CN113375030B

CN113375030B - Grease gun capable of being filled at multiple angles for automobile maintenance

Info

Publication number: CN113375030B
Application number: CN202110647657.7A
Authority: CN
Inventors: 王海兵
Original assignee: Wulian Power Supply Co Of State Grid Shandong Electric Power Co
Current assignee: Wang Haibing; Wulian Power Supply Co Of State Grid Shandong Electric Power Co
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2022-12-20
Anticipated expiration: 2041-06-10
Also published as: CN113375030A

Abstract

The invention discloses a grease gun capable of being filled from multiple angles for automobile maintenance, which comprises: the upper end of the gun body is in threaded connection with an upper sealing cover, and the upper end of the upper sealing cover is provided with an oil outlet mechanism; the observation window is arranged at the front end of the outer surface of the gun body, and a dial scale for observation is arranged on the right side of the observation window made of transparent materials; lower sealed lid, the lower extreme at the rifle body is installed through threaded connection's mode to lower sealed lid, and the internally mounted of the rifle body has control mechanism, the mechanism that produces oil includes: rifle head, handle and delivery valve. This but grease gun for overhaul of automobile of multi-angle filling can change the oiling head according to specific user demand, and after refueling work is accomplished, can carry out the evacuation to the gas in the butter to the inside sealed effect of grease gun is better, can not cause spilling over of butter, simultaneously, can rotate the angle of oiling head and adjust, and the multi-angle of being convenient for adds the notes.

Description

Grease gun capable of being filled at multiple angles for automobile maintenance

Technical Field

The invention relates to the technical field related to grease guns, in particular to a grease gun capable of being filled from multiple angles for automobile maintenance.

Background

The grease gun is a common device used in the mechanical assembly or maintenance process, and is used for filling grease, especially in the automobile maintenance process, the grease gun is used for filling grease between the connecting parts so as to enhance the lubrication degree between the connecting parts, but the existing grease gun for automobile maintenance still has certain defects, such as:

the authorization notice number is: CN107514535B, entitled 2019.03.08 grease gun for automobile overhaul, the invention relates to the technical field of automobile overhaul, in particular to a grease gun for automobile overhaul, the length of which can be adjusted, comprising a gun head, an oil cylinder and a pull rod; the gun head is hermetically connected with the oil cylinder through an oil inlet oil sealing cover; the plunger is fixedly arranged on the upper end surface of the gun head; a connecting sheet is fixedly arranged on the outer end face of the gun head, and a connecting rod is hinged to the outer end of the connecting sheet; an oil outlet of the gun head is hermetically connected with an oil outlet pipe, and an oil outlet valve is fixedly mounted on the outer end face of the oil outlet pipe; an inner end face of the oil cylinder is provided with a telescopic pipe, and an oil storage cavity is arranged in the telescopic pipe; the sleeve is connected to the outer end face of the oil cylinder in a sliding mode, and the outer end face of the sleeve is connected with the sealing plug in a sealing mode; a pull rod is connected in the sealing plug in a sliding manner; one end of the pull rod is fixedly connected with the leather cup, and the other end of the pull rod is fixedly connected with the handle; the spring is connected to the outer end face of the pull rod in a sliding mode; a graduated scale is fixedly arranged on the outer end face of the sleeve;

according to the invention, the telescopic pipe and the sleeve are matched for use, one end of the sleeve is connected with the oil inlet oil seal cover, the other end of the sleeve is connected with the sealing plug, the length of the telescopic pipe can be adjusted by adjusting the sleeve, and further the length of the gun barrel and the capacity of the oil storage cavity are changed, so that the requirement on the length of the gun barrel during oil injection is met, and the requirement on the oil storage capacity is met; the graduated scale is arranged on the outer end face of the sleeve, so that the length of the gun barrel can be adjusted more accurately according to the change amount when the length of the gun barrel is adjusted; the novel structure is scientific, reasonable in design, convenient to use and strong in practicability;

however, the above prior art solutions have the following drawbacks:

1. when the grease gun in the prior art is used, the sealing performance of the leather cup is poor, and the leather cup is easy to roll in the repeated drawing process, so that the sealing effect is influenced;

2. after the grease gun in the prior art is used for oiling, air in grease cannot be discharged in time, so that the internal storage effect of the grease gun is influenced, and the filling of the grease is influenced;

3. the head of the grease gun in the prior art can not be replaced, and more use requirements can not be met.

