Lubricating pump

Abstract

The utility model provides a lubricating pump. An oil inlet cavity, a containing cavity and an oil outlet cavity are sequentially formed in an oil pipe. A gear rod in the driving rod set is adjacent to the containing cavity, the meshing cylinder stretches across the containing cavity and the oil inlet cavity and is meshed with the gear rod, and the rotating motion of the gear rod drives the rotating motion of the meshing cylinder. The piston rod slides between the oil inlet cavity and the oil outlet cavity and is arranged in the meshing cylinder in a sleeved mode, and a blocking piece arranged in the radial direction of the piston rod can abut against the meshing cylinder, so that closing or opening of grease output is achieved.

Description

Technical Field

[0001] This application relates to the field of lubrication pumps, and more particularly to a lubrication pump. Background Technology

[0002] Traditional lubrication pump designs primarily focus on improving pump efficiency and stability, ensuring precise lubricant delivery under various operating conditions through optimized pump structure and drive mechanisms. Currently, some lubrication pumps control grease output by using plugs to seal the outlet. This method involves placing a removable or rotatable plug at the outlet; when grease output needs to be shut off, the operator manually places the plug at the outlet position to physically block the flow of lubricant. However, because lubrication pumps generate high internal pressure during operation, especially in high-pressure lubrication systems, the plug is prone to deformation, displacement, or even damage under prolonged high pressure, resulting in ineffective sealing and potential grease leakage.

[0003] Therefore, there is a need for a lubricating pump that allows for easy shut-off of grease output. Utility Model Content

[0004] In view of this, it is necessary to provide a lubricating pump that allows for easy shut-off of grease output in order to solve the above problems.

[0005] Embodiments of this application provide a lubrication pump, comprising:

[0006] The oil pipe includes an oil inlet chamber, a receiving chamber and an oil outlet chamber formed sequentially along the axial extension direction of the oil inlet chamber;

[0007] A drive rod assembly includes a gear rod and a meshing cylinder. The gear rod is disposed adjacent to the receiving cavity. One end of the meshing cylinder is disposed in the receiving cavity, and the other end is disposed in the oil inlet cavity. The meshing cylinder is meshed with the gear rod.

[0008] The piston rod slides between the oil inlet chamber and the oil outlet chamber, and the piston rod is sleeved inside the engagement cylinder. A blocking member is formed in the radial direction, and the blocking member can abut against the engagement cylinder.

[0009] In at least one embodiment of this application, the oil pipe has a sliding hole, the sliding hole is disposed adjacent to the receiving cavity, the axis of the sliding hole is perpendicular to the axis of the oil pipe, and the gear rod is disposed in the sliding hole.

[0010] In at least one embodiment of this application, the meshing cylinder includes a support rod and an abutment rod, the support rod is connected to the abutment rod, and the support rod is disposed in the receiving cavity, and the abutment rod is disposed in the oil inlet cavity;

[0011] The support rod is provided with a first gear rack, which is positioned toward the sliding hole.

[0012] The outer circumferential surface of the gear rod is provided with a second gear rack, and the first gear rack meshes with the second gear rack.

[0013] In at least one embodiment of this application, the abutting rod has a first abutting portion and a second abutting portion, the first abutting portion being located at the end of the abutting rod near the support rod, and the second abutting portion being located at the end of the abutting rod away from the support rod, and the first abutting portion being capable of abutting against the blocking member; or,

[0014] The second abutting part can abut against the blocking member.

[0015] In at least one embodiment of this application, the abutting rod is provided with a sliding groove, and the first abutting part is provided at the bottom of the sliding groove.

[0016] In at least one embodiment of this application, the lubrication pump further includes an oil outlet cylinder, one end of which is disposed in the oil outlet chamber, and the other end of which passes through the engagement cylinder and extends into the oil inlet chamber, and the piston rod is disposed in the oil outlet cylinder;

[0017] The outer surface of the piston rod has a first fitting part and a second fitting part, both of which are fitted to the inner wall of the oil outlet cylinder.

[0018] In at least one embodiment of this application, the outer surface of the piston rod further has a conveying groove, which is disposed between the first fitting portion and the second fitting portion, and the conveying groove passes through the first fitting portion and communicates with the oil outlet chamber.

[0019] In at least one embodiment of this application, the piston rod further includes a piston column, which is disposed in the oil inlet chamber and fits against the inner wall of the oil inlet chamber. The piston column is located at the end of the piston rod away from the delivery groove.

