CN218139488U - Connecting structure of head plate and pull rod of injection molding machine - Google Patents
Connecting structure of head plate and pull rod of injection molding machine Download PDFInfo
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- CN218139488U CN218139488U CN202222171974.9U CN202222171974U CN218139488U CN 218139488 U CN218139488 U CN 218139488U CN 202222171974 U CN202222171974 U CN 202222171974U CN 218139488 U CN218139488 U CN 218139488U
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- pull rod
- hole
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- wall
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Abstract
The utility model discloses a connection structure of first board of injection molding machine and pull rod, including first board, pull rod and nut, the pull rod runs through the through-hole of first board, be formed with first depressed part and second depressed part on the pull rod, be in that one section pull rod body between first depressed part and the second depressed part and form the interlude, the first sunken head board inner wall that is close to of pull rod, the interlude of pull rod at least partially with the through-hole interference fit of first board, the second depressed part of pull rod is in the through-hole of first board, the pull rod is close to that one end free end of second depressed part and is inserted in the nut, the nut is with the through-hole interference fit of first board outer wall. The utility model can prevent the outer surface of the pull rod from being sheared by the inner wall of the head plate to cause abrasion by arranging the first sunken part; through setting up the second depressed part and forming the mode that unloads power district and adopt indirect connection for pull rod tip part does not with first board direct contact, cushions and decomposes the atress, prevents that the pull rod from producing the crackle, thereby prevents the pull rod fracture.
Description
Technical Field
The utility model belongs to the technical field of the injection molding machine, especially, relate to a connection structure of injection molding machine head board and pull rod.
Background
Injection molding, also known as injection molding, is a molding method that combines injection and molding, and is widely used in various industries due to its characteristics of high production efficiency, strong adaptability, etc.
The injection molding machine head plate is connected with four pull rods, the four pull rods run through the head plate of the injection molding machine, in the prior art, the pull rod part in the injection molding machine head plate is connected with the head plate in an interference fit mode, when the injection molding machine performs mold closing action, the injection molding machine head plate can give the pull rod great pressure along the axial center direction of the pull rod, the peripheral surface of the pull rod clinging to the inner wall of the injection molding machine head plate can cause abrasion of the pull rod due to extrusion of the injection molding machine head plate, and the part of the pull rod which is positioned in the injection molding machine head plate and close to the outer wall of the head plate easily causes cracks of the pull rod due to great pressure, and even breaks.
Aiming at the above, the connecting structure of the head plate and the pull rod of the injection molding machine is designed, and the connecting structure has the characteristics of abrasion resistance and difficulty in breaking.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a connection structure of head board and pull rod of injection molding machine for the pull rod has resistance to wears, prevents cracked performance.
In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a connection structure of injection molding machine head board and pull rod, includes head board, pull rod and nut, be equipped with the through-hole on the head board, the pull rod runs through the through-hole of head board, nut and the last through-hole fixed connection of head board, be formed with first depressed part and second depressed part on the pull rod, first depressed part and second depressed part are at the non-tip position of pull rod, and first depressed part and second depressed part are inside sunken and form the groove structure of round along the pole body on the outer peripheral face of pull rod, there is the interval between first depressed part and the second depressed part, and that one section pull rod pole body that is in between first depressed part and the second depressed part forms the interlude, the first depressed part of pull rod is in head board outside and that one end border of interlude is close to the inner wall towards the head board, the interlude of pull rod is at least partly and the through-hole interference fit of head board, the second depressed part of pull rod is in the through-hole of head board, the part except that the interlude does not contact with the through-hole inner wall of head board, the one end interference fit that the second depressed part is close to the nut, the nut freely inserts in the end outer wall in the nut.
Further, above-mentioned connection structure of head board and pull rod of injection molding machine, wherein: the edge of the first concave part, which is contacted with the middle section, is coincided with the outer surface of the inner wall of the head plate, so that the first concave part is close to the inner wall of the head plate.
Further, above-mentioned connection structure of head board and pull rod of injection molding machine, wherein: arc-shaped connecting parts are formed at the connecting parts between the first concave part and the second concave part and the non-concave part of the draw bar body.
Further, above-mentioned connection structure of head board and pull rod of injection molding machine, wherein: the through holes of the head plate comprise a first through hole, a second through hole and a third through hole, the first through hole, the second through hole and the third through hole are sequentially communicated, the first through hole is positioned on the inner wall of the head plate, the third through hole is positioned on the outer wall of the head plate, the second through hole is positioned between the first through hole and the third through hole, and the second through hole is formed between the inner wall of the head plate and the outer wall of the head plate.
