Grease nipple for a fork lift truck and method of operation thereof

Abstract

This invention belongs to the field of general vehicle technology, specifically relating to the arrangement of lubrication devices, and particularly to grease fittings for forklifts and their working methods. One type of grease fitting for forklifts includes: a base embedded in the mast; a grease fitting rotatably mounted on the base; a partition plate extending axially along the inner wall of the base into the grease fitting; dividing the grease fitting into a first chamber and a second chamber that are interconnected; and an adjusting plate fixed to the inner wall of the grease fitting and extending axially into the base, the axial length of which is not less than the axial length of the partition plate; when the adjusting plate is parallel to and in contact with the partition plate, it is suitable for isolating the first and second chambers within the grease fitting; wherein, before grease filling, the grease fitting drives the adjusting plate to rotate 180°, and the adjusting plate pushes the grease in the second chamber to flow into the first chamber or into the oil storage chamber within the mast; after the grease is filled, the newly injected grease pushes the grease remaining from the previous filling in the grease fitting outwards from the second flow channel.

Description

Technical Field

[0001] This invention belongs to the field of general vehicle technology, specifically relating to the arrangement of lubrication devices, and particularly to grease fittings for forklifts and their working methods. Background Technology

[0002] As a crucial piece of equipment in industrial material handling, the stable operation of a forklift's hydraulic lifting system directly impacts work efficiency and safety. To ensure smooth operation of the hydraulic lifting device, grease (lubricating grease) needs to be periodically injected into the mast's oil reservoir to reduce frictional wear. Current industry practice involves installing exposed grease fittings on the side walls of the forklift frame, with manual grease application using a specialized grease gun.

[0003] In traditional grease filling, the grease nipple is considered full when freshly injected grease overflows from it. However, this method has a significant technical flaw: some grease that hasn't actually participated in lubrication will always remain inside the nipple. This residual grease, due to its long-term presence inside the nipple, will oxidize and deteriorate, altering its chemical properties and reducing its lubricating performance.

[0004] Residual grease can trigger a chain reaction of problems. When new grease is added next time, the oxidized residue will contaminate the newly injected grease, creating a vicious cycle. More seriously, the oxidized and hardened grease will gradually clog the internal channels of the grease fitting. This phenomenon can lead to abnormal pressure during grease filling, and may even prevent the grease from smoothly entering the friction surfaces, resulting in ineffective lubrication of the hydraulic lifting device.

[0005] Therefore, how to solve the problem of grease contamination remaining in the internal cavity of the grease fitting and add new grease is a technical problem that urgently needs to be solved in this field.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore, the above description is not considered to constitute information related to the technology. Summary of the Invention

[0007] This disclosure provides at least one grease fitting for forklifts and its working method.

[0008] In a first aspect, embodiments of this disclosure provide a grease fitting for forklifts, comprising: The base is embedded in the gantry and is connected to the oil storage chamber in the first flow channel gantry. The oil nozzle is rotatably mounted on the base and has a second flow channel inside that communicates with the first flow channel; An isolation plate extends axially along the inner wall of the base into the oil injection nozzle; The sidewall of the isolation plate along its length is fixed to the inner wall of the base, and the oil injection nozzle is divided into a first chamber and a second chamber that are interconnected. The adjusting plate is fixed to the inner wall of the oil nozzle and extends axially into the base, and its axial length is not less than the axial length of the isolation plate. When the adjusting plate is parallel to and in contact with the isolation plate, it is suitable for isolating the first and second chambers inside the oil injector. Before oil injection, the oil injection nozzle drives the adjusting plate to rotate 180°, and the adjusting plate pushes the grease in the second chamber to flow into the first chamber or into the oil storage chamber in the gantry. After the grease is filled, the newly injected grease pushes the grease residue from the previous injection in the grease nozzle outward from the second flow channel. In an optional embodiment, the ratio of the width of the partition plate to the diameter of the second flow channel is 0.8-0.9:1.

[0009] In one optional embodiment, the adjusting plate extends axially into the first flow channel along the inner wall of the oil injector, and the ratio of the width of the adjusting plate to the diameter of the second flow channel is 0.3-0.4:1.

