Adjustable grease fitting

Abstract

The utility model belongs to the technical field of grease fittings, and particularly relates to an adjustable grease fitting which comprises a connecting pipe and an input pipe, the connecting pipe is movably arranged at one end of the input pipe in a sleeved mode, pipelines of the connecting pipe and the input pipe are communicated, and an adjusting fastening cap capable of rotating in the circumferential direction is arranged on the input pipe. The adjusting fastening cap is connected with the connecting pipe, a one-way valve is arranged at the other end of the input pipe, and a butt joint locking assembly is arranged on the outer wall of the one-way valve in the circumferential direction. The connecting pipe and the input pipe are rotationally connected in an inserted and sleeved mode and are sealed and fixed by adjusting the fastening cap, and no matter how the connecting pipe is connected with equipment, the input pipe can change the angle according to the actual use condition during installation, so that the input pipe can avoid blocking of the equipment, and convenience of follow-up refueling is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of grease nipples, and in particular relates to an adjustable grease nipple. Background Art

[0002] Grease nipple is a pressure injection oil cup, which is the simplest way of mechanical lubrication. It is divided into: straight-through pressure injection oil cup, joint-type pressure injection oil cup, screw-on pressure injection oil cup. It is used to connect the grease gun and mechanical equipment.

[0003] A blunt-angle grease nipple device disclosed in patent CN106895247A includes a circular cavity, an upper connecting structure and a longitudinal connecting structure, wherein the circular cavity is located between the upper connecting structure and the longitudinal connecting structure, and a cavity is provided inside the upper connecting structure and the longitudinal connecting structure. The circular cavity, the upper connecting structure and the longitudinal connecting structure are an integrated structure, the upper connecting structure is located at the top, the longitudinal connecting structure is in a longitudinal state, the upper connecting structure and the longitudinal connecting structure are at an obtuse angle along their respective axes, the angle range is greater than 90 degrees and less than 180 degrees, and a sealing port is provided at the end of the upper connecting structure.

[0004] In the above scheme, the upper connecting structure and the longitudinal connecting structure are arranged in a style with a certain angle to facilitate the connection between the oil nozzle and the oil gun, but the lower side of the longitudinal connecting structure is fixed to the equipment by threads, and the upper connecting structure and the longitudinal connecting structure are also fixedly connected for sealing. When the grease nipple is screwed into the equipment and tightened, the oil inlet of the upper connecting structure will be fixed in one direction according to the setting of the thread parameters, and the direction of the oil inlet may be blocked by equipment parts, especially when the oil nozzle is installed on the equipment for the first time, the direction of the oil nozzle after fixation is random, which greatly affects the subsequent refueling operation. Utility Model Content

[0005] The purpose of the utility model is to provide an adjustable grease nipple which can solve the above technical problems.

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

[0007] An adjustable grease nipple comprises a connecting pipe and an input pipe, wherein the connecting pipe is movably sleeved on one end of the input pipe and the pipelines of the two are connected, an adjustable fastening cap which can rotate circumferentially is arranged on the input pipe, the adjustable fastening cap is connected to the connecting pipe, a one-way valve is arranged on the other end of the input pipe, and a docking locking assembly is circumferentially arranged on the outer wall of the one-way valve.

[0008] In the adjustable grease nipple, a limiting ring is provided on the outer wall of the input pipe, one end face of the limiting ring abuts against the pipe mouth of the connecting pipe, and the other end face of the limiting ring abuts against the adjusting fastening cap, and a thread connected to the outer wall of the connecting pipe is provided inside the adjusting fastening cap.

[0009] In the adjustable grease nipple, a sealing layer is provided on one end face of the limiting ring, and the sealing layer abuts against the pipe mouth of the connecting pipe. A sliding layer is provided on the other end face of the limiting ring, and the sliding layer abuts against the adjusting fastening cap.

[0010] In the adjustable grease nipple, the sealing layer is provided with wavy or sawtooth-shaped protrusions, and the pipe opening of the connecting pipe is provided with a groove corresponding to the sealing layer.

[0011] In the adjustable grease nipple, a plurality of positioning protrusions are circumferentially arranged on the outer tube wall of the input tube, and the positioning protrusions are in contact with the inner wall of the connecting tube.

[0012] In the adjustable grease nipple, the docking locking assembly includes a locking head and a locking notch, the locking head is arranged on a side close to the valve port of the one-way valve, and the locking notch is axially opened on the outer surface of the locking head.

