A transmission structure of a grease gun

Abstract

The present invention belongs to the technical field of the transmission structure of a grease gun, and particularly refers to a transmission structure of a grease gun, which includes a grease gun housing. A manifold seat and a grease bucket are arranged on the grease gun housing. The manifold seat is arranged at the front end of the grease bucket. A push rod is arranged in the grease bucket. A push plate is arranged at the end of the push rod. A spring is installed on the push rod. Under the action of the spring, the lubricating oil in the grease bucket is pushed into the manifold seat. An electric motor is arranged on the grease gun housing, and a plunger is arranged in the manifold seat. The electric motor drives the eccentric wheel to rotate, and the eccentric wheel drives the plunger to perform a piston motion in the manifold seat. The eccentric wheel is provided with at least one standard arc segment. When the plunger is driven by the standard arc segment of the eccentric wheel, the plunger does not move. The present invention provides a transmission structure of a grease gun that is simple and stable in structure, has no oil return phenomenon, and is convenient for maintenance.

Description

Technical Field

[0001] The invention belongs to the technical field of the transmission structure of a grease gun, and particularly relates to a transmission structure of a grease gun. Background Art

[0002] A grease gun is a manual tool for filling lubricating grease into mechanical equipment. Due to market demand, electric grease guns have gradually become marketable and are becoming more and more common. An electric grease gun is a miniature electric grease gun. Generally, an electric grease gun on the market consists of a grease gun housing, a plunger mechanism, a crank-slider mechanism, a gear reduction mechanism, an oil supply system, an operating system, and a power system: It has a small structure, a built-in battery, can be externally equipped with a charger, is driven by a DC motor, has a moderate price, is labor-saving, fast, easy to operate, has a relatively large pressure, and can meet the general mechanical oil injection requirements. However, traditional electric grease guns have an oil return phenomenon and are not convenient to repair. Summary of the Invention

[0003] The purpose of the invention is to provide a transmission structure of a grease gun that is simple and stable in structure, has no oil return phenomenon, and is convenient to repair.

[0004] The purpose of the invention is achieved as follows:

[0005] A transmission structure of a grease gun includes a grease gun housing. A manifold seat and a grease bucket are arranged on the grease gun housing. The manifold seat is arranged at the front end of the grease bucket. A push rod is arranged in the grease bucket. A push plate is arranged at the end of the push rod. A spring is installed on the push rod. Under the action of the spring, the lubricating oil in the grease bucket is pushed into the manifold seat. A motor is arranged on the grease gun housing, and a plunger is arranged in the manifold seat. The motor drives an eccentric wheel to rotate, and the eccentric wheel drives the plunger to perform a piston movement in the manifold seat.

[0006] The eccentric wheel is provided with at least one standard arc. When the plunger is driven by the standard arc section of the eccentric wheel, the plunger does not move.

[0007] It includes a rotating shaft. Two eccentric wheels are connected to the rotating shaft. The two eccentric wheels are arranged in a staggered manner and realize asynchronous rotation on the rotating shaft. Each eccentric wheel is connected with a corresponding plunger. And the standard arc is located at the end of the eccentric wheel far from the rotating shaft / at the end of the eccentric wheel close to the rotating shaft.

[0008] At least one first end face is arranged on the rotating shaft. The eccentric wheel is provided with a second end face that matches the first end face. Under the abutting action of the first end face and the second end face, the rotating shaft can drive the eccentric wheel to rotate.

[0009] Both ends of the rotating shaft are supported by bearings. And a sleeve is arranged between the two eccentric wheels.

[0010] A cage is provided on the outer side of the eccentric wheel. The cage is limited to the outer side of the eccentric wheel, and the plunger is fixed on the cage.

[0011] Slots are provided on the cage, and an annular groove is provided at the end of the plunger. The plunger is limited on the slots through the annular groove.

[0012] The cage covers the outer side of the eccentric wheel. An arc surface is provided at the upper end of the cage, and a protrusion is provided at the lower end of the cage. The eccentric wheel is limited between the arc surface and the protrusion.

[0013] The manifold seat is detachably provided on the grease gun housing. A first track is provided on the grease gun housing, and a second track adapted to the first track is provided on the manifold seat. The manifold seat is fixed on the grease gun housing through fasteners.

[0014] One side of the grease gun housing is open. An eccentric wheel is arranged at one end of the open end, and a manifold seat is detachably provided at the other end of the open end.

[0015] It includes a sealing plate. The sealing plate presses the manifold seat and blocks the open end. The fasteners fix the sealing plate on the grease gun housing and / or the manifold seat.

[0016] An oil nozzle, an exhaust valve and a pressure reducing valve are provided at the outlet of the manifold seat.

