Universal ball head for telescopic oil receiving device and telescopic oil receiving device

Abstract

The universal ball head comprises an inner ball head, an inner cylinder and a locking piece, a mounting hole is formed in the center of the inner ball head in a penetrating mode, a first groove is formed in the position, located on the inner wall of the inner ball head, in the mounting hole in the axial direction of the mounting hole, and a second groove is formed in the inner wall of the inner cylinder. The inner cylinder is in threaded connection with the interior of the mounting hole of the inner ball head, a second groove matched with the first groove is formed in the inner cylinder, the locking piece is inserted into the first groove and the second groove which are arranged in a matched mode, and the first groove in the inner wall of the inner ball head and the second groove in the outer wall of the inner cylinder are matched to form an inserting groove. According to the universal ball head, the locking piece is inserted into the inserting groove to limit the rotation and loosening of the threads of the inner cylinder and the inner ball head, the structural form is simple and reliable, and the structure of the inner cylinder and the inner ball head is slightly changed, so that the universal ball head can be conveniently machined and assembled, the universal ball head can be prevented from loosening in the using process, and the stability and reliability of the performance of the universal ball head are guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of telescopic oil receiving, and in particular relates to a universal ball head used for a telescopic oil receiving device and the telescopic oil receiving device. Background Art

[0002] The telescopic refueling device has the advantages of small space occupation and compact structure. It is gradually replacing the fixed aerial refueling device and becoming an important trend in the development of China's soft aerial refueling. The fuel pipeline of the telescopic refueling device is equipped with a universal ball joint. As an important component of the telescopic refueling device, the universal ball joint has important requirements for its performance. However, due to its large size, it brings great challenges to the processing, assembly and performance stability of the universal ball joint during use. Utility Model Content

[0003] The utility model aims to provide a universal ball head for a telescopic oil receiving device and the telescopic oil receiving device, so as to solve the problems existing in the processing, assembly and performance stability of the universal ball head of the telescopic oil receiving device during use.

[0004] The utility model is realized by the following technical solutions:

[0005] In some embodiments, a universal ball joint for a telescopic oil receiving device includes:

[0006] An inner ball head, a mounting hole is formed through the center of the inner ball head, and a first groove is formed on the inner wall of the inner ball head along the axial direction of the mounting hole;

[0007] An inner cylinder, one end of which is connected to the mounting hole of the inner ball head through a thread, and a second groove is provided on the inner cylinder to cooperate with the first groove;

[0008] A locking piece is inserted into the first groove and the second groove which are matched with each other.

[0009] In some embodiments, one end of the locking piece extends out of the first groove and the second groove, and a limiting mechanism for limiting the movement of the locking piece along the axial direction of the inner cylinder is provided between the extended end of the locking piece and the inner cylinder.

[0010] In some embodiments, the limiting mechanism includes an elbow provided at one end of the locking plate extending outward, and a limiting hole provided on the inner cylinder and cooperating with the elbow.

[0011] In some embodiments, the locking piece is an elastic member.

[0012] In some embodiments, a sliding groove into which the elbow can be inserted is provided on the inner cylinder outside the limiting hole.

[0013] In some embodiments, a boss is provided on the locking plate, the boss is arranged toward the inner cylinder and matches the step structure provided on the inner cylinder, so that the boss abuts against the outer surface of the inner cylinder at a corresponding position.

[0014] In some embodiments, an elastic section is disposed between the boss and the elbow.

[0015] In some embodiments, one end of the locking piece inserted into the first groove and the second groove is configured to be in an arc shape.

[0016] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0017] 1) A plug-in groove is formed by cooperating a first groove arranged on the inner wall of the inner ball head and a second groove arranged on the outer wall of the inner cylinder, and a locking piece is inserted into the plug-in groove to limit the rotation and loosening of the inner cylinder and the inner ball head threads. This structural form is simple and reliable, and the structural changes to the inner cylinder and the inner ball head are relatively small, so that the processing and assembly of the universal ball head can be facilitated, and the universal ball head can be prevented from loosening during use, thereby ensuring the stability and reliability of the performance of the universal ball head.

[0018] 2) The locking plate is limited by the cooperation between the elbow on the locking plate and the upper limit hole on the inner cylinder to prevent the locking plate from loosening during use, which can further ensure the stability of the anti-loosening performance of the universal ball head and facilitate the disassembly, assembly and replacement of the locking plate.

