Sealing and stretching device for bottle blowing machine

Abstract

The sealing stretching device for the bottle blowing machine comprises a stretching support, a stretching mechanism and a driving mechanism, the stretching mechanism comprises a stretching seat and a stretching rod, the stretching seat comprises a sliding side plate and a mounting top plate, a threaded mounting hole is formed in the mounting top plate from top to bottom in a penetrating mode, and a threaded connecting column is fixedly arranged at the lower end of the stretching rod. The diameter of the threaded connecting column is smaller than that of the stretching rod, a blocking shoulder is formed between the threaded connecting column and the stretching rod, the threaded connecting column is connected into the threaded mounting hole in a threaded mode, the threaded connecting column is sleeved with an anti-loosening spring, the upper end of the anti-loosening spring abuts against the blocking shoulder, and the lower end of the anti-loosening spring abuts against the mounting top plate. The anti-loosening spring applies upward elastic force to the stretching rod through the retaining shoulder, so that the upper side of the external thread of the bolt connecting column abuts against the lower side of the internal thread of the thread mounting hole, the purpose of preventing the thread from loosening is achieved, and the use stability of the stretching device is not prone to being affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to bottle blowing machine assembly, in particular to a kind of sealing stretch device for bottle blowing machine. BACKGROUND

[0002] At present, the Chinese patent with announcement No.CN207273840U discloses a kind of full-automatic plastic bottle blowing machine servo motor stretching mechanism, including stretching support, stretching structure and drive structure.The stretching support includes upper support plate, lower support plate being arranged in parallel below the upper support plate, support rod connecting the upper support plate and the lower support plate.The stretching structure includes stretching plate being arranged between the upper support plate and the lower support plate, stretching rod being arranged on the stretching plate.The drive structure includes servo motor being arranged below the stretching support, connecting shaft gear being arranged in the output end of the servo motor, rack being arranged in the lower end of the stretching plate, the connecting shaft gear is engaged with the rack.However, in the above-mentioned stretching mechanism, lifting rod is only connected with stretching plate by nut, with the increase of use time, the nut used to fix stretching rod is prone to loosen, which will affect the use stability of the above-mentioned stretching mechanism. SUMMARY

[0003] Therefore, the utility model aims at providing a kind of sealing stretch device for bottle blowing machine, it has the advantage that use stability is not easily affected.

[0004] In order to solve the above-mentioned technical problem, the technical scheme of the utility model is: a kind of sealing stretch device for bottle blowing machine, including stretching support, stretching mechanism and drive mechanism, the stretching mechanism includes stretching seat and stretching rod, the stretching seat includes sliding side plate and installation top plate, the sliding side plate is slidably connected with the stretching support by slide rail, the installation top plate is fixedly arranged in the upper end of the sliding side plate, the installation top plate is provided with threaded mounting hole from top to bottom, the lower end of the stretching rod is fixedly provided with threaded connecting column, the diameter of the threaded connecting column is less than the diameter of the stretching rod, the threaded connecting column and the stretching rod form stop shoulder, the threaded connecting column is screw-connected in the threaded mounting hole, the outer side of the threaded connecting column is equipped with anti-loosening spring, the upper end of the anti-loosening spring is abutted with the stop shoulder, the lower end of the anti-loosening spring is abutted with the installation top plate.

[0005] By the technical scheme, the anti-loose spring applies an upward elastic force to the stretching rod through the shoulder, so that the outer thread upper side of the threaded connecting column abuts against the inner thread lower side of the threaded mounting hole, thereby preventing the threaded connection from loosening, and the use stability of the stretching device is not easily affected. The diameter of the threaded connecting column is smaller than the diameter of the stretching rod, so that the shoulder is formed at the connection between the threaded connecting column and the stretching rod, and the installation of the anti-loose spring is more convenient. The stretching seat is composed of the sliding side plate and the mounting top plate, and less raw materials are required for production.

[0006] Preferably, the stretching rod comprises a stretching inner rod and a stretching outer sleeve, the stretching inner rod is coaxially fixed with the threaded connecting column, the diameter of the stretching inner rod is less than or equal to the diameter of the threaded connecting column, a limiting guide groove is formed on the outer side of the stretching inner rod and is arranged along the axial direction of the stretching inner rod, the stretching outer sleeve is slidably sleeved on the outer side of the stretching inner rod, a limiting protrusion is arranged on the inner side of the stretching outer sleeve and is slidably arranged in the limiting guide groove, the upper end of the anti-loose spring abuts against the stretching outer sleeve, and the anti-loose spring drives the limiting protrusion to abut against the lower end inner groove wall of the limiting guide groove through the elastic force.