Therefore, we propose a grease gun for automobile maintenance which can be filled from multiple angles, so as to solve the problems mentioned above.

Disclosure of Invention

The invention aims to provide a grease gun capable of being filled from multiple angles for automobile maintenance, which aims to solve the problems that most grease gun leather cups proposed in the background art are poor in sealing performance and easy to roll in repeated drawing processes, so that the sealing effect is influenced; after the oiling operation is carried out, air in the grease can not be discharged in time, so that the internal storage effect of the grease gun is influenced, and the filling of the grease is influenced; the head can not be replaced, and can not meet more use requirements.

In order to achieve the purpose, the invention provides the following technical scheme: a grease gun for automobile maintenance that can multi-angle filling includes:

the upper end of the gun body is in threaded connection with an upper sealing cover, and the upper end of the upper sealing cover is provided with an oil outlet mechanism;

the observation window is arranged at the front end of the outer surface of the gun body, and a dial scale for observation is arranged on the right side of the observation window made of transparent materials;

the lower sealing cover is installed at the lower end of the gun body in a threaded connection mode, and a control mechanism is installed inside the gun body.

Preferably, the oil discharging mechanism includes: the oil extraction device comprises a gun head, a handle and an oil extraction valve, wherein the gun head is installed at the upper end of an upper sealing cover, the right end of the gun head is connected with the handle, and the inside of the gun head is connected with the oil extraction valve in a penetrating mode.

Preferably, the left end of the oil outlet valve is connected with a first oil outlet pipe through a mounting piece, and the left end of the oil outlet valve is also connected with a second oil outlet pipe through a mounting piece, wherein the first oil outlet pipe is made of steel materials, the second oil outlet pipe is made of rubber materials, and meanwhile, the right ends of the first oil outlet pipe and the second oil outlet pipe are fixedly connected with mounting heads for mounting; and the filter element for removing impurities is arranged in the mounting piece.

Preferably, the left ends of the first oil outlet pipe and the second oil outlet pipe are connected with an elbow, the elbow and the first oil outlet pipe and the second oil outlet pipe form a rotating structure through a conversion head, and the lower end of the elbow is connected with an oil injection head for injecting butter.

Preferably, the oil injection head comprises a first injection nozzle, a second injection nozzle and a third injection nozzle, the sizes of openings at the top ends of the first injection nozzle, the second injection nozzle and the third injection nozzle are sequentially reduced, and the first injection nozzle, the second injection nozzle and the third injection nozzle are connected with the elbow in a threaded connection mode.

Preferably, the control mechanism comprises a pull rod, a handle, an extrusion spring and a rubber sealing component, wherein:

the pull rod penetrates through the gun body, and can slide up and down in the lower sealing cover;

the handle is fixedly arranged at the lower end of the pull rod;

the extrusion spring is arranged on the outer side of the pull rod in a surrounding mode, the bottom end of the extrusion spring is fixedly connected with the inside of the lower sealing cover, and the top end of the extrusion spring is fixedly connected with the lower end of the rubber sealing assembly;

the rubber seal assembly is fixedly installed at the top end of the pull rod, and the outer surface of the rubber seal assembly is tightly attached to the inner surface of the gun body.

Preferably, the rubber seal assembly further comprises:

the whole sealing bowl is of a hourglass-shaped structure, and the outer diameters of the upper end and the lower end of the sealing bowl are equal;

the fixed core is fixedly arranged inside the sealing bowl, a hemispherical groove is formed in the upper end of the fixed core for installation, and the lower end of the fixed core is fixedly connected with the top end of the pull rod;

the side edge of the lower end of the top block is fixedly connected with the upper end of the sealing bowl, the whole top block is of a bowl-shaped structure, and the upper end of the top block is of a raised hemispherical structure;

the reinforcing block is fixedly installed on the outer surface of the sealing bowl, the reinforcing block is distributed in an annular array mode about the center of the sealing bowl, and the shape of the longitudinal section of the single body of the sealing bowl is of an isosceles trapezoid structure.

Preferably, the upper end of the rifle body still is provided with exhaust assembly, and wherein, exhaust assembly is by solid fixed cylinder, first exhaust net, retainer plate, second exhaust net, spacing groove and stopper, wherein:

a first exhaust net is installed at the upper end of the inside of the fixed cylinder, a fixed ring is arranged below the first exhaust net, and a second exhaust net is integrally arranged inside the fixed ring;

the inner surface of the lower end of the fixed cylinder is welded with a limiting block;

and the upper end of the fixing ring is provided with a limit groove.

