Electric grease gun

Abstract

The utility model belongs to the technical field of grease guns, and particularly relates to an electric grease gun which comprises a gun cover and a grease storage barrel which are detachably connected, a grease outlet hole and a plunger hole are formed in the gun cover, the grease storage barrel is connected with the grease outlet hole through the plunger hole, a plunger rod is arranged in the plunger hole in a sliding mode, and a driving device is arranged on the gun cover. The driving device drives the plunger rod to move and drives oil in the oil storage cylinder to be discharged from the oil outlet hole, the driving device comprises a driving motor and the plunger rod arranged on the gun cover in a sliding mode, an output shaft of the driving motor is connected with a planetary gear set, the output end of the planetary gear set is connected with an eccentric wheel, and the eccentric wheel is rotationally arranged on the gun cover. A shifting groove is formed in the plunger rod, and a shifting rod matched with the shifting groove is arranged on the eccentric wheel; the driving motor drives the eccentric wheel to rotate through the planetary gear set and drives the plunger rod to slide relative to the gun cover through the shifting rod and the shifting groove. The electric grease gun is simple in structure and convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of grease guns, and particularly relates to an electric grease gun. Background Art

[0002] A grease gun is a manual tool for filling lubricating grease into mechanical equipment. Most traditional grease guns are manually filled with grease. To facilitate the use of users, many electric-driven grease guns have emerged on the market.

[0003] Most of the gun covers of the electric grease guns on the market are provided with an oil inlet, a chamber, and an oil outlet. A plunger rod is slidably arranged in the chamber, and the grease is discharged by driving the plunger rod. The gun cover of a common grease gun is an improved electric double-rod grease gun disclosed in Chinese Utility Model Patent CN202321248536.6. It includes an oil storage cylinder, a plunger pump, and a driving device; the plunger pump includes a pump body, and a first plunger chamber and a second plunger chamber are arranged in parallel along the horizontal direction in the pump body. A first plunger rod and a second plunger rod are respectively arranged in the first plunger chamber and the second plunger chamber; the driving device includes a driving motor, a reduction mechanism, a main transmission gear, a first sub-transmission gear, a second sub-transmission gear, a first eccentric shaft, a second eccentric shaft, a first connecting rod, and a second connecting rod. The first sub-transmission gear and the second sub-transmission gear are both meshed with the main transmission gear. The first eccentric shaft and the second eccentric shaft are respectively arranged on the first sub-transmission gear and the second sub-transmission gear. One end of the first connecting rod is movably connected to the first eccentric shaft, and the other end is movably connected to the first plunger rod. One end of the second connecting rod is movably connected to the second eccentric shaft, and the other end is movably connected to the second plunger rod. It further improves the oil filling efficiency of the electric double-rod grease gun, and the structure is reasonable and reliable.

[0004] In the above structure, the reduction mechanism drives the connecting rod to move through the eccentric shaft on the sub-transmission gear, and then drives the plunger rod to move through the connecting rod. During the use of this structure, the plunger rod is easily driven by the connecting rod to swing towards the side of the plunger chamber, thereby affecting the stable sliding of the plunger chamber and affecting the service life of the electric grease gun. Summary of the Invention

[0005] In order to overcome the defects in the prior art, the purpose of the utility model is to provide an electric grease gun with a simple structure and convenient use.

[0006] The purpose of the utility model is achieved as follows:

[0007] An electric grease gun, comprising a detachable gun cap and an oil storage cylinder. An oil outlet hole and a plunger hole are provided on the gun cap. The plunger hole connects the oil storage cylinder with the oil outlet hole. A plunger rod is slidably arranged in the plunger hole. A driving device is provided on the gun cap. The driving device drives the plunger rod to move and drives the oil in the oil storage cylinder to be discharged from the oil outlet hole. The driving device includes a driving motor and a plunger rod slidably arranged on the gun cap. A planetary gear set is connected to the output shaft of the driving motor. The output end of the planetary gear set is connected to an eccentric wheel. The eccentric wheel is rotatably arranged on the gun cap. A dial groove is provided on the plunger rod, and a dial rod adapted to the dial groove is provided on the eccentric wheel. The driving motor drives the eccentric wheel to rotate through the planetary gear set, and drives the plunger rod to slide relative to the gun cap through the dial rod and the dial groove.

