Low oil level alarm device and electric grease lubrication pump

Abstract

The present invention discloses a low oil level alarm device and an electric grease lubrication pump, which have the advantage of high accuracy in low oil level detection. The low oil level alarm device of the present invention includes an oil pressure plate, a connecting member, a swinging member, a reset driving member, a detected member and a detection sensor. The oil pressure plate is rotatably arranged in the oil tank. The first end of the connecting member is connected to the oil pressure plate. The second end of the connecting member is offset at a certain angle to one side of the oil pressure plate. The swinging member is hinged to the second end of the connecting member. The swinging member includes a first structural part offset to one side of the connecting member and a second structural part offset to one side of the connecting member and arranged above the connecting member. The detected member is installed on the first structural part. The swinging member is in a first state when the second structural part is close to the side wall of the oil tank, and is in a second state when the second structural part is away from the side wall of the oil tank. The detection sensor is installed on the grille plate. The second structural part is provided with a first plane and a second plane arranged at a certain angle and pushed by the grease.

Description

Technical Field

[0001] The present invention relates to the field of electric grease lubrication pumps, in particular to a low oil level alarm device and an electric grease lubrication pump. Background Art

[0002] A lubrication pump is a lubrication device used to supply lubricant to lubricated parts. Electric grease lubrication pumps offer numerous advantages and are increasingly popular in the market. To prevent grease supply interruptions, the electric grease pump must ensure uninterrupted grease delivery. Therefore, when the grease level in the tank drops to a preset value, an alarm is activated to notify staff to refill the tank. Low-oil-level alarms exist to achieve this function, but these devices often fail to function properly and may result in false detections.

[0003] Therefore, there is an urgent need for a low oil level alarm device and an electric grease lubrication pump with high low oil level detection accuracy to overcome the above-mentioned defects. Summary of the Invention

[0004] The object of the present invention is to provide a low oil level alarm device with high low oil level detection accuracy.

[0005] Another object of the present invention is to provide an electric grease lubrication pump with high accuracy in detecting low oil levels.

[0006] In order to achieve the above-mentioned purpose, the low oil level alarm device provided by the present invention is used for an electric grease lubrication pump and is arranged in an oil tank. A grid plate is provided at the bottom of the oil tank, including an oil pressure plate, a connecting member, a swinging member, a reset driving member, a detected member and a detection sensor. The oil pressure plate is rotatably arranged in the oil tank. The first end of the connecting member is connected to the oil pressure plate, and the second end of the connecting member is offset at a certain angle to one side of the oil pressure plate. The swinging member is hinged to the second end of the connecting member. The swinging member includes a first structural part offset to one side of the connecting member and a second structural part offset to one side of the connecting member and arranged above the connecting member. The detected member is installed on the first structural part. The grille plate is provided with a first structure, wherein the swinging member is in a first state when the second structure is close to the side wall of the fuel tank, and is in a second state when the second structure is away from the side wall of the fuel tank. The detection sensor is installed on the grille plate. The second structure is provided with a first plane and a second plane which are arranged at a certain angle and pushed by grease. When the swinging member passes through the reset driving member, it is driven by the reset driving member to deflect to the first state. After passing through the reset driving member, the swinging member is pushed by the grease on the first plane and the plane and deflected to the second state. When the swinging member passes through the detection sensor in the first state, the detected member is opposite to the detection sensor, so that the detection sensor is triggered.

[0007] Preferably, when the swing member is in the first state, it leans against the connecting member.

[0008] Preferably, when the swing member is in the second state, it leans against the connecting member.

[0009] Preferably, the first structure portion and the second structure portion form an angle.

[0010] Preferably, the spatial plane of the first plane passes through the rotation center of the oil pressure plate when the swing member is in the first state, and the spatial plane of the second plane passes through the rotation center of the oil pressure plate when the swing member is in the second state.

[0011] Preferably, the swing member is further provided with a first abutting portion close to the first structural portion, and the first abutting portion abuts against the connecting member when the swing member is in the second state.

[0012] Preferably, the swing member is further provided with a second abutting portion close to the second structural portion, and the second abutting portion abuts against the connecting member when the swing member is in the first state.

[0013] Preferably, the reset drive member has a drive surface, the curvature radius of the drive surface continuously increases along the rotation direction of the oil pressure plate, and the detected member is a cylindrical structure. When the swinging member passes through the reset drive member, the detected member slides along the drive surface, causing the swinging member to switch from the second state to the first state.

[0014] Preferably, the reset driving member is a grid structure.

