Split type ball head fixing structure and parallel arm

Abstract

The utility model discloses a split type ball head fixing structure and a parallel arm, the ball head fixing structure comprises a connector, the connector is of a split type structure, the connector comprises a first connector and a second connector, an arc-shaped section for accommodating a ball head is formed between the first connector and the second connector, and the arc-shaped section is connected with the first connector and the second connector. A groove convenient for clamping the ball head is also formed between the first connector and the second connector; the parallel connection arm comprises a first connection arm and a second connection arm which are arranged in parallel, and the first connection arm and the second connection arm are connected through a second elastic piece; the utility model has the beneficial effects that the connector is designed into a split structure, so that the ball head can be conveniently arranged in the arc-shaped section, and does not need to be pressed into the arc-shaped section by using a jacking machine, and the assembly procedures are reduced.

Description

Technical Field

[0001] The utility model relates to the field of 3D printing equipment, in particular to a split ball head fixing structure and a parallel arm. Background Art

[0002] 3D printing, also known as additive manufacturing (AM), is a type of rapid prototyping technology. It is a direct manufacturing technology based on digital model files that can produce three-dimensional entities of almost any shape. 3D printing uses powdered metal or plastic and other bondable materials to construct objects by stacking and accumulating layer by layer, which is called "additive manufacturing".

[0003] Among the existing 3D printing equipment, the mainstream structures include cross-axis type, gantry type, XZ-Y plate type, parallel arm type, etc. Among them, the parallel arm type 3D printer is popular due to its advantages such as easy leveling, fast nozzle movement speed and accurate arc movement. The 3D printer with parallel arm structure connects the sliding component and the extruder through three parallel arm groups. The ball head of the parallel arm is connected to the main slide rail and the print head of the printer. During the printing process, as the parallel arm moves up and down, left and right, and forward and backward, the ball head needs to rotate continuously. After long-term use, a gap is likely to appear at the connection between the ball head and the parallel arm connector, which leads to poor printing quality.

[0004] In addition, during the installation of the existing parallel arm, the ball head is mainly installed into the connector by external force crimping, which requires additional steps and the use of special constant pressure equipment, resulting in an increase in assembly steps and affecting assembly efficiency. Summary of the invention

[0005] The utility model aims to provide a split ball head fixing structure and a parallel arm, which can not only conveniently install the ball head into the connecting head, but also avoid the occurrence of a gap at the connection between the ball head and the connecting head after long-term use, thereby improving printing accuracy.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A split ball head fixing structure comprises a connecting head, wherein the connecting head is a split structure and comprises a first connecting head and a second connecting head, wherein an arc section for accommodating the ball head is formed between the first connecting head and the second connecting head.

[0008] Preferably, a groove for facilitating clamping of the ball head is formed between the first connector and the second connector.

[0009] Preferably, the device further comprises a clamping rod connecting the first connecting head and the second connecting head.

[0010] Preferably, a first positioning plate is provided on the side wall of the first connector, and a second positioning plate is provided on the side wall of the second connector. Pin holes are provided in both the first positioning plate and the second positioning plate, and a pin is passed through the pin hole.

[0011] Preferably, a positioning groove is provided on the second connecting head, and a protrusion which can rotate along the positioning groove is provided on the first connecting head.

[0012] Preferably, the first positioning plates are provided at two locations, and a cavity for accommodating the second positioning plate is formed between the two first positioning plates.

[0013] Preferably, the first connector and the second connector are connected by bonding, and a groove for facilitating glue application is provided at the connection between the first connector and the second connector.

[0014] Preferably, a fixing rod for auxiliary connection is further provided between the first connecting head and the second connecting head.

[0015] Preferably, a fixing groove is formed between the first connector and the second connector, a first elastic member is arranged in the fixing groove, and two ends of the first elastic member are respectively connected to the first connector and the second connector.

[0016] The utility model also provides a parallel arm, comprising a first connecting arm and a second connecting arm arranged in parallel, wherein the first connecting arm and the second connecting arm are connected via a second elastic member;

[0017] The first link arm and the second link arm both include a connecting rod, and the end of the connecting rod is provided with the aforementioned 3D printer ball head fixing structure;

[0018] The connecting head is provided with a connecting rod hole for accommodating the connecting rod, the connecting head side wall is provided with a connecting slot for fixing the second elastic member, and the connecting slot is provided with a fixing hole connected to the end of the second elastic member.

