A type of gear coupling

Abstract

This application belongs to the field of machining technology, specifically relating to a gear coupling to address, to some extent, the technical problems of difficult lubrication and low operating efficiency during the maintenance of gear couplings. The gear coupling includes an internal gear ring, an external gear sleeve, an oil inlet, and a pressure relief valve. The external gear sleeve meshes appropriately with the interior of the internal gear ring. The oil inlet connects to the circumference of the internal gear ring and communicates with its interior. The pressure relief valve connects to the end of the internal gear ring and communicates with its interior. The gear coupling provided by this application allows for the injection of grease into the internal gear ring and external gear sleeve without disassembly, making operation simple and quick, improving lubrication efficiency, and possessing excellent practicality.

Description

Technical Field

[0001] This application belongs to the field of machining technology, specifically relating to a gear coupling. Background Technology

[0002] Gear couplings are a common type of mechanical transmission component. They mainly utilize the meshing between an internal gear ring and an external gear bushing to transmit torque and rotational motion between the two halves of the coupling. Gear couplings have a simple structure and stable operation. As long as they are operated under good lubrication and sealing conditions, they can ensure long-term reliable operation.

[0003] In the process of developing this application, the applicant discovered at least the following technical problems in the prior art: Gear couplings present technical challenges during maintenance, including difficulties in lubrication and low operational efficiency. Summary of the Invention

[0004] Based on the above-mentioned technical problems, this application provides a gear coupling to solve, to a certain extent, the technical problems of difficult lubrication and low operating efficiency in the maintenance process of gear couplings.

[0005] This application is achieved through the following technical solution: A gear coupling includes: an internal gear ring; an external gear sleeve adapted to mesh with the interior of the internal gear ring; an oil inlet connected to the periphery of the internal gear ring and communicating with the interior of the internal gear ring; and a pressure relief valve connected to the end of the internal gear ring and communicating with the interior of the internal gear ring.

[0006] In some embodiments, at least one of the pressure relief valves is connected to either end of the internal gear ring.

[0007] In some embodiments, a plurality of pressure relief valves are connected to either end of the internal gear ring, and the plurality of pressure relief valves are arranged circumferentially around the internal gear ring.

[0008] In some embodiments, the pressure relief valve includes: a valve body, connected to the end of the internal gear ring and having a pressure relief hole formed on the end of the internal gear ring; the inner end of the valve body has a first communication port, and the valve body communicates with the interior of the inner ring through the first communication port; the outer end of the valve body protrudes from the internal gear ring, and the outer end of the valve body has a second communication hole; a valve core, movably passing through the valve body, and having a first end and a second end opposite to each other; the first end being located inside the valve body, and the second end being located outside the valve body; the second end being able to seal the second communication hole; and an elastic element connected between the first end of the valve core and the outer end of the valve body.

[0009] In some embodiments, the pressure relief valve further includes: a lock nut located in the valve body and connected to the first end of the valve core, the lock nut being movable on the valve core along the axial direction of the valve core, and the elastic element being disposed between the lock nut and the outer end of the valve body.

[0010] In some implementations, the lock nut is threadedly connected to the valve core.

[0011] In some implementations, the valve body is threadedly connected to the internal gear ring.

[0012] In some embodiments, a first seal is provided between both sides of the internal gear ring in the axial direction and between the external gear sleeve.

[0013] In some embodiments, the internal gear ring includes a first internal gear sleeve and a second internal gear sleeve, the ends of the first internal gear sleeve and the second internal gear sleeve are mated together, and the oil inlet is connected to the periphery of one of the first internal gear sleeve and the second internal gear sleeve.

[0014] In some embodiments, a second seal is provided between the ends of the first inner toothed sleeve and the second inner toothed sleeve.

[0015] When maintaining the gear coupling provided in this application, the maintenance personnel can inject grease into the grease nozzle through the grease gun. The grease is injected between the internal gear ring and the external gear sleeve through the grease nozzle. Since there is a certain pressure when the grease is injected, the pressure pushes the grease to move in the direction of the pressure relief valve. Since the grease inlet is connected to the periphery of the internal gear ring and the pressure relief valve is connected to the end of the internal gear ring, the grease can flow from the periphery of the internal gear ring to the end of the internal gear ring. In this process, the grease passes through the internal gear ring and the external gear sleeve to the meshing tooth surface, thereby achieving tooth surface lubrication.

[0016] Therefore, the gear coupling provided in this application can inject grease into the internal gear ring and external gear bushing without disassembly, which is simple and quick to operate, improves the oil injection efficiency, and has good practicality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the gear coupling 10 in one or more embodiments of this application is shown; Figure 2 A schematic diagram of the structure of the first internal gear sleeve 111 or the second internal gear sleeve 112 is shown. Figure 3 A schematic diagram of the pressure relief valve 140 in some embodiments is shown; Figure 4 A schematic diagram of the external gear bushing 120 is shown.

