Leak-proof oil pump assembly

Abstract

This utility model aims to provide a leak-proof oil pump assembly, which includes a pump body and a locking assembly. The pump body has an oil inlet hole, and the locking assembly includes a locking pin and an oil-stopping sleeve. The locking pin has a first through hole, and the oil-stopping sleeve has a second through hole radially. The oil-stopping sleeve is fitted onto the locking pin so that the second through hole communicates with the first through hole. The locking pin is rotatably mounted in the pump body. When the locking pin is rotated under force, it connects the second through hole with the oil inlet hole or disconnects it. In this way, the locking pin drives the oil-stopping sleeve to rotate, thus opening or closing the oil inlet hole. When the equipment is stopped and stored naturally, the oil-stopping sleeve seals and blocks the oil inlet hole. When the pressure in the oil tank changes due to temperature fluctuations, it can also effectively prevent oil from flowing in the oil circuit and causing leakage.

Description

Technical Field

[0001] This utility model relates to the technical field of oil pumps, and in particular to a leak-proof oil pump assembly. Background Technology

[0002] With the requirements and promotion of zero carbon emissions, the garden tool industry has responded positively, for example, by switching from fuel-powered to pure electric drive, thereby avoiding pollution and other problems caused by traditional energy sources.

[0003] Although fossil fuels can be replaced by electricity, the cooling and lubrication systems of garden tools, which are used to cool and lubricate moving parts such as chainsaws and blades, cannot currently be replaced by other structural solutions. Therefore, the leakage problem of the oil pump in the cooling and lubrication system of garden tools has brought new challenges.

[0004] Specifically, when garden tools are in operation, the oil pump cooling and lubrication system delivers oil to moving parts such as chainsaws and blades to keep them lubricated and prevent damage from friction-induced overheating. However, when garden tools are stopped and stored naturally, thermal expansion and contraction due to ambient temperature causes a pressure difference in the oil tank, leading to oil leakage at the oil system outlet. This not only negatively impacts users but also pollutes the environment. Therefore, to address these issues, the leak-proof oil pump assembly of this application is proposed. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a leak-proof oil pump assembly that can effectively prevent oil pumps from leaking during natural storage.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A leak-proof oil pump assembly includes a pump body with an oil inlet, and further includes:

[0008] A locking assembly includes a locking pin and an oil-stopping sleeve. The locking pin has a first through hole, and the oil-stopping sleeve has a second through hole in its radial direction. The oil-stopping sleeve is fitted onto the locking pin so that the second through hole communicates with the first through hole. The locking pin is rotatably mounted in the pump body. When the locking pin is rotated under force, it causes the second through hole to communicate with the oil inlet or to be misaligned and cut off.

[0009] Optionally, the oil-stopping rubber sleeve has a polygonal hole in its axial direction, and the locking pin is provided with a polyhedron, which is adapted to pass through the polygonal hole.

[0010] Optionally, the locking pin has an annular groove, and the pump body has a locking pin, one end of which extends into the annular groove so that the locking pin is rotatably mounted in the pump body.

[0011] Optionally, a handle is provided at the end of the locking pin away from the oil-stopping rubber sleeve.

[0012] Optionally, the handle is provided with a locking protrusion, and the pump body is provided with a locking step. When the handle is subjected to force to drive the locking column to rotate, the locking step abuts against the locking protrusion.

[0013] Optionally, a rocker arm is provided at the end of the locking pin away from the oil-stopping rubber sleeve.

[0014] Optionally, the pump body is provided with an oil pump chamber and an oil outlet, and the oil pump chamber is connected to the oil outlet and the oil inlet, respectively.

[0015] Optionally, the leak-proof oil pump assembly further includes a pump rod and a guide pin. A recess is provided at one end of the pump rod, and an oblique annular groove is provided on the outer side wall of the pump rod. The pump rod is rotatably mounted on the pump body so that the inner side wall of the recess and the inner side wall of the pump oil chamber form a variable-volume oil storage cavity. The guide pin is disposed on the pump body, and one end of the guide pin is located in the oblique annular groove. When the pump rod is rotated under force, the oil storage cavity is connected to at most one of the oil inlet hole and the oil outlet hole.