[0020] In at least one embodiment of this application, the piston rod is provided with an oil inlet hole.

[0021] In at least one embodiment of this application, the lubrication pump further includes a buffer reset member disposed within the oil inlet chamber.

[0022] The aforementioned lubrication pump features an inlet chamber, a receiving chamber, and an outlet chamber sequentially arranged inside the oil pipe, providing a clear flow path for the lubricating grease. The gear rod in the drive rod assembly is adjacent to the receiving chamber, while the meshing cylinder spans the receiving chamber and the inlet chamber and meshes with the gear rod, driving the rotation of the meshing cylinder through the rotation of the gear rod. The piston rod slides between the inlet and outlet chambers and is fitted inside the meshing cylinder. Its radially arranged blocking element abuts against the meshing cylinder, thereby opening or closing the grease output. This achieves an internal shut-off mechanism, avoiding the risk of external blockage failure under high pressure and improving operational convenience and safety. Attached Figure Description

[0023] Figure 1 This is a cross-sectional schematic diagram of a lubrication pump according to an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the structure of a lubrication pump according to an embodiment of this application.

[0025] Figure 3 This is an exploded view of the structure of a lubrication pump.

[0026] Figure 4 This is a schematic diagram of the cross-section of the oil pipe.

[0027] Figure 5 This is a schematic diagram of the piston rod.

[0028] Explanation of main component symbols

[0029] 100. A lubrication pump; 10. Oil pipe; 11. Oil inlet chamber; 12. Receiving chamber; 13. Oil outlet chamber; 14. Sliding hole; 20. Drive rod assembly; 21. Gear rod; 211. Second gear rack; 22. Engaging cylinder; 221. Support rod; 2211. First gear rack; 222. Abutting rod; 2221. First abutting part; 2222. Second abutting part; 2223. Sliding groove; 30. Piston rod; 31. Blocking member; 32. First contacting part; 33. Second contacting part; 34. Conveying groove; 35. Piston column; 351. Oil inlet hole; 40. Oil outlet cylinder; 50. Buffer reset member. Detailed Implementation

[0030] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0031] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0032] Embodiments of this application provide a lubrication pump, comprising:

[0033] The oil pipe includes an oil inlet chamber, a receiving chamber and an oil outlet chamber formed sequentially along the axial extension direction of the oil inlet chamber;

[0034] A drive rod assembly includes a gear rod and a meshing cylinder. The gear rod is disposed adjacent to the receiving cavity. One end of the meshing cylinder is disposed in the receiving cavity, and the other end is disposed in the oil inlet cavity. The meshing cylinder is meshed with the gear rod.

[0035] The piston rod slides between the oil inlet chamber and the oil outlet chamber, and the piston rod is sleeved inside the engagement cylinder. A blocking member is formed in the radial direction, and the blocking member can abut against the engagement cylinder.

[0036] The aforementioned lubrication pump features an inlet chamber, a receiving chamber, and an outlet chamber sequentially arranged inside the oil pipe, providing a clear flow path for the lubricating grease. The gear rod in the drive rod assembly is adjacent to the receiving chamber, while the meshing cylinder spans the receiving chamber and the inlet chamber and meshes with the gear rod, driving the rotation of the meshing cylinder through the rotation of the gear rod. The piston rod slides between the inlet and outlet chambers and is fitted inside the meshing cylinder. Its radially arranged blocking element abuts against the meshing cylinder, thereby opening or closing the grease output. This achieves an internal shut-off mechanism, avoiding the risk of external blockage failure under high pressure and improving operational convenience and safety.

[0037] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0038] according to Figures 1-5 This application provides a lubrication pump 100, including: an oil pipe 10, a drive rod assembly 20 and a piston rod 30.

[0039] The oil pipe 10 includes an oil inlet chamber 11, a receiving chamber 12 and an oil outlet chamber 13 formed sequentially along the axial extension direction of the oil inlet chamber 11; the drive rod assembly 20 includes a gear rod 21 and a meshing cylinder 22, the gear rod 21 is arranged adjacent to the receiving chamber 12, one end of the meshing cylinder 22 is located in the receiving chamber 12 and the other end is located in the oil inlet chamber 11, and the meshing cylinder 22 is meshed with the gear rod 21; the piston rod 30 slides between the oil inlet chamber 11 and the oil outlet chamber 13, and the piston rod 30 is sleeved in the meshing cylinder 22, and a blocking member 31 is formed in the radial direction, the blocking member 31 being able to abut against the meshing cylinder 22.

