Filling device of grease gun

Abstract

The utility model belongs to the technical field of grease guns, in particular to a filling device of a grease gun, which comprises a gun cover and a handle, an oil outlet nozzle and an exhaust nozzle are arranged on the gun cover, an oil pushing cavity is arranged in the gun cover, the exhaust nozzle is communicated with the oil pushing cavity, one end of the oil pushing cavity is communicated with the oil outlet nozzle, an oil inlet is arranged at the bottom of the gun cover, and the oil inlet is communicated with the oil pushing cavity. An oil pushing rod is further arranged in the oil pushing cavity, a connecting part is further arranged on the gun cover, one end of the oil pushing rod is exposed out of the oil pushing cavity, a transmission gear is arranged on the connecting part and rotationally arranged on the connecting part, a first tooth part is arranged on the oil pushing rod, the bottom of the transmission gear is meshed with the first tooth part, and a rotating part is arranged on the lower half portion of the connecting part. The axial transverse line of the rotating part is perpendicular to the axial transverse line of the oil pushing rod, the handle is rotationally arranged on the rotating part, the driving block is fixedly arranged at the front end of the handle, the second tooth part is arranged at the bottom of the driving block, a double-gear transmission structure is adopted, and therefore the double labor-saving effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of grease guns, and particularly refers to a filling device for a grease gun. Background Art

[0002] A grease gun is a manual tool for filling lubricating grease into mechanical equipment. A traditional grease gun generally includes an oil storage cylinder and a filling device arranged at the upper end of the oil storage pipe. The filling device mainly consists of a gun cap and a handle rotatably arranged on the gun cap. The gun cap is provided with an oil inlet, a grease pushing cavity and an oil outlet nozzle. The grease pushing cavity is horizontally opened on the gun head and is closed at one end and open at the other end. The oil outlet nozzle is communicated with the closed end of the grease pushing cavity, and the grease pushing cavity is communicated with the oil storage cylinder through the oil inlet. A grease pushing rod is slidably arranged in the grease pushing cavity. One end of the grease pushing rod passes through the open end of the grease pushing cavity, so that one end of the grease pushing rod is exposed outside the grease pushing cavity and is movably connected with the upper end of the handle. The upper end of the handle is also movably connected with the gun head through a movable connecting piece. When in use, by rotating the handle outwards, the grease pushing rod is pulled out and the oil inlet is opened, so that the lubricating grease in the oil storage cylinder can enter the grease pushing cavity through the oil inlet. At this time, after the user drives the handle to rotate inwards, the grease pushing rod is driven to push forward. At this time, the grease pushing rod pushes out the lubricating grease in the grease pushing cavity, so as to complete the work of sucking the lubricating grease from the oil inlet and pushing out the grease from the oil outlet nozzle. For example, in Chinese Patent CN211040411U, its working principle is that by rotating the handle counterclockwise to drive the pushing member to rotate counterclockwise by a certain angle, under the cooperative action of the rack of the auxiliary gear engaging with the first tooth part to drive it to rotate counterclockwise, the second tooth part engages with the locking tooth to drive the plunger to move horizontally outwards. At the same time, the central shaft rolls in the chute and moves outwards at the same time. Since the auxiliary gear is fixedly installed on the head cover through the mounting hole and the clamping part, the auxiliary gear only plays an auxiliary role in driving the handle and cannot directly drive the pushing member. In fact, the user still directly drives the pushing member to rotate by rotating the handle, which cannot achieve the maximum labor-saving effect. Moreover, a special chute needs to be opened on the head cover so that the central shaft of the pushing member can smoothly move along the chute. Such a structure not only increases the manufacturing cost of the head cover, but also makes the structure more complex and inconvenient for the manufacturer to assemble. Summary of the Invention

[0003] The purpose of the utility model is to provide a grease gun with a simple structure, adopting a double gear transmission structure, so as to achieve the effect of double labor saving and make it more labor-saving for the user to drive the handle to rotate.