Further, above-mentioned connection structure of head board and pull rod of injection molding machine, wherein: the aperture of the second through hole is larger than that of the third through hole, the aperture of the third through hole is larger than that of the first through hole, the middle section of the pull rod is in interference fit with the inner wall of the first through hole, and the nut is in interference fit with the inner wall of the third through hole.
Further, above-mentioned connection structure of head board and pull rod of injection molding machine, wherein: the nut is connected with the pull rod, a circle of extending portion extends along the axial direction of the connected pull rod to form the end portion of the nut connected with the pull rod, the outer diameter of the extending portion is smaller than the outer diameter of the nut, the pull rod is inserted into the nut, and the extending portion of the nut is in interference fit with the inner wall of the third through hole.
The utility model has the advantages that: the utility model can prevent the outer peripheral surface of the pull rod from being sheared by the inner wall of the head plate to cause abrasion by arranging the first sunken part; the stress caused by the vertical direction and eccentricity of the pull rod is buffered and decomposed by arranging the second sunken part and forming a force unloading area; in addition, through pull rod and nut fixed connection to through nut and first board fixed connection, adopt the mode of indirect connection, make pull rod tip part not with first board direct contact, also can reduce the pull rod atress, prevent that the pull rod from producing the crackle, thereby prevent the pull rod fracture, increased the life of pull rod and the stability of injection molding machine.
Drawings
FIG. 1 is a schematic view of the connection of a pull rod to a head plate;
FIG. 2 is a schematic cross-sectional view of the connection structure of the pull rod and the head plate;
FIG. 3 is a schematic view of the tie rod and nut connection;
figure 4 is a schematic cross-sectional view of the head plate.
In the figure: 1. a pull rod; 11. a first recess; 12. a middle section; 13. a second recess; 2. a head plate; 21. an inner side wall through hole; 22. a middle through hole; 23. an outer sidewall through hole; 3. a nut; 31. an engaging portion.
Detailed Description
In order to further understand the contents, features and functions of the present invention, the connecting structure of the head plate and the pull rod of the injection molding machine according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, the connection structure of the head plate and the pull rod of the injection molding machine of the present invention comprises a head plate 2, four pull rods 1 and four nuts 3, through holes are arranged at four corner positions of the head plate 2, the four pull rods 1 respectively penetrate through the four through holes of the head plate 2, the outer free ends of the four pull rods 1 are respectively connected with the four nuts 3, the four nuts 3 are respectively fixedly connected with the four through holes on the head plate 2, a first concave portion 11 and a second concave portion 12 are formed on the pull rod 1, the first concave portion 11 and the second concave portion 12 are located at non-end positions of the pull rod 1, the first concave portion 11 and the second concave portion 12 are both concave structures which are inwards concave on the outer circumferential surface of the pull rod 1 and form a circle along the rod body, a gap is formed between the first concave portion 11 and the second concave portion 12, the section of the rod body of the pull rod 1 between the first concave part 11 and the second concave part 12 forms an intermediate section 13, the first concave part 11 of each pull rod 1 is positioned outside the head plate 1, the edge of one end, close to the intermediate section 13, of the first concave part 11 faces the inner wall of the head plate 11, at least part of the intermediate section 13 of each pull rod 1 is in interference fit with each through hole of the head plate 2, the second concave part 13 of each pull rod 1 is positioned in the through hole of the head plate 2, the second concave part 13 is close to the outer wall of the head plate 2 of the injection molding machine, the part, except the intermediate section 13, of each pull rod 1 is not in contact with the inner wall of the through hole of the head plate 2, the free end, close to the second concave part 13, of each pull rod 1 is inserted into the nut 3, and the nut is in interference fit with the through hole end at the outer wall of the head plate 2.
Preferably, as shown in fig. 2, the edge of the first concave part 11 contacting the middle section 13 coincides with the outer surface of the inner wall of the head plate 2, so that the first concave part 11 is close to the inner wall of the head plate 2, and since the first concave part 11 is concave inwards, the inner wall of the head plate 2 can be prevented from scratching the surface of the pull rod, and the outer circumferential surface of the pull rod 1 can be prevented from being sheared by the inner wall of the head plate 2 to cause abrasion.
As shown in fig. 3, the first and second recesses 11 and 12 are formed with arc-shaped connecting portions at the connecting portions with the non-recessed portion of the draw bar, and the arc-shaped connecting portions of the second recess 12 form a force relief area. The unloading area buffers and decomposes the stress caused by the vertical direction and eccentricity of the pull rod, so that the pull rod 1 can be prevented from being broken.
