Damping worm structure with non-rotating oil cylinder at tail end

Abstract

The utility model discloses a damping worm structure with a non-rotating oil cylinder at the tail end, which comprises a worm provided with a piston, a sealing element and a thrust bearing, and further comprises an oil duct arranged on the sealing element, the piston is provided with a liquid storage tank communicated with the oil duct, and the liquid storage tank is used for draining lubricating oil and is used for lubricating a gap between the piston and the sealing element. According to the damping worm structure with the non-rotating oil cylinder at the tail end, the lubricating oil is conveyed through the oil duct through the cavity, flows into the gap between the inner ring of the sealing piece and the outer ring of the piston and flows into the liquid storage tank to be stored, so that the piston fills the gap with the lubricating oil in the liquid storage tank in the process of transversely moving along with the worm, and the lubricating oil in the liquid storage tank is prevented from rotating. And the lubricating oil can continuously lubricate the gap, so that the abrasion of the piston to the sealing element in the transverse moving process is smaller, and the service life of the sealing element is longer.

Description

Technical Field

[0001] The utility model relates to the technical field of damping worms, and more specifically to a damping worm structure with a non-rotating oil cylinder at the end. Background Art

[0002] An oil cylinder is often arranged at the end of a damping worm to make the worm rotate more smoothly. The piston of the oil cylinder has a high rotational speed as the worm rotates, and under the action of oil pressure, the worm has a slight axial movement, so as to make the damping worm closely adhere to the tooth surface of the worm gear rotating in the opposite direction to the working table rotation direction, thereby achieving the purposes of "clearance elimination" and shock prevention.

[0003] According to the publication number: CN204239694U, and the publication date: April 1, 2015, a damping worm with a non-rotating oil cylinder at the end is disclosed.

[0004] In the prior art including the above patent, when the piston does not rotate synchronously with the worm, the damping worm with axial movement will cause lateral friction between the piston and the piston seal, and still cause certain wear to the inner ring of the seal. Even when the service life of the seal is increased and the workload of insertion and replacement is reduced, the piston with lateral wear will still reduce its service life. Content of the Utility Model

[0005] The purpose of the utility model is to provide a damping worm structure with a non-rotating oil cylinder at the end, aiming to solve the problems generated above.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A damping worm structure with a non-rotating oil cylinder at the end includes a worm provided with a piston, a seal and a thrust bearing, and also includes an oil passage opened on the seal, and a liquid storage groove communicated with the oil passage is opened on the piston;

[0008] The liquid storage groove drains lubricating oil and is used to lubricate the gap between the piston and the seal.

[0009] Preferably, a plug block is slidably arranged in the oil passage, and a plug hole intermittently communicating with the oil passage is opened on the plug block.

[0010] Preferably, the piston axially moves along with the worm to push the plug block to move horizontally.

[0011] Preferably, a liquid passage communicated with the liquid storage groove is opened in the piston, and the liquid passage drains lubricating oil to the thrust bearing.

[0012] Preferably, a transfer cavity communicated with the liquid passage and the liquid storage groove is opened in the piston;

[0013] A flap is hingedly arranged in the transfer cavity, and the flap deflects as the piston moves horizontally to push lubricating oil into the liquid channel for replenishment.

[0014] Preferably, in the deflected state, the flap blocks the backflow and overflow of the lubricating oil in the liquid storage tank.

[0015] In the above technical solution, a damping worm structure with a non-rotating oil cylinder at the end provided by the present utility model has the following beneficial effects: The lubricating oil is transported through the cavity via the oil channel, and the lubricating oil flows into the gap between the inner ring of the seal and the outer ring of the piston, and the lubricating oil flows into the liquid storage tank for storage. When the piston moves horizontally along with the worm, the lubricating oil in the liquid storage tank is filled into the gap, enabling the lubricating oil to continuously lubricate the gap, reducing the wear of the seal caused by the piston during horizontal movement, and enabling the seal to have a longer service life. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of the worm, piston, seal and thrust bearing structures provided by the embodiment of the present utility model;

[0018] Figure 2 Side cross-sectional view of the worm, piston, seal and thrust bearing provided by the embodiment of the present utility model;

[0019] Figure 3 For Figure 2 Enlarged view of part A of

[0020] Description of the reference numerals:

[0021] 1. Worm; 11. Piston; 12. Seal; 13. Thrust bearing; 2. Oil channel; 21. Plug; 211. Plug hole; 22. Liquid storage tank; 221. Channel; 23. Transfer cavity; 231. Flap; 24. Liquid channel; 241. Retention tank. Detailed Embodiments

[0022] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail in conjunction with the drawings.