[0016] Optionally, a sealing ring is fitted on the pump rod, and the outer wall of the sealing ring abuts against the pump body.

[0017] Optionally, a sealing ring groove is provided on the pump rod, and the sealing ring is located in the sealing ring groove.

[0018] Compared with the prior art, the present invention has at least the following advantages:

[0019] This utility model discloses an anti-leakage oil pump assembly, comprising a pump body and a locking assembly. The pump body has an oil inlet hole. The locking assembly includes a locking pin and an oil-stopping sleeve. The locking pin has a first through hole, and the oil-stopping sleeve has a second through hole radially. The oil-stopping sleeve is fitted onto the locking pin so that the second through hole communicates with the first through hole. The locking pin is rotatably mounted within the pump body. When the locking pin is rotated under force, it either connects the second through hole to the oil inlet hole or disconnects it. Thus, the locking pin drives the oil-stopping sleeve to rotate, allowing the oil inlet hole to open or close. When the equipment is stopped and stored naturally, the oil-stopping sleeve seals and blocks the oil inlet hole. Furthermore, it effectively prevents oil leakage caused by thermal expansion and contraction due to temperature changes within the oil tank. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an anti-leakage oil pump assembly according to one embodiment of the present invention;

[0022] Figure 2 for Figure 1 A cross-sectional schematic diagram of the leak-proof oil pump assembly shown;

[0023] Figure 3 This is a schematic diagram of the locking assembly according to one embodiment of the present invention;

[0024] Figure 4 for Figure 1 A cross-sectional view of the leak-proof oil pump assembly from another angle;

[0025] Figure 5 This is a schematic diagram of the handle according to one embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of an anti-leakage oil pump assembly according to another embodiment of the present invention;

[0027] Figure 7 for Figure 6 A cross-sectional schematic diagram of the leak-proof oil pump assembly shown;

[0028] Figure 8 This is a schematic diagram of the pump rod according to one embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the pump rod according to another embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 10. Leak-proof oil pump assembly; 100. Pump body; 200. Locking assembly; 110. Oil inlet; 210. Locking pin; 220. Oil-stop sleeve; 211. First through hole; 221. Second through hole; 222. Polygonal hole; 212. Polyhedron; 213. Annular groove; 300. Locking pin; 230. Handle; 231. Locking protrusion; 120. Locking step; 240. Rocker arm; 130. Pump oil chamber; 140. Oil outlet; 410. Pump rod; 420. Guide pin; 411. Recess; 412. Inclined ring groove; 430. Sealing ring; 150. Locking groove; 440. Locking ring; 413. Sealing ring groove; 414. Gear. Detailed Implementation

[0032] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model.

[0033] like Figures 1 to 4 As shown, a leak-proof oil pump assembly 10 includes a pump body 100 and a locking assembly 200. The pump body 100 has an oil inlet hole 110. The locking assembly 200 includes a locking pin 210 and an oil-stopping sleeve 220. The locking pin 210 has a first through hole 211, and the oil-stopping sleeve 220 has a second through hole 221 in the radial direction. The oil-stopping sleeve 220 is sleeved on the locking pin 210 so that the second through hole 221 communicates with the first through hole 211. The locking pin 210 is rotatably disposed inside the pump body 100. When the locking pin 210 is rotated under force, the second through hole 221 communicates with the oil inlet hole 110 or is displaced and cut off.