[0007] By the technical scheme, the stretching rod is composed of the slidingly arranged stretching inner rod and the stretching outer sleeve, so that in the process of assisting the bottle blank forming, the stretching outer sleeve and the anti-loose spring cooperate with each other to achieve the buffering purpose, and the situation that the bottle blank is damaged is avoided. The limiting guide groove and the limiting protrusion cooperate with each other to limit the sliding stroke of the stretching outer sleeve.

[0008] Preferably, a connecting hole is formed on the side wall of the stretching outer sleeve and is used to communicate with the limiting guide groove, the limiting protrusion comprises a limiting sliding block and a connecting screw, the limiting sliding block is slidably arranged in the limiting guide groove, and the threaded segment of the connecting screw passes through the connecting hole and is threadedly connected with the limiting sliding block.

[0009] By the technical scheme, the limiting protrusion is composed of the limiting sliding block and the connecting screw, so that the assembly of the stretching rod is more convenient.

[0010] Preferably, a buffer rubber ring is sleeved on the outer side of the threaded segment of the connecting screw, and the head of the connecting screw tightly fixes the buffer rubber ring on the outer side wall of the stretching outer sleeve.

[0011] By the technical scheme, the rubber buffer ring can be used to protect the stretching outer sleeve, so that the outer side of the stretching outer sleeve is not easily extruded and deformed by the head of the connecting screw.

[0012] Preferably, the outer side of the stretching inner rod is provided with a positioning groove, the positioning groove is arranged along the axial direction of the stretching inner rod, and the positioning groove is located on the side of the stretching inner rod away from the limiting guide groove. The inner side of the stretching outer sleeve is provided with a positioning protrusion, and the positioning protrusion is slidingly arranged in the positioning groove.

[0013] Through the above technical scheme, the positioning groove and the positioning protrusion cooperate to limit the relative rotation of the stretching inner rod and the stretching outer sleeve. Thus, the anti-loose spring arranged between the stretching outer sleeve and the mounting top plate is not easy to be twisted by the stretching outer sleeve.

[0014] Preferably, the stretching outer sleeve comprises a sliding pipe and a support top cover, and the support top cover is threadedly connected to the inner side of the upper end of the sliding pipe.

[0015] Through the above technical scheme, the stretching outer sleeve is composed of the sliding pipe and the support top cover. Thus, different support top covers can be replaced according to the shape of the bottle blank, so that stable contact between the support top cover and the bottle blank can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Structure diagram of example one Figure 1 ;

[0017] Figure 2 Structure diagram of example one Figure 2 ;

[0018] Figure 3 Sectional view diagram of example two

[0019] Figure 4 A enlarged view of part A of Figure 3 ;

[0020] Figure 5 B enlarged view of part B of Figure 3 .

[0021] Fig. 1 is a sliding rail; Fig. 2 is a stretching support; Fig. 21 is an upper support plate; Fig. 22 is a lower support plate; Fig. 23 is a support rod; Fig. 24 is a side support plate; Fig. 3 is a stretching mechanism; Fig. 31 is a stretching seat; Fig. 311 is a sliding side plate; Fig. 312 is a mounting top plate; Fig. 32 is a stretching rod; Fig. 321 is a stretching inner rod; Fig. 322 is a stretching outer sleeve; Fig. 3221 is a sliding pipe; Fig. 3222 is a support top cover; Fig. 4 is a driving mechanism; Fig. 41 is a servo motor; Fig. 42 is a transmission gear; Fig. 43 is a transmission rack; Fig. 5 is a threaded mounting hole; Fig. 6 is a threaded connecting column; Fig. 7 is a shoulder; Fig. 8 is an anti-loose spring; Fig. 9 is a limiting guide groove; Fig. 10 is a limiting protrusion; Fig. 101 is a limiting sliding block; Fig. 102 is a connecting screw; Fig. 11 is a connecting hole; Fig. 12 is a buffer rubber ring; Fig. 13 is a positioning groove; Fig. 14 is a positioning protrusion; and Fig. 15 is an avoiding through hole. DETAILED DESCRIPTION

[0022] The specific embodiments of the utility model are further described in detail below with reference to the drawings, so that the technical scheme of the utility model is easier to understand and master. Embodiment one

[0023] A sealing and stretching device for a bottle blowing machine, as shown in Figure 1 , Figure 2 , comprises a stretching support 2, a stretching mechanism 3 and a driving mechanism 4.

