Grease discharge system and grease gun

Abstract

The invention provides an oil discharge system and a grease gun, the oil discharge system comprises a pump body, an oil storage pipe connected with the pump body and an eccentric reciprocating assembly installed at the top end of the pump body, the eccentric reciprocating assembly comprises a plunger, and the plunger can reciprocate in the pump body, so that grease in the oil storage pipe enters a grease injection device through a grease outlet loop; the oil outlet loop comprises an oil outlet cavity and an overflow hole which are communicated with each other, the overflow hole is communicated with the oil storage pipe, the oil discharge system further comprises a pressure regulating assembly assembled in the oil outlet loop, in the initial state, the oil outlet cavity and the overflow hole are blocked by the pressure regulating assembly, and when the pressure in the oil outlet cavity is larger than the output pressure of the pressure regulating assembly, the pressure regulating assembly generates displacement; and the oil outlet cavity is communicated with the overflow hole, so that the grease in the oil outlet cavity flows back into the oil storage pipe through the overflow hole. Compared with the prior art, overflowing grease can be discharged back into the grease storage pipe, grease waste is avoided, meanwhile, the surface of the grease gun is kept clean, and the problem that grease is difficult to remove is solved.

Description

Technical Field

[0001] The invention relates to an oil discharge system and a grease gun, belonging to the technical field of grease guns. Background Art

[0002] A grease gun is a hand tool used to add grease to mechanical equipment.

[0003] The existing grease gun solution will remind the operator that the oil filling pressure has been reached by external overflow after reaching high pressure. Although this method is effective, after reaching high pressure, the overflow device will spray grease to the outside, which not only causes grease waste, but also makes it difficult to clean the grease splashed.

[0004] In view of this, it is necessary to improve the existing grease gun oil discharge system to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide an oil discharge system which can not only avoid grease waste but also keep the surface of a grease gun clean.

[0006] To achieve the above-mentioned purpose, the present invention provides an oil discharge system, comprising: a pump body, an oil storage pipe connected to the pump body, and an eccentric reciprocating component installed at the top of the pump body, the eccentric reciprocating component comprising a plunger, the plunger being able to reciprocate in the pump body to make the grease in the oil storage pipe enter the external oil filling device through the oil outlet circuit, the oil outlet circuit comprising an oil outlet chamber and an overflow hole connected to each other, the overflow hole being connected to the oil storage pipe, the oil discharge system also comprises a pressure regulating component assembled in the oil outlet circuit, in an initial state, the pressure regulating component blocks the oil outlet chamber and the overflow hole, so that the grease in the oil outlet chamber flows into the external oil filling device; and when the pressure in the oil outlet chamber is greater than the pressure output by the pressure regulating component, the pressure regulating component is displaced to make the oil outlet chamber connected to the overflow hole, and the grease in the oil outlet chamber flows back to the oil storage pipe through the overflow hole.

[0007] As a further improvement of the present invention, the pressure regulating assembly includes a first spring, a valve core located at one end of the first spring, and a third steel ball connected to the valve core. The oil outlet chamber is connected to the overflow hole through a through hole. In an initial state, the third steel ball fits into the through hole to block the oil outlet chamber and the overflow hole. When the pressure in the oil outlet chamber is greater than the pressure output by the pressure regulating assembly, the third steel ball detaches from the through hole to connect the oil outlet chamber with the overflow hole.

[0008] As a further improvement of the present invention, the pressure regulating assembly also includes an adjusting knob and an adjusting structure. The adjusting knob is rotated to adjust the pressure output by the pressure regulating assembly. One end of the adjusting structure is threadedly connected to the pump body, and the other end is connected to the adjusting knob and can rotate with the adjusting knob to achieve axial movement in the pump body. The adjusting knob is clamped with the pump body.

[0009] As a further improvement of the present invention, the adjusting knob is provided with a first gear, a second gear and a third gear. When the adjusting knob is rotated to the first gear, the pressure regulating assembly outputs a first pressure. When the adjusting knob is rotated to the second gear, the pressure regulating assembly outputs a second pressure. When the adjusting knob is rotated to the third gear, the pressure regulating assembly outputs a third pressure, wherein the first pressure is greater than the second pressure, and the second pressure is greater than the third pressure.

