Grease gun

Abstract

A grease gun, comprising: a barrel body; an end cap provided at one end of the barrel body; an oil discharge channel provided on the end cap and being in communication with the interior and exterior of the barrel body; and a handle that moves relative to the end cap when subjected to a gripping force, the handle being connected to a push rod. The handle moves relative to the end cap when subjected to the gripping force, and, by means of the push rod, a medium in the oil outlet channel is pushed out to the exterior of the barrel body. An adjustment mechanism is provided at the push rod. The adjustment mechanism has at least a first state and a second state, and the amount of the medium in the barrel body pushed out by the push rod in the first state is different from the amount of the medium in the barrel body pushed out by the push rod in the second state.

Description

A butter gun Technical Field

[0001] This invention relates to the field of lubricant extrusion equipment technology, and more particularly to a grease gun. Background Technology

[0002] Grease guns are common tools for maintaining mechanical equipment. By pressing the handle, lubricant is squeezed out and applied to the lubrication points of mechanical equipment to reduce wear on moving surfaces. During use, lubricant is applied by pressing the handle. Grease guns provide pressure to force grease into bearings in different working environments. High and low pressures are available to adapt to different working conditions, and each squeeze of lubricant also requires a different dosage. Conventional grease gun handles cannot be adapted to provide different pressure levels. Summary of the Invention

[0003] In view of the problem mentioned in the background art that the existing grease gun cannot adapt to different working environments, the present invention provides a grease gun that can adjust the dosage of lubricant squeezed in a single application according to different usage needs, and adaptively adjust to meet different pressure requirements, thereby improving the overall flexibility of the device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] Preferably, a grease gun includes: a barrel; an end cap disposed at one end of the barrel; an oil outlet channel disposed on the end cap and connecting the inside and outside of the barrel; a handle that moves relative to the end cap when gripped, and the handle is connected to a push rod. When gripped, the handle moves relative to the end cap and pushes the medium in the oil outlet channel to the outside of the barrel through the push rod. The push rod is provided with an adjustment mechanism, which has at least a first state and a second state. In the first state, the amount of medium pushed out of the barrel by the push rod is different from that in the second state. This application uses gripping the handle to drive the push rod to slide on the end cap, thereby pushing the medium out of the barrel, achieving the technical purpose of increasing lubricant. The handle can be operated with one hand, making it convenient. The adjustment mechanism allows the stroke of the push rod to change during its interaction with the handle, thereby controlling the amount of medium pushed out of the barrel and achieving a gear adjustment effect.

[0006] Preferably, the adjustment mechanism includes an adjustment shaft and a positioning part connected to the adjustment shaft. The push rod is connected to the adjustment shaft, and the handle has several positioning parts. Different positioning parts correspond to different push strokes of the push rod. When the adjustment shaft is locked with different positioning parts, it provides different stroke levels for the push rod. The handle has multiple positioning parts, and the push rod has different sliding strokes when engaged with different positioning parts. Therefore, with a single press, the push rod's pushing pressure and pushing volume of the medium change, improving the adaptability of the grease gun to different applications. The adjustment levels of the grease gun are achieved through the positioning parts. The technical effect corresponding to each level can be clearly defined during the design stage, allowing users to easily select the appropriate level according to the application. This realizes the function of the handle being able to change its connection position to adapt to different usage needs.

[0007] Preferably, the grip includes a first handle, which is rotatably connected to an end cap or connected to the end cap via a connecting rod. A positioning part is disposed on the first handle. In one structural form of the grip, when operating the grip, gripping the operating end of the first handle and applying gripping force will cause the first handle to move. The positioning part is disposed on the first handle, and the first handle is rotatably connected to a connecting rod. When the grip is squeezed, the first handle and the positioning part move together relative to the end cap. The positioning part drives the push rod to move together, realizing the push rod's extension. The grip can be operated with one hand, making it convenient to operate.

[0008] Preferably, a guide path is provided between the positioning parts to allow the adjusting shaft to slide between different positioning parts for adjustment. When the grease gun needs to change the adjustment level, the position of the adjusting shaft can be switched between different positioning parts simply by sliding it along the guide path, making the level adjustment convenient.

[0009] Preferably, the first handle is provided with a mounting plate, and a positioning part and a guide path are disposed on the mounting plate. The mounting plate protrudes from the first handle toward the end cover and limits the shortest distance between the first handle and the end cover when the mounting plate and the end cover abut. The mounting plate is used to install the positioning part and the guide path, providing installation space for the adjusting shaft. At the same time, the mounting plate limits the shortest distance between the first handle and the end cover, that is, regardless of which positioning part the connecting shaft is disposed on, the first handle can only move up to the point where the mounting plate and the end cover abut. Thus, the push stroke of the push rod can be determined by the position of the positioning part on the mounting plate, which facilitates the control of the oil pressure or oil volume of the push rod.

[0010] Preferably, the guide path is a line segment groove or an arc groove, and the width of the guide path groove is smaller than the lateral dimension of the positioning part. The adjusting shaft includes a sliding part that cooperates with the guide path and a locking part that cooperates with the positioning part. Because the width of the guide path groove is smaller than the lateral dimension of the positioning part, when the locking part cooperates with the positioning part, the adjusting shaft cannot move directly from the guide path. The position of the adjusting shaft needs to be adjusted so that the sliding part is located in the positioning part, so that the sliding part can cooperate with the guide path to realize the sliding displacement of the adjusting shaft and ensure the reliability of the grease gun gear adjustment.

[0011] Preferably, the adjusting shaft includes an adjusting end, a sliding part, and a locking part arranged sequentially. The sliding part is dimensionally matched with the guide path, and the locking part is shaped and dimensionally matched with the positioning part. The locking part is larger than the sliding part. The sliding part is provided with an elastic element that pushes the adjusting shaft out of the adjusting end by elastic force to maintain the engagement between the locking part and the positioning part. In this structural form of the adjusting shaft, the locking part and the positioning part can maintain a relatively stable engagement under the elastic force of the elastic element. When it is necessary to change the adjustment level, the adjusting end needs to be pressed to make the adjusting shaft slide against the elastic force of the elastic element. At this time, the locking part disengages from the positioning part, and then the adjusting shaft can switch positions at different positioning parts by engaging the sliding part with the guide path. The stability of each adjustment level is high after it is in place.

[0012] Preferably, the locking part has a protrusion or a recess to limit its rotation. The shapes and sizes of the locking part and the positioning part are matched, that is, after the protrusion or recess is provided on the locking part, the positioning part has a shape that matches it. The locking part cannot rotate, and the adjusting shaft cannot move or rotate radially after being installed on the positioning shaft, resulting in high reliability in positioning.

[0013] Preferably, the locking part is rotatably disposed within the positioning part, and the locking part has a notch to form a sliding surface. The locking part rotates within the positioning part to make the sliding surface engage with the guide path. To unlock the locking part from the positioning part, the locking part must first be rotated. The locking part can only slide along the guide path when the sliding surface engages with the guide path, resulting in high reliability after the locking part and positioning part are properly engaged.

[0014] Preferably, the handle or adjusting shaft is equipped with a reset element. When the handle is subjected to gripping pressure, it overcomes the elastic force of the reset element and moves relative to the end cap. The reset element provides elasticity to the handle, giving the handle a tendency to move in the opposite direction to the direction of movement during gripping. When not gripping, this provides space for the medium in the oil outlet channel to enter, ensuring continuous oil pushing during continuous gripping.