[0024] The stretching support 2 comprises an upper support plate 21, a lower support plate 22 arranged in parallel below the upper support plate 21, a support rod 23 connecting the upper support plate 21 and the lower support plate 22, and a side support plate 24 connecting the upper support plate 21 and the lower support plate 22, wherein the support rod 23 is parallel to the side support plate 24.

[0025] The stretching mechanism 3 comprises a stretching seat 31 and a stretching rod 32. The stretching seat 31 comprises a sliding side plate 311 arranged vertically and a mounting top plate 312, wherein the sliding side plate 311 is connected to the stretching support 2 through a sliding rail 1, the mounting top plate 312 is fixedly arranged at the upper end of the sliding side plate 311, and the mounting top plate 312 is provided with a threaded mounting hole 5 from top to bottom. The lower end of the stretching rod 32 is fixedly provided with a threaded connecting column 6, the diameter of the threaded connecting column 6 is smaller than the diameter of the stretching rod 32, a shoulder 7 is formed between the threaded connecting column 6 and the stretching rod 32, and the threaded connecting column 6 is threadedly connected in the threaded mounting hole 5. An anti-loosening spring 8 is sleeved outside the threaded connecting column 6, the upper end of the anti-loosening spring 8 abuts against the shoulder 7, and the lower end of the anti-loosening spring 8 abuts against the mounting top plate 312. The anti-loosening spring 8 applies an upward elastic force to the stretching rod 32 through the shoulder 7, so that the outer thread upper side of the threaded connecting column 6 abuts tightly against the inner thread lower side of the threaded mounting hole 5, thereby achieving the purpose of anti-loosening.

[0026] The side support plate 24 is provided with an avoiding through hole 15 in the horizontal direction. The driving mechanism 4 comprises a servo motor 41 arranged on the lower support plate 22, a transmission gear 42 arranged at the output end of the servo motor 41, and a transmission rack 43 arranged at the side wall of the sliding side plate 311, wherein the side part of the transmission gear 42 passes through the avoiding through hole 15 and is engaged with the transmission rack 43. Embodiment two

[0027] The difference between embodiment two and embodiment one is that Figures 3 to 5As shown, the stretching rod 32 comprises a stretching inner rod 321 and a stretching outer sleeve 322. The stretching inner rod 321 is coaxially fixed with the threaded connecting column 6, and the diameter of the stretching inner rod 321 is less than or equal to the diameter of the threaded connecting column 6. A limiting guide groove 9 is formed on the outer side of the stretching inner rod 321 and is arranged along the axial direction of the stretching inner rod 321. The stretching outer sleeve 322 is slidingly sleeved on the outer side of the stretching inner rod 321, and a limiting protrusion 10 is arranged on the inner side of the stretching outer sleeve 322 and is slidingly arranged in the limiting guide groove 9. The upper end of the anti-loosening spring 8 abuts against the stretching outer sleeve 322, and the anti-loosening spring 8 drives the limiting protrusion 10 to abut against the lower end inner groove wall of the limiting guide groove 9 through the elastic force.

[0028] A connecting hole 11 is formed on the side wall of the stretching outer sleeve 322 and is used to communicate with the limiting guide groove 9. The limiting protrusion 10 comprises a limiting sliding block 101 and a connecting screw 102. The limiting sliding block 101 is slidingly arranged in the limiting guide groove 9, and the threaded segment of the connecting screw 102 passes through the connecting hole 11 and is threadedly connected with the limiting sliding block 101. A buffer rubber ring 12 is sleeved on the outer side of the threaded segment of the connecting screw 102, and the head of the connecting screw 102 tightly fixes the buffer rubber ring 12 on the outer side wall of the stretching outer sleeve 322.

