An integrated grease gun dust cap and grease gun
Patent Information
- Application Number
- CN202522069719.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-25
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-09-25
AI Technical Summary
[0004]本实用新型提供一种一体式黄油枪防尘帽和黄油枪，以解决黄油枪使用中注油嘴暴露性污染、防尘配件易脏污与易丢失、防尘操作低效等技术问题
[0026]本实用新型的有益效果：本实用新型提出的一种一体式黄油枪防尘帽与黄油枪，通过弹性复位组件连接固定基座与防尘帽主体，驱动其沿枪管轴向滑动，实现防尘帽主体在覆盖注油嘴的密封位(第一位置)与回缩至枪管根部的避让位(第二位置)间的自动切换，提升操作效率；
Smart Images
Figure CN224871869U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of grease gun technology, and in particular to an integrated grease gun dust cap and grease gun. Background Technology
[0002] As a core piece of equipment for mechanical lubrication and maintenance, grease guns are widely used for the precise application of grease to moving parts such as bearings, gears, and hinges. By periodically injecting grease into friction pairs, they significantly reduce the coefficient of friction, inhibit wear and deterioration, and form a sealing barrier to block environmental dust and delay metal corrosion, playing a crucial role in ensuring the long-term operation of equipment.
[0003] However, a common defect in high-standard settings such as nuclear power plants in China is the lack of dustproof structures on grease gun nozzles, causing residual grease to be directly exposed to the working environment. Dust, grit, and other contaminants can easily penetrate the residual grease, not only contaminating the lubricating medium and leading to decreased friction-reducing performance and accelerated abnormal equipment wear, but also potentially clogging the nozzle flow channel, causing abnormally high injection pressure and inducing overpressure damage to the grease gun. To temporarily address this issue, grease gun nozzles are usually wrapped in foreign object protection bags. However, this measure creates new technical challenges: firstly, the surface of the bags easily absorbs environmental contaminants, which can transfer to the nozzle during disassembly, causing secondary contamination; secondly, the bags removed during use may be left in equipment chambers, posing a potential safety hazard in fields with stringent foreign object control, such as nuclear power plants; and thirdly, the bags become significantly dirty after prolonged contact with grease and dust, affecting both the aesthetics of the equipment and increasing maintenance burden. Utility Model Content
[0004] This utility model provides an integrated dust cap for a grease gun and a grease gun to solve technical problems such as exposed contamination of the grease nozzle, easy dirt and loss of dustproof accessories, and inefficient dustproof operation during the use of grease guns.
[0005] This utility model provides an integrated dust cap for a grease gun, comprising:
[0006] A fixed base is fixedly installed on the end of the grease gun barrel near the barrel;
[0007] The dust cap body is slidably fitted onto the outside of the gun barrel;
[0008] An elastic reset component, one end of which is connected to the fixed base and the other end of which is connected to the dust cap body;
[0009] The elastic reset component is configured to drive the dust cap body to move to a first position covering the oil nozzle when stretched, and to automatically retract the dust cap body to a second position at the root of the barrel when released.
[0010] In one embodiment of the present invention, the fixed base includes an annular outer shell, which is interference-fitted with the gun barrel, and its interior defines a receiving cavity.
[0011] In one embodiment of the present invention, the elastic reset component includes:
[0012] An automatic winding section is disposed within the receiving cavity;
[0013] The traction part has its storage end fixed to the automatic winding part, and its free end extends out of the outer shell and is connected to the dust cap body;
[0014] The automatic winding unit is configured to provide a tensile traction force to hold the dust cap body in a first position and a retraction force to drive the dust cap body back to a second position.
[0015] In one embodiment of the present invention, the elastic reset component includes an elastic traction member, one end of which is fixed to the fixed base and the other end is connected to the dust cap body;
[0016] The elastic traction member is configured to pull the dust cap body to the first position when stretched, and to retract the dust cap body to the second position when naturally contracted.
[0017] In one embodiment of the present invention, the dust cap body includes a base portion, a cap portion and a connecting portion. The base portion is sleeved on the outside of the gun barrel, and the cap portion is connected to the base portion through the connecting portion.