[0015] Preferably, the end cap facing inwards from the cylinder body has a storage trough, and the oil outlet channel includes an inlet end, a push rod hole, and an outlet end arranged sequentially. The inlet end is connected to the storage trough, and the push rod is slidably connected to the push rod hole. When the push rod is working, it pushes the medium from the inlet end along the push rod hole to the outlet end. In one implementation of the end cap, the storage trough ensures that a large amount of medium is maintained near the inlet end of the oil outlet channel, making the push rod's oil outlet function reliable.

[0016] Preferably, the handle includes a second handle connected to the end cap. Both the first and second handles can be held with one hand, allowing for pressure application or operation of the adjustment mechanism. The second handle is fixedly connected and remains stationary during use. It is closer to the end cap and cylinder than the first handle, enabling one-handed operation by simultaneously holding both handles. Specifically, this avoids the need for one hand to hold the cylinder while the other operates the first handle. By squeezing with one hand, the first handle is moved closer to the second handle, allowing for the extrusion of the medium from the cylinder with one hand. Furthermore, the gear adjustment can be achieved by holding the cylinder with one hand and controlling the thumb to move the adjustment shaft. During adjustment, the relative movement of the first and second handles can be achieved through gripping and retracting or by relying on the spring-loaded self-resetting effect of the push rod. These methods improve operational flexibility and convenience.

[0017] Preferably, the handle includes a handle body and a handle sleeve that nests with the handle body, the handle sleeve being movably connected to the handle body. Because the handle sleeve is a movable structure, it can be adjusted relative to the handle body, changing the overall length of the handle body and the handle sleeve. When the grease gun is in use, the handle sleeve can be adjusted to the extended state, increasing the overall length of the handle, making pressing the handle easier and less strenuous when applying lubricant. When the grease gun is stored, the handle sleeve can be adjusted to nest with the handle body, minimizing the overall length of the handle, thus reducing space occupation and facilitating storage; this achieves the function of changing the overall length of the handle to adapt to different usage needs.

[0018] Preferably, the grip sleeve is slidably connected to the handle body. The grip sleeve can slide on the handle body, either extending beyond the handle body so that the total length of the handle body and grip sleeve is greater than the length of the handle body, or completely overlapping with the grip sleeve so that the total length of the handle body and grip sleeve is equal to the length of the handle body, thereby achieving grip length adjustment.

[0019] Preferably, a locking element is hinged to the end of the handle sleeve. One end of the locking element has a protrusion, and the handle body has a locking hole that mates with the protrusion. A tensioning element is provided between the locking element and the handle sleeve. Under the action of the tensioning element, the locking element maintains a rotational tendency. When the handle sleeve slides to the position of the locking hole, the protrusion loses its support and gets stuck in the locking hole, thereby preventing the handle sleeve from sliding further, achieving handle sleeve locking and positioning, and maintaining the adjusted handle length.

[0020] Preferably, both the handle body and the handle sleeve have a U-shaped cross-section, with the handle sleeve partially covering the handle body. The outer surface of the handle body fits snugly against the inner surface of the handle sleeve. The fit between the handle body and the handle sleeve forms a nested fit, allowing only axial freedom of movement between the handle body and the handle sleeve, while all other directions are constrained, thus achieving a sliding connection between the handle sleeve and the handle body.

[0021] Preferably, the tensioning element is a torsion spring, which surrounds the locking element's pivot between the locking element and the handle sleeve, with its two ends acting on the handle sleeve and the locking element respectively; or the tensioning element is a top spring, with its two ends abutting against the handle sleeve and the locking element respectively. The elastic force provided by the torsion spring keeps the locking element rotating, so that when the handle sleeve slides to the locking hole position, the locking element automatically engages with the locking hole, locking the handle sleeve. The locking element can rotate relative to the handle sleeve, forming a lever mechanism. The elastic force provided by the top spring keeps the locking element rotating, so that when the handle sleeve slides to the locking hole position, the locking element automatically engages with the locking hole, locking the handle sleeve.

[0022] Preferably, the grip sleeve is hinged to one side of the end of the handle body via a pivot. The grip sleeve is equipped with a pivot that connects to the handle body, and the grip sleeve is hinged to the handle body. By folding / unfolding to different degrees, the grip length can also be adjusted.

[0023] Preferably, the flipping surface of the handle sleeve coincides with or is parallel to the rotating surface of the handle body. The handle sleeve is provided with a stop pin parallel to the pivot, and the handle body is provided with a stop groove that can engage with the stop pin. When the handle sleeve flips until the stop pin engages with the stop groove, it prevents the handle sleeve from flipping further, allowing the handle sleeve to fully unfold and transmit torque.

[0024] Preferably, the flip surface of the grip sleeve is perpendicular to the rotation surface of the handle body. The grip sleeve and the handle body rotate in different rotation surfaces, so pressing the grip does not affect the flipping / folding of the grip sleeve, and when the grip sleeve is fully unfolded and the grip length reaches its maximum, pressing the grip will not cause the overall length of the grip to be compromised.

[0025] Preferably, the handle sleeve includes an inner handle sleeve and an outer handle sleeve, with the outer handle sleeve covering the inner handle sleeve. The inner handle sleeve is a rigid component. The rigidity of the inner handle sleeve allows it to stably maintain its adjusted position and state after sliding or rotating. The outer handle sleeve, which comes into contact with the user's hand, can be made of a relatively soft material to improve user comfort.

[0026] Preferably, the assembly also includes: a connecting rod, the end of which is rotatably connected to a handle; an oil outlet pipe communicating with the cylinder body; a cylinder assembly including the cylinder body, oil outlet pipe, connecting rod, end cap, and handle; and a plug, detachably mounted on the cylinder assembly. The plug can be installed on the cylinder assembly in various detachable ways. During use, it can be directly removed from the cylinder assembly to block the outlet of the oil outlet pipe; when not in use, it can be installed on the cylinder assembly, thus facilitating convenient storage and preventing loss of the plug.

[0027] Preferably, the plug is threaded onto the cylinder assembly. The plug includes a nozzle and a connector at both ends of the axis, with the nozzle fitting to the end of the oil outlet pipe. The cylinder assembly has a connecting hole that threadedly mates with the connector. The plug is threaded onto the cylinder assembly, allowing it to be fixed in place when not in use and securely fastened when needed. This threaded fixation prevents the plug from falling off during use. The connecting hole on the cylinder assembly mates with the connector, facilitating the threaded connection between the plug and the cylinder assembly.

[0028] Preferably, the outer wall of the plug is provided with a knob, and the connector and the plug are respectively located on both sides of the polygonal knob. The knob allows for easy rotation of the plug, making it easy to remove or install the plug on the cylinder assembly.

[0029] Preferably, the connecting rod includes a first connecting rod and a second connecting rod arranged in parallel, and the first and second connecting rods are fixedly connected by a connecting rod connecting part, with a connecting hole provided on the connecting rod connecting part. By placing the plug on the connecting rod connecting part, the connecting rod connecting part is directly exposed on its end face when using a grease gun, making it easy for operators to spot and use the plug. Furthermore, the plug in this application is located on the central axis of the connecting rod connecting part, making the overall structure more aesthetically pleasing.

[0030] Preferably, an end cap is provided at one end of the cylinder body, and a connection hole is located on the end cap. The connection hole on the end cap makes it easy for the user to spot and use the plug.

[0031] Preferably, the connection hole is located on one side of the handle's thickness direction. By placing the connection hole on one side of the handle's thickness direction, new users can easily find and use the plug, making it convenient for them.

[0032] Preferably, the connection hole is located along the length of the handle and near the end face of the oil outlet pipe. By placing the connection hole at the end along the length of the handle, new users can easily find and use the plug, making it convenient for them.

[0033] Preferably, the knob protrudes from the outer wall of the plug, and the cross-section of the knob is polygonal. The polygonal structure not only makes it convenient to turn the knob directly by hand, but also allows the use of tools to turn the knob; for example, the knob has a hexagonal structure, so a hexagonal wrench can be used to turn the knob.