[0004] The purpose of the utility model is realized as follows:

[0005] A filling device for a grease gun, comprising a gun cap that can be connected to the top end of an oil storage pipe and a handle rotatably arranged on the gun cap. An oil outlet nozzle and an exhaust nozzle are provided on the gun cap. A grease pushing cavity is arranged inside the gun cap. The exhaust nozzle is communicated with the grease pushing cavity. One end of the grease pushing cavity is communicated with the oil outlet nozzle. An oil inlet is arranged at the bottom of the gun cap. The oil inlet is communicated with the grease pushing cavity so that grease can enter the grease pushing cavity through the oil inlet. A grease pushing rod for pushing the grease out to the oil outlet nozzle is further arranged in the grease pushing cavity. A connecting part is also arranged on the gun cap. One end of the grease pushing rod exposes outside the grease pushing cavity. A transmission gear is arranged on the connecting part. The transmission gear is rotatably arranged on the connecting part through a rotating shaft. The transmission gear is located above the grease pushing rod. A first tooth part is arranged on the grease pushing rod. The bottom of the transmission gear meshes with the first tooth part. A rotating part is arranged on the lower half of the connecting part. The rotating part is located directly below the rotating shaft, and the axial horizontal line of the rotating part is perpendicular to the axial horizontal line of the grease pushing rod. The handle is rotatably arranged on the rotating part. A driving block is fixedly arranged at the front end of the handle. A second tooth part meshing with the top end of the transmission gear is arranged at the bottom of the driving block. After the handle rotates, the driving block can drive the transmission gear to rotate. At this time, the transmission gear drives the grease pushing rod to move horizontally in the grease pushing cavity.

[0006] Further, the handle includes two symmetrically arranged side plates and a connecting plate arranged between the two side plates. The side plates and the connecting plate are integrally formed. The connecting part is arranged between the symmetric side plates. The rotating part includes connecting columns respectively arranged on both sides of the connecting part. Rotating holes are arranged on the side plates. The connecting columns are arranged in the rotating holes. A connecting sleeve is arranged in the rotating hole. The connecting sleeve is sleeved on the connecting column and connected to the connecting column. Abutting parts are arranged on the outer side surfaces of the side plates. One end of the connecting sleeve exposes outside the rotating hole and abuts against the abutting part.

[0007] Further, a through hole is formed in the connecting column. A pressing part is arranged in the through hole. The pressing part includes a rod body and a pressing cap arranged at one end of the rod body. The rod body is arranged in the through hole. The pressing cap is arranged outside the through hole. The lower surface of the pressing cap abuts against the top end of the connecting sleeve.

[0008] Further, an abutting groove is recessed and formed around the connecting column. The bottom end of the connecting sleeve is arranged in the abutting groove.

[0009] Further, the driving block is arranged between the symmetric side plates. Fixing holes are symmetrically formed in the driving block. Installation rods are arranged in the fixing holes. Installation holes with the same number as the installation rods are formed at the top ends of the side plates. Both ends of the installation rod expose outside the fixing hole, and both ends of the installation rod are respectively arranged in the installation holes of the two side plates.

[0010] Furthermore, limit posts are symmetrically arranged on both sides of the driving block. The fixing holes penetrate through the limit posts, and the limit posts on both sides of the driving block are respectively abutted against the inner sides of the two side plates.

[0011] Furthermore, an installation groove is formed in the connecting portion. One end of the oil pushing rod exposes outside the oil pushing cavity and is located in the installation groove. The transmission gear is arranged in the installation groove. Mounting holes are formed in the inner walls on both sides of the installation groove. A gear hole is formed in the middle of the transmission gear. The rotating shaft includes a fixed sleeve. The two ends of the fixed sleeve are respectively arranged in the mounting holes on both sides of the installation groove, and the fixed sleeve is arranged in the gear hole.

[0012] Furthermore, the rotating shaft further includes threaded rods respectively arranged at both ends of the fixed sleeve. A threaded hole is formed in the fixed sleeve. One end of the threaded rod is arranged in the threaded hole. Arc-shaped holes are formed on both sides of the handle. The other end of the threaded rod is arranged outside the threaded hole and is located in the arc-shaped hole.

[0013] Furthermore, a groove is concavely formed on the outer wall of the handle. A rubber grip is sleeved at the bottom of the handle. A holding groove is concavely formed on the rubber grip.