[0034] It should be noted that the pump body 100 has an oil inlet hole 110, and a locking pin 210 is rotatably installed inside the oil inlet hole 110. One end of the locking pin 210 is located inside the oil inlet hole 110, and the other end of the locking pin 210 extends to the outer wall of the pump body 100. Further, a first through hole 211 is radially formed on the end of the locking pin 210 located in the oil inlet hole 110. An oil-stop rubber sleeve 220 is fitted onto the end of the locking pin 210 located in the first through hole 211. A second through hole 221 is radially formed on the oil-stop rubber sleeve 220, and the second through hole 221 communicates with the first through hole 211. It should be noted that a locking groove is formed radially on the pump body 100 along the oil inlet hole 110, so that the locking pin 210 drives the oil-stop rubber sleeve 220 into the locking groove. Thus, when the locking pin 210 rotates under force, it causes the oil-stop sleeve 220 to rotate relative to the pump body 100, thereby connecting or displacing the second through hole 221 of the oil-stop sleeve 220 with the oil inlet hole 110. When the second through hole 221 connects with the oil inlet hole 110, it means that the oil inlet hole 110, the first through hole 211, and the second through hole 221 are sequentially connected to form a channel. When the second through hole 221 displacing from the oil inlet hole 110, the oil inlet hole 110 is blocked by the oil-stop sleeve 220. In this way, when the equipment is stopped and stored naturally, the oil-stop sleeve 220 seals and blocks the oil inlet hole 110, and when the pressure in the oil tank changes due to temperature changes and expands and contracts, it can also effectively prevent oil from flowing in the oil circuit and causing leakage.

[0035] like Figure 3 As shown, in one embodiment, the oil-stopping rubber sleeve 220 has a polygonal hole 222 in its axial direction, and the locking pin 210 is provided with a polyhedron 212, which is adapted to pass through the polygonal hole 222.

[0036] It should be noted that the first through hole 211 is located on the polyhedron 212 and is in a through-hole state. In order to ensure that the locking pin 210 reliably drives the oil-stopping sleeve 220 to rotate relative to the pump body 100 and to prevent the oil-stopping sleeve 220 from rotating relative to the locking pin 210, the locking pin 210 and the oil-stopping sleeve 220 are configured as the above-described fitting structure. In one embodiment, the polyhedron 212 is a tetrahedron, and the polygonal hole 222 is a quadrangular hole, so that the tetrahedron fits through the quadrangular hole. This allows the oil-stopping sleeve 220 to be reliably engaged with the polyhedron 212.

[0037] like Figures 1 to 3 As shown, in one embodiment, the locking pin 210 is provided with an annular groove 213, and the pump body 100 is provided with a locking pin 300. One end of the locking pin 300 extends into the annular groove 213 so that the locking pin 210 is rotatably disposed in the pump body 100.

[0038] It should be noted that, in order to ensure that the locking pin 210 rotates reliably and stably relative to the pump body 100, a locking pin 300 is installed laterally on the pump body 100, such that the end of the locking pin 300 is inserted into the annular groove 213. In this way, the locking pin 210 can be locked in the pump body 100 to rotate stably relative to the pump body 100 without coming off the pump body 100.

[0039] like Figure 1 and Figure 2 As shown, in one embodiment, a handle 230 is provided at the end of the locking pin 210 away from the oil-stopping rubber sleeve 220.

[0040] Thus, by turning the handle 230 to manually rotate the locking pin 210, the oil inlet 110 can be manually opened or closed.

[0041] Furthermore, such as Figure 5 As shown, in one embodiment, a locking protrusion 231 is provided on the handle 230, and a locking step 120 is provided on the pump body 100. When the handle 230 is subjected to force to drive the locking pin 210 to rotate, the locking step 120 abuts against the locking protrusion 231.

[0042] It should be noted that when the second through hole 221 and the oil inlet hole 110 are coaxial, the second through hole 221 and the oil inlet hole 110 are in the maximum communication state. When the axis of the second through hole 221 is perpendicular to the axis of the oil inlet hole 110, the oil stop sleeve 220 is in the most reliable state of cutting off the oil inlet hole 110. In order to enable the user to quickly rotate the locking pin 210 so that the oil inlet hole 110 is in the maximum communication state or the most reliable cut-off state, a locking step 120 is provided to abut and limit the locking protrusion 231.

[0043] like Figure 6 As shown, in one embodiment, a rocker arm 240 is provided at the end of the locking pin 210 away from the oil-stopping rubber sleeve 220.