[0023] As Figures 1-3As shown in the figure, a damping worm structure with a non-rotating oil cylinder at the end includes a worm 1 provided with a piston 11, a seal 12 and a thrust bearing 13, and also includes an oil passage 2 opened on the seal 12. A liquid storage tank 22 communicating with the oil passage 2 is opened on the piston 11;

[0024] The liquid storage tank 22 drains lubricating oil and is used to lubricate the gap between the piston 11 and the seal 12.

[0025] Specifically, the piston 11, the seal 12 and the thrust bearing 13 are prior arts and will not be elaborated here. A cavity for storing lubricating oil is provided on the damping worm mechanism, and the oil passage 2 is communicated with the cavity to convey lubricating oil.

[0026] The lubricating oil is conveyed through the cavity via the oil passage 2, and the lubricating oil flows into the gap between the inner ring of the seal 12 and the outer ring of the piston 11, and then flows into the liquid storage tank 22 for storage. When the piston 11 moves horizontally along with the worm 1, the lubricating oil in the liquid storage tank 22 fills the gap, so that the lubricating oil can continuously lubricate the gap, reducing the wear of the seal 12 caused by the horizontal movement of the piston 11 and enabling the seal 12 to have a longer service life.

[0027] As a further embodiment provided by the present utility model, a plug 21 is slidably arranged in the oil passage 2, and a plug hole 211 intermittently communicating with the oil passage 2 is opened on the plug 21.

[0028] Specifically, a vertically arranged slideway is opened in the oil passage 2. A spring is fixedly installed between the plug 21 and the slideway, and the plug 21 slides in the slideway.

[0029] When the plug 21 moves horizontally, the plug hole 211 on the plug 21 is connected to the oil passage 2, so that the lubricating oil in the oil passage 2 is conveyed to the liquid storage tank 22. By default, the plug 21 blocks the oil passage 2, and at this time the plug hole 211 is in the slideway, so that the lubricating oil in the cavity will not leak when the piston 11 is inserted.

[0030] As another further embodiment provided by the present utility model, the piston 11 moves axially along with the worm 1 to push the plug 21 to move horizontally and slide.

[0031] Specifically, a protrusion in contact and cooperation with the plug 21 is provided on the piston 11. The protrusion is a prior art and will not be elaborated here.

[0032] When the piston 11 moves horizontally, it pushes the plug 21 to compress the spring, and the plug hole 211 on the plug 21 is connected to the oil passage 2. At this time, the lubricating oil in the oil passage 2 can be conveyed.

[0033] As another embodiment further provided by the present utility model, a liquid passage 24 communicating with the liquid storage tank 22 is provided in the piston 11, and the liquid passage 24 drains lubricating oil to the thrust bearing 13.

[0034] Specifically, the liquid passages 24 are symmetrically arranged on the piston 11 for corresponding to the two thrust bearings 13. The liquid passages 24 are located at the upper end of the horizontally arranged piston 11, and the inner wall of the liquid passage 24 has an inclined surface facing downward toward the thrust bearing 13.

[0035] Furthermore, a retention groove 241 is provided at the end of the liquid passage 24, so that the retention groove 241 can naturally precipitate the dirt in the lubricating oil to reduce the interference of the dirt on the rotation of the thrust bearing 13.

[0036] The lubricating oil flowing into the liquid passage 24 flows by itself under the action of the inclined surface, which facilitates the rapid lubrication of the thrust bearing 13 by the lubricating oil, enables the thrust bearings 13 on both sides of the piston 11 to be lubricated by the lubricating oil at the same time, and makes the force transmitted to the thrust bearing 13 more stable during the rotation of the worm 1.

[0037] As yet another embodiment further provided by the present utility model, a transfer chamber 23 communicating with the liquid passage 24 and the liquid storage tank 22 is provided in the piston 11;

[0038] A flap 231 is hingedly arranged in the transfer chamber 23, and the flap 231 deflects and pushes the lubricating oil to supplement the liquid passage 24 as the piston 11 moves horizontally.