[0040] Specifically, the oil pipe 10 is internally divided into an inlet chamber 11, a receiving chamber 12, and an outlet chamber 13, arranged sequentially along the axial direction. This design not only provides a clear path for the flow of lubricating grease but also provides the necessary space for the subsequent installation and movement of the drive rod assembly 20 and the piston rod 30. The drive rod assembly 20 consists of a gear rod 21 and a meshing cylinder 22. The gear rod 21 is adjacent to the receiving chamber 12, while one end of the meshing cylinder 22 extends into the receiving chamber 12, and the other end extends into the inlet chamber 11, meshing with the gear rod 21. This allows the rotational movement of the gear rod 21 to drive the meshing cylinder 22 to rotate circumferentially around the piston rod 30. When the meshing cylinder 22 rotates to a certain position, the piston rod 30 can continue to move axially, thereby driving the piston rod 30 to slide between the inlet chamber 11 and the outlet chamber 13. The piston rod 30 is sleeved inside the engagement cylinder 22 and is provided with a blocking member 31 in the radial direction. The blocking member 31 and the piston rod 30 are an integral structure. The structure of the blocking member 31 can be prismatic, cylindrical, etc.

[0041] When the piston rod 30 moves under the drive of the engagement cylinder 22, the blocking member 31 can abut against the end face of the engagement cylinder 22, thereby changing the flow state of the lubricating grease and realizing the grease output being turned off or on.

[0042] Furthermore, this lubrication pump employs an internal shut-off mechanism, where the grease output is shut off by the contact between the stopper 31 on the piston rod 30 and the engagement cylinder 22. This design avoids the limitations of relying on external plugs for sealing, making the grease output shutdown faster and more reliable. Since the contact between the stopper 31 and the engagement cylinder 22 occurs inside the lubrication pump, it is unaffected by external pressure. Even if high pressure is generated inside the lubrication pump, the stopper 31 can stably maintain contact with the engagement cylinder 22, ensuring no grease leakage. The rotational movement of the drive rod assembly 20 drives the sliding of the piston rod 30, thereby achieving the shut-off or opening of the grease output.

[0043] In summary, when it is necessary to control the output of lubricating grease, the rotation of the drive gear rod 21 causes the rotation of the meshing cylinder 22, which in turn drives the piston rod 30 to slide between the oil inlet chamber 11 and the oil outlet chamber 13. When the blocking member 31 on the piston rod 30 abuts against the meshing cylinder 22, it blocks the grease flow channel between the oil inlet chamber 11 and the oil outlet chamber 13, thereby closing the grease output. Conversely, when the gear rod 21 rotates in the opposite direction, the grease flow channel reopens, and the lubricating grease can be output.

[0044] In one specific embodiment, the oil pipe 10 has a sliding hole 14, which is adjacent to the receiving cavity 12. The axis of the sliding hole 14 is perpendicular to the axis of the oil pipe 10, and the gear rod 21 is disposed in the sliding hole 14.

[0045] Specifically, the sliding hole 14 on the oil pipe 10 is adjacent to the receiving cavity 12, and the axis of the sliding hole 14 is perpendicular to the axis of the oil pipe 10. This allows the gear rod 21 to be installed on the oil pipe 10 in a stable and compact manner, while ensuring smooth meshing between the gear rod 21 and the meshing cylinder 22. The sliding hole 14 not only provides a clear installation position for the gear rod 21 but also restricts its direction of movement, allowing it to move only along the axis of the sliding hole 14. The rotational motion of the gear rod 21 can be directly transmitted to the meshing cylinder 22. When the meshing cylinder 22 rotates to a certain position, the piston rod 30 can continue to move axially, thereby driving the piston rod 30 to perform linear motion.

[0046] Furthermore, during the operation of the lubrication pump, when it is necessary to control the output of lubricating grease, the operator drives the gear rod 21 to rotate via an external drive device (such as a motor, handle, etc.). The gear rod 21 rotates stably within the sliding hole 14 and transmits the rotational motion to the meshing cylinder 22 through its meshing connection with the meshing cylinder 22. Driven by the gear rod 21, the meshing cylinder 22 performs circumferential motion. When the meshing cylinder 22 rotates to a certain position, the piston rod 30 can continue to move in the axial direction, thereby pushing or pulling the piston rod 30 to slide between the oil inlet chamber 11 and the oil outlet chamber 13.