[0010] In one optional embodiment, a guide plate is provided at the outer end of the isolation plate. The guide plate is arc-shaped, and the two ends of the guide plate in the width direction respectively abut against the inner wall of the second flow channel. The guide plate is used to guide the newly injected grease through the second chamber to the oil storage chamber inside the gantry.

[0011] In one optional embodiment, a tapered hole is formed at the outer end of the oil filling nozzle, which penetrates the oil filling nozzle; A sealing steel ball is installed inside the conical hole, and the sealing steel ball is adapted to open and close the conical hole.

[0012] In one optional embodiment, a return spring is provided on the inner wall of the oil nozzle. The return spring extends axially in a funnel shape and is used to push the sealing steel ball to close the tapered hole.

[0013] In one optional embodiment, a sealing element is fitted at the connection between the outer wall of the base and the gantry, and the end wall of the sealing element abuts against the end wall of the oil nozzle.

[0014] In one alternative embodiment, the seal includes: A sealing disc, the disc extending radially along the base; A sealing ring, which is perpendicular to the sealing disc and integrally formed, is adapted to be inserted into the connection gap between the outer wall of the base and the frame.

[0015] In one alternative embodiment, the base embedded in the gantry is hollow inside and communicates with the oil storage chamber inside the gantry. Rotate the oil nozzle mounted on the base, which connects to the oil storage chamber; An isolation plate is provided inside the base. The isolation plate extends axially along the base toward the oil injection nozzle. One end of the isolation plate in the width direction abuts against the inner wall of the oil injection nozzle, and the other end has a gap with the inner wall of the oil injection nozzle. An adjusting plate is axially provided on the inner wall of the oil injector, the length of which is not less than the length of the isolation plate, and the adjusting plate is suitable for sealing the gap between the isolation plate and the inner wall of the oil injector when it abuts against the isolation plate. Before oiling, the oiling nozzle drives the adjusting plate to rotate 180°, and the adjusting plate pushes the grease on one side of the isolation plate to flow to the other side or into the oil storage chamber inside the gantry. During oil filling, the oil nozzle is rotated in the opposite direction to reset until the adjusting plate and the isolation plate abut against each other. The grease gun is then inserted into the oil nozzle and flows through the isolation plate to the oil storage chamber. After the grease is filled, the newly injected grease pushes the grease residue from the previous injection in the grease injector to overflow outward from the second flow channel.

[0016] In one optional embodiment, a guide plate is provided at the outer end of the isolation plate. The guide plate is arc-shaped, and the two ends of the guide plate in the width direction respectively abut against the inner wall of the oil injection nozzle. The guide plate is used to guide the newly injected grease to flow through the isolation plate to the oil storage chamber.

[0017] Secondly, this disclosure also provides a method for operating a grease fitting for a forklift, the method comprising: Before oiling, the oiling nozzle drives the adjusting plate to rotate 180°, and the adjusting plate pushes the grease in the second chamber to flow into the first chamber or into the oil storage chamber in the gantry; During grease filling, the grease nozzle rotates in the reverse direction to reset and make the adjusting plate abut against the isolation plate. The grease gun is inserted into the grease nozzle, and the new grease flows through the side wall of the isolation plate to the oil storage chamber. After the grease is filled, the newly injected grease pushes the grease residue from the previous injection in the grease injector to overflow outward from the second flow channel.

[0018] Thirdly, this disclosure also provides a forklift, wherein the mast is disposed at the front of the forklift.

[0019] The beneficial effects of this invention are that it provides a grease nipple for forklifts and its working method. By rotating the grease nipple 180°, the adjusting plate pushes away residual grease, preventing grease that has been oxidized and deteriorated due to long-term retention in the grease nipple from flowing entirely into the oil reservoir. This directly solves the problem of residual grease contaminating new grease mentioned in the background art. Furthermore, when the grease is full, the newly injected grease, due to the cooperation of the isolation plate and guide plate, isolates and guides the grease, causing it to automatically push the residual grease out of the second flow channel, forming a self-cleaning process. This prevents the flow channel from becoming blocked, ensuring that the lubricant smoothly enters the friction surface, thereby guaranteeing the stable operation of the forklift's hydraulic lifting device.

