Gear-adjustable electric grease gun

Abstract

An electric grease gun with adjustable gears relates to the technical field of grease guns, and comprises a grease storage barrel for storing grease, a plunger pump communicated with a grease outlet of the grease storage barrel, and a driving device for driving the plunger pump to suck, push and discharge grease, the plunger pump is provided with a gear assembly used for adjusting the oil outlet pressure and the oil outlet flow of the plunger pump. Through the design of integrating the plunger pump with adjustable gears, a user can easily adjust the oil outlet pressure and flow according to actual requirements, and precise lubricating operation is achieved.

Description

Technical Field

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

[0002] A grease gun is a manual tool for filling lubricating grease into mechanical equipment. It can be equipped with an iron gun rod (iron gun head) or a hose (flat gun head) oil filling nozzle. For oil filling positions in spacious places, the iron gun rod (iron gun head) can be used. For oil filling positions that are hidden and have many turns, the hose (flat gun head) must be used for oil filling. This product has many advantages such as simple operation, convenient carrying, and wide application range, and is an essential tool for farmers and tractor drivers, as well as maintenance centers.

[0003] Traditional grease guns may not be able to flexibly adjust the oil pressure and flow rate during oil discharge, resulting in difficulty in achieving precise lubrication in different application scenarios (such as lubrication points with different hardness or sealing requirements). Excessive oil pressure may damage the equipment, while too low oil pressure may lead to insufficient lubrication. Due to the inability to precisely control the oil pressure and flow rate, manual grease guns are prone to uneven, excessive, or insufficient lubrication during the lubrication process, affecting the operation efficiency and lifespan of the equipment. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an electric grease gun with adjustable gears, enabling users to adjust the oil discharge pressure and flow rate according to actual needs, thereby achieving precise and efficient lubrication operations.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0006] An electric grease gun with adjustable gears includes an oil storage cylinder for storing grease, a plunger pump connected to the oil outlet of the oil storage cylinder, and a driving device for driving the plunger pump to perform oil suction, oil pushing, and oil discharge actions. A gear component for adjusting the oil discharge pressure and flow rate is provided on the plunger pump.

[0007] Further, the plunger pump includes a pump body connected to the oil storage cylinder. A first plunger cavity and a second plunger cavity that are connected to the oil storage cylinder and arranged horizontally in parallel are provided inside the pump body. A first plunger rod is slidably sleeved in the first plunger cavity, and a second plunger rod is slidably sleeved in the second plunger cavity. An oil outlet nozzle connected to the first plunger cavity and the second plunger cavity is further provided on the pump body.

[0008] Further, a first oil discharge channel and a second oil discharge channel are connected to the end segments of the first plunger cavity and the second plunger cavity in the direction of the oil outlet nozzle. A hub channel is provided to penetrate between the first oil discharge channel and the second oil discharge channel. The oil outlet nozzle corresponds to the position of the first oil discharge channel, and the gear component cooperates with the hub channel to form an adjustment function.

[0009] Further, an adjusting plunger cavity is vertically and cross - arranged at the position of the hub channel, and the gear position assembly includes an adjusting plunger slidably sleeved in the adjusting plunger cavity;

[0010] When the adjusting plunger blocks between the first oil outlet channel and the second oil outlet channel, the current state is the high - pressure and low - flow oil outlet gear position;

[0011] A perforation with the same size and direction as the hub channel is penetrated through the adjusting plunger. When the position of the adjusting plunger is adjusted so that the perforation communicates with the first oil outlet channel and the second oil outlet channel, the current state is the low - pressure and high - flow oil outlet gear position.

[0012] Further, a first oil return hole and a second oil return hole are communicated and arranged on opposite sides of the adjusting plunger cavity. One end of each of the first oil return hole and the second oil return hole is communicated with the adjusting plunger cavity. The other end of the first oil return hole is communicated with the first plunger cavity, and the other end of the second oil return hole is communicated with the oil inlet cavity of the pump body; when adjusted to the high - pressure and low - flow oil outlet gear position, the perforation penetrates through the first oil return hole and the second oil return hole.