[0010] As a further improvement of the present invention, a first gear mark, a second gear mark and a third gear mark are provided on the pump body, and an indicator arrow is provided on the adjusting knob. When the adjusting knob is rotated to the first gear, the indicator arrow points to the first gear mark, and at this time, the first pressure output by the pressure regulating assembly is the maximum; when the adjusting knob is rotated to the second gear, the indicator arrow points to the second gear mark, and at this time, the second pressure output by the pressure regulating assembly is half of the first pressure; when the adjusting knob is rotated to the third gear, the indicator arrow points to the third gear mark, and at this time, the third pressure output by the pressure regulating assembly is zero, so that the oil outlet chamber is connected to the overflow hole.

[0011] As a further improvement of the present invention, the pressure regulating assembly also includes a second spring and a second steel ball, one end of the second spring abuts against the pump body, and the other end fits against the second steel ball, and the second steel ball abuts against the adjusting knob to achieve shifting of the adjusting knob.

[0012] As a further improvement of the present invention, the oil discharge system further includes a reduction assembly, which is connected to the eccentric reciprocating assembly to provide power for the eccentric reciprocating assembly to drive the plunger to reciprocate.

[0013] As a further improvement of the present invention, the oil discharge system also includes a control component, which includes a controller and an alarm. The controller is used to control the alarm to issue a reminder when the pressure in the oil outlet chamber reaches the pressure output by the pressure regulating component, so that the oil injection device stops working and achieves quantitative oil supply.

[0014] As a further improvement of the present invention, the oil drainage system further comprises an oil drainage pipe assembly, which is connected to the pump body and communicates with the oil outlet cavity, so that the gas in the oil storage pipe is discharged through the oil drainage pipe assembly.

[0015] Another object of the present invention is to provide a grease gun having the above-mentioned oil discharge system.

[0016] To achieve the above-mentioned purpose, the present invention provides a grease gun, comprising a casing, a motor installed inside the casing, and an oil discharge system partially accommodated in the casing, the oil discharge system comprising a pump body, an oil storage pipe connected to the pump body, and an eccentric reciprocating component installed at the top of the pump body, the eccentric reciprocating component comprising a plunger, the plunger can reciprocate in the pump body, so that the grease in the oil storage pipe enters an external oil injection device through an oil outlet circuit, the oil outlet circuit comprises an oil outlet chamber and an overflow hole connected to each other, the overflow hole is connected to the oil storage pipe, the oil discharge system also comprises a pressure regulating component assembled in the oil outlet circuit, in an initial state, the pressure regulating component blocks the oil outlet chamber and the overflow hole, so that the grease in the oil outlet chamber flows into the external oil injection device; and when the pressure in the oil outlet chamber is greater than the pressure output by the pressure regulating component, the pressure regulating component is displaced, so that the oil outlet chamber is connected to the overflow hole, and the grease in the oil outlet chamber flows back to the oil storage pipe through the overflow hole.

[0017] The beneficial effects of the present invention are as follows: the oil discharge system of the present invention is provided with an oil discharge circuit in the pump body, the oil discharge circuit includes an oil discharge chamber and an overflow hole which are interconnected, and the overflow hole is connected to the oil storage pipe, and the pressure regulating component is assembled in the oil discharge circuit, so that in the initial state, the oil discharge chamber and the overflow hole can be blocked by the pressure regulating component, so that the grease in the oil discharge chamber can smoothly flow into the external oil filling device; and when the pressure in the oil discharge chamber is greater than the pressure output by the pressure regulating component, the pressure regulating component is used to generate displacement, so that the oil discharge chamber is connected to the overflow hole, so that the grease in the oil discharge chamber flows back into the oil storage pipe through the overflow hole. Compared with the prior art, the oil discharge system of the present invention can discharge the overflowed grease back to the oil storage pipe, avoiding the waste of grease while keeping the surface of the grease gun clean, solving the problem of grease being difficult to remove. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the grease gun of the present invention.