[0015] To achieve the second objective mentioned above, the present invention further provides an electric grease lubrication pump, which includes the above-mentioned low oil level alarm device.

[0016] Compared with the prior art, the present invention sets a first plane and a second plane in the second structural part, and the first plane and the second plane are pushed by grease. The grease pushes the first plane to deflect the swinging part by a certain angle, and the grease pushes the second plane to deflect the swinging part by another certain angle, thereby allowing the swinging part to deflect into place, avoiding the swinging part from being deflected out of place, causing the detected part to face the detection sensor and thereby causing a false alarm, so that the accuracy of low oil level detection can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a perspective view of the electric grease lubrication pump of the present invention.

[0018] Figure 2 It is a top view of the electric grease pump of the present invention.

[0019] Figure 3 It is along Figure 2 The cross-sectional view obtained after cutting along the AA line segment.

[0020] Figure 4This is a three-dimensional view of the electric grease lubrication pump of the present invention after the pump base, drive motor, plunger pump and oil tank are hidden, the oil tank is filled with grease, and the swinging part passes through the resetting drive part.

[0021] Figure 5 yes Figure 4 A top view of the structure shown.

[0022] Figure 6 yes Figure 4 The structure shown is a perspective view from another angle.

[0023] Figure 7 yes Figure 4 The structure shown is a three-dimensional diagram when the swinging part passes the detection sensor and the grease level in the oil tank is less than the preset value.

[0024] Figure 8 yes Figure 7 A top view of the structure shown.

[0025] Figure 9 It is a three-dimensional diagram of the structure shown in 7 at another angle.

[0026] Figure 10 4 is a three-dimensional diagram of the structure when the swinging part passes the detection sensor and the oil tank is filled with grease.

[0027] Figure 11 yes Figure 10 Top view of the structure shown.

[0028] Figure 12 Figure 11 The structure shown is a perspective view from another angle. DETAILED DESCRIPTION

[0029] In order to explain the technical content and structural features of the present invention in detail, the following is a further description in conjunction with the embodiments and the accompanying drawings.

[0030] like Figure 1 、 Figure 2 and Figure 3 As shown, the present invention provides an electric grease lubrication pump 100, comprising a low oil level alarm device 10, a pump base 20, a drive motor 30, a plunger pump 40, an oil tank 50, and a grille plate 60. Of course, other devices are also included, which are not listed here. The drive motor 30, plunger pump 40, grille plate 60, and oil tank 50 are each mounted on the pump base 20. The oil tank 50 has an oil storage chamber 51 (for storing grease), the pump base 20 has an oil suction chamber 21, and the grille plate 60 separates the oil storage chamber 51 from the oil suction chamber 21. The low oil level alarm device 10 is located within the oil tank 50.

[0031] The present invention mainly improves the low oil level alarm device 10, and this part of the structure is described in detail below.

[0032] like Figures 3 to 12 As shown, the low oil level alarm device 10 of the present invention includes an oil pressure plate 11, a connecting member 12, a swing member 13, a reset driving member 14, a detected member 15 and a detection sensor 16.