Preferably, the solid fixed cylinder is connected with the upper end of the gun body through threaded connection, and the retainer plate is a disassembly structure on the solid fixed cylinder, and the retainer plate is connected with the solid fixed cylinder through the block of spacing groove and stopper and is fixed a position, and simultaneously, spacing groove and stopper are the annular array distribution about the center of solid fixed cylinder and retainer plate respectively.

Preferably, the aperture size of the surface of the first exhaust network is smaller than that of the surface of the second exhaust network, and the first exhaust network is fixedly connected with the fixed cylinder.

Compared with the prior art, the invention has the beneficial effects that: the grease gun capable of being filled in multiple angles for automobile maintenance can replace the grease filling head according to specific use requirements, and can empty gas in grease after the grease filling work is completed, the sealing effect in the grease gun is good, the grease cannot overflow, meanwhile, the angle of the grease filling head can be rotatably adjusted, and the grease filling in multiple angles is facilitated;

1. the first oil outlet pipe and the second oil outlet pipe are arranged on the left side of the oil outlet valve, and are respectively made of steel materials and rubber materials, so that the first oil outlet pipe has certain support performance, the second oil outlet pipe is relatively soft and can be freely bent, and grease can be filled in different scenes by replacing the first oil outlet pipe and the second oil outlet pipe;

2. the oil injection head is arranged on the elbow, the oil injection head comprises a first injection nozzle, a second injection nozzle and a third injection nozzle, and the sizes of openings at the top ends of the first injection nozzle, the second injection nozzle and the third injection nozzle are sequentially reduced, so that the thicknesses of sprayed butter are different by replacing different oil injection heads, and the butter is injected to parts with different gaps;

3. the rubber sealing assembly is arranged in the gun body, and the reinforcing block is arranged on the outer surface of the sealing bowl, so that the toughness of the whole sealing bowl in the axis direction can be enhanced, the sealing bowl is prevented from being turned over in the repeated drawing process, and the sealing bowl is arranged into the hourglass-shaped structure, so that the up-and-down double sealing can be performed, and the sealing effect is enhanced;

4. the top block is arranged above the sealing bowl and is made of rubber materials, the upper end of the top block is of a hemispherical structure, and meanwhile, the inside of the top block is of a hollow structure, so that when the gun is used and butter in the gun body is about to be filled, the butter in the gun body can be completely extruded through the arrangement of the top block, the waste of the butter is reduced, and the overall buffer performance of the rubber sealing assembly can be enhanced;

5. by arranging the exhaust assembly, after the gun body is oiled, the exhaust assembly can be arranged at the upper end of the gun body, and the rubber sealing assembly can extrude butter under the action of manually pushing the pull rod, so that the butter can be exhausted under the combined action of the first exhaust net and the second exhaust net, air sucked in the butter during oiling is exhausted, more storage space is prevented from being occupied by the air, and excessive air can be prevented from being filled into the mechanical assembly during butter filling;

6. the amount of grease in the gun body can be observed through the arrangement of the observation window which is made of transparent materials and the arrangement of the dial scale, quantitative oiling can be facilitated, and the specific residual Huang Youliang in the gun body can be observed conveniently;

7. the lower sealing cover is arranged at the lower end of the gun body and is connected with the gun body in a threaded connection mode, so that the pull rod, the extrusion spring and the rubber sealing assembly in the gun body can be disassembled by disassembling the lower sealing cover, and the internal structure of the gun body can be conveniently overhauled and cleaned;

8. through being provided with the conversion head on the elbow, wherein, first play oil pipe and second play oil pipe all are connected with the oiling head through the conversion head on the elbow to under the effect of conversion head, can realize that elbow and first play oil pipe and second go out the rotation between the oil pipe, thereby can adjust the angle of oiling head, thereby accomplish the butter filling work of multi-angle.