[0008] The present utility model is further arranged as follows: An oil inlet hole and an oil storage groove are provided on the gun cap. The oil inlet hole and the oil storage groove are respectively arranged on the left and right sides of the plunger hole. The plunger rod passes between the oil inlet hole and the oil storage groove and drives the oil in the plunger hole to be discharged from the oil outlet hole.

[0009] The present utility model is further arranged as follows: The oil inlet hole and the oil storage groove are coaxially arranged. The hole penetrates through the plunger hole and forms an oil inlet hole and an oil storage groove on the left and right sides of the plunger hole.

[0010] The present utility model is further arranged as follows: The diameter of the oil inlet hole is larger than that of the plunger hole. The oil inlet hole extends to the front and rear sides of the plunger hole, so that the oil can enter the plunger hole from the front and rear sides of the plunger hole.

[0011] The present utility model is further arranged as follows: A pressure sensor for detecting the oil pressure in the plunger hole is provided on the gun cap, or a torque sensor for detecting the torque on the driving motor or the dial rod is provided on the driving device. A circuit board for controlling the movement of the driving motor is provided on the driving device. The circuit board is electrically connected to the pressure sensor or the torque sensor. When the detection result of the pressure sensor or the torque sensor is greater than the set value, the circuit board controls the driving motor to stop working.

[0012] The present utility model is further arranged as follows: The driving motor is a brushless motor.

[0013] The present utility model is further arranged as follows: The eccentric wheel includes a rotatable block and a dial rod which are detachably connected. The dial rod is eccentrically arranged with respect to the rotatable block. A rotating groove is provided on the gun cap, and a first bearing is arranged in the rotating groove. The rotatable block is arranged in the rotating groove through the first bearing. One end of the dial rod passes through the first bearing and is connected to the dial groove.

[0014] The present utility model is further arranged as follows: The dial rod includes a rod body and a limiting end. A connecting hole is provided on the rotatable block. The first bearing is sleeved on the outer periphery of the connecting hole. A rotating sleeve is sleeved on the rod body. The rod body is detachably connected to the connecting hole and the rotating sleeve is rotatably arranged on the rotatable block. The rotating sleeve is arranged in the dial groove, and the rod body drives the plunger rod to move through the rotating sleeve.

[0015] The present utility model is further configured as follows: A connecting member is provided on the driving device. The connecting member is spaced from the gun cover and is relatively fixed to the oil storage cylinder. The gun cover and the connecting member are respectively provided with a first support protrusion and a second support protrusion. Both the first support protrusion and the second support protrusion are arranged on the side of the oil storage cylinder away from the driving device, and the first support protrusion and the second support protrusion can jointly support the electric grease gun.

[0016] The present utility model is further configured as follows: An installation opening for installing a grease cartridge is provided on the gun cover. The installation hole communicates with the plunger hole. A storage cavity for placing the grease cartridge is provided in the oil storage cylinder, and a push plate and a compression spring are provided in the storage cavity. The compression spring drives the push plate to abut against the grease cartridge, and squeezes the grease in the grease cartridge into the plunger hole through the installation opening.

[0017] The advantages of the present utility model compared with the prior art are as follows:

[0018] 1. In the present utility model, the driving motor drives the eccentric wheel to rotate through the planetary gear set, and drives the plunger rod to slide relative to the gun cover through the dial rod on the eccentric wheel and the dial groove on the plunger rod. During the use of this structure, the main relative acting force between the dial rod and the dial groove is along the length direction of the plunger hole, and the relative acting force between the dial rod and the dial groove along the radial direction of the plunger hole is small, which is beneficial to the stable sliding of the plunger rod, reduces the friction between the plunger rod and the plunger hole during use, and is beneficial to extending the service life of the electric grease gun.