[0017] The prominent and beneficial technical effects of the present invention compared with the prior art are:

[0018] 1. A standard arc is provided at one end of the eccentric wheel of the present invention. Through the standard arc, the plunger located within this arc segment does not move, giving the plunger a stagnant time during the movement process. During this period, the lubricating oil in the manifold seat is replenished. Moreover, the standard arc is located at the end of the eccentric wheel away from the rotating shaft / at the end of the eccentric wheel close to the rotating shaft. The standard arc is located at the position where the plunger changes direction. A one-way valve is provided in the oil nozzle. By giving a stagnant time at the position where the plunger changes direction, the one-way valve in the oil nozzle has a closing reaction time, eliminating the phenomenon of lubricating oil backflow. And after eliminating the backflow, the overall movement of the plunger is more continuous without a sense of jerk.

[0019] 2. The two eccentric wheels of the present invention are arranged in a staggered manner and achieve asynchronous rotation on the rotating shaft. Through the asynchronous rotating eccentric wheels, the effect that one plunger enters the manifold seat and the other plunger moves away from the manifold seat is realized. Through this structure, the load that needs to be overcome during the rotation of the motor is stable, avoiding excessive local stress on the motor and ensuring the stability of the motor.

[0020] 3. A slot is provided on the cage of the present invention, and an annular groove is provided at the end of the plunger. The plunger is limited on the slot through the annular groove. During installation, the user only needs to clamp the annular groove of the plunger in the slot, which is convenient for the user to install. Moreover, the most vulnerable part of the grease gun is the manifold block, and it is difficult for the user to determine the specific damage location. For the convenience of user maintenance, the manifold block of the present invention is detachably arranged on the grease gun housing. When the grease gun is damaged, the entire manifold block is replaced as a whole. The user only needs to remove the fasteners, take the damaged manifold block off the first track, and then insert a new manifold block and lock the fasteners. The overall maintenance does not require professional personnel, and the operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2 is one of the exploded structural diagrams of the present invention;

[0023] Figure 3 is Figure 2 the enlarged structural diagram of part A of

[0024] Figure 4 is Figure 2 the enlarged structural diagram of part B of

[0025] Figure 5 is the second exploded structural diagram of the present invention;

[0026] Figure 6 is Figure 5 the enlarged structural diagram of part C of

[0027] Figure 7 is the internal structural diagram of the present invention;

[0028] Figure 8 is Figure 7 the enlarged structural diagram of part D of

[0029] Figure 9 is Figure 7 the enlarged structural diagram of part E of

[0030] Figure 10 is the structural diagram of the eccentric wheel of the present invention.

[0031] In the figure: 1 - grease gun housing; 10 - sealing plate; 11 - open end; 12 - first track; 19 - fastener; 2 - motor; 21 - reduction gear set; 22 - rotating shaft; 221 - first end face; 23 - eccentric wheel; 231 - standard arc; 232 - second end face; 24 - plunger; 241 - annular groove; 25 - cage; 251 - arc surface; 252 - protrusion; 253 - slot; 26 - bearing; 27 - sleeve; 3 - grease bucket; 31 - push rod; 32 - spring; 33 - push plate; 4 - manifold block; 40 - chamber; 41 - exhaust valve; 42 - oil outlet nozzle; 43 - pressure reducing valve; 44 - plug; 45 - second track. Detailed implementation mode

[0032] The present invention will be further described below in conjunction with the accompanying drawings with specific embodiments, as shown in Figures 1-10 shown:

[0033] A transmission structure of a grease gun, including a grease gun housing 1, a manifold block 4 and a grease bucket 3 are arranged on the grease gun housing 1, the manifold block 4 is arranged at the front end of the grease bucket 3, a push rod 31 is arranged in the grease bucket 3, a push plate 33 is arranged at the end of the push rod 31, a spring 32 is installed on the push rod 31, and under the action of the spring 32, the lubricating oil in the grease bucket 3 is pushed into the manifold block 4. A motor 2 is arranged on the grease gun housing 1, a plunger 24 is arranged in the manifold block 4, the motor 2 drives the eccentric wheel 23 to rotate and drives the plunger 24 to perform a piston motion in the manifold block 4 through the eccentric wheel 23. The internal transmission structure of the grease gun of the present invention is a common technology. The motor 2 can directly drive the rotating shaft 22 to rotate / the motor drives the rotating shaft 22 to rotate through a coupling, or can also drive the rotating shaft 22 to rotate after decelerating through the reduction gear set 21, and the rotating shaft 22 drives the eccentric wheel 23 to rotate.