[0020] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 A perspective view of a forklift grease fitting provided in an embodiment of this disclosure; Figure 2 A perspective view of the gantry and oil nozzle provided in an embodiment of this disclosure; Figure 3 A perspective view of the oil nozzle and base provided in an embodiment of this disclosure; Figure 4 Provided for the embodiments of this disclosure Figure 3 A partial sectional view of AA; Figure 5 Provided for the embodiments of this disclosure Figure 3 A partial sectional view of BB; Figure 6 This is a schematic diagram of the oil nozzle rotating 180° relative to the base, provided in an embodiment of this disclosure. Figure 7 This is a schematic diagram showing the state of a grease gun inserted into the grease nozzle according to an embodiment of this disclosure.

[0024] In the picture: 1. Gantry; 2. Base; 20. First flow channel; 3. Oil nozzle; 31. Tapered hole; 32. Sealing steel ball; 33. Return spring; 34. First chamber; 35. Second chamber; 4. Isolation plate; 41. Guide plate; 5. Adjustment plate; 6. Seals; 61. Sealing disc; 62. Sealing ring; 7. Forklift; 8. Grease gun. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0027] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify an entire column of elements when following a column of elements. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0028] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise expressly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0029] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0030] Research has shown that forklifts, as crucial equipment in industrial material handling, rely heavily on the stable operation of their hydraulic lifting systems, which directly impact work efficiency and safety. To ensure smooth operation of the hydraulic lifting system, grease (lubricating oil) needs to be periodically injected to reduce frictional wear. Current industry practice involves installing exposed grease fittings on the side walls of the forklift frame, with manual grease application using a specialized grease gun.

[0031] In traditional grease filling, the grease nipple is considered full when freshly injected grease overflows from it. However, this method has a significant technical flaw: some grease that hasn't actually participated in lubrication will always remain inside the nipple. This residual grease, due to its long-term presence inside the nipple, will oxidize and deteriorate, altering the grease's (lubricating grease's) chemical properties. This not only breeds harmful substances but also significantly reduces its lubricating performance.

[0032] Residual grease can trigger a chain reaction of problems. When new grease is added next time, the oxidized residue will contaminate the newly injected grease, creating a vicious cycle. More seriously, the oxidized and hardened grease will gradually clog the internal channels of the grease fitting. This phenomenon can lead to abnormal pressure during grease filling, and may even prevent the grease from smoothly entering the friction surfaces, resulting in ineffective lubrication of the hydraulic lifting device.

[0033] Therefore, how to solve the problem of grease contamination remaining in the internal cavity of the grease fitting and add new grease is a technical problem that urgently needs to be solved in this field.

[0034] The defects in the above solutions and the reasons for their occurrence are the results of the inventors' practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventors' contributions to this disclosure.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] like Figure 1 and Figure 4 As shown, at least one embodiment provides a grease fitting for a forklift 7, comprising: The system comprises a gantry 1, a base 2, an oil injector 3, a partition plate 4, and an adjusting plate 5. The base 2 is embedded within the gantry 1 and has a first flow channel 20 inside, which communicates with the oil storage chamber within the gantry 1. The oil injector 3 is rotatably mounted on the base 2 and has a second flow channel inside, which communicates with the first flow channel 20. The inner diameters of the first flow channel 20 and the second flow channel are identical. The isolation plate 4 is fixed to the inner wall of the base 2 and extends axially along the inner wall of the base 2 into the oil nozzle 2, that is, axially into the second flow channel. The isolation plate 4 divides the oil nozzle 3 into two interconnected chambers, the first chamber 34 and the second chamber 35. That is, one end of the isolation plate 4 in the width direction is tightly fitted with the inner wall of the second flow channel, and the other end has a gap with the inner wall of the second flow channel. The adjusting plate 5 is set on the inner wall of the oil nozzle 3 and extends axially along the inner wall of the oil nozzle 3. Its length is not less than that of the isolation plate 4. When the adjusting plate 5 abuts against the isolation plate 4, the adjusting plate 5 can seal the gap between the end wall of the isolation plate 4 and the second flow channel. That is, when the adjusting plate 5 is parallel and fitted with the isolation plate 4, it is suitable for isolating the first chamber 34 and the second chamber 35 in the oil nozzle 3. At this time, the first chamber 34 and the second chamber 35 are no longer connected.