[0019] 2. The oil inlet hole and the oil storage groove respectively arranged on the left and right sides of the plunger hole in the present utility model facilitate the full extrusion of grease into the plunger hole during use, can reduce the air bubbles in the grease in the plunger hole during use, is beneficial to the continuous extrusion of grease, and is convenient for users to use; the oil inlet hole and the oil storage groove are formed by holes penetrating through the left and right sides of the plunger hole, which is beneficial to the production and processing of the oil inlet hole and the oil storage groove, and is convenient for the production of the electric grease gun; since the diameter of the oil inlet hole is larger than the diameter of the plunger hole and extends to the front and rear sides of the plunger hole, it is beneficial for the grease in the oil inlet hole to enter the plunger hole from multiple angles, is beneficial to reducing the air bubbles in the grease in the plunger hole, is beneficial to the continuous extrusion of grease, and is convenient for users to use.

[0020] 3. The setting of the pressure sensor or the torque sensor in the present utility model can prevent the plunger rod from continuing to work when the electric grease gun is blocked during use, thereby causing damage to the grease gun, and is beneficial to extending the service life of the grease gun; there is no carbon brush on the brushless motor, the friction during use is greatly reduced, the operation is smooth, the noise is low, and the wear of the brushless motor during use is mainly on the bearing. From a mechanical perspective, the brushless motor is almost a maintenance-free motor with a long service life and low maintenance cost.

[0021] 4. In the present utility model, the detachable rotating block and the lever are convenient for the production and processing of the eccentric wheel. The setting of the first bearing not only facilitates the stable rotation of the eccentric wheel, reduces the friction of the eccentric wheel during use, and thus extends the service life of the electric grease gun; the setting of the rotating sleeve is conducive to reducing the friction between the lever and the slot during use, reducing the relative acting force between the lever and the slot along the radial direction of the plunger hole, reducing the friction between the plunger rod and the plunger hole, and is beneficial to extending the service life of the electric grease gun. Moreover, the setting of the limiting end facilitates the quick installation of the rotating sleeve, and the connecting hole provided in the first bearing is conducive to the stable installation of the lever, avoiding damage to the connecting hole caused by excessive force on the lever, and is beneficial to extending the service life of the electric grease gun.

[0022] 5. In the present utility model, the setting of the connecting piece is conducive to the stable installation of the oil storage cylinder, avoiding damage to the connection position between the oil storage cylinder and the gun cap due to excessive force on the oil storage cylinder, and is beneficial to extending the service life of the electric grease gun. The settings of the first supporting protrusion and the second supporting protrusion facilitate the stable placement of the electric grease gun and are convenient for the user to use; the settings of the installation port, the push plate and the compression spring facilitate the user to install the grease cartridge in the oil storage cylinder and are convenient for the user to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural view of the present utility model;

[0024] Figure 2 is a sectional view of the present utility model;

[0025] Figure 3 is an exploded view of the present utility model;

[0026] Figure 4 is a schematic structural view of the gun cap in the present utility model;

[0027] Figure 5 is a sectional view of the gun cap in the present utility model;

[0028] Figure 6 is a schematic structural view of the connecting piece in the present utility model;

[0029] Figure 7 is a schematic structural view of the planetary gear set in the present utility model;

[0030] Figure 8 is a schematic structural view of the eccentric wheel in the present utility model;

[0031] Figure 9 is a sectional view of the eccentric wheel in the present utility model;

[0032] Figure 10 is a schematic structural view of the plunger rod in the present utility model.

