Bottle cap clamping fixture and capping device

Abstract

This utility model provides a bottle cap clamping fixture and a capping device. The bottle cap clamping fixture includes: a hollow rotating column with a multi-stage inner hole and three equally spaced axial grooves on the outer surface of its lower end, each axial groove communicating with a fourth hole segment; a mounting handle with its lower end installed in a first hole segment; a jaw assembly including three jaws rotatably installed in the three axial grooves and a return elastic ring sleeved on the outer side of the upper end of the three jaws; and a push rod assembly including a piston, a push rod, and a return spring. The inner side of the upper end of each jaw extends into the corresponding fourth hole segment, and the lower end has an arc-shaped inner surface. The piston is movably installed in a second hole segment. The upper end of the push rod is fixedly connected to the piston, and the lower end extends downward into the fourth hole segment. The return spring is sleeved on the outer side of the push rod, with its two ends abutting against the third step and the lower surface of the piston, respectively. The mounting handle has an axial air inlet.

Description

Technical Field

[0001] This utility model belongs to the technical field of emulsion filling equipment, specifically relating to a bottle cap clamping fixture and a capping device including the bottle cap clamping fixture. Background Technology

[0002] In the emulsion filling industry, the capping device is a crucial component of the filling machine. Existing capping devices typically employ belt capping. While belt capping allows for flexible twisting of the cap without damage, the clamping force becomes unstable and uncontrollable as the belt stretches, leading to problems such as caps not tightening properly or tightening too much, causing them to crack. Therefore, developing a cap clamping fixture capable of stable cap clamping with easily adjustable clamping force has become an urgent technical challenge for those skilled in the art. Utility Model Content

[0003] To address the shortcomings of the prior art, the present invention aims to provide a bottle cap clamping fixture and a cap screwing device including the bottle cap clamping fixture.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] Option 1

[0006] This utility model provides a bottle cap clamping fixture, which is installed on the rotating mechanism of a capping device. It is used to clamp bottle caps and rotate them under the drive of the rotating mechanism. The fixture includes: a hollow rotating column with an inner hole that is a multi-stage hole with the diameter decreasing from top to bottom; three axial grooves evenly spaced along the circumference of the lower end of the column on its outer surface; each axial groove extending upwards from the lower end face of the hollow rotating column and communicating with the fourth segment of the multi-stage hole; a mounting handle, the lower end of which is installed in the first segment of the multi-stage hole, and the upper end for connection to the rotating mechanism; and a gripper assembly comprising grippers rotatably mounted in the three axial grooves. The device comprises three grippers within a groove, a return elastic ring fitted around the upper end of the three grippers, and a push rod assembly including a piston, a push rod, and a return spring. The inner portion of the upper end of each gripper extends into the corresponding fourth hole section, and the lower end, used as a clamping end, has an arc-shaped inner surface that matches the bottle cap. The piston is movably mounted within the second hole section of the multi-stage hole. The upper end of the push rod is fixedly connected to the piston, and the lower end extends downward into the fourth hole section. The return spring is fitted around the outside of the push rod, with its two ends abutting against the third step of the multi-stage hole and the lower surface of the piston, respectively. The mounting handle has an axial air inlet for connecting to an external pressurized air generating device.

[0007] The bottle cap clamping fixture provided by this utility model may also have the following feature: the lower end of the push rod is shaped like an inverted cone.

[0008] The bottle cap clamping fixture provided by this utility model may also have the following feature: the outer surface of the part of the hollow rotating column corresponding to the upper end of the gripper is provided with an annular groove, and the reset elastic ring is located in the annular groove.

[0009] The bottle cap clamping fixture provided by this utility model may also have the following feature: wherein the reset elastic ring is an elastic rubber ring.

[0010] The bottle cap clamping fixture provided by this utility model may also have the following feature: wherein the mounting handle is a first-order shaft with the shaft diameter increasing sequentially from top to bottom.

[0011] The bottle cap clamping fixture provided by this utility model may also have the following feature: the outer surface of the first-order shaft located at the step is formed with an annular flange that matches the upper end face of the hollow rotating column.

[0012] The bottle cap clamping fixture provided by this utility model may also have the following feature: an elastic rubber pad is provided on the arc-shaped inner side of the gripper.

[0013] The bottle cap clamping fixture provided by this utility model may also have the following features: the elastic rubber pad has a pad body that fits on the inner side of the arc and a plurality of raised strips formed on the outer side of the pad body. The inner side of the arc is provided with a plurality of mounting grooves that match the plurality of raised strips respectively, and the plurality of raised strips are respectively embedded in the corresponding plurality of mounting grooves.

