Bag pulling mechanism of packaging machine

Abstract

The utility model discloses a packing machine bag pulling mechanism which comprises a bag pulling shaft sleeve, a fixing shaft, a pressing sleeve, a nut, a spring and an anti-rotation mechanism, one end of the fixing shaft is in threaded connection with the nut, the other end of the fixing shaft is rotatably connected with the bag pulling shaft sleeve, the pressing sleeve is movably sleeved on the fixing shaft and located between the nut and the bag pulling shaft sleeve, and the spring is sleeved on the fixing shaft and located between the nut and the bag pulling shaft sleeve. One end of the spring abuts against the nut, the other end of the spring abuts against the pressing sleeve, the pressing sleeve is pressed on the bag pulling shaft sleeve through elastic force of the spring, and the anti-rotation mechanism acts on the pressing sleeve to enable the pressing sleeve not to rotate around the fixing shaft. The pressing sleeve is pressed on the bag pulling shaft sleeve through the spring, friction force is generated between the pressing sleeve and the bag pulling shaft sleeve, the rotating speed of the bag pulling shaft sleeve is controlled through the friction force, and therefore the rotating speed of a packaging bag is controlled, and stable feeding of the packaging bag is guaranteed; synchronous rotation of the packaging bag and the bag pulling shaft sleeve is guaranteed, and idle running of the packaging bag is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging machines, and more specifically, to a bag pulling mechanism of a packaging machine. Background Art

[0002] The packaging machine feeds the packaging bags through the bag pulling mechanism, squeezes and bonds the edges of the packaging bags at the same time, then puts a certain amount of product into the packaging bags, seals the packaging bags, and continues to feed the bags through the bag pulling mechanism for repeated packaging.

[0003] In the process of feeding packaging bags, the existing bag pulling mechanism is prone to unstable feeding of packaging bags due to unstable supply tension of packaging bags, resulting in bag dropping, rebound, deviation and jamming, causing abnormal bag pulling, thus affecting subsequent product loading, sealing and other processes.

[0004] Therefore, it is necessary to propose a new solution to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and to provide a bag pulling mechanism for a packaging machine, in which a pressing sleeve is pressed against a bag pulling sleeve by a spring, so that friction is generated between the pressing sleeve and the bag pulling sleeve, and the friction is used to control the rotation speed of the bag pulling sleeve, thereby controlling the rotation speed of the packaging bag to ensure stable feeding of the packaging bag, and the packaging bag and the bag pulling sleeve are tightly fitted by convex ribs to ensure that the packaging bag and the bag pulling sleeve rotate synchronously, and the packaging bag will not idle.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A bag pulling mechanism for a packaging machine includes a bag pulling shaft sleeve, a fixed shaft, a pressing sleeve, a nut, a spring, and an anti-rotation mechanism. One end of the fixed shaft is threadedly connected to the nut, and the other end of the fixed shaft is rotatably connected to the bag pulling shaft sleeve. The pressing sleeve is movably sleeved on the fixed shaft and is located between the nut and the bag pulling shaft sleeve. The spring is sleeved on the fixed shaft, and one end of the spring abuts the nut, and the other end of the spring abuts the pressing sleeve, and the pressing sleeve is pressed against the bag pulling shaft sleeve by the elastic force of the spring. The anti-rotation mechanism acts on the pressing sleeve to prevent the pressing sleeve from rotating around the fixed shaft.

[0008] Furthermore, a plurality of convex ribs are circumferentially mounted on the outer side wall of the bag pulling sleeve.

[0009] Furthermore, the convex rib includes a mounting portion and a raised portion, and a plurality of mounting grooves are circumferentially opened on the outer side wall of the bag pulling sleeve, the mounting portion is embedded in the mounting groove, one end of the raised portion is connected to the mounting portion, and the other end of the raised portion extends to the outside of the bag pulling sleeve, and a fixing plate is installed on the side of the bag pulling sleeve facing the pressing sleeve, and the mounting portion is limited in the mounting groove by the fixing plate.