[0034] The eccentric wheel 23 is provided with at least one standard arc 231. When the plunger 24 is driven by the standard arc section of the eccentric wheel 23, the plunger 24 does not move, giving the plunger 24 a stagnant time during the movement process. During this period, the lubricating oil in the manifold block 4 is replenished. And, the standard arc 231 is located at the end of the eccentric wheel 23 far from the rotating shaft 22 / at the end of the eccentric wheel 23 close to the rotating shaft 22. The standard arc 231 is located at the position where the plunger 24 changes direction. A check valve is arranged in the oil outlet nozzle 42 at the outlet position of the manifold block 4. By giving a stagnant time at the position where the plunger 24 changes direction, the check valve in the oil outlet nozzle 42 has a closing reaction time, eliminating the phenomenon of lubricating oil backflow. Moreover, after eliminating the backflow, the overall movement of the plunger 24 is more continuous without a sense of jerk.

[0035] It includes a rotating shaft 22, and two eccentric wheels 23 are connected to the rotating shaft 22. The two eccentric wheels 23 are arranged in a staggered manner and achieve asynchronous rotation on the rotating shaft 22. Each eccentric wheel 23 is connected to a corresponding plunger 24. The two eccentric wheels 23 are arranged in a staggered manner and achieve asynchronous rotation of the eccentric wheels 23 on the rotating shaft 22. Through the asynchronous rotation of the eccentric wheels 23, the effect that one plunger 24 enters the manifold block and the other plunger 24 moves away from the manifold block 4 is achieved. With this structure, the load that needs to be overcome during the rotation of the motor 2 is stabilized, avoiding excessive local stress on the motor 2 and ensuring the stability of the motor 2.

[0036] At least one first end face 221 is provided on the rotating shaft 22, and the eccentric wheel 23 is provided with a second end face 232 that cooperates with the first end face 221. Under the abutting action of the first end face 221 and the second end face 232, the rotating shaft 22 can drive the eccentric wheel 23 to rotate. With the simplest structure, the rotating shaft 22 can drive the eccentric wheel 23 to rotate.

[0037] Both ends of the rotating shaft 22 are supported by bearings 26. The rotating shaft 22 is erected through the bearings 26 to make the rotation of the rotating shaft 22 more stable. Moreover, a sleeve 27 is provided between the two eccentric wheels 23 to position the two eccentric wheels 23 through the sleeve 27 and prevent the eccentric wheels 23 from being offset during rotation.

[0038] A cage 25 is provided on the outer side of the eccentric wheel 23. The cage 25 is limited on the outer side of the eccentric wheel 23, and the plunger 24 is fixed on the cage 25. The cage 25 is preferably wrapped around the outer side of the eccentric wheel 23, so as to achieve the movement of the eccentric wheel 23 driving the cage 25. Moreover, an arc surface 251 is provided at the upper end of the cage 25, and a protrusion 252 is provided at the lower end of the cage 25. The eccentric wheel 23 is limited between the arc surface 251 and the protrusion 252. The friction between the eccentric wheel 23 and the cage 25 is reduced through the arc surface 251 and the protrusion 252 to make the transmission more stable.

[0039] A slot 253 is provided on the cage 25, and an annular groove 241 is provided at the end of the plunger 24. The plunger 24 is limited on the slot 253 through the annular groove 241. During installation, the user only needs to clamp the annular groove 241 of the plunger 24 into the slot 253, which is convenient for the user to install.

[0040] The manifold base 4 is detachably arranged on the grease gun housing 1. A first track 12 is arranged on the grease gun housing 1, and a second track 45 adapted to the first track 12 is arranged on the manifold base 4. The manifold base 4 is fixed on the grease gun housing 1 by a fastener 19. The part of the grease gun that is prone to damage is the manifold base 4, and it is difficult for users to determine the specific damage location. To facilitate user maintenance, in the present invention, the manifold base 4 is detachably arranged on the grease gun housing 1. When the grease gun is damaged, the entire manifold base 4 is replaced as a whole. The user only needs to remove the fastener 19, take the damaged manifold base 4 off the first track 12, then insert a new manifold base 4 and lock it with the fastener 19. The overall maintenance does not require professional personnel, and the operation is simple and convenient.

[0041] One side of the grease gun housing 1 is an open end 11. An eccentric wheel 23 is arranged at one end of the open end 11, and a manifold base 4 is detachably arranged at the other end of the open end 11. The setting of the open end 11 is beneficial for the manufacturer to assemble. The structures of the eccentric wheel part and the manifold base are both within the open end 11, and the components are more concentrated, optimizing the product layout. Moreover, the open end 11 also provides a maintenance window. After the open end 11 is exposed, the eccentric wheel transmission part can be directly observed, making it more convenient to replace the eccentric wheel and add transmission lubricating oil.

[0042] It includes a sealing plate 10. The sealing plate 10 presses the manifold base 4 and blocks the open end 11. The fastener 19 fixes the sealing plate 10 on the grease gun housing 1 and / or the manifold base 4. The fastener 19 is preferably a bolt. The sealing plate 10 is both a blocking part and a fixing part.