[0013] Further, the gear position assembly further includes a lever fixedly and perpendicularly connected to the adjusting plunger. The lever extends out of the pump body movably. A long hole allowing the lever to move horizontally to adjust the gear position is arranged on the pump body. A pair of positioning grooves communicating with each other are arranged at the position of the long hole. A positioning sleeve is movably sleeved on the lever. The positioning sleeve and the lever are connected by a positioning spring. The end structure of the positioning sleeve is similar to that of the positioning groove. In the positioning state, the end of the positioning sleeve abuts against the positioning groove to form the positioning of the adjusting plunger cavity.

[0014] Further, the driving device includes a driving box body fixed on the side of the pump body. A driving motor is fixedly arranged on the driving box body. One end of the output shaft of the driving motor extending into the driving box body is fixedly provided with a main transmission gear. A pair of sub - transmission gears are symmetrically arranged in the driving box body with respect to the main transmission gear. An eccentric shaft is fixedly arranged at opposite positions on the end faces of the two sub - transmission gears. The corresponding eccentric shaft is movably matched with the corresponding reciprocating swing block. A long groove allowing the eccentric shaft to make a reciprocating motion is arranged on the reciprocating swing block. The corresponding reciprocating swing block is fixedly connected to the ends of the corresponding first plunger rod and the second plunger rod. A sliding groove for guiding the left - and - right reciprocating motion of the reciprocating swing block is further arranged on the driving box body. The reciprocating swing block is accommodated in the sliding groove and abuts against the guiding walls on both sides of the sliding groove.

[0015] Further, a high - pressure pressure relief valve is arranged on the side of the first oil outlet channel, and a low - pressure pressure relief valve is arranged at the end side of the second oil outlet channel.

[0016] Further, an iron gun or a hose nozzle is fixedly connected to the position of the oil outlet.

[0017] Further, a gear identifier for identification is provided on the end face of the pump body.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model aims to provide an efficient, flexible and easy-to-operate electric grease gun, which is especially suitable for different working environments that require precise control of the grease injection amount and oil pressure. Through the integrated design of a plunger pump with adjustable gears, users can easily adjust the oil outlet pressure and flow rate according to actual needs to achieve precise lubrication operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic structural diagram of the present utility model;

[0022] Figure 2 It is a partial exploded structural diagram of the present utility model;

[0023] Figure 3 It is a sectional structural diagram of the present utility model;

[0024] Figure 4 It is a sectional structural diagram of the present utility model from another angle;

[0025] Figure 5 It is a sectional structural diagram of the present utility model from another angle;

[0026] Figure 6 It is a sectional structural diagram of the present utility model from another angle;

[0027] Figure 7 It is a structural diagram of the present utility model from another angle with the oil storage cylinder hidden;

[0028] Figure 8 It is a sectional structural diagram of the present utility model from another angle;

[0029] Figure 9 It is a structural diagram of the gear assembly of the present utility model.

[0030] In the figure: 1. Oil storage cylinder, 2. Plunger pump, 201. First plunger chamber, 202. Second plunger chamber, 203. First plunger rod, 204. Second plunger rod, 205. First oil outlet channel, 206. Second oil outlet channel, 207. Hub channel, 208. Oil nozzle, 209. Adjusting plunger chamber, 210. First oil return hole, 211. Second oil return hole, 212. Oil inlet opening, 213. Positioning groove, 3. Driving device, 31. Driving box body, 32. Driving motor, 33. Main transmission gear, 34. Sub - transmission gear, 35. Eccentric shaft, 36. Reciprocating swing block, 37. Long groove, 38. Slide groove, 4. Gear position assembly. 41. Adjusting plunger, 42. Perforation, 43. Lever, 44. Positioning sleeve, 45. Positioning spring. Detailed implementation mode

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0034] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0035] As Figures 1-9 shown, an electric grease gun with adjustable gears includes an oil storage cylinder 1 for storing grease, a plunger pump 2 communicated with the oil outlet of the oil storage cylinder 1, and a driving device 3 for driving the plunger pump 2 to perform oil suction, oil pushing and oil discharging actions. A gear component 4 for adjusting the oil pressure and oil flow rate of the oil discharge is arranged on the plunger pump 2.