[0010] Furthermore, the side of the convex rib facing the pressing sleeve is an outwardly inclined slope.

[0011] Furthermore, the anti-rotation mechanism includes a limiting rod radially mounted on the pressing sleeve, a limiting hole located between the nut and the bag pulling sleeve is opened on the fixed shaft, and the limiting rod penetrates and is slidably connected to the limiting hole.

[0012] Furthermore, a support plate is installed on the side of the bag pulling sleeve away from the pressing sleeve.

[0013] Furthermore, a baffle is provided on the outer side of the support plate, and the baffle is circumferentially arranged around the support plate.

[0014] Furthermore, a bearing groove is provided on the side of the bag pulling sleeve away from the pressing sleeve, a plane bearing is installed in the bearing groove, one end of the plane bearing is fixedly connected to the bottom of the bearing groove, and the other end of the fixed shaft passes through the bag pulling sleeve and the plane bearing and is fixedly connected to the other end of the plane bearing.

[0015] The beneficial effects of the utility model are:

[0016] 1. In the utility model, the spring presses the pressing sleeve onto the bag pulling sleeve through its elastic force, so that friction is generated between the pressing sleeve and the bag pulling sleeve, and the friction is used to control the rotation speed of the bag pulling sleeve, thereby controlling the rotation speed of the packaging bag to ensure stable feeding of the packaging bag.

[0017] 2. In the utility model, the elastic force of the spring is adjusted by adjusting the installation position of the nut on the fixed shaft, thereby adjusting the friction between the pressing sleeve and the bag pulling sleeve.

[0018] 3. In the utility model, an anti-rotation mechanism is provided to prevent the pressing sleeve from rotating with the bag pulling sleeve, so as to ensure the friction effect between the pressing sleeve and the bag pulling sleeve, thereby ensuring stable feeding of the packaging bag.

[0019] 4. In the utility model, by providing convex ribs, the packaging bag and the bag pulling sleeve are tightly fitted and matched, ensuring that the packaging bag and the bag pulling sleeve rotate synchronously, and the packaging bag will not rotate idly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of the bag pulling mechanism of the packaging machine in this embodiment;

[0021] Figure 2 A schematic cross-sectional view of the bag pulling mechanism of the packaging machine in this embodiment;

[0022] Figure 3 This is a schematic diagram of a use state of the bag pulling mechanism of the packaging machine in this embodiment;

[0023] Figure 4 A schematic diagram of the structure of the bag pulling sleeve in this embodiment;

[0024] Figure 5 A schematic diagram of the structure of the convex rib in this embodiment;

[0025] Figure 6 Schematic diagram of a connection structure between the bag pulling sleeve and the convex rib in this embodiment.

[0026] Figure numerals: bag pulling sleeve 1, mounting groove 101, fixed shaft 2, pressing sleeve 3, nut 4, spring 5, anti-rotation mechanism 6, limiting rod 601, limiting hole 602, rib 7, mounting portion 701, raised portion 702, inclined surface 703, fixing plate 8, support plate 9, baffle 10, bearing groove 11, plane bearing 12, packaging bag 13. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Embodiment: A bag pulling mechanism for a packaging machine, such as Figure 1-Figure 6 As shown, it includes a bag pulling sleeve 1, a fixed shaft 2, a pressing sleeve 3, a nut 4, a spring 5, and an anti-rotation mechanism 6. One end of the fixed shaft 2 is threadedly connected to the nut 4, and the other end of the fixed shaft 2 is rotatably connected to the bag pulling sleeve 1. The pressing sleeve 3 is movably sleeved on the fixed shaft 2 and is located between the nut 4 and the bag pulling sleeve 1, that is, the pressing sleeve 3 is slidably connected to the fixed shaft 2, and slides between the nut 4 and the bag pulling sleeve 1 along the length direction of the fixed shaft 2. The spring 5 is sleeved on the fixed shaft 2, one end of the spring 5 abuts against the nut 4, and the other end of the spring 5 abuts against the pressing sleeve 3, and the pressing sleeve 3 is pressed against the bag pulling sleeve 1 by the elastic force of the spring 5, and the anti-rotation mechanism 6 acts on the pressing sleeve 3 to prevent the pressing sleeve 3 from rotating around the fixed shaft 2.

