Stretching sealing linkage device

Abstract

The utility model relates to the technical field of bottle blowing equipment, in particular to a stretching and sealing linkage device which comprises a stretching support, and a linear driving mechanism, a stretching mechanism and a sealing mechanism are arranged on the stretching support. The linkage mechanism is used for linking the stretching mechanism and the sealing mechanism. The linkage mechanism mainly comprises the two connecting rods and the two cams with the limiting grooves, is used for linkage of the stretching mechanism and the sealing mechanism and is small in pressure angle, continuous in action, high in movement precision and good in stability in the action process, the noise condition caused by high-speed operation and collision of components is avoided, and the service life of the stretching mechanism and the sealing mechanism is prolonged. The problem that an existing stretching sealing linkage device is prone to untight sealing is solved. And the device is simple in structure and low in machining cost, and existing equipment is easy to transform.

Description

Technical Field

[0001] The utility model relates to the technical field of bottle blowing equipment, in particular to a stretching and sealing linkage device. Background Art

[0002] As the bottle blowing machine develops towards high speed and low noise, the requirements for the motion accuracy of each mechanism of the bottle blowing machine are getting higher and higher. During the execution of a bottle blowing action, the lifting and lowering of the sealing cylinder and the stretching rod need to be completed continuously. The lifting and lowering of the sealing cylinder of the existing equipment is usually completed by the combined action of the cylinder and the cam to complete the expected motion trajectory, and the lifting and lowering of the stretching rod is powered by the cylinder or servo motor. The two groups of mechanisms have different powers to complete the lifting and lowering actions. Although the two need to work together, they are independent of each other and have no actual linkage, resulting in high complexity of the equipment mechanism, which has a certain impact on the high-speed and stable operation of the equipment; at the same time, the noise of the roller of the sealing mechanism is usually large when sliding on the cam assembly, which seriously affects the working environment.

[0003] In response to the above problems, Chinese invention patent application with publication number CN116373265A and Chinese utility model patent with publication number CN214239492U disclose a technical solution of realizing sealing and stretching linkage by driving a connecting rod mechanism with a cam. However, this solution, like the non-linkage solution, has the phenomenon of the roller contacting the cam at high speed, which, on the one hand, causes greater noise, and on the other hand, is more difficult to process and more expensive.

[0004] In addition, the Chinese invention patent application with publication number CN116533499A discloses a stretching and sealing linkage device, including a frame, a stretching slider, a sealing slider, a stretching rod, a crank connected to the frame at the lower end to be rotatable around a first axis, and a connecting rod rotatably connected to the stretching slider and the upper end of the crank at the upper and lower ends. In this scheme, the sealing cam is driven up and down to achieve linkage through the swing of the connecting rod, but the pressure angle of this scheme is difficult to control, and it is easy to loosen due to poor force, which may cause a loose seal. Utility Model Content

[0005] The technical problem solved by the utility model is that the existing stretching and sealing linkage device is prone to the problem of loose sealing.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A stretching and sealing linkage device comprises a stretching bracket, on which a linear driving mechanism, a stretching mechanism and a sealing mechanism are arranged; a linkage mechanism is used to link the stretching mechanism and the sealing mechanism, and the linkage mechanism comprises:

[0008] A mounting block, the mounting block is connected to the stretching mechanism and moves synchronously;

[0009] A first cam, wherein the first cam is fixedly disposed on the stretching bracket and a limiting groove is provided on the first cam;

[0010] a second cam, the second cam is connected to the sealing mechanism and moves synchronously, and a limiting groove is provided on the second cam;

[0011] a first connecting rod, one end of which is rotatably connected to the mounting block;

[0012] a second connecting rod, one end of which is hinged to the first connecting rod;

[0013] A rotating shaft is fixedly connected to an end of the second connecting rod away from the first connecting rod, and two ends of the rotating shaft are respectively matched with the limiting grooves on the first cam and the second cam.

[0014] In one solution of the utility model: rollers cooperating with the limiting grooves are respectively sleeved on both ends of the rotating shaft.

[0015] In one scheme of the utility model: the linear drive mechanism includes a power source, a screw rod and a linear guide rail, the power source is fixedly arranged on the stretching bracket and drives the screw rod, the screw rod is threaded with a ball nut, the linear guide rail is fixedly arranged on the stretching bracket, and a slider 1 and a slider 2 are slidably fitted thereon, and the ball nut is fixedly connected to the slider 1.