[0036] The present utility model provides such an electric grease gun with adjustable gears. By introducing the oil storage cylinder 1 to store grease, the plunger pump 2 to achieve the oil suction, oil pushing and oil discharging actions of the grease, and the driving device 3 to provide power, the most crucial is the setting of the gear component 4, which enables the user to adjust the oil pressure and flow rate of the oil discharge according to actual needs, so as to achieve precise and efficient lubrication operations. This design not only improves the precision and efficiency of the lubrication operation, but also reduces the labor intensity and maintenance cost, and enhances the applicability and automation degree of the equipment.

[0037] As a further optional embodiment of the present utility model, the plunger pump 2 includes a pump body connected to the oil storage cylinder 1. A first plunger chamber 201 and a second plunger chamber 202 which are communicated with the oil storage cylinder 1 and arranged in parallel in the horizontal direction are provided in the pump body. A first plunger rod 203 is slidably sleeved in the first plunger chamber 201, and a second plunger rod 204 is slidably sleeved in the second plunger chamber 202. An oil outlet nozzle 208 which is communicated with the first plunger chamber 201 and the second plunger chamber 202 is further provided on the pump body. The driving device includes a driving box body 31 fixed on the side of the pump body. A driving motor 32 is fixedly arranged on the driving box body 31. A main transmission gear 33 is fixedly arranged at one end of the output shaft of the driving motor 32 extending into the driving box body 31. A pair of sub-transmission gears 34 are symmetrically arranged in the driving box body 31 with respect to the main transmission gear 33. An eccentric shaft 35 is fixedly arranged at opposite positions on the end faces of the two sub-transmission gears 34. The corresponding eccentric shaft 35 is movably matched with the corresponding reciprocating swing block 36. A long groove 37 allowing the eccentric shaft 35 to make reciprocating motion is provided on the reciprocating swing block 36. The corresponding reciprocating swing block 36 is fixedly connected to the ends of the corresponding first plunger rod 203 and second plunger rod 204. A sliding groove 38 for guiding the left and right reciprocating motion of the reciprocating swing block 36 is further provided on the driving box body 31. The reciprocating swing block 36 is accommodated in the sliding groove 38 and abuts against the guiding walls on both sides of the sliding groove 38.

[0038] When the driving motor 32 starts during use, its output shaft drives the main transmission gear 33 fixed thereon to rotate. The main transmission gear 33 further drives a pair of secondary transmission gears 34 meshing with it to rotate. These two secondary transmission gears 34 are symmetrically arranged with respect to the main transmission gear 33, ensuring the balance of power transmission. An eccentric shaft 35 is fixed on the end face of each secondary transmission gear 34. As the secondary transmission gear 34 rotates, the eccentric shaft 35 will perform a rotational motion, but its axis is eccentric with respect to the gear center. Therefore, the rotation of the eccentric shaft 35 will cause its axis position to produce a periodic offset with respect to the gear center, that is, to perform an "eccentric rotation". The eccentric shaft 35 is movably fitted with the reciprocating swing block 36 through a long slot 37. When the eccentric shaft 35 rotates, the periodic offset of its axis position will push the reciprocating swing block 36 to move back and forth left and right in the sliding slot 38. The sliding slot 38 provides guidance and limit for the reciprocating swing block 36, ensuring that it can only move back and forth along a predetermined trajectory. Since the reciprocating swing block 36 is fixedly connected to the ends of the first plunger rod 203 and the second plunger rod 204, the left and right reciprocating motion of the reciprocating swing block 36 will drive the first plunger rod 203 and the second plunger rod 204 to perform corresponding reciprocating motions in their respective plunger chambers (201 and 202). When the plunger rod moves backward (in the direction away from the oil nozzle 208), the volume in the plunger chamber increases, forming a negative pressure, thereby sucking the oil in the oil storage cylinder 1 into the plunger chamber. When the plunger rod moves forward (in the direction towards the oil nozzle 208), the volume in the plunger chamber decreases, and the oil is compressed and discharged through the oil nozzle 208, completing the oil pumping process. As the driving motor 32 continues to rotate, the above process is continuously repeated, realizing the continuous pumping of oil. Among them, the driving motor drives the first plunger rod 203 and the second plunger rod 204 to perform asynchronous linear motions in the first plunger chamber 201 and the second plunger chamber 202 respectively, that is, when the first plunger rod 203 moves outward to achieve the oil suction action, the second plunger rod 204 moves inward to achieve the oil pushing action, and vice versa, when the first plunger rod 203 moves inward to achieve the oil pushing action, the second plunger rod 204 moves outward to achieve the oil suction action.

