Low oil level alarm device and electric grease lubrication pump

Abstract

The invention discloses a low-oil-level alarm device and an electric grease lubrication pump. The low-oil-level alarm device and the electric grease lubrication pump have the advantage of being high in low-oil-level detection accuracy. The low-oil-level alarm device comprises an oil pressing plate, a connecting piece, a swinging piece, a reset driving piece, a detected piece and a detection sensor, the oil pressing plate is rotationally arranged in an oil tank, the first end of the connecting piece is connected to the oil pressing plate, the second end of the connecting piece is arranged on one side of the oil pressing plate in a deviated mode by a certain angle, and the swinging piece is hinged to the second end of the connecting piece; the swinging piece comprises a first structure part which is arranged on one side of the connecting piece in an offset mode and a second structure part which is arranged on one side of the connecting piece in an offset mode and arranged above the connecting piece, the detected piece is installed on the first structure part, and the swinging piece is in a first state when the second structure part is close to the side wall of the oil tank; the swinging piece is in a second state when the second structural part is far away from the side wall of the oil tank, the detection sensor is installed on the grating disc, and the second structural part is provided with a first plane and a second plane which are arranged at a certain angle and pushed by grease.

Description

Technical Field

[0001] The 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 lubrication parts. Electric grease lubrication pumps have more advantages and are increasingly favored by the market. In order to prevent grease supply interruption, it is necessary to ensure the uninterrupted output of grease from the electric grease lubrication pump. Therefore, when the grease level in the oil tank is reduced to a preset value, an alarm needs to be sounded in time to notify relevant staff to add grease to the oil tank. There are already low oil level alarm devices that can achieve this function, but the existing low oil level alarm devices often fail to move in place and cause false detection due to unreasonable structural settings.

[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 low oil level detection.

[0006] 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 arranged 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 has a structure, the swinging member is in a first state when the second structure is close to the side wall of the oil tank, and is in a second state when the second structure is away from the side wall of the oil 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 to the second state by the grease on the first plane and the plane. 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 define an angle therebetween.

[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 swingable 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 swingable member is in the second state.

[0012] Preferably, the swingable 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 swingable member is in the first state.

[0013] Preferably, the reset drive member has a drive surface, the curvature radius of the drive surface increases continuously 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, so that the swinging member switches from the second state to the first state.

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

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

[0016] Compared with the prior art, the present invention arranges the first plane and the second plane on 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 not being deflected into place, causing the detected part to face the detection sensor and thereby causing a false alarm, so 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 is along Figure 2 The cross-sectional view obtained after cutting along the AA line segment.

[0020] Figure 4It is a stereoscopic view of the electric grease lubrication pump of the present invention after the pump seat, the drive motor, the plunger pump and the oil tank are hidden, the oil tank is filled with grease, and when 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 at 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 a preset value.

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

[0025] Fig. 9 It is a stereogram of the structure shown in 7 at another angle.

[0026] Fig.10 It is a stereoscopic diagram of the structure shown in 4 when the swinging part passes through the detection sensor and the oil tank is filled with grease.

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

[0028] Fig.12 Fig.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, further description will be given below in combination with the implementation modes 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, including 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, and of course, other devices, which are not listed here one by one. Among them, the drive motor 30, the plunger pump 40, the grille plate 60 and the oil tank 50 are respectively installed on the pump base 20, and the oil tank 50 is provided with an oil storage chamber 51 (for storing grease), and the pump base 20 is provided with an oil suction chamber 21, and the grille plate 60 separates the oil storage chamber 51 and the oil suction chamber 21. The low oil level alarm device 10 is arranged in 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 arranged in the oil tank 50. Specifically, the oil pressure plate 11 is installed at the output end of the driving motor 30. The driving motor 30 drives the oil pressure plate 11 to rotate in the oil storage chamber 51, so that the oil pressure plate 11 presses the grease toward the grille plate 60, and the grease passes through the grille plate 60 and flows into the oil suction chamber 21. The driving motor 30 drives the plunger pump 40 to perform continuous reciprocating oil suction and oil pumping actions to suck in and pump out the grease in the oil suction chamber 21. The first end of the connecting member 12 is connected to the oil pressure plate 11, and the second end of the connecting member 12 is offset at a certain angle to one side of the oil pressure plate 11. The swing member 13 is hinged to the second end of the connecting member 12. The swing member 13 includes a first structural part 131 offset to one side of the connecting member 12 and a second structural part 132 offset to one side of the connecting member 12 and arranged above the connecting member 12. The detected member 15 is installed on the first structural part 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 (this state is as shown in FIG. Figures 7 to 9 As shown in FIG. 1 , 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 The grille plate 60 is disposed at the bottom of the oil tank 50. The detection sensor 16 is installed on the grille plate 60. The second structural part 132 is provided with a first plane 1321 and a second plane 1322 which are arranged at a certain angle and pushed by the grease. The first plane 1321 and the second plane 1322 are respectively 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 to deflect to the first state (the process is referred to in 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 Fig.10 , Fig.11 and Fig.12 ). When the swing member 13 passes the detection sensor 16 in the first state, the detected member 15 faces the detection sensor 16, so that the detection sensor 16 is triggered (refer to Figure 7 , Figure 8 and Fig. 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 member 13 by a certain angle, and the grease pushes the second plane 1322 to deflect the swinging member 13 by a certain angle, so that the swinging member 13 is deflected into place, avoiding the swinging member 13 from being deflected out of place, causing the detected member 15 to face the detection sensor 16 and thus causing a false alarm, so 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 makes the swing member 13 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 pressing plate 11 to rotate in a clockwise direction ( Figure 5 , Figure 8 and Fig.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, and 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. Fig.11 As shown, when the swinging member 13 is in the second state, the second plane 1322 rotates around the oil pressure plate 11 with the connecting member 12 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 swinging 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 swinging member 13 can be most effectively restricted to remain in the second state to ensure its stability.