[0047] In one specific embodiment, the meshing cylinder 22 includes a support rod 221 and an abutment rod 222. The support rod 221 is connected to the abutment rod 222, and the support rod 221 is disposed in the receiving cavity 12, while the abutment rod 222 is disposed in the oil inlet cavity 11. The support rod 221 has a first gear rack 2211, which is disposed facing the sliding hole 14. The outer circumferential surface of the gear rod 21 has a second gear rack 211, and the first gear rack 2211 and the second gear rack 211 are meshed together.

[0048] Specifically, the engagement cylinder 22 can simultaneously span the receiving cavity 12 and the oil inlet cavity 11, providing stable support and drive for the linear movement of the piston rod 30. The support rod 221 is located in the receiving cavity 12, providing a stable mounting base for the engagement cylinder 22; the abutment rod 222 is located in the oil inlet cavity 11, and can directly interact with the piston rod 30, providing a moving position for the sliding of the piston rod 30.

[0049] Furthermore, the first rack 2211 and the second rack 211 can directly transmit the rotational motion of the gear rod 21 to the meshing cylinder 22 through the meshing of the racks, thereby converting it into the circumferential motion of the meshing cylinder 22. The arrangement of the first rack 2211 improves the transmission efficiency between the meshing cylinder 22 and the gear rod 21, resulting in a faster response speed and more stable transmission of the lubrication pump. At the same time, the meshing method of the racks also has high transmission accuracy and reliability, helping to reduce energy loss and errors during the transmission process.

[0050] In one specific embodiment, the abutting rod 222 has a first abutting portion 2221 and a second abutting portion 2222. The first abutting portion 2221 is located at one end of the abutting rod 222 near the support rod 221, and the second abutting portion 2222 is located at one end of the abutting rod 222 away from the support rod 221. The first abutting portion 2221 can abut against the blocking member 31; or, the second abutting portion 2222 can abut against the blocking member 31.

[0051] Specifically, the abutment rod 222 is provided with a first abutment part 2221 and abutment part 2222, which provides two possible abutment positions for the blocking member 31 on the piston rod 30, so that the operator can select different abutment positions according to actual needs to realize the grease output closing or opening.

[0052] Furthermore, in Embodiment 1, when the blocking member 31 needs to abut against the first abutting part 2221, if the current blocking member 31 is positioned opposite to the first abutting part 2221, the piston rod 30 is pushed further into the abutting rod 222 until the blocking member 31 abuts against the first abutting part 2221. At this time, the piston rod 30 can push some grease into the oil outlet chamber 13. If the current blocking member 31 is misaligned with the first abutting part 2221, the gear rod 21 is rotated to drive the abutting rod 222 of the meshing cylinder 22 to move circumferentially, so that the blocking member 31 is positioned opposite to the first abutting part 2221. The piston rod 30 is then pushed further into the abutting rod 222 until the blocking member 31 abuts against the first abutting part 2221.

[0053] Example 2: When the blocking member 31 needs to abut against the second abutting part 2222, the piston rod 30 is pushed to slide, causing the blocking member 31 to move away from the first abutting part 2221 and slide towards the second abutting part 2222. When the piston rod 30 drives the blocking member 31 to slide out of the abutting rod 222, the blocking member 31 is still positioned opposite to the first abutting part 2221. Rotating the gear rod 21 drives the abutting rod 222 of the meshing cylinder 22 to move circumferentially, causing the blocking member 31 to be positioned opposite to the second abutting part 2222. At this time, when the piston rod 30 is slid again, the blocking member 31 abuts against the second abutting part 2222, thereby closing the connection between the oil inlet chamber 11 and the oil outlet chamber 13 and shutting off the grease output.

[0054] In one specific embodiment, the abutting rod 222 has a sliding groove 2223, and the first abutting part 2221 is located at the bottom of the sliding groove 2223.