Drawings

FIG. 1 is a front view of the overall structure of the present invention;

FIG. 2 is a rear view of the overall structure of the present invention;

FIG. 3 is a schematic view of the connecting structure of the elbow and the oil injection head of the present invention;

FIG. 4 is a left side view of the entire structure of the oil outlet valve of the present invention connected to a first oil outlet pipe;

FIG. 5 is a schematic right-view overall structure of the oil outlet valve of the present invention connected to a first oil outlet pipe;

FIG. 6 is a schematic sectional view of the connection between the outlet valve and the first outlet pipe according to the present invention;

FIG. 7 is a schematic view of the connection structure of the gun body and the lower sealing cap according to the present invention;

FIG. 8 is a schematic view of the connection structure of the lower sealing cap and the pull rod according to the present invention;

FIG. 9 is a schematic top view of the overall structure of the tie bar and rubber seal assembly of the present invention;

FIG. 10 is a schematic view of the entire structure of the connection between the pull rod and the rubber seal assembly of the present invention from the bottom;

FIG. 11 is a schematic front sectional view of a rubber seal assembly according to the present invention;

FIG. 12 is a top view of the rubber seal assembly of the present invention;

FIG. 13 is a bottom view of the rubber seal assembly of the present invention;

FIG. 14 is a schematic sectional view of the gun body and the vent assembly in front view;

FIG. 15 is a schematic top view of the gun body and vent assembly of the present invention;

FIG. 16 is a bottom view of the gun body and vent assembly of the present invention.

In the figure: 1. a gun body; 2. an upper sealing cover; 3. a gun head; 4. a grip; 5. an oil outlet valve; 6. a mounting member; 601. a filter element; 7. a first oil outlet pipe; 701. a mounting head; 8. bending the pipe; 801. a conversion head; 9. an oil filling head; 901. a first injection nozzle; 902. a second nozzle; 903. a third injection nozzle; 10. a second oil outlet pipe; 11. an observation window; 12. a lower sealing cover; 13. a pull rod; 14. a handle; 15. a compression spring; 16. a rubber seal assembly; 1601. sealing the bowl; 1602. fixing the core; 1603. a top block; 1604. a reinforcing block; 17. an exhaust assembly; 1701. a fixed cylinder; 1702. a first exhaust network; 1703. a stationary ring; 1704. a second exhaust network; 1705. a limiting groove; 1706. and a limiting block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

Referring to fig. 1-16, the present invention provides a technical solution: a multi-angle filling grease gun for automobile maintenance comprises a gun body 1, an oil outlet mechanism, an observation window 11, a lower sealing cover 12 and a control mechanism, wherein the oil outlet mechanism comprises a gun head 3, a handle 4 and an oil outlet valve 5; the control mechanism comprises a pull rod 13, a handle 14, an extrusion spring 15 and a rubber sealing component 16;

when the grease gun is used, grease is filled into the grease gun, wherein during the grease filling operation, referring to fig. 7, the gun body 1 and other structures inside the gun body are firstly detached from the upper sealing cover 2, then the upper end of the gun body 1 is inserted into the grease, the grease is sucked into the gun body 1 in a mode of pulling the pull rod 13 outwards through the hand-pulling handle 14, or the grease is added into the gun body 1 in a filling mode, the pull rod 13 is pulled outwards at the same time, after the grease is filled into the gun body 1, the exhaust assembly 17 is installed at the top end of the gun body 1 in a threaded connection mode, at the moment, the pull rod 13 is released, the pull rod 13 pushes the rubber sealing assembly 16 under the action of the compression spring 15 in a compression state, so that the rubber sealing assembly 16 pushes the grease upwards, therefore, a large amount of air is exhausted under the action of the first exhaust net 1702 and the second exhaust net 1704 on the exhaust assembly 17, and the exhaust of the grease is reduced, on the one hand, the air occupying too much storage space in the grease can be reduced, and on the other hand, the air can be filled into a zero-filling mode, and the grease can be added into the grease;

referring to fig. 14, 15 and 16, after the exhaust is finished, the exhaust assembly 17 is detached, the upper end of the gun body 1 after oiling is connected with the upper sealing cover 2 through threads, at the moment, the fixing ring 1703 on the fixing cylinder 1701 is detached, and because the fixing ring 1703 is provided with the limiting groove 1705 and the limiting groove 1705 is connected with the limiting block 1706 in a clamping manner, the fixing ring 1703 can be conveniently cleaned from grease while temporarily storing between the first exhaust net 1702 and the second exhaust net 1704;