[0014] The prominent and beneficial technical effects of the present utility model compared with the prior art are:

[0015] The utility model belongs to the technical field of grease guns, and particularly refers to a filling device for a grease gun, which includes a gun cap and a handle rotatably arranged on the gun cap. The gun cap is the same as the gun caps on common grease guns in the market. The oil outlet nozzle, the exhaust nozzle and the grease pushing cavity on the gun cap are all conventional technologies in this field of grease guns. An exhaust valve can be connected to the exhaust nozzle. The function of the exhaust valve is to enable users to exhaust the air in the storage oil pipe and the grease pushing cavity, so that the grease gun can be used normally. And the inner wall of the bottom of the gun cap is provided with an internal thread that matches the external thread at the top of the storage oil pipe. Thus, when the user rotates the storage oil pipe, the storage oil pipe can be connected to the gun cap, and the grease in the storage oil pipe can smoothly enter the grease pushing cavity through the oil inlet at the bottom of the gun cap. Therefore, when the user controls the grease pushing rod to advance in the grease pushing cavity through the handle, the grease pushing rod can push the grease in the grease pushing cavity out of the oil outlet nozzle. Since one end of the grease pushing rod is exposed outside the grease pushing cavity, and the transmission gear on the connecting part is located above the grease pushing rod, the bottom of the transmission gear meshes with the first tooth part on the grease pushing rod, and the rotating part is located directly below the rotating shaft. The handle is rotatably arranged on the rotating part at the lower half of the connecting part. The axial horizontal line of the rotating part is perpendicular to the axial horizontal line of the grease pushing rod. Thus, the rotation point of the handle is located directly below the rotating shaft and is arranged at the lower half of the connecting part. And the driving block is fixed at the front end of the handle, so that the distance between the rotation point and the driving block can be effectively increased. When the handle rotates outward around the rotation point, the rotation stroke of the driving block driven will also increase. After the rotation stroke of the driving block increases, the rotation angle of the transmission gear will increase. And after the rotation angle of the transmission gear increases, at this time, the distance that the transmission gear drives the grease pushing column to move outward horizontally will also increase. Thus, even if the handle rotates a small angle, the rotation stroke of the driving block at the top of the handle is relatively large, which can ensure that the oil inlet is opened, so that the grease can smoothly enter the grease pushing cavity through the oil inlet. Finally, when the handle rotates inward, the grease in the grease pushing cavity can be pushed out to the oil outlet nozzle through the grease pushing rod. When the oil filling port on the mechanical equipment is in a relatively narrow space, after the user drives the handle to rotate a small angle, the oil inlet can be opened, so that the grease gun equipped with this filling device can be used normally, without worrying that when the handle rotates outward, it will collide with the mechanical equipment and cause the handle to be unable to rotate continuously, resulting in the situation that the oil inlet at the bottom of the gun cap cannot be opened. And when the rotation angle of the driving handle becomes smaller, a certain labor-saving effect can also be achieved. And the second tooth part at the bottom of the driving block meshes with the top of the transmission gear. Thus, when the user rotates the handle outward, the driving block can be driven to rotate synchronously. When the driving block rotates, it will drive the transmission gear to rotate counterclockwise. After the transmission gear rotates, it will drive the grease pushing rod to move outward horizontally. Thus, when the pushing rod moves to a certain position, the oil inlet will be opened, so that the grease in the storage oil pipe enters the grease pushing cavity. In this process, the user does not directly drive the transmission gear to rotate through the handle. Instead, when the handle rotates, the transmission gear is driven by the driving block, and a gear meshing structure is adopted between the driving block and the transmission gear.The driving block makes it easier to drive the transmission gear to rotate, thus achieving the first level of labor-saving effect. When the transmission gear rotates, it drives the oil pushing rod to move outwards. Moreover, a gear meshing structure is also adopted between the transmission gear and the oil pushing rod, thus achieving the second level of labor-saving effect, and achieving a double labor-saving effect, making it easier for the user to rotate the handle. Also, the transmission gear does not need to move left and right, ensuring that the upper and lower ends of the transmission gear can always maintain a meshing state with the second tooth part at the bottom of the driving block and the first tooth part on the oil pushing rod respectively, making the meshing between the transmission gear, the driving block, and the oil pushing rod more stable and firm. When the grease enters the oil pushing cavity and the user rotates the handle inwards, at this time, the handle will drive the transmission gear to rotate clockwise through the driving block. After the transmission gear rotates, it will drive the oil pushing rod to move inwards horizontally, so that the oil pushing rod pushes the grease that has entered the oil pushing cavity out of the oil nozzle, thus completing the oil output work of the grease gun. Brief Description of the Drawings

[0016] Figure 1 is the three-dimensional view of the present utility model Figure 1 .