[0033] The oil pressure plate 11 is rotatably mounted within the oil tank 50. Specifically, it is mounted to the output end of the drive motor 30. The drive motor 30 drives the oil pressure plate 11 to rotate within the oil storage chamber 51, causing the oil pressure plate 11 to press the grease toward the grid plate 60. The grease then flows through the grid plate 60 and into the oil suction chamber 21. The drive motor 30 drives the plunger pump 40 to perform a continuous reciprocating oil suction and pumping action, sucking in and pumping out the grease from the oil suction chamber 21. The first end of the connector 12 is connected to the oil pressure plate 11, and the second end of the connector 12 is offset at a certain angle to one side of the oil pressure plate 11. The swing member 13 is hingedly connected to the second end of the connector 12. The swing member 13 includes a first structural portion 131 offset to one side of the connector 12 and a second structural portion 132 offset to one side of the connector 12 and positioned above the connector 12. The detected component 15 is mounted to the first structural portion 131. When the second structure portion 132 is close to the side wall of the oil tank 50, the swing member 13 is in the first state (the state is as shown in FIG. Figures 7 to 9 As shown), the swing member 13 is in the second state (as shown in FIG. 1 ) when the second structural portion 132 is away from the side wall of the oil tank 50. Figures 10 to 12 As shown). The grille plate 60 is provided at the bottom of the oil tank 50. The detection sensor 16 is mounted on the grille plate 60. The second structural portion 132 comprises a first plane 1321 and a second plane 1322 arranged at a certain angle and pushed by the grease. The first plane 1321 and the second plane 1322 are located on different planes. When the swing member 13 passes through the reset drive member 14, it is driven by the reset drive member 14 and deflected to the first state (this process refers to Figure 4 、 Figure 5 and Figure 6 ), after passing through the reset driving member 14, the swing member 13 is pushed by the grease on the first plane 1321 and the second plane 1322 and deflected to the second state (reference Figure 10 、 Figure 11 and Figure 12 When the swing member 13 passes the detection sensor 16 in the first state, the detection member 15 faces the detection sensor 16, so that the detection sensor 16 is triggered (refer to Figure 7 、 Figure 8 and Figure 9). When the grease stored in the oil storage chamber 51 is sufficient, the swing member 13 will experience the first state and the second state during each rotation of the oil pressure plate 11. However, due to the grease pushing the first plane 1321 and the second plane 1322, the swing member 13 will quickly switch to the second state after passing through the reset drive member 14. In other words, the time that the swing member 13 is in the first state is very short. When the grease level in the oil storage chamber 51 is less than the preset value, there is a lack of grease to push the first plane 1321 and the second plane 1322, and the swing member 13 will not deflect. During each rotation of the oil pressure plate 11, the swing member 13 is always in the first state. When the swing member 13 passes the detection sensor 16 in the first state, the detected member 15 is directly opposite to the detection sensor 16, so that the detection sensor 16 is triggered. After the detection sensor 16 is triggered, it indicates that there is insufficient grease in the oil tank 50.

[0034] The present invention sets a first plane 1321 and a second plane 1322 on the second structural part 132, and the first plane 1321 and the second plane 1322 are pushed by grease. The grease pushes the first plane 1321 to deflect the swinging part 13 by a certain angle. The grease also pushes the second plane 1322 to deflect the swinging part 13 by a certain angle, thereby allowing the swinging part 13 to deflect into place, avoiding the swinging part 13 from being deflected out of place, causing the detected part 15 to face the detection sensor 16 and thus causing a false alarm, so that the accuracy of low oil level detection can be effectively improved.

[0035] In the embodiment provided by the present invention, preferably, the detected member 15 is a magnet and the detection sensor 16 is a magnetic sensor, but this is only an example and is not limited to this type of sensing device.

[0036] Preferably, the angle enclosed by the first plane 1321 and the second plane 1322 is within the range of 90°-180°.

[0037] like Figures 4 to 12 As shown, when the swing member 13 is in the first state, it leans against the connecting member 12 , and when the swing member 13 is in the second state, it leans against the connecting member 12 , which enables the swing member 13 to be stably in the first state and the second state.

[0038] like Figures 4 to 12 As shown, the first structure portion 131 and the second structure portion 132 form an angle therebetween. Preferably, the first structure portion 131 and the second structure portion 132 form an angle of 90° therebetween.

[0039] In the embodiment provided by the present invention, the driving motor 30 drives the oil pressure plate 11 in a clockwise direction ( Figure 5 、 Figure 8 and Figure 11 (in the direction indicated by arrow B).

[0040] like Figure 8 As shown, the spatial plane of the first plane 1321 passes through the rotation center of the oil pressure plate 11 when the swing member 13 is in the first state. The force exerted by the grease on the first plane 1321 is perpendicular to the line between the rotation center of the oil pressure plate 11 and the first plane 1321. At this time, the grease can push the swing member 13 to rotate with maximum efficiency. Figure 11 As shown, when the swing member 13 is in the second state, the swing member 13 and the connecting member 12 rotate around the oil pressure plate 11 as a whole. At this time, the spatial plane of the second plane 1321 passes through the rotation center of the oil pressure plate 11 when the swing member 13 is in the second state. The force applied by the grease on the second plane 1322 is perpendicular to the line between the rotation center of the oil pressure plate and the second plane 1322. At this time, the swing member 13 can be most effectively restricted to remain in the second state, ensuring its stability.

[0041] like Figures 4 to 12 As shown, the swing member 13 further includes a first abutting portion 133 adjacent to the first structural portion 131. When the swing member 13 is in the second state, the first abutting portion 133 abuts against the connecting member 12, thereby stably maintaining the swing member 13 in the second state. The swing member 13 further includes a second abutting portion 134 adjacent to the second structural portion 132. When the swing member 13 is in the first state, the second abutting portion 134 abuts against the connecting member 12, thereby stably maintaining the swing member 13 in the first state.