[0019] 3) A boss facing the outer wall of the inner cylinder is provided on the locking plate at the joint of the outer wall of the inner cylinder to fill the gap between the locking plate and the outer wall of the inner cylinder to prevent the locking plate from being squeezed and deformed when the outer ball head rotates, thereby affecting the performance of the locking plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Figure 2 It is a structural schematic diagram of the locking piece of the utility model.

[0023] Among them: 1. Inner tube; 2. Inner ball head; 3. Locking plate; 4. Limiting hole; 5. Mounting hole; 6. First groove; 7. Second groove; 8. Plug-in groove; 9. Slide groove; 10. Large diameter section; 11. Small diameter section; 31. Straight head end; 32. Elbow; 33. Elastic section; 34. Boss. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0025] Example 1

[0026] like Figure 1 As shown, a universal ball head for a telescopic oil receiving device and a telescopic oil receiving device, comprising:

[0027] An inner ball head 2, wherein a mounting hole 5 is penetrated at the center of the inner ball head 2, a first groove 6 is provided on the inner wall of the inner ball head 2 along the axial direction of the mounting hole 5, the inner ball head 2 is drum-shaped, and a thread is provided in the mounting hole 5;

[0028] An inner cylinder 1, one end of which is threadedly connected to a mounting hole 5 of an inner ball head 2, and a second groove 7 cooperating with the first groove 6 is formed on the inner cylinder 1;

[0029] The locking piece 3 is inserted into the first groove 6 and the second groove 7 which are matched with each other.

[0030] The inner ball head 2 is connected to the inner cylinder 1 through threads, and the fuel is transported through the internal cavity structure. The universal ball head has three degrees of freedom in rotation to adapt to the telescopic and retractable movements of the fuel receiving device during refueling. In order to prevent the inner ball head 2 from loosening and separating from the inner cylinder 1 during the movement, the thread needs to be designed to prevent loosening. However, the thread size connecting the inner ball head 2 and the inner cylinder 1 is large, and conventional thread loosening prevention measures will pay a large price in weight and size.

[0031] When the inner cylinder 1 is screwed into the inner ball head 2, the first groove 6 on the inner wall of the inner ball head 2 and the second groove 7 on the outer wall of the inner cylinder 1 cooperate to form an insertion groove 8, and the locking piece 3 is inserted into the insertion groove 8 to limit the loosening of the threads of the inner cylinder 1 and the inner ball head 2. This structural form is simple and reliable, and the structural changes to the inner cylinder 1 and the inner ball head 2 are relatively small, so that the processing and assembly of the universal ball head can be facilitated, and the universal ball head can be prevented from loosening during use, thereby ensuring the stability and reliability of the performance of the universal ball head.

[0032] In order to facilitate the removal of the locking piece 3, a clearance fit is set between the locking piece 3 and the plug-in groove 8. At this time, in order to prevent the locking piece 3 from falling out of the plug-in groove 8, one end of the locking piece 3 is extended out of the first groove 6 and the second groove 7, and a limiting mechanism for limiting the movement of the locking piece 3 along the axial direction of the inner tube 1 is provided between the extended end of the locking piece 3 and the inner tube 1. The movement of the locking piece 3 is limited by the limiting mechanism, thereby preventing the locking piece 3 from falling out of the plug-in groove 8.

[0033] In some embodiments, the limiting mechanism includes an elbow 32 provided at one end of the locking piece 3 and a limiting hole 4 provided on the inner tube 1 and cooperating with the elbow 32. Figure 1 As shown, the elbow 32 on the locking piece 3 can be inserted into the limiting hole 4, which stabilizes the locking piece 3 and prevents the locking piece 3 from loosening, and further limits the inner tube 1 and the inner ball head 2 from rotating loose. When disassembling, it is only necessary to move the elbow 32 of the locking piece 3 to make the elbow 32 withdraw from the limiting hole 4 and pull the locking piece 3 out of the plug-in slot 8 to release the anti-loosening design. The anti-loosening design has a simple structure and is easy to install and disassemble.

[0034] Furthermore, if Figure 1 As shown, the locking piece 3 is an elastic member, and a slide groove 9 for the elbow 32 to extend into is provided on the inner cylinder 1 at the outer side of the limiting hole 4. When the locking piece 3 is pulled out, the elbow 32 is placed in the slide groove 9. At this time, the locking piece 3 and the inner cylinder 1 remain parallel to each other, avoiding the increase of friction between the locking piece 3 and the outer ball head (not shown in the figure) so that the locking piece 3 is difficult to be pulled out.

