Integrated ball head fixing structure and parallel arm

Abstract

The utility model discloses an integrated ball head fixing structure and a parallel arm, the ball head fixing structure comprises a connector, a groove is arranged in the connector, and an arc-shaped section for accommodating a ball head is arranged in the groove; a clamping rod used for pressing the ball head is arranged in the connector and penetrates through the groove, a supporting column is arranged in the groove, and the two ends of the supporting column abut against the inner walls of the two sides of the groove. 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 an elastic piece; the utility model has the beneficial effects that through the arrangement of the groove, the ball head can be easily pressed into the connector, and the fixation of the ball head and the assembly of the parallel arm are realized; the first connecting arm and the second connecting arm are connected through the elastic piece to form a parallelogram, and stress is even.

Description

Technical Field

[0001] The utility model relates to the field of 3D printing equipment, and in particular to an integrated 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. Summary of the invention

[0004] The utility model aims to provide an integrated ball head fixing structure and a parallel arm, which can ensure that the ball head is always in close contact with the connecting head during the printing process, thereby improving the printing accuracy.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An integrated ball head fixing structure comprises a connecting head, wherein a groove is arranged in the connecting head, and an arc section for accommodating the ball head is arranged in the groove.

[0007] Preferably, a clamping rod for clamping the ball head is provided in the connecting head, and the clamping rod passes through the groove.

[0008] Preferably, a support column is provided in the groove, and two ends of the support column abut against inner walls on both sides of the groove.

[0009] Preferably, a positioning groove for accommodating a support column is provided in the groove.

[0010] Preferably, the groove passes through the upper end surface of the connector, and a clamping device is provided on the outer side of the connector.

[0011] Preferably, the clamping device is a clamping rod passing through the connecting head.

[0012] Preferably, the clamping device is a nut screwed onto the outside of the connecting head.

[0013] Preferably, a top column for pressing the ball head is arranged in the groove.

[0014] Preferably, the top column is screwed to the inner wall of the groove via threads, a top rod is provided inside the top column, and the bottom of the top rod has an arc matching the shape of the ball head.

[0015] 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 by an elastic member;

[0016] 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;

[0017] 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 elastic member, and the connecting slot is provided with a fixing hole connected to the end of the elastic member.

[0018] The beneficial effects of the utility model are:

[0019] 1. Through the setting of the groove, the ball head can be easily pressed into the connector to achieve the fixation of the ball head and the assembly of the parallel arm.

[0020] 2. The groove is clamped by the clamping rod. 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 to allow the arc segment to clamp the ball head again.

[0021] 3. The support column can support the groove, and when tightening the clamping rod, it can ensure that the clamping degree of the connecting head on the ball head is certain.

[0022] 4. The first link arm and the second link arm are connected by an elastic member to form a parallelogram with uniform force. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of the first embodiment;

[0024] Figure 2 A three-dimensional diagram of another angle of the first embodiment;

[0025] Figure 3 is a cross-sectional view of embodiment 1;

[0026] Figure 4 It is a stereogram of the second embodiment;

[0027] Figure 5 It is a front view of the second embodiment;

[0028] Figure 6 It is a three-dimensional diagram of embodiment 3;

[0029] Figure 7 It is a three-dimensional diagram of the fourth embodiment;

[0030] Figure 8 It is a three-dimensional diagram of Embodiment 5;

[0031] Fig. 9 is a cross-sectional view of Embodiment 5;

[0032] Fig.10 A three-dimensional diagram of the parallel arm.

[0033] The reference numerals are as follows:

[0034] 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 131, positioning slot 132, supporting column 5, nut 51, opening 6, top column 61, top rod 100, first connecting arm 200, second connecting arm 300, elastic member 101, connecting rod.

[0035] 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

[0036] The utility model is further described below in conjunction with the accompanying drawings.

[0037] Embodiment 1

[0038] like Figure 1 — Figure 3 As shown, an integrated ball head fixing structure of this embodiment includes a connecting head 1, a groove 11 is opened in the connecting head 1, and an arc segment 12 that fits tightly with the ball head 2 is provided at one end of the groove 11. When the connecting head 1 is injection molded, the ball head 2 is installed in the arc segment 12 by pressing.

[0039] In order to ensure the clamping force of the arc segment 12 on the ball head 2, a clamping rod 3 can be inserted into the connector 1. The connector 1 and the clamping rod 3 are connected by threads. When the clamping rod 3 is tightened, the width of the groove 11 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 arc segment 12, the clamping rod 3 can be tightened to make the two fit tightly again.

[0040] like Fig.10As 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 are connected by an elastic member 300, and the elastic member 300 can be a spring or a tension spring, which is used to connect the first link arm 100 and the second link arm 200, so that they form a parallelogram structure during the printing process, which has a certain stability.

[0041] The first link arm 100 and the second link arm 200 have the same structure, both comprising a connecting rod 101, and the end of the connecting rod 101 is provided with the aforementioned 3D printer ball head fixing structure;

[0042] A connecting rod hole 13 is provided in the connecting head 1, and the connecting rod 101 extends into the connecting rod hole 13 to be 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 provided in the connecting slot 4. The fixing hole 41 is used to connect the end of the elastic member 300, so that the elastic member 300 can be installed and fixed between the two symmetrically arranged ball head fixing structures on the first link arm 100 and the second link arm 200.

[0043] Embodiment 2

[0044] like Figure 4 and Figure 5 As shown, an integrated ball head fixing structure of this embodiment includes a connecting head 1, a groove 11 is opened in the connecting head 1, an arc section 12 tightly fitting with the ball head 2 is provided at one end of the groove 11, and a clamping rod 3 is also passed through the connecting head 1.