As shown in fig. 4, the through holes of the head plate 2 include a first through hole 21, a second through hole 22 and a third through hole 23, the first through hole 21, the second through hole 22 and the third through hole 23 are sequentially communicated, the first through hole 21 is located on the inner wall of the head plate 2, the third through hole 23 is located on the outer wall of the head plate 2, the second through hole 22 is located between the first through hole 21 and the third through hole 23, and the second through hole 22 is formed between the inner wall and the outer wall of the head plate 2. The aperture of the second through hole 22 is larger than that of the third through hole 23, the aperture of the third through hole 23 is larger than that of the first through hole 21, the middle section 13 of the pull rod 1 is in interference fit with the inner wall of the first through hole 21, and the part of the pull rod 1 except the middle section 13 is not in contact with the inner wall of the through hole of the head plate 2.
As shown in fig. 2 and 3, the end of the nut 3 connected to the pull rod 1 is formed with a circle of extension 31 extending along the axial direction of the connected pull rod 1, the outer diameter of the extension 31 is smaller than the outer diameter of the nut, the pull rod 1 is inserted into the nut 3, the extension 31 of the nut 3 is in interference fit with the inner wall of the third through hole 23, and in order to match the connection between the nut 3 and the third through hole 23, the aperture of the third through hole 23 is larger than the aperture of the first through hole 21, so that the pull rod 1 is not in direct contact with the through hole of the head plate 2 except for the portion of the middle section 13, the stress on the pull rod can be reduced, the pull rod 1 is prevented from cracking, and the pull rod 1 is prevented from breaking.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a connection structure of first board of injection molding machine and pull rod, includes first board, pull rod and nut, be equipped with the through-hole on the first board, the pull rod runs through the through-hole of first board, its characterized in that: the nut is fixedly connected with a through hole in the head plate, a first concave part and a second concave part are formed in the pull rod, the first concave part and the second concave part are located at the non-end positions of the pull rod, the first concave part and the second concave part are both of a groove structure which is inwards concave on the peripheral surface of the pull rod and forms a circle along the rod body, an interval exists between the first concave part and the second concave part, the rod body between the first concave part and the second concave part forms a middle section, the first concave part of the pull rod is located outside the head plate, the edge of one end, close to the middle section, of the first concave part faces the inner wall of the head plate, at least part of the middle section of the pull rod is in interference fit with the through hole in the head plate, the part, except the middle section, of the pull rod is not in contact with the inner wall of the through hole in the head plate, the free end, close to the second concave part, of the pull rod is inserted into the nut, and the through hole in interference fit with the outer wall of the head plate.
2. A connection structure of a head plate and a pull rod of an injection molding machine according to claim 1, characterized in that: the edge of the first concave part, which is contacted with the middle section, is coincided with the outer surface of the inner wall of the head plate, so that the first concave part is close to the inner wall of the head plate.
3. A connection structure of a head plate and a pull rod of an injection molding machine according to claim 1, characterized in that: arc-shaped connecting parts are formed at the connecting parts between the first concave part and the second concave part and the non-concave part of the draw bar body.
4. A connection structure of a head plate and a pull rod of an injection molding machine according to claim 1, characterized in that: the through holes of the head plate comprise a first through hole, a second through hole and a third through hole, the first through hole, the second through hole and the third through hole are sequentially communicated, the first through hole is positioned on the inner wall of the head plate, the third through hole is positioned on the outer wall of the head plate, the second through hole is positioned between the first through hole and the third through hole, and the second through hole is formed between the inner wall of the head plate and the outer wall of the head plate.
5. A connecting structure of a head plate and a pull rod of an injection molding machine according to claim 4, characterized in that: the aperture of the second through hole is larger than that of the third through hole, the aperture of the third through hole is larger than that of the first through hole, the middle section of the pull rod is in interference fit with the inner wall of the first through hole, and the nut is in interference fit with the inner wall of the third through hole.
6. A connecting structure of a head plate and a pull rod of an injection molding machine according to claim 5, characterized in that: the nut is connected with the end part of the pull rod, a circle of extending part extends along the axial direction of the connected pull rod, the outer diameter of the extending part is smaller than that of the nut, the pull rod is inserted into the nut, and the extending part of the nut is in interference fit with the inner wall of the third through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222171974.9U CN218139488U (en) | 2022-08-17 | 2022-08-17 | Connecting structure of head plate and pull rod of injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222171974.9U CN218139488U (en) | 2022-08-17 | 2022-08-17 | Connecting structure of head plate and pull rod of injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218139488U true CN218139488U (en) | 2022-12-27 |
Family
ID=84550991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222171974.9U Active CN218139488U (en) | 2022-08-17 | 2022-08-17 | Connecting structure of head plate and pull rod of injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218139488U (en) |
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2022
- 2022-08-17 CN CN202222171974.9U patent/CN218139488U/en active Active
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