Cam type screwing mechanism

Abstract

The utility model discloses a cam type screwing mechanism which comprises a cam, a transmission rod and a clamping jaw. The clamping jaw is hinged to the rotary mechanism, can do rotary motion along with the rotary mechanism, and can swing on the rotary mechanism; a gradually-changed cambered surface and a hook block are arranged on the wheel surface of the cam, the outer diameter of the gradually-changed cambered surface is gradually increased in the circumferential direction of the cam, and the hook block is located at the large-diameter end of the gradually-changed cambered surface; one end of the transmission rod is connected with the gradually-changed cambered surface, and the other end of the transmission rod is movably connected with the clamping jaw; when one end of the transmission rod slides along the gradually-changed cambered surface, the push-pull clamping jaw swings on the slewing mechanism; and when the hook block hooks the transmission rod, the cam can drive the clamping jaw to rotate through the transmission rod. According to the utility model, the mechanism can be driven by a single driving source to execute the action of screwing the cover.

Description

Technical Field

[0001] This utility model relates to the field of packaging machinery, and in particular to a cam-type turning mechanism. Background Technology

[0002] In industrial production, there is often a need to tighten or loosen caps. In existing technology, most devices for tightening caps require two actions: clamping the cap and rotating it. Typically, to perform these two actions, two mechanisms are needed to perform the clamping and rotating actions respectively, and correspondingly, two drive sources are required to drive these two mechanisms. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a cam-type screwing mechanism that can be driven by a single drive source to perform the action of screwing the lid.

[0004] Technical Solution: To achieve the above objectives, this utility model provides a cam-type screwing mechanism, comprising a cam, a transmission rod, and a gripper; the gripper is hinged to a rotary mechanism, and can rotate with the rotary mechanism, and can swing on the rotary mechanism; the cam has a gradually changing arc surface and a hook block on its wheel surface, the outer diameter of the gradually changing arc surface gradually increases along the circumference of the cam, and the hook block is located at the large diameter end of the gradually changing arc surface; one end of the transmission rod is connected to the gradually changing arc surface, and the other end of the transmission rod is movably connected to the gripper; when one end of the transmission rod slides along the gradually changing arc surface, the gripper swings on the rotary mechanism; when the hook block hooks the transmission rod, the cam can drive the gripper to rotate through the transmission rod.

[0005] Furthermore, the rotary mechanism is provided with a rod frame, and a sliding hole is opened on the rod frame. The transmission rod passes through the sliding hole accordingly. When one end of the transmission rod slides on the gradually changing arc surface, the transmission rod itself also slides in the sliding hole, thereby pushing and pulling the gripper.

[0006] Furthermore, a contact block is provided at one end of the transmission rod that is in contact with the gradient arc surface, and the side of the contact block that is in contact with the gradient arc surface is also an arc surface, so that the contact block and the gradient arc surface are in surface contact.

[0007] Furthermore, the gripper is provided with a sliding groove; the end of the transmission rod connected to the gripper is provided with an insert rod, which is inserted into the sliding groove; when the transmission rod slides in the sliding hole, it pushes and pulls the gripper through the insert rod.

[0008] Furthermore, the middle part of the gripper is hinged to the rotary mechanism, the slide groove is provided at the upper end of the gripper, and the lower end of the gripper is provided with an arc-shaped clamping block.

[0009] Furthermore, the length of the groove is greater than the outer diameter of the insert rod, and the width of the groove is the same as the outer diameter of the insert rod.

[0010] Furthermore, the inner side of the arc-shaped clamping block has clamping patterns, and the clamping patterns are made of elastic material.

[0011] Beneficial effects: The cam-type screwing mechanism of this utility model has a gradually curved surface and a hook block on the wheel surface of the cam. When the cam rotates, the gradually curved surface can drive the gripper to stick to the cover through the transmission rod, and the hook block can drive the gripper to rotate through the transmission rod, so that the gripper can be driven to screw the cover by a single cam. Attached Figure Description

[0012] Appendix Figure 1 This is a schematic diagram of the cam-type screwing mechanism of this utility model. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] As attached Figure 1 The aforementioned cam-type turning mechanism includes a cam 1, a transmission rod 2, and a gripper 3. The gripper 3 is hinged to a rotary mechanism, and can rotate with the rotary mechanism, and can also swing on the rotary mechanism. The cam 1 has a gradually changing arc surface 4 and a hook block 5 on its wheel surface. The outer diameter of the gradually changing arc surface 4 gradually increases along the circumference of the cam 1, and the hook block 5 is located at the large diameter end of the gradually changing arc surface 4.

[0015] One end of the transmission rod 2 is connected to the gradient arc surface 4, and the other end of the transmission rod 2 is movably connected to the gripper 3. When one end of the transmission rod 2 slides along the gradient arc surface 4, the body of the transmission rod 2 will be displaced, thereby pushing and pulling the gripper 3 to swing on the rotary mechanism. When the hook block 5 hooks the transmission rod 2, the cam 1 will drive the transmission rod 2 to rotate through the hook block 5 when it rotates, and then drive the gripper 3 to rotate through the transmission rod 2.

[0016] In summary, when the cam 1 rotates, the jaw 3 can be driven to swing by the cooperation of the gradually curved surface 4 and the transmission rod 2, so that the jaw 3 can be pressed against the cover. Alternatively, the jaw 3 can be driven to rotate by the cooperation of the hook block 5 and the transmission rod 2, so that the jaw 3 can screw the cover.

[0017] The rotary mechanism is provided with a rod frame 6, and a sliding hole is provided on the rod frame 6. The transmission rod 2 is correspondingly inserted into the sliding hole. When one end of the transmission rod 2 slides on the gradient arc surface 4, the transmission rod 2 itself also slides in the sliding hole, thereby pushing and pulling the gripper 3.

