Lubricating structure of driving shaft of oil pump

Abstract

The utility model provides a lubricating structure of a driving shaft of an oil pump. Comprising a shell, a driving shaft rotationally installed on the shell, a gap reserved between the driving shaft and the shell, a lubricating oil tank, a connecting pipe, an oil inlet pipe, a sealing piston and a compression spring. The sealing piston divides the lubricating oil tank into a first cavity and a second cavity which are independent from each other, the first cavity and the second cavity alternately change along with the sliding of the sealing piston along the oil inlet pipe, and the acting force applied to the sealing piston by the compression spring can be pressurized on lubricating oil; according to the lubricating structure of the driving shaft of the oil pump, the gap is formed, so that enough lubricating oil can wrap the driving shaft; by arranging the sealing piston and the spring, pressure can be formed on lubricating oil stored in the first cavity, it is ensured that the gap is filled with the lubricating oil, and therefore the driving shaft is fully lubricated.

Description

Technical Field

[0001] The utility model relates to the technical field of internal combustion engines, in particular to a lubrication structure of a driving shaft of an oil pump. Background Art

[0002] The lubrication quality of the drive shaft in the oil pump is directly related to the noise, vibration and wear of the drive shaft during driving. The existing lubrication technology mainly applies lubricating oil on the drive shaft to achieve the lubrication effect.

[0003] However, the existing lubricating oil supply technology has the technical problem that the lubricating oil is not fully spread on the drive shaft and the drive shaft cannot be fully lubricated due to insufficient lubricating oil. This technical problem will cause greater noise, greater vibration and greater wear of the drive shaft.

[0004] Therefore, it is necessary to provide a new lubrication structure for the drive shaft of an oil pump to solve the above technical problems. Utility Model Content

[0005] The technical problem solved by the utility model is to provide a lubricating structure of a drive shaft of an oil pump which can fully spread the lubricating oil on the drive shaft and has sufficient amount of lubricating oil.

[0006] In order to solve the above technical problems, the lubrication structure of the drive shaft of the oil pump provided by the utility model comprises: a housing and a drive shaft rotatably mounted on the housing, and a gap is reserved between the drive shaft and the housing;

[0007] It also includes a lubricating oil tank, a connecting pipe, an oil inlet pipe, a sealing piston and a compression spring; the lubricating oil tank is fixedly connected to the inside of the shell; one end of the oil inlet pipe is located in the lubricating oil tank and the other end of the oil inlet pipe is located outside the shell, and the end of the oil inlet pipe located outside the shell is threadedly sealed and contacted with a threaded cover; the sealing piston is slidably sleeved on the oil inlet pipe, the outer peripheral surface of the sealing piston is in sealing contact with the inner surface of the shell, and the inner peripheral surface of the sealing piston is in sealing contact with the outer surface of the oil inlet pipe; the sealing piston divides the lubricating oil tank into two spaces, a first chamber and a second chamber, which are mutually exclusive, the outlet end of the oil inlet pipe is located in the first chamber, the first chamber is fixedly connected to the lubricating oil tank through the oil inlet pipe, and the second chamber is provided with an air hole for balancing air pressure; one end of the compression spring is fixedly connected to the second chamber, and the other end of the compression spring is fixedly connected to the sealing piston.

[0008] Preferably, a first sealing ring is fixedly connected to the outer circumference of the sealing piston, and a second sealing ring is fixedly connected to the inner circumference of the sealing piston; the first sealing ring is in sealing contact with the inner surface of the lubricating oil tank, and the second sealing ring is in sealing contact with the outer surface of the oil inlet pipe.

[0009] Preferably, a connecting rod is fixedly connected to the sealing piston, one end of the connecting rod passes through the housing and the lubricating oil tank of the second chamber and is fixedly connected to the sealing piston, and the other end of the connecting rod is located outside the housing.

[0010] Preferably, one end of the connecting rod is provided with an external thread, the sealing piston is fixedly connected to a rotating shaft, and the shell is fixedly connected to a threaded sleeve matching the external thread; the external threaded end of the connecting rod is rotatably sleeved on the rotating shaft, the threaded sleeve is slidably sleeved on the connecting rod and when the first chamber reaches its maximum, the threaded sleeve is threadedly sleeved on the external thread.

[0011] Preferably, the external threaded end of the connecting rod is fixedly connected with a connecting sleeve, and a plurality of pairs of roller seats are fixedly connected to the rotating shaft, each pair of roller seats rotatably carries a roller, and the roller is in rolling contact with the inner surface of the connecting sleeve.

[0012] Preferably, a third sealing ring groove is opened on the housing, the third sealing ring groove is embedded in the third sealing ring groove, and the inner circumferential surface of the third sealing ring is in sealing contact with the connecting rod.

