Intermittent gear mechanism and its lubrication method

Abstract

The present invention relates to an intermittent gear mechanism and a lubrication method, which includes a gear shaft and a gear. An oil storage boss is provided on the outer wall of the gear shaft. An oil storage cavity is arranged inside the oil storage boss, and an oil injection pipe is provided at the top of the oil storage boss; an oil suction hole is arranged on the top surface of the oil storage boss, and a fixed sealing block and a movable sealing block are arranged inside the oil suction hole. The fixed sealing block is fixedly arranged inside the oil suction hole. There is an oil storage channel between the fixed sealing block and the movable sealing block. One end of the movable sealing block away from the fixed sealing block is connected with an elastic member. The top of the oil storage channel is communicated with the oil storage cavity through a first oil passage, and the top of the oil storage channel is communicated with the oil injection pipe through a second oil passage. A one-way oil passing structure is arranged on the second oil passage or the oil injection pipe. In view of the operation characteristics of the intermittent gear mechanism, the present invention lubricates at the initial stage of each operation of the gear, without the need for continuous lubrication, and the amount of lubricating oil added each time is kept consistent, saving lubricating oil while ensuring the lubrication effect and without reducing the strength of the gear.

Description

Technical Field

[0001] The present invention belongs to the field of gears, and in particular, to an intermittent gear mechanism and a lubrication method thereof. Background Art

[0002] Gears are very common transmission components. An intermittent gear mechanism is a gear mechanism that operates intermittently, stops for a period of time after running for a period of time, and then continues to run. For example, the gear mechanisms used in components such as automotive speed reducers and transmissions.

[0003] In order to ensure the healthy operation of gears, it is necessary to lubricate the gears sufficiently. In order to simplify the lubrication structure, many gear self-lubrication structures have emerged at present. For example, an oil storage cavity and oil channels are provided inside the gear. By using the centrifugal force generated when the gear rotates, the oil in the oil storage cavity automatically flows through the oil channels to the tooth surface. Specifically, reference can be made to CN203962923U - A Centrifugal Lubrication Gear, CN104279296A - A Gear Facilitating Lubrication, CN1079281A - Centrifugal Lubrication Method, CN111853206A - A Gear Transmission Shaft Facilitating Lubrication, etc. These gear structures can lubricate automatically when the gears are running, but the lubrication will not stop automatically before the gears stop rotating, resulting in over-lubrication and wasting lubricating oil. CN112228528A discloses an adjustable automatic lubrication gear, the internal structure of which is very complex, the processing difficulty is very high, and the strength of the gear is reduced. CN217653210U discloses a lubrication structure for a gear shaft. When the rotational speed of the gear shaft is different, the generated heat is also different. The heat is transferred to the airbag to cause the air to expand, and then the oil channel is opened to perform lubrication. The greater the rotational speed of the gear shaft, the greater the generated heat, the greater the expansion amount of the airbag, and the greater the discharge amount of the lubricating oil. Therefore, the supply amount of the lubricating oil can be automatically adjusted according to the change in the rotational speed. However, due to the time required for heat transfer, when the rotational speed of the gear shaft increases, the airbag cannot increase immediately; when the rotational speed of the gear shaft decreases, the heat of the airbag cannot be dissipated quickly. Therefore, the adjustment sensitivity is very low. CN217177135U discloses a convenient lubrication automotive gear shaft. Under the action of centrifugal force, the sealing block will move in a direction away from the oil storage tank, and the limiting rod will move together with it, while the spring is compressed at the same time until the sealing block disengages from the sealing of the outlet pipe port. At this time, the lubricating oil previously stored inside the oil storage tank will flow out through the outlet pipe, and then gradually penetrate into the outer wall of the gear through the diversion groove to lubricate the corresponding transmission parts. In a non-working state, the sealing block will re-seal the port of the outlet pipe under the restoring force of the spring, so that it is convenient to continuously lubricate the transmission parts on the outer wall of the gear in actual operation, and the lubrication effect lasts longer. The above-mentioned existing technologies all continuously lubricate in the running state of the gear or the gear shaft. In fact, only periodic lubrication can meet the requirements. Therefore, the above-mentioned existing technologies have problems such as large fuel consumption and over-lubrication.

