Single-cylinder bag clamp structure

Abstract

The utility model relates to a single-cylinder bag clamp structure which comprises a supporting frame body, a driving cylinder is arranged at one end of the supporting frame body, clamping jaws are hinged to the other end and the middle of the supporting frame body respectively, and the upper end of a linkage plate of one clamping jaw is connected with a piston rod of the driving cylinder. A transmission assembly is arranged between the linkage plates of the two clamping jaws and comprises a rotating shaft, connecting rods and a rotating arm, connecting plates are arranged on the supporting frame body, the rotating shaft is arranged between the connecting plates, the rotating arm is hinged to the rotating shaft, and the two ends of the rotating arm are connected with the linkage plates of the two clamping jaws through the connecting rods respectively. The two clamping jaws are connected through the transmission assembly, the two clamping jaws can be synchronously opened or closed through one air cylinder, and the two clamping jaws can better clamp the fixing columns on the supporting plates to be matched with the fixing columns according to the scissor fork principle, so that a packaging bag is clamped; the utility model has the advantages of simple structure, ingenious design, installation space saving and cost reduction.

Description

Technical Field

[0001] The utility model belongs to the technical field of packaging equipment and relates to a single-cylinder bag clamp structure. Background Art

[0002] Powder bagging machine is a common automatic packaging equipment and is widely used in the powder industry. Among them, the bag-holding and clamping mechanism of the powder bagging machine is one of the most important components. The bag is opened and clamped firmly through the bag-holding and clamping mechanism to facilitate the loading operation. The existing clamping mechanism is mostly driven by a cylinder. When the cylinder is small, the clamping force is also small, the clamping effect of the bag is not good, and the bag may become loose. Increasing the number of cylinders or increasing the specifications of the cylinders will also increase the cost. Summary of the invention

[0003] The utility model aims to overcome the deficiencies in the prior art, solve the problem that when the cylinder of the bag-supporting and clamping mechanism is small, the clamping effect of the packaging bag is poor, and provide a single-cylinder bag clamping structure.

[0004] In order to achieve the above purpose, the following technical solutions are adopted:

[0005] The single-cylinder bag clamp structure comprises a supporting frame, a driving cylinder, a clamping jaw and a transmission assembly, wherein a driving cylinder is arranged at one end of the supporting frame, and clamping jaws are respectively hinged at the other end and the middle of the supporting frame, and the upper end of a linkage plate of one clamping jaw is connected to the piston rod of the driving cylinder; a transmission assembly is arranged between the linkage plates of the two clamping jaws, and the transmission assembly comprises a rotating shaft, a connecting rod and a swing arm, connecting plates are respectively arranged in the middle of the upper part of the two side walls of the supporting frame, a rotating shaft is arranged between the connecting plates, a swing arm is hinged on the rotating shaft, and the two ends of the swing arm are respectively connected to the linkage plates of the two clamping jaws by means of a connecting rod; clamping support plates are symmetrically arranged at the bottom of the supporting frame, and fixing columns that can cooperate with the clamping plates of the clamping jaws are arranged on the clamping support plates.

[0006] Preferably, a connecting block is provided at one end of the support frame, a first slot is provided on the connecting block, and a second slot that can cooperate with the first slot is provided on the support frame.

[0007] Preferably, a mounting seat is provided on the support frame, a fixing sleeve is hinged on the mounting seat, and a cylinder body of the driving cylinder is installed in the fixing sleeve.

[0008] Preferably, hinge shafts are respectively provided at both ends of the swing arm, and clearance grooves are respectively opened on the two side walls of the support frame, and the hinge shaft at the lower end of the swing arm can cooperate with the clearance grooves.

[0009] Preferably, both ends of the connecting rod are respectively provided with joint bearings, and the linkage plates are respectively provided with connecting shafts capable of cooperating with the joint bearings.

[0010] Preferably, bag mouth support plates are respectively arranged on both sides of the clamping support plate.

[0011] Preferably, a plurality of grooves are formed in the clamping plate of the clamping jaw.

[0012] Preferably, the connecting rod is a connecting rod with adjustable length.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] In the utility model, two clamping jaws are connected through a transmission component, and one air cylinder can make the two clamping jaws open or close synchronously. By using the principle of scissor fork, the two clamping jaws can better cooperate with the fixed columns on the clamping support plate to realize the clamping of the packaging bag, ensuring that the maximum clamping force is achieved with a smaller air cylinder; the structure of the utility model is simple, ingeniously designed, saves installation space and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is a schematic diagram of the use state of the utility model.

