeth 51 of the two half-ring nuts 5 are buckled into the annular groove 11 at the tail part of the pull rod 1, and the two half-ring nuts 5 are fixed on the piston 4 through the screws 7 and the anti-loosening gland 6, so that the pull rod 1 is fixed on the piston 4.
Furthermore, the front part of the anti-loose gland 6 is provided with a groove 61, and the tail end 12 of the pull rod 1 is arranged in the groove 61, so that the anti-loose gland 6 can better fix the pull rod 1.
The number of the ring-shaped teeth in the present embodiment is 6, and may be one or another number.
The bottom of the annular groove 11 adopts large fillet transition with the fillet R at the groove bottom being greater than or equal to 1/2 groove width, so that the stress concentration is obviously reduced.
When the mode locking oil cylinder works, the pressure in the cavity of the oil cylinder enables the teeth connected with the semi-ring nut 5 and the pull rod 1 to bear axial load, the inner holes at the front end and the rear end of the semi-ring nut and the pull rod are guided, and torque generated on the piston under the influence of the deformation of the template is finally transmitted to the pull rod through the guide sections at the front end and the rear end of the nut instead of being transmitted to the pull rod through the internal tooth surface of the nut, so that the tooth surface is only in a pure stretching state, and the stress is uniform.
Claims (6)
1. The utility model provides a mode locking hydro-cylinder that semi-ring band-type brake formula is connected which characterized in that: the mold locking mechanism comprises a pull rod, a mold locking oil cylinder barrel, a mold locking oil cylinder rear cover, a piston, two semi-ring nuts and an anti-loosening gland; the rear cover is fixed at the rear part of the mode locking oil cylinder barrel to form an oil cylinder body of the mode locking oil cylinder; the piston is arranged in the inner cavity of the mold locking oil cylinder barrel, and the pull rod penetrates through the piston after penetrating through the mold locking oil cylinder barrel; the tail part of the pull rod is provided with an annular groove, correspondingly, the inner surfaces of the two half ring nuts are respectively provided with annular teeth, and the annular teeth can be inserted into the annular groove of the pull rod to be occluded; the semi-ring nut is further provided with a through hole, the anti-loosening gland is also provided with a through hole, the piston is provided with a fixing screw hole, and the anti-loosening gland and the semi-ring nut are connected to the piston through a screw, the through hole and the fixing screw hole.
2. The mold locking oil cylinder for half-ring contracting brake type connection according to claim 1, characterized in that: the front part of the anti-loosening gland is provided with a groove, and the tail end of the pull rod is arranged in the groove.
3. The mold locking oil cylinder for half-ring contracting brake type connection according to claim 1 or 2, characterized in that: the inner hole annular teeth of the half-ring nut are triangular teeth, trapezoidal teeth or saw-shaped teeth.
4. The mold locking oil cylinder for half-ring contracting brake type connection according to claim 1 or 2, characterized in that: the inner hole annular teeth of the half-ring nut are one or more teeth.
5. The mold locking oil cylinder for half-ring contracting brake type connection according to claim 1 or 2, characterized in that: and the annular groove bottom adopts large fillet transition.
6. The mold locking oil cylinder for half-ring contracting brake type connection according to claim 5, characterized in that: the big round angle is a round angle R of the groove bottom, and the groove width is greater than or equal to 1/2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920862955.6U CN210525759U (en) | 2019-06-10 | 2019-06-10 | Mode locking hydro-cylinder that semi-ring band-type brake formula was connected |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920862955.6U CN210525759U (en) | 2019-06-10 | 2019-06-10 | Mode locking hydro-cylinder that semi-ring band-type brake formula was connected |
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| Publication Number | Publication Date |
|---|---|
| CN210525759U true CN210525759U (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920862955.6U Active CN210525759U (en) | 2019-06-10 | 2019-06-10 | Mode locking hydro-cylinder that semi-ring band-type brake formula was connected |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110239046A (en) * | 2019-06-10 | 2019-09-17 | 海天塑机集团有限公司 | A kind of Mode-locking oil cylinder of semi-ring band brake type connection |
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2019
- 2019-06-10 CN CN201920862955.6U patent/CN210525759U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110239046A (en) * | 2019-06-10 | 2019-09-17 | 海天塑机集团有限公司 | A kind of Mode-locking oil cylinder of semi-ring band brake type connection |
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