[0004] In addition, CN204459068U discloses a self-lubricating gear which uses the principle that when the gear is insufficiently lubricated, it will heat up, causing the internal gas to expand due to heat, increasing the oil pressure, and thus squeezing out the lubricating oil for automatic lubrication. Since it takes a certain amount of time for the filled gas to heat up and expand, the gear needs to run for a period of time under insufficient lubrication before it can be lubricated, and there may be a problem that the lubrication is not timely enough, resulting in damage to the tooth surface. In addition, this self-lubricating gear also has the problem of reducing the tooth surface strength. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an intermittent gear mechanism and its lubrication method. According to the operating characteristics of the intermittent gear mechanism, lubrication is carried out at the initial stage of each operation of the gear, without the need for continuous lubrication, and the amount of lubricating oil added each time remains the same, ensuring the lubrication effect while saving lubricating oil and not reducing the strength of the gear.

[0006] To solve the above problems, the technical solution adopted by the present invention is: an intermittent gear mechanism, including a gear shaft and a gear arranged on the gear shaft. At least one oil storage boss is arranged on the outer wall of the gear shaft, and an oil storage cavity is arranged in the oil storage boss.

[0007] An oil injection pipe is arranged at the top of the oil storage boss, and the outlet end of the oil injection pipe faces the tooth root of the gear.

[0008] A radially extending oil suction hole is arranged on the top surface of the oil storage boss. A fixed seal block and a movable seal block are sequentially arranged in the oil suction hole from outside to inside. The movable seal block is slidably matched with the oil suction hole. The fixed seal block is fixedly arranged in the oil suction hole. There is an oil storage channel between the fixed seal block and the movable seal block. One end of the movable seal block away from the fixed seal block is installed in the oil suction hole through an elastic member. The top of the oil storage channel is communicated with the oil storage cavity through a first oil channel, and the top of the oil storage channel is communicated with the oil injection pipe through a second oil channel. A one-way oil passing structure is arranged on the second oil channel or the oil injection pipe.

[0009] Further, a one-way air inlet channel communicating the oil storage cavity with the outside is arranged at the bottom of the oil storage cavity, and a piston slidably matched with the inner wall of the oil storage cavity is arranged inside the oil storage cavity.

[0010] Further, a supplementary oil channel communicating the oil storage cavity with the outside is arranged at the top of the oil storage cavity, and a detachable plug is arranged at the outer port of the supplementary oil channel; a detachable one-way valve is arranged at the outer port of the one-way air inlet channel.

[0011] Further, the fixed seal block is connected with a positioning column through a connecting column, and the positioning column is threadedly connected with the oil suction hole.

[0012] Further, the oil suction hole is a blind hole and is arranged on the side close to the gear.

[0013] The lubrication method of the intermittent gear mechanism includes

[0014] When the gear shaft rotates, the movable sealing block slides along the oil storage channel under the action of centrifugal force until the movable sealing block contacts the fixed sealing block. At this time, the elastic member elongates, and the movable sealing block closes the first oil passage and the second oil passage;

[0015] When the gear shaft stops rotating, the elastic member pulls the movable sealing block to reset, the first oil passage and the second oil passage are released from being closed, and a negative pressure is generated in the oil storage channel, sucking the lubricating oil in the oil storage cavity into the oil storage channel through the first oil passage;

[0016] When the gear shaft rotates again, the movable sealing block slides along the oil storage channel under the action of centrifugal force, pressing the lubricating oil in the oil storage channel into the second oil passage. The lubricating oil passes through the second oil passage and the injection pipe and then sprays towards the root of the gear. When the movable sealing block contacts the fixed sealing block, the first oil passage and the second oil passage are closed.

[0017] Further, a one-way air intake channel communicating the oil storage cavity with the outside is arranged at the bottom of the oil storage cavity, and a piston slidably matched with the inner wall of the oil storage cavity is arranged inside the oil storage cavity;

[0018] The lubricating oil is stored between the piston and the top of the oil storage cavity. When the lubricating oil in the oil storage cavity is sucked into the oil storage channel through the first oil passage, the piston slides towards the top of the oil storage cavity, and the outside air enters between the piston and the bottom of the oil storage cavity through the one-way air intake channel;

[0019] When the gear shaft rotates again, the piston is subjected to centrifugal force, pushing the lubricating oil into the oil storage channel through the first oil passage until the movable sealing block closes the first oil passage and the second oil passage.