[0033] Meanings of the reference numerals in the figure: 1 - gun cap; 11 - plunger hole; 12 - oil outlet hole; 13 - oil inlet hole; 14 - oil storage tank; 15 - mounting port; 16 - first support protrusion; 17 - rotation groove; 18 - mounting groove; 19 - air release valve;

[0034] 121 - check valve; 181 - guiding groove; 2 - oil storage cylinder; 21 - push plate; 22 - compression spring; 3 - driving device; 31 - housing; 4 - sealing cover; 5 - connecting piece; 51 - second support protrusion; 52 - hinge seat; 6 - driving motor; 61 - planetary gear set; 62 - eccentric wheel; 63 - first bearing; 611 - mounting seat; 612 - guiding protrusion; 613 - planet gear; 614 - output hole; 621 - rotating block; 622 - lever; 623 - rotating sleeve; 624 - transmission rod; 625 - connecting hole; 626 - limiting end; 627 - rod body; 7 - plunger rod; 71 - slot; 72 - guiding surface; 8 - grease cartridge. Specific embodiments

[0035] The following further describes the present utility model with specific embodiments in conjunction with the accompanying drawings:

[0036] See Figures 1 to 10 As shown, an electric grease gun includes a detachable gun cap 1 and an oil storage cylinder 2. An oil outlet hole 12 and a plunger hole 11 are provided on the gun cap 1. A check valve 121 is connected to the oil outlet hole 12. The plunger hole 11 connects the oil storage cylinder 2 with the oil outlet hole 12. A plunger rod 7 is slidably arranged in the plunger hole 11. A driving device 3 is provided on the gun cap 1. The driving device 3 drives the plunger rod 7 to move and drives the oil in the oil storage cylinder 2 to be discharged from the oil outlet hole 12. The driving device 3 includes a driving motor 6 and a plunger rod 7 slidably arranged on the gun cap 1. A planetary gear set 61 is connected to the output shaft of the driving motor 6. The output end of the planetary gear set 61 is connected to an eccentric wheel 62. The eccentric wheel 62 is rotatably arranged on the gun cap 1. A slot 71 is provided on the plunger rod 7. A lever 622 adapted to the slot 71 is provided on the eccentric wheel 62. The driving motor 6 drives the eccentric wheel 62 to rotate through the planetary gear set 61, and drives the plunger rod 7 to slide relative to the gun cap 1 through the lever 622 and the slot 71. In this structure, the driving motor 6 drives the eccentric wheel 62 to rotate through the planetary gear set 61, and drives the plunger rod 7 to slide relative to the gun cap 1 through the lever 622 on the eccentric wheel 62 and the slot 71 on the plunger rod 7. During the use of this structure, the main relative acting force between the lever 622 and the slot 71 is along the length direction of the plunger hole 11, while the relative acting force between the lever 622 and the slot 71 in the radial direction of the plunger hole 11 is small, which is beneficial to the stable sliding of the plunger rod 7, reduces the friction between the plunger rod 7 and the plunger hole 11 during use, and is beneficial to extending the service life of the electric grease gun.

[0037] In this embodiment, the driving device 3 includes two detachably connected housings 31. The driving motor 6 and the planetary gear set 61 are both arranged in the housing 31. A sealing cover 4 is detachably arranged on the gun cover 1. The sealing cover 4 covers the end of the eccentric wheel 62 and hides the eccentric wheel 62 and the plunger rod 7.

[0038] Preferably, the slot 71 is arc-shaped, and a guiding surface 72 is arranged at the end of the plunger rod 7. The plunger rod 7 is guided through the plunger hole 11 through the guiding surface 72.

[0039] In the present utility model, an oil inlet hole 13 and an oil storage groove 14 are arranged on the gun cover 1. The oil inlet hole 13 and the oil storage groove 14 are respectively arranged on the left and right sides of the plunger hole 11. The plunger rod 7 passes between the oil inlet hole 13 and the oil storage groove 14 and drives the oil in the plunger hole 11 to be discharged from the oil outlet hole 12. This structure facilitates the full extrusion of the grease into the plunger hole 11 during use, can reduce the air bubbles in the grease in the plunger hole 11 during use, is beneficial to the continuous extrusion of the grease, and is convenient for the user to use.

[0040] A vent valve 19 is further connected to the plunger hole 11. The connection position of the vent valve 19 and the plunger hole 11 is located between the oil outlet hole 12 and the oil inlet hole 13.

