Mechanical self-locking type cover grabbing head device

Abstract

The utility model discloses a mechanical self-locking type cover grabbing head device which comprises a cover grabbing head, the cover grabbing head comprises a connecting section and a grabbing section located below the connecting section, a cover grabbing groove is formed in the bottom of the grabbing section, and at least three sets of self-locking clamping jaws installed at equal angles are arranged in the circumferential direction of the cover grabbing groove. At least two annular grooves are formed in the edge of the grabbing section on the outer side of the self-locking clamping jaw, and reset springs wrapping the outer side of the self-locking clamping jaw are arranged in the annular grooves. Accurate cap grabbing action is carried out on a special-shaped cap structure with large-radius anti-skid teeth, self-locking of a bottle cap is achieved through the acting force of the spring and a customized self-locking clamping jaw structure to prevent the bottle cap from falling off, and cap grabbing can be achieved when the anti-skid teeth of the special-shaped cap are located at the positions of any angles. And the phenomenon that the bottle cap tilts in the cap grabbing head due to extrusion of the anti-skid teeth and the clamping jaws is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging production equipment, in particular to a mechanical self-locking cap grabbing head device. Background Art

[0002] During capping, after the capping head grabs the cap, the capping head rotates to tighten the cap onto the mouth of the filled container, thus sealing the container. A traditional capping head mainly includes a capping mold that matches the cap and a driving mechanism that drives the capping mold up and down. The inner wall of the capping mold is provided with anti-slip teeth that match the anti-slip area of ​​the outer wall of the bottle cap. After the bottle cap is put on by the capping head, the anti-slip teeth of the capping mold mesh with the teeth of the capping mold.

[0003] The cap mold in a traditional capping head is a complete rotating structure with the same inner diameter at the top and bottom. It is usually only suitable for picking up traditional bottle caps with the same outer wall diameter at the top and bottom. However, for some large-sized special-shaped caps with anti-slip teeth, the anti-slip teeth deflect in different directions for each special-shaped cap during transportation, resulting in an offset in the gripping angle between the capping head and the special-shaped cap, causing the cap to be crooked. Utility Model Content

[0004] In order to solve the above technical problems, a mechanical self-locking cap grabbing head device is provided, which can realize complete cap grabbing action at any angle of the anti-slip teeth position during the conveying process of special-shaped caps by utilizing the mechanical self-locking structure.

[0005] To achieve the above-mentioned purpose, the utility model discloses a mechanical self-locking cover grabbing head device, including a cover grabbing head, the cover grabbing head including a connecting section and a grabbing section located below the connecting section, a cover grabbing groove is provided at the bottom of the grabbing section, and at least three groups of self-locking claws installed at equal angles are provided in the circumference of the cover grabbing groove, at least two annular grooves are provided on the edge of the grabbing section outside the self-locking claw, and a reset spring wrapped around the outside of the self-locking claw is provided in the annular groove.

[0006] Furthermore, an axially penetrating connecting hole is provided at the center of the connecting section, and the diameter of the cover grabbing groove is larger than the diameter of the connecting hole.

[0007] Furthermore, the grabbing section is provided with a slot for installing a self-locking claw, the outline of the slot corresponds to the outline of the self-locking claw, and the projected length of the slot on the central symmetric plane of the grabbing head is greater than the maximum straight length of the self-locking claw.

[0008] Furthermore, the self-locking claw includes a fixed section and a clamping section with a height greater than that of the fixed section, and the fixed section is movably sleeved on a pin fixed to the grabbing section.

[0009] Furthermore, a clamping cover surface is provided on the inner side of the fixing section of the self-locking claw, and the clamping cover surface is composed of at least three planes with obtuse angles.

[0010] Furthermore, the end of the clamping section is rounded, and a guide surface is provided at the bottom of the clamping section on the side close to the clamping cover surface, and the guide surface is an inclined surface.

[0011] Compared with the prior art, the beneficial effects produced by the utility model are as follows: the utility model discloses a mechanical self-locking cap grabbing head device, which can accurately grab the cap for the special-shaped cap structure with anti-slip teeth of large radius, realize self-locking of the bottle cap to prevent it from falling off through the action of the spring force and the customized self-locking claw structure, and can grab the cap when the anti-slip teeth of the special-shaped cap are at any angle, avoiding the phenomenon of the bottle cap being crooked in the cap grabbing head due to the squeezing of the anti-slip teeth and the claws. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0013] Figure 1 It is a schematic diagram of the existing special-shaped cover structure.

[0014] Figure 2 This is a schematic diagram of the assembly structure of the utility model.

[0015] Figure 3 It is a schematic diagram of removing the return spring of the cover grabbing head of the present invention.

[0016] Figure 4 This is a schematic diagram of the self-locking claw structure of the utility model.

[0017] In the figure: 1 is the connecting section; 2 is the grabbing section; 21 is the cover grabbing groove; 22 is the clamping groove; 23 is the self-locking claw; 231 is the fixing section; 232 is the clamping section; 233 is the clamping cover surface; 234 is the guide surface; 24 is the annular groove; 3 is the return spring; 4 is the pin shaft. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] An embodiment of the present utility model, as Figure 2 and Figure 3As shown, the cover grabbing head includes a connecting section 1 and a grabbing section 2 located below the connecting section 1. A cover grabbing groove 21 is provided at the bottom of the grabbing section 2. At least three groups of self-locking claws 23 installed at equal angles are provided circumferentially in the cover grabbing groove 21. As a preferred embodiment of the present application, four groups of self-locking claws are provided. At least two annular grooves 24 are provided on the edge of the grabbing section 2 outside the self-locking claws 23. A return spring 3 wrapped around the outside of the self-locking claws 23 is provided in the annular groove 24. Figure 1 The special-shaped cap structure shown in the figure has anti-slip teeth on the edge of the cap body, which can accurately grasp the cap for the special-shaped cap structure with anti-slip teeth of larger radius. The bottle cap is self-locked to prevent it from falling off through the action of the spring force and the customized self-locking claw structure. The cap can be grasped when the anti-slip teeth of the special-shaped cap are at any angle, avoiding the phenomenon of the bottle cap being tilted in the cap grasping head due to the squeezing of the anti-slip teeth and the claws.