[0020] Further, a supplementary oil channel communicating the oil storage cavity with the outside is arranged at the top of the oil storage cavity, and a detachable plug is arranged at the outer port of the supplementary oil channel; a one-way air outlet channel communicating the oil storage cavity with the outside is arranged at the bottom of the oil storage cavity;

[0021] When the lubricating oil in the oil storage cavity is exhausted, remove the plug and the one-way valve, connect the supplementary oil channel with the lubricating oil storage container, and pump air through the one-way air intake channel to drive the piston to slide towards the bottom of the oil storage cavity, sucking the lubricating oil in the lubricating oil storage container into the oil storage cavity.

[0022] The beneficial effects of the present invention are as follows: 1. A oil storage boss dedicated to supplying lubricating oil to the gear is arranged on the gear shaft, and there is no need to arrange a lubrication structure inside the gear, which will not affect the strength of the gear.

[0023] 2. Lubricating the gears at the initial stage of each rotation can ensure the lubrication effect within one rotation cycle of the gears. After lubrication, the movable sealing block seals the first oil passage and the second oil passage, and continuous lubrication is not carried out, which can slow down the consumption speed of the lubricating oil, reduce the frequency of adding lubricating oil, and thus make the later maintenance more convenient and the cost lower.

[0024] 3. Using the oil storage passage as the transfer space for the lubricating oil, the amount of lubricating oil consumed each time for lubrication is basically the same, and the lubrication effect is kept uniform; and since the volume of the oil storage passage is controllable, the oil consumption is controllable, which is conducive to accurately grasping the amount of lubricating oil used and facilitating the timely addition of lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the front sectional view schematic diagram of the present invention;

[0026] Figure 2 is Figure 1 the enlarged schematic diagram of part A in

[0027] Figure 3 is Figure 1 the right view schematic diagram of

[0028] Reference numerals: 1 - gear shaft; 2 - gear; 3 - oil storage boss; 4 - oil storage cavity; 5 - one-way air intake passage; 6 - oil replenishing passage; 7 - plug; 8 - piston; 9 - oil suction hole; 10 - fixed sealing block; 11 - movable sealing block; 12 - elastic member; 13 - oil storage passage; 14 - first oil passage; 15 - second oil passage; 16 - oil injection pipe; 17 - one-way oil passing structure; 18 - connecting column; 19 - positioning column; 20 - one-way valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The present invention will be further described below with reference to the drawings and embodiments.

[0030] Since the intermittent gear mechanism stops for a period of time after running for a period of time, it is only necessary to add lubricating oil before each movement or at the initial stage of each movement to ensure sufficient lubrication, and continuous lubrication is not required to save lubricating oil, and this lubrication method cannot be achieved by the prior art.

[0031] The intermittent gear mechanism of the present invention, such as Figure 1 , Figure 2 and Figure 3As shown, it includes a gear shaft 1 and a gear 2 arranged on the gear shaft 1. At least one oil storage boss 3 is arranged on the outer wall of the gear shaft 1. An oil storage cavity 4 is arranged in the oil storage boss 3 for storing lubricating oil. A lubricating oil injection pipe 16 is arranged at the top of the oil storage boss 3, and the outlet end of the lubricating oil injection pipe 16 faces the tooth root of the gear 2. The lubricating oil injection pipe 16 is used to transport the lubricating oil to the tooth root of the gear 2. As the gear 2 rotates, the lubricating oil will flow to the tooth surface of the gear 2, thus playing a lubricating role. The oil storage boss 3 is arranged at a position close to the gear 2 to facilitate lubrication of the gear 2.

[0032] The oil storage boss 3 can be fixed on the gear shaft 1 by means of welding, key connection, screw connection, etc., and is used to store lubricating oil and spray the lubricating oil onto the outer wall of the gear 2, thereby lubricating the gear 2. In the present invention, the top of the oil storage boss 3 is the end far from the gear shaft 1, and the bottom of the oil storage boss 3 is the end close to the gear shaft 1.