[0013] Preferably, a torque handle for increasing the turning force arm is fixedly connected to the connecting rod, and the torque handle is provided with an elliptical through hole for convenient hand gripping.

[0014] Compared with the related art, the lubrication structure of the drive shaft of the oil pump provided by the utility model has the following beneficial effects:

[0015] The utility model provides a lubrication structure for a drive shaft of an oil pump. By setting a gap, enough lubricating oil can wrap the drive shaft. By setting a sealing piston and a spring, pressure can be formed on the lubricating oil stored in a first chamber to ensure that the lubricating oil fills the gap, thereby achieving full lubrication of the drive shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural schematic diagram of a preferred embodiment of the lubrication structure of the drive shaft of the oil pump provided by the utility model;

[0017] Figure 2 It is an enlarged schematic diagram of the A part shown;

[0018] Figure 3 for Figure 1 Schematic diagram of the connection structure of the lubricating oil tank, compression spring, connecting rod and other components shown;

[0019] Figure 4 for Figure 3 An enlarged schematic diagram of part B is shown;

[0020] Figure 5 for Figure 3An enlarged schematic diagram of part C is shown;

[0021] Figure 6 for Figure 3 An enlarged schematic diagram of part D is shown.

[0022] Numbers in the figure: 1, housing; 2, driving shaft; 3, gap; 4, lubricating oil tank; 401, first chamber; 402, second chamber; 5, connecting pipe; 6, oil inlet pipe; 7, sealing piston; 8, compression spring; 9, threaded cover; 10, air hole; 11, first sealing ring; 12, second sealing ring; 13, connecting rod; 1301, external threaded end; 14, rotating shaft; 15, threaded sleeve; 16, connecting sleeve; 17, roller seat; 18, roller; 19, third sealing ring; 20, third sealing ring groove; 21, torque handle; 22, through hole. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0024] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in, Figure 1 A structural schematic diagram of a preferred embodiment of the lubrication structure of the drive shaft of the oil pump provided by the utility model;

[0025] Figure 2 It is an enlarged schematic diagram of the A part shown; Figure 3 for Figure 1 Schematic diagram of the connection structure of the lubricating oil tank, compression spring, connecting rod and other components shown; Figure 4 for Figure 3 An enlarged schematic diagram of part B is shown; Figure 5 for Figure 3 An enlarged schematic diagram of part C is shown; Figure 6 for Figure 3 An enlarged schematic diagram of part D is shown.

[0026] The lubrication structure of the drive shaft 2 of the oil pump includes: a housing 1 and a drive shaft 2 rotatably mounted on the housing 1. The rotational connection between the drive shaft 2 and the housing 1 belongs to the prior art and will not be described in detail here.

[0027] A gap 3 is reserved between the drive shaft 2 and the housing 1. The gap 3 is a suspension space for the lubricating oil flushed onto the drive shaft 2 and is used to accommodate the lubricating oil flushed onto the drive shaft 2 so that the drive shaft 2 is fully surrounded by the lubricating oil and the drive shaft 2 is fully lubricated.

[0028] It also includes a lubricating oil tank 4, a connecting pipe 5, an oil inlet pipe 6, a sealing piston 7 and a compression spring 8; the lubricating oil tank 4 is fixedly connected to the inside of the housing 1 and is used to store lubricating oil. The oil inlet pipe 6 is fixedly connected to the lubricating oil tank 4, one end of the oil inlet pipe 6 is located in the lubricating oil tank 4 and the other end of the oil inlet pipe 6 passes through the housing and is left outside the housing. The end of the oil inlet pipe 6 located outside the housing is threadedly sealed and contacted with a threaded cap 9. The oil inlet pipe 6 is used to add lubricating oil to the lubricating oil tank 4. The threaded cap 9 is opened when adding, and the threaded cap 9 is tightened after adding to prevent the lubricating oil from overflowing from the oil inlet pipe 6 during the pressurization operation. The sealing piston 7 is slidably sleeved on the oil inlet pipe 6, the outer peripheral surface of the sealing piston 7 is in sealing contact with the inner surface of the housing 1, and the inner peripheral surface of the sealing piston 7 is in sealing contact with the outer surface of the oil inlet pipe 6; the sealing piston 7 divides the lubricating oil tank 4 into a first chamber 401 and a second chamber 402, the spaces of the first chamber 401 and the second chamber 402 are independent of each other, and the second chamber 402 is provided with an air hole 10 for balancing the air pressure. As the sealing piston 7 slides along the oil inlet pipe 6 and the air hole 10 cooperates with the air pressure balance, the first chamber 401 and the second chamber 402 are increased and decreased. The first chamber 401 is fixedly connected to the gap 3 through the oil inlet pipe 6, so the first chamber 401, the connecting pipe 5 and the gap 3 are connected to form a closed space. The outlet end of the oil inlet pipe 6 is located in the first chamber 401 to inject lubricating oil into the first chamber 401. The pressure of the compression spring 8 acts on the lubricating oil in the first chamber 401 through the sealing piston 7 , thereby keeping the gap 3 always filled with lubricating oil to fully lubricate the drive shaft 2 .

