Anti-rotation fastening bolt for die

Abstract

The utility model discloses an anti-rotation fastening bolt for a die, which belongs to the field of dies and comprises a screw, a threaded section is arranged at the bottom of the screw, a bolt head is arranged at the top of the screw, a limiting section is arranged at the bottom of the threaded section, and a reinforcing mechanism for reinforcing and connecting the bolt is arranged in the screw. The reinforcing mechanism comprises a connecting base arranged in the screw, an elastic assembly abutting against the bolt hole wall is arranged on the connecting base and comprises a connecting rod connected with the connecting base, and the end, away from the connecting base, of the connecting rod is sleeved with an ejector head. A spring is arranged at the position, between the ejector head and the connecting base, of the connecting rod in a sleeving mode, and a buffering cushion is arranged in the ejector head. According to the bolt for the mold, after the bolt is tightened, a pre-tightening force can be continuously provided through the reinforcing mechanism, tight contact between connected pieces is ensured, and looseness caused by vibration or temperature change is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to an anti-rotation fastening bolt for molds. Background Art

[0002] A mold is an important tool for manufacturing formed articles in industrial production. It realizes the processing of the article's outer shape by changing the physical state of the formed material. Bolts for molds play a crucial role in the manufacturing and use of molds. The bolts are installed in the mold through welding or threaded holes inside the mold, thereby achieving the function of fixing the mold and ensuring the stability and accuracy of the mold during the production process.

[0003] When the mold is connected and fixed by bolts, due to the large temperature difference change during the use of the mold and obvious thermal expansion and contraction phenomenon, the gap between the bolt and the bolt hole will become larger, resulting in the loosening or even falling off of the bolt, and further causing the bolt to fail to achieve the stable effect on the mold. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem that during the use of the mold, due to the large temperature difference change and obvious thermal expansion and contraction phenomenon, the gap between the bolt and the bolt hole becomes larger, resulting in the loosening or even falling off of the bolt, and further causing the bolt to fail to achieve the stable effect on the mold, and to propose an anti-rotation fastening bolt for molds.

[0005] In order to achieve the above purpose, the utility model adopts the following technology: an anti-rotation fastening bolt for molds, including a screw rod, a threaded section is arranged at the bottom of the screw rod, a bolt head is arranged at the top of the screw rod, a limiting section is arranged at the bottom of the threaded section, and a reinforcing mechanism for bolt reinforcement connection is arranged inside the screw rod.

[0006] As a further description of the above technical solution: the reinforcing mechanism includes a connection seat arranged inside the screw rod, and an elastic component for abutting against the bolt hole wall is arranged on the connection seat.

[0007] As a further description of the above technical solution: the elastic component includes a connecting rod connected to the connection seat, a top head is sleeved at one end of the connecting rod away from the connection seat, a spring is sleeved on the connecting rod at the position between the top head and the connection seat, and a buffer pad is arranged inside the top head;

[0008] A through hole matching with the top head is opened on the screw rod.

[0009] As a further description of the above technical solution: the other end of the connecting rod is provided with a threaded end, and a connecting screw hole matching with the threaded end is opened on the connection seat.

[0010] As a further description of the above technical solution: a limiting block that abuts against the inner wall of the screw is provided at the bottom of the connecting seat, and an operating rod is provided at the top of the connecting seat.

[0011] As a further description of the above technical solution: lubricating grooves arranged along the axial direction of the screw are provided on the screw, and an oil injection hole communicating with the lubricating grooves is provided on the bolt head.