[0042] like Figures 4 to 12 As shown, the reset driver 14 has a curved driving surface 141. The detected member 15 is generally cylindrical in shape. The lower end of the detected member 15 slides against the curved driving surface 141 as the swing member 13 passes the reset driver 14, causing the swing member 13 to switch from the second state to the first state. The sliding of the lower end of the detected member 15 against the curved driving surface 141 causes the swing member 13 to rotate, switching from the second state to the first state. Preferably, the radius of curvature of the curved driving surface 141 increases continuously along the direction of rotation of the oil pressure plate 11 (the direction indicated by arrow B).

[0043] like Figures 4 to 12 As shown, the reset drive member 14 is a grid structure to reduce the obstruction of grease.

[0044] The following briefly describes the operating process of the electric grease lubrication pump 100 of the present invention: The drive motor 30 is activated, driving the oil pressure plate 11 to rotate. The oil pressure plate 11 presses the grease in the oil reservoir 51 toward the grille plate 60. The grease flows through the grille plate 60 and into the oil suction chamber 21. The grease then flows into the oil inlet of the plunger pump 40. The drive motor 30 rotates the cam 31, which pushes against the plunger pump 40 to absorb and pump oil. The two plunger pumps 40 pump oil intermittently and continuously. The oscillating member 13 rotates synchronously with the oil pressure plate 11. The grease pushes against the first and second flat surfaces 1321 and 1322, causing the oscillating member 13 to deflect. The oscillating member 13 rotates from the first state to the second state, with the first abutment portion 133 abutting the connecting member 12. When the oscillating member 13 passes the detection sensor 16 in the second state, the detected member 15 does not directly face the detection sensor 16, and the detection sensor 16 is not triggered, indicating that there is sufficient grease in the oil reservoir 51. However, when the grease level in the oil storage chamber 51 drops below a preset value, there is a lack of grease to push against the first plane 1321 and the second plane 1322, and the swinging member 13 is always in the first state. When the swinging member 13 passes the detection sensor 16, the detected member 15 is directly opposite to the detection sensor 16, so that the detection sensor 16 is triggered, and the detection sensor 16 sends an alarm signal to remind relevant staff that there is insufficient grease in the oil storage chamber 51.

[0045] The above disclosure is only a preferred embodiment of the present invention and cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are within the scope of the present invention.

Claims

1. A low oil level alarm device for an electric grease lubrication pump and arranged in an oil tank, wherein a grille plate is provided at the bottom of the oil tank, characterized in that: The cam is connected to the oil pump sleeve by the push-pull mechanism, and the cam is connected with the oil pump sleeve by the push-pull mechanism, and the cam is connected with the oil pump sleeve by the push-pull mechanism. The first plane and the second plane are arranged at a fixed angle and pushed by grease. When the swinging member passes through the reset driving member, the swinging member is driven by the reset driving member to deflect to the first state. After passing through the reset driving member, the swinging member is pushed by the grease on the first plane and the second plane and deflected to the second state. When the swinging member passes through the detection sensor in the first state, the detected member is opposite to the detection sensor, so that the detection sensor is triggered; the swinging member is also provided with a first abutting portion close to the first structural portion, and the first abutting portion abuts against the connecting member when the swinging member is in the second state. The swinging member is also provided with a second abutting portion close to the second structural portion, and the second abutting portion abuts against the connecting member when the swinging member is in the first state.

2. The low oil level alarm device according to claim 1, characterized in that: When the swinging member is in the first state, it leans against the connecting member.

3. The low oil level alarm device according to claim 1, characterized in that: When the swing member is in the second state, it leans against the connecting member.

4. The low oil level alarm device according to claim 1, characterized in that: An angle is formed between the first structure portion and the second structure portion.

5. The low oil level alarm device according to claim 1, characterized in that: The spatial plane of the first plane passes through the rotation center of the oil pressure plate when the swing member is in the first state, and the spatial plane of the second plane passes through the rotation center of the oil pressure plate when the swing member is in the second state.

6. The low oil level alarm device according to claim 1, characterized in that: The reset driving member has a driving curved surface, the curvature radius of which continuously increases along the rotation direction of the oil pressure plate. The detected member is a cylindrical structure. When the swinging member passes through the reset driving member, the detected member slides along the driving curved surface, causing the swinging member to switch from the second state to the first state.

7. The low oil level alarm device according to claim 1, characterized in that: The reset driving member is a grid structure.

8. An electric grease lubrication pump, characterized in that: It comprises the low oil level alarm device according to any one of claims 1 to 7.

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