[0033] A radially extending oil suction hole 9 is arranged on the top surface of the oil storage boss 3. A fixed sealing block 10 and a movable sealing block 11 are sequentially arranged in the oil suction hole 9 from outside to inside. The movable sealing block 11 is in sliding fit with the oil suction hole 9. The fixed sealing block 10 is fixedly arranged in the oil suction hole 9. There is an oil storage channel 13 between the fixed sealing block 10 and the movable sealing block 11. One end of the movable sealing block 11 far from the fixed sealing block 10 is installed in the oil suction hole 9 through an elastic member 12. The top of the oil storage channel 13 is communicated with the oil storage cavity 4 through a first oil passage 14, and the top of the oil storage channel 13 is communicated with the lubricating oil injection pipe 16 through a second oil passage 15. A one-way oil passage structure 17 is arranged on the second oil passage 15 or the lubricating oil injection pipe 16. The one-way oil passage structure 17 can be a one-way valve, and the conduction direction of the one-way oil passage structure 17 is from the oil storage channel 13 to the outside.

[0034] The fixed sealing block 10 and the movable sealing block 11 are made of cylindrical metal blocks. The movable sealing block 11 is in sliding fit with the inner wall of the oil suction hole 9, so that the movable sealing block 11 can slide in the oil suction hole 9. When the gear shaft 1 rotates, the movable sealing block 11 is subjected to centrifugal force and thus moves towards the fixed sealing block 10; the fixed sealing block 10 is in sealing fit with the oil suction hole 9. After installation, the position of the fixed sealing block 10 remains fixed. In order to improve the sealing performance between the fixed sealing block 10 and the side wall of the oil suction hole 9, a sealing ring can be arranged on the outer wall of the fixed sealing block 10.

[0035] The oil storage channel 13 between the fixed sealing block 10 and the movable sealing block 11 is used for the transfer of lubricating oil. The volume of the oil storage channel 13 determines the amount of lubricating oil used each time. Therefore, the size of the oil storage channel 13 is designed according to the lubrication requirements. The elastic member 12 can be a spring, which can be repeatedly stretched and retracted, and is used to drive the movable sealing block 11 to reset. The first oil passage 14 is used to transport the lubricating oil in the oil storage cavity 4 to the oil storage channel 13, the second oil passage 15 is used to transport the lubricating oil in the oil storage channel 13 to the injection oil pipe 16, and the one-way oil passage structure 17 is used to prevent the lubricating oil or the outside air from flowing back into the oil storage channel 13. The connection ports of the first oil passage 14 and the second oil passage 15 with the oil storage channel 13 are both arranged at the top of the oil storage channel 13, so as to realize that when the movable sealing block 11 moves to the top of the oil storage channel 13, the first oil passage 14 and the second oil passage 15 can be closed, thereby stopping lubrication.

[0036] The lubrication method of the present invention is as follows:

[0037] During the initial operation, there is no lubricating oil in the oil storage channel 13, but air. When the gear shaft 1 rotates, the movable sealing block 11 slides along the oil storage channel 13 under the action of centrifugal force, and the air in the oil storage channel 13 is squeezed out through the second oil passage 15; when the movable sealing block 11 contacts the fixed sealing block 10, the movable sealing block 11 closes the first oil passage 14 and the second oil passage 15 to prevent the lubricating oil in the oil storage cavity 4 from flowing along the first oil passage 14 to the oil storage channel 13. During this process, the elastic member 12 stretches and remains in the stretched state.

[0038] When the gear shaft 1 stops rotating, the centrifugal force acting on the movable sealing block 11 disappears. The elastic member 12 pulls the movable sealing block 11 to reset under the action of elastic force. When the movable sealing block 11 leaves the ports of the first oil passage 14 and the second oil passage 15, the first oil passage 14 and the second oil passage 15 are released from being closed, and a negative pressure is generated in the oil storage channel 13. Since the one-way oil passage structure 17 is arranged on the second oil passage 15, the outside air cannot enter the oil storage channel 13 through the second oil passage 15. Therefore, the lubricating oil in the oil storage cavity 4 can be sucked into the oil storage channel 13 through the first oil passage 14, realizing the quantitative transfer of the lubricating oil.