[0013] In the adjustable grease nipple, an annular groove is provided on the outer circumference of the locking head, a locking ring is sleeved in the annular groove, and the locking ring moves closer to the locking head under the action of a spring.

[0014] In the adjustable grease nipple, the input pipe includes a straight pipe and a curved pipe that are connected to each other, the straight pipe is connected to the connecting pipe, and the curved pipe is connected to the one-way valve after bending the straight pipe by 90°.

[0015] In the adjustable grease nipple, an oil chamber connected to the elbow is arranged in the one-way valve, a valve core is arranged in the oil chamber, and the valve core abuts against the oil inlet of the one-way valve under the action of a valve spring.

[0016] In the adjustable grease nipple, a reinforcing sleeve is provided on the side of the connecting pipe away from the input pipe, and a fixing flange is provided on the outer periphery of the reinforcing sleeve.

[0017] The advantages of the utility model are:

[0018] The connecting pipe and the input pipe are connected by a rotatable socket and are sealed and fixed by adjusting the fastening cap. No matter how the connecting pipe is connected to the equipment, the input pipe can change its angle according to actual usage during installation, so that the input pipe can avoid obstruction of the equipment to ensure convenience for subsequent refueling.

[0019] At the same time, a docking locking assembly is provided on the one-way valve at the end of the inlet pipe, which allows the oil gun to be quickly connected to the oil nozzle. Especially when the oil nozzle is set at the upper end of the equipment and at a certain height from the ground, the docking locking assembly can be more conducive to the manual remote connection of the oil nozzle and the oil gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 It is a schematic diagram of the internal structure of the utility model.

[0022] Figure 3 This is a schematic diagram of the input pipe structure of the utility model.

[0023] Figure 4 This is a schematic diagram of the connecting pipe structure of the utility model.

[0024] In the figure, there are connecting pipe 1, reinforcing sleeve 11, input pipe 2, adjusting fastening cap 21, limiting ring 22, straight pipe 23, curved pipe 24, one-way valve 3, valve core 31, valve spring 32, docking locking assembly 4, locking head 41, locking notch 42, and locking ring 43. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the utility model and the accompanying drawings to further describe the technical solution of the utility model, but the utility model is not limited to these embodiments.

[0026] like Figure 1-Figure 4 As shown, the adjustable grease nipple includes a connecting pipe 1 and an input pipe 2, and is characterized in that the connecting pipe 1 is movably sleeved on one end of the input pipe 2 and the pipelines of the two are connected, an adjustable fastening cap 21 that can rotate circumferentially is provided on the input pipe 2, the adjustable fastening cap 21 is connected to the connecting pipe 1, a one-way valve 3 is provided at the other end of the input pipe 2, and a docking locking assembly 4 is circumferentially provided on the outer wall of the one-way valve 3.

[0027] That is, the entire grease nipple is composed of two parts, the connecting pipe 1 and the input pipe 2 are connected by a rotatable socket, and are sealed and fixed by adjusting the fastening cap 21. No matter how the connecting pipe 1 is connected to the equipment, the input pipe 2 can change its angle according to actual usage during installation, so that the input pipe 2 can avoid the obstruction of the equipment to ensure the convenience of subsequent refueling.

[0028] A docking locking assembly 4 is provided on the one-way valve 3 at the end of the input pipe 2, which allows the oil gun to be quickly connected to the oil nozzle. In particular, when the oil nozzle is arranged at the upper end of the equipment and at a certain height from the ground, the docking locking assembly 4 can be more conducive to the manual remote connection of the oil nozzle and the oil gun, and ensure the firmness of the connection between the oil gun and the oil nozzle.

[0029] In this embodiment, a limiting ring 22 is provided on the outer wall of the input pipe 2, one end face of the limiting ring 22 abuts against the pipe mouth of the connecting pipe 1, and the other end face of the limiting ring 22 abuts against the adjusting fastening cap 21, and a thread connected to the outer wall of the connecting pipe 1 is provided inside the adjusting fastening cap 21.

[0030] The diameter of the limiting ring 22 is greater than or equal to the outer diameter of the connecting pipe 1, so the end face of the limiting ring 22 can be against the end face of the pipe mouth of the connecting pipe 1, thereby limiting the depth of the input pipe 2 inserted into the connecting pipe 1, and the adjusting fastening cap 21 squeezes the other end face of the limiting ring 22 through the threaded connection with the connecting pipe 1, so that the input pipe 2 can be fixedly connected to the connecting pipe 1.