[0039] As a further optional embodiment of the present utility model, the end segments of the first plunger chamber 201 and the second plunger chamber 202 are communicated with a first oil outlet passage 205 and a second oil outlet passage 206 in the direction of the oil nozzle 208. A hub passage 207 is provided through between the first oil outlet passage 205 and the second oil outlet passage 206. The oil nozzle 208 corresponds to the position of the first oil outlet passage 205, and the gear component 4 cooperates with the hub passage 207 to form an adjustment function. An adjustment plunger chamber 209 is vertically and crosswise arranged at the position of the hub passage 207. The gear component 4 includes an adjustment plunger 41 slidably sleeved in the adjustment plunger chamber 209. When the adjustment plunger 41 blocks between the first oil outlet passage 205 and the second oil outlet passage 206, the current state is the high-pressure and low-flow oil outlet gear. A through hole 42 having the same size and direction as the hub passage 207 is provided through the adjustment plunger 41. When the position of the adjustment plunger 41 is adjusted so that the through hole 42 communicates the first oil outlet passage 205 and the second oil outlet passage 206, the current state is the low-pressure and high-flow oil outlet gear. First oil return holes 210 and second oil return holes 211 are communicated on opposite sides of the adjustment plunger chamber 209. One ends of the first oil return holes 210 and the second oil return holes 211 are both communicated with the adjustment plunger chamber 209. The other end of the first oil return hole 210 is communicated with the first plunger chamber 201, and the other end of the second oil return hole 211 is communicated with the oil inlet chamber of the pump body. When adjusted to the high-pressure and low-flow oil outlet gear, the through hole 42 penetrates the first oil return hole 210 and the second oil return hole 211.

[0040] First, when the driving device drives the first plunger rod 203 and the second plunger rod 204 to reciprocate in their respective plunger chambers (the first plunger chamber 201 and the second plunger chamber 202), the oil is sucked in and discharged. This is achieved by the backward movement (suction) and forward movement (discharge) of the plunger rod. The core of the gear component 4 is the adjustment plunger 41, which is located in the vertically and crosswise adjustment plunger chamber 209. The position of this adjustment plunger 41 determines the oil pressure and flow rate of the oil outlet.

[0041] High-pressure and low-flow gear: When the adjustment plunger 41 is adjusted to the high-pressure and low-flow gear and the adjustment plunger 41 completely blocks between the first oil outlet passage 205 and the second oil outlet passage 206, the oil only flows out through the first oil outlet passage 205, thereby increasing the oil outlet pressure but decreasing the flow rate.

[0042] Low-pressure and high-flow gear: When the adjustment plunger 41 is adjusted to the low-pressure and high-flow gear so that the through hole 42 on the adjustment plunger 41 is completely aligned with the first oil outlet passage 205 and the second oil outlet passage 206, the oil can flow out smoothly through these two passages and the hub passage 207, reducing the outflow resistance, thereby reducing the oil outlet pressure but increasing the flow rate.

[0043] Oil return mechanism: In the high-pressure and low-flow gear position, the perforation 42 penetrates the first oil return hole 210 and the second oil return hole 211 at this time. This means that when the plunger rod moves forward (discharges), the oil discharged through the second oil outlet channel 206 may flow back to the oil inlet cavity of the oil inlet system pump body through the oil return hole, thereby realizing the control of the oil flow under high pressure and reducing the pressure peak.