[0043] An oil outlet nozzle 42, an exhaust valve 41 and a pressure reducing valve 43 are arranged at the outlet of the manifold base 4. Lubricating oil is discharged outward through the oil outlet nozzle 42. The oil outlet nozzle 42 is actually a one-way valve, and the one-way valve is a conventional design, namely a structure of a spring with a steel ball. Those skilled in the art are familiar with this, so the one-way valve is not shown in the attached drawings. The lubricating oil needs to flow out through the oil outlet nozzle 42. Both the exhaust valve 41 and the pressure reducing valve 43 are purchased on the market. The applicant only assembles these two components on the grease gun, so the exhaust valve 41 and the pressure reducing valve 43 are not shown in the attached drawings.

[0044] The product of the present invention will inevitably involve circuits and control circuit boards. However, the control circuit board adopted in the present invention is an outsourced part. According to the requirements of our product, it is provided to the circuit design manufacturer, and the manufacturer can provide the corresponding control circuit board. We only need to connect the wires. Moreover, in the present invention, only by controlling the motor to rotate / stop, the circuit design is very simple, and those skilled in the art can easily design the circuit control board.

[0045] The above embodiments are only 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 shall be covered within the protection scope of the present invention.

Claims

1. A transmission structure of a grease gun, comprising a grease gun housing (1), a manifold block (4) and a grease bucket (3) are arranged on the grease gun housing (1), the manifold block (4) is arranged at the front end of the grease bucket (3), a push rod (31) is arranged in the grease bucket (3), a push plate (33) is arranged at the end of the push rod (31), a spring (32) is installed on the push rod (31), and under the action of the spring (32), the lubricating oil in the grease bucket (3) is pushed into the manifold block (4), characterized in that: A motor (2) is provided on the grease gun housing (1), and a plunger (24) is provided in the manifold block (4). The motor (2) drives the eccentric wheel (23) to rotate, and drives the plunger (24) to perform a piston movement in the manifold block (4) through the eccentric wheel (23). The eccentric wheel (23) is provided with at least one standard arc (231). When the plunger (24) is driven by the standard arc section of the eccentric wheel, the plunger (24) does not move. It includes a rotating shaft (22), and two eccentric wheels (23) are connected to the rotating shaft (22). The two eccentric wheels (23) are arranged in a staggered manner and achieve asynchronous rotation on the rotating shaft (22). Each eccentric wheel (23) is connected to a corresponding plunger (24). Moreover, the standard arc (231) is located at the end of the eccentric wheel (23) away from the rotating shaft (22) / is located at the end of the eccentric wheel (23) close to the rotating shaft (22). The manifold block (4) is detachably provided on the grease gun housing (1). A first track (12) is provided on the grease gun housing (1), and a second track (45) adapted to the first track (12) is provided on the manifold block (4). The manifold block (4) is fixed on the grease gun housing (1) through a fastener (19). A cage (25) is provided outside the eccentric wheel (23). The cage (25) is limited outside the eccentric wheel (23), and the plunger (24) is limited on the cage (25). The cage (25) covers the outside of the eccentric wheel (23). An arc surface (251) is provided at the upper end of the cage (25), and a protrusion (252) is provided at the lower end of the cage (25). The eccentric wheel (23) is limited between the arc surface (251) and the protrusion (252). A slot (253) is provided on the cage (25), and an annular groove (241) is provided at the end of the plunger (24). The plunger (24) is limited on the slot (253) through the annular groove (241).

2. The transmission structure of the grease gun according to claim 1, characterized in that: At least one first end face (221) is provided on the rotating shaft (22), and the eccentric wheel (23) is provided with a second end face (232) that cooperates with the first end face (221). Under the abutting action of the first end face (221) and the second end face (232), the rotating shaft (22) can drive the eccentric wheel (23) to rotate.

3. The transmission structure of the grease gun according to claim 1 or 2, characterized in that: Both ends of the rotating shaft (22) are supported by bearings (26), and a sleeve (27) is provided between the two eccentric wheels (23).

4. The transmission structure of the grease gun according to claim 1, characterized in that: One side of the grease gun housing (1) is an open end (11). An eccentric wheel (23) is arranged at one end of the open end (11), and a manifold block (4) is detachably provided at the other end of the open end (11). It includes a sealing plate (10). The sealing plate (10) presses the manifold block (4) and blocks the open end (11). The fastener (19) fixes the sealing plate (10) on the grease gun housing (1) and / or the manifold block (4).

5. The transmission structure of the grease gun according to claim 1, characterized in that: An oil nozzle (42), an exhaust valve (41) and a pressure reducing valve (43) are provided at the outlet of the manifold block (4).

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