[0041] In this embodiment, the oil inlet hole 13 and the oil storage groove 14 are coaxially arranged. The hole penetrates through the plunger hole 11 and forms the oil inlet hole 13 and the oil storage groove 14 on the left and right sides of the plunger hole 11. This structure is beneficial to the production and processing of the oil inlet hole 13 and the oil storage groove 14 and is convenient for the production of the electric grease gun.

[0042] The diameter of the oil inlet hole 13 is larger than the diameter of the plunger hole 11. The oil inlet hole 13 extends to the front and rear sides of the plunger hole 11, so that the oil can enter the plunger hole 11 from the front and rear sides of the plunger hole 11. This structure is beneficial to the grease in the oil inlet hole 13 entering the plunger hole 11 from the axis of the oil inlet hole 13 and the front and rear sides of the plunger hole 11, is beneficial to reducing the air bubbles in the grease in the plunger hole 11, is beneficial to the continuous extrusion of the grease, and is convenient for the user to use.

[0043] In the present utility model, a pressure sensor for detecting the oil pressure in the plunger hole 11 is arranged on the gun cover 1. Alternatively, a torque sensor for detecting the torque on the driving motor 6 or the lever 622 is arranged on the driving device 3. A circuit board for controlling the movement of the driving motor 6 is arranged on the driving device 3. The circuit board is electrically connected to the pressure sensor or the torque sensor. When the detection result of the pressure sensor or the torque sensor is greater than the set value, the circuit board controls the driving motor 6 to stop working. The arrangement of the pressure sensor or the torque sensor can prevent the plunger rod 7 from continuing to work when the electric grease gun is blocked during use, thereby causing damage to the grease gun, and is beneficial to extending the service life of the grease gun.

[0044] In the present utility model, the pressure sensor or torque sensor is not specifically shown in the attached drawings of the specification. However, those skilled in the art can implement the above technical solutions based on their own experience and the content of the specification.

[0045] Preferably, the drive motor 6 is a brushless motor. There is no brush on the brushless motor, so the friction is greatly reduced during use, the operation is smooth, the noise is low, and the wear of the brushless motor during use is mainly on the bearings. From a mechanical perspective, the brushless motor is almost a maintenance-free motor with a long service life and low maintenance cost.

[0046] In the present utility model, the eccentric wheel 62 includes a rotatable block 621 and a lever 622 that are detachably connected. The lever 622 is eccentrically arranged with respect to the rotatable block 621. A rotating groove 17 is provided on the gun cap 1, and a first bearing 63 is provided in the rotating groove 17. The rotatable block 621 is arranged in the rotating groove 17 through the first bearing 63. One end of the lever 622 passes through the first bearing 63 and is connected to the dial groove 71. The detachable connection between the rotatable block 621 and the lever 622 facilitates the production and processing of the eccentric wheel 62. The setting of the first bearing 63 not only helps the stable rotation of the eccentric wheel 62, but also helps reduce the friction of the eccentric wheel 62 during use, thereby extending the service life of the electric grease gun.

[0047] A mounting groove 18 is provided on one side of the rotating groove 17. A guiding groove 181 is provided on the side wall of the mounting groove 18, and the guiding groove 181 extends along the axial direction of the rotating groove 17. The planetary gear set 61 is arranged in the mounting groove 18. The planetary gear set 61 includes a mounting seat 611. A fastener is provided on the gun cap 1, and the fastener extends to the end of the mounting seat 611 to prevent the mounting seat 611 from disengaging from the mounting groove 18. A guiding protrusion 612 adapted to the guiding groove 181 is provided on the mounting seat 611. An internal gear is provided inside the mounting seat 611, and a plurality of planet gears 613 are provided at the output end of the planetary gear set 61. Output holes 614 are provided on the planet gears 613, and a transmission rod 624 adapted to the output holes 614 on each planet gear 613 is provided on the eccentric wheel 62. Each planet gear 613 drives the eccentric wheel 62 to rotate through the output holes 614 and the transmission rod 624.