[0017] Figure 3 It is a schematic diagram of the clamping jaw structure of the utility model.

[0018] In the figure: 1, support frame body; 2, driving air cylinder; 3, clamping jaw; 4, linkage plate; 5, rotating shaft; 6, connecting rod; 7, rotating arm; 8, connecting block; 9, first card slot; 10, second card slot; 11, mounting seat; 12, fixed sleeve; 13, hinge shaft; 14, relief groove; 15, spherical plain bearing; 16, connecting shaft; 17, bag mouth support plate; 18, clamping plate; 19, groove; 20, clamping support plate; 21, fixed column; 22, connecting plate; 23, packaging bag. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.

[0020] As Figures 1 - 3As shown in the figure, a single-cylinder bag clamping structure includes a support frame body 1, a driving cylinder 2, clamping jaws 3 and a transmission component. The support frame body 1 can be connected to an external device and provide installation support for the components of this device;

[0021] One end of the support frame body 1 is provided with a driving cylinder 2. The other end and the middle part of the support frame body 1 are respectively hinged with clamping jaws 3. The upper end of the linkage plate 4 of one of the clamping jaws 3 is connected to the piston rod of the driving cylinder 2. When the piston rod of the driving cylinder 2 expands and contracts, it can drive one of the clamping jaws 3 to move;

[0022] A transmission component is arranged between the linkage plates 4 of the two clamping jaws 3. When one of the clamping jaws 3 moves, it can drive the other clamping jaw 3 to move by using the transmission component;

[0023] The transmission component includes a rotating shaft 5, a connecting rod 6 and a rotating arm 7. The middle parts of the upper surfaces of the two side walls of the support frame body 1 are respectively provided with connecting plates 22. A rotating shaft 5 is arranged between the connecting plates 22. The rotating arm 7 is hinged on the rotating shaft 5, and the rotating arm 7 can rotate on the rotating shaft 5;

[0024] Both ends of the rotating arm 7 are respectively connected to the linkage plates 4 of the two clamping jaws 3 by using the connecting rod 6. When the linkage plate 4 of one of the clamping jaws 3 moves, it drives the rotating arm 7 through the connecting rod 6, and the rotating arm 7 drives the other clamping jaw 3 to move through another connecting rod 6; that is, when the piston rod of the driving cylinder 2 extends forward, one of the clamping jaws 3 opens. This clamping jaw 3 drives a connecting rod 6 to move. This connecting rod 6 pushes the rotating arm 7 to rotate. The rotating arm 7 drives the other clamping jaw 3 to open by using another connecting rod 6, realizing the synchronous opening action of the two clamping jaws 3; conversely, the two clamping jaws 3 close;

[0025] Clamping support plates 20 are symmetrically arranged on the lower surface of the support frame body 1. Fixed columns 21 that can cooperate with the clamping plates 18 of the clamping jaws 3 are arranged on the clamping support plates 20. The bag mouth of the packaging bag 23 realizes the work of supporting the bag to open through the cooperation of the fixed columns 21 and the clamping plates 18.

[0026] Furthermore, a connecting block 8 is arranged at one end of the support frame body 1. A first clamping groove 9 is opened on the connecting block 8. A second clamping groove 10 that can cooperate with the first clamping groove 9 is opened on the support frame body 1. The first clamping groove 9 and the second clamping groove 10 form an assembly hole, so that the support frame body 1 can be firmly installed on the square tube of the external device.

[0027] Furthermore, a mounting seat 11 is arranged on the support frame body 1. A fixed sleeve 12 is hinged on the mounting seat 11. The cylinder body of the driving cylinder 2 is installed in the fixed sleeve 12. The cylinder body of the driving cylinder 2 can rotate at a certain angle on the mounting seat 11 by using the fixed sleeve 12, avoiding movement interference.

[0028] Further, hinge shafts 13 are respectively arranged at both ends of the swing arm 7, and relief grooves 14 are respectively formed on both side walls of the support frame body 1. The hinge shaft 13 at the lower end of the swing arm 7 can cooperate with the relief groove 14, and the hinge shaft 13 can swing within the relief groove 14 to avoid movement interference.

[0029] Further, spherical plain bearings 15 are respectively arranged at both ends of the connecting rod 6, and the spherical plain bearings 15 enable the transmission assembly to move smoothly; connecting shafts 16 that can cooperate with the spherical plain bearings 15 are respectively arranged on the linkage plate 4.