[0017] Figure 2 is the three-dimensional view of the present utility model Figure 2 .

[0018] Figure 3 is the exploded view of the gun cap and the handle of the present utility model.

[0019] Figure 4 is the structural schematic diagram of the handle and the driving block of the present utility model.

[0020] Figure 5 is the exploded view of the driving block and the mounting rod of the present utility model.

[0021] Figure 6 is the exploded view of the gun cap, the connecting sleeve and the pressing member of the present utility model.

[0022] Figure 7 is the exploded view of the connecting sleeve and the pressing member of the present utility model.

[0023] Figure 8 is the structural schematic diagram of the transmission gear and the driving block of the present utility model.

[0024] Figure 9 is the structural schematic diagram of the transmission gear, the driving block and the oil pushing rod of the present utility model.

[0025] Figure 10 is the exploded view of the gun cap, the transmission gear and the oil pushing rod of the present utility model.

[0026] Figure 11 is the exploded view of the transmission gear and the fixed sleeve of the present utility model.

[0027] Figure 12 It is an exploded view of the fixed sleeve and the threaded rod of the present utility model.

[0028] Figure 13 It is a cross-sectional view of the gun cap of the present utility model.

[0029] Figure 14 It is a three-dimensional Figure 1 .

[0030] Figure 15 It is a three-dimensional Figure 2 .

[0031] The meanings represented by the reference numerals in the figure are as follows:

[0032] 1 - gun cap; 2 - handle; 3 - oil outlet nozzle; 4 - exhaust nozzle; 5 - oil pushing cavity; 6 - oil inlet;

[0033] 7 - oil pushing rod; 8 - connecting part; 9 - installation groove; 10 - transmission gear; 11 - first tooth part;

[0034] 12 - driving block; 13 - second tooth part; 14 - side plate; 15 - connecting plate; 16 - connecting column;

[0035] 17 - rotating hole; 18 - connecting sleeve; 19 - abutting part; 20 - through hole; 21 - pressing part; 22 - rod body;

[0036] 23 - pressing cap; 24 - abutting groove; 25 - fixing hole; 26 - installation rod; 27 - installation hole;

[0037] 28 - limiting column; 29 - gear hole; 30 - fixed sleeve; 31 - frame hole; 32 - threaded hole;

[0038] 33 - threaded rod; 34 - arc-shaped hole; 35 - groove; 36 - rubber grip; 37 - gripping groove. Specific embodiments

[0039] The present utility model will be further described below in conjunction with specific embodiments:

[0040] The utility model belongs to the technical field of grease guns, and particularly refers to a filling device for a grease gun, which includes a gun cap 1 and a handle 2 rotatably arranged on the gun cap 1. The gun cap 1 is the same as the gun cap 1 on common grease guns in the market. The oil outlet nozzle 3, the exhaust nozzle 4 and the grease pushing cavity 5 on the gun cap 1 are all conventional technologies in this field of grease guns. An exhaust valve can be connected to the exhaust nozzle 4, and the function of the exhaust valve is to enable the user to exhaust the air in the oil storage pipe and the grease pushing cavity 5, so that the grease gun can be used normally. And the inner wall at the bottom of the gun cap 1 is provided with an internal thread that matches the external thread at the top of the oil storage pipe. Thus, when the user rotates the oil storage pipe, the oil storage pipe can be connected to the gun cap 1, and the grease in the oil storage pipe can smoothly enter the grease pushing cavity 5 through the oil inlet 6 at the bottom of the gun cap 1. Therefore, when the user controls the grease pushing rod 7 to advance in the grease pushing cavity 5 through the handle 2, the grease pushing rod 7 can push the grease in the grease pushing cavity 5 out of the oil outlet nozzle 3. Since one end of the grease pushing rod 7 is exposed outside the grease pushing cavity 5, and the transmission gear 10 on the connecting part 8 is located above the grease pushing rod 7, the bottom of the transmission gear 10 meshes with the first tooth part 11 on the grease pushing rod 7, and the rotating part is located directly below the rotating shaft. The handle 2 is rotatably arranged on the rotating part at the lower half of the connecting part 8, and the axial horizontal line of the rotating part is perpendicular to the axial horizontal line of the grease pushing rod 7. Thus, the rotation point of the handle 2 is located directly below the rotating shaft and is arranged at the lower half of the connecting part 8, and the driving block 12 is fixed to the front end of the handle 2, so that the distance between the rotation point and the driving block 12 can be effectively increased. When the handle 2 rotates outward around the rotation point, the rotation stroke of the driving block 12 driven will also increase. After the rotation stroke of the driving block 12 increases, the rotation angle of the transmission gear 10 will increase. And after the rotation angle of the transmission gear 10 increases, at this time, the distance that the transmission gear 10 drives the grease pushing column to move outward horizontally will also increase. Thus, even if the handle 2 rotates a small angle, the rotation stroke of the driving block 12 at the top of the handle 2 is relatively large, which can ensure that the oil inlet 6 is opened, so that the grease can smoothly enter the grease pushing cavity 5 through the oil inlet 6. Finally, when the handle 2 rotates inward, the grease in the grease pushing cavity 5 can be pushed out to the oil outlet nozzle 3 through the grease pushing rod 7. When the oil filling port on the mechanical equipment is in a relatively narrow space, after the user drives the handle 2 to rotate a small angle, the oil inlet 6 can be opened, so that the grease gun equipped with this filling device can be used normally, without worrying that the handle 2 will collide with the mechanical equipment when it rotates outward, resulting in the handle 2 being unable to rotate continuously and the oil inlet 6 at the bottom of the gun cap 1 not being able to be opened. And when the rotation angle of driving the handle 2 becomes smaller, a certain labor-saving effect can also be achieved. And the second tooth part 13 at the bottom of the driving block 12 meshes with the top of the transmission gear 10. Thus, when the user rotates the handle 2 outward, the driving block 12 can be driven to rotate synchronously. When the driving block 12 rotates, it will drive the transmission gear 10 to rotate counterclockwise. After the transmission gear 10 rotates, it will drive the grease pushing rod 7 to move outward horizontally. Thus, when the pushing rod moves to a certain position, the oil inlet 6 will be opened.Thus, the grease in the oil storage pipe enters the oil pushing cavity 5. In this process, the user does not directly drive the transmission gear 10 to rotate through the handle 2. Instead, when the handle 2 rotates, it drives the transmission gear 10 to rotate through the driving block 12. And a gear meshing structure is adopted between the driving block 12 and the transmission gear 10, making it more labor-saving for the driving block 12 to drive the transmission gear 10 to rotate, thus achieving the first labor-saving effect. When the transmission gear 10 rotates, it drives the oil pushing rod 7 to move outwards. Also, a gear meshing structure is adopted between the transmission gear 10 and the oil pushing rod 7, thus achieving the second labor-saving effect, and achieving a double labor-saving effect, making it more labor-saving for the user to drive the handle 2 to rotate. Moreover, the transmission gear 10 does not need to move left and right, ensuring that the upper and lower ends of the transmission gear 10 can always be in meshing with the second tooth part 13 at the bottom of the driving block 12 and the first tooth part 11 on the oil pushing rod 7 respectively, making the meshing between the transmission gear 10 and the driving block 12 and the oil pushing rod 7 more stable and firm. And when the grease enters the oil pushing cavity 5, after the user rotates the handle 2 inwards, at this time the handle 2 will drive the transmission gear 10 to rotate clockwise through the driving block 12. After the transmission gear 10 rotates, it will drive the oil pushing rod 7 to move inwards horizontally, so that the oil pushing rod 7 pushes the grease that has entered the oil pushing cavity 5 out of the oil outlet nozzle 3, thus completing the oil output work of the grease gun.