[0048] In this embodiment, the lever 622 includes a rod body 627 and a limiting end 626. A connecting hole 625 is provided on the rotating block 621. The first bearing 63 is sleeved on the outer periphery of the connecting hole 625. A rotating sleeve 623 is sleeved on the rod body 627. The rod body 627 is detachably connected to the connecting hole 625 and the rotating sleeve 623 is rotatably arranged on the rotating block 621. The rotating sleeve 623 is inserted into the shifting groove 71, and the rod body 627 drives the plunger rod 7 through the rotating sleeve 623. The setting of the rotating sleeve 623 is beneficial to reducing the friction between the lever 622 and the shifting groove 71 during use, reducing the relative acting force between the lever 622 and the shifting groove 71 along the radial direction of the plunger hole 11, reducing the friction between the plunger rod 7 and the plunger hole 11, which is beneficial to extending the service life of the electric grease gun. And the setting of the limiting end 626 facilitates the quick installation of the rotating sleeve 623. The connecting hole 625 arranged in the first bearing 63 is beneficial to the stable installation of the lever 622, avoiding damage to the connecting hole 625 caused by excessive force on the lever 622, and is beneficial to extending the service life of the electric grease gun.

[0049] A connecting member 5 is provided on the driving device 3. The connecting member 5 is spaced from the gun cap 1 and is relatively fixed to the oil storage cylinder 2. And the gun cap 1 and the connecting member 5 are respectively provided with a first supporting protrusion 16 and a second supporting protrusion 51. Both the first supporting protrusion 16 and the second supporting protrusion 51 are arranged on the side where the oil storage cylinder 2 is away from the driving device 3. The first supporting protrusion 16 and the second supporting protrusion 51 can jointly support the electric grease gun. The setting of the connecting member 5 is beneficial to the stable installation of the oil storage cylinder 2, avoiding damage to the connection position between the oil storage cylinder 2 and the gun cap 1 caused by excessive force on the oil storage cylinder 2, and is beneficial to extending the service life of the electric grease gun. And the setting of the first supporting protrusion 16 and the second supporting protrusion 51 facilitates the stable placement of the electric grease gun and is convenient for the user to use. In this embodiment, a hinge seat 52 rotatably connected to the housing 31 is provided on the connecting member 5.

[0050] An installation opening 15 for installing the grease cartridge 8 is provided on the gun cap 1 of the present utility model. The installation hole communicates with the plunger hole 11. A storage cavity for placing the grease cartridge 8 is provided in the oil storage cylinder 2. And a push plate 21 and a compression spring 22 are provided in the storage cavity. The compression spring 22 drives the push plate 21 to abut against the grease cartridge 8, and squeezes the grease in the grease cartridge 8 into the plunger hole 11 through the installation opening 15. The settings of the installation opening 15, the push plate 21 and the compression spring 22 facilitate the user to install the grease cartridge 8 in the oil storage cylinder 2 and are convenient for the user to use.

[0051] The above embodiments are only the preferred embodiments of the present utility model, and do not limit the protection scope of the present utility model accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. An electric grease gun, comprising a detachably connected gun cover (1) and an oil storage cylinder (2), the gun cover (1) being provided with an oil outlet hole (12) and a plunger hole (11), the plunger hole (11) connecting the oil storage cylinder (2) with the oil outlet hole (12), a plunger rod (7) being slidably arranged in the plunger hole (11), a driving device (3) being provided on the gun cover (1), the driving device (3) driving the plunger rod (7) to move and drive the oil in the oil storage cylinder (2) to be discharged from the oil outlet hole (12), characterized in that: The driving device (3) comprises a driving motor (6) and a plunger rod (7) slidably arranged on the gun cover (1); the output shaft of the driving motor (6) is connected to a planetary gear set (61); the output end of the planetary gear set (61) is connected to an eccentric wheel (62); the eccentric wheel (62) is rotatably arranged on the gun cover (1); a shifting groove (71) is arranged on the plunger rod (7); and a shifting rod (622) adapted to the shifting groove (71) is arranged on the eccentric wheel (62); the driving motor (6) drives the eccentric wheel (62) to rotate through the planetary gear set (61), and drives the plunger rod (7) to slide relative to the gun cover (1) through the shifting rod (622) and the shifting groove (71).