[0018] In one embodiment, the rotary mechanism includes an annular guide rail, on which a sliding seat is disposed. The sliding seat can slide along the annular guide rail, thereby causing the sliding seat to rotate. The rod frame 6 is fixedly mounted on the sliding seat, and the gripper 3 is hingedly mounted on the sliding seat.

[0019] A contact block 7 is provided at one end of the transmission rod 2 that connects with the gradient arc surface 4. The side of the contact block 7 that connects with the gradient arc surface 4 is also an arc surface, so that the contact block 7 and the gradient arc surface 4 are in surface contact.

[0020] The gripper 3 has a sliding groove 9. A rod 8 is provided at the end of the transmission rod 2 connected to the gripper 3, and the rod 8 is inserted into the sliding groove 9. When the transmission rod 2 slides within the sliding hole, it pushes and pulls the gripper 3 via the rod 8. Furthermore, the length of the sliding groove 9 is greater than the outer diameter of the rod 8, and the width of the sliding groove 9 is the same as the outer diameter of the rod 8. When the gripper 3 swings, the rod 8 will also adaptively slide along the length of the sliding groove 9 to adapt to changes in the angle of the gripper 3.

[0021] The middle part of the gripper 3 is hinged to the rotary mechanism. The slide groove 9 is provided at the upper end of the gripper 3, and the lower end of the gripper 3 is provided with an arc-shaped clamping block 10. During the process of the contact block 7 moving from the small diameter end to the large diameter end of the gradient arc surface 4, the upper end of the gripper 3 swings away from the cam 1, and the lower end of the gripper 3 swings towards the cam 1, so that the arc-shaped clamping block 10 at the lower end of the gripper 3 can abut against the cover.

[0022] The inner side of the arc-shaped clamp 10 has clamping texture, and the clamping texture is made of elastic material, so that the arc-shaped clamp 10 can fit more tightly against the cover, so that the cover can be screwed when the clamp 3 rotates.

[0023] One working method of this utility model is as follows: The cap is placed on the bottle mouth, and the bottle is fixed. Then, the cam 1 rotates, causing the contact block 7 to gradually move from the small diameter end of the gradient arc surface 4 to the large diameter end. During this process, the transmission rod 2 slides in the sliding hole of the rod holder 6. The transmission rod 2 pushes the upper end of the gripper 3 to swing away from the cam 1, while the lower end of the gripper 3 swings towards the cam 1, so that the arc-shaped gripper 10 abuts against the side contour surface of the cap. Then, the cam 1 continues to rotate, and the hook block 5 on the cam 1 hooks the contact block 7, thereby driving the gripper 3 to rotate, so that the gripper 3 screws the cap. After screwing, the cam 1 rotates in the opposite direction, causing the gripper 3 to disengage from the cap.

[0024] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A cam-type screwing mechanism, characterized by: The utility model provides a cam (1), transmission rod (2) and clamp jaw (3), clamp jaw (3) is hinged to be installed on the rotating mechanism, and clamp jaw (3) can rotate with the rotating mechanism, and clamp jaw (3) can swing on the rotating mechanism, cam (1) has gradually changing cambered surface (4) and hook block (5) on the wheel surface, the outer diameter of gradually changing cambered surface (4) gradually increases along the circumference of cam (1), and hook block (5) is located at the large diameter end of gradually changing cambered surface (4), one end of transmission rod (2) is connected with gradually changing cambered surface (4), and the other end of transmission rod (2) is movably connected with clamp jaw (3), when one end of transmission rod (2) slides along gradually changing cambered surface (4), push-pull clamp jaw (3) swings on the rotating mechanism, when hook block (5) hooks transmission rod (2), cam (1) can drive clamp jaw (3) to rotate through transmission rod (2).

2. A cam-type screwing mechanism according to claim 1, characterized in that: The rotating mechanism is provided with a rod holder (6), the rod holder (6) is provided with a sliding hole, and the transmission rod (2) is correspondingly arranged in the sliding hole; when one end of the transmission rod (2) slides along the gradually changing cambered surface (4), the transmission rod (2) also slides in the sliding hole, so as to push and pull the clamp jaw (3).

3. A cam-type screwing mechanism according to claim 2, characterized in that: One end of the transmission rod (2) is provided with a contact block (7), and the side, where the contact block (7) is connected with the gradually changing cambered surface (4), is also an arc surface, so that the contact block (7) and the gradually changing cambered surface (4) are in surface contact.

4. A cam-type screwing mechanism according to claim 2, characterized in that: The clamp jaw (3) is provided with a sliding groove (9), one end of the transmission rod (2) is provided with an insertion rod (8), the insertion rod (8) is correspondingly arranged in the sliding groove (9), and the transmission rod (2) slides in the sliding hole; when the transmission rod (2) slides in the sliding hole, the clamp jaw (3) is pushed and pulled through the insertion rod (8).

5. A cam-type screwing mechanism according to claim 4, characterized in that: The middle part of the clamp jaw (3) is hingedly connected with the rotating mechanism, the sliding groove (9) is arranged at the upper end of the clamp jaw (3), and the lower end of the clamp jaw (3) is provided with an arc-shaped clamping block (10).

6. A cam-type screwing mechanism according to claim 5, characterized in that: The length of the sliding groove (9) is greater than the outer diameter of the insertion rod (8), and the width of the sliding groove (9) is consistent with the outer diameter of the insertion rod (8).

7. A cam-type screwing mechanism according to claim 5, characterized in that: The inner side of the arc-shaped clamping block (10) is provided with clamping lines, and the clamping lines are made of elastic material.

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