[0019] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure of the grease gun from another angle.

[0020] Figure 3 yes Figure 1 Schematic diagram of the internal structure assembly of the grease gun.

[0021] Figure 4 yes Figure 1 Cross-section of a grease gun.

[0022] Figure 5 yes Figure 4 Enlarged view of the circle A in the middle.

[0023] Figure 6 yes Figure 3 Assembly diagram of the medium voltage regulating component.

[0024] Figure 7 yes Figure 6 Schematic diagram of the three-dimensional structure of the middle adjustment knob.

[0025] Figure 8 yes Figure 6 Schematic diagram of the three-dimensional structure of the middle adjustment column.

[0026] Fig. 9 yes Figure 6 Schematic diagram of the three-dimensional structure of the middle adjustment part.

[0027] Fig.10 yes Figure 3 Assembly diagram of the pump body, pressure regulating component and motor.

[0028] Fig.11 yes Fig.10 Enlarged view of the circle B in the middle. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] See also Figure 1-Figure 3 As shown, the present invention discloses a grease gun 100, including a housing 101, a motor 102 installed in the housing 101 and an oil discharge system partially accommodated in the housing 101, the oil discharge system includes a pump body 103, an oil storage pipe 104, an eccentric reciprocating component 105, a pressure regulating component 106, a speed reduction component (not shown), an oil discharge pipe component 108, and a control component 109.

[0031] The pump body 103 is connected to the oil storage pipe 104 and is used to pump out grease from the oil storage pipe 104. An oil outlet circuit is provided in the pump body 103, and the oil outlet circuit includes an oil outlet chamber 1 and an overflow hole 2 which are connected to each other. The overflow hole 2 is connected to the oil storage pipe 104. The eccentric reciprocating assembly 105 is installed at the top of the pump body 103. The eccentric reciprocating assembly 105 includes a plunger 3. The plunger 3 can reciprocate in the pump body 103, so that the grease in the oil storage pipe 104 enters the oil outlet chamber 1 and is then discharged into an external oil filling device (not shown) through the oil discharge pipe assembly 108. When the grease gun 100 is about to be filled with grease, When the reciprocating motion has not stopped, the pressure in the oil outlet chamber 1 will rise; the pressure regulating component 106 is installed in the oil outlet circuit, and is used to adjust the pressure in the pump body 103 to control the oil output of the grease gun 100. In the initial state, the pressure regulating component 106 blocks the oil outlet chamber 1 and the overflow hole 2, so that the grease in the oil outlet chamber 1 flows into the external oil filling device; and when the pressure in the oil outlet chamber 1 is greater than the pressure output by the pressure regulating component 106, the pressure regulating component 106 is displaced, so that the oil outlet chamber 1 is connected with the overflow hole 2, and the grease in the oil outlet chamber 1 flows back to the oil storage pipe 104 through the overflow hole 2.

[0032] The control assembly 109 is installed in the housing 101, and the control assembly 109 includes a controller 4 and an alarm 5. The controller 4 is used to control the alarm 5 to issue a reminder when the pressure in the oil outlet chamber 1 reaches the pressure output by the pressure regulating assembly 106, so that the grease gun 100 stops working and achieves quantitative oil supply. The alarm 5 includes a lighting lamp and a buzzer. The lighting lamp is used to emit light and flash, and the buzzer is used to emit a warning sound. The speed reduction assembly is connected to the motor 102 and the eccentric reciprocating assembly 105, providing power for the eccentric reciprocating assembly 105 to drive the plunger 3 to reciprocate.

[0033] like Figure 4-Figure 9 As shown, the pressure regulating assembly 106 includes a first spring 6, a valve core 7 located at one end of the first spring 6, and a third steel ball 8 connected to the valve core 7. The oil outlet chamber 1 is connected to the overflow hole 2 through a through hole 9. In the initial state, the third steel ball 8 fits with the through hole 9 to block the oil outlet chamber 1 and the overflow hole 2. When the pressure in the oil outlet chamber 1 is greater than the pressure output by the pressure regulating assembly 106, the third steel ball 8 is separated from the through hole 9, so that the oil outlet chamber 1 is connected to the overflow hole 2. It can be understood that a guide groove (not numbered) is provided around one end of the valve core 7 close to the third steel ball 8. After the third steel ball 8 is separated from the through hole 9, the grease in the oil outlet chamber 1 will flow into the overflow hole 2 through the guide groove and finally flow back to the oil storage pipe 104.