[0039] Specifically, a passage 221 is provided between the liquid storage tank 22 and the transfer chamber 23, so that the inclined passage 221 can enable the lubricating oil to quickly flow into the transfer chamber 23, and the lubricating oil is diverted by the transfer chamber 23 and flows into the two liquid passages 24.

[0040] By providing power to the flap 231 during the horizontal movement of the piston 11, the flap 231 swings in the transfer chamber 23, so that the end of the flap 231 can quickly push the lubricating oil to the two liquid passages 24, increasing the flow rate of the lubricating oil flowing to the thrust bearing 13 to ensure the lubrication effect of the lubricating oil.

[0041] As yet another embodiment further provided by the present utility model, the flap 231 in the deflected state blocks the backflow and overflow of the lubricating oil in the liquid storage tank 22.

[0042] Specifically, during the swinging process of the flap 231, due to the filling of the lubricating oil in the transfer chamber 23, the reset rate of the flap 231 is reduced, so as to reduce the occurrence of the backflow of the lubricating oil.

[0043] Through the flap 231 in the swinging state, its end pushes the lubricating oil into the liquid passage 24, so as to Figure 3In the front view angle, when the middle part of the flap 231 swings to the right, a vacancy appears in the transfer cavity 23 on the left side of the flap 231, allowing the lubricating oil in the passage 221 to replenish into the transfer cavity 23. At this time, the liquid storage tank 22 continues to replenish the lubricating oil downward; when the middle part of the flap 231 swings to the left, the flap 231 isolates the left side of the transfer cavity 23, preventing the lubricating oil from replenishing into the transfer cavity 23. At this time, the liquid storage tank 22 stops replenishing the lubricating oil downward. The purpose is to reduce the accumulation of lubricating oil in the transfer cavity 23 and the backflow into the liquid storage tank 22, reducing the problem of lubricating oil overflowing from the gap, ensuring that the lubricating oil is not excessive and can also improve the lubrication effect.

[0044] Working principle: During the lateral movement of the plug 21, the plug hole 211 on the plug 21 is connected to the oil passage 2, allowing the lubricating oil in the oil passage 2 to be transported into the liquid storage tank 22. The lubricating oil flows into the gap between the inner ring of the seal 12 and the outer ring of the piston 11, and the lubricating oil flows into the liquid storage tank 22 for storage. When the piston 11 moves laterally along with the worm 1, the lubricating oil in the liquid storage tank 22 is filled into the gap, enabling the lubricating oil to continuously lubricate the gap, reducing the wear caused by the piston 11 to the seal 12 during lateral movement, and enabling the seal 12 to have a longer service life.

[0045] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A damping worm structure with a non-rotating oil cylinder at the end, comprising a worm (1) provided with a piston (11), a seal (12) and a thrust bearing (13), characterized in that: It also includes an oil passage (2) formed on the sealing member (12), and a liquid storage tank (22) connected to the oil passage (2) is formed on the piston (11); The liquid storage tank (22) drains lubricating oil and is used to lubricate the gap between the piston (11) and the sealing element (12).

2. A damping worm structure with a non-rotating cylinder at the end according to claim 1, characterized in that: A plug block (21) is slidably arranged in the oil passage (2), and a plug hole (211) intermittently connected to the oil passage (2) is provided on the plug block (21).

3. A damping worm structure with a non-rotating cylinder at the end according to claim 2, characterized in that: The piston (11) moves axially along with the worm (1) to push the plug (21) to slide laterally.

4. A damping worm structure with a non-rotating cylinder at the end according to claim 2, characterized in that: The piston (11) is provided with a liquid passage (24) connected to the liquid storage tank (22), and the liquid passage (24) guides lubricating oil to the thrust bearing (13).

5. A damping worm structure with a non-rotating cylinder at the end according to claim 4, characterized in that: The piston (11) is provided with a transfer chamber (23) which is connected to the liquid channel (24) and the liquid storage tank (22); A flap (231) is hingedly provided in the transfer chamber (23), and the flap (231) is deflected and pushes the lubricating oil into the liquid channel (24) as the piston (11) moves laterally.

6. A damping worm structure with a non-rotating cylinder at the end according to claim 5, characterized in that: In the deflected state, the flap (231) prevents the lubricating oil in the liquid storage tank (22) from overflowing backwards.

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