[0034] Preferably, the side wall of the knob is provided with textured surfaces to increase friction. The textured surfaces can increase the friction of the outer side wall of the knob, or a rubber ring can be provided around the knob to facilitate direct hand rotation of the knob.

[0035] The beneficial effects of the present invention are as follows: (1) It can be operated with one hand, which is convenient; it has multiple adjustable gears, and the grease gun can adjust the oil dispensing mode according to the occasion, which is highly universal; the adjustment gear is realized through the positioning part, and the function of the adjustment gear is clear, which is convenient for the actual application of the grease gun; (2) It better takes into account the convenience of use and storage of the grease gun. The handle sleeve can be adjusted relative to the handle body to change the overall length of the handle body and the handle sleeve. When the grease gun is in use, the overall length of the handle can be maximized, making it easier and more convenient to press the handle when applying lubricant; when the grease gun is stored, the overall length of the handle can be minimized, thereby reducing the space occupied by the grease gun and making it easier to store; (3) The plug is connected to the cylinder assembly by a thread. When the plug is not in use, it can be fixed to the cylinder assembly by a thread. When the plug is needed, it can be fixed to the cylinder assembly by a thread. Since the plug is fixed to the cylinder assembly by a thread, there is no need to worry about the plug falling off the cylinder assembly when using it. Attached Figure Description

[0036] Figure 1 is a schematic diagram of a grease gun disclosed in one embodiment of the present invention.

[0037] Figure 2 is a schematic diagram of the side structure of a grease gun according to one embodiment of the present invention.

[0038] Figure 3 is a cross-sectional view at point AA in Figure 2.

[0039] Figure 4 is a schematic diagram of the internal structure of the handle and its adjacent structures in a grease gun according to one embodiment of the present invention.

[0040] Figure 5 is a schematic diagram of the internal structure of the handle and adjustment shaft of a grease gun disclosed in one embodiment of the present invention.

[0041] Figure 6 is a schematic diagram of the internal structure of the handle and adjustment shaft of a grease gun disclosed in the embodiment shown in Figure 5 after switching the adjustment level.

[0042] Figure 7 is a schematic diagram of the internal structure of a grease gun when the first handle and the adjusting shaft are engaged, according to one embodiment of the present invention.

[0043] Figure 8 is a schematic diagram of the guide path in a grease gun according to one embodiment of the present invention.

[0044] Figure 9 is a cross-sectional view of the adjusting shaft in a grease gun according to one embodiment of the present invention.

[0045] Figure 10 is a schematic diagram of the internal structure of a grease gun when the first handle and the adjusting shaft are engaged, according to one embodiment of the present invention.

[0046] Figure 11 is a schematic diagram of the internal structure of the embodiment shown in Figure 10 when the first handle and the adjusting shaft are engaged after the adjusting shaft is adjusted.

[0047] Figure 12 is a schematic diagram of the internal structure of a grease gun when the first handle and the adjusting shaft are engaged, according to one embodiment of the present invention.

[0048] Figure 13 is a schematic diagram of the internal structure of a grease gun disclosed in one embodiment of the present invention.

[0049] Figure 14 is a partial enlarged view of the first handle in Figure 13.

[0050] Figure 15 is a schematic diagram of one structure of the present invention.

[0051] Figure 16 is a schematic diagram of a longitudinal cross-sectional structure of the present invention.

[0052] Figure 17 is an exploded view of one of the grip components in this invention.

[0053] Figure 18 is a schematic diagram of a mating structure between the grip body and the inner handle sleeve in this invention.

[0054] Figure 19 is a schematic diagram of the cooperation structure between the handle body and the locking component in this invention.

[0055] Figure 20 is a schematic diagram of the state of the handle when it is folded in Embodiment 11 of the present invention.

[0056] Figure 21 is a schematic diagram of the state when the handle is unfolded in Embodiment 11 of the present invention.

[0057] Figure 22 is a schematic diagram of the state when the handle is unfolded in Embodiment 12 of the present invention.

[0058] Figure 23 is a schematic diagram of the state of the handle when it is folded in Embodiment 12 of the present invention.

[0059] Figure 24 is a front view of Embodiment 13 of the present invention.

[0060] Figure 25 is a top view of Embodiment 13 of the present invention.

[0061] Figure 26 is a structural schematic diagram of the connecting rod of the present invention.

[0062] Figure 27 is a top view of the plug of the present invention installed on the end cap.

[0063] Figure 28 is a front view of Embodiment 15 of the present invention.

[0064] Figure 29 is a top view of Embodiment 15 of the present invention.

[0065] Figure 30 is a front view of Embodiment 16 of the present invention.

[0066] In the diagram: 1. Cylinder body; 2. End cap, 21. Material storage trough, 22. Oil outlet channel, 221. Inlet end, 222. Push rod hole, 223. Outlet end, 224. First hole, 225. Second hole; 3. Piston; 4. Rod; 5. Cover; 6. Spring; 7. Handle, 71. Second handle, 72. First handle, 721. First protrusion, 722. Mounting plate, 723. Positioning part, 7231. First positioning part, 7232. Second positioning part, 724. Guide path, 73. Connecting rod, 731. First connecting rod, 732. Second connecting rod, 733. Connecting rod connection part, 734. Connecting rod end hole, 74. Reset part, 75. Limiting part, 76. Mating pin; 8. Push rod, 81. Adjusting shaft, 811. Adjusting end, 812. Sliding part, 813. Locking part, 8130. Sliding surface, 8131. Protrusion, 814. Elastic element, 815. Protective sleeve; 91 Handle body, 911 Locking hole, 912 Stop groove, 92 Handle sleeve, 921 Stop pin, 922 Inner handle sleeve, 923 Outer handle sleeve, 93 Locking element, 931 Protrusion, 94 Torsion spring, 95 Rotating shaft, 96 Locking element rotating shaft, 97 Pressing arm, 98 Locking element stop pin, 99 Step; 10 Plug, 101 Plug, 102 Connector, 103 Knob, 104 Connecting hole; 11 Oil outlet pipe. Detailed Implementation

[0067] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0068] Example 1: A grease gun, as shown in Figures 1 to 13, includes a barrel 1, an end cap 2, and a handle 7. The end cap 2 is fixed to one end of the barrel 1 and has an oil outlet channel 22 connecting the inside and outside of the barrel 1. The handle 7 is connected to a push rod 8. When the handle 7 is subjected to gripping pressure, it moves relative to the end cap 2 and pushes the medium in the oil outlet channel 22 to the outside of the barrel 1 through the push rod 8. The push rod 8 is connected to an adjusting shaft 81. The handle 7 has several positioning parts 723. Different positioning parts 723 correspond to different strokes of the push rod 8. When the adjusting shaft 81 is locked with different positioning parts 723, it provides different stroke levels for the push rod 8.