[0044] As a further optional implementation manner of the present utility model, the gear position assembly 4 further includes a lever 43 fixedly and vertically connected to the adjusting plunger 41. The lever 43 extends out of the pump body movably. A long hole allowing the lever 43 to move horizontally to adjust the gear position is provided on the pump body. A pair of positioning grooves 213 communicating with each other are arranged at the position of the long hole. A positioning sleeve 44 is movably sleeved on the lever 43. The positioning sleeve 44 is connected to the lever 43 through a positioning spring 45. The end structure of the positioning sleeve 44 is similar to that of the positioning groove 213. In the positioning state, the end of the positioning sleeve 44 abuts against the positioning groove 213 to form the positioning of the adjusting plunger cavity 209.

[0045] Gear position adjustment: The user manually operates the lever 43 to move it horizontally in the long hole provided on the pump body. This movement will drive the adjusting plunger 41 fixedly and vertically connected thereto to move in the adjusting plunger cavity 209, thereby changing its position relative to the first oil outlet channel 205, the second oil outlet channel 206, and the hub channel 207.

[0046] Function of the positioning sleeve: A positioning sleeve 44 is movably sleeved on the lever 43, and the positioning sleeve 44 is connected to the lever 43 through a positioning spring 45. This design allows the positioning sleeve 44 to disengage outward relative to the positioning groove 213 when subjected to an external force. After adjusting the gear position, when the external force is removed, the positioning spring 45 will cause the positioning sleeve 44 to automatically reset to another positioning groove 213. The end structure of the positioning sleeve 44 is similar to that of the positioning groove 213. When the lever 43 moves to the gear position, the end of the positioning sleeve 44 will abut against the positioning groove 213, thereby locking the positions of the lever 43 and the adjusting plunger 41 and realizing the positioning of the gear position.

[0047] Gear position effect: By adjusting the positions of the lever 43 and the positioning sleeve 44, the user can easily switch between the high-pressure and low-flow gear position and the low-pressure and high-flow gear position. In the high-pressure and low-flow gear position, the adjusting plunger 41 blocks the oil flow, increasing the oil outlet pressure but reducing the flow rate; in the low-pressure and high-flow gear position, the perforation 42 of the adjusting plunger 41 is aligned with the oil outlet channel, allowing the oil to flow out smoothly, reducing the oil outlet pressure but increasing the flow rate.

[0048] As a further optional embodiment of the present utility model, a high-pressure relief valve is provided on the side of the first oil outlet passage 205, and a low-pressure relief valve is provided on the end side of the second oil outlet passage 206.

[0049] As a further optional embodiment of the present utility model, oil inlet openings 212 communicating with the oil inlet cavity of the pump body are provided on the first plunger cavity 201 and the second plunger cavity 202.

[0050] As a further optional embodiment of the present utility model, a gear position identifier for identification is provided on the end face of the pump body.

[0051] It is worth mentioning that check valves are provided in the first oil outlet passage 205, the second oil outlet passage 206, and the hub passage 207.

[0052] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

[0053] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electric grease gun with adjustable gear position, characterized in that: The invention comprises an oil storage cylinder (1) for storing butter, a plunger pump (2) connected to the oil outlet of the oil storage cylinder (1), and a driving device (3) for driving the plunger pump (2) to suck oil, push oil, and discharge oil. The plunger pump (2) is provided with a gear assembly (4) for adjusting the oil pressure and oil flow rate of the oil discharge.

2. The electric grease gun with adjustable gear position according to claim 1, characterized in that: The plunger pump (2) comprises a pump body connected to the oil storage cylinder (1); a first plunger cavity (201) and a second plunger cavity (202) which are connected to the oil storage cylinder (1) and arranged in parallel in a horizontal direction are provided in the pump body; a first plunger rod (203) is provided in a sliding sleeve in the first plunger cavity (201); a second plunger rod (204) is provided in a sliding sleeve in the second plunger cavity (202); and an oil outlet nozzle (208) which is connected to the first plunger cavity (201) and the second plunger cavity (202) is also provided on the pump body.

3. The electric grease gun with adjustable gear position according to claim 2, characterized in that: The first and second oil outlet passages (205 and 206) are connected to each other at the end of the first plunger chamber (201) and the second plunger chamber (202) in the direction of the oil outlet nozzle (208). A pivot passage (207) is provided between the first and second oil outlet passages (205 and 206). The oil outlet nozzle (208) corresponds to the first oil outlet passage (205) in position. The gear assembly (4) cooperates with the pivot passage (207) to form an adjustment function.

