Universal joint structure

Abstract

The utility model relates to the technical field of universal joints, in particular to a universal joint structure. Comprising a telescopic rod and two movable connecting mechanisms, the two movable connecting mechanisms are connected to the two ends of the telescopic rod respectively, each movable connecting mechanism comprises a cross-shaped rotating shaft, two U-shaped connecting frames, two hollow connecting shafts and four sets of fixed connecting assemblies, round holes are formed in the two ends of each U-shaped connecting frame, and circular rings are arranged on the inner sides of the round holes; an annular cavity is formed in the inner side of the circular ring, and a plurality of fine holes communicated with the annular cavity are formed in the circular ring; the hollow connecting shaft is of a hollow structure, and a piston plate is slidably arranged on the inner side of the hollow connecting shaft. The lubricating structure for the movable connecting mechanism is simple and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of universal joints, and particularly relates to a universal joint structure. Background Art

[0002] A universal joint, namely a universal joint head, is a mechanical part for realizing power transmission at a variable angle and is used in positions where the direction of the transmission axis needs to be changed. It is the "joint" part of the universal transmission device of the drive system. The combination of a universal joint and a transmission shaft is called a universal joint transmission device.

[0003] Chinese Patent with the publication number CN219605877U discloses a universal joint structure, including a universal joint assembly, characterized in that: the universal joint assembly includes a shaft rod and a connecting piece arranged at one end of the shaft rod, and a cross shaft is arranged inside the connecting piece; the connecting piece includes a sleeve fork connected to one end of the shaft rod and a round hole opened on the surface of the sleeve fork, a movable shaft ring is arranged inside the round hole, and a lubricating oil passage is further opened inside the sleeve fork for lubricating oil to pass through.

[0004] The above-mentioned disclosed patent still has the following technical defects: the operation of dripping lubricating oil is cumbersome, the oil dripping nozzle needs to be aligned with the oil inlet hole, and the number of oil inlet holes is limited, making it difficult to achieve an all-round lubrication effect. Content of the Utility Model

[0005] The purpose of the utility model is to propose a universal joint structure aiming at the problems existing in the background art.

[0006] The technical solution of the utility model, a universal joint structure, includes:

[0007] A telescopic rod and two movable connection mechanisms, the two movable connection mechanisms are respectively connected to both ends of the telescopic rod, the movable connection mechanism includes a cross shaft, two U-shaped connection frames, two hollow connection shafts and four groups of fixed connection components. The two U-shaped connection frames are respectively connected to the two hollow connection shafts. Round holes are opened at both ends of the U-shaped connection frame, a ring is arranged inside the round hole, an annular cavity is arranged inside the ring, a plurality of fine holes communicating with the annular cavity are opened on the ring, and a plurality of first balls are installed on the inner wall of the ring. The four groups of fixed connection components are respectively installed at both ends of the two U-shaped connection frames. The fixed connection component includes a connecting column, a knob and a screw column. The connecting column passes through the corresponding round hole, and the knob and the screw column are respectively connected to both ends of the connecting column. Thread grooves adapted to the screw columns are opened at the four ends of the cross shaft. The movable connection mechanism is connected to the end of the telescopic rod through one side hollow connection shaft; the hollow connection shaft has a hollow structure, a piston plate is slidably arranged inside the hollow connection shaft, an L-shaped push rod is connected to the piston plate, a sliding hole for the end of the L-shaped push rod to slide is opened on the hollow connection shaft, an extrusion pipe is communicated with the inner cavity of the hollow connection shaft, and a hose is connected between the extrusion pipe and the annular cavity of the two corresponding rings.

[0008] Preferably, a plurality of second balls are mounted on one side of the knob adjacent to the U-shaped connecting frame in a circular array.

[0009] Preferably, a plurality of fine holes are provided on the inner side wall of the circular ring and on one side wall of the circular ring adjacent to the second balls.

[0010] Preferably, a filling port communicating with the inner cavity is provided on the hollow connecting shaft.

[0011] Preferably, a sealing ring is provided on the outer periphery of the piston plate.

[0012] Preferably, the telescopic rod includes a sleeve and a movable rod, and the end of the movable rod is slidably mounted inside the sleeve.

[0013] Preferably, a hose is connected between the extrusion tube adjacent to the telescopic rod and the inner cavity of the sleeve.