[0034] The pressure regulating assembly 106 also includes an adjusting knob 10 and an adjusting structure 11. The adjusting knob 10 is rotated to adjust the pressure output by the pressure regulating assembly 106. One end of the adjusting structure 11 is threadedly connected to the pump body 103, and the other end is connected to the adjusting knob 10 and can rotate with the adjusting knob 10 to achieve axial movement in the pump body 103.

[0035] Specifically, the adjustment structure 11 includes an adjustment column 12 and an adjustment member 13, one end of the adjustment column 12 is connected to the adjustment knob 10, and the other end is threadedly connected to the pump body 103, and the adjustment member 13 is accommodated in the adjustment column 12 and threadedly connected to the adjustment column 12. When the adjustment knob 10 is rotated, the adjustment column 12 and the adjustment member 13 as a whole follow the rotation of the adjustment knob 10 and move axially in the pump body 103. The adjustment member 13 is also configured to be able to rotate relative to the adjustment column 12 and move axially in the adjustment column 12 to achieve fine-tuning of the pressure.

[0036] The pressure regulating assembly 106 also includes a first steel ball 14, which is located at one end of the first spring 6 away from the valve core 7, the first steel ball 14 is located in the adjusting column 12 and in contact with the adjusting member 13, one end of the first spring 6 is sleeved on the valve core 7, and the other end is in contact with the first steel ball 14, when the adjusting column 12 and the adjusting member 13 move axially, the first spring 6 is compressed.

[0037] The adjusting column 12 is cylindrical, and a positioning member 121 protruding outward is provided on the outer peripheral wall of the adjusting column 12. A fixing groove 16 is correspondingly provided in the adjusting knob 10. The positioning member 121 is received in the fixing groove 16 and can move axially relative to the fixing groove 16. A first thread structure 122 is provided on the outer peripheral wall of the adjusting column 12 at one end away from the positioning member 121. The adjusting column 12 is connected to the pump body 103 through the first thread structure 122, so that when the adjusting knob 10 is turned, the adjusting column 12 can move axially in the pump body 103.

[0038] The adjusting column 12 is of a hollow annular structure. A second thread structure 123 is provided on the inner peripheral wall of the adjusting column 12 near one end of the adjusting knob 10. A third thread structure 131 corresponding to the second thread structure 123 is provided on the outer peripheral wall of the adjusting member 13, so that the adjusting member 13 can axially move within the adjusting column 12. The adjusting member 13 is provided in a cylindrical shape. A limiting groove 132 is provided at one end of the adjusting member 13 near the adjusting knob 10. An adjusting hole 1001 is correspondingly provided on the adjusting knob 10. The limiting groove 132 and the adjusting hole 1001 are aligned with each other and exposed, so that after the pressure regulating assembly 106 is assembled, it can pass through the adjusting hole 1001 and cooperate with the limiting groove 132 to adjust the position of the adjusting member 13 within the adjusting column 12, thereby realizing fine adjustment of the pressure.

[0039] Preferably, the adjusting knob 10 and the pump body 103 are connected by a snap connection. An outwardly protruding snap 1002 is provided on the outer side wall of the adjusting knob 10. A snap groove (not labeled) corresponding to the snap 1002 is provided on the inner peripheral wall of the pump body 103. The snap groove is provided in a ring shape, so that the adjusting knob 10 can rotate relative to the pump body 103. The adjusting knob 10 further includes a decorative cover 17 for covering the adjusting hole 1001. The decorative cover 17 is movably connected to the adjusting knob 10.