[0019] The beneficial effects of the utility model are:

[0020] 1. The connector is designed as a split structure, so the ball head can be easily installed into the arc segment without the need to use a dedicated constant pressure device to press the ball head in, thus reducing the assembly process.

[0021] 2. The first fixing plate and the second fixing plate are fixed by a pin shaft, thereby avoiding shaking of the first connecting head and the second connecting head and ensuring printing accuracy.

[0022] 3. When the ball head is worn during use, resulting in a gap between the ball head and the arc segment, the clamping rod can be tightened so that the arc segment can clamp the ball head again.

[0023] 4. The first link arm and the second link arm are connected by the second elastic member to form a parallelogram with uniform force. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional diagram of the first embodiment;

[0025] Figure 2 It is a left side view of the first embodiment;

[0026] Figure 3 It is a stereogram of the second embodiment;

[0027] Figure 4 It is a bottom view of the second embodiment;

[0028] Figure 5 It is a three-dimensional diagram of embodiment 3;

[0029] Figure 6 This is a front view of Embodiment 3;

[0030] Figure 7 is a partial cross-sectional view of the connector;

[0031] Figure 8 A three-dimensional diagram of the parallel arm.

[0032] The reference numerals are as follows:

[0033] 1. Connecting head 11, groove 12, arc segment 13, connecting rod hole 2, ball head 21, ball head rod 3, clamping rod 4, connecting slot 41, fixing hole 5, first connecting head 51, protrusion 6, second connecting head 61, positioning slot 7, first positioning plate 71, pin hole 8, second positioning plate 14, groove 15, fixing rod 17, fixing slot 18, first elastic member 100, first link arm 200, second link arm 300, second elastic member 101, connecting rod.

[0034] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. DETAILED DESCRIPTION

[0035] The utility model is further described below in conjunction with the accompanying drawings.

[0036] Embodiment 1

[0037] like Figure 1 and Figure 2As shown, a split ball head fixing structure of this embodiment includes a connecting head 1. The connecting head 1 is a split structure, including a first connecting head 5 and a second connecting head 6. An arc segment 12 for accommodating the ball head 2 is formed between the first connecting head 5 and the second connecting head 6. The ball head 2 has a ball head rod 21.

[0038] In order to ensure that the arc segment 12 can clamp the ball head 2 after the ball head 2 is installed in the arc segment 12 , a groove 11 is provided between the first connector 5 and the second connector 6 to ensure the clamping effect of the arc segment 12 on the ball head 2 .

[0039] One of the first connector 5 and the second connector 6 can be moved or rotated relative to the other to open or close the arc segment 12. When opened, the ball head 2 can be easily loaded or removed, and when closed, the ball head 2 can be clamped to facilitate printing operations.

[0040] To facilitate the rotation of the first connector 5 and the second connector 6, a positioning groove 61 is provided on the second connector 6, and a protrusion 51 that can rotate along the positioning groove 61 is provided on the first connector 5, so that the first connector 5 can rotate relative to the second connector 6 to realize the opening and closing of the arc segment 12.

[0041] In some embodiments, the positioning groove 61 may be provided on the first connector 5 , and the protrusion 51 may be provided on the second connector 6 , so that the relative rotation of the first connector 5 and the second connector 6 can be achieved.

[0042] In order to ensure that the first connecting head 5 is rotated to a suitable position relative to the second connecting head 6 to ensure that the arc segment 12 is closed, a first positioning plate 7 is provided on the side wall of the first connecting head 5, and a second positioning plate 8 is provided on the side wall of the second connecting head 6. Pin holes 71 are provided in the first positioning plate 7 and the second positioning plate 8. When the first connecting head 5 is rotated to a suitable position relative to the second connecting head 6, the two pin holes 71 are concentric and the pins can be inserted to achieve the closed positioning of the arc segment 12.

[0043] In certain embodiments, such as Figure 5 and Figure 6 As shown, the first positioning plate 7 can also be set at two locations, and a cavity for accommodating the second positioning plate 8 is formed between the two first positioning plates 7. In this way, when the pin is inserted into the pin hole 71, the appearance of the device can be made more beautiful, and the first positioning plate 7 and the second positioning plate 8 no longer protrude from the side wall of the connector 1.