[0029] When in use, the packaging bag 13 is sleeved on the bag pulling sleeve 1. When the packaging bag provides a pulling force to pull the packaging bag 13 to rotate, the packaging bag 13 is sleeved on the bag pulling sleeve 1, which will drive the bag pulling sleeve 1 to rotate together. Since the spring 5 presses the pressing sleeve 3 on the bag pulling sleeve 1 through its elastic force, friction is generated between the pressing sleeve 3 and the bag pulling sleeve 1, and the friction is used to control the rotation speed of the bag pulling sleeve 1, thereby controlling the rotation speed of the packaging bag 13 to ensure stable feeding of the packaging bag 13. At the same time, the elastic force of the spring 5 can be adjusted by adjusting the installation position of the nut 4 on the fixed shaft 2, thereby adjusting the pressure of the pressing sleeve 3 on the bag pulling sleeve 1, that is, adjusting the friction between the pressing sleeve 3 and the bag pulling sleeve 1.

[0030] Further, such as Figure 2As shown, the anti-rotation mechanism 6 includes a limiting rod 601 radially mounted on the pressing sleeve 3, and a limiting hole 602 is provided on the fixed shaft 2. The limiting hole 602 is located between the nut 4 and the bag pulling sleeve 1, and the limiting hole 602 is a long waist hole extending along the length direction of the fixed shaft 2. By setting the anti-rotation mechanism 6, the pressing sleeve 3 can be prevented from rotating around the fixed shaft 2, that is, the pressing sleeve 3 is not driven to rotate when the bag pulling sleeve 1 rotates, so as to ensure the friction effect between the pressing sleeve 3 and the bag pulling sleeve 1, thereby ensuring the stable feeding of the packaging bag 13.

[0031] Furthermore, a plurality of convex ribs 7 are circumferentially installed on the outer side wall of the bag pulling sleeve 1; by providing the convex ribs 7, the packaging bag 13 and the bag pulling sleeve 1 are tightly matched to ensure that the packaging bag 13 and the bag pulling sleeve 1 rotate synchronously, and the packaging bag 13 will not rotate idly.

[0032] Specifically, Figure 4-Figure 6 As shown, the convex rib 7 includes a mounting portion 701 and a raised portion 702, and a plurality of mounting grooves 101 are circumferentially provided on the outer wall of the bag pulling sleeve 1, the mounting portion 701 is embedded in the mounting groove 101, one end of the raised portion 702 is connected to the mounting portion 701, and the other end of the raised portion 702 extends to the outside of the bag pulling sleeve 1, and a fixing plate 8 is installed on the side of the bag pulling sleeve 1 facing the pressing sleeve 3, and the mounting portion 701 is limited in the mounting groove 101 by the fixing plate 8; by adopting the above design, the convex rib 7 can be detachably installed on the bag pulling sleeve 1, and convex ribs 7 of different specifications (i.e., different heights of the raised portions 702) can be selected to adapt to the installation of the packaging bag 13, so as to achieve a tight installation fit between the packaging bag 13 and the bag pulling sleeve 1.

[0033] Preferably, the side of the rib 7 facing the pressing sleeve 3 is an outwardly inclined slope 703 ; with the above design, the guiding effect of the slope 703 is utilized to facilitate the sleeve of the packaging bag 13 on the bag pulling sleeve 1 .

[0034] Furthermore, a support plate 9 is installed on the side of the bag pulling sleeve 1 away from the pressing sleeve 3 , and the support plate 9 is fixedly installed on the bag pulling sleeve 1 ; the support plate 9 plays a supporting role and is used to support the packaging bag 13 .