when the grease gun is used for grease filling operation, referring to fig. 1 and 2, the first oil outlet pipe 7, the second oil outlet pipe 10 and the grease filling head 9 can be replaced according to the position and the gap size of the maintenance part, and as the first oil outlet pipe 7 can meet the grease filling at a specified position and the second oil outlet pipe 10 has certain flexibility, the second oil outlet pipe 10 can be bent, so that the grease filling is carried out at the maintenance part at the bent position, and the first oil outlet pipe 7 and the second oil outlet pipe 10 meet different use parts;

referring to fig. 3, since the grease filling head 9 includes the first nozzle 901, the second nozzle 902 and the third nozzle 903, and the sizes of the top openings of the first nozzle 901, the second nozzle 902 and the third nozzle 903 are sequentially reduced, the thicknesses of grease sprayed by the grease filling head 9 can be different by replacing different grease filling heads 9, so that grease can be added to parts with different gap sizes, and the grease filling amount can be controlled more easily;

in addition, referring to fig. 4, 5 and 6, the mounting head 701 is arranged on the first outlet pipe 7, so that the mounting piece 6 can connect the first outlet pipe 7 and the outlet valve 5, thereby facilitating the disassembly and replacement of the first outlet pipe 7, and the filter core 601 is arranged to filter the grease in the outlet valve 5, so as to prevent the grease from blocking the grease injection head 9 by impurities in the grease, and in addition, the conversion head 801 is arranged to realize the rotation of the elbow 8 and the left ends of the first outlet pipe 7 and the second outlet pipe 10, so that the angle adjustment can be carried out on the grease injection head 9 connected to the elbow 8, and the multi-angle in-and-out filling effect can be realized;

in the butter filling process, the handle 4 is manually pressed, so that butter in the gun body 1 enters the oil outlet valve 5 under the action of the upper sealing cover 2 and the gun head 3, and is finally input into the oiling head 9 through the first oil outlet pipe 7 or the second oil outlet pipe 10 and is added through the oiling head 9;

with the reduction of the grease amount in the gun body 1, referring to fig. 8, the rubber sealing component 16 moves upwards under the action of pressure, so that the rubber sealing component 16 extrudes grease, the grease amount in the gun body 1 can be observed through the transparent observation window 11 in the gun body 1, in addition, the whole sealing bowl 1601 on the rubber sealing component 16 is hourglass-shaped, and the upper end and the lower end of the sealing bowl 1601 are tightly attached to the inner surface of the gun body 1, so that the sealing effect between the sealing bowl 1601 and the gun body 1 can be enhanced, in addition, the reinforcing block 1604 is arranged on the outer surface of the sealing bowl 1601, the sealing bowl 1601 can be prevented from being rolled up in the repeated sliding process to affect the sealing performance, in addition, the arrangement of the top block 1603 can enable the top block 1603 to deform when the grease in the gun body 1 is about to be used up, so that more space in the gun body 1 can be extruded, so that the grease in the gun body 1 can be extruded more thoroughly, the waste is reduced, and this is the working principle of the grease gun for overhauling a multi-angle grease gun capable of filling.

The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, and the details are not described, and the content not described in detail in the specification belongs to the prior art known by persons skilled in the art.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a but grease gun for overhaul of automobile of multi-angle filling which characterized in that includes:

the oil-discharging gun comprises a gun body (1), wherein the upper end of the gun body (1) is in threaded connection with an upper sealing cover (2), and the upper end of the upper sealing cover (2) is provided with an oil outlet mechanism;

the observation window (11), the observation window (11) is arranged at the front end of the outer surface of the gun body (1), and a dial scale for observation is arranged on the right side of the observation window (11) made of transparent materials;

the lower sealing cover (12), the lower sealing cover (12) is installed at the lower end of the gun body (1) in a threaded connection mode, and a control mechanism is installed inside the gun body (1);

the mechanism that produces oil includes: the device comprises a gun head (3), a handle (4) and an oil outlet valve (5), wherein the gun head (3) is installed at the upper end of an upper sealing cover (2), the handle (4) is connected to the right end of the gun head (3), and the oil outlet valve (5) penetrates through the interior of the gun head (3);

the left end of the oil outlet valve (5) is connected with a first oil outlet pipe (7) through a mounting piece (6), the left end of the oil outlet valve (5) is further connected with a second oil outlet pipe (10) through the mounting piece (6), the first oil outlet pipe (7) is made of steel materials, the second oil outlet pipe (10) is made of rubber materials, and meanwhile, the right ends of the first oil outlet pipe (7) and the second oil outlet pipe (10) are fixedly connected with a mounting head (701) for mounting; meanwhile, a filter core (601) for removing impurities is arranged in the mounting piece (6);