[0014] Option Two

[0015] This utility model also provides a capping device, characterized by including: a rotating mechanism; and a cap clamping fixture (Solution 1), which is installed on the rotating mechanism to clamp the cap and drive it to rotate under the drive of the rotating mechanism.

[0016] Functions and effects of utility models

[0017] According to the bottle cap clamping fixture and the capping device including the bottle cap clamping fixture of this utility model, it has a hollow rotating column, a mounting handle, a gripper assembly, and a push rod assembly. The inner hole of the hollow rotating column is a multi-stage hole with the diameter decreasing from top to bottom. The lower end is provided with three axial grooves arranged at equal intervals along its circumference. The three grippers of the gripper assembly are rotatably mounted in the three axial grooves respectively. The inner side of the upper end of each gripper extends into the corresponding fourth hole segment. The lower end, used as the clamping end, has an arc-shaped inner surface that matches the bottle cap. The push rod assembly includes a piston and a push rod. The device is mounted in the second hole section. The upper end of the push rod is fixedly connected to the piston, and the lower end extends downward into the fourth hole section. The mounting handle has an axial air inlet, which can be connected to an external compressed air generating device. On the one hand, the circumferentially evenly spaced arrangement of the three grippers, and the cylinder structure formed by the piston and push rod being built into the inner hole of the hollow rotating column, enable the bottle cap clamping fixture to clamp the bottle cap evenly and stably. On the other hand, the axial air inlet of the mounting handle is used in conjunction with the external air generating device. By controlling the pressure generated by the air generating device, the clamping force on the bottle cap can be easily adjusted. Moreover, the structure is simple and the operation is convenient. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the bottle cap clamping fixture in an embodiment of this utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the bottle cap clamping fixture in an embodiment of this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the hollow rotating column in an embodiment of this utility model;

[0021] Figure 4 This is an assembly diagram of the gripper and the hollow rotating column in an embodiment of this utility model;

[0022] Figure 5 This is a schematic diagram of the planar structure of the bottle cap clamping fixture in an embodiment of this utility model; and

[0023] Figure 6 yes Figure 5 Cross-sectional view of the hollow rotating column and mounting handle along line AA. Detailed Implementation

[0024] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model.

[0025] <Example>

[0026] like Figure 1 , Figure 2 , Figure 5 as well as Figure 6 As shown, in this embodiment, the bottle cap clamping fixture 10 is mounted on the rotating mechanism (not shown) of the capping device. It is used to clamp the round bottle cap and drive the bottle cap to rotate under the drive of the rotating mechanism, thereby realizing the capping function. The bottle cap clamping fixture 10 includes a hollow rotating column 11, a mounting handle 12, a gripper assembly 13, and a push rod assembly 14.

[0027] like Figures 1 to 6 As shown, the hollow rotating column 11 is used to install the mounting handle 12, the gripper assembly 13, and the push rod assembly 14. It has an inner hole extending along its axis. The inner hole is a multi-stage hole, having at least a first hole section 111a, a second hole section 111b, a third hole section 111c, and a fourth hole section 111d with the hole diameter decreasing from top to bottom.

[0028] The lower end of the hollow rotating column 11 has three axial grooves 112 arranged at equal intervals along its circumference on its outer surface. Each axial groove 112 extends upward from the lower end face of the hollow rotating column 11 and is connected to the fourth hole segment 111d of the multi-stage hole 111.

[0029] In this embodiment, the outer surface of the hollow rotating column 11 located at the lower end of the fourth hole section 111 is provided with an annular groove 113.

[0030] like Figures 1 to 3 , Figure 5 as well as Figure 6 As shown, the mounting handle 12 is used to mount the hollow rotating column 11 onto the rotating mechanism of the capping device. Its lower end is installed in the first hole section 111a of the inner hole of the hollow rotating column 11, and its upper end is used to connect with the rotating mechanism. The mounting handle 12 has an axial air inlet 121 for connecting to an external pressure air generating device.

[0031] In this embodiment, the mounting handle 12 is a first-order shaft with the shaft diameter increasing from top to bottom. The outer surface of the first-order shaft at the step has an annular flange 122 that matches the upper end face of the hollow rotating column 11. The lower surface of the annular flange 122 is attached to the upper end face of the hollow rotating column 11.

[0032] In this embodiment, a sealing ring 123 is also provided between the mounting handle 12 and the first hole segment 111a.

[0033] like Figure 1 , Figure 2 , Figure 4 as well as Figure 5 As shown, the gripper assembly 13 includes three grippers 131 and a reset elastic ring 132.

[0034] Three grippers 131 are rotatably mounted in three axial grooves 112 via mounting shafts 131a. The inner portion of the upper end of each gripper 131 extends into the corresponding fourth hole segment 111d, and the lower end, which serves as a clamping end, has an arc-shaped inner surface that matches the bottle cap.