[0045] In order to ensure that the arc segment 12 has a certain degree of clamping on the ball head 2 when the clamping rod 3 is tightened, the support column 132 ( Figure 4 The support column 132 is not shown). When the clamping rod 3 is tightened, the two ends of the support column 132 abut against the inner walls of the two sides of the groove 12 to support the groove 12.

[0046] A through hole is provided in the support column 132 for the clamping rod 3 to pass through. In order to facilitate the support column 132 to be installed into the specified position of the groove 12 so that the clamping rod 3 can pass through, a positioning groove 131 is also opened in the groove 12. When the support column 132 is installed into the positioning groove 131, this position allows the clamping rod 3 to smoothly pass through the through hole in the support column 132, which is convenient for assembly.

[0047] like Fig.10 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.

[0048] A connecting rod hole 13 for accommodating the end of the connecting rod 101 is disposed in the connecting head 1 , and a connecting slot 4 connected to the end of the elastic member 300 is disposed on the side wall of the connecting head 1 .

[0049] Embodiment 3

[0050] like Figure 6 As shown, an integrated ball head fixing structure of this embodiment includes a connecting head 1, a groove 11 is formed in the connecting head 1, and an arc segment 12 that fits tightly with the ball head 2 is formed in the groove 11.

[0051] The groove 11 passes through the upper end surface of the connector 1, and the connector 1 can be easily opened so that the ball head 2 can be installed into the arc segment 12 in the groove 11 without the need to crimp the ball head 2, thereby optimizing the assembly process. A clamping rod 3 that passes through the connector is provided on the outside of the connector 1. By tightening the clamping rod 3, the arc segment 12 can clamp the ball head 2.

[0052] To ensure that the arc segment 12 clamps the ball head 2 to a certain degree, the present embodiment may also install a support column 132 in the groove 12 and set a positioning groove 131 in the groove. For details, refer to the support column 132 and the positioning groove 131 in the second embodiment, which will not be described in detail in this embodiment.

[0053] like Fig.10 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.

[0054] A connecting rod hole 13 for accommodating the end of the connecting rod 101 is disposed in the connecting head 1 , and a connecting slot 4 connected to the end of the elastic member 300 is disposed on the side wall of the connecting head 1 .

[0055] Embodiment 4

[0056] like Figure 7 As shown, an integrated ball head fixing structure of this embodiment includes a connecting head 1, a groove 11 is formed in the connecting head 1, and an arc segment 12 that fits tightly with the ball head 2 is formed in the groove 11.

[0057] The groove 11 runs through the upper end surface of the connector 1, and the connector 1 can be easily opened so that the ball head 2 can be installed into the arc segment 12 in the groove 11. The side wall of the connector 1 is also provided with a groove 51, which is more convenient for installing the ball head 2. A nut 5 is screwed on the outer side of the connector 1. The nut 5 is rotated to clamp the groove 11 and the arc segment 12 to fix the ball head 2.

[0058] like Fig.10As 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.

[0059] A connecting rod hole 13 for accommodating the end of the connecting rod 101 is disposed in the connecting head 1 , and a connecting slot 4 connected to the end of the elastic member 300 is disposed on the side wall of the connecting head 1 .

[0060] Embodiment 5

[0061] like Figure 8 and Fig. 9 As shown, an integrated ball head fixing structure of this embodiment includes a connecting head 1, a groove 11 is formed in the connecting head 1, and an arc segment 12 that fits tightly with the ball head 2 is formed in the groove 11.

[0062] The groove 11 runs through the upper end surface of the connector 1, and the connector 1 can be easily opened so that the ball head 2 can be installed into the arc segment 12 in the groove 11. A nut 5 is screwed on the outside of the connector 1. The groove 11 and the arc segment 12 are clamped by rotating the nut 5 to fix the ball head 2.

[0063] In order to prevent the ball head 2 from sliding upward, a top column 6 for pressing the ball head 2 is provided in the groove 11 in this embodiment.

[0064] The top column 6 is screwed to the inner wall of the groove 11 by threads. A top rod 61 is arranged inside the top column 6. The bottom of the top rod 61 has an arc that matches the shape of the ball head 2. While pressing the ball head 2, it will not hinder the rotation of the ball head 2.

[0065] like Fig.10 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.

[0066] A connecting rod hole 13 for accommodating the end of the connecting rod 101 is disposed in the connecting head 1 , and a connecting slot 4 connected to the end of the elastic member 300 is disposed on the side wall of the connecting head 1 .

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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. An integrated ball head fixing structure, comprising a connecting head, characterized in that: The connector is provided with a groove, and the groove is provided with an arc section for accommodating the ball head; A clamping rod for clamping the ball head is provided in the connector, and the clamping rod passes through the groove; or the groove passes through the upper end surface of the connector, and a clamping device is provided on the outside of the connector; The clamping device is a clamping rod that passes through the connecting head; or the clamping device is a nut that is screwed on the outside of the connecting head.

2. The integrated ball head fixing structure according to claim 1, characterized in that: A support column is arranged in the groove, and two ends of the support column abut against inner walls at both sides of the groove.

3. The integrated ball head fixing structure according to claim 2, characterized in that: A positioning groove for accommodating a support column is arranged in the groove.

4. The integrated ball head fixing structure according to claim 1, characterized in that: A top column for pressing the ball head is arranged in the groove.

5. The integrated ball head fixing structure according to claim 4, characterized in that: The top column is screwed to the inner wall of the groove through threads, a top rod is arranged inside the top column, and the bottom of the top rod has an arc matching the shape of the ball head.

6. 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 by an 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 an integrated ball head fixing structure according to any one of claims 1 to 5; 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 elastic member, and the connecting slot is provided with a fixing hole connected to the end of the elastic member.

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