[0069] This application utilizes the grip 7 to drive the push rod 8 to slide within the end cap 2, thereby pushing the medium out of the cylinder 1, achieving the technical purpose of adding lubricant to the target location. The medium is typically grease. The cylinder 1 is used to store the medium. For example, as shown in Figure 13, a piston 3 is slidably installed inside the cylinder 1. The medium is disposed inside the cylinder 1 between the piston 3 and the end cap 2. A rod 4, which can be a rope or chain, is connected to the side of the piston 3 facing away from the end cap 2. The end cap 2 is threaded to one end of the cylinder 1, and a cover 5 is fixedly connected to the other end of the cylinder 1. The rod 4 passes through the cover 5. A spring 6 abuts between the piston 3 and the cover 5. The spring 6 provides a force to the piston 3 to move towards the end cap 2. When the grease is discharged from the oil outlet channel 22 of the end cap 2, the grease between the end cap 2 and the piston 3 decreases. The spring 6 cooperates to push the piston 3 upward so that the space between the end cap 2 and the piston 3 shrinks synchronously, ensuring reliable oiling of the oil outlet channel 22. To prevent air from being sucked back into the barrel 1 and affecting the effect of adding grease to the grease gun, when it is necessary to add grease to the barrel 1, the end cap 2 is disassembled from the barrel 1. The piston 3 is driven by the rod 4 to the cap 5 or to the cap 5 to lock. At this time, lubricant can be added to the space inside the barrel 1. After a certain amount of lubricant is added, the end cap 2 is reassembled with the barrel 1. The whole process realizes the replenishment of lubricant.

[0070] The end cap 2 integrates an oil outlet channel 22, which can be connected to a pipeline to achieve oil outlet in different directions. In the scheme shown in Figure 4, the oil outlet channel 22 has two through holes connecting to the outside, namely a first hole 224 and a second hole 225. To adapt to different equipment positions, the first hole 224 and the second hole 225 are selected with different outlets. When one outlet (e.g., the first hole 224) is used, the other outlet (the second hole 225) is closed by a corresponding plug.

[0071] The handle 7 is the operating component of the grease gun. When the grease gun needs to dispense grease, the handle 7 is gripped, and the push rod 8 connected to the handle 7 slides within the grease outlet channel 22. The inlet end 221 of the grease outlet channel 22 is closer to the handle 7 than the outlet end 223. This means that during the push-out process, the push rod 8 moves from the inlet end 221 towards the outlet end 223 of the grease outlet channel 22, thereby dispensing the grease from the grease outlet channel 22. Under the pressure of the spring 6, the grease continuously enters the grease outlet channel 22 from the inlet end 221, ensuring effective grease dispensing with each gripping operation. The handle 7 is operated by hand, allowing for one-handed operation and making it convenient.

[0072] The handle 7 is equipped with multiple positioning parts 723. When the push rod 8 engages with different positioning parts 723, it has different sliding strokes. Therefore, with a single press, the pushing pressure and volume of the medium by the push rod 8 change, improving the adaptability of the grease gun to different applications. For example, when the grease fitting freezes, hindering the flow of lubricant, or when the bearing being lubricated has tight tolerances requiring greater pressure to inject lubricant, the pressure setting of the grease gun corresponding to the positioning part 723 farther from the end cap 2 can be used. A smaller stroke of the handle 7 will expel only a smaller unit of lubricant, which helps overcome resistance. Conversely, in cases where a larger volume of lubricant needs to be injected at once, the volume setting of the grease gun corresponding to the positioning part 723 closer to the end cap 2 can be used. A single press of the handle 7 can expel a larger volume of lubricant, ensuring effective lubrication.

[0073] The adjustment of the grease gun is achieved through the positioning unit 723. The technical effect corresponding to each setting can be clearly defined in the design stage, making it convenient for users to select the appropriate setting according to the usage situation.

[0074] Example 2: A grease gun, as shown in Figures 1 to 6, includes a barrel 1, an end cap 2, and a handle 7. The end cap 2 is fixed to one end of the barrel 1 and has an oil outlet channel 22 connecting the inside and outside of the barrel 1. The handle 7 is connected to a push rod 8. When the handle 7 is subjected to a gripping force, it moves relative to the end cap 2 and pushes the medium in the oil outlet channel 22 to the outside of the barrel 1 through the push rod 8. The outer end of the push rod 8 is rotatably connected to an adjusting shaft 81. The handle 7 has several positioning parts 723. The positioning parts 723 are spaced apart in the axial direction of the push rod 8. When the adjusting shaft 81 is locked with different positioning parts 723, multiple adjustment positions with different sliding strokes of the push rod 8 are formed. To improve the grease gun's oiling effect, the end cap 2 facing the inside of the barrel 1 is provided with a material storage tank 21. The oil outlet channel 22 includes an inlet end 221, a push rod hole 222, and an outlet end 223 arranged in sequence. The inlet end 221 is an oil inlet hole that connects the push rod hole 222 and the material storage tank 21. The inlet end 221 and the material storage tank 21 are interconnected. The push rod 8 is slidably connected to the push rod hole 222. The first hole 224 is located at the outlet end 223. When the push rod 8 is working, it pushes the medium from the inlet end 221 along the push rod hole 222 to the outlet end 223. The push rod 8 and the push rod hole 222 are tightly fitted to ensure the oiling effect of the push rod 8.

[0075] The adjusting shaft 81 is equipped with a reset element 74, which is sleeved on the push rod 8 and abuts against the springs of the adjusting shaft 81 and the end cap 2 respectively. When the handle 7 is subjected to a gripping force, it overcomes the elastic force of the reset element 74 and moves relative to the end cap 2. The reset element 74 provides elastic force to the handle 7, giving the handle 7 a tendency to move in the opposite direction to the direction of gripping. When not gripping, the reset element 74 pushes the push rod 8 outward, providing space for the medium in the oil outlet channel 22 to enter, ensuring continuous oil pushing during continuous gripping.

[0076] In this embodiment, the handle 7 includes a second handle 71 and a first handle 72. The second handle 71 is fixedly connected to the end cap 2, and the first handle 72 is connected to the second handle 71 via a connecting rod 73. The operating ends of the second handle 71 and the first handle 72 are arranged opposite to each other, and a positioning part 723 is provided on the first handle 72. The two ends of the connecting rod 73 are rotatably connected to the second handle 71 and the first handle 72, respectively. When the first handle 72 is pressed, although the first handle 72 tends to rotate relative to the second handle 71, it also slides, so that the positioning part 723 on the first handle 72, which cooperates with the adjusting shaft 81, can be kept on the axis of the push rod 8, thus avoiding interference from the rotation of the first handle 72 on the sliding of the push rod 8. When operating the handle 7, the operating ends of both the second handle 71 and the first handle 72 are held simultaneously. Applying gripping force will cause the first handle 72 and the second handle 71 to move relative to each other. The positioning part 723 is provided on the first handle 72. When the handle 7 is gripped, the first handle 72 and the positioning part 723 move together relative to the end cover 2. The positioning part 723 drives the push rod 8 to move together, realizing the push rod 8 being pushed out. The handle 7 can be operated with one hand, making it convenient to operate.

[0077] To facilitate the switching and adjustment of the adjusting shaft 81 between different positioning parts 723, a guide path 724 is provided between the positioning parts 723. When the grease gun needs to change the adjustment level, simply slide the adjusting shaft 81 along the guide path 724 to switch the position between the different positioning parts 723, making level adjustment convenient. In this embodiment, the first handle 72 is provided with a mounting plate 722, and the positioning parts 723 and the guide path 724 are disposed on the mounting plate 722. The mounting plate 722 protrudes from the first handle 72 toward the second handle 71 and limits the shortest distance between the first handle 72 and the end cap 2 when the mounting plate 722 abuts against the end cap 2. Mounting plate 722 is used to mount positioning part 723 and guide path 724, providing installation space for adjusting shaft 81. At the same time, mounting plate 722 limits the shortest distance between first handle 72 and end cover 2. That is, no matter which positioning part 723 the connecting shaft is set on, the first handle 72 can only move to the point where mounting plate 722 and end cover 2 abut. Thus, the push stroke of push rod 8 can be determined by the position setting of positioning part 723 on mounting plate 722, which facilitates control of oil pressure or oil volume of push rod 8.