[0040] As Figure 10-11 shown, the adjusting knob 10 is provided with a first gear position, a second gear position and a third gear position. When the adjusting knob 10 rotates to the first gear position, the pressure regulating assembly 106 outputs a first pressure. When the adjusting knob 10 rotates to the second gear position, the pressure regulating assembly 106 outputs a second pressure. When the adjusting knob 10 rotates to the third gear position, the pressure regulating assembly 106 outputs a third pressure. Among them, the first pressure is greater than the second pressure, and the second pressure is greater than the third pressure. Preferably, a stop post 1003 is provided on the adjusting knob 10, so that the rotation direction of the adjusting knob 10 is to rotate from the first gear position to the second gear position and then to the third gear position, or from the third gear position to the second gear position and then to the first gear position.

[0041] The pump body 103 is provided with a first gear mark 1031, a second gear mark 1032 and a third gear mark 1033, and the regulating knob 10 is provided with an indication arrow 1004. When the regulating knob 10 is rotated to the first gear, the indication arrow 1004 points to the first gear mark 1031, and at this time, the first pressure output by the pressure regulating component 106 is maximum; when the regulating knob 10 is rotated to the second gear, the indication arrow 1004 points to the second gear mark 1032, and at this time, the second pressure output by the pressure regulating component 106 is half of the first pressure; when the regulating knob 10 is rotated to the second gear, the indication arrow 1004 points to the second gear mark 1032, and at this time, the second pressure output by the pressure regulating component 106 is half of the first pressure; When the adjusting knob 10 is rotated to the third gear, the indicating arrow 1004 points to the third gear mark 1033. At this time, the third pressure output by the pressure regulating assembly 106 is zero, so that the oil outlet chamber 1 is connected with the overflow hole 2; further, when the oil outlet chamber 1 is in a high-pressure state, the pressure can be relieved by rotating the adjusting knob 10 to the third gear, thereby facilitating the removal of the oil drain pipe assembly 108, and the oil drain pipe assembly 108 is connected with the oil outlet chamber 1, so that the gas brought into the oil storage pipe 104 when storing oil is discharged through the oil drain pipe assembly 108.

[0042] like Figure 3 As shown, the pressure regulating assembly 106 also includes an adjusting knob 18, and the adjusting knob 18 can be rotated to switch between a non-quantitative gear and a quantitative gear. In this embodiment, the non-quantitative gear is displayed as NO, and the quantitative gear has 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, and 50 adjustment gears, which are not limited here.

[0043] like Figure 5 As shown, the pressure regulating assembly 106 also includes a second spring 19 and a second steel ball 20, one end of the second spring 19 is in contact with the pump body 103, and the other end is in contact with the second steel ball 20, the second steel ball 20 is in contact with the adjusting knob 10, and a rotation path (unnumbered) of the second steel ball 20 is correspondingly provided on the adjusting knob 10, and a groove (unnumbered) is provided on the rotation path, so that the adjusting knob 10 has a sense of position when shifting gears, and the second steel ball 20 is always in contact with the adjusting knob 10 during the rotation of the adjusting knob 10.

[0044] In summary, the oil discharge system of the present invention is provided with an oil discharge circuit in the pump body 103, the oil discharge circuit includes an oil discharge chamber 1 and an overflow hole 2 which are interconnected, and the overflow hole 2 is connected to the oil storage pipe 104, and the pressure regulating assembly 106 is assembled in the oil discharge circuit. In the initial state, the pressure regulating assembly 106 blocks the oil discharge chamber 1 and the overflow hole 2, so that the grease in the oil discharge chamber can smoothly flow into the external oil filling device; and when the pressure in the oil discharge chamber 1 is greater than the pressure output by the pressure regulating assembly 106, the pressure regulating assembly 106 is displaced, so that the oil discharge chamber 1 is connected to the overflow hole 2, so that the grease in the oil discharge chamber 1 flows back to the oil storage pipe 104 through the overflow hole 2. Compared with the prior art, the oil discharge system of the present invention can discharge the overflow grease back to the oil storage pipe 104, avoid the waste of grease, and keep the surface of the grease gun 100 clean, solving the problem of grease being difficult to remove.