[0031] In this embodiment, a sealing layer is provided on one end face of the limiting ring 22 , which abuts against the pipe opening of the connecting pipe 1 , and a sliding layer is provided on the other end face of the limiting ring 22 , which abuts against the adjusting and fastening cap 21 .

[0032] Under the locking and squeezing of the adjusting and fastening cap 21, the limiting ring 22 and the pipe opening of the connecting pipe 1 form a sealing structure, so that the butter flowing in the pipe is isolated from the environment outside the pipe to prevent butter leakage. The sliding layer can reduce the friction resistance between the limiting ring 22 and the adjusting and fastening cap 21, and prevent the adjusting and fastening cap 21 from causing the input pipe 2, which has been positioned in the direction, to change its angle when rotating.

[0033] Preferably, the sealing layer is provided with wavy or serrated protrusions, and the pipe opening of the connecting pipe 1 is provided with a groove corresponding to the sealing layer.

[0034] As the adjusting and fastening cap 21 is gradually tightened, the pressure of the adjusting and fastening cap 21 on the sliding layer increases. The increased friction between the two may cause the adjusting and fastening cap 21 to drive the input pipe 2 during rotation. Therefore, matching concave and convex patterns are provided on the sealing layer and the pipe opening of the connecting pipe 1 to completely prevent the problem of the input pipe 2 rotating with the adjusting and fastening cap 21.

[0035] Preferably, a plurality of positioning protrusions are circumferentially arranged on the outer tube wall of the inlet tube 2 , and the positioning protrusions are in contact with the inner wall of the connecting tube 1 .

[0036] Positioning protrusions are evenly arranged circumferentially on the outer tube wall of the part of the input tube 2 inserted into the connecting tube 1. The positioning protrusions are supported on the inner wall of the connecting tube 1 to fill the gap between the input tube 2 and the connecting tube 1, making the connection between the input tube 2 and the connecting tube 1 more stable and ensuring the sealing effect between the two tubes.

[0037] In this embodiment, the docking locking assembly 4 includes a locking head 41 and a locking notch 42 . The locking head 41 is arranged on a side close to the valve port of the one-way valve 3 , and the locking notch 42 is axially opened on the outer surface of the locking head 41 .

[0038] The locking head 41 is used to connect with the oil gun. A locking notch 42 is provided on one side of the locking head 41, and the oil filling port of the oil gun also has a corresponding shape. After the oil filling port of the oil gun is connected with the locking head 41, they are rotated at a certain angle so that the locking notches 42 of the two are staggered, thereby realizing the connection and locking of the oil gun and the oil nozzle, and the oil gun cannot be axially separated from the oil nozzle.

[0039] Preferably, an annular sliding groove is provided on the outer circumference of the locking head 41 , a locking ring 43 is sleeved in the annular sliding groove, and the locking ring 43 moves closer to the locking head 41 under the action of a spring.

[0040] When the connection between the oil gun and the oil nozzle is locked, the end of the locking head 41 away from the oil filling port abuts against the gun head structure of the oil gun, so that the oil gun cannot be axially disengaged without changing its angle, and the locking ring 43 is pressed against the gun head structure of the oil gun through a spring, so that the gun head structure of the oil gun abuts against the end face of the locking head 41 away from the oil filling port, thereby improving the connection stability between the oil gun and the oil nozzle.

[0041] In this embodiment, the input pipe 2 includes a straight pipe 23 and a curved pipe 24 which are connected to each other. The straight pipe 23 is connected to the connecting pipe 1 , and the curved pipe 24 is connected to the one-way valve 3 after being bent 90° to the straight pipe 23 .

[0042] The inlet pipe 2 is provided with a right-angle bend to effectively avoid obstruction by equipment components, thereby making the refueling operation more convenient. Especially when refueling large equipment, the oil tank is set on the upper part of the equipment, and the oil nozzle mouth faces upward, which makes it very difficult to connect the oil gun and the oil nozzle, and it is very inconvenient for personnel to operate. Therefore, the one-way valve 3 is placed toward the outside of the equipment.