4. The electric grease gun with adjustable gear position according to claim 3, characterized in that: The pivot channel (207) is provided with an adjusting plunger cavity (209) vertically intersecting therewith, and the shift assembly (4) comprises an adjusting plunger (41) slidably sleeved in the adjusting plunger cavity (209); When the regulating plunger (41) is blocked between the first oil outlet channel (205) and the second oil outlet channel (206), the current state is a high-pressure and low-flow oil outlet gear position; The regulating plunger (41) is provided with a through hole (42) having the same size and direction as the pivot channel (207). When the position of the regulating plunger (41) is adjusted so that the through hole (42) is connected to the first oil outlet channel (205) and the second oil outlet channel (206), the current state is a low-pressure and high-flow oil outlet gear.

5. The electric grease gun with adjustable gear position according to claim 4, characterized in that: A first oil return hole (210) and a second oil return hole (211) are provided on opposite sides of the regulating plunger cavity (209); one end of each of the first oil return hole (210) and the second oil return hole (211) is in communication with the regulating plunger cavity (209); the other end of the first oil return hole (210) is in communication with the first plunger cavity (201); and the other end of the second oil return hole (211) is in communication with the oil inlet cavity of the pump body; when the oil outlet gear is adjusted to a high-pressure and low-flow oil outlet gear, the through hole (42) passes through the first oil return hole (210) and the second oil return hole (211).

6. The electric grease gun with adjustable gear position according to claim 4, characterized in that: The gear assembly (4) also includes a lever (43) fixedly connected to the adjusting plunger (41) in a vertical position, the lever (43) movably extending out of the pump body, the pump body is provided with a long hole allowing the lever (43) to move laterally to adjust the gear, a pair of mutually connected positioning grooves (213) are provided at the position of the long hole, a positioning sleeve (44) is movably sleeved on the lever (43), the positioning sleeve (44) and the lever (43) are connected via a positioning spring (45), the end structure of the positioning sleeve (44) is similar to the positioning groove (213), in the positioning state, the end of the positioning sleeve (44) abuts against the positioning groove (213) to form the positioning of the adjusting plunger cavity (209).

7. The electric grease gun with adjustable gear position according to claim 2, characterized in that: The driving device comprises a driving box body (31) fixed to the side of the pump body, a driving motor (32) being fixedly arranged on the driving box body (31), a main transmission gear (33) being fixedly arranged at one end of the output shaft of the driving motor (32) extending into the driving box body (31), a pair of auxiliary transmission gears (34) being symmetrically arranged in the driving box body (31) with respect to the main transmission gear (33), an eccentric shaft (35) being fixedly arranged at opposite positions of the end surfaces of the two auxiliary transmission gears (34), and the corresponding eccentric shafts (35) ) is movably matched with the corresponding reciprocating pendulum block (36), and the reciprocating pendulum block (36) is provided with a long groove (37) allowing the eccentric shaft (35) to reciprocate, and the corresponding reciprocating pendulum block (36) is fixedly connected with the corresponding ends of the first plunger rod (203) and the second plunger rod (204), and the driving box body (31) is also provided with a slide groove (38) for guiding the reciprocating pendulum block (36) to reciprocate left and right, and the reciprocating pendulum block (36) is accommodated in the slide groove (38) and contacts with the guide walls on both sides of the slide groove (38).

8. The electric grease gun with adjustable gear position according to claim 3, characterized in that: A high-pressure relief valve is provided on the side of the first oil outlet channel (205), and a low-pressure relief valve is provided on the end side of the second oil outlet channel (206).

9. The electric grease gun with adjustable gear position according to claim 5, characterized in that: The first plunger cavity (201) and the second plunger cavity (202) are provided with oil inlet openings (212) which are in communication with the oil inlet cavity of the pump body.

10. The electric grease gun with adjustable gear position according to claim 6, characterized in that: The end surface of the pump body is provided with a gear position mark for marking.

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