[0018] In one embodiment of the present invention, the inner wall of the base portion is provided with an annular limiting flange, the inner diameter of which is smaller than the outer diameter of the root flange of the oil nozzle.
[0019] In one embodiment of the present invention, the base portion is provided with a first threaded structure at one end facing the cap portion, and the cap portion is provided with a matching second threaded structure. The cap portion and the base portion are screwed together by the threads to form a closed chamber that seals the oil injector.
[0020] In one embodiment of the present invention, the elastic reset component is configured such that its maximum extension length is greater than the length of the barrel, and its natural state positions the dust cap body in the second position.
[0021] In one embodiment of the present invention, a length adjuster is further provided at the end of the elastic reset component connected to the dust cap body to adjust the connection position between the elastic reset component and the dust cap body.
[0022] This utility model also provides a grease gun, comprising:
[0023] The grease gun body includes a barrel, a handle disposed on the barrel, a gun barrel disposed at the end of the barrel, and an grease nozzle disposed at the end of the gun barrel;
[0024] An integrated grease gun dust cap as described in any of the above embodiments;
[0025] In the non-working state, the dust cap body covers and seals the oil filling nozzle. In the working state, the dust cap body is positioned at the connection between the gun barrel and the gun barrel.
[0026] The beneficial effects of this utility model are as follows: The integrated dust cap and grease gun proposed in this utility model connect the fixed base and the dust cap body through an elastic reset component, and drive it to slide along the barrel axis to realize the automatic switching between the sealing position (first position) covering the grease nozzle and the clearance position (second position) retracted to the root of the barrel, thereby improving the operating efficiency.
[0027] The split threaded sealing structure of the base and the cap, together with the limiting flange and other structures, form a reliable and stable seal, completely blocking the intrusion path of pollutants.
[0028] The fixed base connects to the gun barrel and is connected to the dust cap body through an elastic reset component. The connecting part is linked to the split cover. The integrated connection structure eliminates the risk of accessories falling off or being lost. Combined with the oil-resistant rubber material of the dust cap, it reduces the risk of contamination of the dust accessories themselves and improves the aesthetics.
[0029] By adapting the integrated dust cap of the grease gun to the main structure of the grease gun, the problems of poor dustproof sealing, difficulty in foreign object control, poor aesthetics, and complicated dustproof operation in the field application of grease guns are solved, providing an effective solution for dustproof work of grease guns on site. Attached Figure Description
[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.
[0031] In the attached diagram:
[0032] Figure 1 This is a schematic diagram of the structure of an integrated grease gun dust cap provided in an embodiment of the present invention;
[0033] Figure 2 This is a front view of the cap portion of an integrated grease gun dust cap provided in one embodiment of the present invention.
[0034] Figure 3 This is a top view of the cap portion of an integrated grease gun dust cap provided in one embodiment of the present invention.
[0035] Figure 4 This is a front view of the base portion of the integrated grease gun dust cap provided in one embodiment of the present invention;
[0036] Figure 5 This is a top view of the base of an integrated grease gun dust cap provided in one embodiment of the present invention.
[0037] The attached figures are labeled as follows:
[0038] 100. Fixed base; 200. Elastic reset assembly; 300. Dust cap body;
[0039] 110. Receiving cavity; 310. Base part; 320. Cap part; 330. Connecting part. Detailed Implementation
[0040] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.
[0041] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.
[0042] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.
[0043] Traditional grease gun nozzles lack a dedicated dustproof structure, allowing dust and contaminants to easily penetrate residual grease, leading to lubrication failure, equipment wear, and the risk of nozzle blockage. Some sites use foreign object protection bags for temporary protection, but these have drawbacks such as secondary pollution, dustproof accessories easily falling off and becoming foreign objects, and poor aesthetics.