[0078] In this embodiment, two positioning parts 723 are provided, and the guide path 724 between the two positioning parts 723 is a line segment groove. The width of the guide path 724 is smaller than the lateral dimension of the positioning part 723. The adjusting shaft 81 includes a sliding part 812 that cooperates with the guide path 724 and a locking part 813 that cooperates with the positioning part 723. Because the width of the guide path 724 is smaller than the lateral dimension of the positioning part 723, when the locking part 813 cooperates with the positioning part 723, the adjusting shaft 81 cannot move directly from the guide path 724. The position of the adjusting shaft 81 needs to be adjusted so that the sliding part 812 is located in the positioning part 723, so that the sliding part 812 can cooperate with the guide path 724 to realize the sliding displacement of the adjusting shaft 81 and ensure the reliability of the grease gun gear adjustment. In this embodiment, the adjusting shaft 81 includes an adjusting end 811, a sliding part 812, and a locking part 813 arranged sequentially. The sliding part 812 is in a cylindrical shape and fits the guide path 724 with a clearance. The locking part 813 and the positioning part 723 have the same shape. The locking part 813 is cylindrical, and the positioning part 723 is a circular hole. The diameters of the locking part 813 and the positioning part 723 are clearance-fitted. The diameter of the locking part 813 is larger than the diameter of the sliding part 812. The sliding part 812 is provided with an elastic element 814 that pushes the adjusting shaft 81 towards the adjusting end 811 by elastic force to maintain the fit between the locking part 813 and the positioning part 723. Specifically, the adjusting end 811 is a screw threaded to the adjusting shaft 81, and the elastic element 814 is a spring. A protective sleeve 815 is provided on the spring to improve the safety of the spring setting. Under the elastic force of the elastic element 814, the locking part 813 and the positioning part 723 can maintain a relatively stable fit. When it is necessary to adjust the gear position, the adjusting end 811 needs to be pressed to make the adjusting shaft 81 slide against the elastic force of the elastic element 814. At this time, the locking part 813 disengages from the positioning part 723. Then, the adjusting shaft 81 can switch positions in different positioning parts 723 by cooperating with the guide path 724 through the sliding part 812. The stability of each adjustment gear position is high.

[0079] Two positioning parts 723 enable the grease gun to have two adjustable settings: pressure mode and volume mode. The line segment groove is eccentrically positioned on the same side of the two positioning parts 723 and features a rounded transition, enhancing the reliability of the fit between the adjusting shaft 81 and the positioning parts 723 while facilitating the movement of the adjusting shaft 81. As shown in Figures 5 and 6, the two positioning parts 723 are the first positioning part 7231 and the second positioning part 7232, respectively. The first positioning part 7231 is closer to the end cap 2 than the second positioning part 7232. In the state shown in Figure 5, the adjusting shaft 81 is positioned at the second positioning part 7232. At this time, the shortest distance between the edge of the mounting plate 722 and the end cap 2 is small, resulting in a smaller rotation distance for the first handle 72. The upper end of the first handle 72 has a first protrusion 721 protruding from the connecting rod 73, which limits the maximum outward rotation angle of the first handle 72. The second handle 71 has a wavy arc surface on the side facing the cylinder 1, which is convenient for fingers to grip. Since the shortest distance between the mounting plate 722 and the end cap 2 of the first handle 72 is small, the first handle 72 can be gripped and pressed at high frequency and quickly, providing a large output pressure to the medium, which is suitable for applications with high medium resistance. In the state shown in Figure 6, the adjusting shaft 81 is set in the first positioning part 7231. At this time, the shortest distance between the edge of the mounting plate 722 and the end cap 2 is larger, and the first handle 72 can rotate a larger distance towards the cylinder 1, thereby pushing the push rod 8 further towards the outlet end 223 of the oil outlet channel 22 compared to the state in Figure 5, realizing the extrusion of a larger volume of medium in a single operation.

[0080] In this embodiment, Figure 3 shows the limiting member 75, which is not shown in Figure 2, of the push rod 8 and the oil outlet channel 22. The limiting member 75 is rotatably mounted on the second handle 71, and the first handle 72 is provided with a mating pin 76. The limiting member 75 can hook onto the mating pin 76. When the limiting member 75 is hooked onto the mating pin 76, the push rod 8 blocks the push rod hole 222 between the inlet end 221 and the outlet end 223 of the oil outlet channel 22 to prevent the grease gun from leaking oil.

[0081] As a simple replacement for the above scheme, the number of positioning units 723 is three, four, etc.

[0082] Example 3: A grease gun, as shown in Figure 7. The only difference between Example 3 and Example 2 is that the guide path 724 is an arc groove.

[0083] Example 4: A grease gun, as shown in Figure 8. The only difference between Example 4 and Example 2 is that the guide path 724 is a straight groove.

[0084] Example 5: A grease gun, as shown in Figure 9. The difference between Example 5 and Example 2 is that the adjusting shaft 81 also has a locking part 813 that can connect with the positioning part 723 on the side near the adjusting end 811. In this example, positioning parts 723 are provided on both sides of the mounting plate 722. Furthermore, the hole diameters of the positioning parts 723 on the two sides of the mounting plate 722 are not the same, so the locking part 813 provided on the side near the adjusting end 811 can actually be an extension of the same size as the sliding part 812 (between the two mounting plates 722). The above arrangement makes the force more uniform.

[0085] Example 6: A grease gun, as shown in Figures 10 and 11. The difference between Example 6 and Example 2 is that the locking part 813 is rotatably disposed within the positioning part 723. The locking part 813 has a notch to form a sliding surface 8130. The locking part 813 rotates within the positioning part 723 to make the sliding surface 8130 engage with the guide path 724. In this example, the notch is planar, making the cross-sectional shape of the sliding surface 8130 D-shaped. To unlock the locking part 813 from the positioning part 723, the locking part 813 must first be rotated, changing the orientation of the notch on the adjusting shaft 81 shown in Figure 10 to the orientation shown in Figure 11. When the sliding surface 8130 engages with the guide path 724, the locking part 813 can slide along the guide path 724, resulting in high reliability after the locking part 813 and the positioning part 723 are properly engaged.

[0086] Furthermore, since in this embodiment, the locking part 813 can be directly rotated within the positioning part 723 to achieve unlocking, as another implementation of the above solution, the sliding part 812 and the locking part 813 adopt the same structure and size and do not have an elastic element 814.

[0087] Example 7: A grease gun, as shown in Figure 12. The difference between Example 7 and Example 2 is that the locking part 813 has a protrusion 8131 to limit the rotation of the locking part 813. Specifically, the locking part 813 has two tooth-shaped protrusions 8131, which are arranged in a circumferential array around the axis of the locking part 813. The shapes and sizes of the locking part 813 and the positioning part 723 are matched. That is, after the protrusions 8131 are set on the locking part 813, the positioning part 723 has a shape that matches the protrusions 8131. The locking part 813 cannot rotate, and the adjusting shaft 81 cannot move or rotate radially after being installed on the positioning shaft, resulting in high reliability in positioning. When it is necessary to unlock, press the adjusting end 811 to make the cylindrical sliding part 812 engage with the positioning part 723, and then the adjusting shaft 81 can be moved along the guide path 724.

[0088] As a simple replacement for the above solution, the locking part 813 is a recess. In this case, the lateral dimension of the locking part 813 corresponding to the recess is still larger than the diameter of the sliding part 812, ensuring that after the locking part 813 is disengaged from the positioning part 723, the sliding part 812 can enter the positioning part 723 and slide in coordination with the guide path 724.