[0016] In one scheme of the utility model: the stretching mechanism includes a first mounting seat and a stretching rod, the mounting block is fixedly connected to the side of the first mounting seat, the first mounting seat is fixedly connected to a slider, and the stretching rod is fixedly connected to the first mounting seat and moves up and down to penetrate the valve group.

[0017] In one scheme of the utility model: the sealing mechanism includes a second mounting seat, a lifting cylinder and a sealing sleeve, the second cam is fixedly connected to the second mounting seat, the second mounting seat is fixedly connected to the second slider, the upper end of the lifting cylinder is fixedly connected to the second mounting seat, and the lower end is fixedly connected to the sealing sleeve, the lifting cylinder is sleeved on the outside of the stretching rod, and moves up and down to pass through the valve group.

[0018] In one solution of the utility model: an elastic member is sleeved on the lifting cylinder, and the lower end of the elastic member abuts against the sealing sleeve.

[0019] In one embodiment of the present invention, the elastic member is a compression spring or a gas spring.

[0020] Beneficial effects of the utility model:

[0021] The linkage mechanism of the present application mainly includes two connecting rods and two cams with limited slots, which are used to link the stretching mechanism and the sealing mechanism. The linkage mechanism has a small pressure angle, and the linkage mechanism has continuous movement, high movement accuracy, and good stability during operation. No noise caused by high-speed operation and collision of components will not occur, which solves the problem that the existing stretching and sealing linkage device is prone to loose sealing. In addition, the device has a simple structure, low processing cost, and is easy to modify existing equipment.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the utility model in the initial state;

[0025] Figure 2 It is a three-dimensional structural schematic diagram of the utility model in a state where the stretching and sealing action is completed;

[0026] Figure 3 This utility model Figure 2 Schematic diagram of the structure with a partial enlargement of the central rotation axis.

[0027] The accompanying drawings are marked as follows: 1. stretching bracket; 2. linear guide rail; 3. slider one; 4. power source; 5. slider two; 6. screw rod; 7. ball nut; 8. first mounting seat; 9. stretching rod; 10. lifting cylinder; 11. second mounting seat; 12. valve group; 13. elastic member; 14. sealing sleeve; 15. mounting block; 16. first connecting rod; 17. second connecting rod; 18. first cam; 19. roller one; 20. rotating shaft; 21. roller two; 22. second cam. DETAILED DESCRIPTION

[0028] 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 of 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.

[0029] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] See also Figure 1-3 The utility model is a stretching and sealing linkage device, which mainly comprises a stretching bracket 1, a power source 4 arranged on the stretching bracket 1, a linear motion mechanism, a stretching mechanism, a sealing mechanism and a linkage mechanism. The power source 4 is fixedly arranged on the stretching bracket 1.

[0032] See also Figure 1-3 In one embodiment of the utility model, the linear motion mechanism includes a linear guide rail 2 fixedly mounted on a stretching bracket 1, a slider 1 3 and a slider 2 5 cooperating with the linear motion on the linear guide rail 2, a screw rod 6 driven by a power source 4, and a ball nut 7; that is, the linear guide rail 2 is fixedly arranged on the stretching bracket 1, the slider 1 3 and the slider 2 5 are respectively slidably arranged on the linear guide rail 2, the power source 4 drives the connecting screw rod 6, and the ball nut 7 is fixedly connected to the slider 1 3 and sleeved on the screw rod 6 so as to be used to realize linear motion.

[0033] See also Figure 1-3 In one embodiment of the utility model, the stretching mechanism includes a first mounting seat 8 mounted on a slider 3, a stretching rod 9 and a valve group 12 clamped by the first mounting seat 8, and an elastic member 13 is sleeved on the lifting cylinder 10 to provide a force for the sealing sleeve 14 to move downward; that is, the first mounting seat 8 is fixedly connected to the slider 3, the stretching rod 9 is fixedly connected to the first mounting seat 8, and the lower end of the elastic member 13 abuts against the sealing sleeve 14 to provide a downward elastic force. The elastic member 13 is usually provided by a conventional sealing mechanism. The elastic member 13 in this embodiment is a spring, but it can also be in the form of a gas spring included in the valve group 12. The elastic member 13 in this embodiment is located on the upper side of the sealing sleeve 14, but it can also be arranged on the connecting rod and the roller. As long as the elastic member 13 can provide a force for the components in the mechanism to return to the initial state.