[0055] Specifically, the sliding groove 2223 provides a specific movement path for the blocking member 31 on the piston rod 30. When the piston rod 30 moves under the drive of the engagement cylinder 22, the blocking member 31 can slide along the sliding groove 2223 until it abuts against the first abutment portion 2221 at the bottom of the sliding groove 2223. Guided by the sliding groove 2223, the blocking member 31 can abut against the first abutment portion 2221 more accurately, thereby improving the accuracy and reliability of the lubrication pump control. Positioning the first abutment portion 2221 at the bottom of the sliding groove 2223 ensures that when the blocking member 31 slides along the sliding groove 2223 to its final position, it can stably abut against the first abutment portion 2221.

[0056] In one specific embodiment, the lubrication pump further includes an oil outlet cylinder 40, one end of which is disposed in the oil outlet chamber 13, and the other end passes through the engagement cylinder 22 and extends into the oil inlet chamber 11. The piston rod 30 is disposed in the oil outlet cylinder 40. The outer surface of the piston rod 30 has a first contact portion 32 and a second contact portion 33, both of which are in contact with the inner wall of the oil outlet cylinder 40.

[0057] Specifically, one end of the oil outlet cylinder 40 is located inside the oil outlet chamber 13, and the other end passes through the engagement cylinder 22 and extends into the oil inlet chamber 11, providing a clear movement path for the piston rod 30. The first contact portion 32 and the second contact portion 33 are both located on the outer surface of the piston rod 30 and are in contact with the inner wall of the oil outlet cylinder 40. This design ensures that the piston rod 30 maintains close contact with the oil outlet cylinder 40 during sliding, preventing grease leakage from the gap between the piston rod 30 and the oil outlet cylinder 40.

[0058] In one specific embodiment, the outer surface of the piston rod 30 also has a conveying groove 34, which is disposed between the first fitting part 32 and the second fitting part 33, and the conveying groove 34 passes through the first fitting part 32 and communicates with the oil outlet chamber 13.

[0059] Specifically, the conveying groove 34 stores a portion of the lubricating grease, so that when the piston rod 30 slides between the oil inlet chamber 11 and the oil outlet chamber 13, the lubricating grease can be conveyed to the oil outlet chamber 13 through the conveying groove 34. The conveying groove 34 is located between the first fitting part 32 and the second fitting part 33, and passes through the first fitting part 32. This layout ensures that the conveying groove 34 can effectively convey grease without affecting the tight fit between the piston rod 30 and the inner wall of the oil outlet cylinder 40.

[0060] Furthermore, when the blocking member 31 of the piston rod 30 slides away from the first blocking part, the second engaging part 33 of the piston rod 30 slides out of the inner wall of the engagement cylinder 22, while the first engaging part 32 of the piston rod 30 remains engaged with the inner wall of the engagement cylinder 22. This prevents the piston rod 30 from sliding out of the engagement cylinder 22 excessively, allowing the oil inlet chamber 11 to connect with the conveying groove 34 and the oil outlet chamber 13. This allows the piston rod 30 to repeatedly push and pull, conveying grease to the oil outlet chamber 13. When the blocking member 31 abuts against the second blocking part, the second engaging part 33 abuts against the abutting post of the engagement cylinder 22, thereby blocking the connection between the oil inlet chamber 11 and the oil outlet chamber 13 and shutting off the grease output.

[0061] In one specific embodiment, the piston rod 30 further includes a piston column 35, which is disposed in the oil inlet chamber 11 and fits against the inner wall of the oil inlet chamber 11. The piston column 35 is located at the end of the piston rod 30 away from the delivery groove 34.

[0062] Specifically, the piston rod 35 installed in the oil inlet chamber 11 can push the entire piston rod 30 to slide, through the tight fit between the piston rod 35 and the inner wall of the oil inlet chamber 11.

[0063] In one specific embodiment, the piston rod 35 has an oil inlet hole 351.

[0064] Specifically, the oil inlet hole 351 on the piston rod 35 allows the lubricating grease in the oil inlet chamber 11 to directly enter the interior of the piston rod 35 or the channel between the piston rod 30 and the piston rod 35 through the hole, and then be transported to the parts that need lubrication through the delivery groove 34 when the piston rod 30 slides.

[0065] In one specific embodiment, the lubrication pump further includes a buffer reset member 50, which is disposed within the oil inlet chamber 11.

[0066] Specifically, the buffer reset element 50 is a spring, which provides buffering and reset force during the sliding of the piston rod 30. When the piston rod 30 slides towards the oil outlet chamber 13 under the drive of the engagement cylinder 22, the spring is compressed, absorbing part of the impact force and preventing the piston rod 30 from colliding inside the oil pipe 10. When the piston rod 30 needs to reset, the spring releases the stored elastic potential energy, pushing the piston rod 30 to slide, thereby achieving automatic reset of the piston rod 30.