[0012] As a further description of the above technical solution: a hole plug is provided at the middle position of the bolt head, and the top of the hole plug is in the same plane as the top of the bolt head.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present utility model are as follows:

[0014] 1. By providing an elastic top head on the bolt, when the bolt is connected, the top head abuts against the inner wall of the bolt hole. The elastic top head can continuously provide a pre-tightening force after the bolt is tightened, ensuring the close contact between the connected parts and preventing loosening caused by vibration or temperature changes;

[0015] When the bolts on the mold are subjected to external impacts or vibrations, the elastic top head can absorb part of the energy, reduce the direct impact on the bolts and the connected parts, and protect the stability of the entire connection structure;

[0016] 2. Through the oil injection hole and lubricating grooves of the bolt, it is convenient to inject oil and lubricate the bolt after the bolt connection, which can reduce the friction between the bolt and adjacent parts, thereby reducing wear and heat generation and prolonging the service life of the bolt and the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shows a schematic diagram of the overall structure provided according to an embodiment of the present utility model;

[0018] Figure 2 Shows a schematic diagram of a side cross-section provided according to an embodiment of the present utility model;

[0019] Figure 3 Shows a schematic diagram of a front cross-section provided according to an embodiment of the present utility model;

[0020] Figure 4 Shows a schematic diagram of the structure of the reinforcement mechanism provided according to an embodiment of the present utility model;

[0021] Figure 5 Shows a schematic diagram of the structure of the elastic component provided according to an embodiment of the present utility model;

[0022] Figure 6 Shows a schematic diagram of the position of the bolt on the mold provided according to an embodiment of the present utility model.

[0023] Legend:

[0024] 1. Screw; 11. Through hole; 12. Lubricating groove; 2. Thread section; 3. Bolt head; 31. Oil injection hole; 4. Limiting section; 5. Reinforcement mechanism; 51. Connecting seat; 511. Connecting screw hole; 52. Limiting block; 53. Operating rod; 54. Elastic component; 541. Connecting rod; 542. Top head; 543. Spring; 544. Buffer pad; 545. Thread end; 6. Hole plug. Specific implementation mode

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Refer to Figures 1 - 5 , a non-rotating fastening bolt for a mold provided in this embodiment includes a screw 1. A thread section 2 is provided at the bottom of the screw 1, a bolt head 3 is provided at the top of the screw 1, a limiting section 4 is provided at the bottom of the thread section 2, a reinforcement mechanism 5 for bolt reinforcement connection is provided inside the screw 1, a hole plug 6 is provided at the middle position of the bolt head 3, and the top of the hole plug 6 is in the same plane as the top of the bolt head 3.

[0027] In the present invention, the bolt is screwed by using the bolt head 3 in cooperation with a wrench, and the bolt is screwed into the screw hole of the mold through the thread on the thread section 2. The surface of the screw 1 is a smooth device, so that it can fit more closely with the inner wall of the screw hole, improving the stability of the bolt. The limiting section 4 at the bottom of the thread section 2 is flat, improving the local strength and stability of the bolt under specific stress conditions. After the bolt is screwed into the screw hole of the mold, the reinforcement mechanism 5 can cope with the thermal expansion and contraction effects suffered by the screw hole of the mold during temperature changes, ensuring the stability of the bolt connection;

[0028] It should be noted that both the screw 1 and the thread section 2 are hollow structures, which can save materials without affecting the bolt connection strength. The central hole of the bolt can be blocked by the hole plug 6 on the bolt head 3 to prevent foreign objects from entering the central hole of the bolt.

[0029] Specifically, as Figures 2 - 6As shown, the reinforcement mechanism 5 includes a connection seat 51 disposed inside the screw 1. An elastic component 54 is provided on the connection seat 51 and abuts against the wall of the bolt hole. The elastic component 54 includes a connecting rod 541 connected to the connection seat 51. A top head 542 is sleeved on one end of the connecting rod 541 away from the connection seat 51. A spring 543 is sleeved on the connecting rod 541 at a position between the top head 542 and the connection seat 51. A buffer pad 544 is provided inside the top head 542. A through hole 11 adapted to the top head 542 is formed in the screw 1.

[0030] Among them, the connection seat 51 is disposed in the central hole of the bolt. The top head 542 penetrates through the through hole 11 of the screw 1. When the bolt is screwed into the screw hole of the mold, under the extrusion of the inner wall of the screw hole, the top head 542 presses the spring 543, and one end of the connecting rod 541 compresses towards the inside of the top head 542. When the mold expands and contracts due to temperature changes, resulting in an increase in the clearance between the screw hole and the bolt, the top head 542 extends outwards under the action of the spring 543, thereby continuously providing a pre-tightening force to ensure the close contact between the connected parts and prevent loosening caused by vibration or temperature changes.