[0044] Similarly, the second positioning plates 8 may be disposed at two locations, forming a cavity for accommodating the first positioning plates 7 therebetween.

[0045] In order to ensure that the ball head 2 is clamped when the arc segment 12 is closed, a clamping rod 3 is provided between the first connector 5 and the second connector 6. One of the first connector 5 and the second connector 6 is connected to the clamping rod 3 by a thread. The inner wall of one of the first connector 5 and the second connector 6 is provided with a light hole for the clamping rod 3 to pass through. When the clamping rod 3 is tightened, the width of the groove 11 between the first connector 5 and the second connector 6 can be reduced, thereby ensuring that the arc segment 12 can fit tightly with the ball head 2. When the ball head 2 is worn due to long-term use and a gap appears between the ball head 2 and the arc segment 12, the clamping rod 3 can be tightened to make the two fit tightly again.

[0046] like Figure 8 As shown, this embodiment also provides a parallel arm, including a first link arm 100 and a second link arm 200 arranged in parallel. The first link arm 100 and the second link arm 200 have the same structure and are connected by a second elastic member 300. The second elastic member 300 can use a spring or a tension spring, so that the parallel arm forms a parallelogram structure during the printing process, which has a certain stability.

[0047] The first link arm 100 and the second link arm 200 both include a connecting rod 101, and the end of the connecting rod 101 is provided with the aforementioned 3D printer ball head fixing structure;

[0048] like Figure 7 As shown, a connecting rod hole 13 is provided in the second connecting head 6, and the connecting rod 101 extends into the connecting rod hole 13 and is connected to the connecting head 1. A connecting slot 4 is provided on the side wall of the connecting head 1, and a fixing hole 41 is opened in the connecting slot 4. The fixing hole 41 is used to connect the end of the second elastic member 300, so that the second elastic member 300 can be installed and fixed between two symmetrically arranged ball head fixing structures on the first link arm 100 and the second link arm 200.

[0049] Embodiment 2

[0050] like Figure 3 and Figure 4 As shown, a split ball head fixing structure of this embodiment includes a connector 1, which is a split structure, including a first connector 5 and a second connector 6 bonded to each other, an arc segment 12 for accommodating the ball head 2 is formed between the first connector 5 and the second connector 6, the ball head 2 has a ball head rod 21, and a groove 14 for convenient glue application is provided at the connection between the first connector 5 and the second connector 6, so that the bonding between the two is more firm;

[0051] During assembly of this embodiment, an arc segment 12 is formed between the first connector 5 and the second connector 6. The ball head 2 is first placed between the first connector 5 and the second connector 6, and then the two are bonded relative to each other to fix the ball head 2 in the arc segment 12 formed therebetween.

[0052] A groove 11 is provided between the first connector 5 and the second connector 6 to facilitate clamping of the ball head.

[0053] A clamping rod 3 is further provided between the first connecting head 5 and the second connecting head 6 to ensure that the first connecting head 5 and the second connecting head 6 are tightly connected.

[0054] In order to prevent the first connector 5 and the second connector 6 from being cracked during use, an auxiliary connection fixing rod 15 is also provided between the two. The fixing rod 15 can be provided at multiple locations to ensure a reliable connection between the two.

[0055] In order to ensure the reliability of the bonding process between the first connector 5 and the second connector 6, a first positioning plate 7 and a second positioning plate 8 may also be respectively provided on the side walls of the first connector 5 and the second connector 6.

[0056] like Figure 7 and Figure 8 As shown, this embodiment also provides a parallel arm, including a first link arm 100 and a second link arm 200 arranged in parallel. The first link arm 100 and the second link arm 200 have the same structure and both include a connecting rod 101. The end of the connecting rod 101 is provided with the aforementioned 3D printer ball head fixing structure.

[0057] The connecting rod hole 13 accommodating the end of the connecting rod 101 is respectively arranged in the first connecting head 5 and the second connecting head 6, and the two are bonded to form a complete connecting rod hole 13. The connecting slot 4 connected to the end of the second elastic member 300 is also respectively arranged on the side walls of the first connecting head 5 and the second connecting head 6, and the two are bonded to form a complete connecting slot 4.