[0044] It should be noted that the locking pin 210 can be manually rotated via the handle 230, or driven by an electric motor or other electric device. Specifically, one end of the lever 240 is fixedly installed to the locking pin 210, and the output shaft of the electric motor or other electric device is connected to the other end of the lever 240, thus driving the locking pin 210 to rotate. Furthermore, it should be noted that the lever 240 and the handle 230 are not mutually exclusive; they can be installed separately on the locking pin 210, or simultaneously on the locking pin 210.

[0045] like Figure 4 and Figure 7As shown, in one embodiment, the pump body 100 has an oil pump chamber 130 and an oil outlet 140, and the oil pump chamber 130 is connected to the oil outlet 140 and the oil inlet 110 respectively.

[0046] It should be noted that the oil outlet 140 and the oil inlet 110 are located on opposite sides of the oil pump chamber 130. By using the locking pin 210 to drive the oil stop sleeve 220 to open or close the oil inlet 110, the oil can be controlled to enter the oil pump chamber 130 through the oil inlet 110. When the equipment is stopped and stored naturally, leakage of oil along the oil passage connection can be effectively prevented.

[0047] like Figure 4 and Figure 8 As shown, in one embodiment, the anti-leakage oil pump assembly 10 further includes a pump rod 410 and a guide pin 420. A recess 411 is provided on one end of the pump rod 410, and an oblique annular groove 412 is provided on the outer side wall of the pump rod 410. The pump rod 410 is rotatably mounted on the pump body 100 so that the inner side wall of the recess 411 and the inner side wall of the pump oil chamber 130 form a variable volume oil storage chamber. The guide pin 420 is mounted on the pump body 100, and one end of the guide pin 420 is located in the oblique annular groove 412. When the pump rod 410 is rotated under force, the oil storage chamber is connected to at most one of the oil inlet hole 110 and the oil outlet hole 140.

[0048] It should be noted that the inclined annular groove 412 is formed around the outer wall of the pump rod 410, and the inclined annular groove 412 is inclined. Thus, by inserting the guide pin 420 into the inclined annular groove 412 to lock the pump rod 410 in place, when the pump rod 410 is subjected to force to rotate relative to the pump body 100, the pump rod 410 will also slide axially relative to the pump body 100, causing the oil storage cavity formed by the recess 411 and the inner wall of the oil pump chamber 130 to periodically increase and decrease as the pump rod 410 rotates. Furthermore, as the oil storage cavity periodically increases and decreases, it will periodically communicate with the oil inlet hole 110, or with the oil outlet hole 140, or not with either the oil inlet hole 110 or the oil outlet hole 140. Moreover, when the volume of the oil storage cavity increases, the oil storage cavity communicates with the oil inlet hole 110; when the volume of the oil storage cavity decreases, the oil storage cavity communicates with the oil outlet hole 140. This allows the oil to be continuously pumped as the pump rod 410 rotates. Thus, by rotating the oil-stop sleeve 220 via the locking pin 210, the opening or closing of the oil inlet 110 can be controlled, preventing the oil from flowing due to thermal expansion and contraction when the equipment is stopped and stored naturally, effectively avoiding leakage.

[0049] like Figure 4 , Figures 7 to 9 As shown, in one embodiment, a sealing ring 430 is fitted on the pump rod 410, and the outer wall of the sealing ring 430 abuts against the pump body 100.

[0050] It should be noted that, in order to improve the sealing between the pump rod 410 and the pump body 100 and prevent oil from leaking out from the gap between them, a sealing ring 430 is fitted onto the pump rod 410 to eliminate the gap. Further, in one embodiment, to prevent the sealing ring 430 from slipping off the pump rod 410, and to ensure the pump rod 410 is reliably and stably positioned, a retaining groove 150 is formed in the pump body 100. A retaining ring 440 is provided on the inner wall of the retaining groove 150, and the sealing ring 430 is located within the retaining groove 150, such that the retaining ring 440 abuts against the sealing ring 430. Thus, the retaining ring 440 pushes against the sealing ring 430, causing the sealing ring 430 to abut against both the pump rod 410 and the inner wall of the retaining groove 150 for sealing. In this embodiment, the sealing ring 430 is located on the end of the guide pin 420 away from the recess 411.

