Joint Structure of High Pressure Grease Gun Tubing

Abstract

A joint structure of high pressure grease gun tubing is an oil pipe connected to a high pressure grease gun, and the end of the oil pipe is connected with a rotatable joint, and the joint includes a joint connected with the oil pipe for that the grease can pass through the middle through hole, and the end of the joint is sequentially provided with a first shaft part, a second shaft part with an outer diameter slightly larger than the first shaft part and a caulking groove for the oil sealing washer and the oil sealing ring to be sleeved, and a rotary joint has the thread on the outside end and the grease can pass in its middle. The inside end of the rotary joint is embedded into the caulking groove of the joint, and a first coupling part for coupling of the first shaft part is arranged in the middle of the rotary joint, which is closely fitted with the oil sealing ring and the oil sealing washer. A second coupling part for coupling of the second shaft part makes that the rotary joint can be rotated on the joint without falling out, and that it is easier to connect with the grease nozzle of the lubricating grease, and also there is no leakage under the action of high pressure grease.

Claims

1. A joint structure of high pressure grease gun tubing is a joint that is connected to an oil pipe; the joint is provided with a first shaft part and a second shaft part in a sequence from the outer end to the inside end, so that the first shaft part is sequentially sleeved on an oil sealing washer and an oil sealing ring and abutted on the second shaft part, and a rotary joint with a screw thread on the outer side thereof is provided with a first coupling part and a second coupling part for coupling of the first shaft part and second shaft part, and also the oil sealing washer and the oil sealing ring are tightly fitted in the second coupling part, and then the rotary joint can be rotatably embedded in the joint.

2. The joint structure of high pressure grease gun tubing defined in claim 1, wherein a caulking groove is arranged inside the second shaft part of the joint, and a nesting part is arranged at the inside the rotary joint, so that the end of the nesting part is pressed and embedded in the caulking groove, so that the rotary joint can be rotated on the joint without falling out.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0011] FIG. 1 is a schematic diagram of the general high pressure grease gun structure.

[0012] FIG. 2 is a three-dimensional schematic diagram of the joint at the end of the general high pressure grease gun oil pipe.

[0013] FIG. 3 is a three-dimensional schematic diagram of the joint at the end of the oil pipe of the present invention.

[0014] FIG. 4 is a three-dimensional decomposition schematic diagram of the joint at the end of the oil pipe of the present invention.

[0015] FIG. 5 is a sectional schematic diagram of the joint at the end of the oil pipe of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0016] Referring to FIGS. 3 to 5, the end of the oil pipe 2 on the grease gun of the present invention is connected with a joint 3, and the joint 3 is also pressed by the two ends of the casing pipe 32 to form a tight part 321, the pipe 2 is tightly connected between the joint 3 and the casing pipe 32, and the outer end of the joint 3 is sequentially provided with a first shaft part 33 and a second shaft part 34 with an outer diameter slightly larger than the first shaft part 33, and provided with a recessed caulking groove 35, so that an oil sealing washer 36 and an oil sealing ring 37 are sleeved on the first shaft part 33 in a sequence, and abutted on the second shaft part 34.

[0017] Further, a rotary joint 38 is provided. The outside end of the rotary joint 38 is provided with a screw thread 381, the inside end is provided with a nesting part 382, and a first coupling part 384 is provided at the middle of the middle through-hole of the rotary joint 38 and a second coupling part 385 is provided at the inside end. Further, the first shaft part 33 of the joint 3 is axially coupled with the first coupling part 384 of the rotary joint 38, and the second shaft part 34 of the joint 3 is axially coupled with the second coupling part 385 of the rotary joint 38, and the oil sealing washer 36 and oil and the sealing ring 37 is fitted into the second coupling part 385. Then, when the rotary joint 38 is sleeved on the joint 3, the end of the nesting part 382 is pressed to form the embedded part 383 embedded in the caulking groove 35 of the joint 3, so that the rotary joint 38 can be rotatably embedded in the joint 3 without falling out; also, the oil sealing washer 36 is made of the wear-resistant material of the Teflon-like type, so that the first shaft part 33 can be fitted closely with the second coupling part 385, and the oil sealing ring 37 is made of the rubber and also the first shaft part 33 can be fitted closely with the second coupling part 385.

[0018] Therefore, as long as the rotary joint 38 on the joint 3 at the end of the oil pipe 2 of the grease gun is directly rotated, the rotary joint 38 can be screwed into the grease nozzle to be injected with the lubricating grease, so that the grease gun or the oil pipe 2 does not have to be rotated together, the entire connection operation is easier, and also through the leakage-blocking effect of the oil sealing washer 36 and oil sealing ring 37, the high-pressure lubricating grease will not be leaked from the rotary joint 38, ensuring the smoothly filling operation of the lubricating grease.

[0019] Further, when the rotary joint 38 is locked on the grease nozzle and the high pressure grease gun is started, so that the high pressure lubricating grease generated in the oil pipe 2 is injected into the grease nozzle, at this time the high pressure lubricating grease will also entering the second coupling part 385 via the first coupling part 384, the high pressure lubricating grease will push and extrude the oil sealing washer 36 and the oil sealing ring 37, the rotary joint 38 cannot be rotated, so as to ensure that the rotary joint 38 will not be loosened due to the external force when the lubricating grease is filled, and the high safe filling operation the lubricating grease can be achieved.