[0089] Example 8: A grease gun, as shown in Figures 13 and 14. The difference between Example 8 and Example 2 is that the locking part 813 is gear-shaped, and the end cap 2 has a protruding end for connecting the connecting rod 73, so that the two ends of the connecting rod 73 are rotatably connected to the end cap 2 and the first handle 72 respectively. The first handle 72 is equipped with a reset member 74, which is a torsion spring that acts on the first handle 72 and the connecting rod 73 respectively.

[0090] Example 9: As shown in Figures 15 to 19, a grease gun includes a barrel 1 and a handle 7. The handle 7 includes a handle body 91 and a handle sleeve 92. The handle sleeve 92 is movably connected to the handle body 91. In this embodiment, the handle sleeve 92 and the handle body 91 are slidably connected and can form a nested fit. The handle sleeve 92 includes an inner handle sleeve 922 and an outer handle sleeve 923. The inner handle sleeve 922 is preferably made of the same material as the handle body 91, and can be a metal part with rigidity. The outer handle sleeve 923 is made of rubber and is wrapped around the inner handle sleeve 922 by overmolding. The handle body 91 is a sheet metal structure, stamped from steel plate, with a U-shaped cross-section. The handle sleeve 92 also has a U-shaped cross-section, partially covering the handle body 91. The outer U-shaped surface of the handle body 91 and the inner U-shaped surface of the handle sleeve 92 fit together, forming a nested fit. A locking element 93 is provided at the front end of the handle sleeve 92. The locking element 93 also has a U-shaped cross-section, with a locking element pivot 96 running through its middle. The locking element pivot 96 passes through the handle sleeve 92, allowing the locking element 93 to be hinged to the handle sleeve 92 via the pivot 96. The locking element pivot 96 rests on the U-shaped cavity opening of the handle body 91. A protrusion 931 is provided at the front end of the locking element 93. The rear section of the locking element 93 after the locking element pivot 96 is a cantilever structure, forming a pressing arm 97. The handle body 91 has three pairs of locking holes 911, which are located on the movement path of the locking member 93 and can engage with the protrusion 931. A tensioning member is provided between the locking member 93 and the handle sleeve 92. Under the action of the tensioning member, the locking member 93 maintains a tendency to rotate around the locking member pivot 96, so that the protrusion 931 always presses against the bottom of the U-shaped cavity of the handle body 91. Through the nesting fit of the inner and outer U-shaped surfaces between the handle body 91 and the handle sleeve 92, and the pressing of the locking member 93, the handle body 91 and the handle sleeve 92 retain only the axial degree of freedom of movement, while all other directions are constrained. In this embodiment, the tensioning element is a torsion spring 94. The torsion spring 94 is installed in the U-shaped cavity of the locking element 93. The middle part of the torsion spring 94 is twisted into a loop and surrounds the rotating shaft 96 of the locking element. One end of the torsion spring 94 abuts against the bottom of the U-shaped cavity of the locking element 93, and the other end is bent into a hook and hooked onto a locking element stop pin 98. The two ends of the locking element stop pin 98 are respectively connected to the side wall of the U-shaped cavity of the handle sleeve 92. The locking element stop pin 98 is located below the pressing arm 97 and rests on the U-shaped cavity opening of the handle body 91. A raised step 99 is provided on the U-shaped cavity opening at the end of the handle body 91. When the locking element 93 slides with the handle sleeve 92 until the locking element stop pin 98 abuts against the step 99, the sliding of the handle sleeve 92 is blocked, and the handle sleeve 92 reaches its unfolding limit.

[0091] When the grease gun is in use, slide the handle sleeve 92 towards the end of the handle body 91 to extend the total length of the handle 7. During the sliding process of the handle sleeve 92, when the handle sleeve 92 slides to the locking hole 911, the protrusion 931 loses its support and gets stuck in the locking hole 911, thereby preventing the handle sleeve 92 from sliding further and locking the handle sleeve 92 in position. This maintains the length of the handle 7 at this position. Since the handle 7 is adjusted to the extended state, the overall length of the handle 7 is increased, making it easier and less effort to press the handle 7 when applying lubricant. The protrusion 931 cooperates with different locking holes 911 to produce different extensions of the handle 7, resulting in different effort-saving effects. Different users can select different locking holes 911 according to their own strength. If the protrusion 931 gets stuck in a non-selected locking hole 911, the pressing arm 97 can be pressed to make the locking member 93 rotate around the locking member pivot 96 and the reverse torsion spring 94, so that the protrusion 931 is moved out of the locking hole 911 and the lock is released. Then continue to slide the handle sleeve 92 until the target position. If the grease gun is not in use, the pressing arm 97 can be pressed to make the protrusion 931 disengage from the bottom of the U-shaped cavity of the handle body 91. Then the handle sleeve 92 can be slid and adjusted to a state where it is fully nested with the handle body 91, so that the overall length of the handle 7 is minimized, thereby reducing space occupation and making it easier to store.

[0092] Example 10: Unlike Example 9, the tensioning element in this example is a top spring, which is installed in the U-shaped cavity of the locking element 93. One end of the top spring abuts against the bottom of the U-shaped cavity of the locking element 93, and the other end abuts against a locking element stop pin 98. The locking element stop pin 98 is a square prism, and its two ends are respectively connected to the side wall of the U-shaped cavity of the handle sleeve 92. The handle sleeve 92 and the locking element stop pin 98 are each provided with a pin, and the two ends of the top spring are respectively sleeved on the two pins. The locking element stop pin 98 is located below the pressing arm 97 and rests on the U-shaped cavity opening of the handle body 91. The U-shaped cavity opening at the end of the handle body 91 is provided with a raised step 99. When the locking element 93 slides with the handle sleeve 92 until the locking element stop pin 98 abuts against the step 99, the sliding of the handle sleeve 92 is blocked, and the handle sleeve 92 reaches its unfolding limit. The rest is the same as in Example 9.

[0093] The operation method is similar to that of Example 9. Different users can select different locking holes 911 according to their own strength. If the protrusion 931 is stuck in a non-selected locking hole 911, the pressing arm 97 can be pressed. The difference is that the locking member 93 rotates around the locking member pivot 96 against the spring force, so that the protrusion 931 moves out of the locking hole 911 and the lock is released. Then continue to slide the handle sleeve 92 until the target position. If the grease gun is not in use, the pressing arm 97 can be pressed to disengage the protrusion 931 from the bottom of the U-shaped cavity of the handle body 91. Then the handle sleeve 92 can be slid and adjusted to a state where it is fully nested with the handle body 91, so that the overall length of the handle 7 is minimized, thereby reducing space occupation and facilitating storage.

[0094] Example 11: As shown in Figures 20 and 21, a grease gun includes a barrel 1 and a handle 7. The handle 7 includes a handle body 91 and a handle sleeve 92. The handle sleeve 92 is movably connected to the handle body 91. Unlike Example 9, in this example, the handle sleeve 92 and the end of the handle body 91 are hinged by a pivot 95. The handle sleeve 92 includes an inner handle sleeve 922 and an outer handle sleeve 923. The inner handle sleeve 922 is preferably made of the same material as the handle body 91, and can be a metal part with rigidity. The outer handle sleeve 923 is made of rubber and is wrapped around the inner handle sleeve 922 by rubber injection molding. The handle body 91 is a sheet metal structure, stamped from steel plate, and its cross-section is U-shaped, with the U-shaped opening facing the barrel 1; the cross-section of the handle sleeve 92 is also U-shaped. Both ends of the pivot 95 penetrate the U-shaped cavity sidewalls of the handle body 91 and the U-shaped cavity sidewalls of the handle sleeve 92. The handle sleeve 92 can rotate around the pivot 95, thus folding or unfolding. When folded, the handle sleeve 92 can partially cover the handle body 91 to form a nested fit, with the outer U-shaped surface of the handle body 91 and the inner U-shaped surface of the handle sleeve 92 fitting together. The flipping surface of the handle sleeve 92 coincides with or is parallel to the rotating surface of the handle body 91, that is, the plane swept by the handle sleeve 92 when it flips coincides with or is parallel to the plane swept by the handle body 91 when the handle 7 is pressed (as shown in Figure 21, the flipping direction of the handle sleeve 92 is as shown by the arrow in the figure, and it can be unfolded in the direction of the arrow or folded in the opposite direction of the arrow; the pressing and resetting direction of the handle body 91 is towards the cylinder 1 or away from the cylinder 1; in the above two processes, the sweeping surface of the handle body 91 coincides with or is parallel to the sweeping surface of the handle sleeve 92). The handle sleeve 92 is provided with a stop pin 921 parallel to the rotating shaft 95. The handle body 91 of the stop pin 921 is provided with a stop groove 912. The position of the stop groove 912 corresponds to the stop pin 921 and can cooperate with the stop pin 921. The cross-section of the stop groove 912 is semi-circular and the diameter is adapted to the diameter of the stop pin 921. The rest is the same as in embodiment 9.