[0041] Preferably, the handle 2 includes two symmetrically arranged side plates 14 and a connecting plate 15 arranged between the two side plates 14. The side plates 14 and the connecting plate 15 are integrally formed. The connecting part 8 is arranged between the symmetric side plates 14. The rotating part includes connecting columns 16 respectively arranged on both sides of the connecting part 8. Rotating holes 17 are provided on the side plates 14. The connecting columns 16 are arranged in the rotating holes 17. A connecting sleeve 18 is arranged in the rotating holes 17. The connecting sleeve 18 is sleeved on the connecting columns 16 and connected to the connecting columns 16. Abutting parts 19 are arranged on the outer side surfaces of the side plates 14. One end of the connecting sleeve 18 exposes outside the rotating holes 17 and abuts against the abutting parts 19. The rotating holes 17 on the side plates 14 enable the connecting columns 16 to smoothly enter the side plates 14, and the connecting sleeve 18 can pass through the rotating holes 17 and be sleeved on the connecting columns 16. One end of the connecting columns 16 exposes outside the rotating holes 17 and abuts against the abutting parts 19 on the outer side surfaces of the side plates 14, thus restricting the side plates 14 from detaching from the connecting part 8, enabling the handle 2 to rotate relative to the connecting part 8 around the connecting columns 16. And the arrangement of the connecting sleeve 18 can prevent the side plates 14 from directly contacting the connecting columns 16. When the handle 2 rotates for a long time, the side plates 14 will not cause wear to the connecting columns 16, which can increase the service life of the product.

[0042] Preferably, a through hole 20 is formed in the connecting column 16, and a pressing member 21 is arranged in the through hole 20. The pressing member 21 includes a rod body 22 and a pressing cap 23 arranged at one end of the rod body 22. The rod body 22 is arranged in the through hole 20, and the pressing cap 23 is arranged outside the through hole 20. The lower surface of the pressing cap 23 abuts against the top end of the connecting sleeve 18. The lower surface of the pressing cap 23 at one end of the pressing member 21 abuts against the top end of the connecting sleeve 18, so as to limit the connecting sleeve 18 from separating from the connecting column 16, and enable the handle 2 to be stably connected to the connecting portion 8.

[0043] Preferably, a butt joint groove 24 is formed by inward recessing around the connecting column 16, and the bottom end of the connecting sleeve 18 is arranged in the butt joint groove 24. When the connecting sleeve 18 is sleeved on the connecting column 16, the bottom of the connecting sleeve 18 will enter the butt joint groove 24 around the connecting column 16 at this time, so that the connecting sleeve 18 is sleeved on the connecting column 16 more stably.

[0044] Preferably, the driving block 12 is arranged between the symmetric side plates 14. Fixing holes 25 are symmetrically formed in the driving block 12, mounting rods 26 are arranged in the fixing holes 25, mounting holes 27 with the same number as the mounting rods 26 are formed at the top ends of the side plates 14, both ends of the mounting rods 26 expose outside the fixing holes 25, and both ends of the mounting rods 26 are respectively arranged in the mounting holes 27 of the two side plates 14. The arrangement of the fixing holes 25 on the driving block 12 enables the mounting rods 26 to be smoothly connected to the driving block 12, and the mounting holes 27 on the side plates 14 enable the mounting rods 26 to be fixedly connected to the side plates 14, so that the driving block 12 can be mounted on the top of the handle 2 through the mounting rods 26. The number of the fixing holes 25, the mounting rods 26, and the mounting holes 27 on a single side plate 14 is two, which can limit the driving block 12 from rotating relative to the handle 2. Thus, when the user drives the handle 2 to rotate, the driving block 12 can smoothly drive the transmission gear 10 to rotate, so that the grease gun with a filling device can be used normally.

[0045] Preferably, limiting columns 28 are symmetrically arranged on both sides of the driving block 12, the fixing holes 25 penetrate through the limiting columns 28, and the limiting columns 28 on both sides of the driving block 12 respectively abut against the inner side surfaces of the two side plates 14. Since two limiting columns 28 are arranged on both the left and right sides of the driving block 12, and the limiting columns 28 on both the left and right sides of the driving block 12 respectively abut against the inner side surfaces of the two side plates 14, the driving block 12 can be effectively limited from moving left and right, so that the second tooth portion 13 at the bottom of the driving block 12 can keep meshing with the top of the transmission gear 10.