[0041] like Figures 4 to 12 As shown, the swing member 13 is further provided with a first abutting portion 133 close 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, so that the swing member 13 is stably in the second state. The swing member 13 is further provided with a second abutting portion 134 close 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, so that the swing member 13 is stably in the first state.

[0042] like Figures 4 to 12 As shown, the reset driving member 14 has a driving curved surface 141, and the detected member 15 is roughly cylindrical. When the swing member 13 passes through the reset driving member 14, the lower end of the detected member 15 slides against the driving curved surface 141, so that the swing member 13 switches from the second state to the first state. The sliding of the lower end of the detected member 15 against the driving curved surface 141 drives the swing member 13 to rotate, so that the swing member 13 switches from the second state to the first state. Preferably, along the rotation direction of the oil pressure plate 11 (the direction indicated by the arrow B), the curvature radius of the driving curved surface 141 increases continuously.

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

[0044] The following is a brief description of the working process of the electric grease lubrication pump 100 of the present invention: the drive motor 30 is started, the drive motor 30 drives the oil pressure plate 11 to rotate, the oil pressure plate 11 presses the grease in the oil storage chamber 51 toward the grille plate 60, the grease flows through the grille plate 60 and flows into the oil suction chamber 21, and then the grease flows into the oil inlet of the plunger pump 40. The drive motor 30 drives the cam 31 to rotate, the cam 31 pushes the plunger pump 40 to absorb and pump oil, and the two plunger pumps 40 pump oil intermittently and continuously. The swing member 13 rotates synchronously with the oil pressure plate 11, and the grease pushes the first plane 1321 and the second plane 1322, so that the swing member 13 deflects, and the swing member 13 rotates from the first state to the second state, and the first abutment portion 133 abuts against the connecting member 12. When the swing member 13 passes the detection sensor 16 in the second state, the detected member 15 will not face the detection sensor 16, and the detection sensor 16 will not be triggered, indicating that there is sufficient grease in the oil storage chamber 51. However, when the grease level in the oil storage chamber 51 decreases to below the preset value, there is a lack of grease to push 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 out 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, which cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are all within the scope of the present invention.

Claims

1. A low oil level alarm device, used for an electric grease lubrication pump and arranged in an oil tank, wherein a grille plate is arranged at the bottom of the oil tank, characterized in that: The invention comprises an oil pressure plate, a connecting member, a swinging member, a reset driving member, a detected member and a detection sensor, wherein 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 comprises 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, and the swinging member is in a first state when the second structural part is close to the side wall of the oil tank , the swing member is in the second state when the second structural portion is away from the side wall of the oil tank, the detection sensor is installed on the grille plate, the second structural portion is provided with a first plane and a second plane arranged at a certain angle and pushed by grease, the swing member is driven by the reset driving member to deflect to the first state when passing through the reset driving member, and the swing member is deflected to the second state due to the push of the grease on the first plane and the plane after passing through the reset driving member, and the detected member is opposite to the detection sensor when the swing member passes through the detection sensor in the first state, so that the detection sensor is triggered.

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 swinging 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: The first structure portion and the second structure portion define an angle therebetween.

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 swingable 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 swingable member is in the second state.

7. The low oil level alarm device according to claim 1, characterized in that: The swingable 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 swingable member is in the first state.

8. 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 increases continuously 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, so that the swinging member switches from the second state to the first state.

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

10. An electric grease lubrication pump, characterized in that: It comprises a low oil level alarm device as described in any one of claims 1 to 9.

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