[0038] Reference Appendix Figure 6 and Figure 7 Before filling with oil, manually rotate the oil nozzle 3 180° to drive the adjusting plate 5 to push the residual grease in the second chamber 35 to the first chamber 34 or the oil storage chamber in the gantry 1. When the oil level in the oil storage chamber is lower than the normal value, the grease near the base 2 of the oil nozzle 3 will flow into the oil storage chamber. At this time, both the first chamber 34 and the second chamber 35 in the oil nozzle 3 are not full. Therefore, when the adjusting plate 5 rotates relative to the base 2, it can push the grease in the second chamber 35 to the first chamber 34. Figure 6 F1 indicates the rotation direction of the grease nozzle 3 before grease filling. When filling grease, rotate the grease nozzle 3 in the opposite direction to reset it, so that the adjusting plate 5 abuts against the isolation plate 4. At this time, insert the grease gun 8, and the new grease flows into the oil storage chamber through the side wall of the isolation plate 4. Figure 7F1 indicates the flow direction of grease from the grease gun 8 into the oil reservoir within the gantry 1. After the oil reservoir in the gantry is filled with grease, the grease gun 8 continues to supply grease into the base 2. The pressure of the new grease pushes the residual grease out of the first chamber 34 (the grease remaining from the previous lubrication), forming a continuous lubrication cycle. Figure 7 F2 in the designation indicates the outward flow direction of residual grease in the grease nozzle 3. This design ensures that the second chamber 35 is clean before each grease application, extending the maintenance interval in practical applications (e.g., from weekly to monthly) and reducing downtime. In this embodiment, when the grease gun 8 is inserted into the grease nozzle 3 and pushes the sealing steel ball 32 to retract into the grease nozzle 3, there will be a gap between the outer wall of the grease gun 8 and the inner wall of the grease inlet of the grease nozzle 3, allowing residual grease in the first chamber 34 to overflow.

[0039] Reference Appendix Figure 5 The width of the isolation plate 4 is in the ratio of 0.8-0.9:1 to the diameter of the second flow channel (e.g., when the diameter of the second flow channel is 10mm, the width of the isolation plate 4 is 8-9mm). This ensures the effectiveness of the chamber division and prevents short-circuiting of the grease. The adjusting plate 5 extends axially into the first flow channel 20 along the inner wall of the grease nozzle 3, and the width of the adjusting plate 5 is in the ratio of 0.3-0.4:1 to the diameter of the second flow channel (e.g., the width of the adjusting plate 5 is 3-4mm). When the grease nozzle 3 rotates relative to the base 2, it can effectively push the grease while reducing rotational resistance. The width of the adjusting plate 5 is greater than the gap between the isolation plate 4 and the inner wall of the second flow channel. When the adjusting plate 5 abuts against the isolation plate 4, the adjusting plate 5 can seal the gap between the end wall of the isolation plate 4 and the second flow channel, so that the first chamber 34 and the second chamber 35 on both sides of the isolation plate 4 are not interconnected. Figure 4 As shown, the above-mentioned proportional design is clearly visible in the cross-sectional view, which helps the grease to be evenly distributed under high pressure, adapting to the high-load operating conditions of the forklift 7. Furthermore, the above-mentioned size range is based on fluid dynamics experiments and is compatible with greases of different viscosities (such as NLGI grade 2 or 3), enhancing the versatility of the grease fittings.

[0040] Reference Appendix Figure 4 The outer end of the isolation plate 4 is provided with an arc-shaped guide plate 41, the two ends of which abut against the inner wall of the second flow channel, which can guide the new grease to flow along a specific path to the oil storage chamber, reducing eddies and pressure loss. The tapered hole 31 at the outer end of the oil nozzle 3 is provided with a sealing steel ball 32 and a return spring 33. The spring is flared and pushes the steel ball to close the tapered hole 31 to prevent dust from entering or grease from leaking.

[0041] Reference Appendix Figure 3 and Figure 4The base 2 has a sealing element 6 installed at the connection between its outer wall and the mast 1. This includes a radially extending sealing disc 61 and a vertical sealing ring 62. The integrated design is inserted into the gap, which improves the waterproof and shockproof performance and makes it suitable for the use of the forklift 7 in humid or vibrating environments.