[0044] Please see Figures 1 to 5 This utility model proposes an integrated dust cap for a grease gun, comprising a fixed base 100, an elastic reset component 200, and a dust cap body 300. The fixed base 100 is fixedly installed on the end of the grease gun barrel near the barrel. The dust cap body 300 is slidably fitted onto the outside of the barrel. One end of the elastic reset component 200 is connected to the fixed base 100, and the other end is connected to the dust cap body 300. The elastic reset component 200 is configured to drive the dust cap body 300 to a first position covering the grease nozzle when stretched, and automatically retract the dust cap body 300 to a second position at the root of the barrel when released. Through the telescopic characteristics of the elastic reset component 200 and the sliding cooperation of the dust cap body 300, the function of sealing and protecting when idle and automatically avoiding obstruction when in use is achieved. The elastic reset component 200 provides bidirectional position control force: when stretched, it needs to overcome its elastic resistance to move the dust cap body 300 to the oil filling nozzle. After it is in place, the elastic reset component 200, the fixed base 100 and the dust cap body 300 work together to achieve a stable seal at the oil filling nozzle. After release, the retraction force drives the dust cap body 300 back to the non-working area, working with the fixed base 100 to ensure stable positioning and not affect the operator's normal use.
[0045] Please see Figures 1 to 5 This utility model's integrated dust cap for grease guns features a simple structure, convenient operation, and good applicability. It can be used as a common dustproof accessory for grease gun nozzles on the market, effectively solving the problem of dust, grit, and other contaminants contaminating residual grease on the nozzle, affecting lubrication performance and leading to equipment wear, or contaminants clogging the nozzle, causing increased injection pressure and ultimately damaging the grease gun due to overpressure. Furthermore, the dust cap's design effectively prevents contamination, ensuring aesthetics while preventing it from becoming a foreign object. The integrated dust cap onto the grease gun prevents the loss of dustproof accessories, avoids leaving foreign objects on-site, and eliminates tedious manual operations, improving safety and operational efficiency in demanding scenarios such as nuclear power plants.
[0046] Please see Figures 1 to 5In an optional embodiment of this utility model, the fixing base 100 includes an annular outer shell, which is interference-fitted with the gun barrel, and its interior defines a receiving cavity 110. The outer shell is preferably made of rigid carbon fiber material, which provides high strength and corrosion resistance, ensuring the long-term stability of the fixing base 100 in a grease environment. Its overall shape is annular, with an inner diameter slightly larger than the outer diameter of the gun barrel for stable installation on the barrel. The interference fit eliminates relative slippage, facilitating installation and preventing displacement caused by vibration. The receiving cavity 110 provides a sealed storage space for the subsequent elastic mechanism, preventing grease intrusion and affecting mechanical performance. During installation, the handle of the grease gun is unscrewed from the gun barrel, the fixing base 100 is fitted onto the gun barrel, and the handle is reattached to complete the fixation. It is understood that the fixing base 100 only needs to be able to fix to the gun body and work in conjunction with the elastic reset component 200 and the dust cap to achieve fixation at different working positions; its structure is not limited. In other embodiments, the fixing base 100 can also use a split clamp structure or similar to achieve fixation with the gun barrel.
[0047] Please see Figures 1 to 5 In an optional embodiment of this utility model, the elastic reset assembly 200 includes an elastic traction member. One end of the elastic traction member is fixed to the fixed base 100, and the other end is connected to the dust cap body 300. The elastic traction member is configured to pull the dust cap body 300 to a first position when stretched, and to retract the dust cap body 300 to a second position when naturally contracted. Specifically, the elastic traction member is, for example, a retractable elastic steel wire rope, and the fixed base 100 is an elastic steel wire rope box, which stores the elastic steel wire rope inside. The expansion and contraction of the elastic steel wire rope realizes the sliding and positioning of the dust cap body 300, while the bending stiffness of the elastic steel wire rope ensures the axial movement accuracy and avoids interference with the gun barrel.