[0035] In some embodiments, the limiting mechanism can also adopt a bolt and nut assembly, and the locking plate 3 can be fixed on the inner tube 1 by tightening the bolt and nut assembly. When disassembly and assembly are required, the locking plate 3 can be pulled out by loosening the bolt and nut assembly.

[0036] In some embodiments, Figure 2 As shown, one end of the locking piece 3 inserted into the insertion slot 8 is a straight end 31 . In a preferred embodiment, the end of the straight end 31 is arc-shaped, which is convenient for inserting the straight end 31 into the insertion slot 8 .

[0037] Example 2

[0038] like Figure 1 As shown, the inner cylinder 1 includes a large diameter section 10 and a small diameter section 11. The large diameter section 10 is threadedly connected to the inner ball head 2. The diameter of the large diameter section 10 is larger than the diameter of the small diameter section 11. A boss 34 is provided on the locking plate 3. The boss 34 is arranged toward the inner cylinder 1 and is located in the gap between the small diameter section 11 of the inner cylinder 1 and the locking plate 3, so that the boss 34 abuts against the outer surface of the inner cylinder 1 at the corresponding position. An elastic section 33 is provided between the boss 34 and the elbow 32.

[0039] When the straight end 31 of the locking plate 3 is installed in the insertion groove 8, the elbow 32 is also inserted into the limiting hole 4. At this time, the boss 34 fills the gap between the locking plate 3 and the small diameter section 11 of the inner tube 1, so as to avoid that during the disassembly and debugging process, when the outer ball head rotates (not shown in the figure), the locking plate 3 may be squeezed and deformed, so that the elbow 32 of the locking plate 3 may fall out of the limiting hole 4, causing the locking plate 3 to fall out of the insertion groove 8 and the anti-loosening failure.

[0040] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. used to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when used. They are only for the convenience of describing the present utility model 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 present utility model.

[0041] In addition, if the terms "horizontal" or "vertical" appear in the description of the present invention, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0042] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A universal ball joint for a telescopic oil receiving device, characterized in that: include: An inner ball head, wherein a mounting hole (5) is penetrated at the center of the inner ball head (2), and a first groove (6) is provided on the inner wall of the inner ball head (2) in the mounting hole (5) along the axial direction of the mounting hole (5); An inner cylinder, one end of the inner cylinder (1) being connected to a mounting hole (5) of the inner ball head (2) via a thread, and the inner cylinder (1) being provided with a second groove (7) cooperating with the first groove (6); A locking plate, wherein the locking plate (3) is inserted into a first groove (6) and a second groove (7) which are arranged in a matching manner.

2. A universal ball joint for a telescopic oil receiving device according to claim 1, characterized in that: One end of the locking piece (3) extends out of the first groove (6) and the second groove (7), and a limiting mechanism for limiting the movement of the locking piece (3) along the axial direction of the inner cylinder (1) is provided between the protruding end of the locking piece (3) and the inner cylinder (1).

3. The universal ball joint for a telescopic oil receiving device according to claim 2, characterized in that: The limiting mechanism comprises an elbow (32) provided at one end extending from the locking plate (3) and a limiting hole (4) provided on the inner cylinder (1) and cooperating with the elbow (32).

4. The universal ball joint for a telescopic oil receiving device according to claim 3, characterized in that: The locking piece (3) is an elastic piece.

5. The universal ball joint for a telescopic oil receiving device according to claim 4, characterized in that: The inner cylinder (1) is provided with a sliding groove (9) outside the limiting hole (4) into which the elbow (32) can extend.

6. The universal ball joint for a telescopic oil receiving device according to claim 4, characterized in that: The locking plate (3) is provided with a boss (34), which is arranged in the direction of the inner cylinder (1) and matches the step structure provided on the inner cylinder (1), so that the boss (34) abuts against the outer surface of the inner cylinder (1) at a corresponding position.

7. A universal ball joint for a telescopic oil receiving device according to claim 6, characterized in that: An elastic section (33) is provided between the boss (34) and the elbow (32).

8. The universal ball joint for a telescopic oil receiving device according to claim 1, characterized in that: One end of the locking piece (3) inserted into the first groove (6) and the second groove (7) is arranged in an arc shape.

9. A telescopic oil receiving device, characterized in that: The invention comprises the universal ball head as claimed in any one of claims 1 to 8.

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