[0031] It should be noted that the spring 543 and the buffer pad 544 also play a buffering role. When the bolt on the mold is subjected to external impact or vibration, the elastic top head 542 can absorb part of the energy, reduce the direct impact on the bolt and the connected parts, and protect the stability of the entire connection structure.

[0032] Specifically, as Figure 4 and Figure 5 shown, a threaded end 545 is provided at the other end of the connecting rod 541. A connecting screw hole 511 adapted to the threaded end 545 is formed in the connection seat 51. A limiting block 52 abutting against the inner wall of the screw 1 is provided at the bottom of the connection seat 51. An operating rod 53 is provided at the top of the connection seat 51.

[0033] Among them, the convenient disassembly and assembly of the elastic component 54 on the connection seat 51 can be realized through the cooperation of the threaded end 545 and the connecting screw hole 511, so as to facilitate the maintenance, repair and replacement of the elastic component 54. The limiting block 52 plays a limiting role. The limiting block 52 abuts against the inner wall of the central hole of the bolt to ensure the stability of the connection seat 51 inside the bolt. The operating rod 53 is used for the operator to hold, facilitating the taking and operating of the reinforcement mechanism 5.

[0034] Specifically, as Figure 1 and Figure 3 shown, a lubricating groove 12 is formed in the screw 1 along its axial direction, and an oil injection hole 31 communicating with the lubricating groove 12 is formed in the bolt head 3.

[0035] Among them, the oil injection hole 31 and the lubricating groove 12 of the bolt can facilitate oil injection and lubrication after the bolt connection, which can reduce the friction between the bolt and adjacent components, thereby reducing wear and heat generation and extending the service life of the bolt and the mold.

[0036] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. A mold anti-rotation fastening bolt, characterized in that: The invention comprises a screw rod (1), wherein a threaded section (2) is arranged at the bottom of the screw rod (1), a bolt head (3) is arranged at the top of the screw rod (1), a limited position section (4) is arranged at the bottom of the threaded section (2), and a reinforcement mechanism (5) for bolt reinforcement connection is arranged inside the screw rod (1).

2. The anti-rotation fastening bolt for mold according to claim 1, characterized in that: The reinforcing mechanism (5) comprises a connecting seat (51) arranged inside the screw rod (1), and an elastic component (54) abutting against the wall of the bolt hole is arranged on the connecting seat (51).

3. The anti-rotation fastening bolt for mold according to claim 2, characterized in that: The elastic component (54) comprises a connecting rod (541) connected to the connecting seat (51); one end of the connecting rod (541) away from the connecting seat (51) is sleeved with a head (542); a spring (543) is sleeved on the connecting rod (541) at a position between the head (542) and the connecting seat (51); and a buffer pad (544) is arranged inside the head (542); The screw rod (1) is provided with a through hole (11) which matches with the top head (542).

4. The anti-rotation fastening bolt for mold according to claim 3, characterized in that: The other end of the connecting rod (541) is provided with a threaded end (545), and the connecting seat (51) is provided with a connecting screw hole (511) matching with the threaded end (545).

5. A mold anti-rotation fastening bolt according to claim 2, 3 or 4, characterized in that: A limiting block (52) abutting against the inner wall of the screw rod (1) is arranged at the bottom of the connecting seat (51), and an operating rod (53) is arranged at the top of the connecting seat (51).

6. The anti-rotation fastening bolt for mold according to claim 1, characterized in that: The screw rod (1) is provided with a lubrication groove (12) arranged along the axial direction thereof, and the bolt head (3) is provided with an oil injection hole (31) connected to the lubrication groove (12).

7. The anti-rotation fastening bolt for mold according to claim 1, characterized in that: A hole plug (6) is arranged at the middle position of the bolt head (3), and the top of the hole plug (6) and the top of the bolt head (3) are located in the same plane.

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