[0046] Preferably, an installation groove 9 is formed in the connecting portion 8. One end of the oil pushing rod 7 is exposed outside the oil pushing cavity 5 and located in the installation groove 9. The transmission gear 10 is arranged in the installation groove 9. Mounting holes 31 are formed in the inner walls on both sides of the installation groove 9. A gear hole 29 is formed in the middle of the transmission gear 10. The rotating shaft includes a fixed sleeve 30. The two ends of the fixed sleeve 30 are respectively arranged in the mounting holes 31 on both sides of the installation groove 9, and the fixed sleeve 30 is arranged in the gear hole 29. The arrangement of the installation groove 9 enables the rotating gear to be smoothly installed on the connecting portion 8. The mounting holes 31 in the inner walls on both sides of the installation groove 9 enable the fixed sleeve 30 to be smoothly mounted in the installation groove 9. The arrangement of the gear hole 29 enables the transmission gear 10 to be smoothly rotatably sleeved on the fixed sleeve 30.

[0047] Preferably, the rotating shaft further includes threaded rods 33 respectively arranged at both ends of the fixed sleeve 30. A threaded hole 32 is formed in the fixed sleeve 30. One end of the threaded rod 33 is arranged in the threaded hole 32. Arc-shaped holes 34 are formed on both sides of the handle 2. The other end of the threaded rod 33 is arranged outside the threaded hole 32 and located in the arc-shaped hole 34. The number of the threaded rods 33 is two and they are respectively arranged at both ends of the fixed sleeve 30. The user can rotate the two threaded rods 33 to make one end of the threaded rod 33 enter the threaded hole 32 in the fixed sleeve 30. At this time, the other ends of the two threaded rods 33 are respectively located in the arc-shaped holes 34 on both sides of the handle 2. When the handle 2 is in the starting position, the inner wall of the upper end of the arc-shaped hole 34 abuts against the threaded rod 33. After the user rotates the handle 2 outwards, when the handle 2 rotates to a certain angle, the inner wall of the lower end of the arc-shaped hole 34 abuts against the threaded rod 33. At this time, the handle 2 cannot be rotated, and the handle 2 cannot drive the oil pushing rod 7 to move outwards continuously. The manufacturer can measure the length of the arc-shaped hole 34 in advance, so that the distance that the handle 2 drives the oil pushing rod 7 to move just can open the oil inlet 6 at the bottom of the gun cap 1, thus avoiding the situation that the user continues to drive the handle 2 to drive the oil pushing rod 7 to move outwards after the oil inlet 6 is opened, and avoiding the occurrence of ineffective stroke. In the present utility model, the arc-shaped holes 34 are formed on both sides of the handle 2. Thus, when the user does not need the threaded rods 33, the user can rotate the threaded rods 33 to disassemble the threaded rods 33 from the fixed sleeve 30. The structure is simpler. Importantly, the user can choose whether to use the threaded rods 33 according to their actual needs, making the handle 2 more practical.

[0048] Preferably, a groove 35 is formed by concave molding on the outer wall of the handle 2, and a rubber grip 36 is sleeved on the bottom of the handle 2. A holding groove 37 is formed by concave molding on the rubber grip 36. The provision of the groove 35 makes the overall handle 2 more beautiful. The rubber grip 36 at the bottom of the handle 2 can increase the friction between the user's hand and the handle 2. Moreover, the material of the rubber handle 2 is a soft material, and there is a holding groove 37 on the rubber grip 36, which can make the user feel more comfortable when holding the rubber handle 2.

[0049] The above embodiments are only the preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A filling device for a grease gun, comprising a gun cover (1) connectable to the top of an oil storage pipe and a handle (2) rotatably arranged on the gun cover (1), the gun cover (1) being provided with an oil outlet nozzle (3) and an exhaust nozzle (4), an oil push chamber (5) being provided in the gun cover (1), the exhaust nozzle (4) being communicated with the oil push chamber (5), one end of the oil push chamber (5) being communicated with the oil outlet nozzle (3), an oil inlet (6) being provided at the bottom of the gun cover (1), the oil inlet (6) being communicated with the oil push chamber (5) so that grease can enter the oil push chamber (5) through the oil inlet (6), an oil push rod (7) being provided in the oil push chamber (5) for pushing grease out to the oil outlet nozzle (3), characterized in that: The gun cover (1) is also provided with a connecting portion (8), one end of the oil pushing rod (7) is exposed outside the oil pushing chamber (5), the connecting portion (8) is provided with a transmission gear (10), the transmission gear (10) is rotatably arranged on the connecting portion through a rotating shaft, the transmission gear (10) is located above the oil pushing rod (7), the oil pushing rod (7) is provided with a first tooth portion (11), the bottom of the transmission gear (10) is meshed with the first tooth portion (11), the lower half of the connecting portion (8) is provided with a rotating portion, the rotating portion The handle (2) is rotatably arranged on the rotating part, and a driving block (12) is fixedly arranged at the front end of the handle (2). The bottom of the driving block (12) is provided with a second tooth portion (13) meshing with the top end of the transmission gear (10). After the handle (2) is rotated, the driving block (12) can drive the transmission gear (10) to rotate. At this time, the transmission gear (10) drives the oil push rod (7) to move horizontally in the oil push chamber (5).