[0042] At least one embodiment provides a grease nipple for a forklift 7, comprising: a base 2 embedded in a mast 1, the base 2 being hollow and communicating with an oil reservoir within the mast 1; a grease nipple 3 rotatably mounted on the base 2, communicating with the oil reservoir; a partition plate 4 disposed inside the base 2, the partition plate 4 extending axially along the base 2 toward the grease nipple 3, one end of the partition plate 4 abutting against the inner wall of the grease nipple 3 in the width direction, and the other end having a gap with the inner wall of the grease nipple 3; an adjusting plate 5 axially disposed on the inner wall of the grease nipple 3, the length of which is not less than the length of the partition plate 4, and the... When the adjusting plate 5 abuts against the isolation plate 4, it is suitable for sealing the gap between the isolation plate 4 and the inner wall of the grease nipple 3. Before grease injection, the grease nipple 3 drives the adjusting plate 5 to rotate 180°, and the adjusting plate 5 pushes the grease on one side of the isolation plate 4 to flow to the other side or to the oil storage cavity in the gantry 1. During grease injection, the grease nipple 3 rotates in the opposite direction to reset until the adjusting plate 5 abuts against the isolation plate 4, and the grease gun 8 is inserted into the grease nipple 3 and flows to the oil storage cavity through the isolation plate 4. After the grease is full, the newly injected grease pushes the grease residue from the previous grease injection in the grease nipple 3 to overflow from the second flow channel.

[0043] At least one embodiment provides a method for operating a grease fitting for a forklift 7, the method comprising: Before oiling, the oiling nozzle 3 drives the adjusting plate 5 to rotate 180°, and the adjusting plate 5 pushes the grease in the second chamber 35 to flow into the first chamber 34 or into the oil storage chamber in the gantry 1. During oil filling, the oil filling nozzle 3 rotates in the reverse direction to reset so that the adjusting plate 5 abuts against the isolation plate 4, the grease gun 8 is inserted into the oil filling nozzle 3, and the new grease flows through the side wall of the isolation plate 4 to the oil storage chamber. After the grease is filled, the newly injected grease pushes the grease residue from the previous injection in the grease injector 3 outward from the second flow channel.

[0044] At least one embodiment provides a forklift, wherein the mast 1 is disposed at the front of the forklift 7.

[0045] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0046] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0047] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A grease fitting for forklifts, characterized in that, include: The base (2) is embedded in the gantry (1) and is connected to the oil storage chamber in the gantry through the first flow channel (20); The oil nozzle (3) is rotatably mounted on the base (2) and has a second flow channel inside that communicates with the first flow channel (20); The isolation plate (4) extends axially along the inner wall of the base (2) into the oil injection nozzle (3); The sidewall of the isolation plate (4) along its length is fixed to the inner wall of the base (2), and the oil nozzle (3) is divided into a first chamber (34) and a second chamber (35) that are interconnected. The adjusting plate (5) has its sidewall fixed to the inner wall of the oil nozzle (3) along its length and extends axially into the base (2). Its axial length is not less than the axial length of the isolation plate (4). When the adjusting plate (5) is parallel to and fits against the isolation plate (4), it is suitable for isolating the first chamber (34) and the second chamber (35) inside the oil injector (3); Before oil injection, the oil injection nozzle (3) drives the regulating plate (5) to rotate 180°, and the regulating plate (5) pushes the grease in the second chamber (35) to flow to the first chamber (34) or to the oil storage chamber in the gantry (1); When injecting oil, the oil nozzle (3) is rotated in the opposite direction to reset until the adjusting plate (5) and the isolation plate (4) abut against each other. The grease gun is inserted into the oil nozzle (3) and flows to the oil storage chamber through the isolation plate (4). After the oil storage chamber is filled with grease, the grease that is continuously injected pushes the grease remaining from the previous injection in the oil nozzle (3) to overflow from the first chamber (34).

2. The forklift grease fitting as described in claim 1, characterized in that, The ratio of the width of the isolation plate (4) to the diameter of the second flow channel is 0.8-0.9:

1.

3. The forklift grease fitting as described in claim 2, characterized in that, The adjusting plate (5) extends axially into the first flow channel (20) along the inner wall of the oil nozzle (3), and the ratio of the width of the adjusting plate (5) to the diameter of the second flow channel is 0.3-0.4:

1.