[0095] When the grease gun is in use, the handle sleeve 92 is flipped outward around the pivot 95. When the handle sleeve 92 is flipped until the stop pin 921 engages with the stop groove 912, the handle sleeve 92 and the handle body 91 are in a straight line. Because the stop pin 921 is engaged in the stop groove 912, it is prevented from flipping further. At this point, the handle sleeve 92 is fully extended, and the overall length of the handle 7 is increased. When applying lubricant, pressing the handle sleeve 92 has a longer lever arm than pressing the handle body 91, making it more effortless and convenient. If the grease gun is not in use, the handle sleeve 92 can be flipped in the opposite direction until the bottom of the U-shaped cavity of the handle sleeve 92 fits against the outer surface of the handle body 91. At this point, the handle sleeve 92 is folded into a state where it is fully nested with the handle body 91, minimizing the overall length of the handle 7 and reducing space occupation for easy storage.

[0096] Example 12: As shown in Figures 22 and 23, a grease gun includes a barrel 1 and a handle 7. The handle 7 includes a handle body 91 and a handle sleeve 92. The handle sleeve 92 is movably connected to the handle body 91. Unlike Example 9, in this example, the handle sleeve 92 and the end of the handle body 91 are hinged by a pivot 95. The handle sleeve 92 includes an inner handle sleeve 922 and an outer handle sleeve 923. The inner handle sleeve 922 is preferably made of the same material as the handle body 91, and can be a metal part with rigidity. The outer handle sleeve 923 is made of rubber and is wrapped around the inner handle sleeve 922 by overmolding. The handle body 91 is a solid structure made of steel strip, and its cross-section is oval; while the cross-section of the handle sleeve 92 is U-shaped. The pivot 95 penetrates the U-shaped cavity sidewall of the handle body 91 at its center, and both ends of the pivot 95 penetrate the two sidewalls of the U-shaped cavity of the handle sleeve 92. The handle sleeve 92 can be flipped around the pivot 95, thus folding or unfolding. When folded, the handle sleeve 92 can partially cover the handle body 91 to form a nested fit, and the outer arc-shaped surface of the handle body 91 fits snugly against the inner U-shaped surface of the handle sleeve 92. Unlike embodiment 11, in this embodiment, the axial direction of the pivot 95 is approximately consistent with the pressing force direction of the handle body 91, so that the flipping surface of the handle sleeve 92 is perpendicular to the rotating surface of the handle body 91, that is, the plane swept by the handle sleeve 92 when flipping is perpendicular to the plane swept by the handle body 91 when pressing the grip 7. The rest is the same as in embodiment 11.

[0097] When the grease gun is in use, flip the handle sleeve 92 outward around the pivot 95. When the handle sleeve 92 is flipped to be in a straight line with the handle body 91, it is at its maximum extension. This increases the overall length of the handle 7, making it easier and less strenuous to press the handle sleeve 92 when applying lubricant compared to pressing the handle body 91. Because the handle sleeve 92 and the handle body 91 are in different dimensions of motion, pressing the handle sleeve 92 does not change the angle between them and does not affect their ability to maintain a straight line. When the grease gun is not in use, flip the handle sleeve 92 in the opposite direction until the bottom of its U-shaped cavity is flush against the outer surface of the handle body 91. At this point, the handle sleeve 92 is folded into a fully nested fit with the handle body 91, minimizing the overall length of the handle 7 and reducing space occupation for easier storage.

[0098] Example 13: Referring to Figures 24 to 26, a grease gun includes: a barrel assembly and a plug 10 disposed on the barrel assembly. The barrel assembly includes a barrel body 1, an oil outlet pipe 11, and a connecting rod 73. An end cap 2 is provided at one end of the barrel body 1, and the oil outlet pipe 11 passes through the end cap 2 and communicates with the interior of the barrel body 1; a handle 7 is rotatably connected to the end of the connecting rod 73 away from the barrel body 1.

[0099] The plug 10 is detachably mounted on the cylinder assembly.

[0100] The plug 10 can be installed on the cylinder assembly in a variety of detachable ways. When in use, it can be directly removed from the cylinder assembly to block the outlet of the oil pipe 11. When not in use, it can be installed on the cylinder assembly, which makes it easy to fix and store the plug 10 and prevent the plug 10 from being lost.

[0101] In one embodiment, the plug 10 is connected to the cylinder assembly by a thread. When the plug 10 is not in use, it can be fixed to the cylinder assembly by a thread. When the plug 10 needs to be used, it can be fixed to the cylinder assembly by a thread. Since the plug 10 is fixed to the cylinder assembly by a thread, there is no need to worry about the plug 10 falling off the cylinder assembly during use.

[0102] Of course, in this application, a magnet can also be provided on the plug 10, which can be attracted to the cylinder assembly by the magnet, so that the plug 10 can be detachably installed on the cylinder assembly. This makes it convenient for the magnet to be attracted to various positions on the cylinder assembly.

[0103] In one embodiment, the plug 10 includes a plug 101 and a connector 102 disposed at both ends of the axis. The plug 101 is adapted to the end of the oil outlet pipe 11. The cylinder assembly is provided with a connecting hole 104 that is threadedly engaged with the connector 102. The connector 102 is used to engage with the connecting hole 104 to facilitate the threaded connection between the plug 10 and the cylinder assembly.

[0104] In one embodiment, a knob portion 103 is provided on the outer wall of the plug 10, and the connector 102 and the plug 101 are respectively provided on both sides of the polygonal knob portion 103. The knob portion 103 allows the plug 10 to be rotated easily, making it easy to remove or install the plug 10 on the cylinder assembly.

[0105] In one embodiment, the knob portion 103 protrudes from the outer side wall of the plug 10, and the cross-section of the knob portion 103 is a polygonal structure. The polygonal structure not only makes it convenient to rotate the knob portion 103 directly by hand, but also allows the knob portion 103 to be rotated using tools; for example, the knob portion 103 in this embodiment is a hexagonal structure, so a hexagonal wrench can be used to rotate the knob portion 103.

[0106] Of course, textures can also be directly provided on the side wall of the knob part 103. The textures can increase the friction of the outer side wall of the knob part 103. Alternatively, a rubber ring can be provided around the knob part 103 so that the knob part 103 can be turned directly by hand.