[0030] Further, mouth support plates 17 are respectively arranged on both sides of the clamping support plate 20. The clamping support plate 20 and the mouth support plates 17 fully open the mouth of the packaging bag 23, facilitating material loading.

[0031] Further, a plurality of grooves 19 are formed on the clamping plate 18, and the grooves 19 increase the friction of the clamping plate 18, making the bag clamping more stable.

[0032] Further, the connecting rod 6 is a length-adjustable connecting rod, and the length-adjustable connecting rod facilitates adjusting the opening and closing movement angle of the clamping jaw 3.

[0033] Working principle: When the present utility model is in use, first, the support frame body 1 is installed on the packaging equipment through the connecting block 8. Then, the driving cylinder 2 acts, and the piston rod of the driving cylinder 2 extends forward. One clamping jaw 3 opens, and the connecting rod 6 and the swing arm 7 are used to drive the other clamping jaw 3 to open, realizing the synchronous opening action of the two clamping jaws 3. The packaging bag 23 is sleeved outside the mouth support plate 17 and the clamping support plate 20. The piston rod of the driving cylinder 2 retracts, driving the two clamping jaws 3 to close and cooperate with the fixed columns on the clamping support plate 20, so that the packaging bag 23 is firmly clamped, and the next bagging operation can be carried out;

[0034] The present utility model connects the two clamping jaws 3 through the transmission assembly, enabling better synchronization performance between the two clamping jaws 3. Using the principle of scissor fork, the two clamping jaws 3 can better cooperate with the fixed columns 21 on the clamping support plate 20, thereby realizing the clamping of the packaging bag 23. Due to space limitations, using plane geometry, the theoretical lengths of each connecting rod can be calculated to facilitate maximizing the clamping force with a smaller cylinder.

[0035] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present utility model. However, the present utility model is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present utility model, and these modifications and improvements are also regarded as the protection scope of the present utility model.

Claims

1. A single-cylinder bag clamp structure, comprising a support frame (1), a driving cylinder (2), a clamping claw (3) and a transmission assembly, wherein: A driving cylinder (2) is arranged at one end of the support frame (1), and clamping jaws (3) are hingedly connected at the other end and the middle of the support frame (1), wherein the upper end of the linkage plate (4) of one of the clamping jaws (3) is connected to the piston rod of the driving cylinder (2); a transmission assembly is arranged between the linkage plates (4) of the two clamping jaws (3), and the transmission assembly comprises a rotating shaft (5), a connecting rod (6) and a swing arm (7); connecting plates (22) are arranged at the middle of the upper side walls of the support frame (1), a rotating shaft (5) is arranged between the connecting plates (22), a swing arm (7) is hingedly connected to the rotating shaft (5), and the two ends of the swing arm (7) are respectively connected to the linkage plates (4) of the two clamping jaws (3) by means of the connecting rod (6); clamping support plates (20) are symmetrically arranged at the bottom of the support frame (1), and the clamping support plates (20) are provided with fixing columns (21) that can cooperate with the clamping plates (18) of the clamping jaws (3).

2. The single-cylinder bag clamp structure according to claim 1 is characterized in that: A connecting block (8) is provided at one end of the support frame (1), a first card slot (9) is provided on the connecting block (8), and a second card slot (10) capable of matching with the first card slot (9) is provided on the support frame (1).

3. The single-cylinder bag clamp structure according to claim 1 is characterized in that: The support frame (1) is provided with a mounting seat (11), a fixing sleeve (12) is hingedly connected to the mounting seat (11), and a cylinder body of the driving cylinder (2) is installed in the fixing sleeve (12).

4. The single-cylinder bag clamp structure according to claim 1 is characterized in that: Hinge shafts (13) are respectively arranged at both ends of the swing arm (7), and clearance grooves (14) are respectively opened on the two side walls of the support frame (1), and the hinge shaft (13) at the lower end of the swing arm (7) can cooperate with the clearance groove (14).

5. The single-cylinder bag clamp structure according to claim 1 is characterized in that: Both ends of the connecting rod (6) are respectively provided with joint bearings (15), and the linkage plate (4) is respectively provided with connecting shafts (16) capable of matching with the joint bearings (15).

6. The single-cylinder bag clamp structure according to claim 1 is characterized in that: Bag opening support plates (17) are respectively arranged on both sides of the clamping support plate (20).

7. The single-cylinder bag clamp structure according to claim 1 is characterized in that: The clamping plate (18) is provided with a plurality of grooves (19).

8. The single-cylinder bag clamp structure according to claim 1 is characterized in that: The connecting rod (6) is a length-adjustable connecting rod.

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