4. The forklift grease fitting as described in claim 1, characterized in that, The outer end of the isolation plate (4) is provided with a guide plate (41), which is arc-shaped, and the two ends of the guide plate (41) in the width direction respectively abut against the inner wall of the second flow channel; The guide plate (41) is used to guide the newly injected grease through the second chamber (35) to the oil storage chamber in the gantry (1).

5. The forklift grease fitting as described in claim 1, characterized in that, A conical hole (31) is provided at the outer end of the oil injection nozzle (3), which passes through the oil injection nozzle (3); A sealing steel ball (32) is installed inside the conical hole (31) and is adapted to open and close the conical hole (31).

6. The forklift grease fitting as described in claim 5, characterized in that, The inner wall of the oil nozzle (3) is provided with a reset spring (33), which extends axially in a trumpet shape and is used to push the sealing steel ball (32) to close the conical hole (31).

7. The forklift grease fitting as described in claim 1, characterized in that, A sealing element (6) is fitted at the connection between the outer wall of the base (2) and the gantry (1), and the end wall of the sealing element (6) abuts against the end wall of the oil nozzle (3).

8. The forklift grease fitting as described in claim 7, characterized in that, The seal (6) includes: A sealing disc (61) extends radially along the base (2); A sealing ring (62) is perpendicular to the sealing disc (61) and is integrally formed. The sealing ring (62) is adapted to be inserted into the connection gap between the outer wall of the base (2) and the frame (1).

9. A grease fitting for forklifts, characterized in that, include: The base (2) is embedded in the gantry (1), and its interior is hollow and connected to the oil storage chamber in the gantry (1); Rotate the oil nozzle (3) located on the base (2) so that it is connected to the oil storage chamber; An isolation plate (4) is provided inside the base (2). The isolation plate (4) extends axially along the base (2) toward the oil nozzle (3). One end of the isolation plate (4) in the width direction abuts against the inner wall of the oil nozzle (3), and the other end has a gap with the inner wall of the oil nozzle (3). An adjusting plate (5) is axially arranged on the inner wall of the oil injector (3), the length of which is not less than the length of the isolation plate (4), and the adjusting plate (5) is suitable for sealing the gap between the isolation plate (4) and the inner wall of the oil injector (3) when it abuts against the isolation plate (4); Before oil injection, the oil injection nozzle (3) drives the regulating plate (5) to rotate 180°, and the regulating plate (5) pushes the grease on one side of the isolation plate (4) to flow to the other side or to the oil storage chamber inside the gantry (1); When injecting oil, the oil nozzle (3) is rotated in the opposite direction to reset until the adjusting plate (5) and the isolation plate (4) abut against each other. The grease gun is inserted into the oil nozzle (3) and flows to the oil storage chamber through the isolation plate (4). After the grease is filled, the newly injected grease pushes the grease residue from the previous injection in the grease injector (3) to overflow from the second flow channel.

10. The forklift grease fitting as described in claim 9, characterized in that, The outer end of the isolation plate (4) is provided with a guide plate (41), which is arc-shaped, and the two ends of the guide plate (41) in the width direction respectively abut against the inner wall of the oil injection nozzle (3); The guide plate (41) is used to guide the newly injected grease to flow through the isolation plate (4) to the oil storage chamber.

11. A method for operating a grease fitting for a forklift, characterized in that, The forklift grease fitting as described in any one of claims 1-10 is used, and the working method includes: Before oiling, the oiling nozzle (3) drives the regulating plate (5) to rotate 180°, and the regulating plate (5) pushes the grease in the second chamber (35) to flow into the first chamber (34) or into the oil storage chamber in the gantry (1); When injecting oil, the oil nozzle (3) rotates in the reverse direction to reset so that the adjusting plate (5) abuts against the isolation plate (4), the grease gun is inserted into the oil nozzle (3), and the new grease flows through the side wall of the isolation plate (4) to the oil storage chamber; After the grease is filled, the newly injected grease pushes the grease residue from the previous injection in the grease injector (3) to overflow from the second flow channel.

12. A forklift, characterized in that, The forklift grease fitting described in any one of claims 1-10 is used. The mast (1) is located at the front of the forklift.

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