[0048] Please see Figures 1 to 5In another optional embodiment of this utility model, the elastic reset assembly 200 includes an automatic winding section and a traction section. The automatic winding section is disposed within the receiving cavity 110, and the traction section includes a receiving end and a free end. The receiving end is fixed to the automatic winding section, and the free end extends out of the outer shell and connects to the dust cap body 300. The automatic winding section is configured to provide a tensile traction force to hold the dust cap body 300 in a first position and to provide a retraction force to drive the dust cap body 300 back to a second position. Specifically, the automatic winding unit includes a coil spring and a winding wheel disposed in the receiving cavity 110 of the fixed base 100. The traction component is, for example, a steel wire rope, which is wound around the winding wheel and its free end is connected to the dust cap body 300. The preload of the coil spring causes the winding wheel to normally wind the steel wire rope, pulling the dust cap body 300 to the second position. When the dust cap body 300 is manually stretched to the first position, the coil spring stores energy to generate elastic resistance against stretching. After reaching the position, the coil spring torque is converted into a holding force to prevent displacement, thus achieving precise position control. After release, the coil spring releases energy to drive the winding wheel to rotate, and when the steel wire rope is retracted, it drives the dust cap body 300 to reset. The structure has high reliability.
[0049] Please see Figures 1 to 5 In an optional embodiment of this utility model, the elastic reset component 200 is configured such that its maximum extension length is greater than the length of the barrel, and its natural state positions the dust cap body 300 in the second position. The fixed base 100 is fixed to the top of the barrel, and the dust cap body 300 is connected to the fixed base 100 via the elastic reset component 200. The dust cap body 300 is fitted onto the barrel. When the grease gun is idle, the dust cap body 300 is pulled along the barrel to the first position, i.e., the grease nozzle, by controlling the stretching of the elastic reset component 200. When the grease gun is in use, the pre-tightening force of the elastic reset component 200 in its natural state keeps the dust cap body 300 constantly in the second position, ensuring that the position of the dust cap body 300 does not affect the operator's normal use; the movement trajectory of the dust cap body 300 is parallel to the barrel axis, avoiding jamming. The length redundancy of the elastic reset component 200 compensates for installation tolerances, ensuring reliable positioning.
[0050] Please see Figures 1 to 5 In an optional embodiment of this utility model, a length adjuster is also provided at the end where the elastic reset component 200 is connected to the dust cap body 300 to adjust the connection position between the elastic reset component 200 and the dust cap body 300. The length adjuster can be, for example, a snap-fit structure or a threaded fine adjuster, to avoid positioning deviation caused by installation errors. By changing the effective length of the wire rope, it can also be adapted to different models of gun barrels, improving versatility.
[0051] Please see Figures 1 to 5In an optional embodiment of this utility model, the dust cap body 300 includes a base portion 310, a cap portion 320, and a connecting portion 330. The dust cap body 300 can be made of oil-resistant rubber material, which is lightweight and does not cause additional burden. The base portion 310 is sleeved on the outside of the gun barrel, and the cap portion 320 is connected to the base portion 310 as a whole through the connecting portion 330, which can be, for example, a rubber band. It is understood that the cap portion 320 and the base portion 310 are separate structures. In the first position, the cap portion 320 and the base portion 310 can be connected and fixed to seal the oil filling nozzle. In the second position, the base portion 310 and the cap portion 320 are separated, and the connecting portion 330 connects the dust cap body 300 into a whole structure, avoiding the loss of parts and not affecting the fixing operation of the cap portion 320 and the base portion 310. When the grease gun is in use, the cap 320 separates from the base 310, with the base 310 resting at the root of the barrel. The connecting part 330 suspends the cap 320 below the root of the barrel, keeping the cap 320 at a safe distance from the working surface and away from the grease filling area and oil splash area. At the same time, the oleophobic properties of the oil-resistant rubber surface effectively reduce the probability of contamination of the dust cap body 300 and prevent contamination of the gun barrel. Furthermore, the cap 320 does not come into contact with the inner wall of the dust cap body 300 during the connection or separation of the cap and base 310, achieving contactless contamination prevention.