2. An electric grease gun according to claim 1, characterized in that: The gun cover (1) is provided with an oil inlet hole (13) and an oil storage groove (14), which are respectively arranged on the left and right sides of the plunger hole (11). The plunger rod (7) passes between the oil inlet hole (13) and the oil storage groove (14) and drives the oil in the plunger hole (11) to be discharged from the oil outlet hole (12).

3. An electric grease gun according to claim 2, characterized in that: The oil inlet hole (13) and the oil storage tank (14) are coaxially arranged, and the hole penetrates the plunger hole (11) to form the oil inlet hole (13) and the oil storage tank (14) on the left and right sides of the plunger hole (11).

4. The electric grease gun according to claim 2, characterized in that: The diameter of the oil inlet hole (13) is greater than the diameter of the plunger hole (11), and the oil inlet hole (13) extends to both sides of the plunger hole (11), so that oil can enter the plunger hole (11) from both sides of the plunger hole (11).

5. The electric grease gun according to claim 1, characterized in that: The gun cover (1) is provided with a pressure sensor for detecting the oil pressure in the plunger hole (11), or the drive device (3) is provided with a torque sensor for detecting the torque on the drive motor (6) or the lever (622). The drive device (3) is provided with a circuit board for controlling the movement of the drive motor (6), and the circuit board is electrically connected to the pressure sensor or the torque sensor. When the detection result of the pressure sensor or the torque sensor is greater than a set value, the circuit board controls the drive motor (6) to stop working.

6. The electric grease gun according to claim 1, characterized in that: The driving motor (6) is a brushless motor.

7. The electric grease gun according to claim 1, characterized in that: The eccentric wheel (62) comprises a detachably connected rotating block (621) and a lever (622); the lever (622) and the rotating block (621) are eccentrically arranged; a rotating groove (17) is arranged on the gun cover (1); a first bearing (63) is arranged in the rotating groove (17); the rotating block (621) passes through the first bearing (63) in the rotating groove (17); one end of the lever (622) passes through the first bearing (63) and is connected to the lever groove (71).

8. The electric grease gun according to claim 7, characterized in that: The shifting rod (622) comprises a rod body (627) and a limiting end (626); a connecting hole (625) is provided on the rotating block (621); a first bearing (63) is sleeved on the outer periphery of the connecting hole (625); a rotating sleeve (623) is sleeved on the rod body (627); the rod body (627) and the connecting hole (625) are detachably connected so that the rotating sleeve (623) is rotatably arranged on the rotating block (621); the rotating sleeve (623) is inserted into the shifting groove (71); and the rod body (627) drives the plunger rod (7) to move via the rotating sleeve (623).

9. The electric grease gun according to claim 1, characterized in that: The driving device (3) is provided with a connecting member (5), the connecting member (5) is spaced apart from the gun cover (1) and fixed relative to the oil storage cylinder (2), and the gun cover (1) and the connecting member (5) are respectively provided with a first supporting protrusion (16) and a second supporting protrusion (51), the first supporting protrusion (16) and the second supporting protrusion (51) are both provided on a side of the oil storage cylinder (2) away from the driving device (3), and the first supporting protrusion (16) and the second supporting protrusion (51) can jointly support the electric grease gun.

10. The electric grease gun according to claim 1, characterized in that: The gun cover (1) is provided with a mounting opening (15) for mounting a grease bullet (8), the mounting opening being in communication with the plunger hole (11), the oil storage cylinder (2) being provided with a storage cavity for accommodating the grease bullet (8), and the storage cavity being provided with a push plate (21) and a squeeze spring (22), the squeeze spring (22) driving the push plate (21) to press against the grease bullet (8), and squeezing the grease in the grease bullet (8) into the plunger hole (11) through the mounting opening (15).

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