[0019] Explanation of reference numerals in the attached figures: 10. Gear couplings; 110. Internal gear ring; 111. First internal gear sleeve; 112. Second internal gear sleeve; 113. Internal gear; 114. Oil inlet; 115. Pressure relief hole; 120. External gear bushing; 121. Shoulder; 122. External gear; 130. Oil inlet nozzle; 140. Pressure relief valve; 141. Valve body; 142. Valve core; 143. Elastic element; 144. First connecting hole; 145. Second connecting hole; 146. Lock nut; 150. Second sealing element; 160. First sealing element. Detailed Implementation

[0020] The technical solutions in this application will now be clearly and thoroughly described with reference to the accompanying drawings. Specifically, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0021] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0022] In related technologies, when lubricating and maintaining the gear coupling 10, the grease only passes through the space between the internal gear ring 110 and the external gear sleeve 120. The grease cannot lubricate the meshing tooth surfaces of the internal gear ring 110 and the external gear sleeve 120. Therefore, when adding oil to the gear coupling 10, maintenance personnel often need to remove the internal gear ring 110 from the external gear sleeve 120 to expose the tooth surface of the external gear sleeve 120, and then directly apply oil to the tooth surfaces of the internal gear ring 110 and the external gear sleeve 120, which results in low work efficiency.

[0023] Based on the above-mentioned technical problems, this application provides a gear coupling 10, which can inject grease onto the tooth surfaces of the inner gear ring 110 and the outer gear bushing 120 without disassembling the inner gear ring 110, thereby improving work efficiency.

[0024] Figure 1 A schematic diagram of the gear coupling 10 according to one or more embodiments of this application is shown. (In conjunction with...) Figure 1 The gear coupling 10 provided in this application includes an internal gear ring 110, an external gear sleeve 120, an oil inlet 130, and a pressure relief valve 140. The external gear sleeve 120 is adapted to mesh with the interior of the internal gear ring 110. The oil inlet 130 is connected to the periphery of the internal gear ring 110 and communicates with the interior of the internal gear ring 110. The pressure relief valve 140 is connected to the end of the internal gear ring 110 and communicates with the interior of the internal gear ring 110.

[0025] When maintaining the gear coupling 10 provided in this application, the maintenance personnel can inject grease into the grease nozzle through the grease gun. The grease is injected between the internal gear ring 110 and the external gear sleeve 120 through the grease nozzle. Since there is a certain pressure when the grease is injected, the pressure pushes the grease to move in the direction of the pressure relief valve 140. Since the oil inlet 130 is connected to the periphery of the internal gear ring 110 and the pressure relief valve 140 is connected to the end of the internal gear ring 110, the grease can flow from the periphery of the internal gear ring 110 to the end of the internal gear ring 110. In this process, the grease passes through the internal gear ring 110 and the external gear sleeve 120 to the meshing tooth surface, thereby achieving tooth surface lubrication.

[0026] Therefore, the gear coupling 10 provided in this application can inject grease into the internal gear ring 110 and the external gear sleeve 120 without disassembly, which is simple and quick to operate, improves the lubrication efficiency, and has good practicality. The details of the gear coupling 10 will now be further described with reference to the accompanying drawings.

[0027] In some embodiments, the internal gear ring 110 includes a first internal gear sleeve 111 and a second internal gear sleeve 112, with the ends of the first internal gear sleeve 111 and the second internal gear sleeve 112 joined together to form an internally hollow annular structure.

[0028] Figure 2 A schematic diagram of the structure of the first internal gear sleeve 111 or the second internal gear sleeve 112 is shown. (Combined with...) Figure 1 as well as Figure 2 In specific implementation, the opposite end faces of the first inner gear sleeve 111 and the second inner gear sleeve 112 are flange faces. The flange faces of the first inner gear sleeve 111 and the second inner gear sleeve 112 are connected by multiple bolts arranged at intervals. This is the prior art, and this application will not elaborate on it.

[0029] Combination Figure 2 The inner circumferential surfaces of the first inner gear sleeve 111 and the second inner gear sleeve 112 are provided with internal teeth 113 for meshing with the outer gear sleeve 120 on the circumferential surface of the outer gear sleeve 120. In addition, the inner gear ring 110 avoids the flange surface.

[0030] Combination Figure 2The oil inlet 130 is connected to the periphery of one of the first internal gear sleeve 111 and the second internal gear sleeve 112. Exemplarily, the flange face of the first internal gear sleeve 111 has a through-hole 114 along its radial direction, and the oil inlet 130 can be threaded into the oil inlet 114. This arrangement avoids the oil inlet 114 penetrating the internal gear 113, thus preventing it from affecting the meshing of the internal gear 113 and the external gear sleeve 120, and also avoids technical problems related to the strength of the internal gear 113.