[0039] When the gear shaft 1 rotates again, the movable sealing block 11 slides along the oil storage channel 13 under the action of centrifugal force. Since there is lubricating oil in the oil storage channel 13, the movable sealing block 11 applies pressure to the lubricating oil, thereby pressing the lubricating oil in the oil storage channel 13 into the second oil passage 15. The lubricating oil is sprayed onto the root of the gear 2 after passing through the second oil passage 15 and the injection oil pipe 16. As the gear 2 rotates, the lubricating oil flows to the tooth surface to complete lubrication. When the movable sealing block 11 contacts the fixed sealing block 10, all the lubricating oil in the oil storage channel 13 is squeezed into the second oil passage 15, and the movable sealing block 11 closes the first oil passage 14 and the second oil passage 15 to stop lubrication.

[0040] Since the gear 2 needs to bear a large load during transmission, it requires high strength. If an automatic lubrication structure is provided inside the gear 2, it will affect the strength of the gear 2. In the present invention, an independent oil storage boss 3 is provided on the gear shaft 1, and the oil storage boss 3 is used to lubricate the gear 2 automatically, without the need to provide an automatic lubrication structure inside the gear, reducing the structural complexity and processing difficulty of the gear, and also ensuring the strength of the gear 2.

[0041] In addition, the present invention lubricates the gear 2 at the beginning of each rotation of the intermittent motion gear mechanism, which can ensure the lubrication effect of the gear 2 within one rotation cycle. After lubrication, the movable sealing block 11 closes the first oil passage 14 and the second oil passage 15, and continuous lubrication is not carried out, which can slow down the consumption speed of the lubricating oil, reduce the frequency of adding lubricating oil, and thus make the later maintenance more convenient and the cost lower.

[0042] In addition, the oil storage passage 13 is used as the transfer space for the lubricating oil. The volume of the oil storage passage 13 is fixed, and the amount of lubricating oil consumed each time for lubrication is basically the same, and the lubrication effect is kept uniform; and since the volume of the oil storage passage 13 is controllable, the oil consumption is controllable, which is beneficial to accurately master the amount of lubricating oil used for each lubrication and the total amount of lubricating oil, so as to facilitate timely addition of lubricating oil.

[0043] The oil storage boss 3 can be one. As a preferred embodiment, the oil storage boss 3 is two, three or four, etc., and multiple oil storage bosses 3 are evenly distributed around the gear shaft 1, which can lubricate multiple positions of the gear 2 at the same time, and the even distribution of multiple oil storage bosses 3 can make the center of gravity of multiple oil storage bosses 3 located at the center of the gear shaft 1, preventing the occurrence of eccentric force during rotation.

[0044] In order to prevent the lubricating oil in the oil storage passage 13 from flowing back into the oil storage cavity 4 in the reverse direction, a one-way valve can be provided on the first oil passage 14. As a preferred embodiment: a one-way air intake passage 5 communicating the oil storage cavity 4 with the outside is provided at the bottom of the oil storage cavity 4, and a piston 8 slidably engaged with the inner wall of the oil storage cavity 4 is provided inside the oil storage cavity 4. The one-way air intake passage 5, that is, the outside air can enter the bottom of the oil storage cavity 4 through the one-way air intake passage 5, and the air at the bottom of the oil storage cavity 4 cannot be discharged from the one-way air intake passage 5, which can be achieved by setting a one-way valve.

[0045] Since the oil storage boss 3 rotates with the gear shaft 1, after the gear shaft 1 stops rotating, the top of the oil storage boss 3 may face upward or downward, and the lubricating oil in the oil storage cavity 4 will always be located at the lower part of the oil storage cavity 4 under the action of gravity (the lower part of the oil storage cavity 4 is not the bottom of the oil storage cavity 4. When the oil storage boss 3 is above the gear shaft 1, the lower part of the oil storage cavity 4 is the bottom of the oil storage cavity 4. When the oil storage boss 3 is below the gear shaft 1, the lower part of the oil storage cavity 4 is the top of the oil storage cavity 4), which may cause the lubricating oil to be separated from the first oil passage 14, so that the lubricating oil cannot be sucked into the first oil passage 14. After the piston 8 is provided in the present invention, the lubricating oil is stored between the piston 8 and the top of the oil storage cavity 4, and an air cavity is formed between the piston 8 and the bottom of the oil storage cavity 4. When the lubricating oil in the oil storage cavity 4 is sucked into the oil storage passage 13 through the first oil passage 14, a negative pressure is generated between the piston 8 and the oil storage cavity 4, thereby attracting the piston 8 to slide towards the top of the oil storage cavity 4, and the volume of the cavity between the piston 8 and the top of the oil storage cavity 4 decreases, so that the lubricating oil always fills the cavity between the piston 8 and the top of the oil storage cavity 4. No matter what orientation the oil storage boss 3 is in, the lubricating oil can be sucked into the first oil passage 14. When the piston 8 moves, a negative pressure is generated between the piston 8 and the bottom of the oil storage cavity 4, and the outside air enters between the piston 8 and the bottom of the oil storage cavity 4 through the one-way air intake passage 5, ensuring that the piston 8 can slide automatically.