[0029] As some other implementations of this embodiment, the outer circumference of the sealing piston 7 is fixedly connected with a first sealing ring 11, and the first sealing ring 11 and the inner surface of the lubricating oil tank 4 are sealed by interference contact, thereby achieving sealed contact between the sealing piston 7 and the inner surface of the lubricating oil tank 4, so as to prevent the lubricating oil from overflowing from the gap 3 between the sealing piston 7 and the lubricating oil tank 4 during the pressurization operation; the inner circumference of the sealing piston 7 is fixedly connected with a second sealing ring 12, and the second sealing ring 12 is in sealing contact with the outer surface of the oil inlet pipe 6, so as to prevent the lubricating oil from overflowing from the gap 3 between the sealing piston 7 and the oil inlet pipe 6 during the pressurization operation. By providing the first sealing ring 11 and the second sealing ring 12, the body of the sealing piston 7 can be prevented from being worn out due to friction, and when the wear is serious, only the sealing ring needs to be replaced, which effectively extends the service life of the sealing piston 7.

[0030] As some other implementations of this embodiment, a connecting rod 13 is fixedly connected to the sealing piston 7, one end of the connecting rod 13 penetrates the housing 1 and the lubricating oil tank 4 of the second chamber 402 and is fixedly connected to the sealing piston 7, and the other end of the connecting rod 13 is located outside the housing 1. During the operation of injecting lubricating oil, the connecting rod 13 is held to assist in moving the sealing piston 7 until the first chamber 401 reaches the maximum and is filled with lubricating oil. At this time, an ordinary injection head can also achieve injection, making the operation of injecting lubricating oil easier.

[0031] As some other implementations of this embodiment, one end of the connecting rod 13 is provided with an external thread, the sealing piston 7 is fixedly connected with a rotating shaft 14, and the housing 1 is fixedly connected with a threaded sleeve 15 matching the external thread; the external thread end 1301 of the connecting rod 13 is rotatably sleeved on the rotating shaft 14, the threaded sleeve 15 is slidably sleeved on the connecting rod 13, and when the first chamber 401 reaches the maximum, the threaded sleeve 15 is arranged on the external thread. Before injecting lubricating oil, first pull the connecting rod 13 outward until the threaded sleeve 15 contacts the external thread, then rotate the connecting rod 13 to lock the threaded sleeve 15 with the external thread section of the connecting rod 13, so that the first chamber 401 is adjusted to the position at one time and locked in this position unchanged, which is more convenient and labor-saving to use than adjusting while injecting. After the injection is completed, the connecting rod 13 is rotated in the opposite direction until the threaded sleeve 15 is separated from the external thread, and the threaded sleeve 15 and the connecting rod 13 are restored from the mutually locked state to the relative sliding connection state, and the compression spring 8 smoothly pressurizes the lubricating oil.

[0032] As some other implementations of this embodiment, the external threaded end 1301 of the connecting rod 13 is fixedly connected to the connecting sleeve 16, and a plurality of pairs of roller seats 17 are fixedly connected to the rotating shaft 14. Each pair of roller seats 17 rotatably carries a roller 18. The roller 18 is in rolling contact with the inner surface of the connecting sleeve 16, which can reduce the rotation resistance of the connecting rod 13 and achieve a labor-saving effect.

[0033] As some other implementations of this embodiment, a third sealing ring groove 20 is provided on the housing 1, and the third sealing ring groove 20 is embedded in the third sealing ring groove 20, and the inner circumference of the third sealing ring 19 is in sealing contact with the connecting rod 13. By providing the third sealing ring 19, the sealing performance of the housing 1 can be maintained, and dust is prevented from entering the housing 1 to increase the wear of the drive shaft 2.

[0034] As some other implementations of this embodiment, a torque handle 21 for increasing the turning force arm is fixedly connected to the connecting rod 13. By providing the torque handle 21, the driving force for rotating the connecting rod 13 can be saved. The torque handle 21 is provided with an elliptical through hole 22 for convenient hand gripping. By providing the elliptical through hole 22 for convenient hand gripping, the elliptical through hole 22 is close to the contour of the human palm, and the four fingers and the thumb cooperate to grip the elliptical through hole 22, which can reduce the probability of the hand slipping off the torque handle 21.