[0035] A baffle 10 is provided on the outer side of the support plate 9 , and the baffle 10 is circumferentially arranged around the support plate 9 ; the baffle 10 serves to protect the packaging bag 13 .

[0036] like Figure 2 As shown, a bearing groove 11 is provided on the side of the bag pulling sleeve 1 away from the pressing sleeve 3, a plane bearing 12 is installed in the bearing groove 11, one end of the plane bearing 12 is fixedly connected to the bottom of the bearing groove 11, and the other end of the fixed shaft 2 passes through the bag pulling sleeve 1 and the plane bearing 12 and is fixed to the other end of the plane bearing 12. The plane bearing 12 is provided to realize the rotation connection between the fixed shaft 2 and the bag pulling sleeve 1.

[0037] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A bag pulling mechanism for a packaging machine, comprising a bag pulling shaft sleeve (1), a fixed shaft (2), a pressing sleeve (3), a nut (4), a spring (5), and an anti-rotation mechanism (6), characterized in that: One end of the fixed shaft (2) is threadedly connected to the nut (4), and the other end of the fixed shaft (2) is rotatably connected to the bag pulling sleeve (1). The pressing sleeve (3) is movably sleeved on the fixed shaft (2) and is located between the nut (4) and the bag pulling sleeve (1). The spring (5) is sleeved on the fixed shaft (2), and one end of the spring (5) abuts against the nut (4), and the other end of the spring (5) abuts against the pressing sleeve (3). The pressing sleeve (3) is pressed against the bag pulling sleeve (1) by the elastic force of the spring (5). The anti-rotation mechanism (6) acts on the pressing sleeve (3) to prevent the pressing sleeve (3) from rotating around the fixed shaft (2).

2. A bag pulling mechanism for a packaging machine according to claim 1, characterized in that: A plurality of convex ribs (7) are circumferentially mounted on the outer side wall of the bag pulling sleeve (1).

3. A bag pulling mechanism for a packaging machine according to claim 2, characterized in that: The convex rib (7) comprises a mounting portion (701) and a raised portion (702); a plurality of mounting grooves (101) are circumferentially formed on the outer wall of the bag pulling sleeve (1); the mounting portion (701) is embedded in the mounting groove (101); one end of the raised portion (702) is connected to the mounting portion (701); the other end of the raised portion (702) extends to the outside of the bag pulling sleeve (1); a fixing plate (8) is installed on the side of the bag pulling sleeve (1) facing the pressing sleeve (3); and the mounting portion (701) is limited in the mounting groove (101) by the fixing plate (8).

4. A bag pulling mechanism for a packaging machine according to claim 2, characterized in that: The side of the convex rib (7) facing the pressing sleeve (3) is an outwardly inclined inclined surface (703).

5. The bag pulling mechanism of a packaging machine according to claim 1, characterized in that: The anti-rotation mechanism (6) comprises a limiting rod (601) radially mounted on the pressing sleeve (3); a limiting hole (602) located between the nut (4) and the bag pulling sleeve (1) is provided on the fixed shaft (2); and the limiting rod (601) penetrates and is slidably connected to the limiting hole (602).

6. The bag pulling mechanism of a packaging machine according to claim 1, characterized in that: A support plate (9) is installed on the side of the bag pulling sleeve (1) away from the pressing sleeve (3).

7. A bag pulling mechanism for a packaging machine according to claim 6, characterized in that: A baffle (10) is provided on the outer side of the support plate (9), and the baffle (10) is circumferentially arranged around the support plate (9).

8. The bag pulling mechanism of a packaging machine according to claim 1, characterized in that: A bearing groove (11) is provided on the side of the bag pulling sleeve (1) away from the pressing sleeve (3), a plane bearing (12) is installed in the bearing groove (11), one end of the plane bearing (12) is fixedly connected to the bottom of the bearing groove (11), and the other end of the fixed shaft (2) passes through the bag pulling sleeve (1) and the plane bearing (12) and is fixedly connected to the other end of the plane bearing (12).

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