[0031] It should be noted that the inlet nozzle 130 has a built-in check valve. When the fuel nozzle is inserted into the inlet nozzle 130 to inject fuel, the internal pressure of the fuel nozzle will open the check valve, and the inlet nozzle 130 will open. After the fuel nozzle is removed from the inlet nozzle 130, the check valve closes to maintain the sealing effect between the internal gear 113 and the external gear bushing 120.

[0032] In some embodiments, a second seal 150 is provided between the ends of the first inner gear sleeve 111 and the second inner gear sleeve 112 to prevent grease from leaking between them. Specifically, a sealing groove is provided on the flange face of the first inner gear sleeve 111, and the seal is interference-fitted into the sealing groove and protrudes from the opening side of the groove. When the first inner gear sleeve 111 and the second gear are bolted together, the flange face of the second gear presses against the seal, thereby ensuring the sealing effect of the first inner gear sleeve 111 and the second inner gear sleeve 112.

[0033] Combination Figure 1 In some embodiments, at least one pressure relief valve 140 is connected to either end of the internal gear ring 110. This arrangement allows grease to flow sufficiently between the internal gear 113 and the external gear sleeve 120, ensuring that the grease is evenly distributed between the internal gear 113 and the external gear sleeve 120.

[0034] Combination Figure 1 Multiple pressure relief valves 140 are connected to any end of the internal gear ring 110. These valves are spaced apart circumferentially around the internal gear ring 110 to further facilitate the flow of grease between the internal gear 113 and the external gear sleeve 120, ensuring even distribution of the grease between them. For example, each end of the first internal gear sleeve 111 and the second internal gear sleeve 112 is equipped with two pressure relief valves 140, arranged symmetrically about the central axis of the internal gear ring 110. In another configuration, each end of the first internal gear sleeve 111 and the second internal gear sleeve 112 is equipped with more pressure relief valves 140, such as three or four, depending on the specifications of the gear coupling 10. This application will not elaborate on this aspect.

[0035] Figure 3 A schematic diagram of the pressure relief valve 140 in some embodiments is shown. (In conjunction with...) Figure 2 as well asFigure 3 In some embodiments, the pressure relief valve 140 includes a valve body 141, a valve core 142, and an elastic element 143. The valve body 141 is connected to the end of the internal gear ring 110 and has a pressure relief hole 115 provided on the end of the internal gear ring 110. The inner end of the valve body 141 is provided with a first communication port, through which the valve body 141 communicates with the interior of the internal gear ring 110. The outer end of the valve body 141 protrudes from the internal gear ring 110 and has a second communication hole 145. The valve core 142 is movably inserted through the valve body 141 and has a first end and a second end opposite to each other. The first end is located inside the valve body 141, and the second end is located outside the valve body 141. The second end can seal the second communication hole 145. The elastic element 143 is connected between the first end of the valve core 142 and the outer end of the valve body 141. When no oil is added, the valve body 141 is balanced inside and out. Under the action of the elastic element 143, the valve core 142 closes the second connecting hole 145 of the valve body 141. When oil is added, due to the pressure of the oil gun, the grease pushes the valve core 142 to move outward, and the valve core 142 opens the second connecting hole 145. The pressure in the cavity between the inner gear ring 110 and the outer gear bushing 120 is discharged through the first connecting hole 144 and the second connecting hole 145. The grease flows in the cavity between the inner gear ring 110 and the outer gear bushing 120 to pass through the meshing tooth surfaces of the inner gear ring 110 and the outer gear bushing 120 to achieve tooth surface lubrication.

[0036] Combination Figure 3 In some embodiments, the pressure relief valve 140 further includes a lock nut 146, which is located inside the valve body 141 and connected to the first end of the valve core 142. The lock nut 146 is movable on the valve core 142 along its axial direction. An elastic element 143 is disposed between the lock nut 146 and the outer end of the valve body 141. This arrangement allows the position of the lock nut 146 to be adjusted so that the elastic element 143 is within a suitable range.

[0037] In practice, the lock nut 146 is threadedly connected to the valve core 142, allowing for quick adjustment of the lock nut 146's position on the valve core 142. Additionally, the elastic element 143 is a spring, sleeved on the valve core 142, with both ends connected to and abutting against the outer ends of the lock nut 146 and the valve body 141. The valve core 142 guides the compression deformation of the elastic element 143, preventing it from deviating from its movement trajectory.

[0038] In some embodiments, the valve body 141 is threadedly connected to the internal gear ring 110 to facilitate the installation of the valve body 141.