[0046] When the gear shaft 1 rotates again, the piston 8 is also subjected to centrifugal force, and the centrifugal force of the piston 8 will be transmitted to the lubricating oil, thereby pushing the lubricating oil to enter the oil storage passage 13 through the first oil passage 14, increasing the amount of lubricating oil for each lubrication. Of course, the lubricating oil itself also has a certain centrifugal force. When the movable seal block 11 closes the first oil passage 14 and the second oil passage 15, the lubrication can be stopped.

[0047] In order to improve the sealing performance between the piston 8 and the side wall of the oil storage cavity 4, a sealing ring can be provided on the outer wall of the piston 8.

[0048] In order to facilitate the replenishment of lubricating oil to the oil storage cavity 4, a refueling passage 6 communicating the oil storage cavity 4 with the outside is provided at the top of the oil storage cavity 4, and a detachable plug 7 is provided at the outer port of the refueling passage 6; a detachable one-way valve 20 is provided at the outer port of the one-way air intake passage 5. The plug 7 can be connected to the refueling passage 6 by a thread, and the one-way valve 20 can also be threadedly connected to the one-way air intake passage 5.

[0049] When the lubricating oil in the oil storage cavity 4 is exhausted, the plug 7 and the one-way valve 20 are removed, the refueling passage 6 is connected to the lubricating oil storage container, and air is pumped through the one-way air intake passage 5. A negative pressure is generated between the piston 8 and the bottom of the oil storage cavity 4, driving the piston 8 to slide towards the bottom of the oil storage cavity 4, thereby generating a negative pressure between the piston 8 and the top of the oil storage cavity 4, and sucking the lubricating oil in the lubricating oil storage container into the oil storage cavity 4. After refueling is completed, the plug 7 and the one-way valve 20 are reinstalled.

[0050] Both the intake and exhaust use a one-way intake channel 5, eliminating the need to set up an exhaust channel, which simplifies the structure.

[0051] The fixed sealing block 10 is connected with a positioning column 19 through a connecting column 18, and the positioning column 19 is threadedly connected to the oil suction hole 9. When installing the fixed sealing block 10, insert the fixed sealing block 10 into the oil suction hole 9. When the positioning column 19 enters the orifice of the oil suction hole 9, rotate the positioning column 19 to make the positioning column 19 threadedly connected to the oil suction hole 9. Stop rotating the positioning column 19 after the fixed sealing block 10 reaches the target position, and the fixed sealing block 10 can be kept fixed. With this installation method, not only is the disassembly and assembly convenient, but also the volume of the oil storage channel 13 can be adjusted within a certain range, thereby adjusting the oil consumption for each lubrication.

[0052] The oil suction hole 9 is a blind hole and is arranged on the side close to the gear 2. Both the first oil passage 14 and the second oil passage 15 are inclined, shortening the flow path of the lubricating oil.