[0014] Compared with the prior art, the utility model has the following beneficial technical effects: By pushing the piston plate to move, the lubricating oil enters the hose through the extrusion tube, and the lubricating oil is ejected through a plurality of fine holes, so as to lubricate the outer walls of the first balls and the connecting columns, reduce the friction generated by the movable connection mechanism during movement, ensure the flexibility of its operation, and its lubricating structure is concise and the operation is convenient. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the utility model.

[0016] Figure 2 is a schematic structural diagram of the movable connection mechanism in the utility model.

[0017] Figure 3 is a cross-sectional structural diagram of the hollow connecting shaft in the utility model.

[0018] Reference numerals: 1, telescopic rod; 2, U-shaped connecting frame; 201, round hole; 3, hollow connecting shaft; 301, sliding hole; 4, cross-shaped rotating shaft; 401, threaded groove; 5, circular ring; 501, fine hole; 61, first ball; 62, second ball; 7, connecting column; 8, knob; 9, screw post; 10, extrusion tube; 11, one-way valve; 12, L-shaped push rod; 13, piston plate; 14, filling port. Detailed Embodiments

[0019] Embodiment 1

[0020] As Figures 1 - 3As shown in the figure, a universal joint structure proposed in this embodiment includes a telescopic rod 1 and two movable connection mechanisms. The two movable connection mechanisms are respectively connected to both ends of the telescopic rod 1. The movable connection mechanism includes a cross shaft 4, two U-shaped connection brackets 2, two hollow connection shafts 3, and four groups of fixed connection components. The two U-shaped connection brackets 2 are respectively connected to the two hollow connection shafts 3. Circular holes 201 are opened at both ends of the U-shaped connection bracket 2. A circular ring 5 is arranged inside the circular hole 201. An annular cavity is arranged inside the circular ring 5. A plurality of fine holes 501 communicating with the annular cavity are opened on the circular ring 5. A plurality of first balls 61 are installed on the inner wall of the circular ring 5. The four groups of fixed connection components are respectively installed at both ends of the two U-shaped connection brackets 2. The fixed connection component includes a connection column 7, a knob 8, and a screw column 9. The connection column 7 passes through the circular hole 201 on the corresponding side. The knob 8 and the screw column 9 are respectively connected to both ends of the connection column 7. Thread grooves 401 adapted to the screw column 9 are opened at the four ends of the cross shaft 4. The movable connection mechanism is connected to the end of the telescopic rod 1 through a hollow connection shaft 3 on one side. The telescopic rod 1 includes a sleeve and a movable rod. The end of the movable rod is slidably installed inside the sleeve.

[0021] The hollow connection shaft 3 has a hollow structure. A piston plate 13 is slidably arranged inside the hollow connection shaft 3. A sealing ring is arranged on the outer periphery of the piston plate 13. An L-shaped push rod 12 is connected to the piston plate 13. A sliding hole 301 for the end of the L-shaped push rod 12 to slide is opened on the hollow connection shaft 3. An extrusion pipe 10 communicates with the inner cavity of the hollow connection shaft 3. Hoses are connected between the extrusion pipe 10 and the annular cavities of the two circular rings 5 on the corresponding side. A hose is connected between the extrusion pipe 10 adjacent to the telescopic rod 1 and the inner cavity of the sleeve. During the process of pushing out the hydraulic oil, the hydraulic oil enters the inside of the sleeve through the hose again, so as to lubricate the inner wall of the sleeve and reduce the friction between the sleeve and the movable rod.

[0022] A filling port 14 communicating with its inner cavity is arranged on the hollow connection shaft 3. Lubricating oil can be added into the inner cavity of the hollow connection shaft 3 through the filling port 14. A lid is detachably installed on the filling port 14 for sealing the filling port 14.