[0052] Please see Figures 1 to 5 In an optional embodiment of this utility model, the end of the base portion 310 facing the cap portion 320 is provided with a first threaded structure, and the cap portion 320 is provided with a matching second threaded structure. The end of the cap portion 320 away from the second threaded structure is a closed structure, so that when the cap portion 320 and the base portion 310 are screwed together by the threads, a closed chamber for sealing the oil filling nozzle can be formed. Its structural design is similar to that of a bottle mouth and a bottle cap, with the base portion 310 and the cap portion 320 corresponding to the bottle mouth and bottle cap structures respectively, and connected as one unit by the connecting portion 330. During installation, unscrew the barrel, place the base 310 onto the barrel, and then screw the barrel back on. When using the grease gun, the base 310 is tucked into the base of the barrel. When the grease gun is not in use, pull the dust cap body 300 to the grease nozzle, and tighten the cap 320 and base 310 to completely seal the grease nozzle. The threaded structure provides a good fastening effect and is not easy to loosen. It can also ensure a stable and reliable connection under external force and vibration, forming a stable and reliable seal, effectively preventing dust and dirt, and preventing the formation of foreign objects. It should be noted that the structure of the dust cap body 300 is not limited. It can be adapted to the size and structure of the grease nozzle and the barrel, and fixed in the first and second positions to achieve effective protection and convenient storage of the grease nozzle. In other embodiments, the cap 320 and base 310 can also be fixed by means of snap-fit or other connection methods.
[0053] Please see Figures 1 to 5 In an optional embodiment of this utility model, the inner wall of the base portion 310 is provided with an annular limiting flange. The inner diameter of the annular limiting flange is smaller than the outer diameter of the flange at the root of the oil nozzle, so as to prevent the dust cap body 300 from slipping off the nozzle. When the dust cap body 300 slides towards the oil nozzle, the flange contacts the flange to form a mechanical stop, preventing the dust cap body 300 from detaching from the nozzle barrel, facilitating positioning, and simultaneously achieving a seal through the compression of the flange and the flange.
[0054] Please see Figures 1 to 5 In an optional embodiment of this utility model, an annular sealing boss is provided at the end of the cap portion 320 away from the base portion 310. When the cap portion 320 and the base portion 310 are screwed together and sealed, the sealing boss presses against the outlet end face of the oil nozzle. The annular sealing boss can be configured as an elastic element. When the cap portion 320 and the base portion 310 are fixed in the first position, the boss elastically presses against the end face of the oil nozzle, ensuring reliable sealing, high dustproof efficiency, good adaptability, and good stability.
[0055] Please see Figures 1 to 5 This utility model also proposes a grease gun, including a grease gun body and a dust cap. The grease gun body includes a barrel, a handle mounted on the barrel, a nozzle mounted at the end of the barrel, and an injection nozzle mounted at the end of the nozzle. The nozzle and injection nozzle are integrated into a nozzle head for quick connection with the lubrication point. The handle has a built-in pump and lever mechanism to provide power for grease delivery. The barrel holds bulk or pre-packaged grease through a piston-type oil reservoir to support differentiated filling needs. In the non-working state, the dust cap body 300 covers and seals the injection nozzle. In the working state, the dust cap is positioned at the connection between the nozzle and the barrel. The dust cap body 300 is fully connected to the grease gun body through an elastic reset component 200, achieving a design without separate parts and eliminating the source of foreign matter caused by dustproof accessories falling off. The state switching is triggered by loosening the cap 320 with one hand to automatically retract, making operation efficient. The two-stage structure of threaded engagement and sealing boss provides good sealing protection and high dustproof efficiency.
[0056] Please see Figures 1 to 5 When installing the dust cap, first remove the handle at the end of the barrel, then insert the fixing base 100 into the barrel and reinstall the handle. Next, insert the base 310 of the dust cap body 300 into the barrel. Under the retraction force of the elastic reset component 200, it will automatically position itself against the root of the barrel. When the grease gun is not in use, stretch the base 310 to the grease nozzle and tighten the cap 320 to seal it. When using the grease gun, loosen the cap 320, and the dust cap body 300 will automatically retract to the root of the barrel.
[0057] In summary, this utility model's integrated dust cap and grease gun, through the elastic reset component 200, fixed base 100, and slidingly fitted dust cap body 300, allows for position switching of the dust cap body 300, improving operational efficiency and achieving effective contamination prevention without affecting the normal use of the grease gun. The dust cap body 300 uses a threaded seal, facilitating installation and ensuring reliable sealing, effectively improving dust prevention efficiency and extending the service life of the grease nozzle. The dust cap body 300 is made of oil-resistant rubber, making it lightweight and preventing contamination from becoming foreign matter. The slidingly fitted dust cap body 300 cooperates with the fixed base 100 and elastic reset component 200. The fixed base 100 is connected to the fixed base 100 via the elastic reset component 200, and the base portion 310 and cap portion 320 of the dust cap body 300 are connected via the connecting portion 330. The integrated design prevents the loss of accessories, greatly facilitating dust prevention work for grease guns on-site.