[0035] The working principle of the lubrication structure of the drive shaft 2 of the oil pump provided by the utility model is as follows:

[0036] First, the sealing piston 7 separates the lubricating oil tank 4 into a first chamber 401 and a second chamber 402 which are independent of each other. As the sealing piston 7 slides along the oil inlet pipe 6 , the first chamber 401 and the second chamber 402 compress the spring 8 in a changing manner.

[0037] Secondly, the lubricating oil is injected into the first chamber 401 from the oil inlet pipe 6. The injected oil will squeeze the sealing piston 7. During this process, the first chamber 401 is constantly increasing, and the second chamber 402 is constantly decreasing. At the same time, the compression spring 8 is constantly compressed, so the lubricating oil can usually be injected through a high-pressure injection gun. After the injection operation is completed, tighten the threaded cap 9, the inlet end of the oil inlet pipe 6 is sealed, and the rebound force of the compression spring 8 pressurizes the lubricating oil through the sealing piston 7, forcing the lubricating oil from the first chamber 401 through the connecting pipe 5 to fill the gap 3, thereby fully lubricating the drive shaft 2.

[0038] Compared with the related art, the lubrication structure of the drive shaft 2 of the oil pump provided by the utility model has the following beneficial effects:

[0039] The utility model provides a lubrication structure for a drive shaft 2 of an oil pump, which can allow enough lubricating oil to wrap the drive shaft 2 by setting a gap 3; and can form pressure on the lubricating oil stored in the first chamber 401 by setting a sealing piston 7 and a spring to ensure that the lubricating oil fills the gap 3, thereby achieving full lubrication of the drive shaft 2.

[0040] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A lubrication structure for a drive shaft of an oil pump, comprising a housing and a drive shaft rotatably mounted on the housing, characterized in that: A gap is reserved between the driving shaft and the housing; It also includes a lubricating oil tank, a connecting pipe, an oil inlet pipe, a sealing piston and a compression spring; the lubricating oil tank is fixedly connected to the inside of the shell; one end of the oil inlet pipe is located in the lubricating oil tank and the other end of the oil inlet pipe is located outside the shell, and the end of the oil inlet pipe located outside the shell is threadedly sealed and contacted with a threaded cover; the sealing piston is slidably sleeved on the oil inlet pipe, the outer peripheral surface of the sealing piston is in sealing contact with the inner surface of the shell, and the inner peripheral surface of the sealing piston is in sealing contact with the outer surface of the oil inlet pipe; the sealing piston divides the lubricating oil tank into two spaces, a first chamber and a second chamber, which are mutually exclusive, the outlet end of the oil inlet pipe is located in the first chamber, the first chamber is fixedly connected to the lubricating oil tank through the oil inlet pipe, and the second chamber is provided with an air hole for balancing air pressure; one end of the compression spring is fixedly connected to the second chamber, and the other end of the compression spring is fixedly connected to the sealing piston.

2. The lubrication structure of the drive shaft of the oil pump according to claim 1, characterized in that: A first sealing ring is fixedly connected to the outer circumference of the sealing piston, and a second sealing ring is fixedly connected to the inner circumference of the sealing piston; the first sealing ring is in sealing contact with the inner surface of the lubricating oil tank, and the second sealing ring is in sealing contact with the outer surface of the oil inlet pipe.

3. The lubrication structure of the drive shaft of the oil pump according to claim 1, characterized in that: A connecting rod is fixedly connected to the sealing piston, one end of the connecting rod passes through the housing and the lubricating oil tank of the second chamber and is fixedly connected to the sealing piston, and the other end of the connecting rod is located outside the housing.

4. The lubrication structure of the drive shaft of the oil pump according to claim 3, characterized in that: One end of the connecting rod is provided with an external thread, the sealing piston is fixedly connected to a rotating shaft, and the housing is fixedly connected to a threaded sleeve matching the external thread; the external threaded end of the connecting rod is rotatably sleeved on the rotating shaft, the threaded sleeve is slidably sleeved on the connecting rod and when the first chamber reaches its maximum, the threaded sleeve is threadedly sleeved on the external thread.

5. The lubrication structure of the drive shaft of the oil pump according to claim 4, characterized in that: The external threaded end of the connecting rod is fixedly connected with a connecting sleeve, and a plurality of pairs of roller seats are fixedly connected to the rotating shaft. Each pair of roller seats rotatably carries a roller, and the roller is in rolling contact with the inner surface of the connecting sleeve.

6. The lubrication structure of the drive shaft of the oil pump according to claim 3, characterized in that: The housing is provided with a third sealing ring groove, the third sealing ring groove is embedded in the third sealing ring groove, and the inner circumferential surface of the third sealing ring is in sealing contact with the connecting rod.

7. The lubrication structure of the drive shaft of the oil pump according to claim 3, characterized in that: A torque handle for increasing the turning force arm is fixedly connected to the connecting rod, and an elliptical through hole for convenient hand gripping is provided on the torque handle.

Images