[0029] A positioning groove 13 is formed on the outer side of the stretching inner rod 321 and is arranged along the axial direction of the stretching inner rod 321. The positioning groove 13 is located on the side of the stretching inner rod 321 away from the limiting guide groove 9. A positioning protrusion 14 is arranged on the inner side of the stretching outer sleeve 322 and is slidingly arranged in the positioning groove 13.

[0030] The stretching outer sleeve 322 comprises a sliding pipe 3221 and a supporting top cover 3222. The supporting top cover 3222 is threadedly connected on the inner side of the upper end of the sliding pipe 3221.

[0031] Of course, the above is only a typical example of the present application, and in addition to this, the present application can have other various specific implementation manners. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of the present application.

Claims

1. A sealing and stretching device for a blow molding machine, comprising a stretching bracket (2), a stretching mechanism (3), and a driving mechanism (4), wherein the stretching mechanism (3) comprises a stretching seat (31) and a stretching rod (32), characterized in that: The tension seat (31) includes a sliding side plate (311) and a mounting top plate (312). The sliding side plate (311) is slidably connected to the tension bracket (2) via a slide rail (1). The mounting top plate (312) is fixedly installed at the upper end of the sliding side plate (311). The mounting top plate (312) is provided with a threaded mounting hole (5) running from top to bottom. The lower end of the tension rod (32) is fixedly provided with a threaded connecting post (6). The diameter of the threaded connecting post (6) is smaller than the diameter of the tension rod (32). A shoulder (7) is formed at the connection between the threaded connecting post (6) and the tension rod (32). The threaded connecting post (6) is threadedly connected in the threaded mounting hole (5). An anti-loosening spring (8) is sleeved on the outside of the threaded connecting post (6). The upper end of the anti-loosening spring (8) abuts against the shoulder (7), and the lower end of the anti-loosening spring (8) abuts against the mounting top plate (312).

2. The sealing and stretching device for a blow molding machine according to claim 1, characterized in that: The tension rod (32) includes an inner tension rod (321) and an outer tension rod (322). The inner tension rod (321) is coaxially fixed with the threaded connecting post (6), and the diameter of the inner tension rod (321) is less than or equal to the diameter of the threaded connecting post (6). A limiting guide groove (9) is provided on the outer side of the inner tension rod (321). The limiting guide groove (9) is arranged along the axial direction of the inner tension rod (321). The outer tension rod (322) is slidably sleeved on the outer side of the inner tension rod (321). A limiting protrusion (10) is provided on the inner side of the outer tension rod (322). The limiting protrusion (10) is slidably arranged in the limiting guide groove (9). The upper end of the anti-loosening spring (8) abuts against the outer tension rod (322), and the anti-loosening spring (8) drives the limiting protrusion (10) to abut against the lower end inner groove wall of the limiting guide groove (9) through elastic force.

3. The sealing and stretching device for a blow molding machine according to claim 2, characterized in that: The stretching jacket (322) has a connecting hole (11) on its side wall. The connecting hole (11) is used to communicate with the limiting guide groove (9). The limiting protrusion (10) includes a limiting slider (101) and a connecting screw (102). The limiting slider (101) is slidably disposed in the limiting guide groove (9). The threaded section of the connecting screw (102) passes through the connecting hole (11) and is threadedly connected to the limiting slider (101).

4. A sealing and stretching device for a blow molding machine according to claim 3, characterized in that: A buffer rubber ring (12) is fitted on the outer side of the threaded section of the connecting screw (102), and the head of the connecting screw (102) presses and fixes the buffer rubber ring (12) to the outer wall of the tension jacket (322).

5. A sealing and stretching device for a blow molding machine according to claim 4, characterized in that: The upper outer side of the inner tension rod (321) is provided with a positioning groove (13), the positioning groove (13) is arranged along the axial direction of the inner tension rod (321), and the positioning groove (13) is located on the side of the inner tension rod (321) away from the limiting guide groove (9). The upper inner side of the outer tension sleeve (322) is provided with a positioning protrusion (14), and the positioning protrusion (14) is slidably arranged in the positioning groove (13).

6. A sealing and stretching device for a blow molding machine according to claim 2, characterized in that: The stretching jacket (322) includes a sliding tube (3221) and a support top cover (3222), the support top cover (3222) being threadedly connected to the inner side of the upper end of the sliding tube (3221).

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