[0051] Furthermore, such as Figure 4 As shown, in one embodiment, a sealing ring groove 413 is provided on the pump rod 410, and the sealing ring 430 is located in the sealing ring groove 413.

[0052] It should be noted that, in this embodiment, to reduce the machining amount of the pump body 100, a sealing ring groove 413 is formed on the pump rod 410, and the sealing ring groove 413 is located on the end of the guide pin 420 near the recess 411. Thus, the sealing ring 430 is fitted into the sealing ring groove 413, and then the pump rod 410 together with the sealing ring 430 is inserted into the pump body 100. In this embodiment, the sealing ring 430 abuts against both the inner wall of the sealing ring groove 413 and the pump body 100.

[0053] like Figure 1 and Figure 6 As shown, in one embodiment, a gear 414 is provided at the end of the pump rod 410 away from the recess 411. In this way, the motor and other driving components drive the pump rod 410 to rotate through gear meshing, which enables the anti-leakage oil pump assembly 10 to accurately pump oil.

[0054] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. Unless otherwise specifically defined, the installation / fixing / setting mentioned in this utility model can be understood as including, but not limited to, locking and fixing with screws / bolts, welding, or bonding with adhesives, wherein the adhesives used can be commercially available finished products. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A leak-proof oil pump assembly comprising a pump body having an oil inlet hole formed therein, characterized in that, Also includes: A locking assembly includes a locking pin and an oil-stopping sleeve. The locking pin has a first through hole, and the oil-stopping sleeve has a second through hole in its radial direction. The oil-stopping sleeve is fitted onto the locking pin so that the second through hole communicates with the first through hole. The locking pin is rotatably mounted in the pump body. When the locking pin is rotated under force, it causes the second through hole to communicate with the oil inlet or to be misaligned and cut off.

2. The leak-proof pump assembly of claim 1, wherein, The oil-stop rubber sleeve has a polygonal hole in its axial direction, and the locking pin is provided with a polyhedron, which is adapted to pass through the polygonal hole.

3. The leak-proof pump assembly of claim 1, wherein, The locking pin has an annular groove, and the pump body has a locking pin. One end of the locking pin extends into the annular groove so that the locking pin is rotatably mounted in the pump body.

4. The leak-proof oil pump assembly of claim 1, wherein, A handle is provided at the end of the locking pin away from the oil-stopping rubber sleeve.

5. The leak-proof oil pump assembly of claim 4, wherein, The handle is provided with a locking protrusion, and the pump body is provided with a locking step. When the handle is used to apply force to drive the locking column to rotate, the locking step abuts against the locking protrusion.

6. The leak-proof pump assembly of claim 1, wherein, A swing arm is provided at the end of the locking pin away from the oil-stopping rubber sleeve.

7. The leak-proof pump assembly of claim 1, wherein, The pump body has an oil pump chamber and an oil outlet, and the oil pump chamber is connected to the oil outlet and the oil inlet, respectively.

8. The leak-proof pump assembly of claim 7, wherein, The leak-proof oil pump assembly also includes a pump rod and a guide pin. A recess is provided on one end of the pump rod, and an oblique annular groove is provided on the outer side wall of the pump rod. The pump rod is rotatably mounted on the pump body so that the inner side wall of the recess and the inner side wall of the pump oil chamber form a variable volume oil storage cavity. The guide pin is mounted on the pump body, and one end of the guide pin is located in the oblique annular groove. When the pump rod is rotated under force, the oil storage cavity is connected to at most one of the oil inlet hole and the oil outlet hole.

9. The leak-proof pump assembly of claim 8, wherein, A sealing ring is fitted on the pump rod, and the outer wall of the sealing ring abuts against the pump body.

10. The leak-proof pump assembly of claim 9, wherein, The pump rod has a sealing ring groove, and the sealing ring is located in the sealing ring groove.

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