[0067] Therefore, the aforementioned lubrication pump 100, through its design, sequentially includes an inlet chamber 11, a receiving chamber 12, and an outlet chamber 13 inside the oil pipe 10, providing a clear flow path for lubricating grease. The gear rod 21 in the drive rod assembly 20 is adjacent to the receiving chamber 12, while the meshing cylinder 22 spans the receiving chamber 12 and the inlet chamber 11 and meshes with the gear rod 21, driving the rotation of the meshing cylinder 22 through the rotational motion of the gear rod 21. The piston rod 30 slides between the inlet chamber 11 and the outlet chamber 13 and is fitted inside the meshing cylinder 22. Its radially arranged blocking member 31 abuts against the meshing cylinder 22, thereby enabling the grease output to be turned off or on. This achieves an internal shut-off mechanism, avoiding the risk of external blockage failure under high pressure and improving operational convenience and safety.

[0068] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A lubrication pump characterized by, The lubricating pump comprises: a lubricating pipe, comprising an oil inlet cavity, an accommodating cavity and an oil outlet cavity formed in sequence along an axial extension direction of the oil inlet cavity; a driving rod group, comprising a gear rod and an engaging cylinder, the gear rod is arranged adjacent to the accommodating cavity, one end of the engaging cylinder is arranged in the accommodating cavity, and the other end is arranged in the oil inlet cavity, and the engaging cylinder is connected with the gear rod in meshing mode; a piston rod, sliding between the oil inlet cavity and the oil outlet cavity, and the piston rod is sleeved in the engaging cylinder, and a blocking piece is formed in a radial direction of the piston rod, and the blocking piece can abut against the engaging cylinder.

2. A lubrication pump according to claim 1, characterized in that The lubricating pipe is provided with a sliding hole, the sliding hole is arranged adjacent to the accommodating cavity, an axis of the sliding hole is perpendicular to an axis of the lubricating pipe, and the gear rod is arranged in the sliding hole.

3. A lubrication pump according to claim 2, wherein The engaging cylinder comprises a supporting rod and an abutting rod, the supporting rod is connected with the abutting rod, the supporting rod is arranged in the accommodating cavity, and the abutting rod is arranged in the oil inlet cavity; wherein, the supporting rod is provided with a first gear strip, and the first gear strip is arranged towards the sliding hole; an outer circumferential surface of the gear rod is provided with a second gear strip, and the first gear strip and the second gear strip are connected in meshing mode.

4. A lubrication pump according to claim 3, wherein The abutting rod has a first abutting part and a second abutting part, the first abutting part is located at one end of the abutting rod close to the supporting rod, the second abutting part is located at one end of the abutting rod away from the supporting rod, and the first abutting part can abut against the blocking piece; or, the second abutting part can abut against the blocking piece.

5. A lubrication pump according to claim 4, wherein The abutting rod is provided with a sliding groove, and the first abutting part is arranged at a groove bottom of the sliding groove.

6. A lubrication pump according to claim 1, wherein The lubricating pump further comprises an oil outlet cylinder, one end of the oil outlet cylinder is arranged in the oil outlet cavity, the other end penetrates through the engaging cylinder and extends into the oil inlet cavity, and the piston rod is arranged in the oil outlet cylinder; an outer surface of the piston rod has a first abutting part and a second abutting part, and the first abutting part and the second abutting part are both abutted against an inner wall of the oil outlet cylinder.

7. A lubrication pump according to claim 6, wherein The outer surface of the piston rod further has a conveying groove, the conveying groove is arranged between the first abutting part and the second abutting part, the conveying groove penetrates through the first abutting part, and the conveying groove is in communication with the oil outlet cavity.

8. A lubrication pump according to claim 7, wherein The piston rod further comprises a piston column, the piston column is arranged in the oil inlet cavity and abutted against an inner wall of the oil inlet cavity, and the piston column is located at one end of the piston rod away from the conveying groove.

9. A lubrication pump according to claim 8, wherein The piston column is provided with an oil inlet hole.

10. A lubrication pump according to claim 1, wherein The lubricating pump further comprises a buffer reset piece, and the buffer reset piece is arranged in the oil inlet cavity.

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