[0023] In this embodiment, the knob 8 is provided to drive the screw post 9 to rotate, so that the screw post 9 is screwed out from the thread groove 401 on the corresponding side, and the above-mentioned method is used to disassemble the remaining multiple fixed connection components, thereby realizing the disassembly of the movable connection mechanism, which is convenient for replacing the cross shaft 4; by pushing the L-shaped push rod 12 to move, the piston plate 13 can be driven to move. The piston plate 13 squeezes the lubricating oil arranged in the inner cavity of the hollow connecting shaft 3, and the lubricating oil enters the hose through the extrusion pipe 10. A one-way valve 11 is installed on the extrusion pipe 10 to only allow the oil to flow out through the extrusion pipe 10. Subsequently, the lubricating oil flows into the annular cavity of the ring 5 and is sprayed out through a plurality of fine holes 501, so as to lubricate the outer walls of the first ball 61 and the connecting column 7, reduce the friction generated by the movable connection mechanism during movement, and ensure its operating flexibility. Its lubrication structure is simple and the operation is convenient.

[0024] Embodiment II

[0025] As Figure 2 and Figure 3 shown, a universal joint structure proposed in this embodiment, compared with Embodiment I, in this embodiment, a plurality of second balls 62 are installed along the annular array on the side surface of the knob 8 adjacent to the U-shaped connecting frame 2. The setting of the second balls 62 can prevent the knob 8 from directly contacting the outer wall of the U-shaped connecting frame 2, and further reduce the friction of the movable connection mechanism during movement; a plurality of fine holes 501 are opened on the inner side wall of the ring 5 and on the side wall of the ring 5 adjacent to the second balls 62. The opened fine holes 501 can play a role in lubricating the second balls 62.

[0026] The above has described in detail the embodiments of the present invention in conjunction with the drawings. However, the present invention is not limited to this. Various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those skilled in the art to which the present invention pertains.

Claims

1. A universal joint structure, characterized in that, Comprising: A telescopic rod (1) and two movable connection mechanisms, the two movable connection mechanisms are respectively connected to both ends of the telescopic rod (1), the movable connection mechanism includes a cross-shaped rotating shaft (4), two U-shaped connecting frames (2), two hollow connecting shafts (3) and four groups of fixed connection components. The two U-shaped connecting frames (2) are respectively connected to the two hollow connecting shafts (3). Circular holes (201) are provided at both ends of the U-shaped connecting frame (2). A circular ring (5) is arranged inside the circular hole (201). An annular cavity is arranged inside the circular ring (5). A plurality of fine holes (501) communicating with the annular cavity are provided on the circular ring (5). A plurality of first ball bearings (61) are installed on the inner wall of the circular ring (5). The four groups of fixed connection components are respectively installed at both ends of the two U-shaped connecting frames (2). The fixed connection component includes a connecting column (7), a knob (8) and a screw column (9). The connecting column (7) passes through the circular hole (201) on the corresponding side. The knob (8) and the screw column (9) are respectively connected to both ends of the connecting column (7). Threaded grooves (401) adapted to the screw column (9) are provided at the four ends of the cross-shaped rotating shaft (4). The movable connection mechanism is connected to the end of the telescopic rod (1) through a hollow connecting shaft (3) on one side; the hollow connecting shaft (3) has a hollow structure. A piston plate (13) is slidably arranged inside the hollow connecting shaft (3). An L-shaped push rod (12) is connected to the piston plate (13). A sliding hole (301) for the end of the L-shaped push rod (12) to slide is provided on the hollow connecting shaft (3). An extrusion pipe (10) is communicated with the inner cavity of the hollow connecting shaft (3). Hoses are connected between the extrusion pipe (10) and the annular cavities of the two circular rings (5) on the corresponding side.

2. The universal joint structure according to claim 1, characterized in that, A plurality of second ball bearings (62) are installed in a circular array along the side surface of the knob (8) adjacent to the U-shaped connecting frame (2).

3. The universal joint structure according to claim 2, characterized in that, A plurality of fine holes (501) are provided on the inner side wall of the circular ring (5) and on the side wall of the circular ring (5) adjacent to the second ball bearings (62).

4. A universal joint structure according to claim 1, characterized in that, A filling port (14) communicating with its inner cavity is provided on the hollow connecting shaft (3).

5. A universal joint structure according to claim 1, characterized in that, A sealing ring is arranged on the outer periphery of the piston plate (13).

6. The universal joint structure according to claim 1, characterized in that, The telescopic rod (1) includes a sleeve and a movable rod. The end of the movable rod is slidably installed inside the sleeve.

7. A universal joint structure according to claim 6, characterized in that, A hose is connected between the extrusion pipe (10) adjacent to the telescopic rod (1) and the inner cavity of the sleeve.

Images