[0058] Embodiment 3

[0059] like Figure 5 and Figure 6 As shown, a split ball head fixing structure of this embodiment includes a connector 1, which is a split structure, including a first connector 5 and a second connector 6 bonded to each other, an arc segment 12 for accommodating the ball head 2 is formed between the first connector 5 and the second connector 6, and a groove 14 for convenient glue application is provided at the connection between the first connector 5 and the second connector 6;

[0060] In order to ensure the reliability of the bonding process between the first connector 5 and the second connector 6, a first positioning plate 7 and a second positioning plate 8 may be respectively provided on the side walls thereof, and a fixing rod 15 for auxiliary connection may be provided between the two.

[0061] In order to ensure the clamping effect of the arc segment 12 on the ball head 2, a fixing groove 17 is also formed between the first connecting head 5 and the second connecting head 6. A first elastic member 18 is arranged in the fixing groove 17. The first elastic member 18 can be a spring or a tension spring. The two ends of the first elastic member 18 are respectively connected to the first connecting head 5 and the second connecting head 6 to achieve tensioning of the two and ensure the clamping force on the ball head 2.

[0062] like Figure 7 and Figure 8 As shown, this embodiment also provides a parallel arm, including a first link arm 100 and a second link arm 200 arranged in parallel. The first link arm 100 and the second link arm 200 have the same structure and both include a connecting rod 101. The end of the connecting rod 101 is provided with the aforementioned 3D printer ball head fixing structure.

[0063] The connecting rod hole 13 accommodating the end of the connecting rod 101 is respectively arranged in the first connecting head 5 and the second connecting head 6, and the two are bonded to form a complete connecting rod hole 13. The connecting slot 4 connected to the end of the second elastic member 300 is also respectively arranged on the side walls of the first connecting head 5 and the second connecting head 6, and the two are bonded to form a complete connecting slot 4.

[0064] The above embodiments do not impose any formal restrictions on the shape, material, structure, etc. of the utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model belong to the protection scope of the technical solution of the utility model.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", 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 protection content of the present invention.

[0066] If the words "first", "second" and so on are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the utility model and simplifying the description. Unless otherwise stated, the above words have no special meaning.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A split ball head fixing structure, comprising a connecting head, characterized in that: The connector is a split structure, and includes a first connector and a second connector, wherein an arc section for accommodating a ball head is formed between the first connector and the second connector.

2. A split ball head fixing structure according to claim 1, characterized in that: A groove for conveniently clamping the ball head is also formed between the first connector and the second connector.

3. The split ball head fixing structure according to claim 1, characterized in that: Also included is a clamping rod connecting the first connector and the second connector.

4. The split ball head fixing structure according to claim 1, characterized in that: The first connector side wall is provided with a first positioning plate, the second connector side wall is provided with a second positioning plate, the first positioning plate and the second positioning plate are both provided with pin holes, and a pin is passed through the pin holes.

5. The split ball head fixing structure according to claim 1, characterized in that: The second connecting head is provided with a positioning groove, and the first connecting head is provided with a protrusion which can rotate along the positioning groove.

6. The split ball head fixing structure according to claim 4, characterized in that: The first positioning plate is provided at two locations, and a cavity for accommodating the second positioning plate is formed between the two first positioning plates.

7. The split ball head fixing structure according to claim 1, characterized in that: The first connector and the second connector are connected by bonding, and a groove for facilitating glue application is provided at the connection between the first connector and the second connector.

8. The split ball head fixing structure according to claim 7, characterized in that: A fixing rod for auxiliary connection is also arranged between the first connecting head and the second connecting head.

9. The split ball head fixing structure according to claim 1, characterized in that: A fixing groove is formed between the first connector and the second connector. A first elastic member is disposed in the fixing groove. Two ends of the first elastic member are respectively connected to the first connector and the second connector.

10. A parallel arm, characterized in that: It comprises a first link arm and a second link arm arranged in parallel, wherein the first link arm and the second link arm are connected via a second elastic member; The first link arm and the second link arm both include a connecting rod, and the end of the connecting rod is provided with a split ball head fixing structure as described in any one of claims 1 to 9; The connecting head is provided with a connecting rod hole for accommodating the connecting rod, the connecting head side wall is provided with a connecting slot for fixing the second elastic member, and the connecting slot is provided with a fixing hole connected to the end of the second elastic member.

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