[0107] In one embodiment, the connecting rod 73 includes a first connecting rod 731 and a second connecting rod 732 arranged in parallel. The first connecting rod 731 and the second connecting rod 732 are fixedly connected by a connecting rod connecting part 733. Connecting rod end holes 734 are provided at both ends of the first connecting rod 731 and the second connecting rod 732. The end of the handle 7 is also provided with a handle 7 end hole. The handle 7 and the connecting rod end holes 734 are engaged to allow the handle 7 to rotate with the connecting rod 73. A connecting hole 104 is provided on the connecting rod connecting part 733. Specifically, the connecting hole 104 is located on the central axis of the connecting rod connecting part 733, and the distance from the central axis to the first connecting rod 731 and the second connecting rod 732 on both sides is equal.

[0108] By placing the plug 10 on the connecting rod connection 733, the connecting rod connection 733 is directly exposed on its end face when using a grease gun, making it easy for operators to spot and use the plug 10. This also facilitates new users in quickly identifying and using the plug 10. Furthermore, the plug 10 is positioned on the central axis of the connecting rod connection 733, resulting in a more aesthetically pleasing overall structure.

[0109] In this application, the plug 10 is connected to the cylinder assembly by a thread. When the plug 10 is not in use, it can be fixed to the cylinder assembly by a thread. When the plug 10 needs to be used, it can be fixed to the cylinder assembly by a thread. Since the plug 10 is fixed to the cylinder assembly by a thread, there is no need to worry about the plug 10 falling off the cylinder assembly during use.

[0110] Example 14: As shown in Figure 27, unlike Example 13, an end cap 2 is provided at one end of the cylinder body 1, and a connecting hole 104 is provided on the end cap 2. The connecting hole 104 is provided on the end cap 2, which makes it easy for the user to find that the end cap 2 is provided with a plug 10, thus facilitating the user to find and use the plug 10 in a timely manner.

[0111] Example 15: As shown in Figures 28 and 29, unlike Example 13, the connecting hole 104 is located on one side of the handle 7 in the thickness direction. By placing the connecting hole 104 on one side of the handle 7 in the thickness direction, new users can easily find and use the plug 10, making it convenient for them.

[0112] Example 16: As shown in Figure 30, unlike Example 13, the connecting hole 104 is located along the length of the handle 7 and near the end face of the oil outlet pipe 11. By placing the connecting hole 104 at the end along the length of the handle 7, new users can easily find and use the plug 10, making it convenient for them.

[0113] Example 17: Unlike Example 2, in this example, the handle 7 is only provided with a first handle 72. The medium is injected by independently pressing the first handle 72 to drive the push rod 8 to move.

[0114] In addition to the above embodiments, within the scope disclosed in the claims and specification of this invention, the technical features of this invention can be reselected and combined to form new embodiments. These can be achieved by those skilled in the art without creative effort. Therefore, these embodiments not described in detail in this invention should also be regarded as specific embodiments of this invention and within the protection scope of this invention.

Claims

1. A grease gun, characterized in that, Including: tube body; End cap, located at one end of the cylinder; The oil outlet channel is located on the end cap and connects the inside and outside of the cylinder body; The handle moves relative to the end cap when subjected to gripping force. The handle is connected to a push rod. When the handle is subjected to gripping force, it moves relative to the end cap and pushes the medium in the oil outlet channel to the outside of the cylinder through the push rod. The push rod is provided with an adjustment mechanism, which has at least a first state and a second state. In the first state, the amount of medium pushed out of the cylinder by the push rod is different from the amount of medium pushed out of the cylinder by the push rod in the second state.

2. A grease gun according to claim 1, characterized in that, The adjustment mechanism includes an adjustment shaft and a positioning part connected to the adjustment shaft. The push rod is connected to the adjustment shaft, and the handle is provided with several positioning parts. Different positioning parts correspond to different push strokes of the handle. When the adjustment shaft is locked with different positioning parts, it provides different stroke levels for the push rod.

3. A grease gun according to claim 2, characterized in that, The grip includes a first handle, which is rotatably connected to an end cap or connected to an end cap via a connecting rod, and a positioning part is disposed on the first handle.

4. A grease gun according to claim 3, characterized in that, The positioning parts are provided with guide paths to enable the adjustment shaft to slide and adjust between different positioning parts.

5. A grease gun according to claim 4, characterized in that, The first handle is provided with a mounting plate, a positioning part and a guide path are provided on the mounting plate, the mounting plate protrudes from the first handle toward the end cover and limits the shortest distance between the first handle and the end cover when the mounting plate and the end cover abut.

6. A grease gun according to claim 4, characterized in that, The guide path is a line segment groove or an arc groove, and the width of the guide path groove is smaller than the lateral dimension of the positioning part. The adjusting shaft includes a sliding part that cooperates with the guide path and a locking part that cooperates with the positioning part.

7. A grease gun according to claim 4, characterized in that, The adjusting shaft includes an adjusting end, a sliding part, and a locking part arranged in sequence. The sliding part is sized to match the guide path, and the locking part is sized to match the positioning part. The locking part is larger than the sliding part. The sliding part is provided with an elastic element that pushes the adjusting shaft out of the adjusting end by elastic force to maintain the fit between the locking part and the positioning part.

8. A grease gun according to claim 6 or 7, characterized in that, The locking part is provided with a protrusion or a recess to limit the rotation of the locking part.

9. A grease gun according to claim 3, characterized in that, The grip includes a second handle connected to the end cap. The first and second handles can be held with one hand, and when held with one hand, force can be applied to squeeze or operate the adjustment mechanism.

10. A grease gun according to claim 1, characterized in that, The grip includes a handle body and a handle sleeve that can be nested with the handle body, and the handle sleeve is movably connected to the handle body.

11. A grease gun according to claim 10, characterized in that, The handle sleeve is slidably connected to the handle body.

12. A grease gun according to claim 11, characterized in that, A locking element is hinged to the end of the handle sleeve. One end of the locking element has a protrusion, and the handle body has a locking hole that can cooperate with the protrusion. A tensioning element is provided between the locking element and the handle sleeve.

13. A grease gun according to claim 12, characterized in that, The tensioning element is a torsion spring, which surrounds the locking element's pivot between the locking element and the handle sleeve, with its two ends acting on the handle sleeve and the locking element respectively; or the tensioning element is a top spring, with its two ends abutting against the handle sleeve and the locking element respectively.

14. A grease gun according to claim 10, characterized in that, The handle sleeve is hinged to one side of the end of the handle body via a pivot.

15. A grease gun according to claim 14, characterized in that, The flipping surface of the handle sleeve coincides with or is parallel to the rotating surface of the handle body. The handle sleeve is provided with a stop pin parallel to the rotating shaft, and the handle body is provided with a stop groove that can cooperate with the stop pin.

16. A grease gun according to claim 14, characterized in that, The flip surface of the handle sleeve is perpendicular to the rotating surface of the handle body.

17. A grease gun according to claim 1, characterized in that, It also includes: The connecting rod has its end rotatably connected to the handle, away from the cylinder body. The oil outlet pipe is connected to the cylinder body; The cylinder assembly includes a cylinder body, an oil outlet pipe, a connecting rod, an end cap, and a handle; The plug is detachably mounted on the cylinder assembly.

18. A grease gun according to claim 17, characterized in that, The plug is threaded onto the cylinder assembly. The plug includes a nozzle and a connector located at both ends of the axis. The nozzle is adapted to the end of the oil outlet pipe. The cylinder assembly is provided with a connecting hole that mates with the threaded connector.

19. A grease gun according to claim 18, characterized in that, The outer wall of the plug is provided with a knob, and the connector and the plug are respectively located on both sides of the polygonal knob.

20. A grease gun according to claim 17, 18, or 19, characterized in that, The connecting rod includes a first connecting rod and a second connecting rod arranged in parallel. The first connecting rod and the second connecting rod are fixedly connected by a connecting rod connecting part, and a connecting hole is provided on the connecting rod connecting part.

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