[0043] Of course, the specific shape of the input tube 2 needs to be determined according to the structure of the device, and can be an arc-shaped bend or a multi-section bend.

[0044] Preferably, an oil chamber connected to the elbow 24 is provided in the one-way valve 3 , a valve core 31 is provided in the oil chamber, and the valve core 31 abuts against the oil inlet of the one-way valve 3 under the action of a valve spring 32 .

[0045] When the oil gun and the oil nozzle are connected, a push-up structure is provided on the nozzle of the oil gun. During the connection process, the push-up structure pushes the valve core 31 into the one-way valve 3, and the butter can be injected into the pipeline from the gap between the valve core 31 and the oil inlet.

[0046] In this embodiment, a reinforcing sleeve 11 is provided on the side of the connecting pipe 1 away from the input pipe 2 , and a fixing flange is provided on the outer periphery of the reinforcing sleeve 11 .

[0047] The reinforcing sleeve 11 covers the lower side of the connecting pipe 1, so that the connecting pipe 1 has a stronger bending resistance. The bottom connecting pipe 1 has better stability so that the oil gun can be docked more easily. The fixing flange is welded to the reinforcing sleeve 11 as a whole, and the flange is connected to the equipment to fix the reinforcing sleeve 11 at a preset position.

[0048] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An adjustable grease nipple, comprising a connecting pipe (1) and an inlet pipe (2), characterized in that: The connecting pipe (1) is movably sleeved on one end of the input pipe (2) and the two pipes are connected; the input pipe (2) is provided with an adjustable fastening cap (21) that can rotate circumferentially; the adjustable fastening cap (21) is connected to the connecting pipe (1); the other end of the input pipe (2) is provided with a one-way valve (3); and a docking locking assembly (4) is circumferentially provided on the outer wall of the one-way valve (3).

2. The adjustable grease nipple according to claim 1, characterized in that: A limiting ring (22) is provided on the outer wall of the input pipe (2), one end face of the limiting ring (22) abuts against the pipe mouth of the connecting pipe (1), and the other end face of the limiting ring (22) abuts against the adjusting and fastening cap (21), and a thread connected to the outer wall of the connecting pipe (1) is provided inside the adjusting and fastening cap (21).

3. The adjustable grease nipple according to claim 2, characterized in that: A sealing layer is provided on one end surface of the limiting ring (22), and the sealing layer abuts against the pipe opening of the connecting pipe (1); a sliding layer is provided on the other end surface of the limiting ring (22), and the sliding layer abuts against the adjusting and fastening cap (21).

4. The adjustable grease nipple according to claim 3, characterized in that: The sealing layer is provided with wave-shaped or sawtooth-shaped protrusions, and the pipe opening of the connecting pipe (1) is provided with a groove corresponding to the sealing layer.

5. The adjustable grease nipple according to claim 2, characterized in that: A plurality of positioning protrusions are circumferentially arranged on the outer tube wall of the input tube (2), and the positioning protrusions are in contact with the inner wall of the connecting tube (1).

6. The adjustable grease fitting according to claim 1, characterized in that: The docking locking assembly (4) comprises a locking head (41) and a locking notch (42); the locking head (41) is arranged on a side close to the valve port of the one-way valve (3); and the locking notch (42) is axially opened on the outer surface of the locking head (41).

7. The adjustable grease fitting according to claim 6, characterized in that: An annular sliding groove is provided on the outer circumference of the locking head (41), a locking ring (43) is sleeved in the annular sliding groove, and the locking ring (43) moves closer to the locking head (41) under the action of a spring.

8. The adjustable grease fitting according to claim 1, characterized in that: The input pipe (2) comprises a straight pipe (23) and a curved pipe (24) which are connected to each other. The straight pipe (23) is connected to the connecting pipe (1), and the curved pipe (24) is connected to the one-way valve (3) after being bent 90 degrees to the straight pipe (23).

9. The adjustable grease fitting according to claim 8, characterized in that: An oil chamber in communication with the bent pipe (24) is provided in the one-way valve (3), a valve core (31) is provided in the oil chamber, and the valve core (31) abuts against the oil inlet of the one-way valve (3) under the action of a valve spring (32).

10. The adjustable grease fitting according to claim 1, wherein: A reinforcing sleeve (11) is provided on the side of the connecting pipe (1) away from the input pipe (2), and a fixing flange is provided on the outer periphery of the reinforcing sleeve (11).

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