[0035] In this embodiment, the inner arcuate surface of the gripper 131 is further provided with an elastic rubber pad 131a made of modified silicone. The elastic rubber pad 131a has a pad body 131b that conforms to the inner arcuate surface of the gripper 131, and three raised strips 131c formed on the outer surface of the pad body 131b. The inner arcuate surface of the gripper 131 is provided with three mounting grooves 131d that respectively match the three raised strips 131c. The elastic rubber pad 131a is fixedly mounted on the inner arcuate surface of the gripper 131 by means that the three raised strips 131c are respectively embedded in the corresponding three mounting grooves 131d.

[0036] The reset elastic ring 132 is an elastic rubber ring located inside the annular groove 113 and sleeved on the outside of the upper ends of the three grippers 131. In this embodiment, the outer part of the upper end of the grippers 131 is also provided with a mounting groove 131b that matches the reset elastic ring 132.

[0037] like Figure 6 As shown, the push rod assembly 14 includes a piston 141, a push rod 142, and a return spring 143.

[0038] The piston 141 is movably installed in the second bore section 111b of the inner bore 11.

[0039] The upper end of the push rod 142 is fixedly connected to the lower surface of the piston 141 by a fixing screw 142a, and the lower end extends downward through the third hole section 111c into the fourth hole section 111d. In this embodiment, the lower end of the push rod 142 is shaped like an inverted cone.

[0040] The return spring 143 is sleeved on the outside of the push rod 142, and its two ends abut against the third step 111e of the inner hole 111 and the lower surface of the piston 142, respectively.

[0041] In this embodiment, the working principle of the bottle cap clamping fixture 10 is as follows:

[0042] In step S1, when the bottle cap clamping fixture 10 is directly above the bottle cap to be gripped, the lifting mechanism of the capping device drives the bottle cap clamping fixture 10 to descend, causing the bottle cap to enter the space enclosed by the lower ends of the three grippers 131. At this time, under the elastic action of the reset elastic ring 132, the upper ends of the three grippers 131 are in an inward closing state, and the lower ends are in an outward opening state.

[0043] In step S2, the external compressed air generating device operates, allowing compressed air to enter the second hole section 111b of the hollow rotating column 11 through the axial air inlet 121 of the mounting handle 12. This pushes the piston 141 downward within the second hole section 111b, thereby causing the push rod 142 to descend. This causes the lower end of the push rod 142 to open outward against the elastic force of the reset elastic ring 132, and then close inward, thereby clamping the bottle cap and realizing the cap removal action.

[0044] In step S3, the lifting mechanism works again to drive the bottle cap clamping fixture 10 to rise back to the initial height, and then the lateral movement mechanism of the capping device works to drive the bottle cap clamping fixture 10 to move laterally to directly above the bottle containing the emulsion.

[0045] In step S3, the lifting mechanism works again to drive the bottle cap clamping fixture 10 to descend. At the same time, the rotating mechanism of the capping device works to drive the bottle cap clamping fixture 10 to rotate, thereby driving the bottle cap to rotate, thus tightening the bottle cap on the bottle mouth and realizing the capping action.

[0046] In step S4, after the bottle cap is tightened, the compressed air generating device stops working, and the three grippers 131 return to their original position with the upper end closed inward and the lower end open under the elastic action of the reset elastic ring 132, thereby loosening the bottle cap. At the same time, the rotating mechanism stops working.

[0047] In step S5, the lifting mechanism operates again to raise the bottle cap clamping fixture 10 to its initial height, and the traversing mechanism operates again to move the bottle cap clamping fixture 10 to its initial position for the next cap removal action. This completes the capping process for one bottle.

[0048] Functions and effects of the embodiments

[0049] According to the bottle cap clamping fixture and the capping device including the bottle cap clamping fixture involved in this embodiment, it has a hollow rotating column, a mounting handle, a gripper assembly, and a push rod assembly. The inner hole of the hollow rotating column is a multi-stage hole with the diameter decreasing from top to bottom. The lower end is provided with three axial grooves arranged at equal intervals along its circumference. The three grippers of the gripper assembly are rotatably mounted in the three axial grooves respectively. The inner side of the upper end of each gripper extends into the corresponding fourth hole segment. The lower end, used as the clamping end, has an arc-shaped inner surface that matches the bottle cap. The push rod assembly includes a piston and a push rod, and the plug is movable. Installed in the second section, the upper end of the push rod is fixedly connected to the piston, and the lower end extends downward into the fourth section. The mounting handle has an axial air inlet, which can be connected to an external compressed air generator. On the one hand, the circumferentially evenly spaced arrangement of the three grippers, and the cylinder structure formed by the piston and push rod being built into the inner hole of the hollow rotating column, enable the bottle cap clamping fixture to clamp the bottle cap evenly and stably. On the other hand, the axial air inlet of the mounting handle is used in conjunction with the external air generator, and the clamping force on the bottle cap can be easily adjusted by controlling the pressure generated by the air generator. Moreover, the structure is simple and the operation is convenient.