[0020] An axially penetrating connecting hole is provided in the center of the connecting section 1 for connecting the driving component of the cap grabbing head. The diameter of the cap grabbing groove 21 is larger than the diameter of the connecting hole.

[0021] A slot 22 for installing a self-locking claw 23 is provided on the grabbing section 2. The outline of the slot 22 corresponds to the outline of the self-locking claw 23. The projected length of the slot 22 on the central symmetry plane of the grabbing head is greater than the maximum straight-line length of the self-locking claw 23, providing a certain rotation space for the self-locking claw to rotate.

[0022] like Figure 4 As shown, the self-locking claw 23 includes a fixed section 231 and a clamping section 232 whose height is greater than that of the fixed section 231. The fixed section 231 is movably sleeved on the pin 4 fixed to the grabbing section 2. When a bottle cap enters the grabbing groove, the self-locking claw is squeezed outward, causing the self-locking claw to rotate around the pin, thereby creating an avoidance space in the grabbing groove to facilitate the bottle cap to enter the grabbing groove completely.

[0023] A cap clamping surface 233 is provided on the inner side of the fixing section 231 of the self-locking claw 23. The cap clamping surface 233 is composed of at least three planes with obtuse angles, which can adapt to the bottle caps of different specifications and diameters for the capping operation and limit the bottle caps within a certain angle.

[0024] The end of the clamping section 232 is chamfered to avoid scratches caused by contact with the bottle cap. A guide surface 234 is provided at the bottom of the clamping section 232 close to the clamping cover surface 233. The guide surface 234 is an inclined surface. When the self-locking claw is in direct contact with the bottle cap, the inclined guide surface makes it easier for the bottle cap to enter the cap grabbing groove.

[0025] The working principle of this embodiment is as follows: for special-shaped covers with anti-slip teeth placed at any angle on the conveyor belt, the cover grabbing head descends after detecting that it is in position, and the guide surface on the self-locking claw abuts against the top of the special-shaped cover. After the cover grabbing head continues to descend, the special-shaped cover exerts an outward force on the self-locking claw bracket, and the self-locking claw overcomes the force of the reset spring and opens outward. At the same time, the clamping section of the self-locking claw squeezes the anti-slip teeth to make the special-shaped cover rotate horizontally until the clamping sections of all the self-locking claws abut against the part of the special-shaped cover between the two adjacent groups of anti-slip teeth. After the effective part of the special-shaped cover completely enters the cover grabbing groove, the elastic force of the reset spring drives the self-locking claw and the clamping surface to clamp the special-shaped cover to achieve self-locking to prevent it from falling off, effectively solving the problem of crooked cover caused by interference between the anti-slip teeth of the special-shaped cover and the traditional fixed claws during the cover grabbing process.

[0026] Several points that need to be explained are: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, which can be mechanical connection or electrical connection, or internal communication between two elements, or direct connection. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the described object changes, the relative position relationship may change; secondly, in this article, relational terms such as first and second are only used to distinguish one entity from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities.

[0027] The above examples are merely illustrative of the present invention and do not limit the scope of protection of the present invention. Any design that is identical or similar to the present invention falls within the scope of protection of the present invention.

Claims

1. A mechanical self-locking cover grabbing head device, comprising a cover grabbing head, characterized in that: The grabbing head comprises a connecting section (1) and a grabbing section (2) located below the connecting section (1); a grabbing groove (21) is provided at the bottom of the grabbing section (2); at least three groups of self-locking claws (23) installed at equal angles are provided circumferentially around the grabbing groove (21); at least two annular grooves (24) are provided on the edge of the grabbing section (2) outside the self-locking claws (23); a return spring (3) is provided in the annular groove (24) and is wrapped around the outside of the self-locking claws (23).

2. The mechanical self-locking cover grabbing head device according to claim 1, characterized in that: The center of the connecting section (1) is provided with an axially penetrating connecting hole, and the diameter of the cover grabbing groove (21) is larger than the diameter of the connecting hole.

3. The mechanical self-locking cover grabbing head device according to claim 1, characterized in that: The grabbing section (2) is provided with a slot (22) for mounting a self-locking claw (23); the outline of the slot (22) corresponds to the outline of the self-locking claw (23); and the projected length of the slot (22) on the central symmetric plane of the grabbing head is greater than the maximum straight length of the self-locking claw (23).

4. The mechanical self-locking cover grabbing head device according to claim 3, characterized in that: The self-locking claw (23) comprises a fixed section (231) and a clamping section (232) having a height greater than that of the fixed section (231); the fixed section (231) is movably sleeved on a pin (4) fixed to the grabbing section (2).

5. The mechanical self-locking cover grabbing head device according to claim 4, characterized in that: A clamping cover surface (233) is provided on the inner side of the fixing section (231) of the self-locking claw (23), and the clamping cover surface (233) is composed of at least three planes with obtuse angles.

6. The mechanical self-locking cover grabbing head device according to claim 4, characterized in that: The end of the clamping section (232) is rounded, and a guide surface (234) is provided at the bottom of the clamping section (232) on the side close to the clamping cover surface (233), and the guide surface (234) is an inclined surface.

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