[0034] See also Figure 1-3 In one embodiment of the utility model, the sealing mechanism includes a second mounting seat 11 fixedly mounted on the slider 2 5, a lifting cylinder 10 clamped by the second mounting seat 11, and a sealing sleeve 14 rigidly connected to the lifting cylinder 10, wherein the lifting cylinder 10 passes through the valve group 12 and can move freely in a straight line, and the stretching rod 9 passes through the lifting cylinder 10 and can move freely in a straight line; that is, the upper end of the lifting cylinder 10 is fixedly connected to the second mounting seat 11, and the lower end is fixedly connected to the sealing sleeve 14. The lifting cylinder 10 and the valve group 12 slide linearly up and down, and the stretching rod 9 is located in the lifting cylinder 10 and interacts with the lifting cylinder 10 up and down.

[0035] See also Figure 1-3 In one embodiment of the utility model, in the linkage mechanism, the mounting block 15 is rigidly connected to the first mounting seat 8, and the first connecting rod 16 and the second connecting rod 17 that can only rotate freely are sequentially installed on the outer side of the mounting block 15. The other end of the second connecting rod 17 is connected to the rotating shaft 20, and the two ends of the rotating shaft 20 are respectively connected to the rotatable roller 19 and the roller 21, the roller 19 is limited to the first cam 18 rigidly connected to the stretching bracket 1, and the roller 21 is limited to the second cam 22 rigidly connected to the second mounting seat 11. That is, the mounting block 15 is fixedly connected to the side position of the first mounting seat 8, the upper end of the first connecting rod 16 is rotatably connected to the mounting block 15, and the other end is hinged to the second connecting rod 17, and the end of the second connecting rod 17 away from the first connecting rod 16 is fixedly provided with the rotating shaft 20, and the two ends of the rotating shaft 20 are respectively located in the limiting grooves opened on the first cam 18 and the second cam 22. Among them, the first cam 18 is fixedly connected to the stretching bracket 1, and the second cam 22 is fixedly connected to the second mounting seat 11. Furthermore, in order to reduce the resistance of the rotating shaft 20 moving in the limiting groove, a roller (ie, roller 1 19 and roller 2 21 ) is respectively sleeved on both ends of the rotating shaft 20 .

[0036] The working principle of this utility model:

[0037] The initial state is Figure 1As shown, the slider 1 3 and the slider 2 5 are both located at a high position on the linear guide rail 2, the hinges of the first connecting rod 16 and the second connecting rod 17 (the two connecting rods are of equal length) are kept in the same straight line, the elastic member 13 is in a compressed state, and the sealing sleeve 14 and the stretching rod 9 are both in a lifted state. After starting work, the first mounting seat 8 moves linearly downward under the coordinated action of the power source 4 and the linear motion mechanism; since the mounting block 15 is rigidly connected to the first mounting seat 8, the first connecting rod 16 and the second connecting rod 17 move downward synchronously, and the roller 1 19 and the roller 2 21 move outward (the stretching bracket 1 points to the direction of the valve group 12), thereby driving the second cam 22 (the second mounting seat 11) to move downward, and at the same time, the elastic member 13 releases potential energy, pushing the sealing sleeve 14 to move downward to seal the preform, until the roller 19 reaches the outermost side of the limit groove on the first cam 18, at which time the sealing is completed (the slider 2 5 reaches the bottom). Then, the slider 3 continues to descend. At this time, the force direction of the upper end of the first connecting rod 16 is vertically downward, which is not in the same direction as the positions of the two connecting rods, and the freedom of the lower end of the second connecting rod 17 is limited, so that the middle hinge of the two connecting rods rotates, and at the same time, the stretching rod 9 moves downward to pass through the sealing sleeve 14 until the stretching action is completed (the slider 3 reaches the bottom). The state at this time is as follows Figure 2 At this time, the stretching and sealing action is completed, and then the device needs to return to the initial state and wait for the next work. At this time, the slider 13 is subjected to an upward force. At this time, the force direction of the upper end of the first connecting rod 16 is vertically upward, and the middle hinge of the two connecting rods rotates until the two connecting rods are straightened (all the hinges of the two connecting rods are on the same straight line). Then, the slider 13 continues to rise, and the straightened two connecting rods drive the roller 19 and the roller 21 to move toward the inside of the cam, and drive the second cam 22 (slider 2 5) to move upward, so that the sealing sleeve 14 is gradually lifted, and the elastic member 13 is compressed; at the same time, the stretching rod 9 moves upward and returns to the initial state as shown. Figure 1 .