2. A grease gun filling device according to claim 1, characterized in that: The handle (2) comprises two symmetrically arranged side plates (14) and a connecting plate (15) arranged between the two side plates (14); the side plates (14) and the connecting plate (15) are integrally formed; the connecting portion (8) is arranged between the symmetrical side plates (14); the rotating portion comprises connecting columns (16) respectively arranged on both sides of the connecting portion (8); the side plates (14) are each provided with a rotating hole (17); the connecting column (16) is arranged in the rotating hole (17); a connecting sleeve (18) is arranged in the rotating hole (17); the connecting sleeve (18) is sleeved on the connecting column (16) and connected to the connecting column (16); an abutting portion (19) is provided on the outer surface of the side plates (14); one end of the connecting sleeve (18) is exposed outside the rotating hole (17) and abuts against the abutting portion (19).

3. A grease gun filling device according to claim 2, characterized in that: A through hole (20) is provided in the connecting column (16), a pressing piece (21) is provided in the through hole (20), the pressing piece (21) comprises a rod body (22) and a pressing cap (23) arranged at one end of the rod body (22), the rod body (22) is arranged in the through hole (20), the pressing cap (23) is arranged outside the through hole (20), and the lower surface of the pressing cap (23) abuts against the top end of the connecting sleeve (18).

4. A grease gun filling device according to claim 2, characterized in that: An abutment groove (24) is formed inwardly around the connection column (16), and the bottom end of the connection sleeve (18) is arranged in the abutment groove (24).

5. A grease gun filling device according to any one of claims 2 to 4, characterized in that: The driving block (12) is arranged between symmetrical side plates (14); fixing holes (25) are symmetrically provided on the driving block (12); mounting rods (26) are provided in the fixing holes (25); the top ends of the side plates (14) are provided with mounting holes (27) the same number as the mounting rods (26); both ends of the mounting rods (26) are exposed outside the fixing holes (25); and both ends of the mounting rods (26) are respectively arranged in the mounting holes (27) of the two side plates (14).

6. A grease gun filling device according to claim 5, characterized in that: Limiting columns (28) are symmetrically arranged on both sides of the driving block (12), the fixing holes (25) pass through the limiting columns (28), and the limiting columns (28) on both sides of the driving block (12) are respectively in contact with the inner side surfaces of the two side plates (14).

7. A grease gun filling device according to any one of claims 1 to 4, characterized in that: The connecting portion (8) is provided with a mounting groove (9), one end of the oil pushing rod (7) is exposed outside the oil pushing chamber (5) and is located in the mounting groove (9), the transmission gear (10) is arranged in the mounting groove (9), the inner walls on both sides of the mounting groove (9) are provided with frame holes (31), the middle part of the transmission gear (10) is provided with a gear hole (29), the rotating shaft includes a fixing sleeve (30), the two ends of the fixing sleeve (30) are respectively arranged in the frame holes (31) on both sides of the mounting groove (9), and the fixing sleeve (30) is arranged in the gear hole (29).

8. A grease gun filling device according to claim 7, characterized in that: The rotating shaft further comprises threaded rods (33) respectively arranged at two ends of the fixing sleeve (30); a threaded hole (32) is provided in the fixing sleeve (30); one end of the threaded rod (33) is arranged in the threaded hole (32); arc-shaped holes (34) are provided on both sides of the handle (2); the other end of the threaded rod (33) is arranged outside the threaded hole (32) and located in the arc-shaped hole (34).

9. A grease gun filling device according to any one of claims 1 to 4, characterized in that: The outer wall of the handle (2) is formed with a groove (35) inwardly, the bottom of the handle (2) is sleeved with a rubber grip (36), and the rubber grip (36) is formed with a gripping groove (37) inwardly.

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