[0050] In addition, because the lower end of the push rod is shaped like an inverted cone, it is easy for the push rod to be smoothly inserted into the space enclosed by the upper ends of the three jaws, which further improves the reliability and stability of the tooling operation.

[0051] In addition, because the outer surface of the part corresponding to the upper end of the gripper on the hollow rotating column is provided with an annular groove, and the reset elastic ring is located in the annular groove, the tooling structure is more compact, and the reset elastic ring will not easily slip off.

[0052] In addition, because the mounting handle is a first-order shaft with the shaft diameter increasing from top to bottom, the outer surface of the first-order shaft at the step has an annular flange that matches the upper end face of the hollow rotating column, which further improves the stability and reliability of the connection between the mounting handle and the hollow rotating column.

[0053] In addition, because the inner curved surface of the gripper is equipped with an elastic rubber pad, which has high elasticity and coefficient of friction, the bottle cap will not slip off when rotating at high speed, and no clamping marks will be left on the bottle cap.

[0054] Furthermore, because the elastic rubber pad has a pad body that fits onto the inner side of the arc and multiple raised strips formed on the outer side of the pad body, and multiple mounting grooves that match the multiple raised strips respectively on the inner side of the arc, the multiple raised strips are respectively embedded in the corresponding multiple mounting grooves, which further improves the stability and reliability of the connection between the elastic rubber pad and the gripper.

[0055] The above embodiments are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model.

Claims

1. A bottle cap clamping tool provided on a rotating mechanism of a cap screwing device, for clamping a bottle cap and rotating the bottle cap under the drive of the rotating mechanism, characterized in that, include: A hollow rotating column has an inner hole with a multi-stage hole whose diameter decreases from top to bottom. The outer surface of the lower end is provided with three axial grooves that are equally spaced along the circumference of the hollow rotating column. Each axial groove extends upward from the lower end face of the hollow rotating column and is connected to the fourth hole segment of the multi-stage hole. The mounting handle has its lower end installed in the first hole section of the multi-stage hole, and its upper end used to connect with the rotating mechanism. The gripper assembly includes three grippers rotatably mounted in the three axial grooves, and a reset elastic ring sleeved on the upper end of the three grippers. as well as The push rod assembly includes a piston, a push rod, and a return spring. The upper end of each gripper has an inner portion extending into the corresponding fourth hole segment, and the lower end, used as a clamping end, has an arc-shaped inner surface that matches the bottle cap. The piston is movably installed within the second section of the multi-stage bore. The upper end of the push rod is fixedly connected to the piston, and the lower end extends downward into the fourth hole section. The return spring is sleeved on the outside of the push rod, with its two ends abutting against the third step of the multi-stage hole and the lower surface of the piston, respectively. The mounting handle has an axial air inlet for connecting to an external pressurized air generating device.

2. The bottle cap clamping fixture according to claim 1, characterized in that: in, The lower end of the top rod is shaped like an inverted cone.

3. The bottle cap clamping fixture according to claim 1, characterized in that: in, The outer surface of the portion of the hollow rotating column corresponding to the upper end of the gripper is provided with an annular groove. The reset elastic ring is located within the annular groove.

4. The bottle cap clamping fixture according to claim 1, characterized in that: in, The reset elastic ring is an elastic rubber ring.

5. The bottle cap clamping fixture according to claim 1, characterized in that: in, The mounting handle is a first-order shaft with the shaft diameter increasing sequentially from top to bottom.

6. The bottle cap clamping fixture according to claim 5, characterized in that: in, The outer surface of the first-order shaft at the step has an annular flange that matches the upper end face of the hollow rotating column.

7. The bottle cap clamping fixture according to claim 1, characterized in that: in, The inner arc-shaped surface of the gripper is also provided with an elastic rubber pad.

8. The bottle cap clamping fixture according to claim 7, characterized in that: in, The elastic rubber pad has a pad body that adheres to the inner arc-shaped surface and a plurality of raised strips formed on the outer surface of the pad body. The arc-shaped inner surface is provided with multiple mounting grooves that respectively match the plurality of raised strips. The plurality of raised strips are respectively embedded in the corresponding plurality of mounting grooves.

9. A capping device, characterized in that, include: Rotating mechanism; as well as The bottle cap clamping fixture according to any one of claims 1 to 8 is installed on the rotating mechanism for clamping the bottle cap and driving the bottle cap to rotate under the drive of the rotating mechanism.

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