[0039] In some embodiments, a first seal 160 is provided on both sides of the internal gear ring 110 in the axial direction and between the internal gear ring 110 and the external gear sleeve 120 to ensure a sealing effect between the internal gear ring 110 and the external gear sleeve 120 and to prevent grease from leaking from both sides of the internal gear ring 110 in the axial direction and between the external gear sleeve 120. The arrangement of the first seal 160 and the second seal 150 is consistent, and will not be described in detail in this application.

[0040] By setting the first seal 160 and the second seal 150, this application can ensure the sealing between the internal gear ring 110 and the external gear bushing 120, avoid oil spillage during operation of the coupling, and prevent poor lubrication of the meshing tooth surfaces, thereby improving the service life of the coupling.

[0041] It should be noted that the opening pressure of the pressure relief valve 140 in this application must be less than the pressure required for the grease to break through the first seal 160 and the second seal 150, so as to avoid damaging the first seal 160 and the second seal 150 during refueling.

[0042] Figure 4 A schematic diagram of the external gear bushing 120 is shown. (Combined with...) Figure 4 In some embodiments, the outer peripheral surface of the external gear sleeve 120 is provided with a shoulder 121 and external teeth 122. The ends of the first internal gear sleeve 111 and the second internal gear sleeve 112 are sealed and overlapped at the shoulder 121 of the external gear sleeve 120, and the internal teeth 113 of the first internal gear sleeve 111 and the second internal gear sleeve 112 mesh with the external teeth 122. In addition, the inner hole of the external gear sleeve 120 is connected to the output shaft or input shaft of the equipment by a key for transmitting circumferential torque.

[0043] This application improves the lubrication efficiency of gear couplings 10: Previously, lubrication maintenance of one gear coupling 10 required disassembling the bolts connecting the two internal gear sets 113, prying open the internal gear sets 113, applying oil by hand, and then reassembling the flange bolts of the internal gear sets 113, which took approximately 2 people and 2 hours. With the gear coupling 10 provided in this application, lubrication can be done directly at the lubrication nozzle, requiring only 1 person and 10 minutes, significantly improving work efficiency and saving labor costs.

[0044] In addition, this application is beneficial to the daily maintenance of the coupling, ensures the lubrication of the coupling, avoids damage to the coupling body seal during the lubrication process, and extends the service life of the coupling.

[0045] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0047] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0048] In the description of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0050] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0051] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A gear coupling, characterized in that, The gear coupling includes: Internal gear ring; An external gear sleeve, which meshes appropriately with the interior of the internal gear ring; The oil inlet is connected to the periphery of the internal gear ring and communicates with the interior of the internal gear ring; A pressure relief valve is connected to the end of the internal gear ring and communicates with the interior of the internal gear ring.

2. The gear coupling according to claim 1, characterized in that, At least one of the pressure relief valves is connected to either end of the internal gear ring.

3. The gear coupling according to claim 2, characterized in that, Multiple pressure relief valves are connected to any end of the internal gear ring, and the multiple pressure relief valves are arranged at intervals around the circumference of the internal gear ring.

4. The gear coupling according to any one of claims 1-3, characterized in that, The pressure relief valve includes: A valve body is connected to the end of the internal gear ring and has a pressure relief hole provided on the end of the internal gear ring. The inner end of the valve body is provided with a first communication port, and the valve body communicates with the interior of the internal gear ring through the first communication port. The outer end of the valve body protrudes from the internal gear ring and is provided with a second communication hole. The valve core is movably inserted through the valve body and has a first end and a second end opposite to each other. The first end is located inside the valve body and the second end is located outside the valve body. The second end can seal the second connecting hole. An elastic element is connected between the first end of the valve core and the outer end of the valve body.

5. The gear coupling according to claim 4, characterized in that, The pressure relief valve also includes: A lock nut is located inside the valve body and connected to the first end of the valve core. The lock nut can move along the axial direction of the valve core on the valve core. The elastic element is disposed between the lock nut and the outer end of the valve body.

6. The gear coupling according to claim 5, characterized in that, The lock nut is threadedly connected to the valve core.

7. The gear coupling according to claim 4, characterized in that, The valve body is threadedly connected to the internal gear ring.

8. The gear coupling according to any one of claims 1-3 and 5-7, characterized in that, A first seal is provided on both sides of the internal gear ring in the axial direction and between the external gear sleeve.

9. The gear coupling according to any one of claims 1-3 and 5-7, characterized in that, The internal gear ring includes a first internal gear sleeve and a second internal gear sleeve, with the ends of the first internal gear sleeve and the second internal gear sleeve mating together, and the oil inlet is connected to the periphery of one of the first internal gear sleeve and the second internal gear sleeve.

10. The gear coupling according to claim 9, characterized in that, A second seal is provided between the ends of the first inner toothed sleeve and the second inner toothed sleeve.

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