[0045] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. An oil drainage system, include:

4. The oil pump of claim 1, wherein the piston is connected to the oil storage pipe connected to the pump body, and the piston is connected to the oil storage pipe connected to the pump body. The piston is connected to the oil storage pipe connected to the pump body, and the piston is connected to the oil storage pipe connected to the pump body. The piston is connected to the oil storage pipe connected to the pump body, and the piston is connected to the oil storage pipe connected to the pump body. The piston is connected to the oil storage pipe connected to the pump body, and the piston is connected to the oil storage pipe connected to the pump body. The piston is connected to the oil storage pipe connected to the pump body, and the piston is connected to the oil storage pipe connected to the pump body.

2. The oil discharge system according to claim 1, Features: The pressure regulating assembly includes a first spring, a valve core located at one end of the first spring, and a third steel ball connected to the valve core. The oil outlet chamber is connected to the overflow hole through a through hole. In an initial state, the third steel ball fits into the through hole to block the oil outlet chamber and the overflow hole. When the pressure in the oil outlet chamber is greater than the pressure output by the pressure regulating assembly, the third steel ball detaches from the through hole to connect the oil outlet chamber with the overflow hole.

3. The oil discharge system according to claim 1, Features: The pressure regulating assembly also includes an adjusting knob and an adjusting structure. The adjusting knob is rotated to adjust the pressure output by the pressure regulating assembly. One end of the adjusting structure is threadedly connected to the pump body, and the other end is connected to the adjusting knob and can rotate with the adjusting knob to achieve axial movement in the pump body. The adjusting knob is clamped with the pump body.

4. The oil discharge system according to claim 3, Features: The adjusting knob is provided with a first gear, a second gear and a third gear. When the adjusting knob is rotated to the first gear, the pressure regulating component outputs a first pressure. When the adjusting knob is rotated to the second gear, the pressure regulating component outputs a second pressure. When the adjusting knob is rotated to the third gear, the pressure regulating component outputs a third pressure, wherein the first pressure is greater than the second pressure, and the second pressure is greater than the third pressure.

5. The oil discharge system according to claim 4, Features: The pump body is provided with a first gear mark, a second gear mark and a third gear mark, and the adjusting knob is provided with an indicating arrow. When the adjusting knob is rotated to the first gear, the indicating arrow points to the first gear mark, and at this time, the first pressure output by the pressure regulating component is the maximum; when the adjusting knob is rotated to the second gear, the indicating arrow points to the second gear mark, and at this time, the second pressure output by the pressure regulating component is half of the first pressure; when the adjusting knob is rotated to the third gear, the indicating arrow points to the third gear mark, and at this time, the third pressure output by the pressure regulating component is zero, so that the oil outlet chamber is connected with the overflow hole.

6. The oil discharge system according to claim 3, Features: The pressure regulating assembly also includes a second spring and a second steel ball. One end of the second spring abuts against the pump body, and the other end fits against the second steel ball. The second steel ball abuts against the adjusting knob to achieve the shifting of the adjusting knob.

7. The oil discharge system according to claim 1, Features: The oil discharge system further comprises a speed reduction assembly, which is connected to the eccentric reciprocating assembly and provides power to the eccentric reciprocating assembly to drive the plunger to reciprocate.

8. The oil discharge system according to claim 1, Features: The oil discharge system also includes a control component, which includes a controller and an alarm. The controller is used to control the alarm to issue a reminder when the pressure in the oil outlet chamber reaches the pressure output by the pressure regulating component, so that the oil injection device stops working and achieves quantitative oil supply.

9. The oil discharge system according to claim 1, Features: The oil discharge system further comprises an oil discharge pipe assembly, which is connected to the pump body and communicates with the oil outlet cavity, so that the gas in the oil storage pipe is discharged through the oil discharge pipe assembly.

10. A grease gun, Features: The grease retaining mechanism comprises a plurality of independently controlled oil pumps, and the independently controlled oil pump of the plurality of independently controlled oil pumps is a plurality of independently controlled oil pumps, and the independently controlled oil pumps are a plurality of independently controlled oil pumps.

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