[0038] The linkage mechanism of the present application mainly includes two connecting rods and two cams with limiting grooves, which are used to link the stretching mechanism and the sealing mechanism. The linkage mechanism has a small pressure angle, and the linkage mechanism has continuous movement, high movement accuracy, and good stability during operation. There will be no noise caused by the collision of components at high speed, which solves the problem that the existing stretching and sealing linkage device is prone to loose sealing. In addition, the device has a simple structure, low processing cost, and is easy to modify existing equipment. The two cam roller mechanisms in this embodiment are both relatively simple linear cams, and can also be implemented with other more complex cam curves or other linear motion pairs. Furthermore, a limiting structure for preventing the connecting rod from rotating in the opposite direction can be set between the two connecting rods of the linkage mechanism.

[0039] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the claims of the utility model.

Claims

1. A stretching and sealing linkage device, comprising a stretching bracket (1), wherein the stretching bracket (1) is provided with a linear drive mechanism, a stretching mechanism and a sealing mechanism; The linkage mechanism is used to link the stretching mechanism and the sealing mechanism, and is characterized in that: The linkage mechanism comprises: A mounting block (15), the mounting block (15) being connected to the stretching mechanism and moving synchronously; A first cam (18), wherein the first cam (18) is fixedly arranged on the stretching bracket (1), and a limiting groove is provided on the first cam (18); a second cam (22), the second cam (22) being connected to the sealing mechanism and moving synchronously, and a limiting groove being provided on the second cam (22); a first connecting rod (16), one end of which is rotatably connected to the mounting block (15); a second connecting rod (17), one end of the second connecting rod (17) being hinged to the first connecting rod (16); A rotating shaft (20), wherein the rotating shaft (20) is fixedly connected to an end of the second connecting rod (17) away from the first connecting rod (16), and both ends of the rotating shaft (20) are respectively matched with the limiting grooves on the first cam (18) and the second cam (22).

2. A stretch sealing linkage device according to claim 1, characterized in that: Both ends of the rotating shaft (20) are respectively sleeved with rollers that match the limiting grooves.

3. A stretch sealing linkage device according to claim 1, characterized in that: The linear drive mechanism comprises a power source (4), a screw rod (6) and a linear guide rail (2); the power source (4) is fixedly arranged on the stretching bracket (1) and drivingly connected to the screw rod (6); a ball nut (7) is threadedly engaged on the screw rod (6); the linear guide rail (2) is fixedly arranged on the stretching bracket (1) and slidingly engaged with a slider 1 (3) and a slider 2 (5); the ball nut (7) is fixedly connected to the slider 1 (3).

4. A stretch-seal linkage device according to claim 3, characterized in that: The stretching mechanism comprises a first mounting seat (8) and a stretching rod (9), the mounting block (15) is fixedly connected to the side of the first mounting seat (8), the first mounting seat (8) is fixedly connected to the slider 1 (3), and the stretching rod (9) is fixedly connected to the first mounting seat (8) and moves up and down to penetrate the valve group (12).

5. A stretch-seal linkage device according to claim 4, characterized in that: The sealing mechanism comprises a second mounting seat (11), a lifting cylinder (10) and a sealing sleeve (14); the second cam (22) is fixedly connected to the second mounting seat (11); the second mounting seat (11) is fixedly connected to the second slider (5); the upper end of the lifting cylinder (10) is fixedly connected to the second mounting seat (11); the lower end is fixedly connected to the sealing sleeve (14); the lifting cylinder (10) is sleeved on the outside of the stretching rod (9) and moves up and down to penetrate the valve group (12).

6. A stretch-seal linkage device according to claim 5, characterized in that: An elastic member (13) is sleeved on the lifting cylinder (10), and the lower end of the elastic member (13) abuts against the sealing sleeve (14).

7. A stretch-seal linkage device according to claim 6, characterized in that: The elastic member (13) is a compression spring or a gas spring.

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