the left ends of the first oil outlet pipe (7) and the second oil outlet pipe (10) are both connected with an elbow (8), the first oil outlet pipe (7) and the second oil outlet pipe (10) form a rotating structure through a conversion head (801), and the lower end of the elbow (8) is connected with an oiling head (9) for injecting butter;

the upper end of rifle body (1) still is provided with exhaust subassembly (17), and wherein, exhaust subassembly (17) are by solid fixed cylinder (1701), first exhaust net (1702), retainer plate (1703), second exhaust net (1704), spacing groove (1705) and stopper (1706), wherein:

a first exhaust net (1702) is installed at the upper end inside the fixed cylinder (1701), a fixed ring (1703) is arranged below the first exhaust net (1702), and a second exhaust net (1704) is integrally arranged inside the fixed ring (1703);

the inner surface of the lower end of the fixed cylinder (1701) is welded with a limiting block (1706);

the upper end of the fixing ring (1703) is provided with a limiting groove (1705);

the fixing barrel (1701) is connected with the upper end of the gun body (1) in a threaded connection mode, the fixing ring (1703) is of a detachable structure on the fixing barrel (1701), the fixing ring (1703) and the fixing barrel (1701) are positioned through clamping connection of the limiting groove (1705) and the limiting block (1706), and meanwhile, the limiting groove (1705) and the limiting block (1706) are distributed in an annular array relative to the centers of the fixing ring (1703) and the fixing barrel (1701) respectively;

the aperture size of the surface of the first exhaust net (1702) is smaller than that of the surface of the second exhaust net (1704), and the first exhaust net (1702) is fixedly connected with the fixed cylinder (1701).

2. The grease gun capable of being filled from multiple angles for automobile maintenance according to claim 1, characterized in that: the oiling head (9) comprises a first injection nozzle (901), a second injection nozzle (902) and a third injection nozzle (903), the sizes of openings at the top ends of the first injection nozzle (901), the second injection nozzle (902) and the third injection nozzle (903) are sequentially reduced, and the first injection nozzle (901), the second injection nozzle (902) and the third injection nozzle (903) are connected with the elbow (8) in a threaded connection mode.

3. The grease gun capable of being filled from multiple angles for automobile maintenance according to claim 1, characterized in that: the control mechanism is composed of a pull rod (13), a handle (14), an extrusion spring (15) and a rubber sealing component (16), wherein:

the pull rod (13) penetrates through the gun body (1), and the pull rod (13) can slide up and down in the lower sealing cover (12);

the handle (14) is fixedly arranged at the lower end of the pull rod (13);

the extrusion spring (15) is arranged on the outer side of the pull rod (13) in a surrounding mode, the bottom end of the extrusion spring (15) is fixedly connected with the inside of the lower sealing cover (12), and the top end of the extrusion spring (15) is fixedly connected with the lower end of the rubber sealing component (16);

the rubber seal assembly (16) is fixedly arranged at the top end of the pull rod (13), and the outer surface of the rubber seal assembly (16) is tightly attached to the inner surface of the gun body (1).

4. The grease gun capable of being filled from multiple angles for automobile maintenance as claimed in claim 3, wherein: the rubber sealing assembly (16) further comprises:

the sealing bowl (1601) is of an hourglass-shaped structure as a whole, and the outer diameters of the upper end and the lower end of the sealing bowl (1601) are equal;

the fixed core (1602), the fixed core (1602) is fixedly arranged in the sealing bowl (1601), a hemispherical groove is formed in the upper end of the fixed core (1602) for installation, and the lower end of the fixed core (1602) is fixedly connected with the top end of the pull rod (13);

the side edge of the lower end of the top block (1603) is fixedly connected with the upper end of the sealing bowl (1601), the whole top block (1603) is of a bowl-shaped structure, and the upper end of the top block (1603) is of a convex hemispherical structure;

the reinforcing blocks (1604) are fixedly installed on the outer surface of the sealing bowl (1601), the reinforcing blocks (1604) are distributed in an annular array relative to the center of the sealing bowl (1601), and the single-body longitudinal section of the sealing bowl (1601) is in an isosceles trapezoid structure.