[0058] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
[0059] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.
[0060] Throughout this specification, references to "an embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.
[0061] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.
[0062] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.
[0063] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.
[0064] The above description of the embodiments shown in this utility model (including the content set forth in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the utility model to the precise forms disclosed herein. Although specific embodiments and examples of the utility model have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the utility model, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the utility model in accordance with the above description of the embodiments described herein, and such modifications will be within the spirit and scope of the utility model.
[0065] This document has generally described the systems and methods in detail to aid in understanding the present invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention can be practiced without one or more specific details, or using other devices, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.
[0066] Therefore, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the above disclosure, and it should be understood that in some cases, certain features of the present invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms used in the following claims and / or the specific embodiments disclosed as the best mode of carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present invention will be determined only by the appended claims.
Claims
1. A one-piece dust cap for a grease gun, characterized in that, include: A fixed base is fixedly installed on the end of the grease gun barrel near the barrel; The dust cap body is slidably fitted onto the outside of the gun barrel; An elastic reset component, one end of which is connected to the fixed base and the other end of which is connected to the dust cap body; The elastic reset component is configured to drive the dust cap body to move to a first position covering the oil nozzle when stretched, and to automatically retract the dust cap body to a second position at the root of the barrel when released.
2. The integrated dust cap for a grease gun according to claim 1, characterized in that, The fixed base includes an annular outer shell, which is interference-fitted with the gun barrel, and its interior defines a receiving cavity.
3. The integrated dust cap for a grease gun according to claim 2, characterized in that, The elastic reset component includes: An automatic winding section is disposed within the receiving cavity; The traction part has its storage end fixed to the automatic winding part, and its free end extends out of the outer shell and is connected to the dust cap body; The automatic winding unit is configured to provide a tensile traction force to hold the dust cap body in a first position and a retraction force to drive the dust cap body back to a second position.
4. The integrated dust cap for a grease gun according to claim 1, characterized in that, The elastic reset assembly includes an elastic traction member, one end of which is fixed to the fixed base and the other end is connected to the dust cap body; The elastic traction member is configured to pull the dust cap body to the first position when stretched, and to retract the dust cap body to the second position when naturally contracted.
5. The integrated dust cap for a grease gun according to claim 1, characterized in that, The dust cap body includes a base, a cap, and a connecting part. The base is fitted over the outside of the gun barrel, and the cap is connected to the base through the connecting part.
6. The integrated dust cap for a grease gun according to claim 5, characterized in that, The inner wall of the base is provided with an annular limiting flange, the inner diameter of which is smaller than the outer diameter of the root flange of the oil nozzle.
7. The integrated dust cap for a grease gun according to claim 5, characterized in that, The base portion has a first threaded structure at one end facing the cap portion, and the cap portion has a matching second threaded structure. The cap portion and the base portion are screwed together by the threads to form a closed chamber that seals the oil injector.
8. The integrated dust cap for a grease gun according to claim 1, characterized in that, The elastic reset component is configured such that its maximum extension length is greater than the length of the barrel, and its natural state positions the dust cap body in the second position.
9. The integrated dust cap for a grease gun according to claim 1, characterized in that, The end of the elastic reset component connected to the dust cap body is also provided with a length adjuster to adjust the connection position between the elastic reset component and the dust cap body.
10. A grease gun, characterized in that, include: The grease gun body includes a barrel, a handle disposed on the barrel, a gun barrel disposed at the end of the barrel, and an grease nozzle disposed at the end of the gun barrel; One-piece grease gun dust cap as described in any one of claims 1 to 9; In the non-working state, the dust cap body covers and seals the oil filling nozzle. In the working state, the dust cap body is positioned at the connection between the gun barrel and the gun barrel.