[0053] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Intermittent gear mechanism, including a gear shaft (1) and a gear (2) arranged on the gear shaft (1), at least one oil storage boss (3) is arranged on the outer wall of the gear shaft (1), and an oil storage cavity (4) is arranged in the oil storage boss (3), characterized in that: A fuel injection pipe (16) is arranged at the top of the oil storage boss (3), and the outlet end of the fuel injection pipe (16) faces the tooth root of the gear (2); A radially extending oil suction hole (9) is arranged on the top surface of the oil storage boss (3), a fixed sealing block (10) and a movable sealing block (11) are sequentially arranged in the oil suction hole (9) from outside to inside, the movable sealing block (11) is slidably matched with the oil suction hole (9), the fixed sealing block (10) is fixedly arranged in the oil suction hole (9), an oil storage channel (13) is arranged between the fixed sealing block (10) and the movable sealing block (11), one end of the movable sealing block (11) away from the fixed sealing block (10) is installed in the oil suction hole (9) through an elastic member (12), the top of the oil storage channel (13) is communicated with the oil storage cavity (4) through a first oil passage (14), the top of the oil storage channel (13) is communicated with the fuel injection pipe (16) through a second oil passage (15), and a one-way oil passage structure (17) is arranged on the second oil passage (15) or the fuel injection pipe (16); A one-way air inlet channel (5) communicating the oil storage cavity (4) with the outside is arranged at the bottom of the oil storage cavity (4), and a piston (8) slidably matched with the inner wall of the oil storage cavity (4) is arranged inside the oil storage cavity (4).

2. The intermittent gear mechanism according to claim 1, wherein: A supplementary oil channel (6) communicating the oil storage cavity (4) with the outside is arranged at the top of the oil storage cavity (4), and a detachable plug (7) is arranged at the outer port of the supplementary oil channel (6); a detachable one-way valve (20) is arranged at the outer port of the one-way air inlet channel (5).

3. The intermittent gear mechanism according to claim 1, wherein: The fixed sealing block (10) is connected with a positioning column (19) through a connecting column (18), and the positioning column (19) is threadedly connected with the oil suction hole (9).

4. The intermittent gear mechanism according to claim 1, wherein: The oil suction hole (9) is a blind hole and is arranged on the side close to the gear (2).

5. The lubrication method of the intermittent gear mechanism according to claim 1, characterized in that: Including When the gear shaft (1) rotates, the movable sealing block (11) slides along the oil storage channel (13) under the action of centrifugal force until the movable sealing block (11) contacts the fixed sealing block (10), at this time the elastic member (12) elongates, and the movable sealing block (11) closes the first oil passage (14) and the second oil passage (15); When the gear shaft (1) stops rotating, the elastic member (12) pulls the movable sealing block (11) to reset, the first oil passage (14) and the second oil passage (15) are released from being closed, and a negative pressure is generated in the oil storage channel (13), sucking the lubricating oil in the oil storage cavity (4) into the oil storage channel (13) through the first oil passage (14); When the gear shaft (1) rotates again, the movable sealing block (11) slides along the oil storage channel (13) under the action of centrifugal force, pressing the lubricating oil in the oil storage channel (13) into the second oil channel (15). The lubricating oil is sprayed onto the root of the gear (2) after passing through the second oil channel (15) and the oil injection pipe (16). When the movable sealing block (11) contacts the fixed sealing block (10), the first oil channel (14) and the second oil channel (15) are closed; A one-way air intake channel (5) communicating the oil storage cavity (4) with the outside is provided at the bottom of the oil storage cavity (4), and a piston (8) slidably engaged with the inner wall of the oil storage cavity (4) is provided inside the oil storage cavity (4); The lubricating oil is stored between the piston (8) and the top of the oil storage cavity (4). When the lubricating oil in the oil storage cavity (4) is sucked into the oil storage channel (13) through the first oil channel (14), the piston (8) slides towards the top of the oil storage cavity (4), and the outside air enters between the piston (8) and the bottom of the oil storage cavity (4) through the one-way air intake channel (5); When the gear shaft (1) rotates again, the piston (8) is subjected to centrifugal force, pushing the lubricating oil into the oil storage channel (13) through the first oil channel (14) until the movable sealing block (11) closes the first oil channel (14) and the second oil channel (15).

6. The lubrication method according to claim 5, wherein: A supplementary oil channel (6) communicating the oil storage cavity (4) with the outside is provided at the top of the oil storage cavity (4), and a detachable plug (7) is provided at the outer port of the supplementary oil channel (6); a detachable one-way valve (20) is provided at the outer port of the one-way air intake channel (5); When the lubricating oil in the oil storage cavity (4) is exhausted, the plug (7) and the one-way valve (20) are removed, the supplementary oil channel (6) is connected to the lubricating oil storage container, and air is pumped through the one-way air intake channel (5) to drive the piston (8) to slide towards the bottom of the oil storage cavity (4), sucking the lubricating oil in the lubricating oil storage container into the oil storage cavity (4).

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